Cited by 32Gastrointestinal motility and disordersNeuropeptides and Animal PhysiologyStress Responses and Cortisol

Adaptation of stress-induced mucosal pathophysiology in rat colon involves opioid pathways

Yates, Derrick A., Santos, Javier, Söderholm, Johan D., Perdue, Mary H.·2001·American Journal of Physiology-Gastrointestinal and Liver Physiology

Abstract

Acute stress increases ion secretion and permeability of rat colonic epithelium. However, it is not known if stress-induced mucosal changes are subject to adaptation. Wistar-Kyoto rats were exposed to either continuous water-avoidance stress (CS) for 60 min or intermittent stress (IS) for three 20-min periods. Distal colonic segments were mounted in Ussing Chambers, and ion-transport [short-circuit current ( I sc)] and permeability [conductance and flux of horseradish peroxidase (HRP)] parameters were measured. CS significantly increased I sc, conductance, and HRP flux compared with control values. In contrast, in IS rats these variables were similar to those in nonstressed controls. To study the pathways involved in IS-induced adaptation, rats were pretreated intraperitoneally with the opioid antagonists naloxone or methylnaloxone. Opioid antagonists had no effect on values in control or CS rats. However, in the IS group, naloxone and methylnaloxone reversed the adaptive responses, and all variables increased to CS values. We conclude that stress-induced colonic mucosal pathophysiology is subject to rapid adaptation, which involves opioid pathways.

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Crossref · 10.1152/ajpgi.2001.281.1.g124

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  • Stressful stimuli can enhance the permeability of the intestinal epithelium, which allows bacterial antigens to penetrate the gut epithelium and triggers an immune response in the intestinal mucosa.

    “For example, several studies have demonstrated that stressful stimuli can enhance the permeability of the intestinal epithelium, which allows bacterial antigens to penetrate the gut epithelium and triggers an immune response in the intestinal mucosa.23-27”

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Authors
Yates, D. A., Santos, J., Söderholm, J. D., & Perdue, M. H.
Affiliations
McMaster University (CA)
Venue
American Journal of Physiology-Gastrointestinal and Liver Physiology
Published
2001-07-01
Volume
281
Issue
1
Pages
G124-G128
ISSN
  • 0193-1857 (ISSN-L)
  • 1522-1547
OpenAlex
W1870487270
Cited by
32
References
35
Citations by year
2022: 2 · 2019: 1 · 2018: 1 · 2015: 2 · 2014: 3 · 2012: 4
FWCI
1.90
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Gastrointestinal and Liver Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
acute stress, colonic mucosa, stress adaptation, opioid pathway, naloxone, ion secretion, epithelial permeability, short-circuit current, water avoidance stress, colonic epithelium
MeSH terms
Adaptation, Physiological, Analgesics, Opioid, Animals, Colon, Feces, Gastrointestinal Motility, Intestinal Absorption, Intestinal Mucosa, Male, Naloxone, Narcotic Antagonists, Oxymorphone, Rats, Inbred WKY, Stress, Physiological, Opioid Peptides, Rats, In Vitro Techniques

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