Solid said that the first patients to receive its Duchenne gene therapy all produced high levels of the target protein, an early sign of promise

The company raised $200 million after early findings hinted its therapy could be more potent than others like it, including Sarepta Therapeutics’ Elevidys.

Shares of Solid Biosciences (NASDAQ:SLDB) jumped ~88% in the premarket on Tuesday after the gene therapy developer reported promising early results from a Phase 1/2 trial for its lead asset SGT-003 in Duchenne muscular dystrophy,

Solid Biosciences’ gene therapy uses a shortened version of the dystrophin protein, which is engineered to mimic the key functions of full-length dystrophin and allows it be delivered more effectively to muscle cells.

Day 90 biopsy data reported from first 3 participants dosed in Phase 1/2 INSPIRE DUCHENNE trial —— Average microdystrophin expression of 110% (N=3) and significant improvements in multiple additional muscle health biomarkers observed support the potential of SGT-003 as a next-generation,

Boston, USA-based biotech Solid Biosciences saw its shares rocket 36% to $5.48 yesterday, after the precision genetic medicines for neuromuscular and cardiac diseases company announced positive initial data from the Phase I/II INSPIRE DUCHENNE trial evaluating SGT-003.