Expression and regulation of intercellular adhesion molecule-1 (ICAM-1) in organotypic cultures of rat liver tissue

被引:17
作者
Oudar, O [1 ]
Moreau, A [1 ]
Feldmann, G [1 ]
Scoazec, JY [1 ]
机构
[1] Fac Med Xavier Bichat, INSERM, U327, Biol Cellulaire Lab, F-75870 Paris 18, France
关键词
ICAM-1; liver; organotypic culture; rats;
D O I
10.1016/S0168-8278(98)80117-7
中图分类号
R57 [消化系及腹部疾病];
学科分类号
摘要
Background/Aims: The objective of the present study was to analyze the expression and regulation of intercellular adhesion molecule-1 (ICAM-1) in organotypic cultures of rat liver slices, which preserve the normal microenvironment of liver cells. Methods: Rat liver slices were maintained in culture for 15 min to 24 h and examined for ICAM-1 expression by immunohistochemistry and Western blotting in basal conditions and after stimulation with 1000 IU/ml interferon-gamma (IFN gamma), 1000 IU/ml tumor necrosis factor-alpha (TNF alpha) and 50 mu g/ml endotoxin. Immunohistochemical results were evaluated using a semiquantitative scoring system. Results: In uncultured slices, ICAM-1 was not detected on hepatocytes, In unstimulated liver slices maintained in organotypic culture, ICAM-1 was induced at the surface of scattered hepatocytes (score at 15 min, 0.33 +/- 0.47 and at 24 h, 1.17 +/- 0.69). After 4 h of stimulation, a significant increase in ICAM-1 expression by hepatocytes and adjacent sinusoidal cells, but not by intra-hepatic biliary epithelial cells, was observed for IFN gamma (score: 2.35 +/- 0.47) and endotoxin (score: 2.67 +/- 0.47), but not with TNFa (score: 0.66 +/- 0.47), After 24 h of stimulation, a further increase in the extent of ICAM-1 expression by hepatocytes was observed for IFN gamma (score: 3.67 +/- 0.47) and endotoxin (score: 4.0 +/- 0.0), and a significant overexpression of ICAM-1 by hepatocytes was detectable after treatment with TNF alpha (score: 3.67 +/- 0.47). Conclusions: In rat liver organotypic cultures, TNF alpha, IFN gamma and endotoxin induce the expression of ICAM-1 in hepatocytes and adjacent sinusoidal endothelial cells, but not in portal tracts.
引用
收藏
页码:901 / 909
页数:9
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