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US FDA proposes using existing science to speed up gene therapy development

By Thomson Reuters Jun 2, 2026 | 9:28 AM

June 2 (Reuters) – The U.S. Food and Drug Administration on Tuesday proposed allowing makers of cell and gene therapies ​targeting rare and life-threatening diseases to ‌use existing scientific knowledge to expedite development.

Here are a few details:

• The agency in its draft guidance said the recommendations outline how developers can leverage ‌chemistry, ​manufacturing and controls data, and ⁠nonclinical and clinical ⁠prior knowledge from other relevant products.

• The information that could be used includes medical or scientific information that is generally accepted ​by experts as well as knowledge gained from developing and manufacturing similar products ⁠and processes, the FDA ⁠said.

• This prior knowledge could help ​streamline submissions and subsequent review, and to expedite ​product development.

• The FDA had proposed ‌a new framework earlier this year to accelerate approvals of personalized treatments for rare genetic diseases, allowing drugmakers to rely on small, ⁠well-controlled studies when traditional trials are not possible.

• The agency had faced intense scrutiny under former ⁠Commissioner Marty ‌Makary, who stepped down last ⁠month after a string of controversial ​rare-disease ‌treatment decisions and public clashes ​with drugmakers.

• ⁠A permanent replacement has not yet been announced, and Deputy Commissioner for Food Kyle Diamantas is leading the agency in an acting capacity.

(Reporting by Mariam Sunny in Bengaluru; Editing by ​Sahal Muhammed)