Pazopanib for the treatment of breast cancer

Introduction: Several clinical trials have shown clinical benefit of angiogenesis inhibitors in the treatment of solid tumors. Pazopanib is a multitargeted tyrosine kinase inhibitor that is currently approved for the treatment of patients with advanced renal cell carcinoma (RCC). Areas covered: In this article, the clinical development of pazopanib as it relates to breast cancer is reviewed including its evaluation in clinical trials and side effect profile. Preclinical data show the anti-tumor activity of pazopanib in animal models. Several trials of pazopanib monotherapy and combination therapy in breast cancer have been completed or are underway. Expert opinion: The development of biomarkers predictive of response and toxicity to angiogenesis inhibitors remains a challenging endeavor and is necessary to help guide treatment decision.