Collins, Colm B. and Aherne, Carol M. and Ehrentraut, Stefan F. and Gerich, Mark E. and McNamee, Eóin N. and McManus, Martine and Lebsack, Matthew D.P. and Jedlicka, Paul and Azam, Tania and de Zoeten, Edwin F. and Dinarello, Charles A. and Rivera-Nieves, Jesus (2013) Alpha-1-antitrypsin Therapy Ameliorates Acute Colitis and Chronic Murine Ileitis. Inflammatory Bowel Diseases, 19 (9). pp. 1964-1973. ISSN 1536-4844

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Abstract

Background: Fecal alpha-1-antitrypsin (AAT) clearance has been a marker of clinical disease severity in inflammatory bowel diseases (IBDs) for many years. Although AAT deficiency is more often associated with lung and liver pathologies, AAT-deficient patients with concomitant IBD have been shown to develop more aggressive disease and rapid progression to surgery. Although recent studies have highlighted the pleiotropic anti-inflammatory functions of AAT, including reducing proinflammatory cytokine production and suppressing immune cell activation, its potential therapeutic role in IBD has not been described. Methods: The therapeutic potential of human AAT administration was assessed in murine models of IBD including new-onset and established chemically induced colitis and spontaneous chronic murine ileitis. Histological assessment of inflammation, cytokine secretion profiling, and flow cytometric evaluation of inflammatory infiltrate were performed in each model. The effect of AAT on intestinal barrier function was also examined both in vitro and in vivo. Results: AAT attenuated inflammation in small and large intestinal IBD models through reduced secretion of proinflammatory cytokines, inflammatory cell infiltration, and reduced tissue injury. AAT also increased intestinal restitution after chemically induced colitis. AAT significantly decreased intestinal permeability in vitro and in vivo as part of a protective mechanism for both acute and chronic models of IBD. Conclusions: Our findings describe a beneficial role for AAT in IBD models through suppression of cytokine production and enhanced intestinal barrier function. This raises the possibility that AAT supplementation, which has a long history of proven safety, may have a therapeutic effect in human IBD.

Item Type:	Article
Keywords:	mucosal; inflammation; inflammatory bowel disease;
Academic Unit:	Faculty of Science and Engineering > Biology
Item ID:	12591
Identification Number:	https://doi.org/10.1097/MIB.0b013e31829292aa
Depositing User:	Eoin McNamee
Date Deposited:	23 Mar 2020 12:20
Journal or Publication Title:	Inflammatory Bowel Diseases
Publisher:	Oxford University Press
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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