Cited by 46Vagus Nerve Stimulation ResearchGastrointestinal motility and disordersRegulation of Appetite and Obesity

Withdrawal and restoration of central vagal afferents within the dorsal vagal complex following subdiaphragmatic vagotomy

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Peters, James H., Gallaher, Zachary R., Ryu, Vitaly, Czaja, Krzysztof·2013·Journal of Comparative Neurology

Abstract

Vagotomy, a severing of the peripheral axons of the vagus nerve, has been extensively utilized to determine the role of vagal afferents in viscerosensory signaling. Vagotomy is also an unavoidable component of some bariatric surgeries. Although it is known that peripheral axons of the vagus nerve degenerate and then regenerate to a limited extent following vagotomy, very little is known about the response of central vagal afferents in the dorsal vagal complex to this type of damage. We tested the hypothesis that vagotomy results in the transient withdrawal of central vagal afferent terminals from their primary central target, the nucleus of the solitary tract (NTS). Sprague–Dawley rats underwent bilateral subdiaphragmatic vagotomy and were sacrificed 10, 30, or 60 days later. Plastic changes in vagal afferent fibers and synapses were investigated at the morphological and functional levels by using a combination of an anterograde tracer, synapse‐specific markers, and patch‐clamp electrophysiology in horizontal brain sections. Morphological data revealed that numbers of vagal afferent fibers and synapses in the NTS were significantly reduced 10 days following vagotomy and were restored to control levels by 30 days and 60 days, respectively. Electrophysiology revealed transient decreases in spontaneous glutamate release, glutamate release probability, and the number of primary afferent inputs. Our results demonstrate that subdiaphragmatic vagotomy triggers transient withdrawal and remodeling of central vagal afferent terminals in the NTS. The observed vagotomy‐induced plasticity within this key feeding center of the brain may be partially responsible for the response of bariatric patients following gastric bypass surgery. J. Comp. Neurol. 521:3584‐3599, 2013. © 2013 Wiley Periodicals, Inc.

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Authors
Peters, J. H., Gallaher, Z. R., Ryu, V., & Czaja, K.
Affiliations
  • Washington State University (US)
  • Georgia State University (US)
Corresponding author
  • Peters, James H.
  • Czaja, Krzysztof
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2013-08-23
Volume
521
Issue
15
Pages
3584-3599
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W1765129194
Cited by
46
References
67
Citations by year
2025: 3 · 2024: 3 · 2023: 3 · 2021: 8 · 2020: 4 · 2019: 2 · 2018: 9 · 2017: 3 · 2016: 3 · 2015: 3 · 2014: 4 · 2012: 1
FWCI
1.87
Type
journal article
Language
en
Open access
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK092651)
Topics
  • Life Sciences › Neuroscience › Neurology › Vagus Nerve Stimulation Research
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
vagotomy, dorsal vagal complex, nucleus tractus solitarius, subdiaphragmatic vagotomy, glutamate release, synaptic plasticity, bariatric surgery, gastric bypass, feeding center
MeSH terms
Animals, Axons, Biotin, Dextrans, Diaphragm, Fluorescent Dyes, Image Processing, Computer-Assisted, Immunohistochemistry, Male, Nerve Regeneration, Neurons, Afferent, Synapses, Tubulin, Vagotomy, Vagus Nerve, Synapsins, Tissue Fixation, Synaptophysin, Rats, Sprague-Dawley, Solitary Nucleus, Patch-Clamp Techniques, Rats, Electrophysiological Phenomena

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