Antitumor agent. Sorafenib is a multikinase inhibitor. It reduces tumor cell proliferation in vitro.
Sorafenib has been shown to inhibit multiple intracellular kinases (c-CRAF, BRAF, and mutant BRAF) and cell surface kinases (KIT, FLT-3, RET, VEGFR-1, VEGFR-2, VEGFR-3, and PDGFR-β). Some of these kinases are thought to be involved in tumor cell signaling, angiogenesis, and apoptosis. Sorafenib inhibits tumor growth in human hepatocellular carcinoma and renal cell carcinoma.