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Am J Physiol Gastrointest Liver Physiol. 2003 Sep;285(3):G621-9. Epub 2003 May 28.

IL-6 is essential for development of gut barrier dysfunction after hemorrhagic shock and resuscitation in mice.

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1
Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15260, USA.

Abstract

We sought to determine the role of IL-6 as a mediator of the alterations in gut barrier function that occur after hemorrhagic shock and resuscitation (HS/R). C57Bl/6 wild-type (WT) and IL-6 knockout (KO) mice on a C57Bl/6 background were subjected to either a sham procedure or HS/R. Organ and tissue samples were obtained 4 h after resuscitation. In WT mice, HS/R significantly increased ileal mucosal permeability to fluorescein isothiocyanate-labeled dextran (average molecular mass, 4 kDa) and bacterial translocation to mesenteric lymph nodes. These alterations in gut barrier function were not observed in IL-6 KO animals. HS/R increased ileal steady-state mRNA levels for IL-6, TNF, and IL-10 in WT but not in IL-6 KO mice. Ileal mucosal expression of the tight junction protein, ZO-1, decreased after HS/R in WT but not IL-6 KO mice. Collectively, these data support the view that expression of IL-6 is essential for the development of gut barrier dysfunction after HS/R.

PMID:
12773301
DOI:
10.1152/ajpgi.00177.2003
[Indexed for MEDLINE]
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