Altiratinib

• CAT Number: I001320
• CAS Number: 1345847-93-9
• Molecular Formula: C26H21F3N4O4
• Molecular Weight: 510.46
• Purity: ≥95%
• Synonyms: 1-N’-[4-[2-(cyclopropanecarbonylamino)pyridin-4-yl]oxy-2,5-difluorophenyl]-1-N-(4-fluorophenyl)cyclopropane-1,1-dicarboxamide
• InChI: InChI=1S/C26H21F3N4O4/c27-15-3-5-16(6-4-15)31-24(35)26(8-9-26)25(36)32-20-12-19(29)21(13-18(20)28)37-17-7-10-30-22(11-17)33-23(34)14-1-2-14/h3-7,10-14H,1-2,8-9H2,(H,31,35)(H,32,36)(H,30,33,34)
• InChIKey: GNNDEPIMDAZHRQ-UHFFFAOYSA-N
• SMILES: C1CC1C(=O)NC2=NC=CC(=C2)OC3=C(C=C(C(=C3)F)NC(=O)C4(CC4)C(=O)NC5=CC=C(C=C5)F)F

Altiratinib (DCC-2701) is a multi-targeted kinase inhibitor with IC50s of 2.7, 8, 9.2, 9.3, 0.85, 4.6, 0.83 nM for MET, TIE2, VEGFR2, FLT3, Trk1, Trk2, and Trk3 respectively.
Altiratinib also inhibits MET isoforms METD1228H, MET D1228N, METY1230C, METY1230D, METY1230H, METM1250T with IC50s of 3.6, 1.3, 1.2, 0.37, 1.5 and 6 nM, respectively. Altiratinib inhibits MET phosphorylation with IC50 values of 0.85 and 2.2 nM, respectively. In the U-87 glioblastoma cell line, MET and HGF are both expressed. Altiratinib blocks autocrine activation of MET phosphorylation in these cells (IC50=6.2 nM). Altiratinib potently inhibits cellular proliferation in MET-amplified EBC-1 and MKN-45 cells, as well as TPM3-TRKA fusion KM-12 cells. Activation of MET is known to increase the motility and invasiveness of cancer cells: Altiratinib inhibits HGF-induced A549 cell migration, with an IC50 of 13 nM. Altiratinib also inhibits FLT3-ITD mutant MV-4-11 cell proliferation with an IC50 of 12 nM[1].
A single oral dose of 30 mg/kg Altiratinib leads to >95% inhibition of MET phosphorylation for the entire 24-hour period. A single 10 mg/kg oral dose of Altiratinib exhibits complete inhibition of MET phosphorylation through 12 hours and 73% inhibition at 24 hours postdose. Altiratinib dosed at 10 mg/kg twice a day leads to a significant 90% decrease in BLI signal. Altiratinib exhibits properties amenable to oral administration and exhibits substantial blood–brain barrier penetration, an attribute of significance for eventual treatment of brain cancers and brain metastases[1].

Reference

[1]. Smith BD, et al. Altiratinib Inhibits Tumor Growth, Invasion, Angiogenesis, and Microenvironment-Mediated DrugResistance via Balanced Inhibition of MET, TIE2, and VEGFR2. Mol Cancer Ther. 2015 Sep;14(9):2023-34.
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