Adhera Therapeutics, Inc. - Annual Report: 2010 (Form 10-K)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

Form 10-K

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2010

Commission File Number 000-13789

MARINA BIOTECH, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code:

(425) 908-3600

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ¨    No  þ

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.    Yes  ¨    No  þ

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þ    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ¨    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  þ

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check One):

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act.)    Yes  ¨    No  þ

The aggregate market value of the voting stock held by non-affiliates of the Registrant was approximately $43.9 million as of June 30, 2010 based upon the closing price of $3.60 per share on the Nasdaq Global Market reported on June 30, 2010.

As of March 17, 2011, there were 34,364,514 shares of the Registrant’s $0.006 par value common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

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MARINA BIOTECH, INC.

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FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. These forward-looking statements reflect our current views with respect to future events or our financial performance, and involve certain known and unknown risks, uncertainties and other factors, including those identified below, those discussed in Item 1A of this report under the heading “Risk Factors,” and those discussed in our other filings with the Securities and Exchange Commission, which may cause our or our industry’s actual or future results, levels of activity, performance or achievements to differ materially from those expressed or implied by any forward-looking statements or from historical results. We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act and Section 21E of the Exchange Act. Forward-looking statements include information concerning our possible or assumed future results of operations and statements preceded by, followed by, or that include the words “may,” “will,” “could,” “would,” “should,” “believe,” “expect,” “plan,” “anticipate,” “intend,” “estimate,” “predict,” “potential” or similar expressions.

Forward-looking statements are inherently subject to risks and uncertainties, many of which we cannot predict with accuracy and some of which we might not even anticipate. Although we believe that the expectations reflected in such forward-looking statements are based upon reasonable assumptions at the time made, we can give no assurance that such expectations will be achieved. Future events and actual results, financial and otherwise, may differ materially from the results discussed in the forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements. We undertake no obligation to publicly update or revise any forward-looking statements after the date of this Annual Report on Form 10-K or to conform them to actual results, new information, future events or otherwise, except as otherwise required by securities and other applicable laws.

The following factors, among others, could cause our or our industry’s future results to differ materially from historical results or those anticipated:

These factors are the important factors of which we are currently aware that could cause actual results, performance or achievements to differ materially from those expressed in any of our forward-looking statements. We operate in a continually changing business environment, and new risk factors emerge from time to time. Other unknown or unpredictable factors also could have material adverse effects on our future results, performance or achievements. We cannot assure you that projected results or events will be achieved or will occur.

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PART I

OVERVIEW AND BUSINESS STRATEGY

We are a biotechnology company focused on the discovery, development and commercialization of oligonucleotide therapies based on gene silencing approaches such as RNA interference (RNAi) and blocking messenger RNA (mRNA) transcription. Our goal is to improve human health through the development of these nucleic acid-based therapeutics as well as the drug delivery technologies that together provide superior treatment options for patients. We have multiple proprietary technologies integrated into a broad oligonucleotide-based drug discovery platform, with the capability to deliver these novel therapeutics via systemic, local and oral administration to target a wide range of human diseases based on the unique characteristics of the cells and organs involved in each disease.

Our pipeline includes a clinical program in Familial Adenomatous Polyposis (FAP) and two preclinical programs in malignant ascites and bladder cancer, respectively. In February 2011, we entered an exclusive agreement with Debiopharm Group for the development and commercialization of the bladder cancer program.

Our team of approximately 30 scientists brings expertise in molecular and cellular biology, microbiology, oligonucleotide, nucleoside, lipid, peptide and alkylated amino acid chemistry, pharmacology, bioinformatics, pre-clinical and clinical development, regulatory affairs and quality control, in addition to an experienced pharmaceutical management team.

In addition to our own, internally developed technologies, we strategically in-license and further develop nucleic acid- and delivery-related technologies, forming an integrated drug discovery platform. We are currently employing our platform for the discovery of multiple nucleic-based therapeutics including RNAi-, microRNA- and single stranded oligonucleotide-based drugs.

Our business strategy is two-fold. First, we strive to establish collaborations and strategic partnerships with pharmaceutical and biotechnology companies in the area of nucleic acid-based therapeutics to: (1) generate revenue and non-dilutive financing; (2) gain access to technical resources; and (3) further validate our drug discovery platforms. Secondly, we expect to advance our own pipeline of nucleic acid-based therapeutics as a foundation upon which to improve all aspects of our drug discovery platform and to have the opportunity to commercialize drug therapies. In terms of collaborations and strategic partnerships, the Debiopharm Group is fully funding the development of the bladder cancer program using our proprietary DiLA² delivery technology for local administration which includes the potential for significant milestones, and ProNAi Therapeutics, a licensee of certain of our technology, is funding their Phase 1 clinical trial using our proprietary SMARTICLES^® delivery technology for systemic administration, which does not provide any financial benefit to us but continues to validate and advance our SMARTICLES^® delivery technology. With these relationships financing the advancement of several of our small interfering RNA (siRNA) proprietary delivery technologies, we are focusing resources on the Phase 1b/2a clinical trial of CEQ508 in Familial Adenomatous Polyposis (FAP) as well as the development of our Conformationally Restricted Nucleotide technology (CRN) for the development of single-stranded oligonucleotide therapies.

In 2010 we entered into five early collaborative efforts (a sixth had been initiated in 2009) with major pharmaceutical companies and a biotechnology company to evaluate our DiLA² and SMARTICLES delivery technologies for local and systemic delivery of siRNA. Four of the six efforts continued into 2011, and our goal continues to be the establishment of a strategic partnership with at least one of these companies in 2011. We expect to structure certain of our collaborative agreements to receive upfront non-refundable payments, research and development funding, milestone payments and royalties on commercial sales of products.

With respect to collaborations and strategic partnerships our concept is to provide multiple therapeutic options based on a partner’s target and indication. We can apply our broad capabilities to pursue the most

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appropriate nucleic acid therapeutic approach to a specific, often undruggable, target for a specific indication. Each approach, i.e. RNAi, microRNA or single-strand oligonucleotide, has its advantages and disadvantages and we can utilize our broad capabilities to screen across multiple modalities to identify the most effective therapeutic. We believe this capability makes us extremely unique in the sector.

In 2010, we acquired Cequent Pharmaceuticals, Inc. and its TransKingdom RNA^™ interference (tkRNAi) platform and FAP clinical program, the intellectual property related to CRN technology from Valeant Pharmaceuticals and the intellectual property related to SMARTICLES from Novosom. Additionally, we licensed one of our nasal legacy assets, carbetocin, to Cypress Biosciences.

In order to protect our innovations, which encompass a broad platform of both nucleic acid constructs and delivery technologies, as well as the drug products that may emerge from that platform; we aggressively continue to build upon our extensive and enabling intellectual property (“IP”) estate.

We believe we have established ourselves as a leading nucleic acid-based therapeutics company by leveraging our broad and proven expertise to create an industry-leading integrated nucleic acid-based drug discovery platform, which is protected by a strong IP position and validated through licensing agreements with two large international pharmaceutical companies, our FAP phase 1b/2a clinical trial, the bladder cancer research and license agreement with Debiopharm Group and the phase 1 ProNAi trial using our SMARTICLES delivery technology.

RESEARCH AND DEVELOPMENT

Our research and development personnel are organized into functional teams that include pharmacology, toxicology, chemistry, formulation, cell biology, bioinformatics, process development, preclinical and clinical development and project management. We conduct our research and development activities at our headquarters in Bothell, Washington and in Cambridge, Massachusetts. We anticipate that our research and development expenses will decrease in 2011 compared to 2010 due to cost containment and cost cutting measures and our cash burn will also decrease due to funding and potential milestones resulting from the Debiopharm collaboration and cost containment and cost cutting measures.

NUCLEIC ACID-BASED THERAPEUTICS

Overview

Nucleic acid-based therapeutics act on mRNA to degrade protein expression and can target any gene with a high degree of specificity; these technologies include RNAi, microRNA (miRNA mimetics and antagomirs), and single stranded oligonucleotides which function through a translational inhibition mechanism.

We are developing novel technologies and therapeutics based predominately on the Nobel Prize-winning discovery of RNA interference (RNAi). The discovery of RNAi, in 1998, has led not only to its widespread use in the research of biological mechanisms and target validation but also to its application in down regulating the expression of certain disease-causing proteins found in a wide spectrum of diseases including inflammation, cancer, and metabolic dysfunction. RNAi-based therapeutics work through a naturally occurring process within cells that has the effect of reducing levels of messenger RNA (mRNA) required for the production of proteins. RNAi enables the targeting of disease at a genetic level and thus is highly specific to particular disease-causing proteins. Like RNAi-based therapeutics, single stranded oligonucleotides also interact with mRNA and interfere with protein translation. MicroRNAs (miRNA), on the other hand, are small non-coding RNAs that are important in gene regulation and protein translation. Antagomir (or miRNA antagonists) therapeutics targeting a specific miRNA can potentially down regulate multiple proteins associated with the genes under the control of the miRNA target. Conversely, miRNA mimetics increase the level of a miRNA in the cell and can thereby potentially up regulate multiple proteins associated with the genes under the control of that miRNA target. The advantage of a miRNA mimetic is significant in that few human therapeutics are designed to increase proteins

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where a protein deficiency has led to disease. Nucleic acid-based therapeutics which target a gene to prevent the expression of the protein unlike small molecules or protein drugs which are aimed at inhibiting the unwanted protein or blocking the receptor on which the protein acts.

The strategy behind our acquisition of key intellectual property and technologies over the past year has been to position us to provide multiple nucleic acid-based therapeutic alternatives to the pharmaceutical companies difficult to target and undruggable target needs. We feel we are establishing one of the broadest nucleic acid platforms in the sector with validation on several fronts: (1) Debiopharm licensing our preclinical bladder cancer program with our UsiRNA/DiLA² platform, (2) ProNAi Therapeutics using our SMARTICLES delivery technology for systemic administration of a DNAi oligonucleotide in a Phase 1 trial to treat solid tumors and (3) our own Phase 1 program in Familial Adenomatous Polyposis using our tkRNAi system. In addition, we are advancing our proprietary chemistry for single-stranded constructs (antagomirs and single-stranded oligonucleotides). At this time, several nucleic acid-based therapeutics are being evaluated in human clinical trials.

We intend to build on our pre-clinical oncology successes and move a second pre-clinical program, malignant ascites, toward early clinical studies. In addition, we will continue to increase the breadth and capabilities of our drug discovery platform including further demonstration of the unique advantages and potency of the UsiRNA construct, increasing the breadth of the delivery platform, and advancing additional proprietary chemistry and delivery technologies. Our business model anticipates that the advancement of a therapeutic pipeline, either through partnerships or on our own, will continue to provide proof of concept for our drug discovery platform as well as value for shareholders.

Nucleic Acid-Based Drug Discovery Platform

We are making advances in both areas crucial to the development of nucleic acid-based therapeutics: constructs and delivery technologies. Although each area is equally important to the development of an effective therapeutic, the scientific challenges of delivery appear to be one of the most significant obstacles to the broad use of nucleic acid-based therapeutics in the treatment of human diseases.

UsiRNA Constructs. Our UsiRNAs, similar to siRNAs but with substitution of UNA bases in place of RNA bases in key regions of the duplex, have shown important advantages in terms of efficacy and safety, when compared to standard siRNA molecules and modifications. UsiRNAs are highly active in rodent-based disease models, non-disease rodent models, and non-human primates. UsiRNAs function by RNAi to cleave their mRNA target and decrease the production of the protein associated with the target, and in the case of bladder and liver cancer the UsiRNAs decrease tumor growth. UsiRNAs have demonstrated a lower potential for cytokine induction and provide resistance to nuclease degradation, two effects that are often prominent with standard siRNAs. Most important, substitution with UNA at specific sites greatly increases the specificity for RNAi and improves their profile for therapeutic use. Substitution in the passenger strand can eliminate the ability of this strand to participate in RNAi and thereby the potential for unwanted effects on other targets or compete with guide strand activity by loading into the intracellular RNAi machinery. Substitution of UNA within the guide strand can eliminate microRNA-like effects that occur with standard siRNA; microRNA-like off-target activity cannot often be addressed by bioinformatics and can result in severe loss of activity if addressed with chemical modification of RNA. Overall, these data indicate that the appropriate substitution of UNA in place of RNA, in a double-stranded RNA, maintains potent activity and could ultimately lead to effective protein down regulation with lower total doses and under conditions of greater specificity and safety.

Conformationally Restricted Nucleotides (CRN). CRNs are novel nucleotide analogs in which the flexible ribose sugar is locked into a rigid conformation by a small chemical linker. By restricting the flexibility of the ribose ring, CRNs can impart a helix-type structure typically found in naturally occurring RNA. For single stranded oligonucleotide therapeutics, the impact of CRN substitution dramatically increases the therapeutics’ affinity for the target mRNA or miRNA while imparting significant resistance to nuclease degradation. Additionally, CRNs significantly improve the thermal stability of duplexed constructs, such as siRNAs.

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Delivery. We have two lipid-based delivery platforms. The first platform utilizes amino-liposomal delivery technology and incorporates a novel and proprietary molecule we call DiLA² (Di-Alkylated Amino Acid). Our scientists designed this molecule based on amino acid (e.g., peptide/protein-based) chemistry. A DiLA²-based liposome has several potential advantages over other liposomes, such as: (1) a structure that may enable safe and natural metabolism by the body; (2) the ability to adjust liposome size, shape, and circulation time, to influence bio-distribution; and (3) the ability to attach molecules that can influence other delivery-related attributes such as targeting and cellular uptake. Our siRNA formulations using different members of the DiLA² family have demonstrated safe and effective delivery in rodents with metabolic targets (e.g., ApoB) and in cancer models using both local and systemic routes of administration. Safe and effective delivery with DiLA²-based formulations has also been achieved in non-human primates.

The second platform, SMARTICLES, defines a novel class of liposomes that are fully charge-reversible particles allowing delivery of active substance (siRNA, single-stranded oligonucleotides, etc.) inside the cell either by local or systemic administration. SMARTICLES are designed to ensure stable passage through the bloodstream and release of the nucleic acid payload within the target cell where it can exert its therapeutic effect by engaging either the RNAi pathway or directly with mRNA.

In addition to our lipid-based delivery platforms, we have used peptides for both the formation of stable siRNA nanoparticles as well as targeting moieties for siRNA molecules. Research includes the use of peptide technology to “condense” siRNAs into compact and potent nanoparticles; screening of our proprietary phage display library for targeting peptides; and internal discovery and development of peptides and other compounds recognized as having targeting or cellular uptake properties. The goal, in the use of such technologies, is to minimize the amount of final drug required to produce a therapeutic response by increasing the potency of the siRNA as well as directing more of the final drug product to the intended site of action.

tauRNAi Platform. tauRNA interference (tauRNAi) provides an avenue across potential biological barriers by incorporating our proprietary and highly effective DiLA²-based liposome and UsiRNA construct technologies into a single platform for RNAi. By merging the two technologies, we are able to tailor both UsiRNA construct and DiLA²-based liposome characteristics to target specific tissues and diseases resulting from over expression of proteins in those tissues. Maximal therapeutic effect can result from optimization of the UsiRNA through strategic placement of UNAs and CRNs thus providing stability to nucleases, mitigation of cytokine responses, and reduction of off-target effects, while maintaining exceptional activity against the intended target. Appropriate choice of the DiLA² molecule enables the optimization of charge, size, and other characteristics of the liposome for delivery to a particular tissue or tumor type. Further improvements can arise from the selection of liposome components as well as the manufacturing processes for the drug product.

TransKingdom RNA™ interference (tkRNAi) platform. tkRNAi is a broad-reaching platform that can be used to develop highly specific drug products for a diverse set of diseases. The tkRNAi platform involves the modification of bacteria to deliver short-hairpin RNA (shRNA) to cells of the intestinal tract. A significant advantage of the tkRNAi platform is oral (by mouth) delivery making this platform extremely patient friendly while harnessing the full potential of the RNAi process. The tkRNAi platform has demonstrated in vivo mRNA down regulation of both inflammatory and cancer targets thus providing a unique opportunity to develop RNAi-based therapeutics against such diseases as Crohn’s Disease, ulcerative colitis and colon cancer. The tkRNAi platform produced CEQ508 which is currently in clinical development for the treatment of Familial Adenomatous Polyposis.

Clinical Program. CEQ508 is being developed for the treatment of Familial Adenomatous Polyposis (FAP), a hereditary condition that occurs in approximately 1:10,000 persons worldwide. FAP is caused by mutations in the Adenomatous Polyposis Coli (APC) gene. As a result of these mutations, epithelial cells lining the intestinal tract have increased levels of the protein ß-catenin, which in turn, results in uncontrolled cell growth. Proliferation (uncontrolled cell growth) of the epithelial cells results in the formation of numerous (hundreds to thousands) non-cancerous growths (polyps) throughout the large intestine. By age 35, 95% of individuals with

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FAP have developed polyps and most will experience adverse effects including increased risk of bleeding and the potential for anemia. In more severe cases, obstruction of the intestines, abdominal pain, and severe bouts of diarrhea or constipation can occur. FAP patients are also at an increased risk of various cancers but specifically colon cancer. If measures are not taken to prevent the formation of polyps or to remove the polyps, nearly 100% of FAP patients will develop colon cancer. For many patients, complete colectomy (surgical removal of the entire large intestine), usually performed in the late teenage years or early twenties, is the only viable option for treatment. However, surgical intervention is not curative as the risk of polyps forming in the remaining portions of the intestinal tract and in the small intestine continues after colectomy.

CEQ508 is the first drug candidate in a novel class of therapeutic agents utilizing the tkRNAi platform and the first orally administered RNAi-based therapeutic. CEQ508 comprises attenuated bacteria that are engineered to enter into dysplastic tissue and release a payload of short-hairpin RNA (shRNA), a mediator in the RNAi pathway. The shRNA targets the mRNA of ß-catenin, which is known to be dysregulated in classical FAP. CEQ508 is being developed as an orally administered treatment to reduce the levels of ß-catenin protein in the epithelial cells of the small and large intestine. Upon enrollment in the phase 1b/2a clinical trial, patients will be placed in one of four dose-escalating cohorts. Following completion of the dose escalation phase, the trial plan calls for a stable-dose phase in which patients will receive the highest safe dose. CEQ508 will be administered daily in an oral suspension for 28 consecutive days.

The FDA granted orphan drug designation to CEQ508 for the treatment of FAP. Orphan drug designation entitles Marina Biotech to seven years of marketing exclusivity for CEQ508 for the treatment of FAP upon regulatory approval, as well as the opportunity to apply for grant funding from the U.S. government to defray costs of clinical trial expenses, tax credits for clinical research expenses and potential exemption from the FDA’s prescription drug application fee.

Market for Familial Adenomatous Polyposis (FAP) Therapeutics

FAP is a hereditary, precancerous condition that occurs in approximately 1:10,000 persons worldwide for which there is no generally acceptable pharmaceutical treatment option and for which surgical resection – a colectomy – is the only viable option for treatment. However, even with surgical intervention, the risk of developing extra-colonic tumors remains very high. The goal of a therapeutic approach is to prevent or delay the rapid disease progression. FAP manifests itself in early teens with the appearance of hundreds to thousands of polyps in the colorectal region of intestines, which have a high rate of carcinoma transformation. By age 35, 95% of individuals with FAP have developed polyps. Without surgical intervention, the mean age of colon cancer onset is 39 years of age. Most people with the genetic condition are in registries maintained in clinics and state institutions. Based on limited prevalence data we believe the U.S. FAP patient population is approximately 40,000 patients.

Market for Bladder Cancer Therapeutics

Bladder cancer is the 4^th most common cancer in men and 9^th most common in women in the U.S., making this disease the 5^th most common cancer overall in the U.S. Estimated new cases and deaths in 2009 were approximately 71,000 and 14,000, respectively. Bladder cancer has a similar incidence throughout the world, with estimates of 350,000 new patients each year. The majority of cases, approximately 70%, are classified as non-muscle invasive disease in which the tumor is confined to the cells (urothelium) and immediate supporting structures lining the interior of the bladder. Surgical resection of tumors is the primary therapy for non-muscle invasive bladder cancer and long-term survival rates are quite high compared to many other cancers. However, surgery is not curative with 50% to 70% of patients having recurrence of disease and 10% to 50% having progression to more severe disease. The combination of long-term survival but persistent monitoring for recurrence or progression renders bladder cancer one of the most expensive cancers on a cost per patient basis and one of the most expensive cancers in terms of total health care expenditures.

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Market for Malignant Ascites

Malignant ascites, or malignancy related ascites, occurs when fluid accumulates in the abdomen as a result of cancer; most prevalent in ovarian, pancreatic and gastric cancers. Ascites results from an imbalance in fluid production and resorption, generally occurs in the late stage of the disease and has a significant impact on quality of life. Current therapeutic options are limited to palliative care, focused primarily on fluid management. Nucleic acid-based therapeutics provide an opportunity to treat the underlying causes of malignant ascites. The National Cancer Institute estimates that approximately 21,000 ovarian, 40,000 pancreatic and 21,000 gastric cancers will be diagnosed in 2010. It is estimated that the prevalence of malignant ascites is 38%, 21% and 18% respectively, for each of these cancers.

RNAi Partnering and Licensing Agreements

Our business strategy is to enter into collaborations and strategic partnerships with pharmaceutical and biotechnology companies to: (1) generate revenue and non-dilutive financing; (2) gain access to technical resources or intellectual property (IP); and (3) validate our drug discovery platform.

Debiopharm — In February 2011, we entered into a Research and License Agreement (the “Agreement”) with Debiopharm S.A., a Swiss corporation (“Debiopharm”), pursuant to which we granted to Debiopharm an exclusive license to develop and commercialize our pre-clinical program in bladder cancer, for all uses in humans and animals for the prevention and treatment of superficial (non-muscle invasive) bladder cancer, in consideration of the payment by Debiopharm to us of up to $25 million based on predefined research and development milestones, royalties from the sales of products resulting under the Agreement and sublicensing payments. Among other things, the Agreement provides for certain licenses of our UsiRNA and liposomal delivery technologies. Debiopharm will have full responsibility for the development and commercialization of any products arising from the partnership, and will fund all of our research and development costs for the bladder cancer program beginning in February 2011.

Valeant Pharmaceuticals. — In March 2010, we acquired intellectual property related to Conformationally Restricted Nucleotides (CRN) from Valeant Pharmaceuticals North America in consideration of payment of a non-refundable licensing fee of $0.5 million due in equal portions in April and July 2010, which were included in research and development expense in 2010 and have been paid in full. Subject to meeting of certain milestones triggering the obligation to make any such payments, we may be obligated to make a product development milestone payment of $5.0 million within 180 days of FDA approval of a New Drug Application for our first CRN related product and another product development milestone payment of $2.0 million within 180 days of FDA approval of a New Drug Application covering our second CRN related product. As of December 31, 2010, we have not made, and are not under any current obligation to make, any such milestone payments, as the conditions triggering any such milestone payment obligations have not been satisfied. Valeant is entitled to receive earn-outs in the low single digits based upon future commercial sales and earn-outs in the low double digits based upon future revenue from sublicensing. Under the agreement we are required to use commercially reasonable efforts to develop and commercialize at least one covered product. If we have not made earn-out payments of at least $5.0 million prior to the sixth anniversary of the date of the agreement, we are required to pay Valeant an annual amount equal to $50,000 per assigned patent which shall be creditable against other payment obligations. The term of our financial obligations under the agreement shall end, on a country-by-country basis, when there is no longer any valid claim in such country. We may terminate the agreement upon 30 days’ notice, or upon 10 days’ notice in the event of adverse results from clinical studies. Upon termination, we are obligated to make all payments accrued as of the effective date of such termination but shall have no future payment obligations.

Novosom — In July 2010, we entered into an agreement pursuant to which we acquired the intellectual property of Novosom AG (“Novosom”) of Halle, Germany for Novosom’s SMARTICLES^® liposomal-based delivery system, which significantly broadens the number of approaches we may take for systemic and local

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delivery of our proprietary UsiRNA therapeutics. We issued an aggregate of 1,419,487 shares of our common stock to Novosom as consideration for the acquired assets. The shares had an aggregate value equal to approximately $3.8 million, which was recorded as research and development expense. As additional consideration for the acquired assets, we will pay to Novosom an amount equal to 30% of the value of each upfront (or combined) payment actually received by us in respect of the license of liposomal-based delivery technology or related product or disposition of the liposomal-based delivery technology by us, up to a maximum of $3.3 million, which amount will be paid in shares of our common stock, or a combination of cash and shares of our common stock, at our discretion.

Roche — In February 2009, we entered into an agreement with F. Hoffmann-La Roche Inc., a New Jersey corporation, and F. Hoffmann-La Roche Ltd., a Swiss corporation (collectively, “Roche”), pursuant to which we granted to Roche a worldwide, irrevocable, non-exclusive license to a portion of our technology platform, for the development of RNAi-based therapeutics, in consideration of the payment of a one-time, non-refundable licensing fee of $5.0 million. No additional royalties are payable to us under the agreement. The agreement will expire on a country-by-country basis upon the expiration date of the last to expire of the licensed patents in such country. Either party may terminate the agreement for material breach by the other party (subject to a 30-day cure period), or upon certain events involving the bankruptcy or insolvency of the other party. We believe this agreement represents strong third-party validation of the siRNA construct aspect of our RNAi drug discovery platform.

Novartis — In March 2009, we entered into an agreement with Novartis Institutes for BioMedical Research, Inc. (“Novartis”), pursuant to which we granted to Novartis a worldwide, non-exclusive, irrevocable, perpetual, royalty-free, fully paid-up license, with the right to grant sublicenses, to our DiLA² -based siRNA delivery platform in consideration of a one-time, non-refundable fee of $7.25 million, which was recognized as license fee revenue in 2009. Novartis may terminate this agreement immediately upon written notice to us. We believe this agreement represents strong third-party validation of the siRNA delivery aspect of our RNAi drug discovery platform. Additionally, we entered into a separate agreement with Novartis to provide them with an exclusive period in which to negotiate a potential research and development collaboration as well as possible broader licensing rights related to our RNAi drug delivery platform. This exclusive period expired in 2009. Approximately $0.3 million was recognized as license fee revenue in 2009 under this separate agreement.

University of Michigan — In May 2008, we entered into an exclusive license agreement to IP from the University of Michigan covering cationic peptides for enhanced delivery of nucleic acids. These peptides have unique characteristics that we believe play an important role in improving the efficacy of delivery of RNAi-based therapeutics. We are currently using these peptides to create siRNA nanoparticles to enhance mRNA knockdown. Together with the DiLA² technology, these delivery peptides may improve the therapeutic potential of our drug candidates. In connection with the agreement, we paid a license issue fee of $120,000, which was paid in full in three equal installments. An additional fee of $25,000 is payable annually and creditable against royalty payments.

Subject to the meeting of certain milestones triggering the obligation to make any such payments, we may be obligated to make product development milestone payments of up to $425,000 in the aggregate for each product developed under a licensed patent under this agreement. As of December 31, 2010, we have not made, and are not under any current obligation to make, any such milestone payments, as the conditions triggering any such milestone payment obligations have not been satisfied. The royalty payment required to be made by us to the University of Michigan under this agreement is a percentage of net sales in the low single digits.

We sublicensed the IP under this agreement to Novartis on a nonexclusive basis in March 2009, at which time we paid an additional one–time fee of $362,500 to the University of Michigan, which eliminated the obligation to pay the University of Michigan any future royalties or milestones with respect to the Novartis sublicense. This fee was included in research and development expense.

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This agreement will terminate on the expiration date of the last to expire patent licensed under the agreement, which expiration date is in 2019. Under the agreement, we agreed to use diligent and commercially reasonable efforts to exploit the patent rights and bring licensed products to market. If we fail to meet certain research and development milestones, the University of Michigan may terminate the agreement subject to a thirty day cure period. In addition, the University of Michigan may terminate this license upon written notice if the first commercial sale of a product does not occur on or before May 2017. We may terminate this agreement at any time upon ninety days written notice.

University of Helsinki — In June 2008, we entered into a collaboration agreement with Dr. Pirjo Laakkonen and the Biomedicum Helsinki. The goal of the work involves our patented phage display library, the Trp Cage library, for the identification of peptides to target particular tissues or organs for a given disease. In December 2009, we received a patent allowance in the US covering a targeting peptide for preferential delivery to lung tissues that was identified by us using the Trp Cage Library. We believe the Trp Cage library will be a source of additional peptides for evaluation in our delivery programs, and we will have a strong IP position for these peptides and their use. In 2010, we extended the term of the agreement and it will now terminate in June 2012. Either party may terminate the agreement for material breach by the other party, subject to a 30-day cure period.

Under this agreement, we may be obligated to make product development milestone payments of up to €275,000 in the aggregate for each product developed under this research agreement if certain milestones are met. As of December 31, 2010, we have not made, and are not under any current obligation to make, any such milestone payments, as the conditions that would trigger any such milestone payment obligations have not been satisfied. In addition, upon the first commercial sale of a product, we are required to pay an advance of €250,000 against which future royalties will be credited. The percentage royalty payment required to be made by us to the University of Helsinki under the terms of this agreement is a percentage of gross revenues derived from work performed under the Helsinki Agreement in the low single digits.

Ribotask ApS — In June 2009, we announced the revision of the October 2008 agreement in which we had acquired the intellectual property related to Unlocked Nucleobase Analogs (UNA) from Ribotask ApS, a privately held Danish company. The original agreement provided us with exclusive rights for the development and commercialization of therapeutics incorporating UNAs. The amended agreement eliminated our obligation to pay all milestone and royalty payments and provided full financial and transactional control of our proprietary UNA technology. Our UsiRNA construct has been verified in multiple cell types and in vivo models to be highly potent and efficacious for RNAi. Substitution of UNA within siRNA, creating the UsiRNA construct, has been shown to provide greater target specificity. We believe this proprietary construct provides unique advantages for RNAi-based therapeutics and is an essential part of our business strategy and ultimate success.

In June 2010, we expanded our rights under the previous agreement with Ribotask to include exclusive rights to the development and commercialization of UNA-based diagnostics. In connection with this amendment, we agreed to pay Ribotask $750,000 in three equal payments of $250,000 each. In March 2011, we amended the agreement with Ribotask to change the payment terms for the diagnostic rights. The first payment of $250,000 was made in November 2010. The remaining payments will be made as follows: a payment of $50,000 at execution of the amendment with the remaining $400,000 to be paid in eight monthly payments of $50,000 beginning May 1, 2011. In addition we issued 113,766 shares of our common stock valued at approximately $80,000 to Ribotask on March 3, 2011; for which we filed a resale registration statement on Form S-3 on March 14, 2011.

Under the October 2008 agreement we made payments to Ribotask totaling $500,000. We sublicensed the IP under this agreement to Roche on a nonexclusive basis in February 2009, at which time we paid an additional $250,000 to Ribotask, which eliminated the obligation to pay Ribotask future royalties or milestones with respect to the Roche sublicense. In connection with the June 2009 amendment, we issued 151,515 shares of our common stock valued at approximately $1.0 million to Ribotask ApS and agreed to pay $1.0 million in four installments of $250,000 each due at various intervals through July 2010.

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In connection with our agreements, as amended, we granted Ribotask a royalty-bearing, world-wide exclusive license to use the assigned patents to develop and sell products intended solely for use as reagents or for testing. The royalty rates to be paid to us by Ribotask are in the low single digits and to date we have not recognized any revenue under this agreement, as amended.

With the newly acquired exclusive rights to UNA technology combined with the exclusive rights to Conformationally Restricted Nucleotide (CRN) technology for both therapeutics and diagnostics acquired in March 2010 from Valeant Pharmaceuticals, we have established one of the few intellectual property portfolios supporting a nucleic acid-based personalized medicine platform with the ability to pursue proprietary nucleic acid-based therapeutics and diagnostics.

University of British Columbia — In November 2009, we expanded and extended a previous agreement established in 2008 with University of British Columbia/Vancouver Prostate Centre (VPC) in the area of bladder cancer. The VPC is a National Centre for Excellence for translational research and this agreement provides us access to cutting-edge bladder cancer models and evaluation techniques and interactions with world-renowned researchers and clinicians. Data derived from studies conducted under this agreement have already demonstrated the potency of UsiRNAs and DiLA² -based delivery for inhibition of target mRNA and reduction in tumor growth. The focus of the expanded agreement will be the evaluation of additional critical targets in bladder cancer and the therapeutic impact on tumor biology and growth. The research agreement requires that we make payments for work completed under an agreed work plan. Through December 31, 2010, we have recognized approximately $0.2 million as research and development expense under this agreement. The agreement may be terminated by either party with ninety days written notice. The current contract period has been extended and will now terminate November 30, 2011.

PROPRIETARY RIGHTS AND INTELLECTUAL PROPERTY

We rely primarily on patents and contractual obligations with employees and third parties to protect our proprietary rights. We have sought, and intend to continue to seek, appropriate patent protection for important and strategic components of our proprietary technologies by filing patent applications in the U.S. and certain foreign countries. There can be no assurance that any of our patents will guarantee protection or market exclusivity for our products and product candidates. We also use license agreements both to access external technologies and to convey certain intellectual property rights to others. Our financial success will be dependent in part on our ability to obtain commercially valuable patent claims and to protect our intellectual property rights and to operate without infringing upon the proprietary rights of others. As of March 14, 2011, we owned or controlled 70 issued or allowed patents, as described in the following table, and we also owned or controlled 54 pending U.S. patent applications, including provisional patent applications, to protect our RNAi proprietary technologies.

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The patents listed in the table above will expire in the United States generally between 2014 and 2028, subject to any potential patent term extensions and/or supplemental protection certificates that would extend the terms of the patents in countries where such extensions may become available.

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Our patents and patent applications are directed to compositions of matter, formulations, methods of use and/or methods of manufacturing, as appropriate. The patent positions of pharmaceutical and biotechnology companies, including ours, are generally uncertain and involve complex legal and factual questions. Our business could be negatively impacted by any of the following:

In addition, others may independently develop similar or alternative technologies, duplicate any of our technologies and, if patents are licensed or issued to us, design around the patented technologies licensed to or developed by us. Moreover, we could incur substantial costs in litigation if we have to defend ourselves in patent suits brought by third parties or if we initiate such suits.

COMPETITION

There are a growing number of biotechnology companies in this space and a few large pharmaceutical companies with internal programs. The competition includes companies focused on constructs (double-stranded {siRNA and miRNA mimetics} or single-stranded {antagomirs and translational inhibition oligonucleotides}) or delivery. However, we believe only a small number can claim a drug discovery platform (constructs and delivery), and only Marina Biotech is in the unique position of having multiple drug discovery platforms directed at multiple RNA-based therapeutic modalities and thereby have the ability to develop the most appropriate therapeutic for a specific undruggable target for a specific indication.

A sampling of competitors includes Alnylam Pharmaceuticals, Benitec, Dicerna Pharmaceuticals, Quark Pharmaceuticals, Regulus, RXi Pharmaceuticals, Silence Therapeutics, and Tekmira Pharmaceuticals. The pharmaceutical companies with internal oligonucleotide R&D programs include AstraZeneca, GlaxoSmithKline, Novartis and Merck.

Universities and public and private research institutions are also potential competitors. While these organizations primarily have educational objectives, they may develop proprietary technologies related to the drug delivery field or secure protection that we may need for development of our technologies and products. We may attempt to license one or more of these proprietary technologies, but these licenses may not be available to us on acceptable terms, if at all.

Some of our competitors have substantially greater resources and experience, manufacturing capabilities, regulatory expertise, sales and marketing resources, and established collaborative arrangements with pharmaceutical companies. Our competitors, either alone or with their collaboration partners, may succeed in developing product candidates that are similar or preferable in effectiveness, safety, cost and ease of commercialization, and our competitors may obtain IP protection or commercialize competitive products sooner than we do.

LEGACY INTRANASAL TECHNOLOGIES AND THERAPEUTICS

Our efforts to divest and monetize our legacy nasal drug delivery programs and capabilities including:

Cypress Bioscience, Inc. — In August 2010 we entered into an Asset Purchase Agreement with Cypress Bioscience, Inc. (“Cypress”) under which Cypress acquired our patent rights and technology related to

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carbetocin, a long-acting analog of oxytocin, a naturally produced hormone that may benefit individuals with autism. Under the agreement, we received an upfront payment of $750,000 and we could receive milestone payments up to $27 million. Cypress will be responsible for all future development and IP related expenses. In addition, Cypress will pay us royalties, in the single digits, on commercial sales.

Par Pharmaceutical — In 2009 we entered into an Asset Purchase Agreement with Par Pharmaceutical (“Par”) pursuant to which, among other things, we were entitled to receive earn-out payments for five years based on commercial sales of calcitonin. In December 2010, we entered into an amendment of the Asset Purchase Agreement under which Par agreed to pay us a lump-sum cash payment of $700,000 in lieu of profit sharing for the remainder of the earn-out payment period, which we recognized as revenue in 2010.

GOVERNMENT REGULATION

Government authorities in the U.S. and other countries extensively regulate the research, development, testing, manufacture, labeling, promotion, advertising, distribution and marketing, among other things, of drugs and biologic products. All of our foreseeable product candidates are expected to be regulated as drug products.

In the U.S., the FDA regulates drug products under the Federal Food, Drug and Cosmetic Act (the “FDCA”), and other laws within the Public Health Service Act. Failure to comply with applicable U.S. requirements, both before and after approval, may subject us to administrative and judicial sanctions, such as a delay in approving or refusal by the FDA to approve pending applications, warning letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, and/or criminal prosecutions. Before our drug products are marketed they must be approved by the FDA. The steps required before a novel drug product is approved by the FDA include: (1) pre-clinical laboratory, animal, and formulation tests; (2) submission to the FDA of an Investigational New Drug Application (“IND”) for human clinical testing, which must become effective before human clinical trials may begin; (3) adequate and well-controlled clinical trials to establish the safety and effectiveness of the product for each indication for which approval is sought; (4) submission to the FDA of an New Drug Application (“NDA”); (5) satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the drug product is produced to assess compliance with cGMP; and FDA review and finally (6) approval of an NDA.

Pre-clinical tests include laboratory evaluations of product chemistry, toxicity and formulation, as well as animal studies. The results of the pre-clinical tests, together with manufacturing information and analytical data, are submitted to the FDA as part of an IND, which must become effective before human clinical trials may begin. An IND will automatically become effective 30 days after receipt by the FDA, unless before that time the FDA raises concerns or questions, such as the conduct of the trials as outlined in the IND. In such a case, the IND sponsor and the FDA must resolve any outstanding FDA concerns or questions before clinical trials can proceed. There can be no assurance that submission of an IND will result in FDA authorization to commence clinical trials. Once an IND is in effect, each clinical trial to be conducted under the IND must be submitted to the FDA, which may or may not allow the trial to proceed.

Clinical trials involve the administration of the investigational drug to human subjects under the supervision of qualified physician-investigators and healthcare personnel. Clinical trials are typically conducted in three defined phases, but the phases may overlap or be combined. Phase 1 usually involves the initial administration of the investigational drug or biologic product to healthy individuals to evaluate its safety, dosage tolerance and pharmacodynamics. Phase 2 usually involves trials in a limited patient population, with the disease or condition for which the test material is being developed, to evaluate dosage tolerance and appropriate dosage; identify possible adverse side effects and safety risks; and preliminarily evaluate the effectiveness of the drug or biologic for specific indications. Phase 3 trials usually further evaluate effectiveness and test further for safety by administering the drug or biologic candidate in its final form in an expanded patient population. Our product development partners, the FDA, or we may suspend clinical trials at any time on various grounds, including any situation where we believe that patients are being exposed to an unacceptable health risk or are obtaining no medical benefit from the test material.

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Assuming successful completion of the required clinical testing, the results of the pre-clinical trials and the clinical trials, together with other detailed information, including information on the manufacture and composition of the product, are submitted to the FDA in the form of an NDA requesting approval to market the product for one or more indications. Before approving an application, the FDA will usually inspect the facilities where the product is manufactured, and will not approve the product unless cGMP compliance is satisfactory. If the FDA determines the NDA is not acceptable, the FDA may outline the deficiencies in the NDA and often will request additional information. If the FDA approves the NDA, certain changes to the approved product, such as adding new indications, manufacturing changes or additional labeling claims are subject to further FDA review and approval. The testing and approval process requires substantial time, effort and financial resources, and we cannot be sure that any approval will be granted on a timely basis, if at all. Under the Orphan Drug Act, the FDA may grant orphan drug designation to a drug intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the United States, or more than 200,000 individuals in the U.S. and for which there is no reasonable expectation that the cost of developing and making available in the U.S. a drug for this type of disease or condition will be recovered from sales in the U.S. for that drug. Orphan drug designation must be requested before submitting an NDA. After the FDA grants orphan drug designation, the identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. If a product that has orphan drug designation subsequently receives the first FDA approval for the disease for which it has such designation, the product is entitled to orphan product exclusivity, which means that the FDA may not approve any other applications, including a full BLA, to market the same drug for the same indication, except in very limited circumstances, for seven years. The FDA granted orphan drug designation to CEQ508 for the treatment of FAP in December 2010.

In addition, regardless of the type of approval, we and our partners are required to comply with a number of FDA requirements both before and after approval. For example, we are required to report certain adverse reactions and production problems, if any, to the FDA, and to comply with certain requirements concerning advertising and promotion for our products. In addition, quality control and manufacturing procedures must continue to conform to cGMP after approval, and the FDA periodically inspects manufacturing facilities to assess compliance with cGMP. Accordingly, manufacturers must continue to expend time, money and effort in all areas of regulatory compliance, including production and quality control to comply with cGMP. In addition, discovery of problems, such as safety problems, may result in changes in labeling or restrictions on a product manufacturer or NDA holder, including removal of the product from the market.

PRODUCT LIABILITY

We currently have product liability insurance coverage for CEQ508 in the amount of $5 million per occurrence and a $5 million aggregate limitation, subject to a deductible of $10,000 per occurrence, with an aggregate deductible of $50,000. To satisfy our agreement with Par, we were required to maintain product liability coverage at a $5 million level until February 2011 and for Merck & Co., we were required to maintain such coverage at a $20 million level until March 2011. To satisfy these requirements we have purchased extended reporting period coverage, in the amount of $20 million per occurrence with a $20 million aggregate limitation, subject to a deductible of $25,000 per occurrence. This coverage is only for products tested, manufactured or marketed prior to December 1, 2008, and only for claims reported until March 1, 2011.

ENVIRONMENTAL COMPLIANCE

Our research and development activities involve the controlled use of potentially harmful biological materials as well as hazardous materials, chemicals and various radioactive compounds. We are subject to federal, state and local laws and regulations governing the use, storage, handling and disposal of these materials and specific waste products. We are also subject to numerous environmental, health and workplace safety laws and regulations, including those governing laboratory procedures, exposure to blood-borne pathogens and the handling of bio-hazardous materials. The cost of compliance with these laws and regulations could be significant and may adversely affect capital expenditures to the extent we are required to procure expensive capital equipment to meet regulatory requirements.

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EMPLOYEES

As of March 15, 2011, we had 45 full-time employees, of which approximately 30 are engaged in R&D, and the others are engaged in support functions including finance, administration, information technology, human resources, business development, corporate and investor relations and legal affairs. None of our employees is covered by a collective bargaining agreement.

COMPANY INFORMATION

We are a reporting company and file annual, quarterly and current reports, proxy statements and other information with the SEC. You may read and copy these reports, proxy statements and other information at the SEC’s Public Reference Room at 100 F Street N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 or e-mail the SEC at publicinfo@sec.gov for more information on the operation of the public reference room. Our SEC filings are also available at the SEC’s website at http://www.sec.gov. Our Internet address is http://www.marinabio.com. There we make available, free of charge, our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and any amendments to those reports, as soon as reasonably practicable after we electronically file such material with, or furnish such material to, the SEC.

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Risks Relating to being an Early State Drug Development Company and Managing Growth

We have no history of profitability and there is a potential for fluctuation in operating results.

We have experienced significant operating losses since inception and have an accumulated deficit of $290.8 million at December 31, 2010. In the third quarter of 2008 we suspended all research and clinical development of our intranasal programs and incurred a restructuring charge to exit a facility which was used primarily for our intranasal activities. As of September 30, 2008, our accumulated deficit, which was primarily related to clinical development of our intranasal programs, was approximately $241.8 million. We currently have no revenues from product sales and will not have any such revenues unless and until a marketable product is successfully developed, receives regulatory approvals, and is successfully manufactured and distributed to the market. We expect to continue to experience losses for the foreseeable future. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Forward-Looking Statements”.

We are developing products based on RNA interference technology. The process of developing such products requires significant research and development efforts, including basic research, pre-clinical and clinical development, and regulatory approval. These activities, together with our sales, marketing, general and administrative expenses, have resulted in operating losses in the past, and there can be no assurance that we can achieve profitability in the future. Our ability to achieve profitability depends on our ability, alone or with our collaborators, to develop our drug candidates, conduct pre-clinical development and clinical trials, obtain necessary regulatory approvals, and manufacture, distribute, market and sell our drug products. We cannot assure you that we will be successful at any of these activities or predict if or when we will ever become profitable.

We do not generate operating income and will require additional financing in the future. If additional capital is not available, we may have to curtail or cease operations.

Our business currently does not generate the cash that is necessary to finance our operations. We incurred net losses of approximately $8.0 million in 2009 and $27.8 million in 2010. Subject to the success of our research and development programs and potential licensing or partnering transactions, we will need to raise significant additional capital to:

Our future capital needs depend on many factors, including:

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We believe that our existing cash and cash equivalents should be sufficient to fund our operations into the second quarter of 2011. We may seek to raise necessary funds through public or private equity offerings, debt financings or additional strategic alliances and licensing arrangements. We may not be able to obtain additional financing on terms favorable to us, if at all. General market conditions may make it very difficult for us to seek financing from the capital markets, and the terms of any financing may adversely affect the holdings or the rights of our stockholders. For example, if we raise additional funds by issuing equity securities, further dilution to our stockholders will result. In addition, as a condition to providing additional funds to us, future investors may demand, and may be granted, rights superior to those of existing stockholders. Debt financing, if available, may involve restrictive covenants that could limit our flexibility in conducting future business activities and, in the event of insolvency, would be paid before holders of equity securities received any distribution of corporate assets. We may be required to relinquish rights to our technologies or drug candidates, or grant licenses on terms that are not favorable to us, in order to raise additional funds through alliance, joint venture or licensing arrangements. If adequate funds are not available, we may have to delay, reduce or eliminate one or more of our research or development programs or reduce overall overhead expenses. These actions would likely reduce the market price of our common stock.

Our independent registered public accounting firm has expressed substantial doubt about our ability to continue as a going concern.

Our independent registered public accounting firm, in its audit opinion issued in connection with our consolidated balance sheets as of December 31, 2010 and 2009 and our consolidated statements of operations, stockholders’ equity (deficit) and cash flows for the years ended December 31, 2010 and 2009, has expressed substantial doubt about our ability to continue as a going concern given our net losses, accumulated deficit and negative cash flows. The accompanying consolidated financial statements were prepared on the basis of a going concern, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business, and accordingly do not contain any adjustments which may result due to the outcome of this uncertainty.

If we lose our key personnel, or if we are unable to attract and retain additional personnel, then we may be unable to successfully develop our business.

If we are unable to retain one or more of our executive officers, including J. Michael French, our President and Chief Executive Officer, Peter S. Garcia, our Chief Financial Officer and Secretary, Dr. Barry Polisky, our Chief Scientific Officer, or any of our other key managers or key technical personnel, our business could be seriously harmed. We have entered into employment agreements with Messrs. French and Garcia and with Dr. Polisky. Whether or not a member of management has executed an employment agreement, there can be no assurance that we will be able to retain our key managers or key technical personnel or replace any of them if we lose their services for any reason. Although we make a significant effort and allocate substantial resources to recruit candidates, competition for competent managers and technical personnel is intense. Failure to attract and retain our key personnel may compromise our ability to negotiate and enter into additional collaborative arrangements, delay our ongoing discovery research efforts, delay pre-clinical or clinical testing of our product candidates, delay the regulatory approval process or prevent us from successfully commercializing our product candidates. In addition, if we have to replace any of these individuals, we may not be able to replace knowledge that they have about our operations.

We may encounter difficulties managing our growth, which could adversely affect our business.

We currently have approximately 45 full-time-equivalent employees, and we expect that as we seek to increase the number of product candidates we are developing we will need to expand our operations in the future. If our business grows, it may place a strain on us, our management and our resources. Our ability to effectively manage our operations, relationships, growth and various projects requires us to continue to improve our operational, financial and management controls, and our reporting systems and procedures, and to attract and

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retain sufficient numbers of talented employees. We may not be able to successfully implement these tasks on a larger scale and, accordingly, we may not achieve our research, development and commercialization goals. If we do not improve our operational, financial and management information systems, or fail to effectively monitor or manage our growth, our business could suffer significantly.

If we make strategic acquisitions, we will incur a variety of costs and might never realize the anticipated benefits.

Despite our acquisition of Cequent Pharmaceuticals, Inc. in July 2010, we have limited experience in independently identifying acquisition candidates and integrating the operations of acquisition candidates with our company. If appropriate opportunities become available, we might attempt to acquire approved products, additional drug candidates, technologies or businesses that we believe are a strategic fit with our business. If we pursue any transaction of that sort, the process of negotiating the acquisition and integrating an acquired product, drug candidate, technology or business might result in operating difficulties and expenditures and might require significant management attention that would otherwise be available for ongoing development of our business, whether or not any such transaction is ever consummated. Moreover, we might never realize the anticipated benefits of any acquisition. Future acquisitions could result in potentially dilutive issuances of equity securities, the incurrence of debt, contingent liabilities, or impairment expenses related to goodwill, and impairment or amortization expenses related to other intangible assets, which could harm our financial condition.

Failure of our internal control over financial reporting could harm our business and financial results.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is a process to provide reasonable assurance regarding the reliability of financial reporting for external purposes in accordance with accounting principles generally accepted in the United States. Internal control over financial reporting includes maintaining records that in reasonable detail accurately and fairly reflect our transactions; providing reasonable assurance that transactions are recorded as necessary for preparation of the financial statements; providing reasonable assurance that receipts and expenditures of our assets are made in accordance with management authorization; and providing reasonable assurance that unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements would be prevented or detected on a timely basis. Because of its inherent limitations, internal control over financial reporting is not intended to provide absolute assurance that a misstatement of our financial statements would be prevented or detected. Our growth and entry into new products, technologies and markets will place significant additional pressure on our system of internal control over financial reporting. Any failure to maintain an effective system of internal control over financial reporting could limit our ability to report our financial results accurately and timely or to detect and prevent fraud.

Our business and operations could suffer in the event of system failures.

Despite the implementation of security measures, our internal computer systems and those of our contractors and consultants are vulnerable to damage from computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. Such events could cause interruption of our operations. For example, the loss of pre-clinical trial data or data from completed or ongoing clinical trials for our product candidates could result in delays in our regulatory filings and development efforts and significantly increase our costs. To the extent that any disruption or security breach were to result in a loss of or damage to our data, or inappropriate disclosure of confidential or proprietary information, we could incur liability and the development of our product candidates could be delayed.

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Risks Related to the Development and Regulatory Approval of our Drug Candidates

RNAi-based drug development is unproven and may never lead to marketable products.

Our future success depends on the successful development of products based on RNAi technology. Neither we nor any other company has received regulatory approval to market therapeutics utilizing siRNAs. The scientific discoveries that form the basis for our efforts to discover and develop new siRNA drugs are relatively new. The scientific evidence to support the feasibility of developing drugs based on these discoveries is both preliminary and limited. Skepticism as to the feasibility of developing RNAi therapeutics has been expressed in scientific literature.

Relatively few product candidates based on RNAi technology have ever been tested in animals or humans, none of which have received regulatory approval. We currently have only limited data suggesting that we can introduce typical drug-like properties and characteristics into siRNAs, such as favorable distribution within the body or tissues or the ability to enter cells and exert their intended effects. In addition, RNA-based compounds may not demonstrate in patients the chemical and pharmacological properties ascribed to them in laboratory studies, and they may interact with human biological systems in unforeseen, ineffective or harmful ways. We may make significant expenditures trying to develop RNA-based technologies without success. As a result, we may never succeed in developing a marketable product. If we do not successfully develop and commercialize drugs based upon our RNA-based drug candidates, we may not become profitable and the value of our common stock will likely decline.

Further, our focus solely on RNAi technology for developing drugs, as opposed to multiple, more proven technologies for drug development, increases the risks associated with the ownership of our common stock. If we are not successful in developing a product candidate using RNAi technology, we may be required to change the scope and direction of our product development activities. In that case, we may not be able to identify and implement successfully an alternative product development strategy.

All of our programs, other than our program for CEQ508, are in pre-clinical studies or early stage research. If we are unable to develop and commercialize our product candidates, our business will be adversely affected.

A key element of our strategy is to discover, develop and commercialize a portfolio of new products. We are seeking to do so through our internal research programs and intend to explore strategic collaborations for the development of new products. Whether or not any product candidates are ultimately identified, research programs to identify new disease targets and product candidates require substantial technical, financial and human resources. Our research programs may initially show promise in identifying potential product candidates, yet fail to yield a successful commercial product for many reasons, including the following:

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Upon entering into clinical trials, clinical trials of our product candidates would be expensive and time-consuming, and the results of any of these trials would be uncertain.

Our research and development programs are at an early stage. Before obtaining regulatory approval for the sale of our product candidates, we must conduct, at our own expense, extensive pre-clinical tests and clinical trials to demonstrate the safety and efficacy in humans of our product candidates. Pre-clinical and clinical testing in patients is a long, expensive and uncertain process, and the historical failure rate for product candidates is high. The length of time generally varies substantially according to the type of drug, complexity of clinical trial design, regulatory compliance requirements, intended use of the drug candidate and rate of patient enrollment for the clinical trials.

A failure of one or more of our pre-clinical studies or clinical trials can occur at any stage of testing. We may experience numerous unforeseen events during, or as a result of, the pre-clinical testing and the clinical trial process that could delay or prevent our ability to receive regulatory approval or potentially commercialize our product candidates, including:

Further, even if the results of our pre-clinical studies or clinical trials are initially positive, it is possible that we will obtain different results in the later stages of drug development or that results seen in clinical trials will not continue with longer term treatment. Drugs in late stages of clinical development may fail to show the desired safety and efficacy traits despite having progressed through initial clinical testing. For example, positive results in early Phase 1 or Phase 2 clinical trials may not be repeated in larger Phase 2 or Phase 3 clinical trials. All of our potential drug candidates are prone to the risks of failure inherent in drug development. The clinical trials of any or all of our drugs or drug candidates could be unsuccessful, which would prevent us from commercializing these drugs. The FDA conducts its own independent analysis of some or all of the pre-clinical and clinical trial data submitted in a regulatory filing and often comes to different and potentially more negative conclusions than the analysis performed by the drug sponsor. Our failure to develop safe, commercially viable

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drugs approved by the FDA would substantially impair our ability to generate revenues and sustain our operations and would materially harm our business and adversely affect our stock price. In addition, significant delays in pre-clinical studies and clinical trials will impede our ability to seek regulatory approvals, commercialize our drug candidates and generate revenue, as well as substantially increase our development costs.

Even if we obtain regulatory approvals, our marketed drugs will be subject to ongoing regulatory review. If we fail to comply with continuing U.S. and foreign regulations, we could lose our approvals to market drugs and our business would be materially adversely affected.

Following any initial FDA or foreign regulatory approval of any drugs we may develop, we will also be subject to continuing regulatory review, including the review of adverse drug experiences and clinical results that are reported after our drug products are made available to patients. This would include results from any post marketing tests or vigilance required as a condition of approval. The manufacturer and manufacturing facilities we use to make any of our drug candidates will also be subject to periodic review and inspection by regulatory authorities, including the FDA. The discovery of any new or previously unknown problems with the product, manufacturer or facility may result in restrictions on the drug or manufacturer or facility, including withdrawal of the drug from the market. Our product promotion, advertising and labeling also will be subject to regulatory requirements and continuing regulatory review. If we fail to comply with applicable continuing regulatory requirements, we may be subject to fines, suspension or withdrawal of regulatory approval, product recalls and seizures, operating restrictions and other adverse consequences.

We are subject to extensive U.S. and foreign government regulation, including the requirement of approval before our products may be manufactured or marketed.

We, our present and future collaboration partners, and the drug product candidates developed by us or in collaboration with partners are subject to extensive regulation by governmental authorities in the U.S. and other countries. Failure to comply with applicable requirements could result in, among other things, any of the following actions: warning letters, fines and other civil penalties, unanticipated expenditures, delays in approving or refusal to approve a product candidate, product recall or seizure, interruption of manufacturing or clinical trials, operating restrictions, injunctions and criminal prosecution.

Our product candidates cannot be marketed in the U.S. without FDA approval or clearance, and they cannot be marketed in foreign countries without applicable regulatory approval. Neither the FDA nor any foreign regulatory authority has approved any of our product candidates. Our product candidates are in pre-clinical and early clinical development, and will have to be approved by the FDA or applicable foreign regulatory authorities before they can be marketed in the U.S. or abroad. Obtaining regulatory approval requires substantial time, effort, and financial resources, and may be subject to both expected and unforeseen delays, including, without limitation, citizen’s petitions or other filings with the FDA, and there can be no assurance that any approval will be granted on a timely basis, if at all, or that delays will be resolved favorably or in a timely manner. If our product candidates are not approved in a timely fashion, or are not approved at all, our business and financial condition may be adversely affected. We, our present and future collaboration partners or the FDA may suspend or terminate human clinical trials at any time on various grounds, including a finding that the patients are being exposed to an unacceptable health risk.

In addition, both before and after regulatory approval, we, our collaboration partners and our product candidates are subject to numerous requirements by the FDA and foreign regulatory authorities covering, among other things, testing, manufacturing, quality control, labeling, advertising, promotion, distribution and export. These requirements may change and additional government regulations may be promulgated that could affect us, our collaboration partners or our product candidates. We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action, either in the U.S. or abroad. There can be no assurance that we will not be required to incur significant costs to comply with such laws and regulations in the future or that such laws or regulations will not have a material adverse effect upon our business.

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We use hazardous chemicals and biological materials in our business. Any disputes relating to improper use, handling, storage or disposal of these materials could be time-consuming and costly.

Our research and development operations involve the use of hazardous and biological, potentially infectious, materials. We are subject to the risk of accidental contamination or discharge or any resultant injury from these materials. Federal, state and local laws and regulations govern the use, manufacture, storage, handling and disposal of these materials and specific waste products. We could be subject to damages, fines or penalties in the event of an improper or unauthorized release of, or exposure of individuals to, these hazardous materials, and our liability could be substantial. The costs of complying with these current and future environmental laws and regulations may be significant, thereby impairing our business.

We are also subject to numerous environmental, health and workplace safety laws and regulations, including those governing laboratory procedures, exposure to blood-borne pathogens and the handling of biohazardous materials. We maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from the use of these materials. The limits of our workers’ compensation insurance are mandated by state law, and our workers’ compensation liability is capped at these state-mandated limits. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive materials. Additional federal, state and local laws and regulations affecting our operations may be adopted in the future. We may incur substantial costs to comply with, and substantial fines or penalties if we violate, any of these laws or regulations.

Failure to comply with foreign regulatory requirements governing human clinical trials and marketing approval for drugs could prevent us from selling our drug candidates in foreign markets, which may adversely affect our operating results and financial condition.

The requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement for marketing our drug candidates outside the U.S. vary greatly from country to country. We have limited experience in obtaining foreign regulatory approvals. The time required to obtain approvals outside the U.S. may differ from that required to obtain FDA approval. We may not obtain foreign regulatory approvals on a timely basis, if at all. Approval by the FDA does not ensure approval by regulatory authorities in other countries, and approval by one foreign regulatory authority does not ensure approval by regulatory authorities in other countries or by the FDA. Failure to comply with these regulatory requirements or obtain required approvals could impair our ability to develop foreign markets for our drug candidates and may have a material adverse effect on our financial condition or results of operations.

Risks Related to our Dependence on Third Parties

We may become dependent on our collaborative arrangements with third parties for a substantial portion of our revenue, and our development and commercialization activities may be delayed or reduced if we fail to initiate, negotiate or maintain successful collaborative arrangements.

We may become dependent on possible future collaborators to develop and commercialize many of our product candidates and to provide the regulatory compliance, sales, marketing and distribution capabilities required for the success of our business. If we fail to secure or maintain successful collaborative arrangements, our development and commercialization activities will be delayed, reduced or terminated, and our revenues could be materially and adversely impacted.

Over the next several years, we may depend on these types of collaboration partnerships for a significant portion of our revenue. The expected future milestone payments and cost reimbursements from collaboration agreements could provide an important source of financing for our research and development programs, thereby facilitating the application of our technology to the development and commercialization of our products. These collaborative agreements might be terminated either by us or by our partners upon the satisfaction of certain

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notice requirements. Our partners may not be precluded from independently pursuing competing products and drug delivery approaches or technologies. Even if our partners continue their contributions to our collaborative arrangements, of which there can be no assurance, they may nevertheless determine not to actively pursue the development or commercialization of any resulting products. Our partners may fail to perform their obligations under the collaborative arrangements or may be slow in performing their obligations. In addition, our partners may experience financial difficulties at any time that could prevent them from having available funds to contribute to these collaborations. If our collaboration partners fail to conduct their commercialization, regulatory compliance, sales and marketing or distribution activities successfully and in a timely manner, or if they terminate or materially modify their agreements with us, the development and commercialization of one or more product candidates could be delayed, curtailed or terminated because we may not have sufficient financial resources or capabilities to continue such development and commercialization on our own.

For example, in February 2011, we entered into an exclusive research and license agreement with Debiopharm S.A. concerning the development and commercialization of our pre-clinical program in bladder cancer, pursuant to which we and Debiopharm will work together to advance to market an RNAi-based therapy for the treatment of non-muscle invasive bladder cancer. Under the agreement, Debiopharm will have full responsibility for the development and commercialization of any products arising from the partnership, and will fund all of our research and development costs for the bladder cancer program beginning in February 2011. Debiopharm also agreed to pay to us up to $25 million based on predefined research and development milestones as well as royalties on the sales of products resulting from the partnership. If Debiopharn terminates this agreement or fails to perform its obligations thereunder, we may not be able to advance our bladder cancer program as scheduled, or at all. If that were to occur, we may not receive any revenues from our bladder cancer program or our agreement with Debiopharm, including any milestone or royalty payments.

An interruption in the supply of our raw and bulk materials needed for our product candidates could cause our product development to be slowed or stopped.

We currently obtain supplies of critical raw and bulk materials used in our research and development efforts from several suppliers. However, we do not have long-term contracts with any of these suppliers. While our existing arrangements supply sufficient quantities of raw and bulk materials needed to accomplish the current preclinical and clinical development of our product candidates, there can be no assurance that we would have the capability to manufacture sufficient quantities of our product candidates to meet our needs if our suppliers are unable or unwilling to supply such materials. Any delay or disruption in the availability of raw or bulk materials could slow or stop research and development of the relevant product.

We rely and anticipate that we will continue to rely on third parties to conduct our clinical trials, and those third parties may not perform satisfactorily, including failing to meet established deadlines for the completion of such clinical trials.

We are, and anticipate that we will continue to be, dependent on contract research organizations, third-party vendors and investigators for pre-clinical testing and clinical trials related to our drug discovery and development efforts. These parties are not our employees and we cannot control the amount or timing of resources that they devote to our programs. If they fail to devote sufficient time and resources to our drug development programs or if their performance is substandard, it will delay the development and commercialization of our product candidates. The parties with which we contract for execution of our clinical trials play a significant role in the conduct of the trials and the subsequent collection and analysis of data. Their failure to meet their obligations could adversely affect clinical development of our product candidates. Moreover, these parties also may have relationships with other commercial entities, some of which may compete with us. If they assist our competitors, it could harm our competitive position.

If we were to lose our relationship with any one or more of these parties, we could experience a significant delay in both identifying another comparable provider and then contracting for its services. We may then be

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unable to retain an alternative provider on reasonable terms, if at all. Even if we locate an alternative provider, is it likely that this provider may need additional time to respond to our needs and may not provide the same type or level of service as the original provider. In addition, any provider that we retain will be subject to Good Laboratory Practices, or cGLP, and similar foreign standards and we do not have control over compliance with these regulations by these providers. Consequently, if these practices and standards are not adhered to by these providers, the development and commercialization of our product candidates could be delayed.

We have very limited experience in marketing, selling or distributing our products, and we may need to rely on marketing partners or contract sales companies.

Even if we are able to develop our products and obtain necessary regulatory approvals, we have very limited experience or capabilities in marketing, selling or distributing our products. We currently have no sales, marketing and distribution infrastructure. Accordingly, we will be dependent on our ability to build this capability ourselves, which would require the investment of significant financial and management resources, or to find collaborative marketing partners or contract sales companies for commercial sale of our internally-developed products. Even if we find a potential marketing partner, of which there can be no assurance, we may not be able to negotiate a licensing contract on favorable terms to justify our investment or achieve adequate revenues.

We have very limited manufacturing experience or resources and we must incur significant costs to develop this expertise or rely on third parties to manufacture our products.

We have very limited manufacturing experience. Our internal manufacturing capabilities are limited to small-scale production of non-cGMP material for use in in vitro and in vivo experiments. Some of our product candidates utilize specialized formulations whose scale-up and manufacturing could be very difficult. We also have very limited experience in such scale-up and manufacturing, requiring us to depend on a limited number of third parties, who might not be able to deliver in a timely manner, or at all. In order to develop products, apply for regulatory approvals and commercialize our products, we will need to develop, contract for, or otherwise arrange for the necessary manufacturing capabilities. We may manufacture clinical trial materials ourselves or we may rely on others to manufacture the materials we will require for any clinical trials that we initiate. There are a limited number of manufacturers that supply synthetic siRNAs. We currently rely on several contract manufacturers for our supply of synthetic siRNAs. There are risks inherent in pharmaceutical manufacturing that could affect the ability of our contract manufacturers to meet our delivery time requirements or provide adequate amounts of material to meet our needs. Included in these risks are synthesis and purification failures and contamination during the manufacturing process, which could result in unusable product and cause delays in our development process, as well as additional expense to us. To fulfill our siRNA requirements, we may also need to secure alternative suppliers of synthetic siRNAs. In addition to the manufacture of the synthetic siRNAs, we may have additional manufacturing requirements related to the technology required to deliver the siRNA to the relevant cell or tissue type. In some cases, the delivery technology we utilize is highly specialized or proprietary, and for technical and legal reasons, we may have access to only one or a limited number of potential manufacturers for such delivery technology. Failure by these manufacturers to properly formulate our siRNAs for delivery could also result in unusable product and cause delays in our discovery and development process, as well as additional expense to us.

The manufacturing process for any products that we may develop is subject to the FDA and foreign regulatory authority approval process and we will need to contract with manufacturers who can meet all applicable FDA and foreign regulatory authority requirements on an ongoing basis. In addition, if we receive the necessary regulatory approval for any product candidate, we also expect to rely on third parties, including our commercial collaborators, to produce materials required for commercial supply. We may experience difficulty in obtaining adequate manufacturing capacity for our needs. If we are unable to obtain or maintain contract manufacturing for these product candidates, or to do so on commercially reasonable terms, we may not be able to successfully develop and commercialize our products.

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To the extent that we enter into manufacturing arrangements with third parties, we will depend on these third parties to perform their obligations in a timely manner and consistent with regulatory requirements, including those related to quality control and quality assurance. The failure of a third-party manufacturer to perform its obligations as expected could adversely affect our business in a number of ways, including:

If a third-party manufacturer with whom we contract fails to perform its obligations, we may be forced to manufacture the materials ourselves, for which we may not have the capabilities or resources, or enter into an agreement with a different third-party manufacturer, which we may not be able to do on reasonable terms, if at all. In some cases, the technical skills required to manufacture our product may be unique to the original manufacturer and we may have difficulty transferring such skills to a back-up or alternate supplier, or we may be unable to transfer such skills at all. In addition, if we are required to change manufacturers for any reason, we will be required to verify that the new manufacturer maintains facilities and procedures that comply with quality standards and with all applicable regulations and guidelines. The delays associated with the verification of a new manufacturer could negatively affect our ability to develop product candidates in a timely manner or within budget. Furthermore, a manufacturer may possess technology related to the manufacture of our product candidate that such manufacturer owns independently. This would increase our reliance on such manufacturer or require us to obtain a license from such manufacturer in order to have another third party manufacture our products.

Risks Related to our Intellectual Property and Other Legal Matters

If we are unable to adequately protect our proprietary technology from legal challenges, infringement or alternative technologies, our competitive position may be hurt and our operating results may be negatively impacted.

We specialize in the development and delivery of therapeutics based on RNA-based technologies, and rely on the issuance of patents, both in the U.S. and internationally, for protection against competitive technologies. Although we believe we exercise the necessary due diligence in our patent filings, our proprietary position is not established until the appropriate regulatory authorities actually issue a patent, which may take several years from initial filing or may never occur.

Moreover, even the established patent positions of pharmaceutical companies are generally uncertain and involve complex legal and factual issues. Although we believe our issued patents are valid, third parties may infringe our patents or may initiate proceedings challenging the validity or enforceability of our patents. The issuance of a patent is not conclusive as to its claim scope, validity or enforceability. Challenges raised in patent infringement litigation we initiate or in proceedings initiated by third parties may result in determinations that our patents have not been infringed or that they are invalid, unenforceable or otherwise subject to limitations. In the event of any such determinations, third parties may be able to use the discoveries or technologies claimed in our patents without paying us licensing fees or royalties, which could significantly diminish the value of these discoveries or technologies. As a result of such determinations, we may be enjoined from pursuing research, development or commercialization of potential products or may be required to obtain licenses, if available, to the third party patents or to develop or obtain alternative technology. Responding to challenges initiated by third parties may require significant expenditures and divert the attention of our management and key personnel from other business concerns.

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Furthermore, it is possible others will infringe or otherwise circumvent our issued patents and that we will be unable to fund the cost of litigation against them or that we would elect not to pursue litigation. In addition, enforcing our patents against third parties may require significant expenditures regardless of the outcome of such efforts. We also cannot assure you that others have not filed patent applications for technology covered by our pending applications or that we were the first to invent the technology. There may also exist third party patents or patent applications relevant to our potential products that may block or compete with the technologies covered by our patent applications and third parties may independently develop IP similar to our patented IP, which could result in, among other things, interference proceedings in the U.S. Patent and Trademark Office to determine priority of invention.

In addition, we may not be able to protect our established and pending patent positions from competitive technologies, which may provide more effective therapeutic benefit to patients and which may therefore make our products, technology and proprietary position obsolete.

We also rely on copyright and trademark protection, trade secrets, know-how, continuing technological innovation and licensing opportunities. In an effort to maintain the confidentiality and ownership of our trade secrets and proprietary information, we require our employees, consultants, advisors and others to whom we disclose confidential information to execute confidentiality and proprietary information agreements. However, it is possible that these agreements may be breached, invalidated or rendered unenforceable, and if so, there may not be an adequate corrective remedy available. Furthermore, like many companies in our industry, we may from time to time hire scientific personnel formerly employed by other companies involved in one or more areas similar to the activities we conduct. In some situations, our confidentiality and proprietary information agreements may conflict with, or be subject to, the rights of third parties with whom our employees, consultants or advisors have prior employment or consulting relationships. Although we require our employees and consultants to maintain the confidentiality of all confidential information of previous employers, we or these individuals may be subject to allegations of trade secret misappropriation or other similar claims as a result of their prior affiliations. Finally, others may independently develop substantially equivalent proprietary information and techniques, or otherwise gain access to our trade secrets. Our failure to protect our proprietary information and techniques may inhibit or limit our ability to exclude certain competitors from the market and execute our business strategies.

If we are unable to adequately protect our proprietary intellectual property from legal challenges, infringement or alternative technologies, we will not be able to compete effectively in the drug discovery and development business.

Because intellectual property rights are of limited duration, expiration of intellectual property rights and licenses will negatively impact our operating results.

Intellectual property rights, such as patents and license agreements based on those patents, generally are of limited duration. Our operating results depend on our patents and IP licenses. Therefore, the expiration or other loss of rights associated with IP and IP licenses can negatively impact our business.

Our patent applications may be inadequate in terms of priority, scope or commercial value.

We apply for patents covering our discoveries and technologies as we deem appropriate. However, we may fail to apply for patents on important discoveries or technologies in a timely fashion or at all. Also, our pending patent applications may not result in the issuance of any patents. These applications may not be sufficient to meet the statutory requirements for patentability, and therefore we may be unable to obtain enforceable patents covering the related discoveries or technologies we may want to commercialize. In addition, because patent applications are maintained in secrecy for approximately 18 months after filing, other parties may have filed patent applications relating to inventions before our applications covering the same or similar inventions. In addition, foreign patent applications are often published initially in local languages, and until an English

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language translation is available it can be impossible to determine the significance of a third party invention. Any patent applications filed by third parties may prevail over our patent applications or may result in patents that issue alongside patents issued to us, leading to uncertainty over the scope of the patents or the freedom to practice the claimed inventions.

Although we have in-licensed a number of issued patents, the discoveries or technologies covered by these patents may not have any therapeutic or commercial value. Also, issued patents may not provide commercially meaningful protection against competitors. Other parties may be able to design around our issued patents or independently develop products having effects similar or identical to our patented product candidates. In addition, the scope of our patents is subject to considerable uncertainty and competitors or other parties may obtain similar patents of uncertain scope.

We are dependent on technologies we license, and if we lose the right to license such technologies or we fail to license new technologies in the future, our ability to develop new products would be harmed.

We currently are dependent on licenses from third parties for our key technologies relating to fundamental RNAi technologies. Our current licenses impose, and any future licenses we enter are likely to impose, various development, funding, royalty, diligence, sublicensing, insurance and other obligations on us. If our license with respect to any of these technologies is terminated for any reason, the development of the products contemplated by the licenses would be delayed, or suspended altogether, while we seek to license similar technology or develop new non-infringing technology. The costs of obtaining new licenses are high, and many patents in the RNAi field have already been exclusively licensed to third parties, including our competitors. If any of our existing licenses is terminated, the development of the products contemplated by the licenses could be delayed or terminated and we may not be able to negotiate additional licenses on acceptable terms, if at all, which would have a material adverse effect on our business.

We may be required to defend lawsuits or pay damages for product liability claims.

Our business inherently exposes us to potential product liability claims. We face substantial product liability exposure in human clinical trials that we may initiate and for products that we sell, or manufacture for others to sell, after regulatory approval. The risk exists even with respect to those drugs that are approved by regulatory agencies for commercial distribution and sale and are manufactured in facilities licensed and regulated by regulatory agencies. Any product liability claims, regardless of their merits, could be costly, divert management’s attention, delay or prevent completion of our clinical development programs, and adversely affect our reputation and the demand for our products. We currently have product liability insurance that we believe is appropriate for our stage of development and may need to obtain higher levels prior to marketing any of our product candidates. Any insurance we have or may obtain may not provide sufficient coverage against potential liabilities. Furthermore, clinical trial and product liability insurance is becoming increasingly expensive. As a result, we may be unable to obtain sufficient insurance at a reasonable cost to protect us against losses caused by product liability claims that could have a material adverse effect on our business.

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Risks Related to the Commercialization of our Product Candidates

Our product development efforts may not result in commercial products.

Our future results of operations depend, to a significant degree, upon our and any collaboration partners’ ability to successfully develop and commercialize pharmaceutical products. The development and commercialization process, particularly with respect to innovative products, is both time consuming and costly and involves a high degree of business risk. Successful product development in the pharmaceutical industry is highly uncertain, and very few research and development projects result in a commercial product. Product candidates that appear promising in the early phases of development, such as in preclinical testing or in early human clinical trials, may fail to reach the market for a number of reasons, such as:

Only one of our product candidates utilizing our technologies has commenced human clinical studies, and none of such product candidates has been approved by the FDA or any foreign regulatory authority. There can be no assurance that any of our product candidates currently in research or development, or that may enter research or development, will ever be successfully commercialized, and delays in any part of the process or our inability to obtain regulatory approval could adversely affect our operating results by restricting introduction of new products by us or any future collaboration partners.

Even if we are successful in developing and commercializing a product candidate, it is possible that the commercial opportunity for RNA-based therapeutics will be limited.

The product candidates that we are developing are based on new technologies and therapeutic approaches, none of which have yet been brought to market. Key participants in pharmaceutical marketplaces, such as physicians, third-party payors and consumers, may not accept a product intended to improve therapeutic results based on RNAi technology. Accordingly, while we believe there will be a commercial market for RNA-based therapeutics utilizing our technologies, there can be no assurance that this will be the case, in particular given the novelty of the field. Many factors may affect the market acceptance and commercial success of any potential products, including:

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Risks Related to our Industry

Any drugs we develop may become subject to unfavorable pricing regulations, third-party reimbursement practices or healthcare reform initiatives, which could have a material adverse effect on our business.

The success of our products will depend upon the extent to which third-party payors, such as Medicare, Medicaid and other domestic and international government programs, private insurance plans and managed care programs, provide reimbursement for the use of such products. Most third-party payors may deny reimbursement if they determine that a medical product was not used in accordance with cost-effective treatment methods, as determined by the third-party payor, or was used for an unapproved indication.

Third-party payors also may refuse to reimburse for experimental procedures and devices. Furthermore, because our programs are in the early stages of development, we are unable at this time to determine their cost-effectiveness and the level or method of reimbursement. Increasingly, the third-party payors, who reimburse patients, such as government and private insurance plans, are requiring that drug companies provide them with predetermined discounts from list prices, and are challenging the prices charged for medical products. If the price we are able to charge for any products we develop is inadequate in light of our development and other costs, our profitability could be adversely effected.

We currently expect that any drugs we develop may need to be administered under the supervision of a physician. Under currently applicable law, drugs that are not usually self-administered may be eligible for coverage by the Medicare program if:

There may be significant delays in obtaining insurance coverage for newly-approved drugs, and insurance coverage may be more limited than the purpose for which the drug is approved by the FDA. Moreover, eligibility for insurance coverage does not imply that any drug will be reimbursed in all cases or at a rate that covers our costs, including research, development, manufacture, sale and distribution. Interim payments for new drugs, if applicable, may also not be sufficient to cover our costs and may not be made permanent. Reimbursement may be based on payments for other services and may reflect budgetary constraints or imperfections in Medicare data. Net prices for drugs may be reduced by mandatory discounts or rebates required by government health care programs or private payors and by any future relaxation of laws that presently restrict imports of drugs from countries where they may be sold at lower prices than in the United States. Third-party payors often rely upon Medicare coverage policy and payment limitations in setting their own reimbursement rates. Our inability to promptly obtain coverage and profitable reimbursement rates from both government-funded and private payors for new drugs that we develop could have a material adverse effect on our operating results, our ability to raise capital needed to develop products, and our overall financial condition.

We believe that the efforts of governments and third-party payors to contain or reduce the cost of healthcare and legislative and regulatory proposals to broaden the availability of healthcare will continue to affect the business and financial condition of pharmaceutical and biopharmaceutical companies. A number of legislative and regulatory changes in the healthcare system in the United States and other major healthcare markets have been proposed in recent years, and such efforts have expanded substantially in recent years. These developments have included prescription drug benefit legislation that was enacted and took effect in January 2006, healthcare reform legislation recently enacted by certain states, and major healthcare reform legislation that was passed by Congress and enacted into law in the United States in 2010. These developments could, directly or indirectly, affect our ability to sell our products, if approved, at a favorable price.

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In particular, in March 2010, the Patient Protection and Affordable Care Act, or PPACA, and a related reconciliation bill were signed into law. This new legislation changes the current system of healthcare insurance and benefits intended to broaden coverage and control costs. The new law also contains provisions that will affect companies in the pharmaceutical industry and other healthcare related industries by imposing additional costs and changes to business practices.

The full effects of the U.S. healthcare reform legislation cannot be known until the new law is implemented through regulations or guidance issued by the Centers for Medicare & Medicaid Services and other federal and state healthcare agencies. The financial impact of the U.S. healthcare reform legislation over the next few years will depend on a number of factors, including but not limited, to the policies reflected in implementing regulations and guidance, and changes in sales volumes for products affected by the new system of rebates, discounts and fees. The new legislation may also have a positive impact on our future net sales, if any, by increasing the aggregate number of persons with healthcare coverage in the United States, but such increases are unlikely to be realized until approximately 2014 at the earliest.

Moreover, we cannot predict what healthcare reform initiatives may be adopted in the future. Further federal and state legislative and regulatory developments are likely, and we expect ongoing initiatives in the United States to increase pressure on drug pricing. Such reforms could have an adverse effect on anticipated revenues from product candidates that we may successfully develop and for which we may obtain regulatory approval and may affect our overall financial condition and ability to develop drug candidates.

The pharmaceutical market is intensely competitive. If we are unable to compete effectively with existing drugs, new treatment methods and new technologies, we may be unable to commercialize successfully any drugs that we develop.

The pharmaceutical market is intensely competitive and rapidly changing. Many large pharmaceutical and biotechnology companies, academic institutions, governmental agencies and other public and private research organizations are pursuing the development of novel drugs for the same diseases that we are targeting or expect to target. Many of our competitors have:

We will face intense competition from drugs that have already been approved and accepted by the medical community for the treatment of the conditions for which we may develop drugs. We also expect to face competition from new drugs that enter the market. We believe a significant number of drugs are currently under development, and may become commercially available in the future, for the treatment of conditions for which we may try to develop drugs. These drugs may be more effective, safer, less expensive, or marketed and sold more effectively, than any products we develop.

If we successfully develop product candidates, and obtain approval for them, we will face competition based on many different factors, including:

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Our competitors may develop or commercialize products with significant advantages over any products we develop based on any of the factors listed above or on other factors. Our competitors may therefore be more successful in commercializing their products than we are, which could adversely affect our competitive position and business. Competitive products may make any products we develop obsolete or noncompetitive before we can recover the expenses of developing and commercializing our product candidates. Such competitors could also recruit our employees, which could negatively impact our level of expertise and the ability to execute on our business plan. Furthermore, we also face competition from existing and new treatment methods that reduce or eliminate the need for drugs, such as the use of advanced medical devices. The development of new medical devices or other treatment methods for the diseases we are targeting could make our product candidates noncompetitive, obsolete or uneconomical.

We may be unable to compete successfully against other companies that are working to develop novel drugs and technology platforms using technology similar to ours.

In addition to the competition we face from competing drugs in general, we also face competition from other pharmaceutical companies and medical institutions that are working to develop novel drugs using technology that competes more directly with our own. Among those companies that are working in this field are: Alnylam Pharmaceuticals, Benitec, Dicerna Pharmaceuticals, Inc., Quark Pharmaceuticals, Inc., Regulus, RXi Pharmaceuticals, Silence Therapeutics plc, and Tekmira Pharmaceutical Corp., as well as a number of the multinational pharmaceutical companies. Any of these companies may develop its technology more rapidly and more effectively than us.

In addition to competition with respect to our technology and with respect to specific products, we face substantial competition to discover and develop safe and effective means to deliver the drugs that we develop to the relevant cell and tissue types. Substantial resources are being expended by third parties, both in academic laboratories and in the corporate sector, in the effort to discover and develop a safe and effective means of delivery into the relevant cell and tissue types. If safe and effective means to the relevant cell and tissue types were developed by our competitors, our ability to successfully commercialize a competitive product would be adversely affected.

Many of our competitors have substantially greater research and development capabilities and financial, scientific, technical, manufacturing, marketing, distribution, and other resources than us. Even if we are successful in developing our product candidates, in order to compete successfully we may need to be first to market or to demonstrate that our products are superior to therapies based on different technologies. If we are not first to market or are unable to demonstrate such superiority, any products for which we are able to obtain approval may not be successful.

Risks Related to our Common Stock

The trading price of our common stock has been volatile, and investors in our common stock may experience substantial losses.

The trading price of our common stock has been volatile and may become volatile again in the future. The trading price of our common stock could decline or fluctuate in response to a variety of factors, including:

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The stock markets in general, and the markets for biotechnology stocks in particular, have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. These broad market fluctuations may adversely affect the trading price of our common stock.

The Nasdaq Global Market imposes listing standards on our common stock that we may not be able to fulfill, thereby leading to a possible delisting of our common stock.

As a listed Nasdaq Global Market company, we are subject to rules covering, among other things, certain major corporate transactions, the composition of our Board of Directors and committees thereof, minimum bid price of our common stock and minimum stockholders equity. The failure to meet these or other Nasdaq Global Market requirements may result in the de-listing of our common stock from the Nasdaq Global Market, which could adversely affect the liquidity and market price thereof.

Various restrictions in our charter documents and Delaware law could prevent or delay a change in control of us that is not supported by our board of directors.

We are subject to a number of provisions in our charter documents and Delaware law that may discourage, delay or prevent a merger, acquisition or change of control that a stockholder may consider favorable. These anti-takeover provisions include:

Section 203 of the Delaware General Corporation Law prohibits a merger, consolidation, asset sale or other similar business combination between us and any stockholder of 15% or more of our voting stock for a period of three years after the stockholder acquires 15% or more of our voting stock, unless (1) the transaction is approved by our board of directors before the stockholder acquires 15% or more of our voting stock, (2) upon completing the transaction the stockholder owns at least 85% of our voting stock outstanding at the commencement of the transaction, or (3) the transaction is approved by our board of directors and the holders of 66 ²/3% of our voting stock, excluding shares of our voting stock owned by the stockholder.

We have never paid dividends on our common stock and we do not anticipate paying cash dividends in the foreseeable future.

We have not paid any dividends on our common stock to date, and we currently intend to retain our future earnings, if any, to fund the development and growth of our business. In addition, the terms of any future debt or credit facility may preclude us from paying any dividends.

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The anti-takeover provisions of our stockholder rights plan may entrench management, may delay or prevent beneficial takeover bids by third parties and may prevent or frustrate any stockholder attempt to replace or remove the current management even if the stockholders consider it beneficial to do so.

We have a stockholder rights plan designed to protect our stockholders from coercive or unfair takeover tactics. Under the plan, we declared a dividend of one preferred stock purchase right for each share of common stock outstanding on March 17, 2000. Each preferred stock purchase right entitles the holder to purchase from us 1/1000th of a share of Series A Junior Participating Preferred Stock for $50.00. In the event any acquiring entity or group accumulates or initiates a tender offer to purchase 15% or more of our common stock, then each holder of a preferred stock purchase right, other than the acquiring entity and its affiliates, will have the right to receive, upon exercise of the preferred stock purchase right, shares of our common stock or shares in the acquiring entity having a value equal to two times the exercise price of the preferred stock purchase right. The preferred stock purchase rights will expire on March 17, 2013, unless we extend the expiration date or in certain limited circumstances, we redeem or exchange such rights prior to such date.

The intent of the stockholder rights plan is to protect our stockholders’ interests by encouraging anyone seeking control of our company to negotiate with our board of directors. However, our stockholder rights plan could make it more difficult for a third party to acquire us without the consent of our board of directors, even if doing so may be beneficial to our stockholders. This plan may discourage, delay or prevent a tender offer or takeover attempt, including offers or attempts that could result in a premium over the market price of our common stock. This plan could reduce the price that investors might be willing to pay for shares of our common stock in the future. Furthermore, the anti-takeover provisions of our stockholder rights plan may entrench management and make it more difficult for stockholders to replace management even if the stockholders consider it beneficial to do so.

A significant number of shares of our common stock are subject to options, warrants and subscription investment units, and we expect to sell additional shares of our common stock in the future. Sales of these shares will dilute the interests of other security holders and may depress the price of our common stock.

As of March 15, 2011, there were 34,364,514 shares of common stock outstanding. As of March 15, 2011, there were vested outstanding options to purchase 2,033,428 shares of common stock, unvested outstanding options to purchase 543,633 shares of common stock, outstanding warrants to purchase 4,943,276 shares of common stock, and outstanding subscription investment units to purchase 2,348,550 shares of common stock. At March 15, 2011, there were 1,077,895 shares of common stock available for future issuance under our stock compensation plans. In addition, we may issue additional common stock and warrants from time to time to finance our operations. We may also issue additional shares to fund potential acquisitions or in connection with additional stock options or restricted stock granted to our employees, officers, directors and consultants under our equity compensation plans. The issuance, perception that issuance may occur, or exercise of warrants or options will have a dilutive impact on other stockholders and could have a material negative effect on the market price of our common stock.

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None.

The following is a summary of our properties and related lease obligations. We do not own any real property. We believe that these facilities are sufficient to support our research and development, operational, manufacturing and administrative needs under our current operating plan.

3830 Monte Villa Parkway, Bothell, Washington. We lease approximately 63,200 square feet of research and development and office space in Bothell, Washington. This lease is scheduled to expire in February 2016 and has a five-year renewal option.

One Kendall Square, Cambridge, Massachusetts. We lease approximately 5,000 square feet of research and development and office space in Cambridge, Massachusetts. This lease is scheduled to expire in July 2012 and has a three-year renewal option.

3450 Monte Villa Parkway, Bothell, Washington. We lease approximately 32,000 square feet of research and development, and office space in Bothell, Washington. Since we exited this facility in September 2008, we have taken steps to reduce our future rent obligations due under the lease, which is scheduled to expire in January 2016. In December 2010, we entered into an amendment of the lease which reduced our future lease obligations by approximately $4.1 million and we issued 2,115,727 shares of our common stock to the landlord. We have no cash rent obligations under the 3450 Monte Villa lease until July 2011.

We are subject to various legal proceedings and claims that arise in the ordinary course of business. Our management currently believes that resolution of such legal matters will not have a material adverse impact on our financial position, results of operations or cash flows.

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PART II

Market Information

Our common stock is listed on the Nasdaq Global Market under the symbol “MRNA.” The following table sets forth, for each of the quarterly periods indicated, the range of high and low sales prices of our common stock, as reported on the Nasdaq Global Market. The prices set forth in the table below reflect the 1-for-4 reverse split of our common stock that became effective on the Nasdaq Global Market beginning on July 22, 2010.

On March 21, 2011 the closing price of our common stock reported on the Nasdaq Global Market was $0.63 per share.

Holders

As of March 16, 2011, there were approximately 15,000 beneficial holders of record of our common stock.

Dividends

Payment of dividends and the amount of dividends depend on matters deemed relevant by our Board, such as our results of operations, financial condition, cash requirements, future prospects and any limitations imposed by law, credit agreements and debt securities. To date, we have not paid any cash dividends or stock dividends on our common stock. In addition, we currently anticipate that we will not pay any cash dividends in the foreseeable future and intend to use retained earnings, if any, for working capital purposes.

Unregistered Sales of Equity Securities

Pursuant to that certain Payment Acknowledgement between our company and Canaccord Genuity Inc. dated December 31, 2010, we issued to Canaccord Genuity an aggregate of 289,436 shares of our common stock in full and complete satisfaction of any and all remaining liabilities owed to Canaccord Genuity by us arising out of that certain letter agreement dated February 4, 2010 between our company and Canaccord. The services that Canaccord Genuity provided to us pursuant to the letter agreement related to the merger between our company and Cequent Pharmaceuticals, Inc., which merger became effective on July 21, 2010. The shares were offered and sold in reliance on the exemption from registration afforded by Section 4(2) of the Securities Act. On March 14, 2011, we filed a registration statement on Form S-3 (No. 333-172819) with the SEC to register for resale the shares of common stock issued to Canaccord.

Not applicable.

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Overview

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations is intended to provide information necessary to understand our audited consolidated financial statements for the two-year period ended December 31, 2010, and highlight certain other information which, in the opinion of management, will enhance a reader’s understanding of our financial condition, changes in financial condition and results of operations. In particular, the discussion is intended to provide an analysis of significant trends and material changes in our financial position and the operating results of our business during the year ended December 31, 2010 as compared to the year ended December 31, 2009. This discussion should be read in conjunction with our consolidated financial statements for the two-year period ended December 31, 2010 and related notes included elsewhere in this annual report on Form 10-K. These historical financial statements may not be indicative of our future performance. This Management’s Discussion and Analysis of Financial Condition and Results of Operations contains a number of forward-looking statements, all of which are based on our current expectations and could be affected by the uncertainties and risks described throughout this filing, particularly in “Item 1A. Risk Factors.”

This Item is organized as follows:

Background

We are a biotechnology company focused on the discovery, development and commercialization of oligonucleotide therapies based on gene silencing approaches such as RNA interference (RNAi) and blocking messenger RNA (mRNA) transcription. Our goal is to improve human health through the development of these nucleic acid-based therapeutics as well as the drug delivery technologies that together provide superior treatment options for patients. We have multiple proprietary technologies integrated into a broad oligonucleotide-based drug discovery platform, with the capability to deliver these novel therapeutics via systemic, local and oral administration to target a wide range of human diseases based on the unique characteristics of the cells and organs involved in each disease.

Our pipeline includes a clinical program in Familial Adenomatous Polyposis (FAP) and two preclinical programs in malignant ascites and bladder cancer, respectively. In February 2011, we entered an exclusive agreement with Debiopharm Group for the development and commercialization of the bladder cancer program.

Our team of approximately 30 scientists brings expertise in molecular and cellular biology, microbiology, oligonucleotide, nucleoside, lipid, peptide and alkylated amino acid chemistry, pharmacology, bioinformatics, pre-clinical and clinical development, regulatory affairs and quality control, in addition to an experienced pharmaceutical management team.

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In addition to our own, internally developed technologies, we strategically in-license and further develop nucleic acid- and delivery-related technologies, forming an integrated drug discovery platform. We are currently employing our platform for the discovery of multiple nucleic-based therapeutics including RNAi-, microRNA- and single stranded oligonucleotide-based drugs.

Our business strategy is two-fold. First, we strive to establish collaborations and strategic partnerships with pharmaceutical and biotechnology companies in the area of nucleic acid-based therapeutics to: (1) generate revenue and non-dilutive financing; (2) gain access to technical resources; and (3) further validate our drug discovery platforms. Secondly, we expect to advance our own pipeline of nucleic acid-based therapeutics as a foundation upon which to improve all aspects of our drug discovery platform and to have the opportunity to commercialize drug therapies. In terms of collaborations and strategic partnerships, the Debiopharm Group is fully funding the development of the bladder cancer program using our proprietary DiLA² delivery technology for local administration which includes the potential for significant milestones, and ProNAi Therapeutics, a licensee of certain of our technology, is funding their Phase 1 clinical trial using our proprietary SMARTICLES^® delivery technology for systemic administration, which does not provide any financial benefit to us but continues to validate and advance our SMARTICLES^® delivery technology. With these relationships financing the advancement of several of our small interfering RNA (siRNA) proprietary delivery technologies, we are focusing resources on the Phase 1b/2a clinical trial of CEQ508 in Familial Adenomatous Polyposis (FAP) as well as the development of our Conformationally Restricted Nucleotide technology (CRN) for the development of single-stranded oligonucleotide therapies.

In 2010 we entered into five early collaborative efforts (a sixth had been initiated in 2009) with major pharmaceutical companies and a biotechnology company to evaluate our DiLA² and SMARTICLES delivery technologies for local and systemic delivery of siRNA. Four of the six efforts continued into 2011, and our goal continues to be the establishment of a strategic partnership with at least one of these companies in 2011. We expect to structure certain of our collaborative agreements to receive upfront non-refundable payments, research and development funding, milestone payments and royalties on commercial sales of products.

With respect to collaborations and strategic partnerships our concept is to provide multiple therapeutic options based on a partner’s target and indication. We can apply our broad capabilities to pursue the most appropriate nucleic acid therapeutic approach to a specific, often undruggable, target for a specific indication. Each approach, i.e. RNAi, microRNA or single-strand oligonucleotide, has its advantages and disadvantages and we can utilize our broad capabilities to screen across multiple modalities to identify the most effective therapeutic. We believe this capability makes us extremely unique in the sector.

In 2010, we acquired Cequent Pharmaceuticals, Inc. and its TransKingdom RNA™ interference (tkRNAi) platform and FAP clinical program, the intellectual property related to CRN technology from Valeant Pharmaceuticals and the intellectual property related to SMARTICLES from Novosom. Additionally, we licensed one of our nasal legacy assets, carbetocin, to Cypress Biosciences.

In order to protect our innovations, which encompass a broad platform of both nucleic acid constructs and delivery technologies, as well as the drug products that may emerge from that platform; we aggressively continue to build upon our extensive and enabling intellectual property (“IP”) estate.

We believe we have established ourselves as a leading nucleic acid-based therapeutics company by leveraging our broad and proven expertise to create an industry-leading integrated nucleic acid-based drug discovery platform, which is protected by a strong IP position and validated through licensing agreements with two large international pharmaceutical companies, our FAP phase 1b/2a clinical trial, the bladder cancer research and license agreement with Debiopharm Group and the phase 1 ProNAi trial using our SMARTICLES delivery technology.

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Going Concern

The accompanying consolidated financial statements have been prepared on the basis that we will continue as a going concern, which contemplates realization of assets and the satisfaction of liabilities in the normal course of business. As of December 31, 2010, we had an accumulated deficit of approximately $290.8 million and expect to incur losses in the future as we continue our research and development (“R&D”) activities. In 2008, we suspended all research and clinical development of our intranasal programs and, as of September 30, 2008, incurred a restructuring charge to exit a facility which was used primarily for our intranasal activities. As of September 30, 2008, our accumulated deficit, which was primarily related to clinical development of our intranasal programs, was approximately $241.8 million. Our operating expenses, primarily R&D in connection with the further development of our RNAi programs, will consume the majority of our cash resources and will require additional funding. We have funded our losses primarily through the sale of common stock and warrants in the public markets and private placements, revenue provided by our collaboration partners, and, to a lesser extent, equipment financing facilities and loans.

At December 31, 2010, we had a working capital deficit (current assets less current liabilities) of approximately $3.3 million and approximately $2.1 million in cash, including approximately $1.0 million in restricted cash. In February 2011, we raised net proceeds of approximately $4.7 million in an underwritten public offering of 6,375,000 shares of common stock and warrants to purchase up to 1,113,075 shares of common stock using a universal shelf registration statement that was declared effective by the SEC in September 2010. The universal shelf registration statement registered the issuance of up to $50 million of our securities. We believe that our current resources will be sufficient to fund our planned operations into the second quarter of 2011.

We plan to continue to work with large pharmaceutical companies regarding research and development collaboration agreements or investments, and to pursue public and private sources of financing to raise cash. However, there can be no assurance that we will be successful in such endeavors. The market value and the volatility of our stock price, as well as general market conditions, could make it difficult for us to complete a financing transaction on favorable terms, or at all. Any financing we obtain may further dilute the ownership interest of our current stockholders, or provide new stockholders with superior rights than those possessed by our current stockholders. If we are unable to obtain additional capital when required, and in the amounts required, we may be forced to modify, delay or abandon some or all of our programs. These factors, among others, raise substantial doubt about our ability to continue as a going concern. The accompanying consolidated financial statements do not include any adjustments that may result from the outcome of this uncertainty. The Report of Independent Registered Public Accounting Firm included in this Annual Report states that these conditions, among others, raise substantial doubt about our ability to continue as a going concern.

Critical Accounting Policies and Estimates

We prepare our consolidated financial statements in conformity with accounting principles generally accepted in the United States of America. As such, we are required to make certain estimates, judgments and assumptions that we believe are reasonable based upon the information available. These estimates and assumptions affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the periods presented. Actual results could differ significantly from those estimates under different assumptions and conditions. We believe that the following discussion addresses our most critical accounting estimates, which are those that we believe are most important to the portrayal of our financial condition and results of operations and which require our most difficult and subjective judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain. Other key estimates and assumptions that affect reported amounts and disclosures include depreciation and amortization. We also have key accounting policies; however, these policies do not meet the definition of critical accounting estimates because they do not generally require us to make estimates or judgments that are difficult or subjective.

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Revenue Recognition

Revenue is recognized when there is persuasive evidence that an arrangement exists, delivery has occurred, collectability is reasonably assured, and fees are fixed or determinable. Deferred revenue expected to be recognized within the next 12 months is classified as current. Substantially all of our revenues are generated from research and development collaborations and licensing arrangements with partners that may involve multiple deliverables. For multiple-deliverable arrangements, judgment is required to evaluate whether (a) an arrangement involving multiple deliverables contains more than one unit of accounting, and (b) how the arrangement consideration should be measured and allocated to the separate units of accounting in the arrangement. Our research and development collaborations may include upfront non-refundable payments, development milestone payments, R&D funding, patent-based or product sale royalties, and product sales. In addition, we may receive revenues from licensing arrangements. For each separate unit of accounting, we have determined that the delivered item has value to the customer on a stand-alone basis, we have objective and reliable evidence of fair value using available internal evidence for the undelivered item(s) and our arrangements generally do not contain a general right of return relative to the delivered item. We have not had multiple-deliverable arrangements of significance during 2010, and all such prior arrangements were complete or terminated in 2009.

Revenue from research and development collaborations is recorded when earned based on the specific terms of the contracts. Upfront non-refundable payments, where we are not providing any continuing services as in the case of a license to our IP, are recognized when delivery of the license has occurred. Upfront nonrefundable payments, where we are providing continuing services related to a research and development effort, are deferred and recognized as revenue over the collaboration period. The ability to estimate the total research and development effort and costs can vary significantly for each contract due to the inherent complexities and uncertainties of drug research and development. The estimated period of time over which we recognize certain revenues is based upon structured detailed project plans completed by our project managers, who meet with scientists and collaborative counterparts on a regular basis and schedule the key project activities and resources including headcount, facilities and equipment and budgets. These periods generally end on projected milestone dates typically associated with the stages of drug development, i.e. filing of an IND, initiation of a Phase 1 human clinical trial or filing of an NDA. We typically do not disclose the specific project planning details of a research and development collaboration for competitive reasons and due to confidentiality clauses in our contracts. As drug candidates and drug compounds move through the research and development process, it is necessary to revise these estimates to consider changes to the project plan, portions of which may be outside of our control. The impact on revenue of changes in our estimates and the timing thereof is recognized prospectively over the remaining estimated development period.

Milestone payments typically represent nonrefundable payments to be received in conjunction with the achievement of a specific event identified in the contract, such as initiation or completion of specified development activities or specific regulatory actions such as the filing of an IND. We believe a milestone payment represents the culmination of a distinct earnings process when it is not associated with ongoing research, development or other performance on our part and it is substantive in nature. We recognize such milestone payments as revenue when they become due and collection is reasonably assured.

Revenue from R&D funding is generally received for services performed under research and development collaboration agreements and is recognized as services are performed. Payments received in excess of amounts earned are recorded as deferred revenue. Reimbursements received for direct out-of-pocket expenses related to contract R&D costs are recorded as revenue in the consolidated statements of operations rather than as a reduction in expenses.

Royalty and earn-out payment revenue is generally recognized upon product sale by the licensee as reported by the licensee.

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Research and Development Costs

All research and development (“R&D”) costs are charged to operations as incurred. Our R&D expenses consist of costs incurred for internal and external R&D. These costs include direct and research-related overhead expenses. We recognize clinical trial expenses, which are included in research and development expenses, based on a variety of factors, including actual and estimated labor hours, clinical site initiation activities, patient enrollment rates, estimates of external costs and other activity-based factors. We believe that this method best approximates the efforts expended on a clinical trial with the expenses recorded. We adjust our rate of clinical expense recognition if actual results differ from our estimates. As clinical trial activities continue, it is necessary to revise these estimates to consider changes such as changes in the clinical development plan, regulatory requirements, or various other factors, many of which may be outside of our control. The impact of changes in our estimates of clinical trial expenses and the timing thereof, is recognized prospectively over the remaining estimated clinical trial period. The ability to estimate total clinical trial costs can vary significantly due to the inherent complexities and uncertainties of drug development.

Stock-Based Compensation

We use the Black-Scholes-Merton option pricing model as our method of valuation for stock-based awards. Stock-based compensation expense is based on the value of the portion of the stock-based award that will vest during the period, adjusted for expected forfeitures. Our determination of the fair value of stock-based awards on the date of grant using an option pricing model is affected by our stock price as well as assumptions regarding a number of highly complex and subjective variables. These variables include, but are not limited to, the expected life of the award, expected stock price volatility over the term of the award and historical and projected exercise behaviors. The estimation of stock-based awards that will ultimately vest requires judgment, and to the extent actual or updated results differ from our current estimates, such amounts will be recorded in the period estimates are revised. The Black-Scholes-Merton option pricing model requires the input of highly subjective assumptions, and other reasonable assumptions could provide differing results.

For example, during 2010, approximately 0.2 million options were granted, which have a weighted average exercise price of $2.63 and weighted average fair value of $2.19 as determined by the Black-Scholes-Merton option pricing model. The following illustrates the effect of changing expected life and volatility assumptions on the estimated fair value using the Black-Scholes-Merton option pricing model of our options granted during 2010.

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Our reported net loss was $27.8 million for 2010. If the expected term for options granted during 2010 increased or decreased by one year (all other variables held constant), the impact on our reported net loss would not be material. If the estimated volatility for the options granted during 2010 decreased or increased by 10% (all other variables held constant), the impact on our reported net loss would not be material.

Stock-based compensation expense is recognized on a straight-line basis over the applicable vesting periods, based on the fair value of such stock-based awards on the grant date. We anticipate the expected term and estimated volatility will remain within the ranges listed above in the near term, however, unanticipated business or other conditions may change, which could result in differing future results.

Valuation of Intangible Assets

A substantial portion of assets acquired in the Cequent merger have been allocated to identifiable intangible assets related to in-process research and development (“IPR&D”) projects identified by management. Our management has estimated acquisition-date fair values of these intangible assets. These identified intangible assets have been valued based on a number of factors. Utilizing the income approach, a discounted cash flow model using forecasted operating results related to the identified intangible assets, fair value was $19.3 million for Familial Adenomatous Polyposis and $3.4 million for Transkingdom RNAI, a total of $22.7 million.

We estimated the fair value of these intangible assets using a present value discount rate of 23%, which was based on the estimated weighted-average cost of capital for companies with profiles substantially similar to ours. We then determined the present value of the expected future cash flows using the discount rate. The projected cash flows from the projects were based on key assumptions such as estimates of revenues and operating profits related to the projects considering their stages of development; the time and resources needed to complete development and receive approval; the life of the potential commercialized products and associated risks, including the inherent difficulties and uncertainties in development such as obtaining marketing approval from the U.S. Food and Drug Administration and other regulatory agencies; and risks related to the viability of and potential alternative treatments in any future target markets.

Accounting guidance requires that the fair value of IPR&D acquired in a business combination be recorded on the balance sheet regardless of the likelihood of success as of the acquisition date. Intangible assets related to IPR&D projects are considered to be indefinite-lived until completion or abandonment of the related project. During the period the assets are considered indefinite-lived, they will not be amortized but will be tested for impairment on an annual basis and between annual tests if we become aware of any events occurring or changes in circumstances that would indicate a reduction in the fair value of the projects below their respective carrying amounts. If and when it were determined that identified intangible assets were impaired, an impairment charge would be recorded then. If and when development is complete, which generally occurs if and when regulatory approval to market a product is obtained, the associated assets would be deemed finite-lived and would then be amortized based on their respective estimated useful lives at that date.

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Impairment of Long-Lived Assets

Long-lived assets, such as property and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Conditions that would necessitate an impairment include a significant decline in the observable market value of an asset, a significant change in the extent or manner in which an asset is used, or any other significant adverse change that would indicate that the carrying amount of an asset or group of assets is not recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset.

Fair Value Liability for Price Adjustable Warrants and Subscription Investment Units

We use the Black-Scholes-Merton option pricing model as our method of valuation for price adjustable warrants and subscription investment units. Our determination of the fair value of price adjustable securities as of the reporting date is affected by our stock price as well as assumptions regarding a number of highly complex and subjective variables. These variables include, but are not limited to, expected stock price volatility over the term of the security and risk-free interest rate. In addition, the Black-Scholes-Merton option pricing model requires the input of an expected life for the securities for which we have used the remaining contractual life. The fair value liability is revalued each balance sheet date utilizing Black-Scholes-Merton valuation model computations with the decrease or increase in fair value being reported in the statement of operations as other income or expense, respectively. The primary factor affecting the fair value liability is our stock price. In addition, the Black-Scholes-Merton option pricing model requires the input of highly subjective assumptions, and other reasonable assumptions could provide differing results.

The following illustrates the effect that reasonably likely changes in our stock price would have on the estimated fair value liability for price adjustable securities that were outstanding as of December 31, 2010.

Our reported net loss was approximately $27.8 million for 2010. If our December 31, 2010 closing stock price had been 10% lower, our net loss would have been approximately $0.5 million lower. If our December 31, 2010 closing stock price had been 10% higher, our net loss would have been approximately $0.5 million higher.

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The following illustrates the effect of changing the volatility assumptions on the estimated fair value liability for price adjustable securities that were outstanding as of December 31, 2010:

Our reported net loss was approximately $27.8 million for 2010. If our December 31, 2010 volatility assumption had been 10% lower, our net loss would have been approximately $0.2 million lower. If our December 31, 2010 volatility assumption had been 10% higher, our net loss would have been approximately $0.2 million higher.

Accrued Restructuring Charges

We ceased using our facility at 3450 Monte Villa Parkway, Bothell, Washington (“3450 Monte Villa”), in 2008. We recorded an accrued liability for remaining lease termination costs at fair value, based on the remaining payments due under the lease and other costs, reduced by sublease rental income that could be reasonably obtained from the property, and discounted using a credit-adjusted risk-free interest rate. We use a credit-adjusted risk-free interest rate of 23%, and we based our estimated future payments, net of estimated future sublease payments, on current rental rates available in the local real estate market, and our evaluation of the ability to sublease the facility. Accrued restructuring, and in particular those charges associated with exiting a facility, are based upon management’s assumptions and estimates which are subject to changes in facts and circumstances. These estimates significantly impact the accrual and actual results may differ from our estimates. We review these estimates at least quarterly and when there are changes in facts or circumstances, and adjust our accrual if necessary.

Income Taxes

We account for income taxes under the asset and liability method under which deferred income taxes are provided for the temporary differences between the financial reporting basis and the tax basis of our assets and liabilities and operating losses and tax credit carryforwards. This process involves assessing the nature and measurements of temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities. In each period, we assess the likelihood that our deferred tax assets will be recovered from existing deferred tax liabilities or future taxable income. Factors we considered in making such an assessment include, but are not limited to, estimated utilization limitations of operating loss on tax credit carryforwards, expected reversals of deferred tax liabilities, past performance, including our history of operating results, our recent history of generating taxable income, our history of recovering net operating loss carryforwards for tax purposes and our expectation of future taxable income. If required, we will recognize a valuation allowance to reduce such deferred tax assets to amounts that are more likely than not to be ultimately realized. To the extent that we establish a valuation allowance or change this allowance, we would recognize a tax provision or benefit in the consolidated statements of operations. We use our judgment to determine estimates associated with the calculation of our provision or benefit for income taxes, and in our evaluation of the need for a valuation allowance recorded against our net deferred tax assets.

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Recently Issued Accounting Standards

In March 2010, the FASB ratified the final consensus that offers an alternative method of revenue recognition for milestone payments. The guidance states that an entity can make an accounting policy election to recognize a payment that is contingent upon the achievement of a substantive milestone in its entirety in the period in which the milestone is achieved. The guidance is effective for fiscal years, and interim periods within those years, beginning on or after June 15, 2010 with early adoption permitted, provided that the revised guidance is applied retrospectively to the beginning of the year of adoption. We have determined that the adoption of this guidance will not have a material effect on our consolidated financial statements.

In September 2009, the FASB revised the authoritative guidance for revenue arrangements with multiple deliverables. The guidance addresses how to determine whether an arrangement involving multiple deliverables contains more than one unit of accounting and how the arrangement consideration should be allocated among the separate units of accounting. The guidance is effective beginning January 1, 2011 with early adoption permitted. We have determined that the adoption of this guidance will not have a material effect on our consolidated financial statements.

Consolidated Results of Operations

Comparison of Annual Results of Operations

All amounts, except amounts expressed as a percentage, are presented in thousands in the following table.

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Comparison of Year Ended December 31, 2010 to the Year Ended December 31, 2009

Revenue. We had revenue from certain customers, as a percentage of total revenue, as follows:

License and other revenue. License and other revenue decreased by approximately $12.3 million in 2010 compared to $14.7 million in 2009. In 2009, license and other revenue was primarily from licensing our RNAi platforms including revenue of $7.5 million from Novartis and $5.0 million from Roche as well as a $1.0 million milestone payment received from Amylin, recognition of approximately $0.7 million in deferred revenue under the QOL agreement and revenue recognized under the asset purchase agreement with Par. In 2010 we recognized approximately $0.5 million in earn-out payments related to commercial sales of calcitonin-salmon nasal spray under our agreement with Par Pharmaceuticals. We entered into an amendment to our agreement with Par Pharmaceuticals under which Par also paid us a lump sum of $0.7 million in lieu of profit-sharing for the remainder of the earn out period, which we recognized as revenue in 2010. In 2010, we also recognized revenue of approximately $0.8 million related to the sale of our patent rights and technology related to carbetocin, a long-acting analog of oxytocin, a naturally produced hormone that may benefit individuals with autism, to Cypress Bioscience, Inc.

Research and Development. R&D expense consists primarily of salaries and other personnel-related expenses, costs of pre-clinical studies and clinical trials, consulting and other outside services, laboratory supplies, facilities costs and other costs. We expense all R&D costs as incurred. R&D expense increased approximately $3.2 million to $18.1 million in 2010 compared to $14.9 million in 2009, due primarily to the following:

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R&D expense by project, as a percentage of total R&D project expense, was as follows:

We expect our R&D expenses to increase in 2011 as we advance our RNAi-related projects, including our clinical trial for our product candidate for FAP.

Selling, general and administrative. Selling, general and administrative expense consists primarily of salaries and other personnel-related expenses to support our R&D activities, stock-based compensation for selling, general and administrative personnel and non-employee members of our Board, professional fees, such as accounting and legal, corporate insurance and facilities costs. The 3% increase in selling, general and administrative expenses in 2010 compared to 2009 resulted primarily from the following:

We expect selling, general and administrative expenses to decrease in 2011 compared to 2010 which included approximately $1.4 million in transaction costs related to the Cequent acquisition.

Restructuring. We have recorded restructuring charges related to our facilities consolidation and impairment of assets. Restructuring expense increased to approximately $3.5 million in 2010 compared to $0.5 million in 2009, due to the following.

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Interest and Other Income. In 2010 we recorded other income of approximately $0.2 million which consisted primarily of a grant under the Qualified Therapeutic Discovery Grant funds under section 48D of the Internal Revenue Code. In 2010, we also received payments for two Qualified Therapeutic Discovery Grants totaling approximately $0.5 million for Cequent Pharmaceuticals. Amounts to be received under these Cequent grants were included in prepaid and other assets on the schedule of acquired assets as of the date we acquired Cequent, July 21, 2010. Interest income in 2009 was approximately $5,000.

Interest and Other Expense. In November 2010, we issued warrants to purchase up to 686,260 shares of our common stock in consideration for amendments to certain of our Securities Purchase Agreements. The estimated fair value of the warrants of approximately $1.2 million was recorded as other expense and an increase in fair value liability of price adjustable warrants. In addition, in 2010 and 2009 we incurred interest expense on our notes payable and in 2009 on our capital leases. Although the average borrowings were lower in 2010, the 2010 interest expense amount increased over the prior year period due to amortization of debt issuance costs and non-cash amortization of the fair value of the warrants issued in connection with the notes payable, which were recorded as debt discount. We expect interest and other expense to decrease in 2011 as we have no borrowings outstanding.

Change in fair value liability for price adjustable warrants. We use the Black-Scholes-Merton option pricing model as our method of valuation for price adjustable warrants. The fair value liability is revalued each balance sheet date utilizing Black-Scholes-Merton valuation model computations with the decrease or increase in fair value being reported in the statement of operations as other income or expense, respectively. The net change in fair value liability for price adjustable warrants was income of approximately $4.4 million in 2010, compared to income of approximately $2.5 million in 2009. The income for 2010 is primarily due to a decrease in our stock price from $3.24 per share as of the beginning of the year compared to $1.55 per share as of December 31, 2010. The income for 2009 is due primarily to a decrease in the fair value of our warrants issued in June 2009, due to a decrease in our stock price from $7.64 as of the date of the issuance of the June 2009 warrants to $3.24 per share as of December 31, 2009. This income in 2009 was offset in part due to expense associated with an increase in the fair value of our warrants which were outstanding as of January 1, 2009. Our stock price increased from $1.32 per share as of the beginning of 2009 to $3.24 per share as of December 31, 2009, which increased the fair value liability for those particular warrants, which represented an expense for us.

Gain on settlement of liabilities, net. We recorded a net loss on settlement of liabilities of approximately $20,000 in 2010 and a net gain on settlement of liabilities of approximately $0.7 million in 2009. In 2010 we issued shares of our common stock to several of our vendors to settle amounts due of approximately $0.5 million in total, and as a result we recorded a net loss on settlement of liabilities. The 2009 net gain included a gain of approximately $0.7 million relating to the amendment of our agreement regarding severance obligations with our former Chief Scientific Officer, and a gain of approximately $0.2 million related to the issuance of shares of stock to certain of our vendors to settle amounts due. These 2009 gain amounts were partially offset by a lease termination fee of approximately $0.2 million incurred pursuant to the termination of our capital lease agreement.

Liquidity and Capital Resources

Cash flows

Our operating activities used cash of approximately $16.8 million in 2010, compared to $7.5 million in 2009. Cash used in operating activities relates primarily to funding net losses and changes in accounts payable and other accrued liabilities, deferred revenue, accrued restructuring and asset accounts, partially offset by

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non-cash changes in the fair value liability for price adjustable warrants and subscription investment units, non-cash restructuring charges, depreciation and amortization and stock-based compensation. We expect to use cash for operating activities in the foreseeable future as we continue our R&D activities.

Our investing activities provided cash of approximately $4.6 million in 2010, compared to $2.3 million in 2009. Changes in cash from investing activities result from changes in restricted cash, and purchases of property and equipment. In 2010, cash provided by investing activities was primarily the result of $5.1 million of cash acquired upon the acquisition of Cequent Pharmaceuticals. In 2009, cash provided by investing activities was primarily the result of the decrease in restricted cash of $1.3 million, which was used to pay down accrued restructuring lease liabilities, and approximately $1.2 million of proceeds from sales of equipment and other assets.

Our financing activities provided cash of approximately $12.5 million in 2010 compared to approximately $4.9 million in 2009. Changes in cash from financing activities are primarily due to issuance of common stock, warrants, and subscription investment units, proceeds and repayment of equipment financing facilities and notes payable and proceeds from exercises of stock options and warrants. We raised net proceeds of approximately $7.8 million in 2010 and $9.3 million in 2009 through offerings of shares of common stock and warrants and subscription investment units to purchase shares of common stock. We received proceeds of approximately $2.7 million from the exercise of warrants and options during 2010. We borrowed $3.0 million from Cequent to fund our operations prior to the merger. On July 21, 2010, we consummated the merger with Cequent, and as a result the loans of $3.0 million plus accrued interest were settled and the warrants to purchase our common stock which were issued to Cequent in connection with the Loan Agreement terminated. In 2010 we made payments on notes payable of approximately $1.0 million and in 2009, we made payments on notes payable, which were previously capital lease obligations, of approximately $5.5 million,

Recent Financing Activities

In February 2011, we received net proceeds of approximately $4.7 million in an underwritten public offering of 6,375,000 shares of common stock together with warrants to purchase up to 1,113,075 shares of common stock at a purchase price of approximately $0.80 per unit. The warrants are exercisable for seven years and have an exercise price of $0.80 per share. As a result of the issuance of common stock and warrants at a price of $0.80 per share, 687,500 outstanding warrants that were issued in June 2009 were repriced to $0.80 per share.

Summary

We believe that our current resources are sufficient to fund our planned operations into the second quarter of 2011. We based our estimate on our ability to perform planned R&D activities, and the receipt of planned funding. The market value and the volatility of our stock price, as well as general market conditions, could make it difficult for us to complete a financing transaction on favorable terms, or at all. Any financing we obtain may further dilute or otherwise impair the ownership interests of our current stockholders. If we fail to generate positive cash flows or fail to obtain additional capital when required, we could modify, delay or abandon some or all of our programs.

Off-Balance Sheet Arrangements

As of December 31, 2010, we did not have any off-balance sheet arrangements, as defined in Item 303(a)(4)(ii) of SEC Regulation S-K.

Not applicable.

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Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders

Marina Biotech, Inc.

We have audited the accompanying consolidated balance sheets of Marina Biotech, Inc. and subsidiaries (the “Company”) as of December 31, 2009 and 2010, and the related consolidated statements of operations, stockholders’ equity (deficit), and cash flows for each of the years in the two-year period ended December 31, 2010. These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Marina Biotech, Inc. and subsidiaries as of December 31, 2009 and 2010, and the results of their operations and their cash flows for each of the years in the two-year period ended December 31, 2010, in conformity with U.S. generally accepted accounting principles.

The accompanying consolidated financial statements have been prepared assuming that the Company will continue as a going concern. As discussed in Note 1 to the consolidated financial statements, the Company has incurred recurring losses and has an accumulated deficit, and has had recurring negative cash flows from operations, that raise substantial doubt about its ability to continue as a going concern. Management’s plans in regard to these matters are also described in Note 1. The consolidated financial statements do not include any adjustments that might result from this uncertainty.

Seattle, WA

March 23, 2011

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MARINA BIOTECH, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

See notes to consolidated financial statements

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MARINA BIOTECH, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

See notes to consolidated financial statements

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MARINA BIOTECH, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY (DEFICIT)