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- W2000722209 abstract "Intraepithelial migration of lymphoid cells (epitheliotropism) through the basement membrane of the bile duct is a key event in the development of chronic non-suppurative destructive cholangitis (CNSDC) and eventual immune-mediated bile duct loss in primary biliary cirrhosis (PBC). Cell-to-cell and cell-to-extracellular matrix proteins may play an important role in the development of CNSDC. To address the events of epitheliotropism in CNSDC, the expression of cell-matrix adhesion molecules such as integrins alpha1, alpha3, alpha4, alpha5, and alpha6 and the distribution of fibronectin, laminin, and collagen type IV were studied immunohistochemically, with emphasis on both infiltrating lymphocytes and the bile ducts, in frozen sections from 15 PBC cases and 34 controls (chronic viral hepatitis, extrahepatic biliary obstruction, and normal liver). In PBC and chronic viral hepatitis, most of the infiltrating lymphoid cells expressed integrin alpha4, while such expression was less common in extrahepatic biliary obstruction and normal liver. A biliary basement membrane-like structure was delineated by immunostaining of collagen type IV and laminin in PBC and controls. On the basement membrane of CNSDC, fibronectin, a ligand of integrin alpha4, was strongly and frequently expressed in PBC, while such expression on the biliary basement membrane was rare in other controls. These results suggest that increased fibronectin expression on the biliary basement membrane and integrin alpha4-fibronectin interaction facilitate adhesion and the penetration of infiltrating alpha4-expressing lymphocytes into the biliary epithelial layer in PBC." @default.
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- W2000722209 date "2000-01-01" @default.
- W2000722209 modified "2023-10-05" @default.
- W2000722209 title "Immunohistochemical analysis of cell-matrix adhesion molecules and their ligands in the portal tracts of primary biliary cirrhosis" @default.
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- W2000722209 doi "https://doi.org/10.1002/(sici)1096-9896(200001)190:1<93::aid-path507>3.0.co;2-a" @default.
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