PMID: 9187883May 1, 1997Paper

In-situ immunophenotyping study of hepatic-infiltrating cytotoxic cells in chronic active hepatitis C

European Journal of Gastroenterology & Hepatology
G FioreS Antonaci

Abstract

Beside the hypothesis of a direct viral cytopathy, several lines of evidence argue in favour of hepatic damage triggered by immune-mediated mechanisms in hepatitis C virus (HCV) infection. The intrahepatic localization of HCV antigen-specific cytotoxic T-lymphocytes (CTLs) to disease sites has been described; however, very few data are available about the degree and the role of hepatic-infiltrating natural killer (NK) cells in chronically HCV-infected subjects. In a series of percutaneous needle liver biopsies obtained from 35 consecutive untreated patients with chronic active hepatitis C, we performed an in-situ immunophenotyping study to evaluate the degree of cytotoxic NK cell infiltration as compared to CTLs, the hepatocyte expression of human major histocompatibility complex antigens class I and class II (HLA-I and HLA-II), and cell adhesion molecules (CAM) in the context of liver inflammatory infiltrates. The data were correlated with the histological activity index (HAI) of disease. In-situ immunophenotyping analysis of CAM provided evidence for the intrahepatic expression of leucocyte adhesion molecules (CD11a and CD2) and their corresponding ligands on hepatocytes (CD54 and CD58) in all cases. A significant parallel ex...Continue Reading

Citations

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