FDA Approves First PARP Inhibitor for Early BRCA+ Breast Cancer

Sharon Worcester

March 14, 2022

The PARP inhibitor olaparib (Lynparza) is now approved by the US Food and Drug Administration (FDA) for use in early-stage breast cancer as well as later-stage disease. Specifically, the new approval is for the adjuvant treatment of adult patients with high-risk, early-stage, HER2-negative, germline BRCA-mutated breast cancer who have completed chemotherapy and local treatment.

The FDA also approved BRACAnalysis CDx (Myriad Genetics, Inc), a companion diagnostic test to identify patients who may benefit from olaparib.

The latest approval was based on phase 3 OlympiA trial results, which showed a 42% improvement in invasive and distant disease-free survival with olaparib in comparison with placebo. Data from OlympiA and other clinical studies also confirm BRACAnalysis CDx as a "an effective test for patients deciding on their best treatment options," Myriad Genetics, Inc, noted in a press release.

The OlympiA results, as reported by Medscape Medical News, were presented during the plenary session of the American Society of Clinical Oncology (ASCO) 2021 annual meeting and were published in The New England Journal of Medicine.

Those findings prompted an ASCO "rapid recommendation" updating of ASCO's 2020 guidelines for the management of hereditary breast cancer.

The latest results from OlympiA show that olaparib reduced the risk of death by 32% (HR = 0.68) in comparison with placebo, according to a company press release announcing the approval. Overall survival data are slated for presentation at a European Society for Medical Oncology Virtual Plenary session on March 16, 2022.

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