Vitamin C protects against in vitro cytotoxicity of cypermethrin in rat hepatocytes

Patricia Grajeda-Cota, Marco Vinicio Ramírez-Mares, Elvira González De Mejía

Research output: Contribution to journalArticlepeer-review

Abstract

The objective of this study was to investigate the effect of ascorbic acid (AA) on the in vitro cytotoxicity of cypermethrin (CM), and on glutathione (GSH) metabolism in rat hepatocytes. In vitro cell viability, lactate dehydrogenase (LDH), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) leakage were measured, as indicators of hepatic damage, at 1, 15 and 30 min of exposure to CM. Glutathione and the activities of glutathione-S-transferase (GST) and gamma glutamyl transpeptidase (γ-GT) were also measured. CM hepatotoxicity increased in a time and dose-dependent manner. In the presence of 30 μM CM, ALT and AST also increased 49 and 130% (P<0.05), respectively, indicating metabolic hepatocyte damage. AA (1 mM) was capable to preserve 100% of cell integrity and modulated ALT and AST. Furthermore, CM induced a 27% reduction in the endogenous antioxidant GSH, and increased 203% GST and 283% γ-GT (P<0.05), indicating an oxidative insult. The presence of AA showed chemopreventive capacity against CM, recovering 60% of GSH and a 54% decrease in γ-GT activity. These results suggest that AA in a 1:33 (CM:AA) ratio can modulate up to 90% of the damage caused to the cells by CM. It also demonstrates that AA can act as a primary antioxidant and hepatoprotector in rat hepatocytes.

Original languageEnglish (US)
Pages (from-to)13-19
Number of pages7
JournalToxicology in Vitro
Volume18
Issue number1
DOIs
StatePublished - Feb 2004

Keywords

  • Cypermethrin
  • Cytotoxicity
  • Hepatocytes
  • In vitro
  • Vitamin C

ASJC Scopus subject areas

  • Toxicology

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