Fulcrum Therapeutics Inc.’s phase IIb data with losmapimod in facioscapulohumeral muscular dystrophy (FSHD) brought renewed hope for patients in what historically has proved a challenging therapeutic space. Though the firm’s oral p38 mitogen-activated protein kinase inhibitor missed its primary biomarker endpoint – changes in DUX4-driven gene expression – other indicators of benefit in the study called ReDUX4 painted a bright picture.