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Description:
SKLB610, a novel multi-targeted inhibitor, inhibit angiogenesis-related tyrosine kinase VEGFR2, FGFR2 and PDGFR at rate of 97%, 65% and 55%, respectively, at concentration of 10μM in biochemical kinase assays. IC50 Value: Target: VEGFR; FGFR2; PDGFR in vitro: SKLB610 inhibited angiogenesis-related tyrosine kinase VEGFR2, fibroblast growth factor receptor 2 (FGFR2) and platelet-derived growth factor receptor (PDGFR) at rate of 97%, 65% and 55%, respectively, at concentration of 10μM in biochemical kinase assays. In vitro, SKLB610 showed more selective inhibition of VEGF-stimulated human umbilical vein endothelial cells (HUVECs) proliferation, and this proliferation inhibitory effect was associated with decreased phosphorylation of VEGFR2 and p42/44 mitogen-activated protein kinase (p42/44 MAPK). Antiangiogenic evaluation showed that SKLB610 inhibited the HUVECs capillary-tube Formation on Matrigel in vitro and the sub-intestinal vein Formation of zebrafish in vivo. Moreover, SKLB610 inhibited a panel of human cancer cells proliferation in a concentration-dependent manner and human non-small cell lung cancer cell line A549 and human colorectal cancer cell line HCT116 were most sensitive to SKLB610 treatment . in vivo: Chronic intraperitoneally administration of SKLB610 at dose of 50mg/kg/d resulted in significant inhibition in the growth of established human A549 and HCT116 tumor xenografts in nude mice without exhibit toxicity. Histological analysis showed significant reductions in intratumoral microvessel density (CD31 staining) of 43-55% relative to controls depending on the specific tumor xenografts. In conclusion, the present study demonstrated that SKLB610 exhibited its antitumor activity as a multi-targeted inhibitor with more potent inhibition of VEGFR2 activity . Pharmacokinetic studies in rats demonstrated that the oral bioavailability of SKLB610 in nanosuspension (89.4%) was 2.6-fold higher than in coarse suspension (34.1%). Stabilizer type, milling time, and milling speed had a significant effect on particle size of the SKLB610 nanosuspensions .For the detailed information of SKLB610, the solubility of SKLB610 in water, the solubility of SKLB610 in DMSO, the solubility of SKLB610 in PBS buffer, the animal experiment (test) of SKLB610, the cell expriment (test) of SKLB610, the in vivo, in vitro and clinical trial test of SKLB610, the EC50, IC50,and Affinity of SKLB610,