Acute stress disrupts intestinal homeostasis via GDNF-RET.

Abstract:

OBJECTIVES:Enterochromaffin (EC) cells have been associated with functional gastrointestinal disorders such as IBS. Recently, we found that glial cell-derived neurotrophic factor (GDNF)-rearranged during transfection (RET) localized in EC cells in human colonic epithelia. Here, we examine the role of GDNF-RET in the pathophysiology of diarrhoea-predominant irritable bowel syndrome (IBS-D). MATERIALS AND METHODS:GDNF was assessed by ELISA and immunohistochemistry in biopsies from IBS-D patients and healthy controls. Stress was induced by using a wrap-restraint stress (WRS) procedure to serve as an acute stress-induced IBS model. The function of GDNF-RET axis to intestinal stem cell (ISC) homeostasis, and EC cell numbers were assessed in vivo and in vitro. RESULTS:GDNF-RET was expressed in EC cells in human colon. GDNF was significantly increased in IBS-D patients. WRS mice showed increased GDNF-RET levels in colon. WRS induced visceral hypersensitivity by expanding of ISC and differentiation of EC cell via GDNF-RET. Furthermore, GDNF-treated mice recapitulated the phenotype of WRS mice. In vitro, GDNF treatment amplified Wnt signal and increased serotonin levels in colonic organoids in a dose-dependent manner. CONCLUSIONS:We identified GDNF-RET was presented in colonic epithelium of patients with IBS-D. GDNF-RET played important roles in regulating ISC and EC cell differentiation. Our findings, thus, provide RET inhibitor as new therapeutic targets for treatment of patients with IBS-D.

journal_name

Cell Prolif

journal_title

Cell proliferation

authors

Lin L,Feng B,Zhou R,Liu Y,Li L,Wang K,Yu Y,Liu C,Long X,Gu X,Li B,Wang X,Yang X,Cong Y,Zuo X,Li Y

doi

10.1111/cpr.12889

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

e12889

issue

10

eissn

0960-7722

issn

1365-2184

journal_volume

53

pub_type

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