Discovery of N-((4-([1,2,4]Triazolo[1,5-a]pyridin-6-yl)-5-(6-methylpyridin-2-yl)-1H-imidazol-2-yl)methyl)-2-fluoroaniline (EW-7197) : A Highly Potent, Selective, and Orally Bioavailable Inhibitor of TGF-beta Type I Receptor Kinase as Cancer Immunotherapeutic/Antifibrotic Agent
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2014
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000090873
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/jm500115w
초록/요약
A series of 2-substituted-4-([1,2,4]triazolo[1,5-a]pyridin-6-yl)-5-(6-methylpyriclin-2-yl)imidazoles was synthesized and evaluated to optimize a prototype inhibitor of TGF-beta type I receptor kinase (ALK5), 6. Combination of replacement of a quinoxalin-6-yl moiety of 6 with a [1,2,4]triazolo[1,5-a]pyridin-6-yl moiety, insertion of a methyleneamino linker, and a o-F substituent in the phenyl ring markedly increased ALK5 inhibitory activity, kinase selectivity, and oral bioavailability. The 12b (EW-7197) inhibited ALKS with IC50 value of 0.013 mu M in a kinase assay and with IC50 values of 0.0165 and 0.0121 mu M in HaCaT (3TP-luc) stable cells and 4T1 (3TP-luc) stable cells, respectively, in a luciferase assay. Selectivity profiling of 12b using a panel of 320 protein kinases revealed that it is a highly selective ALKS/ALK4 inhibitor. Pharmacokinetic study with 12b center dot HCl in rats showed an oral bioavailability of 51% with high systemic exposure (AUC) of 1426 ng x h/mL and maximum plasma concentration (C-max) of 1620 ng/mL. Rational optimization of 6 has led to the identification of a highly potent, selective, and orally bioavailable ALK5 inhibitor 12b.
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