Catalog No.S1003 Synonyms: AL39324,RG3635
Molecular Weight(MW): 375.41
Linifanib (ABT-869) is a novel, potent ATP-competitive VEGFR/PDGFR inhibitor for KDR, CSF-1R, Flt-1/3 and PDGFRβ with IC50 of 4 nM, 3 nM, 3 nM/4 nM and 66 nM respectively, mostly effective in mutant kinase-dependent cancer cells (i.e. FLT3). Phase 3.
Cited by 10 Publications
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(B and C) KMCH-1 cells were plated alone (monoculture) or together with PDGF-BB-secreting LX-2 cells (co-culture) in a transwell insert co-culture system (KMCH-1 cells in the bottom wells and LX-2 cells in the inserts; 1:1 ratio) for 2 days. Cells were treated as indicated with vehicle, rhTRAIL (10 ng/ml for 6 h on day 2), rhTRAIL plus imatinib [rhTRAIL:10 ng/ml for 6 h on day 2; Imatinib: 5 μmol/L for 24 h (day2)], or rhTRAIL plus linifanib [rhTRAIL: 10 ng/ml for 6 h on day 2; Linifanib:0.5 μmol/L for 24 h (day2)]. After rhTRAIL treatment for 6 h,KMCH-1 cells were analysed for apoptotic nuclear morphology by DAPI-staining (B) and for DNA fragmentation by transferasemediated dUTP nick end labelling assay (C) with quantification of apoptotic nuclei by fluorescence microscopy.
Liver Int 2011 32, 400-409. Linifanib (ABT-869) purchased from Selleck.
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|Description||Linifanib (ABT-869) is a novel, potent ATP-competitive VEGFR/PDGFR inhibitor for KDR, CSF-1R, Flt-1/3 and PDGFRβ with IC50 of 4 nM, 3 nM, 3 nM/4 nM and 66 nM respectively, mostly effective in mutant kinase-dependent cancer cells (i.e. FLT3). Phase 3.|
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. 
|In vivo||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. |
Kinase assays:Potencies (IC50 values) are determined by assays of active kinase domains cloned and expressed in baculovirus using the FastBacbaculovirus expression system or obtained commercially. For tyrosine kinase assays, a biotinylated peptide substrate containing a single tyrosine is used with 1 mM ATP, anEu-cryptate–labeled anti-phosphotyrosine antibody (PT66), and Strepavidin-APC in a homogeneous time-resolved fluorescence assay. Serine/threonine kinases are assayed using 5 μM ATP, [33P]ATP, and a biotinylated peptide substrate with peptide capture and incorporation of 33P determined using a SA-Flashplate. Linifanib is assayed at multiple concentrations prepared by serial dilution of a DMSO stock solution of Linifanib. The concentration resulting in 50% inhibition of activity is calculated using nonlinear regression analysis of the concentration response data.
-  Albert DH, et al. Mol Cancer Ther, 2006, 5(4), 995-1006.
-  Guo J, et al. Mol Cancer Ther, 2006, 5(4), 1007-1013.
-  Hernandez-Davies JE, et al. Mol Cancer Ther, 2011, 10(6), 949-959.
|In vitro||DMSO||75 mg/mL (199.78 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
30% PEG400+0.5% Tween80+5% propylene glycol
For best results, use promptly after mixing.
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