1-Methyl-1H-pyrazole-5-carboxamide Derivatives Exhibit Unexpected Acute Mammalian Toxicity.
Basic Information
ID: ALA4765471
Journal: J Med Chem
Title: 1-Methyl-1H-pyrazole-5-carboxamide Derivatives Exhibit Unexpected Acute Mammalian Toxicity.
Authors: Preston S,Garcia-Bustos J,Hall LG,Martin SD,Le TG,Kundu A,Ghoshal A,Nguyen NH,Jiao Y,Ruan B,Xue L,Huang F,Chang BCH,McGee SL,Wells TNC,Palmer MJ,Jabbar A,Gasser RB,Baell JB
Abstract: A series of 1-methyl-1H-pyrazole-5-carboxamides were synthesized as potent inhibitors of the parasitic nematode of sheep, Haemonchus contortus. These compounds did not show overt cytotoxicity to a range of mammalian cell lines under standard in vitro culture conditions, had high selectivity indices, and were progressed to an acute toxicity study in a rodent model. Strikingly, acute toxicity was observed in mice. Experiments measuring cellular respiration showed a dose-dependent inhibition of mitochondrial respiration. Under these conditions, potent cytotoxicity was observed for these compounds in rat hepatocytes suggesting that the potent acute mammalian toxicity of this chemotype is most likely associated with respiratory inhibition. In contrast, parasite toxicity was not correlated to acute toxicity or cytotoxicity in respiring cells. This paper highlights the importance of identifying an appropriate in vitro predictor of in vivo toxicity early on in the drug discovery pipeline, in particular assessment for in vitro mitochondrial toxicity.
CiteXplore: 33352050
DOI: 10.1021/acs.jmedchem.0c01793
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