Pfizer Inc. said on April 28 the company would open the first U.S. trial sites for its experimental gene therapy for a muscle-wasting disorder, after the Food and Drug Administration lifted the regulatory agency’s hold on a late-stage study.

Solid Biosciences Inc. announced organizational structure changes to create a leaner company focused on advancing SGT-001, a gene transfer candidate for the treatment of Duchenne muscular dystrophy.