SAN ANTONIO – For premenopausal women with advanced hormone receptor–positive, HER2-negative breast cancer, the addition of the cyclin-dependent kinase (CDK) 4/6 inhibitor ribociclib (Kisqali) to endocrine therapy and goserelin was associated with a near doubling in progression-free survival (PFS), improvement in pain scores and a longer time to deterioration of quality of life scores.
Previous clinical trials have shown the advantage of adding a CDK4/6 inhibitor to standard aromatase inhibitor therapy in postmenopausal women, but the randomized phase 3 MONALEESA-7 trial is the first phase 3 study of an agent in this class in premenopausal women with breast cancer, and is the first randomized trial in this population in nearly 2 decades, notes Debu Tripathy, MD, from the University of Texas MD Anderson Cancer Center in Houston.
The median PFS for women treated with ribociclib plus endocrine therapy with either an aromatase inhibitor or tamoxifen plus the lutenizing hormone-releasing hormone agonist goserelin was 23.8 months, compared with 13 months for women treated with the same combination except for a ribociclib placebo.
In this video interview at the San Antonio Breast Cancer Symposium, Dr. Tripathy discusses the therapeutic benefits and quality of life improvements associated with adding ribociclib to endocrine therapy and ovarian suppression in this population.
The MONALEESA 7 trial was supported by Novartis. Dr. Tripathy disclosed steering committee consulting fees and institutional funding from the company.