Pamufetinib (TAS-115) mesylate is a potent VEGFR and hepatocyte growth factor receptor ( c-Met/HGFR )-targeted kinase inhibitor, with IC 50 s of 30 and 32 nM for rVEGFR2 and rMET, respectively. In Vitro Pamufetinib mesylate powerfully suppresses the VEGF-dependent proliferation of HUVECs (IC 50 =0.019 μM) as a VEGFR-targeted inhibitor and powerfully suppresses the proliferation of MET-amplified cancer cells (GI 50 =0.032-0.362 μM) as a MET-targeted inhibitor. Pamufetinib mesylate has much less toxicity in various normal cell lines when compared with other VEGFR-targeted kinase inhibitors. Crizotinib and Pamufetinib mesylate inhibit Met phosphorylation and reverse erlotinib resistance and VEGF production triggered by HGF in PC-9 and HCC827 cells. MCE has not independently confirmed the accuracy of these methods. They are for reference only. In Vivo Pamufetinib mesylate completely suppresses the progression of MET-inactivated tumor by blocking angiogenesis without toxicity when given every day for 6 weeks, even at a serum-saturating dose of Pamufetinib mesylate. Pamufetinib mesylate induces marked tumor shrinkage and prolonges survival in MET-amplified human cancer–bearing mice . MCE has not independently confirmed the accuracy of these methods. They are for reference only. Cell Assay Tumor cells (8000 cells/800 mL) with or without TAS-115 (1.0 μM) or erlotinib (0.3 μM) in the lower Transwell collagen–coated chambers are cocultured with MRC-5 (1000 cells/300 μL) cells in the upper chamber for 72 hours. The upper chamber is then removed. Cell viability is measured using the MTT assay. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Form:Solid IC50& Target:IC50: 30 nM (rVEGFR2), 32 nM (rMET)