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Updated: May 20, 2026

In Vitro Recording of Mesenteric Afferent Nerve Activity in Mouse Jejunal and Colonic Segments
Published on: October 25, 2016
Sensory neuro-immune interactions differ between irritable bowel syndrome subtypes
Patrick A Hughes1, Andrea M Harrington, Joel Castro
1Nerve-Gut Research Laboratory, Discipline of Medicine, Faculty of Health Sciences, The University of Adelaide and Department of Gastroenterology and Hepatology, Royal Adelaide Hospital, Adelaide, South Australia, Australia 5000.
Irritable bowel syndrome (IBS) involves immune dysfunction that differs between diarrhea-predominant IBS (D-IBS) and constipation-predominant IBS (C-IBS) patients, impacting sensory nerves differently. Targeting specific immune pathways may benefit distinct IBS subgroups.
Area of Science:
- Gastroenterology
- Immunology
- Neuroscience
Background:
- The gut hosts interactions between immune and sensory systems.
- Immune dysfunction is implicated in irritable bowel syndrome (IBS).
Purpose of the Study:
- To differentiate immune dysfunction patterns in IBS subgroups.
- To elucidate immune cell communication with sensory nerves in IBS.
Main Methods:
- Assessed mechanosensitivity of mouse colonic sensory nerves exposed to supernatants from IBS patients and healthy controls.
- Analyzed cytokine/chemokine profiles and correlated them with patient symptoms.
- Evaluated cytokine receptor expression on colonic sensory neurons and tested cytokine effects on afferents.
Main Results:
- Diarrhea-predominant IBS (D-IBS) supernatants induced hypersensitivity in colonic afferents, unlike constipation-predominant IBS (C-IBS) supernatants.
- Healthy subject supernatants inhibited mechanosensitivity via an opioidergic mechanism.
- Elevated cytokines in IBS supernatants correlated with pain; TNF-α and IL-1β significantly affected afferent activity via TRPA1 and sodium channels, respectively.
Conclusions:
- Distinct immune dysfunction and sensory pathway interactions characterize IBS subgroups.
- Targeting specific immune system components offers potential therapeutic strategies for IBS patients.
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