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Am J Physiol Gastrointest Liver Physiol 283: G561-G566, 2002. First published April 10, 2002; doi:10.1152/ajpgi.00462.2001
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Vol. 283, Issue 3, G561-G566, September 2002

Hepatic leukocyte recruitment in a model of acute colitis

Jeffrey R. Scott and Alison E. Fox-Robichaud

Intestinal Disease Research Programme, Department of Medicine, McMaster University, Hamilton, Ontario, Canada L8N 3Z5

There is a close relationship between inflammatory bowel disease (IBD) and various hepatobiliary disorders. The objective of this study was to determine whether hepatic leukocyte recruitment occurs in experimental colitis. We used the murine model of colitis induced by 2,4-dinitrobenezenesulfonic acid (DNBS). Male C57Bl/6 mice received an intrarectal injection of 4 mg DNBS in 100 µl 50% ethanol. Controls received 100 µl 50% ethanol. The hepatic microcirculation was examined at 3 and 14 days post-DNBS by intravital video microscopy. Three days post-DNBS, when mice had developed acute colitis, there was associated hepatic leukocyte recruitment. Within the postsinusoidal venules there was a fourfold increase in the flux of rolling leukocytes that was P-selectin dependent but not alpha 4-integrin dependent. There was also an increase in stationary leukocytes within the sinusoids, although this was not associated with an increase in serum alanine transaminase. By 14 days post-DNBS when macroscopic evidence of colonic inflammation was resolved, rolling within the postsinusoidal venules had returned to control levels. In this murine model of colitis, we describe a link between acute colonic inflammation and remote hepatic leukocyte recruitment that is P-selectin dependent. Active IBD may lead to remote hepatic inflammation.

inflammatory bowel disease; intravital microscopy; microcirculation; P-selectin; integrins


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