Positive results from the PROpel Phase III trial showed AstraZeneca and MSD’s Lynparza (olaparib) in combination with abiraterone demonstrated a statistically significant and clinically meaningful improvement in radiographic progression-free survival (rPFS) versus current standard-of-care abiraterone as a 1st-line treatment for patients with metastatic castration-resistant prostate cancer (mCRPC) with or without homologous recombination repair (HRR) gene mutations.

These results will be presented on 17 February at the 2022 American Society of Clinical Oncology (ASCO) Genitourinary Cancers Symposium.

Fred Saad, Professor and Chairman of Urology and Director of Genitourinary Oncology at the University of Montreal Hospital Center and principal investigator in the trial, said: “It is clear to me that the prognosis for metastatic castration-resistant prostate cancer (mCRPC) is extremely poor, and many patients are only able to receive one line of effective therapy. The results of the PROpel trial, which showed that olaparib in combination with abiraterone significantly delayed disease progression versus abiraterone by more than eight months, demonstrate the potential for this combination to become a new standard of care option in mCRPC if approved.”

Susan Galbraith, Executive Vice President, Oncology R&D, AstraZeneca, said: “This Lynparza combination has the potential to afford first-line patients more time without disease progression while also maintaining their quality of life. The PROpel results are impressive because active comparator trials set a high bar and, in this trial, Lynparza plus abiraterone showed a significant clinical improvement when compared to an active standard of care in patients with metastatic castration-resistant prostate cancer, regardless of whether they have an HRR gene mutation.”

Roy Baynes, Senior Vice President and Head of Global Clinical Development, Chief Medical Officer, MSD Research Laboratories, said: “Results from the PROpel trial showed that Lynparza in combination with abiraterone plus prednisone reduced the risk of disease progression or death by a third compared to abiraterone plus prednisone in the first-line setting for patients with metastatic castration-resistant prostate cancer, regardless of their biomarker status. We look forward to discussing these important results with global health authorities as quickly as possible. We thank the patients, caregivers and health care providers for participating in this study.”