United States – October 27, 2026 -- Solid Biosciences has dosed 40 participants with its Duchenne gene therapy SGT-003 and reported positive interim safety and biomarker data from the ongoing Phase 1/2 INSPIRE DUCHENNE trial. The company presented the update at the 2026 MDA Clinical & Scientific Conference.

United States – October 27, 2026 -- Solid Biosciences has expanded its INSPIRE DUCHENNE gene therapy trial to 43 participants and now accepts children aged 4 to under 12, up from the previous range of 4 to under 8.

Three participants dosed with no serious adverse events

INSPIRE DUCHENNE is a first-in-human, multicenter, Phase 1/2 open-label study. It tests the safety, tolerability and efficacy of a single intravenous infusion of SGT-003, a next-generation AAV gene therapy candidate, in ambulant boys with Duchenne.

United States – October 27, 2026 -- Families affected by Duchenne muscular dystrophy have early data on SGT-003, an investigational gene therapy from Solid Biosciences: 90 days after dosing, three boys showed average microdystrophin expression of 110%.

Global – October 27, 2026 -- Fifty-three boys with Duchenne muscular dystrophy have now received the investigational gene therapy SGT-003, and a Phase 3 trial is already enrolling patients in Australia and Canada. Solid Biosciences shared the update in a letter to the Duchenne community as the annual Parent Project Muscular Dystrophy (PPMD) conference got under way.

United States – October 27, 2026 -- Fifteen people with Duchenne muscular dystrophy had received the investigational gene therapy SGT-003 in the INSPIRE DUCHENNE clinical study as of August 12, 2025, according to developer Solid Biosciences.

Ten trial sites span four countries

The multi-center, open-label trial now runs 10 active clinical sites in the United States, Canada, Italy, and the United Kingdom. More sites are expected to open later this year.

United States – October 27, 2026 -- Solid Biosciences has dosed 33 children aged 1 to 10 with its investigational gene therapy SGT-003 for Duchenne muscular dystrophy, and a Phase 3 trial has enrolled its first patient.