SIGMA (Safusidenib in IDH1 Mutant Glioma Maintenance)

This is a 3-part study. The purpose of Part 1 of the study is to evaluate the efficacy, safety, and pharmacokinetic (PK) characteristics of safusidenib in participants with recurrent/progressive IDH1-mutant World Health Organization (WHO) Grade 2 or Grade 3 glioma. The purpose of Part 2 will be to evaluate the efficacy of maintenance safusidenib treatment versus placebo in IDH1-mutant Grade 2 or Grade 3 astrocytoma with high-risk features or IDH1-mutant Grade 4 astrocytoma, following standard-of-care radiation or chemoradiation and adjuvant temozolomide. Part 2 will be randomized, double-blind, and placebo-controlled. The purpose of Part 3 will be to evaluate the efficacy of safusidenib in participants with residual or recurrent IDH1-mutant Grade 3 oligodendroglioma who have received surgery as their only treatment. Part 3 will be an open-label single-arm cohort and will enroll participants concurrently with Part 2.

NCT Number	NCT05303519
Lead Sponsor	Nuvation Bio Inc. Collaborators: AnHeart Therapeutics Inc.
Conditions	Glioma, Astrocytoma, Grade IV, IDH1-mutant Glioma, Astrocytoma, IDH-Mutant, Grade 3, Astrocytoma, IDH-Mutant, Grade 4, Astrocytoma, IDH-Mutant, Grade 2, Oligodendroglioma, Oligodendroglioma, IDH-Mutant and 1p/19q-Codeleted
Enrollment	365 participants
Start Date	2023-06-05
Primary Completion	2028-12-01 (estimated)
Study Completion	2030-12-01 (estimated)
Updated on ClinicalTrials.gov	2026-07-01