Bryan Concerns About Gene Therapy Accelerated OKs
CBER Office of Tissues and Advanced Therapies director Wilson Bryan, who has announced his retirement from the agency, is concerned about accelerated approvals for cell and gene therapies considering how long it can take to complete confirmatory trials, according to a Bloomberg Law report. Speaking 2/13 at the Biopharma Congress, Bryan said, “If it takes years as suggested to tell if something works, then that means it takes years to tell if it doesn’t work…. I really worry that will damage the field by approving something under accelerated approval that at the end of the day doesn’t work.”
Responding to Bryan’s concern, Yale School of Medicine family physician Reshma Ramachandran told Bloomberg Law that the comments “highlight the challenge that FDA faces in their role balancing timely access to new products, especially where there are no options available for patients, while also providing assurance to patients and clinicians that the product is safe and effective.”
National Organization for Rare Disorders director of policy and regulatory affairs Karin Hoelzer told Bloomberg that accelerated approval has benefited rare disease patients. “We do not want the standards to be so stringent that our patients cannot access gene therapies that have been shown to be effective based on the accelerated approval standard — surrogate or intermediate endpoints that are reasonably likely to predict clinical benefit,” she said.
“As accelerated approval provides a pathway for withdrawing the treatment should it fail confirmatory studies or be unnecessarily delayed in doing so,” Ramachandran said, “it’s critical that FDA has continued oversight as the study goes on, not just many years later when the submission deadline occurs. If there is a safety concern that emerges along the way, FDA should have the ability to stop market authorization of the drug and investigate in a timely manner to prevent further patient harm. Additionally, if there does not seem to be any signal of impending clinical benefit as the study continues, then the study should be stopped earlier and early withdrawal be considered.”