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Expression of Neurotrophic Factors, Tight Junction Proteins, and Cytokines According to Irritable Bowel Syndrome Subtype and Sex

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Affiliated Author(s)
이주엽
Alternative Author(s)
Lee, Ju Yup
Journal Title
Journal of neurogastroenterology and motility
ISSN
2093-0887
Issued Date
2020
Keyword
CytokinesIrritable bowel syndromeSexSubtypeTight junctions
Abstract
Background/Aims:
Emerging evidence shows that the mechanism of irritable bowel syndrome (IBS) is associated with neurotrophic factors and tight junction proteins (TJPs) It is known that there are sex differences in the pathophysiology of IBS. The aim of the present study is to determine expression levels of neurotrophic factors, TJPs, and cytokines according to IBS subtype and sex.

Methods:
From 59 IBS (33 IBS-constipation, 21 IBS-diarrhea, and 5 IBS-mixed) and 36 control patients, colonic mucosa mRNA expression levels of transient receptor potential vanilloid-1 (TRPV1), nerve growth factor (NGF), glial cell-derived neurotrophic factor (GDNF), and various TJPs were assessed by real-time polymerase chain reaction. Western blot was performed to determine levels of zonular occludens-1 (ZO-1). Serum levels of cytokines were measured by enzyme-linked immunosorbent assay.

Results:
TRPV1, GDNF, and NGF mRNA levels were significantly increased in those with IBS-constipation compared to those in controls (all P < 0.05). However, they showed no significant difference between those with IBS-diarrhea and controls. Expression level of TRPV1 correlated with that of GDNF (r = 0.741, P < 0.001) and NGF (r = 0.935, P < 0.001). ZO-1 RNA expression levels were lower (P = 0.021) in female IBS-diarrhea than those in controls, although they showed no significant differences between male IBS-diarrhea and controls. Serum IL-1β levels in female IBS were significantly higher than those of male IBS, especially in IBS-constipation (P < 0.001).

Conclusion:
Our results suggest that neurotrophic factors and IL-1β are closely related to IBS-constipation and that decrease of ZO-1 is an important factor in female with IBS-diarrhea.
Department
Dept. of Internal Medicine (내과학)
Publisher
School of Medicine (의과대학)
Citation
Ju Yup Lee et al. (2020). Expression of Neurotrophic Factors, Tight Junction Proteins, and Cytokines According to Irritable Bowel Syndrome Subtype and Sex. Journal of neurogastroenterology and motility, 26(1), 106–116. doi: 10.5056/jnm19099
Type
Article
ISSN
2093-0887
DOI
10.5056/jnm19099
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/42373
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Internal Medicine (내과학)
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