AstraZeneca and MSD’s Lynparza (olaparib) has been approved in the European Union (EU) for the 1st-line maintenance treatment with bevacizumab of patients with homologous recombination deficient (HRD)-positive advanced ovarian cancer.

Ovarian cancer is the fifth most common cause of cancer death in the EU and the five-year survival rate is approximately 45%, due partly because women are often diagnosed with advanced disease (Stage III or IV).

The approval by the European Commission was based on a biomarker subgroup analysis of the PAOLA-1 Phase III trial which showed Lynparza, in combination with bevacizumab maintenance treatment, demonstrated a substantial progression-free survival (PFS) improvement versus bevacizumab alone for patients with HRD-positive advanced ovarian cancer.

Isabelle Ray-Coquard, principal investigator of the PAOLA-1 Phase III trial and medical oncologist, Centre Léon Bérard and President of the GINECO group, Paris, France, said: “For women with advanced ovarian cancer, the goal of 1st-line treatment is to delay disease progression for as long as possible with the intent of achieving long-term remission. Unfortunately, once a patient’s cancer recurs, it historically has been incurable. Lynparza together with bevacizumab has demonstrated an impressive median progression-free survival benefit of more than three years and is poised to become the standard of care for eligible patients with HRD-positive tumours in the EU.”

Dave Fredrickson, Executive Vice President, Oncology Business Unit, said: “Half of all newly diagnosed patients with advanced ovarian cancer have HRD-positive tumours. Women treated with Lynparza in combination with bevacizumab in the PAOLA-1 Phase III trial lived progression free for a median of more than three years, showing that HRD testing should be an essential component of clinical diagnosis. HRD status can help physicians select a personalised 1st-line treatment regimen for patients to substantially delay relapse in this devastating disease.”

Roy Baynes, Senior Vice President and Head of Global Clinical Development, Chief Medical Officer, MSD Research Laboratories, said: “Biomarker testing has rapidly enhanced our understanding of how PARP inhibition can help target this disease. The EU approval reinforces that HRD-positive tumours represent a distinct subset of advanced ovarian cancer and HRD testing is critical for women in this setting.”

The PAOLA-1 Phase III trial showed that Lynparza, in combination with bevacizumab maintenance treatment, reduced the risk of disease progression or death by 67% (based on a hazard ratio of 0.33; 95% confidence interval 0.25-0.45). The addition of Lynparza improved PFS to a median of 37.2 months versus 17.7 with bevacizumab alone in patients with HRD-positive advanced ovarian cancer. 

Further results recently presented at the European Society for Medical Oncology Virtual Congress 2020 showed a statistically significant improvement in the key secondary endpoint of the time to second disease progression (PFS2). Lynparza with bevacizumab provided benefit beyond first disease progression, improving PFS2 to a median of 50.3 months versus 35.3 with bevacizumab alone.

The full EU indication is for Lynparza in combination with bevacizumab for the maintenance treatment of adult patients with advanced (FIGO Stages III and IV) high-grade epithelial ovarian, fallopian tube or primary peritoneal cancer who are in response (complete or partial) following completion of 1st-line platinum-based chemotherapy in combination with bevacizumab and whose cancer is associated with HRD positive status defined by either a breast cancer susceptibility gene 1/2 (BRCA1/2) mutation and/or genomic instability. 

Lynparza in combination with bevacizumab is approved in the US and in several other countries as a 1st-line maintenance treatment for patients with HRD-positive advanced ovarian cancer and is currently under regulatory review in other countries around the world.