ICC density predicts bacterial overgrowth in a rat model of post-infectious IBS.

Abstract:

AIM:To investigate the interstitial cells of Cajal (ICC) number using a new rat model. METHODS:Sprague-Dawley rats were assigned to two groups. The first group received gavage with Campylobacter jejuni (C. jejuni) 81-176. The second group was gavaged with placebo. Three months after clearance of Campylobacter from the stool, precise segments of duodenum, jejunum, and ileum were ligated in self-contained loops of bowel that were preserved in anaerobic bags. Deep muscular plexus ICC (DMP-ICC) were quantified by two blinded readers assessing the tissue in a random, coded order. The number of ICC per villus was compared among controls, Campylobacter recovered rats without small intestinal bacterial overgrowth (SIBO), and Campylobacter recovered rats with SIBO. RESULTS:Three months after recovery, 27% of rats gavaged with C. jejuni had SIBO. The rats with SIBO had a lower number of DMP-ICC than controls in the jejunum and ileum. Additionally there appeared to be a density threshold of 0.12 DMP-ICC/villus that was associated with SIBO. If ileal density of DMP-ICC was < 0.12 ICC/villus, 54% of rats had SIBO compared to 9% among ileal sections with > 0.12 (P < 0.05). If the density of ICC was < 0.12 DMP-ICC/villus in more than one location of the bowel, 88% of these had SIBO compared to 6% in those who did not (P < 0.001). CONCLUSION:In this post-infectious rat model, the development of SIBO appears to be associated with a reduction in DMP-ICC. Further study of this rat model might help understand the pathophysiology of post-infectious irritable bowel syndrome.

journal_name

World J Gastroenterol

authors

Jee SR,Morales W,Low K,Chang C,Zhu A,Pokkunuri V,Chatterjee S,Soffer E,Conklin JL,Pimentel M

doi

10.3748/wjg.v16.i29.3680

subject

Has Abstract

pub_date

2010-08-07 00:00:00

pages

3680-6

issue

29

eissn

1007-9327

issn

2219-2840

journal_volume

16

pub_type

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