There is one clinical trial.
This study is an open-label, multicenter, phase I/II study to evaluate the safety, PK and
clinical efficacy of avapritinib in Chinese subjects with unresectable or metastatic GIST.
The study consists of two parts: dose escalation (phase I) and dose expansion (phase II).
iii) Group 3: Chinese subjects with unresectable GIST that doesn't harbor D824V
mutation in PDGFRα gene and that has progressed despite treatment with imatinib and at
least another tyrosine kinase inhibitor. --- D824V ---
Primary Outcomes
Measure: Phase I: Recommended Phase II dose (RP2D), incidence of dose limiting toxicities (DLT) in Cycle 1, incidence and severity of adverse events and serious adverse events and changes in vital signs, clinical laboratory results and ECG findings Time: at the end of Cycle 1 (each cycle is 28 days) for RP2D and DLT; during every cycle through 30 days after the last dose of study drug, an average of approximately 24 months, for other measures
Measure: Phase II: ORR based on mRESIST 1.1 Time: At Cycle 3 (each cycle is 28 days) Day 1, then every 2 cycles until Cycle 13, they every 3 cycles through study completion, disease progression or patient discontinuation from the study (whichever comes first), an average of approximately 24 months