Blueprint Medicines Announces Initial Data from Phase 2 PIONEER Trial of Avapritinib in Patients with Indolent Systemic Mastocytosis Showing Activity at All Dose Levels Tested
(WorldNews Health)

CAMBRIDGE, Mass., Dec. 8, 2019 /PRNewswire/ -- Blueprint Medicines Corporation (NASDAQ:BPMC), a precision therapy company focused on genomically defined cancers, rare diseases and cancer immunotherapy, today announced initial data from the Phase 2 PIONEER clinical trial of avapritinib in patients with indolent systemic mastocytosis (SM). Initial data from the dose-finding Part 1 of the PIONEER trial showed rapid and robust reductions in serum tryptase, a well-established measure of mast cell burden, in patients treated with 25 mg, 50 mg or 100 mg of avapritinib once daily (QD). All dose levels of avapritinib tested were well-tolerated, and no patients discontinued treatment due to an adverse...