Comparative studies on the inhibition of liver amidases, aminopeptidase and serum cholinesterases by EPN
Description
Abstract The hydrolysis of isocarboxazid, a monoamine oxidase inhibitor, by rat liver homogenate was inhibited after treatment of rats with EPN at doses below those which inhibited serum cholinesterase. After single doses of EPN (5–15 mg/kg), almost complete inhibition of isocarboxazid amidase occurred sooner, and persisted longer, than cholinesterase inhibition. Tissue monoamine oxidase inhibition by isocarboxazid was reduced by pretreatment with EPN in rats. Administration of EPN for 3 consecutive days at lower doses (0.5–2.5 mg/kg) caused no inhibition of cholinesterase but produced a small, consistent, inhibition of liver isocarboxazid amidase. In this study the liver isocarboxazid amidase was shown to be a more sensitive indicator of exposure to EPN intoxication than serum cholinesterase inhibition.
Journal
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- Toxicology and Applied Pharmacology
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Toxicology and Applied Pharmacology 25 (4), 553-559, 1973-08
Elsevier BV