Scholar Rock recently announced Q2 results, highlighting continued progress in its Phase 3 SAPPHIRE trial for the selective myostatin-inhibitor apitegromab in spinal muscular atrophy (SMA). SAPPHIRE is a randomized, double-blind, placebo-controlled study. The Cambridge, Massachusetts–based company also shared new data from its Phase 2 TOPAZ trial focused on apitegromab that showed significant and sustained improvement…