Add time:09/02/2019         Source:sciencedirect.com

Suspensions of renal cells from rats and renal mitochondria from rats and mice were used to assess the sex and species dependence of acute toxicity due to perchloroethylene (Perc) and its glutathione conjugate S-(1,2,2-trichlorovinyl)glutathione (cas 111574-85-7) (TCVG). A marked sex dependence in the acute cytotoxicity of both Perc and TCVG was observed: Perc caused significant release of lactate dehydrogenase (LDH) in isolated kidney cells from male but not female rats, and TCVG caused much more LDH release from male than female rat kidney cells. Assessment of toxicity in suspensions of isolated mitochondria from kidneys of male and female rats revealed a generally similar pattern of sensitivity, with mitochondria from males exhibiting significantly more inhibition of State 3 respiration and decrease of respiratory control ratio than mitochondria from females. Respiratory function in mitochondria from male and female mice, however, was also significantly inhibited by Perc or TCVG but exhibited little sex dependence in the degree of inhibition. Comparison with results from similar studies using the congener trichloroethylene and its glutathione conjugate suggested that Perc and TCVG are more potent nephrotoxicants. Neither Perc nor TCVG produced any significant effects on cytotoxicity or mitochondrial function in isolated hepatocytes from rats or in isolated liver mitochondria from rats or mice, suggesting that the liver is not a major acute target for Perc or its glutathione conjugate. Thus, many of the species-, sex-, and tissue-dependent differences in toxicity of Perc and TCVG that are observed in vivo are also observed in these in vitro models.

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