Regenxbio Shares Slide After FDA Imposes Clinical Holds on Two AAV9 Gene Therapy Programs
The U.S. Food and Drug Administration has placed clinical holds on Regenxbio's investigational gene therapies RGX-111 and RGX-121, citing a neoplasm found in a pediatric patient treated with RGX-111 four years earlier. The announcement prompted a steep drop in the company's stock, raised questions around the timing of a priority review voucher and …