Sarepta Secures FDA Nod For Elevidys Study To Reduce Liver Injury Risk

Core Insights - The U.S. FDA has approved dosing in Sarepta Therapeutics Inc.'s Cohort 8 of the ENDEAVOR study, which focuses on treating non-ambulant individuals with Duchenne muscular dystrophy using Elevidys [1][2] - Cohort 8 aims to evaluate an enhanced immunosuppressive regimen with sirolimus to reduce acute liver injury associated with Elevidys treatment [2][4] - The study has reported fatalities linked to acute liver failure in patients receiving Elevidys, raising concerns among investors [3] Study Details - Cohort 8 will enroll approximately 25 non-ambulant participants in the U.S. and will include a 14-day sirolimus dosing period before Elevidys administration, followed by 12 weeks of continued dosing [3][4] - Primary endpoints of the study include the incidence of acute liver injury and Elevidys-dystrophin expression at 12 weeks [4] - The ENDEAVOR study has enrolled a total of 55 participants across seven cohorts, assessing various age groups and ambulatory statuses [5] Additional Developments - Sarepta is also progressing in the Phase 1/2 clinical study of SRP-1003 for type 1 myotonic dystrophy, with ongoing dosing in cohort 4 and plans for cohort 5 in early 2026 [6][7] - The completion of earlier cohorts has triggered a $200 million payment to Arrowhead Pharmaceuticals [6]