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 generally relates to compounds useful as immunomodulators. Provided herein are compounds, compositions comprising such compounds, and methods of their use. The disclosure further pertains to pharmaceutical compositions comprising at least one compound according to the disclosure that are useful for the treatment of various diseases, including cancer and infectious diseases.
[EN] TRIAZOLOPYRIDAZINE DERIVATIVES<br/>[FR] DÉRIVÉS DE LA TRIAZOLOPYRIDAZINE
申请人:PFIZER PROD INC
公开号:WO2007138472A2
公开(公告)日:2007-12-06
[EN] The invention relates to compounds of the formula (I) or a pharmaceutically acceptable salt thereof, wherein R1, R2, R3 and R3 [FR] La présente invention concerne des composés de formule (I) ou un de leurs sels pharmaceutiquement acceptable, dans laquelle R1, R2, R3 et R3' sont tels que définis ici. L'invention concerne également des compositions pharmaceutiques contenant les composés de formule (I) et des procédés de traitement des affections hyperprolifératives chez un mammifère par l'administration des composés de formule (I).