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• W2078165080 abstract "Alteration of calcium homeostasis has been proposed to play a major role in cell necrosis induced by a variety of chemical agents such as acetaminophen (APAP). In this study, a potential protective effect of the dihydropyridine calcium channel blocking agent, nifedipine, was investigated in vitro on acetaminophen-induced hepatocyte damage. Rat hepatocytes were exposed during 20 hours to various concentrations of APAP (0.50 to 4.00 mM). The following metabolic and functional parameters were investigated : - lactate dehydrogenase (LDH) release as an indicator of plasma membrane integrity, - cell viability evaluated by the colorimetric MTT assay, and intracellular calcium concentration as evaluated by two fluorimetric methods : a scanning laser cytometer using indo-1-AM as fluorescent probe and a fluorescence plate reader using fluo-3-AM as calcium indicator.Incubation of hepatocytes with APAP alone in the range 0.50 to 4.00mM resulted in a dose-response relationship with regard to LDH release (243% to 750% of control) and to the loss of cell viability (0 to 67% of control). Moreover these results were correlated with a significant increase in cytosolic calcium content (189 to 406 nM).Nifedipine treatment prior to APAP exposure, partially prevented LDH release, the plasma membrane blebbing, and thereby the loss of viability. In addition, intracellular calcium level progressively returned within the limits of the control values with increasing concentrations of nifedipine.It can be concluded that, in in vitro conditions, nifedipine pretreatment exhibits a preventive effect against acetaminophen hepatocyte injury." @default.
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• W2078165080 date "1995-01-01" @default.
• W2078165080 modified "2023-10-01" @default.
• W2078165080 title "Protective Effect of Nifedipine Against Cytotoxicity and Intracellular Calcium Alterations Induced by Acetaminophen in Rat Hepatocyte Cultures" @default.
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• W2078165080 doi "https://doi.org/10.3109/01480549509014315" @default.
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