Liver lipid peroxidation and glutathione-related defence enzyme systems in mice treated with paracetamol.

J Appl Toxicol

Department of Biochemistry, Istanbul Faculty of Medicine, University of Istanbul, Capa, Turkey.

Published: December 1994

AI Article Synopsis

  • Glutathione levels decreased and lipid peroxide levels increased in liver tissues 6 hours after paracetamol treatment (500 mg/kg).
  • Cytosolic glutathione S-transferase (GST) activity declined, while glutathione peroxidase (GSH-Px) activity stayed the same.
  • In liver microsomes, lower lipid peroxide levels coincided with increased GST and GSH-Px activity, suggesting these enzymes help protect against lipid peroxidation.

Article Abstract

Glutathione levels were found to be decreased while lipid peroxide levels were increased in total liver homogenates 6 h following paracetamol treatment (500 mg kg-1 i.p.). Furthermore, it has been determined that cytosolic glutathione S-transferase (GST) activity was decreased and glutathione peroxidase (GSH-Px) activity remained unchanged. On the other hand, a decrease in liver microsomal lipid peroxide levels and an increase in GST and GSH-Px activity has been observed. We concluded that decreased lipid peroxide levels in microsomes could be a consequence of increased GSH-Px and GST enzyme activities. In this way, these glutathione-related defence enzyme systems may play an important role in protecting microsomes from lipid peroxidation.

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http://dx.doi.org/10.1002/jat.2550140410DOI Listing

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