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Kitase, A. et al.

In situ detection of oxidized n-3 polyunsaturated fatty acids in chronic hepatitis C: correlation with hepatic steatosis.

BACKGROUND: Oxidative stress contributes to the pathogenesis of chronic hepatitis C. The aim of this study was to assess the peroxidation of n-3 polyunsaturated fatty acids (PUFAs) in the liver and its relation to hepatic steatosis in chronic hepatitis C. METHODS: We immunohistochemically detected malondialdehyde (MDA)-, 4-hydroxy-2-nonenal ( HNE)-, and 4-hydroxy-2-hexenal (HHE)-protein adducts in liver biopsy specimens from 55 patients with chronic hepatitis C. Cells stained positively for HHE-protein adducts were quantified using computer-based image analysis. Fatty-acid composition was determined, by gas chromatography, for the noncancerous portions of resected livers, with or without steatosis, obtained from two patients with hepatitis C virus-associated hepatocellular carcinoma. RESULTS: The detection rate of HHE-protein adducts (63.6%) was significantly higher than that of MDA-protein adducts (21.8%; P < 0.001) or HNE-protein adducts (29.1%; P < 0.001). Areas positively stained for HHE-protein adducts (HHE-positive areas) were significantly larger in 18 patients with steatosis (6.2 +/- 3.6%) than in 17 patients without steatosis (3.4 +/- 2.6%; P = 0.01). Resected liver tissue with steatosis showed a larger HHE-positive area (18.6%) and higher ratio of n-6 PUFA content to n-3 PUFA content (3 : 1) than liver tissue without steatosis (7.2%; 2 : 3). On multivariate analysis, the HHE-positive area (odds ratio, 1.55; 95% confidence interval [CI], 1.08-2.23; P = 0.019) was a factor associated with the presence of hepatic steatosis. CONCLUSIONS: HHE-protein adducts, which are a good marker for oxidative stress, are associated with steatosis in chronic hepatitis C.[1]

References

In situ detection of oxidized n-3 polyunsaturated fatty acids in chronic hepatitis C: correlation with hepatic steatosis. Kitase, A., Hino, K., Furutani, T., Okuda, M., Gondo, T., Hidaka, I., Hara, Y., Yamaguchi, Y., Okita, K. J. Gastroenterol. (2005) [Pubmed]

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