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Silencing Investor Concerns? Alnylam Achieves RNAi Milestone

Published: Wednesday, August 01, 2012
Last Updated: Wednesday, August 01, 2012
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Alnylam Pharmaceutical received milestone payment from GSK as part of their ongoing collaboration to utilize Alnylam’s RNA interference (RNAi) technology to develop GSK’s cell-culture based influenza vaccine.

While almost all other viral vaccines (e.g., mumps, measles, and polio) are currently produced via cell-culture, influenza vaccines have been resistant to cell-culture based manufacturing due to insufficient virus yield and quality. GSK hopes to utilize Alnylam’s VaxiRNA platform to overcome these challenges. The proprietary VaxiRNA technology utilizes RNAi to silence genes that limit or prevent the production of vaccine antigens.

As part of the collaboration, which was initiated in the fourth quarter of 2011, Alnylam receives R&D funding and milestone payments from GSK as well as royalties from any commercialized vaccine. GSK hopes to capitalize on Alnylam’s expertise to generate a commercially viable cell-culture based influenza vaccine that could be first to market in the United States.

The development of an innovative method to produce influenza vaccines has become a major initiative. Since the 1940s, influenza vaccines have been generated using chicken eggs. This process takes months and is difficult to scale-up. The recent H1N1 influenza pandemic highlighted these inadequacies and resulted in a renewed push for novel influenza vaccine manufacturing methodologies. A novel production process could also generate a vaccine that could be administered to individuals with egg allergies and decrease overall manufacturing costs. GSK expects to utilize its cell-culture method to enter this emerging market, but the company faces tough competition. For example, Novartis, in collaboration with the United States Department of Health and Human Services, is building a $1 billion facility in North Carolina that will house R&D and production facilities for a cell-culture based influenza vaccine program.

The milestone payment comes during a challenging time for Alnylam. Its ambitious “5x15” program hopes to develop RNAi therapies for five diseases with a high unmet need (e.g., hemophilia, hypercholesterolemia, refractory anemia) by 2015. Earlier this month, the company announced positive Phase I results concerning its therapy for transthyretin (TTR) amyloidosis, a progressive neurodegenerative disease caused by protein deposits, as well as promising pre-clinical results for its hemophilia treatment. These findings raised Alnylam’s stock price over 150% to $18.76 per share, but a pending lawsuit could cause shareholders to worry. Tekmira Pharmaceuticals Corporation, a Vancouver-based biotechnology company, alleges that Alnylam exploited their collaboration for commercial gain. The patent litigation, which heads to trial in October, threatens to hinder Alnylam’s ability to commercialize its 5x15 initiative. Alnylam is especially susceptible to any delay in 5x15-associated revenue since it has no marketed therapies. While Alnylam possibly struggles to transition from commercial platforms to therapies, a successful influenza vaccine methodology could alleviate investor concerns in the short-term.

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