Study

NRG-GY036: A Phase III Trial of One vs. Two Years of Maintenance Olaparib, with or without Bevacizumab, in Patients with BRCA1/2 Mutated or Homologous Recombination Deficient (HRD+) Ovarian Cancer Following Response to First Line Platinum-Based Chemotherapy

This phase III trial compares the effect of olaparib for one year versus two years, with or without bevacizumab, for the treatment of BRCA 1/2 mutated or homologous recombination deficient stage III or IV ovarian cancer. Olaparib is a polyadenosine 5'-diphosphoribose polymerase (PARP) enzyme inhibitor and may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Bevacizumab is in a class of medications called antiangiogenic agents. It works by stopping the formation of blood vessels that bring oxygen and nutrients to tumor. This may slow the growth and spread of tumor. Giving olaparib for one year with or without bevacizumab may be effective in treating patients with BRCA 1/2 mutated or homologous recombination deficient stage III or IV ovarian cancer, when compared to two years of olaparib.

Why this Research Matters

I. To determine investigator assessed progression-free survival (PFS) using Response Evaluation Criteria in Solid Tumors (RECIST) version (v)1.1 (non-inferiority) for one versus (vs.) two years of maintenance olaparib in the modified intent to treat (ITT) population. SECONDARY OBJECTIVES: I. To evaluate PFS2 and overall survival (OS) in the modified ITT population. II. To evaluate PFS, PFS2, and OS in the as-treated population. III. To evaluate toxicity, including rates of myelodysplastic syndrome (MDS), acute myeloid leukemia (AML), and other secondary malignancies, in the safety population. EXPLORATORY OBJECTIVE: I. To evaluate the moderating effect of physician-choice bevacizumab (as stratified) on randomized treatment effect estimates. TRANSLATIONAL OBJECTIVES: I. To assess BRCA reversion mutations in circulating tumor deoxyribonucleic acid (ctDNA) as a predictor of poor response in the BRCA mutated (BRCAm) population. II. To correlate a combined assay assessing quantitative BRCA1 and RAD51C promoter methylation and pathogenic variants in core homologous recombination repair (HRR) genes with clinical homologous recombination deficiency (HRD) testing and outcomes in the BRCA wildtype (BRCAwt) population. OUTLINE: Patients are randomized to 1 of 2 arms. ARM I (REFERENCE): Patients receive olaparib orally (PO) twice daily (BID) on days 1-21 of each cycle. Cycles repeat every 21 days for up to 2 years in the absence of disease progression or unacceptable toxicity. Patients may also receive bevacizumab IV on day 1 of each cycle. Cycles of bevacizumab repeat every 21 days for up to 1 year in the absence of disease progression or unacceptable toxicity. Patients also undergo blood sample collection and computed tomography (CT) and/or magnetic resonance imaging (MRI) throughout the study. ARM II (EXPERIMENTAL): Patients receive olaparib PO BID on days 1-21 of each cycle. Cycles repeat every 21 days for up to 1 year in the absence of disease progression or unacceptable toxicity. Patients may also receive bevacizumab IV on day 1 of each cycle. Cycles of bevacizumab repeat every 21 days for up to 1 year in the absence of disease progression or unacceptable toxicity. Patients also undergo blood sample collection and CT and/or MRI throughout the study. After completion of study treatment, patients are followed up every 3 months for 2 years, then every 6 months for 3 years.

Who can Participate

Adult

Detailed eligibility criteria is available on ClinicalTrials.gov. These requirements will be discussed with your doctor and/or study representative. ClinicalTrials.gov to learn more about this study. https://clinicaltrials.gov/study/NCT06580314?term=GY036&rank=1