• aminotransferases;
  • antioxidants;
  • hepatitis C;
  • oxidative stress;
  • vitamin C


Objectives: To evaluate the possible relationship between aminotransferases levels and markers of oxidative stress in chronic hepatitis C patients.

Design and methods: Patients without treatment for hepatitis were divided in to group I (15–39 U/L); group II (41–76 U/L) and group III (81–311 U/L) of activity alanine aminotransferase (ALT). Blood markers of oxidative stress [catalase (CAT), glutathione peroxidase (GPx), thiobarbituric acid-reactive species (TBARS), nonprotein and protein thiol (NP-SH and P-SH) groups and vitamin C] were determined.

Results: P-SH and NP-SH levels, TBARS, GPx and CAT were not different between groups. Vitamin C was significantly decreased in groups II (P=0.03) and III (P=0.001) when compared with group I and correlated negatively with aspartate aminotransferase (AST; r=−0.29, P=0.042).

Conclusion: Vitamin C levels were negatively associated with AST, suggesting that vitamin C could be an additional indicator of hepatitis C severity.