Motesanib Diphosphate

• CAT Number: I005155
• CAS Number: 857876-30-3
• Molecular Formula: C22H29N5O9P2
• Molecular Weight: 569.44
• Purity: ≥95%
• Synonyms: N-(3,3-dimethyl-1,2-dihydroindol-6-yl)-2-(pyridin-4-ylmethylamino)pyridine-3-carboxamide;phosphoric acid
• InChI: InChI=1S/C22H23N5O.2H3O4P/c1-22(2)14-26-19-12-16(5-6-18(19)22)27-21(28)17-4-3-9-24-20(17)25-13-15-7-10-23-11-8-15;2*1-5(2,3)4/h3-12,26H,13-14H2,1-2H3,(H,24,25)(H,27,28);2*(H3,1,2,3,4)
• InChIKey: ONDPWWDPQDCQNJ-UHFFFAOYSA-N
• SMILES: CC1(CNC2=C1C=CC(=C2)NC(=O)C3=C(N=CC=C3)NCC4=CC=NC=C4)C.OP(=O)(O)O.OP(=O)(O)O

Motesanib Diphosphate (AMG 706 Diphosphate) is a potent ATP-competitive inhibitor of VEGFR1/2/3 with IC50s of 2 nM/3 nM/6 nM, respectively, and has similar activity against Kit, and is approximately 10-fold more selective for VEGFR than PDGFR and Ret.
Motesanib Diphosphate (AMG 706 Diphosphate) has broad activity against the human VEGFR family, and displays over 1000-fold selectivity against EGFR, Src, and p38 kinase.Motesanib Diphosphate (AMG 706 Diphosphate) significantly inhibits VEGF-induced cellular proliferation of HUVECs with an IC50 of 10 nM, while displaying little effect at bFGF-induced proliferation with an IC50 of >3,000 nM. Motesanib Diphosphate (AMG 706 Diphosphate) also potently inhibits PDGF-induced proliferation and SCF-induced c-kit phosphorylation with IC50 of 207 nM and 37 nM, respectively, but not effective against the EGF-induced EGFR phosphorylation and cell viability of A431 cells[1]. Although displaying little antiproliferative activity on cell growth of HUVECs alone, Motesanib Diphosphate (AMG 706 Diphosphate) treatment significantly sensitizes the cells to fractionated radiation[2].
Motesanib Diphosphate (AMG 706 Diphosphate) (100 mg/kg) significantly inhibits VEGF-induced vascular permeability in a time-dependent manner. Oral administration of Motesanib twice daily or once daily potently inhibits, in a dose-dependent manner, VEGF-induced angiogenesis using the rat corneal model with ED50 of 2.1 mg/kg and 4.9 mg/kg, respectively. Motesanib Diphosphate (AMG 706 Diphosphate) induces a dose-dependent tumor regression of established A431 xenografts by selectively targeting neovascularization in tumor cells[1]. Motesanib Diphosphate (AMG 706 Diphosphate) in combination with radiation displays significant anti-tumor activity in head and neck squamous cell carcinoma (HNSCC) xenograft models[2]. Motesanib Diphosphate (AMG 706 Diphosphate) treatment also induces significant dose-dependent reductions in tumor growth and blood vessel density of MCF-7, MDA-MB-231, or Cal-51 xenografts, which can be markedly enhanced when combined with docetaxel or tamoxifen[3].

Reference

[1]. Polverino A, et al. AMG 706, an oral, multikinase inhibitor that selectively targets vascular endothelial growth factor, platelet-derived growth factor, and kit receptors, potently inhibits angiogenesis and induces regression in tumor xenografts. Cancer Res. 2006 Sep 1;66(17):8715-21.
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[2]. Kruser TJ, et al. Augmentation of radiation response by motesanib, a multikinase inhibitor that targets vascular endothelial growth factor receptors. Clin Cancer Res, 2010, 16(14), 3639-3647.
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[3]. Coxon A, et al. Broad antitumor activity in breast cancer xenografts by motesanib, a highly selective, oral inhibitor of vascular endothelial growth factor, platelet-derived growth factor, and Kit receptors. Clin Cancer Res, 2009, 15(1), 110-118.
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