Detailed results from the CAPItello-291 Phase III trial showed AstraZeneca's capivasertib in combination with Faslodex (fulvestrant) demonstrated a statistically significant and clinically meaningful improvement in progression-free survival (PFS) versus placebo plus Faslodex in patients with hormone receptor (HR)-positive, HER2-low or negative, locally advanced or metastatic breast cancer, following recurrence or progression on, or after, endocrine therapy (with or without a CDK4/6 inhibitor).1 Results will be presented today in an oral presentation at the 2022 San Antonio Breast Cancer Symposium (SABCS).
Results showed capivasertib in combination with Faslodex demonstrated a 40% reduction in the risk of disease progression or death versus placebo plus Faslodex in the overall trial population (based on a hazard ratio [HR] of 0.60, 95% confidence interval [CI] 0.51-0.71; p=1 In the AKT pathway biomarker-altered population, capivasertib plus Faslodex reduced the risk of disease progression or death by 50% versus placebo plus Faslodex (HR of 0.50, 95% CI 0.38-0.65; p=1 Alterations within the AKT pathway (PI3K/AKT/PTEN) occur frequently in breast cancer, affecting up to 50% of patients with advanced HR-positive breast cancer.2-4
Nicholas Turner, MD, PhD, Professor of Molecular Oncology at The Institute of Cancer Research, London, and The Royal Marsden NHS Foundation Trust, London, UK, and principal investigator in the CAPItello-291 Phase III trial, said: "These data demonstrate the practice-changing potential of capivasertib as a new treatment option for patients with advanced HR-positive breast cancer. Critically, this potentially first-in-class treatment has shown it delays disease progression for those who have progressed on, or become resistant to, endocrine therapies and CDK4/6 inhibitors."
Susan Galbraith, Executive Vice President, Oncology R&D, AstraZeneca, said: "Capivasertib brings important progress to an area with persistent treatment gaps as the first therapy of its kind shown to be effective in a Phase III trial in patients with advanced HR-positive, HER2-low or negative breast cancer. We believe these results which showed benefit in all-comers and biomarker positive populations can reshape HR-positive breast cancer treatment, and that capivasertib can become an important new option for patients."
Summary of results: CAPItello-2911
