Li W, Zhou HC, Li JC, Duan FL. Expressions of cytokeratin 18 and cytokeratin 19 in hepatocellular carcinoma tissues.
Shijie Huaren Xiaohua Zazhi 2008;
16:721-725. [DOI:
10.11569/wcjd.v16.i7.721]
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Abstract
AIM: To observe the expressions of cytoketatin18 (CK18) and cytoketatin19 (CK19) in tissues of hepatocellular carcinoma, liver cirrhosis, and normal liver.
METHODS: Immunohistochemical streptavidin-peroxidase (SP) method was adopted to examine the expression of CK18 and CK19 in tissue samples of normal liver (n = 8), liver cirrhosis (n = 27), and hepatocellular carcinoma (n = 43).
RESULTS: The positive rates of CK18 expression in hepatic cirrhosis and normal liver tissues had no significant differences. However, CK18 expression was significantly different between hepatocellular carcinoma and liver cirrhosis (65.1% vs 29.6%, P < 0.01). The positive rates of CK19 expression in cirrhosis of liver and normal liver had no significant differences. But the expression of CK19 was markedly higher in hepatocellular carcinoma than that in hepatic cirrhosis (69.8% vs 25.9%, P < 0.01). Oval cells with strongly positive staining could be seen in the portal area of cirrhosis cases (20/27) and in the brink of carcinoma cases (35/43), and there were significant differences (CK18: 6.57 ± 1.69 vs 10.70 ± 2.31; CK19: 5.37 ± 1.17 vs 10.45 ± 2.15, P < 0.01) in the numbers between cirrhosis of liver and hepatocellular carcinoma.
CONCLUSION: CK18 and CK19 are involved in hepatocarcinogenesis. Oval cells are strongly positive for CK18 and CK19 in cirrhosis of liver and hepatocellular carcinoma. Oval cells are associated with regeneration of liver, and are probably original cells of hepatocellular carcinoma.
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