Alliance for Clinical Trials in Oncology
This phase III trial compares the effect of vorasidenib to placebo in combination with usual treatment, temozolomide, in treating patients with newly diagnosed grade 3 astrocytoma after radiation. Temozolomide is in a class of medications called alkylating agents. It works by damaging the cell's deoxyribonucleic acid and may kill tumor cells and slow down or stop tumor growth. Vorasidenib citrate blocks the proteins made by the mutated IDH1 and IDH2 genes, which may help keep tumor cells from growing. It is a type of enzyme inhibitor and a type of targeted therapy. Adding vorasidenib to the usual treatment, temozolomide, may be more effective than temozolomide alone in treating patients with newly diagnosed grade 3 astrocytoma after radiation therapy.
The primary and secondary objectives of the study: PRIMARY OBJECTIVE: I. To determine if vorasidenib citrate (vorasidenib) and adjuvant temozolomide following radiation therapy improves progression-free survival (PFS) per blinded independent review in patients with newly-diagnosed IDH-mutant astrocytoma (World Health Organization \[WHO\] grade 3) compared to placebo given with adjuvant temozolomide following radiation therapy. SECONDARY OBJECTIVES: I. To evaluate the safety and tolerability of vorasidenib versus (vs.) placebo in combination with temozolomide, following radiation therapy.…
Inclusion Criteria: * STEP 0: Histologic diagnosis of astrocytoma, IDH-mutant (central nervous system \[CNS\] WHO grade 3) * STEP 0: Available diagnostic slides (hematoxylin and eosin staining method \[H\&E\] and immunohistochemical stains for central review) * STEP 0: Tissue available for central biomarker testing (CDKN2A/B and1p/19q co-deletion \[all patients\], and IDH1/IDH2 \[if needed\]) * STEP 1: Centrally-confirmed diagnosis of astrocytoma, IDH-mutant (CNS WHO grade 3) * STEP 1: Presence of IDH1 p.R132 or IDH2 p.172 mutation, confirmed by central review of immunohistochemical stain or…
Undergo IMRT/VMAT
Undergo IMRT/VMAT
Undergo PBS
Undergo IMPT
Given PO
Given PO
Given PO
Undergo blood sample collection
Undergo MRI
Ancillary Studies