Erschienen in:
01.01.2007 | Original Paper
Cyclooxygenase-2 Expression in Hepatocellular Carcinoma, Cirrhosis and Chronic Hepatitis in the United States
verfasst von:
Sassan Pazirandeh, Urmila Khettry, Fredric D. Gordon, Robert H. Resnick, Jessica E. Murray, Sunil G. Sheth
Erschienen in:
Digestive Diseases and Sciences
|
Ausgabe 1/2007
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Abstract
Aberrant expression of cyclooxygenase-2 in hepatocellular carcinoma was described in Asia. Using immunohistochemistry, we studied the expression of cyclooxygenase-2 in hepatocellular carcinoma, chronic hepatitis, and cirrhosis in a US institution. A staining score of 0–5 representing the sum of an intensity score and a distribution score was used. The mean scores were 2.2±1.60 for chronic hepatitis, 4.37±1.15 for cirrhosis, and 4.76±0.54 for hepatocellular carcinoma. We found a significant difference in mean staining scores between chronic hepatitis and cirrhosis (p < 0.0001), as well as between chronic hepatitis and hepatocellular carcinoma (p < 0.0001). Fibrosis correlated with cyclooxygenase-2 staining score (r=0.65). In conclusion: (1) Cyclooxygenase-2 expression is higher in cirrhosis and hepatocellular carcinoma when compared to chronic hepatitis. (2) Cyclooxygenase-2 expression correlates with the stage of fibrosis. (3) These results imply that in chronic hepatitis and possibly in cirrhosis, hepatocarcinogenesis may be a cyclooxygenase-2 dependent mechanism.