Genelabs Technology (GNLB) - Description of business

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Company Description
Genelabs Technologies, Inc., referred to as Genelabs or the Company, is a biopharmaceutical company engaged in the discovery and development of pharmaceutical products to improve human health. Our business objective is to develop a competitive advantage by focusing on drug targets for which we can rapidly optimize lead compounds, with the goal of developing drugs with significant market potential. In our drug discovery programs, which are presently concentrated on new treatments for infection with the hepatitis C virus, or HCV, we seek to identify compounds that have a distinct advantage over potential competitive compounds in potency, safety, and/or pharmacokinetic properties, with a goal of achieving “best-in-class” status. In addition, two separate development-stage projects have the potential to achieve “first-in-class” status: Prestara tm (prasterone), an investigational drug for systemic lupus erythematosus, referred to as SLE or lupus, and an investigational vaccine for hepatitis E virus, or HEV, that is being developed by GlaxoSmithKline under a license from us. The goal of our current drug discovery programs is to discover novel antiviral compounds for treatment of HCV, a disease which chronically infects 2.7 million people in the United States and for which there is a major need for new treatments. Beginning in early 2002, Genelabs initiated work on two projects directed at inhibiting HCV infections by targeting the viral specific enzyme, HCV RNA-dependent RNA polymerase, also known as NS5b or HCV polymerase. In one of these projects we have employed a class of compounds known as nucleoside analogues that can interfere with HCV polymerase activity so that the polymerase makes incomplete copies of the HCV virus genome. The second polymerase project uses a different class of chemicals, referred to as non-nucleosides, designed to directly bind to the HCV polymerase and prevent the polymerase from properly functioning. During 2005, Genelabs continued drug discovery and development work on compounds from both projects and discovered a new class of non-nucleoside compounds that demonstrated an even greater level of potency in cell-based models than a preclinical development compound that we identified earlier. We conduct our work in the nucleoside program under a research collaboration and license agreement with Gilead Sciences, Inc. that we entered into in 2004. Gilead currently funds Genelabs’ HCV polymerase nucleoside discovery research and is responsible for preclinical development activities on the nucleoside project. Genelabs currently is conducting discovery and preclinical development activities on its HCV non-nucleoside polymerase project without a corporate partner, although we may ultimately enter into a collaboration with another company that has more resources than Genelabs. In 2005, we initiated a project to screen and optimize compounds directed against another HCV target, NS5a. Genelabs also has pursued regulatory approval of an investigational drug for women with systemic lupus erythematosus. This compound is a form of prasterone which we call Prestara tm .   No new drug has been approved in the United States for treatment of SLE in well over 40 years and current therapies are not adequate. Although the most recent of Genelabs’ Phase III clinical trials of Prestara did not meet its primary endpoint, the U.S. Food and Drug Administration, or FDA, has indicated that they may review a New Drug Application, or NDA, for treating the signs and symptoms of lupus based on an additional, positive phase III clinical trial that meets their criteria. In addition to these primary programs focused on drug discovery and development, we have established a portfolio of patents and patent applications based on inventions arising from our other research and development activities. We have granted licenses to third parties under our intellectual property portfolio, including under patents covering the hepatitis E virus, hepatitis G virus and a nucleic acid amplification technology known as LADA, and we may seek to grant additional licenses under these or other patents we own. On March 15, 2006, Genelabs had cash, cash equivalents and restricted cash of approximately $8.3 million, which we expect can sustain existing operations only into the beginning of the fourth quarter of 2006. As a result, there is substantial doubt as to the ability of Genelabs to continue as a going concern absent a substantial increase in cash from a new corporate partnership or sale of equity securities. In addition, Genelabs does not currently satisfy the listing requirements of the Nasdaq Capital Market, requiring a minimum shareholder’s equity balance and/or market capitalization level, which could result in the delisting of Genelabs from that exchange. Drug Discovery Research Genelabs’ core research capabilities include medicinal chemistry, combinatorial chemistry, computational modeling, molecular biology, assay development and high-throughput screening, drug metabolism and pharmacokinetics. For the past several years, HCV has been the primary focus of our drug discovery efforts. In the future we may seek to expand our drug discovery efforts to encompass additional targets. Genelabs’ research concentrates on small molecules, which can be administered orally and which generally are relatively simpler to manufacture than larger biological molecules such as peptides, antibodies or proteins. Drug Discovery Process.   Genelabs’ drug discovery strategy focuses on screening for compounds that affect biological targets which previously have been shown to be useful in controlling disease activity, and then optimizing the pharmacologic properties of those compounds by systematically making changes in the original compound and testing for improved properties. We choose targets for diseases where there is a large unmet medical need which can be addressed by the kinds of chemical compounds with which we have experience. These targets generally are for infectious disease, such as the hepatitis C virus, where we have substantial prior experience, but future targets may involve other diseases. Generally, we begin by establishing tests, or assays, to screen potential drug candidates that may have activity against the target. Thousands of compounds may be evaluated using high-throughput screening techniques to identify suitable starting compounds. Using these starting compounds, a systematic process is then conducted to optimize the compounds to develop lead compounds which have the potency, pharmacokinetic properties, toxicity profile, manufacturability, patentability and other characteristics to be good drug candidates. The optimization process is tasked to a team of scientists comprised of both chemists and biologists. This team is focused on synthesizing variations of the starting compounds, testing them in assays, and analyzing the resulting data. The analysis adds to our understanding of structure-activity relationships, which are used to strategize further modifications to the compounds. This cycle then is repeated. During this process, we benchmark our compounds against known competitors with the objective of optimizing our compounds so they have an advantage in potency, safety and/or other pharmaceutical properties. If the optimization program is successful in synthesizing a compound meeting our pre-determined criteria, it is advanced into early pre-clinical development to develop further data on pharmacokinetics and toxicity, and to further optimize the process of synthesizing the compound. If such data are positive, Genelabs may continue development into the formal pre-clinical phase which involves tests meeting Good Laboratory Practices, or GLP, standards of the FDA. If this data is positive, Genelabs may seek to file an Investigational New Drug Application, or IND, and begin human clinical trials. Because the risk is high that a compound may fail in pre-clinical or clinical testing, Genelabs continues the optimization process in order to discover and develop additional compounds that may meet the pre-determined criteria. At any stage of development, Genelabs may seek to out-license the compound, or the program under which it has been developed, to a pharmaceutical or larger biotechnology company, which could then take over the development process. Alternatively, Genelabs may elect to retain development of promising compounds in order to seek to realize additional value, although further development involves risk that the compounds may fail due to toxicity, lack of efficacy or other reasons. Hepatitis C Virus.   HCV is an infectious and potentially fatal virus that can be contracted through blood and bodily fluid contact. The virus attacks the liver and can cause liver inflammation, and eventually liver scarring, liver failure and liver cancer. In most cases, the body is not able to fight off the infection and the infected individual becomes a chronic carrier of HCV. Most people with chronic HCV infection have no symptoms for many years and are unaware that they carry this potentially deadly virus. Because they are asymptomatic carriers, these infected people can unknowingly infect others. According to the World Health Organization, as many as 170 million people worldwide have chronic HCV infection, of which 5 to 10 million are in Europe. The United States Centers for Disease Control and Prevention, or CDC, estimates that approximately 2.7 million people in the U.S. are chronically infected with HCV. According to the CDC, each year in the United States approximately 25,000 people become newly infected with HCV and approximately 8,000 to 10,000 people die from complications of hepatitis C. Liver failure resulting from chronic HCV infection is now recognized as the leading cause of liver transplantation in the United States. Currently, there is no approved vaccine to prevent hepatitis C. The standard of care for treatment of HCV is a combination of interferon alfa-2 and the nucleoside analogue ribavirin, typically given over a number of months, with interferon injected once weekly and ribavirin given orally once daily. This treatment regimen is only effective in approximately half of the patients infected with HCV genotype 1, the genotype most prevalent in the United States. The interferon/ribavirin treatment has significant toxicities, most importantly severe anemia and psychiatric effects. There are no other drugs or biologics approved by the FDA for treatment of HCV. As a consequence, the pool of patients who are unresponsive to the currently approved treatment continues to grow each year. Because a significant need exists for improved treatment options, Genelabs believes the future market for HCV drugs will be large. Because of the significant market potential and unmet medical need, Hoffmann La-Roche and Schering-Plough Corporation, who are manufacturers of currently approved HCV drugs, along with other pharmaceutical companies such as Merck & Co., Inc. and Boehringer Ingelheim GmbH, biotechnology companies such as Gilead Sciences, Inc., ViroPharma Incorporated, Idenix Pharmaceuticals, Inc. and Vertex Pharmaceuticals, Inc., among others, and academic and government organizations, are conducting research and development in competition with Genelabs for discovery and development of various other compounds to treat HCV infection. These companies generally have greater resources than Genelabs and, in some cases, have product candidates that are in a more advanced stage of development than Genelabs’ drug candidates. Because HCV rapidly mutates, we believe future therapy may consist of multiple drugs that function by different mechanisms, in an attempt to overcome the emergence of HCV strains that are resistant to treatment. This is similar to the treatment paradigm currently employed in the management of patients with HIV infection, another chronic viral infection. As a consequence, Genelabs has initiated multiple projects in the HCV area, seeking to discover orally-active drugs that function by distinct mechanisms, which we believe eventually may be given in combination to patients with HCV infection. Our HCV programs have focused on different mechanisms of inhibiting the replication of the HCV virus. Two of these approaches target a viral-specific enzyme which is called the HCV NS5b RNA-dependent RNA polymerase. This enzyme is directly involved in HCV replication. We believe the NS5b enzyme is an attractive target for creating HCV-specific drugs because: (1) a proper functioning of the polymerase is required for HCV replication; (2) human cells do not use this viral polymerase for their own replication; and (3) drugs that target viral polymerases have proven to be effective for treating other viral infections, such as HIV. In one project we have employed a class of compounds known as nucleoside analogues that cause the HCV polymerase to make incomplete copies of the HCV genome, thereby curtailing viral replication. Another separate project uses a different class of chemicals that bind directly to the HCV polymerase and prevent it from properly functioning, which also curtails viral replication. Since initiating our HCV discovery programs, we have:   •  established a high-throughput cell-free enzyme assay for HCV RNA polymerase;     •  established a cell-based assay which measures replication of an engineered HCV (known as a replicon);     •  synthesized a large number of compounds and tested them for activity;     •  identified compounds that show potent inhibition of the HCV polymerase in our assays and that satisfy our toxicity limits when used in human cells;     •  written and submitted multiple patent applications claiming compounds with activity against HCV;     •  initiated preclinical studies in both HCV polymerase research projects;     •  selected two of the non-nucleoside compounds for advancement into IND-enabling preclinical development in advance of potential human testing; and     •  entered into a contract with an outside supplier to enable production of a sufficient quantity of preclinical compounds under current Good Manufacturing Practice (cGMP) conditions, to enable us to undertake IND-enabling preclinical studies. We also continue to synthesize additional compounds to serve as potential follow-up candidates for preclinical development for HCV. In addition to the HCV NS5b polymerase as a target, in early 2005 Genelabs began a research project involving a different HCV target that is known as HCV NS5a. HCV NS5a is a different protein that is believed to be essential for HCV viral replication, although its exact function is not known. Our initial screening process identified starting compounds which were suitable for our optimization process, and we have since synthesized hundreds of compounds designed for this target, a number of which have demonstrated nanomolar-level activity in an HCV replicon cell-based model. We have recently begun evaluating these compounds for their drug metabolism and pharmacokinetic properties as we seek to determine whether they are eligible for advancement into preclinical development. Genelabs continues to evaluate other HCV targets as well as targets for other diseases. We may choose to implement programs with other drug targets in addition to or instead of our existing programs. Licensing of HCV Nucleosides.   In September 2004, we signed an agreement with Gilead Sciences, Inc. to collaborate in the research, development and commercialization of nucleoside inhibitors of the HCV polymerase. We are leading the research efforts and Gilead will lead development and commercialization efforts. Gilead paid us a nonrefundable $8 million upfront payment and is providing research funding of approximately $11 million over a three-year research term, which commenced in October 2004. We have agreed to devote a specified number of scientists to this program and have provided Gilead exclusive worldwide access to certain compounds developed in the program. Gilead has the option to continue funding the collaboration for one additional year after completion of the initial three-year research term. We are entitled to milestone payments of up to $38 million for each compound that is developed by Gilead under the agreement and royalties on any net sales of products developed under the collaboration. Development of Prestara for Systemic Lupus Erythematosus Our clinical development efforts have been concentrated on Prestara tm (prasterone), an investigational drug for systemic lupus erythematosus. Lupus is a life-long autoimmune disease that causes the immune system to attack the body’s own tissues and organs. In August 2002, we received an approvable letter for Prestara, also referred to as GL701, Aslera tm and Anastar tm , from the U.S. Food and Drug Administration, or FDA, but to date we have not met the primary contingency contained in the letter, requiring additional positive phase III clinical trial data on the effects of Prestara on bone mineral density, or BMD. In December 2005, we met with the FDA to discuss our potential development options for Prestara. This meeting was held after we received the results of three clinical trials, two double-blind phase III studies and one open-label follow-on study, that were conducted measuring BMD in women with lupus who were taking glucocorticoids. The meeting with the FDA was held to enable Genelabs to determine the potential paths forward for Prestara, including 1) pursuit of an indication for the treatment of the signs and symptoms of lupus and 2) pursuit of an indication for the prevention of loss of BMD in lupus patients taking glucocorticoids. We had pursued the BMD indication with the FDA since receiving an approvable letter in 2002, although we remained interested in an indication for treating the signs and symptoms of lupus, due to its potentially broader application. As a result of the meeting, the FDA indicated that at least one additional, adequate, well-controlled phase III clinical trial would be necessary to support an indication for the treatment of the signs and symptoms of lupus. The FDA further indicated that Genelabs should refer to the FDA’s draft guidance for developing drugs for SLE, which was published earlier in 2005, and that it would be willing to work with Genelabs in designing such a study. Genelabs currently believes that pursuing an indication for the treatment of the signs and symptoms of lupus is a more viable route forward than continuing to pursue an indication for prevention of bone mineral density loss in patients with lupus. Lupus and the Clinical Rationale Behind Prestara tm   According to various published estimates, lupus affects approximately 200,000 patients in the United States, and Genelabs believes that there are at least one million patients worldwide. Lupus is a severe, chronic and frequently debilitating autoimmune disease that primarily affects women, who generally are diagnosed while of childbearing age. Lupus is characterized by alternating periods of active disease symptoms, or flares, and periods of quiescence, and it can cause significant morbidity and disruption of daily activities. Inflammation occurs in nearly all patients, and symptoms can include irreversible damage to almost every organ system, including the musculoskeletal, renal, pulmonary, neurological, cardiovascular, and cutaneous systems, as well as depression and severe fatigue. In the United States, there have been no new drugs approved by the FDA for the treatment of lupus in more than 40 years. Existing treatments for lupus are often inadequate, due to limited benefits and severe adverse side effects. Prestara is a pharmaceutical formulation for oral administration that contains highly purified prasterone, the synthetic equivalent of dehydroepiandrosterone, or DHEA, a naturally occurring hormone and the most abundant adrenal hormone in humans, as the active ingredient. Lupus patients generally have abnormally low levels of DHEA, approximately 50% of normal, and it is believed that hormonal influences may play a role in the development and progression of the disease. Background of Prestara’s Development.   Genelabs obtained an exclusive license to the rights to Prestara for use in SLE from Stanford University in 1993, and we have since completed three double-blind randomized placebo controlled clinical trials of Prestara in women with lupus. The first of these clinical trials, designated Study GL94-01, was completed in 1997 and evaluated Prestara’s ability to reduce the glucocorticoid, or steroid, dose in women with mild to moderate lupus who were dependent on steroids to prevent their disease from exacerbating. The study’s objective was to reduce the steroid dose in these women while simultaneously maintaining or improving the patients’ lupus disease activity. Prior to initiating treatment in the study, all 191 women with SLE in this trial previously required glucocorticoids at doses of 10 to 30 mg per day in order to stabilize their disease. During the study period, patients in the trial received daily doses of 200 mg of Prestara, 100 mg of Prestara or placebo for seven to nine months. The primary endpoint of this trial was a sustained reduction in each patients’ glucocorticoid dose to 7.5 mg per day or less, which are levels approximately equivalent to those normally produced by the adrenal glands. Data from the trial showed that patients who received the 200 mg daily doses of Prestara had a higher response rate than patients who received placebo, particularly for those patients with active disease at baseline. The results of this study were published in the July 2002 issue of Arthritis and Rheumatism. A second phase III clinical trial, Study GL95-02, was completed in 1999 and evaluated Prestara’s ability to improve or stabilize clinical outcome and disease symptoms in women with mild to moderate lupus. The 381 women with SLE enrolled in this trial were randomized to receive either an oral dose of 200 mg of Prestara or placebo once a day for 12 months. All placebo and Prestara patients were allowed to continue taking their existing medications for the full course of this trial. The primary endpoint of the trial was “responder”, and responders were patients who experienced no clinical deterioration while demonstrating simultaneous improvement or stabilization over the duration of the study across two disease activity measures, the SLE Disease Activity Index (SLEDAI) and Systemic Lupus Activity Measure (SLAM), and two quality of life measures, the patient global assessment and the Krupp Fatigue Severity Scale (KFSS). In other words, in order for a patient in the trial to be considered a “responder”, over a one-year term they had to be stable or improved in four separate measures without any additional medications (besides the study medication) or disease worsening. In an intent-to-treat analysis of patients with active disease at baseline, Prestara-treated patients showed a 31% greater rate of response than the placebo group: 59% of Prestara patients responded to treatment compared to 45% of placebo patients. This improvement in response was statistically significant (p=0.017). In late 2002 the FDA advised Genelabs that it considers Study GL95-02 to be a positive, adequate and well-controlled study. The results of this study were published in the September 2004 issue of Arthritis and Rheumatism. Because the most common organ damage in patients with lupus is musculoskeletal, nested within Study GL95-02 was a study conducted at eight of the investigator sites to assess BMD in patients who were required to have been taking glucocorticoids for at least six months prior to entering the trial. These patients had BMD measurements taken by Dual X-ray Absorptiometry (DEXA) at the beginning and end of the trial. An analysis of the results including all patients who had baseline and post-treatment bone mineral density measurements showed that the group of patients receiving Prestara had significantly increased bone mineral density, compared to a decrease in bone density for the group of patients on placebo. Between the Prestara and placebo treatment groups, the differences were statistically significant (measured by mean percentage change; 55 patients, p=0.003 at the lumbar spine and 53 patients, p=0.013 at the hip). Lupus patients are at risk for the long-term complication of osteoporosis both because loss of bone density is a common manifestation of the disease and because a significant side effect of current lupus therapies is decreased bone density. Prestara NDA.   Upon completion of GL95-02, Genelabs prepared a New Drug Application, or NDA, for Prestara to treat women with lupus, which was submitted to the FDA on a rolling basis under fast-track designation in 2000. We subsequently received priority review designation from the FDA. The FDA Arthritis Advisory Committee reviewed the NDA on April 19, 2001, but did not vote on whether to recommend approval of Prestara. On June 26, 2001, the FDA sent us a letter stating that the Prestara NDA was not approvable, listing deficiencies that must be addressed before the NDA can be approved. As a result of various meetings with us, the FDA sent us a letter in January 2002 suggesting exploration of additional data and analyses regarding Prestara’s positive effect on BMD, that was observed in Study GL95-02. We submitted the requested information to the FDA in February 2002. On August 28, 2002, we received an approvable letter from the FDA. The approvable letter indicated that approval of the NDA was primarily contingent upon the successful completion of an additional clinical trial providing sufficient evidence to confirm the positive effect on BMD that was observed in women with SLE while on glucocorticoids in Genelabs’ Study GL95-02. To address this requirement, Genelabs designed and completed an additional multi-center, randomized, placebo-controlled, double-blind clinical trial, designated Study GL02-01. The primary endpoint in this study was BMD at the lumbar spine and 155 women with SLE receiving glucocorticoids were enrolled and treated with either 200 mg per day Prestara or placebo at 26 sites. Study GL02-01, in which the treatment duration was six months, did not meet its primary objective of showing improvement in BMD, although there was a trend in favor of Prestara. Patients competing Study GL02-01 were eligible to enroll in Study GL03-01, a one-year open-label follow-on study. Study GL03-01 met its primary objective of maintaining BMD for the patients taking 200 mg per day of Prestara. In the combined studies GL02-01 and GL03-01, patients taking 200 mg per day of Prestara for 12 to 18 months increased their BMD. A separate nine month clinical trial of prasterone measuring BMD was conducted by Genovate Biotechnology Co., Ltd., referred to as Genovate, a Taiwan-based company that has a license from us for Prestara in Asian countries, except Japan. The Genovate study also did not demonstrate a statistically significant increase in the BMD of women with lupus taking glucocorticoids. Following the clinical trials measuring BMD, Genelabs met with the FDA to discuss future development options for Prestara for lupus. Genelabs and the FDA discussed development for two different possible indications — 1) treatment of the signs and symptoms of lupus and 2) prevention of loss of BMD for women with lupus on glucocorticoids. For both indications the FDA indicated that additional positive clinical trial data would be needed before the FDA would review a New Drug Application for approval. For the treatment of the signs and symptoms of lupus, the FDA indicated that one additional positive clinical trial could be sufficient. Genelabs currently believes that pursuit of an indication for treating the signs and symptoms of lupus is a more viable route forward for Prestara than pursuit of an indication for BMD, which we had pursued since receipt of the approvable letter in 2002. The Company plans to meet with the FDA and obtain agreement on a protocol for an additional study of Prestara for lupus, with treatment of signs and symptoms of the disease as the objective of the study, although Genelabs presently does not have the funds to conduct the trial on its own. International Regulatory Applications.   Independent of the United States regulatory process, Genelabs filed and subsequently withdrew a Marketing Authorization Application, or MAA, seeking approval of Prestara for the treatment of SLE in Europe. We retain the option to file an application for approval again at a later date. In Japan, our licensee, Tanabe Seiyaku, Co., Ltd., or Tanabe, is responsible for pursuing approval of Prestara and for conducting and funding any associated studies that may be required, however, they have indicated that their development plans for Prestara will be determined after there has been further clarity regarding the development of Prestara in the United States. Market Position and Competition.   Genelabs has exclusive rights under U.S. patents granted to Stanford for the use of DHEA to treat SLE. Because DHEA is a long-known naturally occurring hormone, Genelabs believes there are no composition-of-matter patents on generic DHEA, although the company has submitted patent applications pertaining to the specific polymorphic form of DHEA used in its most recent clinical trials. Genelabs has received a Notice of Allowance for a U.S. patent application claiming a high-purity composition of that DHEA polymorphic form. In addition to the patents licensed from Stanford, two U.S. patents were issued to Genelabs during 2003, one of which relates to the measurement of patients’ response to treatment of SLE with DHEA and the other to the use of DHEA for treating subnormal bone mineral density. The FDA has granted orphan drug status to Prestara for the treatment of SLE disease in women, which, if Prestara were to be approved for marketing with that indication, would provide up to seven years of U.S. marketing exclusivity. We are pursuing additional patent applications relating to DHEA or its use in treating SLE both in the United States and internationally. We do not have issued patents on DHEA, or its use, in Europe or Japan. Currently, products containing DHEA are available as dietary supplements in the United States. Genelabs believes that the government should regulate DHEA as a drug and has submitted a petition and supporting documentation to the FDA seeking DHEA’s removal from the market as a dietary supplement. The FDA has not taken any action on our petition. If Prestara were approved to for treatment of lupus, we believe Prestara would compete against existing and future drugs that are used to treat SLE, such as hydroxychloroquine sold by Sanofi-Aventis and others. Licensing of Prestara tm .  We licensed exclusive rights to Prestara for North America to Watson Pharmaceuticals, Inc., under an agreement which would provide Genelabs with milestone payments and a significant royalty percentage on product sales if the FDA approves the Prestara NDA for SLE. The agreement provides for milestone payments for approval of Prestara by the FDA for each of two indications, treatment of lupus and reduction of steroids. Currently, we are not seeking approval for steroid reduction. Exclusive rights for Japan have been licensed to Tanabe in exchange for milestone payments and royalties on any net sales of Prestara in Japan. Exclusive rights for Asia (excluding Japan), Australia and New Zealand have been licensed to Genovate Biotechnology Co., Ltd., referred to as Genovate, in exchange for an equity position in Genovate. Genelabs also has licensed rights to Teva Pharmaceutical Industries Ltd. to market Prestara in Israel, Gaza and the West Bank and, if Prestara is approved in the U.S. and Israel, Genelabs will receive milestone payments and royalties from Teva. We intend to continue to pursue licensing the European marketing rights. Genovate Biotechnology Co., Ltd.   Genelabs holds approximately 8% of the equity in Genovate, a Taiwan-based company, which was formerly called Genelabs Biotechnology Co., Ltd. Genovate develops, manufactures and distributes pharmaceutical products in Asia and holds the rights to market Prestara tm in Asia (except Japan), Australia and New Zealand. In addition to our clinical trials, Genovate has conducted two Phase III clinical trials of prasterone in Taiwan. Since the founding of Genovate, we periodically have sold portions of our equity in Genovate, and we may sell additional portions of our equity in Genovate as regulations in Taiwan and market conditions permit. The chairman of our board of directors, Irene A. Chow, Ph.D., also serves on the board of directors of Genovate. Hepatitis E Vaccine Background.   Infection with the hepatitis E virus, or HEV, can cause severe and prolonged illness, with symptoms similar to hepatitis A including fever, jaundice and nausea, although HEV is generally more severe than hepatitis A. HEV is transmitted through contaminated water or food. The World Health Organization estimates that the overall mortality rate from HEV infection ranges between 0.5% to 4% and states that when fulminant hepatitis E occurs in pregnancy it regularly induces a mortality rate of 20% among pregnant women in the 3rd trimester. Large outbreaks have occurred in developing countries but cases in the U.S. are rare and usually associated with travel to developing countries. There is neither a specific treatment nor an approved vaccine for the prevention of HEV. HEV was first isolated and cloned by Genelabs scientists working in conjunction with researchers from the U.S. Centers for Disease Control and Prevention. U.S. and foreign patents that broadly claim HEV genomes, DNA fragments and their encoded proteins have been issued to Genelabs. HEV Licenses.   In 1992 Genelabs granted GlaxoSmithKline, or GSK, an exclusive worldwide royalty-bearing license to make, use and sell HEV vaccines. GSK is developing an HEV vaccine candidate and has completed two Phase I trials and one Phase II trial. The Phase I trials were conducted in the U.S. and in Nepal, enrolling 88 and 44 volunteers, respectively. Both of these trials demonstrated that the investigational HEV vaccine appeared to be safe at various doses to normal human volunteers and generated an antibody response to the vaccine antigen. The Phase II trial was conducted by the Walter Reed Army Institute of Research, or WRAIR, in collaboration with the Medical Department of the Royal Nepal Army, the U.S. National Institutes of Health and GSK. It enrolled approximately 2,000 adults in Nepal who received three doses of either HEV vaccine or placebo over a six month period, with a follow-up period of 18 months after the last dose. Based on the results of this trial GlaxoSmithKline made a milestone payment to Genelabs in November 2004. In December 2005, scientists from WRAIR presented the results of the HEV vaccine phase II trial for the first time at an annual meeting of the American Society of Tropical Medicine and Hygiene. The presentation indicated that the clinical trial showed a 96% effectiveness of the vaccine in preventing disease caused by the hepatitis E virus. There were a total of 69 cases of HEV during the course of the trial after all three doses of the vaccine or placebo had been administered, and 66 of these cases were in the placebo group compared to 3 in the vaccine group. In addition, the data presented indicated that the vaccine was well tolerated, with no significant adverse safety events attributed to the vaccine during the course of the study. In addition to GlaxoSmithKline’s vaccine license, Genelabs has granted non-exclusive royalty-bearing licenses to develop and commercialize diagnostic products for HEV to Abbott Laboratories and to MP Biomedicals Asia Pacific Pte. Ltd., a former subsidiary of ours that used to be named Genelabs Diagnostics Pte. Ltd. Legacy Technologies Linker-Aided DNA Amplification.   In 2000 the United States Patent and Trademark Office granted Genelabs a patent covering a fundamental nucleic acid amplification technique developed by our scientists. This technology is a method of amplifying nucleic acids by attaching oligonucleotide linkers to the ends of target DNA sequences (Linker-Aided DNA Amplification, or LADA). In LADA, linkers of known sequences are added to the ends of target DNA sequences, thereby providing a known primer sequence that is complementary to the attached linkers. The primers are then used to amplify the target DNA, the precise sequence of which need not be known. In 2002 we non-exclusively licensed the LADA technology to Affymetrix, Inc. for upfront and annual fees, and royalties. In December 2004, the license was amended to provide Affymetrix with a paid-up license in return for a lump sum payment of $1.25 million. Genelabs currently does not utilize the LADA technology and our goal is to monetize the value of the LADA patents through licensing or other means. Hepatitis G Virus.   Scientific publications have shown that patients infected with both the human immunodeficiency virus, HIV, and GB virus C, also known as hepatitis G virus, or HGV, have a reduced mortality rate compared to those only infected with HIV. Genelabs scientists first discovered HGV, which is transmitted by blood and other bodily fluids, while seeking to identify what was then an unknown hepatitis virus. Patents covering the HGV genome, peptides and their uses have issued to Genelabs. We have granted non-exclusive research licenses to academic institutions to facilitate their continuing research on the interaction between HGV and HIV, although we retain commercial rights to HGV, such as vaccine or therapeutic applications of the virus. We have also granted Roche Diagnostics, Chiron Corporation and Ortho Diagnostic Systems royalty-bearing license agreements for diagnostic applications of HGV. To date, royalties received under these HGV agreements have not been significant, and we do not foresee receiving significant royalties in the near future. Although the presence of HGV has been detected in blood samples contained in the U.S., Europe, Japan and elsewhere, to date there are no known diseases specifically caused by HGV and no assays developed for screening the blood bank supply. HCV Diagnostic Licenses.   After its discovery of certain polypeptide regions of HCV, Genelabs entered into a royalty-bearing license agreement with Pasteur Sanofi Diagnostics, which was acquired by Bio-Rad Laboratories, Inc. in 1999. We have also granted certain rights to our HCV patents to Chiron Corporation and Ortho Diagnostic Systems. The agreements with Chiron and Ortho do not provide for royalties and we receive royalties from Bio-Rad pursuant to the terms of the Pasteur Sanofi license. Antimicrobial Drug Discovery.   Our earlier drug discovery efforts initially explored DNA as a target for drug intervention. Under this program we identified a number of small molecule lead compounds that showed activity against pathogenic fungi and bacteria, and promoted one lead compound with potent activity against Aspergillus fumigatus to preclinical status. However, we have been unable to license this compound and no longer are devoting resources to seeking further development of this or other DNA-binding compounds. In early 2005 we began a small exploration program on a potential antibacterial target, but have since redirected the resources from this program to our HCV NS5a drug discovery program. Patents Genelabs seeks patent protection for its proprietary technologies and potential products in the U.S. and internationally. We own over 50 issued U.S. patents; these patents cover our novel drug discovery technologies, Prestara, our HEV and HGV discoveries, and other proprietary technologies. We also own corresponding international patents that cover similar claims to our U.S. patents. Genelabs also has exclusive and non-exclusive licenses under a number of patents and patent applications owned by third parties. In addition, we possess many pending patent applications covering our novel chemistries and drug discovery technologies and other proprietary technologies, but cannot estimate how many of these pending patent applications, if any, will be granted as patents. Genelabs ® and the Genelabs logo are registered trademarks, and Prestara tm , Anastar tm and Aslera tm are trademarks of Genelabs Technologies, Inc. This Annual Report on Form 10-K also includes trade names and trademarks of companies other than Genelabs. Government Regulation The research and development, preclinical testing and clinical trials, manufacture, distribution, marketing and sales of human pharmaceutical and medical device products are subject to regulation by the FDA in the U.S. and by comparable authorities in other countries. These national agencies and other federal, state and local entities regulate, among other things, research and development activities and the testing, manufacture, safety, effectiveness, labeling, storage, record keeping, approval, advertising and promotion of the products that we are developing. Research and Development.   Our research and development programs involve the use of hazardous chemical, radiological and biological materials, such as infectious disease agents. Accordingly, our present and future business is subject to regulations under state and federal laws regarding work force safety, environmental protection and hazardous substance control and to other present and possible future local, state and federal regulations. Pre-Clinical Testing.   In the U.S., prior to the testing of a new drug in human subjects, the FDA requires the submission of an Investigational New Drug application, or IND, which consists of, among other things, results of preclinical laboratory and animal tests, information on the chemical compositions, manufacturing and controls of the products, a protocol, an investigator’s brochure and a proposed clinical program. Preclinical tests include laboratory evaluation of the product and animal studies to assess the potential safety and efficacy of the product and its formulation. Unless the FDA objects, the IND becomes effective 30 days after receipt by the FDA. FDA objection to the initiation of clinical trials is not uncommon, and the FDA may request additional data, clarification or validation of data submitted, or modification of a proposed clinical trial design. Clinical Trials.   Clinical trials are conducted in accordance with protocols that detail the objectives and designs of the study, the parameters to be used to monitor safety and the efficacy criteria to be evaluated. Each protocol is submitted to the FDA as part of the IND. Each clinical study is conducted under the auspices of an Institutional Review Board, or IRB. The IRB will consider, among other things, ethical factors, the informed consent and the safety of human subjects and the possible liability of the institution. Clinical trials are typically conducted in three sequential phases, although the phases may overlap. In Phase I, the initial introduction of the drug into human subjects, the product is tested for safety, dosage tolerance, absorption, metabolism, distribution and excretion. Phase II involves studies in a limited patient population to (i) determine the efficacy of the product for specific, targeted indications, (ii) determine dosage tolerance and optimal dosage and (iii) identify the common short-term adverse effects and safety risks. When Phase II evaluations indicate that a product is effective and has an acceptable safety profile, two Phase III trials are normally required to further test for safety and efficacy within an expanded patient population at multiple clinical sites. Manufacturing.   Each manufacturing establishment must be determined to be adequate by the FDA before approval of product manufacturing. Manufacturing establishments are subject to inspections by the FDA for compliance with current Good Manufacturing Practices and licensing specifications before and after an NDA has been approved, and international manufacturing facilities are subject to periodic FDA inspections or inspections by the international regulatory authorities. Marketing and Distribution.   The results of product development, pre-clinical studies and clinical studies are submitted to the FDA as part of the NDA for approval of the marketing and commercial shipment of a new drug. The FDA may deny approval if applicable regulatory criteria are not satisfied or may require additional clinical or other testing. Even if additional testing data are submitted, the FDA may ultimately decide that the NDA does not satisfy the criteria for approval or it may limit the scope of any approval it does grant. Product approvals may be withdrawn if compliance with regulatory standards is not maintained or if problems occur or are first discovered after the product reaches the market. The FDA may also require post-approval testing and surveillance programs to monitor the effect of products that have been commercialized and has the power to prevent or limit further marketing of the product based on the results of these post-marketing programs. Sales.   Sales of medicinal products outside the U.S. are subject to regulatory requirements governing human clinical trials and marketing for drugs and biological products. The requirements vary widely from country to country. The process of obtaining government approval for a new human drug or biological product usually takes a number of years and involves the expenditure of substantial resources. Sale of Diagnostic Business Genelabs Diagnostics Pte. Ltd.   In April 2004, we sold our diagnostics business, Genelabs Diagnostics Pte. Ltd. and its immediate parent company, Genelabs Asia Pte. Ltd., to MP Biomedicals, LLC, and received proceeds from the sale of $3.0 million. Prior to the sale, we accounted for our diagnostics business as a discontinued operation. Employees As of December 31, 2005, Genelabs and its subsidiaries had approximately 66 full-time equivalent employees, of whom 50 were involved in research and development and 16 were in administration. Our employees are not represented by any collective bargaining agreements, and we have never experienced a work stoppage due to a labor dispute. Item 1A.    Risk Factors There are a number of risk factors that should be considered by Genelabs’ shareholders and prospective investors. It is not possible to comprehensively address all risks that exist, but the following risks in particular should be considered, in addition to other information in this Annual Report on Form 10-K. Risks Related to Genelabs We will need to raise additional capital within the next several months, and if we are unable to timely secure adequate funds on acceptable terms, we will be required to cease our operations and will not be able to continue as a going concern. On March 15, 2006, Genelabs had cash and cash equivalents totaling approximately $8.3 million, which we presently estimate can sustain our existing operations only until the beginning of the fourth quarter of 2006. We will need to raise additional capital in order to execute our business plans, provide adequate working capital to satisfy our obligations and continue as a going concern. While we are in the process of seeking additional funds, including entering into a new collaboration for our hepatitis C virus drug discovery program, selling equity, renegotiating an existing corporate collaboration, and/or other arrangements, it is possible that none of these efforts to seek additional funds will be successful. If these efforts are not successful we will need to terminate operations and you may lose your entire investment. If one or more of these efforts are successful, the amount of funds we raise may still not be sufficient for us to sustain operations as planned or at all. As of the date of this filing, there is substantial doubt about the Company’s ability to continue as a going concern due to its historical negative cash flow and because the Company does not currently have sufficient committed capital to meet its projected operating needs for at least the next twelve months. Additionally, our financial condition may lead our vendors and suppliers to require advance payments or security deposits, further draining our resources, and may result in loss of some of our employees who seek employment elsewhere. If we raise additional funds through the issuance of equity, or securities convertible into equity, we may be required to do so at a price per share below then-current trading prices, thereby diluting our current shareholders. We may not be able to obtain additional funds on acceptable terms, or at all. Other sources of capital, such as a collaboration or strategic alliance, may require us to grant third parties rights to our intellectual property assets, or require us to adversely renegotiate the terms of one or more of our existing collaborations. We may also need to change our operating plans. Although we are currently discussing with third parties a collaboration for our HCV non-nucleoside drug discovery program, we may fail to enter into any agreement on acceptable terms, if at all. We also may be unable to find buyers willing to purchase our equity or to license other products or technology on commercially favorable terms, if at all. If additional funds are not available we may be required to cease operations. In order to maintain its license to use radioactive research materials, Genelabs has established a $150,000 standby letter of credit in favor of the Radiologic Health Branch of the California Department of Health Services. If we our unable to raise additional funds, the letter of credit may be terminated and the radioactive materials license may be suspended or revoked. Because we may not continue to qualify for listing on the Nasdaq quotation system, the value of your investment in Genelabs may substantially decrease. To remain listed on the Nasdaq Capital Market we must have at least $2.5 million in shareholders’ equity or a market value of at least $35 million. Our shareholders’ equity as of December 31, 2005 was $2.3 million and as of March 15, 2006 the Company’s market value was approximately $34 million. We currently do not comply with the minimum shareholder’s equity requirement, and will not be able to comply with this requirement unless we are able to increase our shareholders’ equity through a financing or other means. We may not be able to maintain compliance with the market capitalization requirement. To remain listed on the Nasdaq Capital Market the closing bid price of our stock must be at least $1.00 per share. We may not be able to maintain compliance with the minimum closing bid price requirement. If Genelabs is unable to meet or maintain compliance with all of the Nasdaq listing requirements, it will be delisted from the Nasdaq Capital Market. If delisted from the Nasdaq Capital Market, Genelabs might apply for listing on the American Stock Exchange. Genelabs may fail to meet the requirements for initial listing or may fail to maintain compliance with the continued listing requirements of the American Stock Exchange. Delisting from the Nasdaq Capital Market would adversely affect the trading price of our common stock, significantly limit the liquidity of our common stock and impair our ability to raise additional funds. We may not be profitable in the near future or at all and in order to carry out our business plans we will require additional funds which may not be available. We have incurred losses each year since our inception and have accumulated approximately $229 million in net losses through December 31, 2005, including a net loss of $10.8 million for the year ended December 31, 2005. We may never be profitable and our revenues may never be sufficient to fund operations. We presently estimate that our current cash resources are adequate to fund our current operations to approximately the beginning of the fourth quarter of 2006. We will require additional capital to carry out our business plans. The following are illustrations of potential impediments to our ability to successfully secure sufficient additional funds:   •  the current trading price of our stock will materially and adversely affect our ability to raise funds through the issuance of stock;     •  the amount of stock we may sell and capital we may raise privately without a shareholder vote is limited, and we may be unable to secure capital on a timely basis with acceptable terms if we must submit such a transaction to our shareholders for approval;     •  the listing of our stock on the Nasdaq Capital Market may materially and adversely affect our ability to raise funds through the issuance of stock because of factors such as reduced liquidity and the requirement to comply with state securities laws;     •  if we are unable to maintain compliance with the Nasdaq’s listing requirements, our ability to successfully obtain additional equity financing will be negatively impacted;   •  since our research programs are in an early stage, there are fewer opportunities to enter into collaborations with other companies and up-front payments for early-stage pharmaceutical research collaborations are generally smaller for projects that are further from potential marketability;     •  biotechnology research and development projects have a high risk of failure and the failure of our research-stage drug candidates or those of other companies could discourage funding sources from providing us with financing; and     •  discussions with the Food and Drug Administration have indicated that the Company will need to conduct at least one additional Phase III clinical trial of Prestara in order to qualify for approval, and the Company does not have the funds to conduct the trial. Additional funds for our research and development activities may not be available on acceptable terms, if at all. The unavailability of additional funds could delay or prevent the development of some or all of our products and technologies, which would have a material adverse effect on our business, financial condition and results of operations. The results of our clinical trial of Prestara tm , Genelabs’ drug candidate for systemic lupus erythematosus, were not positive, substantially decreasing the probability that Prestara will ever be approved for marketing and diminishing our business prospects. In order to satisfy conditions set by the U.S. Food and Drug Administration, or FDA, we conducted a Phase III clinical trial of Prestara on women with lupus taking glucocorticoids using BMD as the trial’s primary endpoint. Prestara is a pharmaceutical formulation containing highly purified prasterone, the synthetic equivalent of dehydroepiandrosterone or DHEA, a naturally occurring hormone. This clinical trial did not demonstrate a statistically significant difference between the bone mineral density of the group of patients taking Prestara and the group taking placebo. Additionally, the trial was not powered to demonstrate, and in fact did not demonstrate, a statistically significant benefit in secondary endpoints such as amelioration of lupus symptoms. While we believe we have identified most probable causes for the failure of this study to reach its primary endpoint, we may never know with certainty what the cause or causes of this failure were. A clinical trial of prasterone (the active ingredient in Prestara) was conducted by Genovate Biotechnology Co., Ltd., or Genovate, a Taiwan-based company that has a license from us for Prestara in most Asian countries. In April 2005 we announced that this clinical trial did not meet its primary endpoint, bone mineral density at the lumbar spine. Because both our and Genovate’s clinical trials did not meet their primary endpoints, the FDA will not approve Prestara without another Phase III clinical trial. It may not be possible to design and implement a trial that would successfully provide results sufficient to obtain FDA approval for Prestara, and Genelabs currently does not have the funds to conduct such a trial. Our research programs are in an early stage and may not successfully produce commercial products. Pharmaceutical discovery research is inherently high-risk because of the high failure rate of projects. To date, our pharmaceutical research has been focused on a limited number of targets for which no or few commercial drugs have been successfully developed. Our projects may fail if, among other reasons, the compounds being developed fail to meet criteria for potency, toxicity, pharmacokinetics, manufacturability, intellectual property protection and freedom from infringement, or other criteria; if others develop competing therapies; or if we fail to make progress due to lack of resources or access to enabling technologies. Genelabs’ product candidates, other than Prestara, are in an early stage of research. All of our research projects may fail to produce commercial products.

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