AstraZeneca and MSD’s Lynparza added to bevacizumab reduced the risk of disease progression or death by 41% in the overall trial population
AstraZeneca and MSD Inc., Kenilworth, N.J., US (MSD: known as Merck & Co., Inc. inside the US and Canada) today announced detailed positive results from the Phase III PAOLA-1 trial, showing Lynparza (olaparib) demonstrated a statistically significant and clinically meaningful improvement in progression-free survival (PFS) in women with newly-diagnosed advanced ovarian cancer.
The trial compared Lynparza when added to standard-of-care (SoC) bevacizumab vs. bevacizumab alone in women in the 1st-line maintenance setting, irrespective of their genetic biomarker status or outcome from previous surgery. Investigator-assessed results showed Lynparza added to bevacizumab reduced the risk of disease progression or death by 41% (equal to a hazard ratio of 0.59) and improved PFS to a median of 22.1 months vs. 16.6 months for those treated with bevacizumab alone. At two years since trial initiation, 46% of women treated with Lynparza added to bevacizumab showed no disease progression vs. 28% of women receiving bevacizumab alone.
The sensitivity analysis of blinded independent central review (BICR) of PFS was consistent, showing a similar improvement with a median of 26.1 months for Lynparza added to bevacizumab vs. 18.3 months for bevacizumab alone. The safety and tolerability profile of Lynparza and bevacizumab were consistent with those known from previous trials for each medicine, and with no detriment to quality of life.
The results were presented during the Presidential Symposium of the 2019 European Society of Medical Oncology (ESMO) congress in Barcelona, Spain (Abstract #LBA2_PR).
The trial also included exploratory sub-group analyses including BRCA-mutated (BRCAm) and broader homologous recombination deficiency (HRD) populations, which showed treatment with Lynparza added to bevacizumab demonstrated greater benefit vs. bevacizumab alone. In the BRCAm-positive sub-group, Lynparza added to bevacizumab reduced the risk of disease progression or death by 69% (equal to a hazard ratio of 0.31). In the broader HRD-positive sub-group, which represents approximately half of women with newly-diagnosed advanced ovarian cancer and includes BRCAm, Lynparza added to bevacizumab reduced the risk of disease progression or death by 67% (equal to a hazard ratio of 0.33).
José Baselga, Executive Vice President, Oncology R&D, said: “This trial was designed to reflect everyday clinical practice using a global standard-of-care treatment with Lynparza. The results showed at two years nearly half of women with advanced ovarian cancer were progression-free with Lynparza added to bevacizumab as a 1st-line maintenance treatment, regardless of their biomarker status or surgical outcome. We are working with regulatory authorities to bring Lynparza to these patients as quickly as possible.”
Roy Baynes, Senior Vice President and Head of Global Clinical Development, Chief Medical Officer, MSD Research Laboratories, said: “PAOLA-1 is the second positive Phase III trial involving Lynparza in the 1st-line maintenance setting for advanced ovarian cancer. Following the positive SOLO-1 trial, we are encouraged by the PAOLA-1 results which reaffirm AstraZeneca and MSD’s ongoing commitment to explore potential treatment options for more women with ovarian cancer.”
Isabelle Ray-Coquard, principal investigator of the PAOLA-1 trial and medical oncologist, Centre Léon Bérard and President of the GINECO group, said: “The goal of 1st-line, including maintenance, treatment for women with newly-diagnosed advanced ovarian cancer is to delay relapse. Unfortunately, the risk of relapsing is high, as two out of three women relapse within three years of initial diagnosis. In PAOLA-1, the results of Lynparza added to bevacizumab were significant and have the potential to change clinical practice in how women with advanced ovarian cancer are treated in the 1st-line maintenance setting.”