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Clinical Trial Summary

This is a randomized, double-blind, placebo-controlled, Phase 2/3 study comparing the efficacy and safety of BLU-263 + best supportive care (BSC) with placebo + BSC in patients with indolent systemic mastocytosis (ISM) whose symptoms are not adequately controlled by BSC. Parts 1 and 2 will enroll patients with ISM. Patients enrolled in Part 1 or Part 2 will roll over onto Part 3 to receive treatment with BLU-263 in an open-label fashion following completion of the earlier Part. Part M will enroll patients with monoclonal mast cell activation syndrome (mMCAS). The study also includes PK groups that will enroll patients with ISM.


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT04910685
Study type Interventional
Source Blueprint Medicines Corporation
Contact Blueprint Medicines
Phone 617-714-6707
Email medinfo@blueprintmedicines.com
Status Recruiting
Phase Phase 2/Phase 3
Start date November 30, 2021
Completion date June 30, 2028

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