FDA OKs Sarepta Study of New Immune Suppression Approach with Elevidys; Gilead Acquires Preclinical TREX1 Program on November 26, 2025 acute liver injury Elevidys gene therapy Gilead Muscular Dystrophy, Duchenne sirolimus Therapeutic immunosuppression TREX1 gene United States Food and Drug Administration +
Sarepta Shifts Focus to siRNA Platform, Lays Off 500 After Elevidys Receives Black Box Warning on July 17, 2025 acute liver injury black box Cautionary Warning Elevidys gene therapy layoffs Muscular Dystrophy, Duchenne pipeline shift restructuring RNA, Small Interfering +