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Bezuclastinib

Gastrointestinal stromal tumor

Manufacturer
Cogent Biosciences
Regulatory submission
NDA submitted April 2026
Last updated
76 sources

Clinical evidence

PLX121-01

18 evidence topics · 3 sources

Objective
Location and study date
Study design
Summary

The monotherapy and sunitinib-combination cohorts used nonrandomized 3+3 dose escalation.

Eligibility criteria
Age and performance-status thresholds
CriterionValue
Minimum age, years“18”
ECOG performance status“0 to 2”
Treatment
Summary

The early-trial recommended phase 2 dose was PLX9486 1000 mg daily, combined with sunitinib 25 or 37.5 mg daily in continuous 28-day cycles.

Recommended phase 2 dose
DrugDaily dose, mg
PLX9486“1000”
Study outcomes
Rationale for using maximum tolerated dose as the primary endpoint

Not applicable.

Statistical analysis description
Number of participants (Planned and analyzed)
Unique enrolled population
PopulationParticipants
PLX9486-naive participants“39”
Participants with GIST“35”
Description of analysis sets
Summary

Sample sizes reflected clinical considerations. Response intervals used exact binomial methods, and survival analyses used Kaplan-Meier methods.

Results
Participant disposition
Summary

Three monotherapy participants were reenrolled in the extension, producing a safety population of 18 without increasing unique enrollment.

Combination-extension safety population
PopulationParticipants
Including reenrolled participants“18”
Baseline characteristics
Baseline age and sex
CharacteristicValue
Median age, years“57”
Male participants, percent“56.4%”
Efficacy results
Health-related quality of life and patient-reported outcomes

No evidence found.

Safety results
Study limitations
Summary

The combination efficacy cohort included 15 PLX9486-naive participants. Nonrandomized treatment assignment, small sample size, and disease heterogeneity limit comparative interpretation.