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Pazopanib for the treatment of renal cell carcinoma and other malignancies.

Pazopanib (GW-786034) is a second-generation multitargeted tyrosine kinase inhibitor against VEGFR1, -2 and -3, PDGFRalpha, PDGFRbeta and c-Kit. Preclinical evaluation has revealed excellent anti-angiogenic and antitumor activity in several tumors. A phase II clinical trial of pazopanib in untreated or cytokine/bevacizumab-pretreated renal cell carcinoma (RCC) has demonstrated promising activity accompanied by a favorable toxicity profile. A placebo-controlled phase III trial in untreated or cytokine-treated patients with RCC demonstrated a significant improvement in progression-free survival. Ongoing trials are further evaluating pazopanib in a variety of other malignancies.