Randomized phase II trial of the cyclin-dependent kinase inhibitor dinaciclib (MK-7965) versus capecitabine in patients with advanced breast cancer.

This study assessed the efficacy and safety of dinaciclib, a cyclin-dependent kinase inhibitor, compared with capecitabine in patients with previously treated advanced breast cancer. Thirty women were randomized in this multicenter, open-label, phase II trial. Dinaciclib demonstrated similar but not superior antitumor activity to capecitabine. Future studies may consider dinaciclib for select patients and in combination with other agents.