Lessons from (S)-6-(1-(6-(1-Methyl-1H-pyrazol-4-yl)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)ethyl)quinoline (PF-04254644), an Inhibitor of Receptor Tyrosine Kinase c-Met with High Protein Kinase Selectivity but Broad Phosphodiesterase Family Inhibition Leading to Myocardial Degeneration in Rats
摘要:
The hepatocyte growth factor (HGF)/c-Met signaling axis is deregulated in many cancers and plays important roles in tumor invasive growth and metastasis. An exclusively selective c-Met inhibitor (S)-6-(1-(6-(1-methyl-1H-pyrazol -4-yl) - [1,2,4] triazolo [4,3-b pyridazin- 3-yl) ethyl) quinoline (8) was discovered from a highly selective high-throughput screening hit. via structure-based drug design and medicinal chemistry lead optimization. Compound 8 had many attractive properties meriting preclinical evaluation. Broad off-target screens identified 8 as a pan-phosphodiesterase (PDE) family inhibitor, which was implicated in a sustained increase in heart rate, increased cardiac output, and decreased contractility indices, as well as myocardial degeneration in in vivo safety evaluations in rats. Compound 8 was terminated as a preclinical candidate because of a narrow therapeutic window in cardio-related safety. The learning from multiparameter lead optimization and strategies to avoid the toxicity attrition at the late stage of drug discovery are discussed.
The present disclosure relates to triazolopyridazine protein kinase modulators of Formula (I), methods of using these compounds to treat diseases mediated by kinase activity.
[EN] TRIAZOLOPYRIDAZINE PROTEIN KINASE MODULATORS<br/>[FR] MODULATEURS DE PROTÉINES KINASES À BASE DE TRIAZOLOPYRIDAZINES
申请人:SGX PHARMACEUTICALS INC
公开号:WO2008051805A2
公开(公告)日:2008-05-02
[EN] The present disclosure relates to tirazalopyridazine protein kinase modulators and methods of using these compounds to treat diseases mediated by kinase activity. [FR] La présente invention concerne des modulateurs de protéines kinases à base de triazolopyridazines et des procédés d'utilisation de ces composés pour traiter des maladies médiées par une activité kinase.