Cited by 11Gastrointestinal motility and disordersNeuropeptides and Animal PhysiologyCongenital gastrointestinal and neural anomalies

The role of substance P in the maintenance of colonic hypermotility induced by repeated stress in rats

Lu, Ping, Luo, Hesheng, Quan, Xiaojing, Fan, Han, Tang, Qincai, Yu, Guang, Chen, Wei, Xia, Hong·2016·Neuropeptides

Abstract

Background The mechanism underlying chronic stress-induced gastrointestinal (GI) dysmotility has not been fully elucidated and GI hormones have been indicated playing a role in mediating stress-induced changes in GI motor function.Aims Our objective was to study the possible role of substance P (SP) in the colonic hypermotility induced by repeated water avoidance stress (WAS) which mimics irritable bowel syndrome.Methods Male Wistar rats were submitted to WAS or sham WAS (SWAS) (1h/day) for up to 10 consecutive days. Enzyme Immunoassay Kit was used to detect the serum level of SP. The expression of neurokinin-1 receptor (NK1R) was investigated by Immunohistochemistry and Western blotting. The spontaneous contraction of muscle strip was studied in an organ bath system. L-type calcium channel currents (ICa,L) of smooth muscle cells (SMCs) were recorded by whole-cell patch-clamp technique.Results Fecal pellet expulsion and spontaneous contraction of proximal colon in rats were increased after repeated WAS. The serum level of SP was elevated following WAS. Immunohistochemistry proved the expression of NK1R in mucosa, muscularis and myenteric plexus. Western blotting demonstrated stress-induced up-regulation of NK1R in colon devoid of mucosa and submucosa. Repeated WAS increased the contractile activities of longitudinal muscle and circular muscle strips induced by SP and this effect was reversed by a selective NK1R antagonist. The ICa,L of SMCs in the WAS rats were drastically increased compared to controls after addition of SP.Conclusions Increased serum SP level and up-regulated NK1R in colon may contribute to stress-induced colonic hypermotility. And L-type calcium channels play a potentially important role in the process of WAS-induced dysmotility.

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Crossref · 10.1016/j.npep.2016.01.006

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  • Increased local production of estrogen and proinflammatory cytokines may induce NK1R in myometrium, causing uterine hyperactivity and subsequently pain.

    “This may suggest that increased local production of estrogen and proinflammatory cytokines may induce NK1R in myometrium, causing uterine hyperactivity and, subsequently, pain, as in colon72,73.”
  • NK1R antagonism reduces anxiety and emotional arousal circuit response to noxious visceral distension in women with irritable bowel syndrome.

    “Moreover, NK1R antagonism has been shown to reduce anxiety and emotional arousal circuit response to noxious visceral distension in women with irritable bowel syndrome107, which is likely attributable, at least in part, to increased colonic hypermotility induced by SP and NK1R activation72,73.”
  • Water avoidance stress (WAS)-induced colonic hypermotility is probably dependent on the upregulation of the neurokinin-1 receptor (NK1R) in the colon and increased serum SP levels, suggesting a potential mechanism for diarrhea in IBD patients with anxiety or depression.

    “Another study revealed that water avoidance stress (WAS)-induced colonic hypermotility is probably dependent on the upregulation of the neurokinin-1 receptor (NK1R) in the colon and increased serum SP levels, suggesting a potential mechanism for diarrhea in IBD patients with anxiety or depression (41).”

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Authors
Lu, P., Luo, H., Quan, X., Fan, H., Tang, Q., Yu, G., Chen, W., & Xia, H.
Affiliations
Renmin Hospital of Wuhan University (CN)
Corresponding author
Luo, Hesheng
Venue
Neuropeptides
Publisher
Elsevier BV
Published
2016-04
Volume
56
Pages
75-82
ISSN
0143-4179 (ISSN-L)
OpenAlex
W2268600191
Cited by
11
References
40
Citations by year
2024: 1 · 2023: 3 · 2022: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 1
FWCI
1.81
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropeptides (publishedVersion)
  • PubMed (publishedVersion)
Funders
Natural Science Foundation of Hubei Province (2013CFA128)
Topics
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Surgery › Congenital gastrointestinal and neural anomalies
Keywords
substance P, chronic stress, water avoidance stress, irritable bowel syndrome, neurokinin-1 receptor, L-type calcium channels, smooth muscle contraction, gastrointestinal motility disorders, NK1 receptor antagonists, myenteric plexus
MeSH terms
Animals, Colon, Gastrointestinal Motility, Male, Muscle, Smooth, Myenteric Plexus, Stress, Psychological, Substance P, Rats, Wistar, Receptors, Neurokinin-1, Receptors, Neurokinin-2, Calcium Channels, L-Type, Rats

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