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Halothane hepatotoxicity in glutathione depleted rats
Journal of Applied Toxicology : JAT
|April 1, 1987
Summary
This study reveals that glutathione depletion worsens halothane-induced liver injury in rats. (+)-Catechin demonstrated protective effects against this toxicity, suggesting its potential therapeutic role.
Area of Science:
- Hepatotoxicity
- Pharmacology
- Biochemistry
Background:
- Halothane hepatotoxicity models require specific induction and hypoxic conditions.
- The role of glutathione (GSH) in halothane metabolism remains unclear.
Purpose of the Study:
- To investigate the role of GSH in halothane metabolism and hepatotoxicity.
- To evaluate the protective effects of (+)-catechin and diethyldithiocarbamate against halothane-induced liver injury.
Main Methods:
- Male rats were pretreated with phorone to deplete hepatic GSH and phenobarbital for enzyme induction.
- Rats were exposed to 1% halothane under hypoxic conditions (10% O2).
- Serum enzyme activities (GPT, SDH), histomorphological changes, and plasma fluoride levels were assessed.
Main Results:
- Halothane exposure caused significant increases in GPT and SDH, and centrilobular hepatic necrosis.
- GSH depletion aggravated halothane-induced liver injury.
- (+)-Catechin administration reduced liver enzyme elevations and morphological damage, while diethyldithiocarbamate showed no protective effect.
Conclusions:
- Glutathione may be involved in the non-oxidative metabolic pathways of halothane.
- (+)-Catechin offers protection against halothane hepatotoxicity, likely by mitigating the effects of toxic metabolites from reductive pathways.