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Abstract
Taxanes have become fundamental in the treatment of early and advanced breast cancer. However, tumors vary in their sensitivity to these agents; resistance can be acquired or de novo resistance can occur. Epothilones and associated analogs are novel microtubule-stabilizing agents that induce apoptosis and promote cell death. There is now a growing body of clinical data describing the efficacy of epothilones in breast cancer patients who have progressed on taxanes and anthracyclines. This culminated with US FDA approval in October 2007 of ixabepilone (Ixempra™, Brystol Myers Squibb, NJ, USA) either as single agent or in combination with capecitabine for the treatment of breast cancer, which has progressed after prior therapies. The results of ongoing and future randomized clinical trials will further define how epothilones, in particular ixabepilone, will be integrated into the management of early and metastatic breast cancer. In parallel, the search for biomarkers predictive of sensitivity to epothilones continues in an attempt to tailor these therapies to patients with greater accuracy.
Financial & competing interests disclosure
Monica Fornier has received honoraria for speakers’ bureau from Bristol-Myers Squibb. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.