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Pazopanib is a potent and selective second generation multi-targeted receptor tyrosine kinase inhibitor of vascular endothelial growth factor receptor (VEGFR), platelet-derived growth factor receptor (PDGFR) and c-kit tyrosine kinases. It is involved in inhibiting signaling pathways, angiogenesis, and cell proliferation. Pazopanib exhibited excellent anti-angiogenic and anti-tumor activity and synergism was observed in combination with chemotherapeutic drugs in several mouse models of a variety of tumors, accompanied by desirable pharmacokinetics and oral bioavailability. It inhibits the intracellular tyrosine kinase portion of all the VEGFR subtypes, and exhibits distinct pharmacokinetic and toxicity profiles compared with other agents among VEGF signaling pathway inhibitors. Recent studies elucidated its importance of signaling cascades related to angiogenesis in the management of RCC.

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