Ultragenyx Resubmits Biologics License Application for UX111 AAV Gene Therapy to Treat Sanfilippo Syndrome Type A (MPS IIIA) to U.S. FDA

Company expects up to six-month review period per FDA guidelines New longer-term clinical data demonstrating durable positive brain biochemical and clinical effect for as long as 8.5 years to be presented at WORLDSymposium™ 2026 "Today, with no approved treatment options to address the relentless progression of Sanfilippo syndrome type A, families must watch helplessly as their children lose the ability to communicate, play, move, and even eat before ultimately succumbing to this devastating and fatal disea ...