AstraZeneca Plc - Lynparza Phase III PROfound trial in HRR
AstraZeneca and MSD's Lynparza met the primary endpoint of significantly increasing the time patients selected for BRCA1/2 or ATM mutations live without radiographic disease progression vs. standard of care treatment
Only PARP inhibitor with positive Phase III results in four different cancer types (ovarian, breast, pancreatic and prostate)
AstraZeneca and MSD Inc., Kenilworth, N.J., US (MSD: known as Merck & Co., Inc. inside the US and Canada) today announced positive results from the Phase III PROfound trial of Lynparza (olaparib) in men with metastatic castration-resistant prostate cancer (mCRPC) who have a *homologous recombination repair gene mutation (HRRm) and have progressed on prior treatment with new hormonal anticancer treatments (e.g. enzalutamide and abiraterone).
Results from the trial showed a statistically-significant and clinically-meaningful improvement in the primary endpoint of radiographic progression-free survival (rPFS) with Lynparza vs. enzalutamide or abiraterone in men with mCRPC selected for BRCA1/2 or ATM gene mutations, a subpopulation of HRR gene mutations. The safety and tolerability profile of Lynparza was generally consistent with previous trials.
Jose? Baselga, Executive Vice President, Oncology R&D, said: "For men with metastatic castration-resistant prostate cancer the disease remains deadly, especially in those who have failed on a new hormonal anticancer treatment. This trial is the only positive Phase III trial of any PARP inhibitor in metastatic castration-resistant prostate cancer, where the need for new, effective therapies is high. The PROfound trial also demonstrates the potential value of genomic testing in this at-risk patient population. We look forward to discussing these results with global health authorities soon."
Roy Baynes, Senior Vice President and Head of Global Clinical Development, Chief Medical Officer, MSD Research Laboratories, said: "Metastatic castration-resistant prostate cancer is a deadly disease and represents an area of critical unmet medical need. The Phase III PROfound trial is another example of MSD and AstraZeneca's shared commitment to improving long-term outcomes for people living with cancer. These results represent the potential for a new, oral targeted treatment option for this patient population."
AstraZeneca and MSD plan to present the full data from the trial at a forthcoming medical meeting. The companies are also exploring additional trials in prostate cancer, including the ongoing Phase III PROpel trial, testing Lynparza as a 1st-line therapy in mCRPC, in combination with abiraterone.
PROfound is a prospective, multicentre, randomised, open-label, Phase III trial testing the efficacy and safety of Lynparza versus enzalutamide or abiraterone in patients with mCRPC who have progressed on prior treatment with new hormonal anticancer treatments and have a qualifying tumour mutation in one of 15 genes involved in the HRR pathway, including among them BRCA1/2, ATM and CDK12.
About metastatic castration-resistant prostate cancer
Prostate cancer is the second-most common cancer in men, with an estimated 1.3 million new cases diagnosed worldwide in 2018 and is associated with a significant mortality rate.1Development of prostate cancer is often driven by male sex hormones called androgens, including testosterone.2 mCRPC occurs when prostate cancer grows and spreads to other parts of the body despite the use of androgen-deprivation therapy to block the action of male sex hormones.2 Approximately 10-20% of men with advanced prostate cancer will develop CRPC within five years, and at least 84% of these will have metastases at the time of CRPC diagnosis.3 Of men with no metastases at CRPC diagnosis, 33% are likely to develop metastases within two years.3 Despite an increase in the number of available therapies for men with mCRPC, five-year survival remains low.3