Cited by 30Gastrointestinal motility and disordersVagus Nerve Stimulation ResearchNeuropeptides and Animal Physiology

Electrophysiological evidence for distinct vagal pathways mediating CCK‐evoked motor effects in the proximal versus distal stomach

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Okano‐Matsumoto, Shiho, McRoberts, James A., Taché, Yvette, Adelson, David W.·2011·The Journal of Physiology

Abstract

Intravenous cholecystokinin octapeptide (CCK-8) elicits vago-vagal reflexes that inhibit phasic gastric contractions and reduce gastric tone in urethane-anaesthetized rats. A discrete proximal subdivision of the ventral gastric vagus nerve (pVGV) innervates the proximal stomach, but the fibre populations within it have not been characterized previously.We hypothesized that I.V. CCK-8 injection would excite inhibitory efferent outflow in the pVGV, in contrast to its inhibitory effect on excitatory efferent outflow in the distal subdivision (dVGV), which supplies the distal stomach. In each VGV subdivision, a dual-recording technique was used to record afferent and efferent activity simultaneously, while also monitoring intragastric pressure (IGP). CCK-8 dose dependently (100-1000 pmol kg(-1), I.V.) reduced gastric tone, gastric contractile activity and multi-unit dVGV efferent discharge, but increased pVGV efferent firing. Single-unit analysis revealed a minority of efferent fibres in each branch whose response differed in direction from the bulk response. Unexpectedly, efferent excitation in the pVGV was significantly shorter lived and had a significantly shorter decay half-time than did efferent inhibition in the dVGV, indicating that distinct pathways drive CCK-evoked outflow to the proximal vs. the distal stomach. Efferent inhibition in the dVGV began several seconds before, and persisted significantly longer than, simultaneously recorded dVGV afferent excitation.Thus, dVGV afferent excitation could not account for the pattern of dVGV efferent inhibition. However, the time course of dVGV afferent excitation paralleled that of pVGV efferent excitation. Similarly, the duration of CCK-8-evoked afferent responses recorded in the accessory celiac branch of the vagus (ACV) matched the duration of dVGV efferent responses. The observed temporal relationships suggest that postprandial effects on gastric complicance of CCK released from intestinal endocrine cells may require circulating concentrations to rise to levels capable of exciting distal gastric afferent fibres, in contrast to more immediate effects on distal gastric contractile activity mediated via vago-vagal reflexes initiated by paracrine excitation of intestinal afferents.

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Crossref · 10.1113/jphysiol.2010.196832

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  • Gut peptides in the systemic circulation can bind cognate receptors on immune cells and vagus nerve terminals, thereby enabling indirect gut-brain communication.

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Authors
Okano‐Matsumoto, S., McRoberts, J. A., Taché, Y., & Adelson, D. W.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Adelson, David W.
Venue
The Journal of Physiology
Publisher
Wiley
Published
2011-01-14
Volume
589
Issue
2
Pages
371-393
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W1517423134
Cited by
30
References
104
Citations by year
2026: 1 · 2025: 1 · 2022: 1 · 2021: 5 · 2020: 2 · 2019: 4 · 2018: 1 · 2017: 1 · 2016: 3 · 2015: 3 · 2014: 1 · 2013: 3 · 2012: 1
FWCI
2.31
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (DK 41301, R21DK074736, P30DK041301)
Topics
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Neuroscience › Neurology › Vagus Nerve Stimulation Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
CCK-8, vago-vagal reflex, gastric motility, gastric tone, gastric contractility, efferent inhibition, intragastric pressure
MeSH terms
Analysis of Variance, Animals, Dose-Response Relationship, Drug, Electrophysiology, Male, Neurons, Efferent, Sincalide, Stomach, Vagus Nerve, Rats, Sprague-Dawley, Rats

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