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Physical and Psychological Stress in Rats Enhances Colonic Epithelial Permeability via Peripheral CRH

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Abstract

Stress may be a contributing factor in intestinal inflammatory disease; however, the underlying mechanisms have not been elucidated. We previously reported that acute stress altered jejunal epithelial physiology. In this study, we examined both physical and psychological stress-induced functional changes in colonic mucosa. Colonic mucosal tissue from rats subjected to either 2 hr of cold-restraint stress or 1 hr of water-avoidance stress demonstrated altered ionic transport as well as significantly elevated baseline conductance (ionic permeability) and flux of horseradish peroxidase (macromolecular permeability). Intraperitoneal pretreatment with the corticotropin-releasing hormone (CRH) antagonist, α helical CRH9–41, inhibited the stress-induced abnormalities, while exogenous intraperitoneal administration of CRH, to control rats, mimicked the stress responses and in vitro CRH increased the macromolecular permeability. These results suggest that peripheral CRH mediates stress-induced colonic pathophysiology. We speculate that a stress-induced barrier defect may allow uptake of immunogenic substances into the colonic mucosa, initiating or exacerbating intestinal inflammation.

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Saunders, P.R., Santos, J., Hanssen, N.P. et al. Physical and Psychological Stress in Rats Enhances Colonic Epithelial Permeability via Peripheral CRH. Dig Dis Sci 47, 208–215 (2002). https://doi.org/10.1023/A:1013204612762

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  • DOI: https://doi.org/10.1023/A:1013204612762

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