Gene Therapy Safety Issues Reflect Pushing Of The Scientific Envelope – FDA’s Marks
Recent adverse events are ‘speed bumps’ that need to be worked around, biologics center head Peter Marks says; Morgan Stanley’s Peter Hwang asserts high-profile safety issues have added to unpredictability of gene therapy development, dampening investor enthusiasm for the field.
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Lack of reference standards inhibits ability to make comparisons between products or set caps for total vector genome dose or total capsid dose, advisory committee says; panelists suggest other approaches to prevent and mitigate toxicities, including running longer-term animal studies and investigating the efficacy of immunosuppression prophylaxis and treatment strategies.
Advisory committee will discuss five types of toxicity risks with adeno-associated virus vector-based gene therapy products at a two-day meeting in September, which follows some recent high-profile instances of adverse events that have delayed development programs.
Slated to begin a Phase III later this year of ADVM-022 in wet AMD, Adverum had to scuttle a Phase II study of the gene therapy in DME after a patient suffered ocular hypotension, panuveitis and vision loss in the treated eye.