title: Levels of plasma malondialdehyde and erythrocyte antioxidant enzyme activities in patients with chronic hepatitis B.
abstract: OBJECTIVE
  Hepatitis B virus infection, extensively seen throughout the world, can become highly chronic. Pathogenesis of chronic hepatitis is not yet known fully. It is shown that oxidative stress may play a role in pathogenesis and may regulate collagen synthesis and thus may contribute to the process of liver damage. This study is aimed at investigating the existence of oxidative stress in chronic hepatitis B cases and its relation with alanine aminotransferase and aspartate aminotransferase which are the serum indicators of liver damage; along with interaction of erythrocyte antioxidation enzyme activities in the same cases.
  
  
  METHODS
  Eighty patients with chronic hepatitis B under follow-up, and 40 healthy volunteers were included in this study. In the control and patients groups, together with serological markers for viral etiology, alanine aminotransferase and aspartate aminotransferase levels; plasma malondialdehyde level; erythrocyte superoxide dismutase, glutathione peroxidase and catalase activities were analyzed.
  
  
  RESULTS
  Malondialdehyde levels of chronic hepatitis B cases were statistically high compared to control group (p < 0.05). There was correlation between serum malondialdehyde levels and serum alanine aminotransferase, aspartate aminotransferase levels in the patient group (r = 0.324, p < 0.01, r = 0.273, p < 0.05). Average superoxide dismutase and catalase activities were found to be significantly low compared to control group (p < 0.001); average glutathione peroxidase activity were significantly high when considered statistically (p < 0.001). No correlation between serum alanine aminotransferase and aspartate aminotransferase levels and glutathione peroxidase, catalase and superoxide dismutase activities was found in the patients group (p > 0.05).
  
  
  CONCLUSIONS
  In the study we showed that there is correlation between serum malondialdehyde level and alanine aminotransferase and aspartate aminotransferase levels of chronic hepatitis B patients. According to the results of our study, it might be thought that serum malondialdehyde level might be a marker of hepatocellular damage in chronic hepatitis B cases. We suggest that antioxidant treatment for chronic hepatitis B patients should be examined in future studies.
authors.affiliation: Firat University, Faculty of Medicine (Tip Fakultesi), Department of Clinical Microbiology and Infectious Diseases, TR-23119 Elazig/Turkey. demirdagk@yahoo.com
authors.forename: K
authors.initials: K
authors.lastname: Demirdag
authors.forename: S
authors.initials: S
authors.lastname: Yilmaz
authors.forename: A
authors.initials: A
authors.lastname: Ozdarendeli
authors.forename: M
authors.initials: M
authors.lastname: Ozden
authors.forename: A
authors.initials: A
authors.lastname: Kalkan
authors.forename: S S
authors.initials: SS
authors.lastname: Kilic
mesh_terms: D000328:Adult; D000410:Alanine Transaminase / Q000097:blood; D001219:Aspartate Aminotransferases / Q000097:blood; D002374:Catalase / Q000097:blood*; D004912:Erythrocytes / Q000201:enzymology*; D005260:Female; D005979:Glutathione Peroxidase / Q000097:blood*; D019694:Hepatitis B, Chronic / Q000201:enzymology*; D006801:Humans; D008297:Male; D008315:Malondialdehyde / Q000097:blood*; D008875:Middle Aged; D018384:Oxidative Stress / Q000502:physiology; D012016:Reference Values; D013482:Superoxide Dismutase / Q000097:blood*
chemical_list: D008315:Malondialdehyde; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase