当前位置： SCI文献检索 > DIGESTIVE DISEASES AND SCIENCES期刊下所有文献 > Mucosal addressin cell adhesion molecule (MAdCAM-1) expression is upregulated in the cirrhotic liver and immunolocalises to the peribiliary plexus and lymphoid aggregates.

Mucosal addressin cell adhesion molecule (MAdCAM-1) expression is upregulated in the cirrhotic liver and immunolocalises to the peribiliary plexus and lymphoid aggregates.

Abstract：

BACKGROUND:Enhanced cell expression of MAdCAM-1 is critical in tissue recruitment of lymphocytes in response to stimuli expressing the α4β7 integrin. MAdCAM-1 is well characterized in gut mucosa with emerging evidence of hepatic expression. AIMS:(i) Compare quantitative/semi-quantitatively MAdCAM-1 expression in relation to early and advanced liver diseases (ii) Define the fine structure of vascular plexuses/lymphatics in the portal tract on which MAdCAM-1 is expressed. METHODS:Using alkaline phosphatase anti-alkaline phosphatase methodology on paraffin embedded tissue sections (n=28) from cirrhotic individuals who underwent orthotopic liver transplant, we evaluated MAdCAM-1 expression and compared with pre-cirrhotic, fulminant hepatitis B, and non-cirrhotic portal hypertension tissue sections. The positive controls included normal colon tissue with negative controls without primary antibody and isotype-matched purified IgG. We developed a real time PCR to quantify levels of MAdCAM-1 mRNA in our samples. RESULTS:MAdCAM-1 was expressed in 27/28 of the cirrhotic sections, localized primarily to septal areas within (i) endothelium of the peribiliary vascular plexus (PBP) (ii) lymphoid aggregates, with absence from normal, non-cirrhotic portal hypertension and pre-cirrhotic livers. There was significant upregulation of MAdCAM-1 mRNA in cirrhosis (p<0.011), consistent with immunohistochemical analysis. CONCLUSIONS:MAdCAM-1 is up-regulated in cirrhosis with expression on PBP and lymphoid aggregates. MAdCAM-1 is likely to contribute to the localization and recruitment of α4β7 lymphocytes during the pathogenesis of cirrhosis. MAdCAM-1 could be a useful marker of advanced liver disease. Further studies with respect to the expression of MAdCAM-1 in the presence of reversible and non-reversible stages of liver disease may be of merit.

journal_name

Dig Dis Sci

journal_title

Digestive diseases and sciences

authors

Ala A,Brown D,Khan K,Standish R,Odin JA,Fiel MI,Schiano TD,Hillan KJ,Rahman SA,Hodgson HJ,Dhillon AP

doi

10.1007/s10620-013-2755-1

subject

Has Abstract

pub_date

2013-09-01 00:00:00

pages

2528-41

issue

eissn

0163-2116

issn

1573-2568

journal_volume

pub_type

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Mucosal addressin cell adhesion molecule (MAdCAM-1) expression is upregulated in the cirrhotic liver and immunolocalises to the peribiliary plexus and lymphoid aggregates.