Linifanib (ABT-869)是一种新型有效的ATP竞争性VEGFR/PDGFR抑制剂，作用于KDR，CSF-1R，Flt-1/3和PDGFRβ，其IC50分别为4 nM，3 nM，3 nM/4 nM和66 nM，对突变激酶依赖性癌细胞（即FLT3）最有效。

98% min

Store at -20℃ for one year（Powder）；Store at 2-4℃ for two weeks；Store at -20℃ for six months after dissolution.

ABT-869; AL-39324; ABT 869; ABT869; AL 39324; AL39324; RG3635

DMSO Solubility: 75 mg/mL (199.78 mM)

VEGFR1/FLT1 ,CSF-1R ,VEGFR2/KDR ,FLT3 ,Kit

Linifanib shows inhibitory to Kit, PDGFRβ and Flt4 with IC50 of 14 nM, 66 nM and 190 nM in kinases assay. Linifanib also inhibits ligand-induced KDR, PDGFRβ, Kit, and CSF-1R phosphorylation with IC50 of 2 nM, 2 nM, 31 nM and 10 nM at cellular level and this cellular potency could be affected by serum protein. Linifanib suppresses VEGF-stimulated HUAEC proliferation with IC50 of 0.2 nM. While Linifanib has weak activity against tumor cells which are not induced by VEGF or PDGF, except for MV4-11 leukemia cells (with constitutively active form of Flt3) with IC50 of 4 nM. Linifanib could cause a decrease in S and G2-M phases with a corresponding increase in the sub-G0-G1 apoptotic population in MV4-11 cells. Linifanib binds to the ATP-binding site of CSF-1R with Ki of 3 nM. Linifanib (10 nM) exhibits a reduced phosphorylation of Akt at Ser473 and decreased phosphorylation of GSK3βat Ser9 in Ba/F3 FLT3 ITD cell lines.

Linifanib (0.3 mg/kg) results in complete inhibition of KDR phosphorylation in lung tissue. Linifanib also inhibits the edema response with ED50 of 0.5 mg/kg. Linifanib (7.5 and 15 mg/kg, bid) significantly inhibits both bFGF- and VEGF-induced angiogenesis in the cornea. Linifanib inhibits tumor growth in flank xenograft models including HT1080, H526, MX-1 and DLD-1 with ED75 from 4.5-12 mg/kg. Linifanib also shows efficacy in A431 and MV4-11 xenografts at low dose levels. Linifanib (12.5 mg/kg bid) reveals a decrease of microvasculure density in MDA-231 xenograft. Linifanib shows a Cmax and AUC24 hours with 0.4 μg/mL and 2.7 μg•hour/mL in HT1080 fibrosarcoma model.

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[2] Guo J, et al. Mol Cancer Ther, 2006, 5(4), 1007-1013.

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[4] Jasinghe VJ, et al. J Hepatol. 2008, 49(6), 985-997.

[5] Albert DH, et al. Mol Cancer Ther. 2006, 5(4), 995-1006.