A multi-kinase inhibitor
Dovitinib is a multi-kinase inhibitor.1 It inhibits the receptor tyrosine kinases FLT3, CSF1R, and c-Kit (IC50s = 1, 36, and 2 nM, respectively), as well as FGFR1, FGFR3, VEGFR1-3, PDFGRα, and PDGFRβ (IC50s = 8, 9, 10, 13, 8, 27, and 210 nM, respectively). Dovitinib inhibits proliferation of human multiple myeloma cell lines expressing mutant, but not wild-type, FGFR3 (IC50s = 90-550 and >2,500 nM, respectively). It decreases FGF-induced ERK1/2 phosphorylation and induces apoptosis in patient-derived multiple myeloma cells when used at a concentration of 500 nM. Dovitinib (3-300 mg/kg for eight days) inhibits bFGF-induced angiogenesis in a Matrigel? plug assay in mice.2 It reduces tumor growth in KM12L4A colon, DU145 prostate, and MV4-11 acute myelogenous leukemia mouse xenograft models with ED50 values of 17, 23, and 3 mg/kg per day, respectively.
1.Trudel, S., Li, Z.H., Wei, E., et al.CHIR-258, a novel, multitargeted tyrosine kinase inhibitor for the potential treatment of t(4;14) multiple myelomaBlood105(7)2941-2948(2005) 2.Renhowe, P.A., Pecchi, S., Shafer, C.M., et al.Design, structure-activity relationships and in vivo characterization of 4-amino-3-benzimidazol-2-ylhydroquinolin-2-ones: A novel class of receptor tyrosine kinase inhibitorsJ. Med. Chem.52(2)278-292(2009)
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Cell experiment: |
To determine IC50 for SK-HEP1 cells, cells are plated at a density of 2×104 cells per dish. After 48 h, cells are treated with 0, 0.01, 0.1, 1, 5, 10, 50, 100 μM dovitinib in DMEM containing 1% FBS for 24 h. Cell viability is determined with Cell Proliferation Assay. IC50 is calculated by nonlinear regression analysis using GraphPad Prism software[2]. |
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Animal experiment: |
Mice: Six HCC lines (06-0606, 26-0808A, 26-1004, 25-0705A, 5-1318, 21-0208) are used to establish tumors in male SCID mice. or dose-esponse experiments, mice bearing the 06-0606 xenografts re orally given vehicle (5% dextrose) or two doses of dovitinib (50 and 75 mg/kg) daily for 14 days. For time-dependent inhibition of dovitinib targets, mice bearing 06-0606 tumors are given orally 200 μL of either vehicle (n=6) or 50 mg/kg/day of dovitinib (n=10)[2]. |
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参考文献: [1]. Trudel S, et al. CHIR-258, a novel, multitargeted tyrosine kinase inhibitor for the potential treatment of t(4;14) multiple myeloma. Blood. 2005, 105(7), 2941-2948. |
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