Differential expression of antioxidant enzymes in various hepatocellular carcinoma cell lines

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Please use this identifier to cite or link to this item: http://libir.tmu.edu.tw/handle/987654321/13742

Title:	Differential expression of antioxidant enzymes in various hepatocellular carcinoma cell lines
Authors:	施純明 Yang LY;Chen WL;Lin JW;Lee SF;Lee CF;Hung TI;Wei YH;Shih CM
Contributors:	醫學系生化學科
Date:	2005
Issue Date:	2009-10-28 13:54:31 (UTC+8)
Abstract:	Recent evidence suggests that reactive oxygen species (ROS) play an important role in the pathogenesis of various illnesses, and the ROS and antioxidant enzymes are highly associated with cell differentiation and diseases. In this study, we tested the hypothesis that specific antioxidant enzymes are differentially expressed in hepatocellular carcinoma (HCC) cell lines with various degrees of differentiation. We compared the expression of several antioxidant enzymes including catalase (CAT), superoxide dismutase (SOD), glutathione reductase (GRx), and glutathione peroxidase (GPx) in five HCC cell lines with well (Hep G2 and Hep 3B) or poor (HA22T/VGH, HA55T/VGH, and SK-Hep-1) differentiation. Our results showed that both well-differentiated HCC cell lines expressed extremely higher CAT and GRx enzyme activities than all three poorly differentiated ones. Moreover, the protein and mRNA levels of CAT were much higher in two well-differentiated HCC cell lines than in all three poorly differentiated ones. Both well-differentiated HCC cell lines also showed a higher protein or mRNA expression of Cu/ZnSOD and MnSOD than three poorly differentiated ones. Our results demonstrate that specific antioxidant enzymes (especially, CAT and GRx) are differentially expressed in HCC cell lines with well or poor differentiation. These findings suggest that CAT and GRx are two potential differentiation markers for HCC.
Relation:	Journal of Cellular Biochemistry.(96):622-631.
Data Type:	article
Appears in Collections:	[Department of Biochemistry and Molecular Cell Biology] Periodical Article

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