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Glioplasticity in irritable bowel syndrome.
Glioplasticity in irritable bowel syndrome.
- Source :
-
Neurogastroenterology and motility [Neurogastroenterol Motil] 2018 Apr; Vol. 30 (4), pp. e13232. Date of Electronic Publication: 2017 Oct 13. - Publication Year :
- 2018
-
Abstract
- Background: Growing evidence indicates a wide array of cellular remodeling in the mucosal microenvironment during irritable bowel syndrome (IBS), which possibly contributes to pathophysiology and symptom generation. Here, we investigated whether enteric glial cells (EGC) may be altered, and which factors/mechanisms lead to these changes.<br />Methods: Colonic mucosal biopsies of IBS patients (13 IBS-Constipation [IBS-C]; 10 IBS-Diarrhea [IBS-D]; 11 IBS-Mixed [IBS-M]) and 24 healthy controls (HC) were analyzed. Expression of S100β and GFAP was measured. Cultured rat EGC were incubated with supernatants from mucosal biopsies, then proliferation and Ca <superscript>2+</superscript> response to ATP were analyzed using flow cytometry and Ca <superscript>2+</superscript> imaging. Histamine and histamine 1-receptor (H1R) involvement in the effects of supernatant upon EGC was analyzed.<br />Key Results: Compared to HC, the mucosal area immunoreactive for S100β was significantly reduced in biopsies of IBS patients, independently of the IBS subtype. IBS-C supernatants reduced EGC proliferation and IBS-D and IBS-M supernatants reduced Ca <superscript>2+</superscript> response to ATP in EGC. EGC expressed H1R and the effects of supernatant upon Ca <superscript>2+</superscript> response to ATP in EGC were blocked by pyrilamine and reproduced by histamine via H1R. IBS supernatants reduced mRNA expression of connexin-43. The S100β-stained area was negatively correlated with the frequency and intensity of pain and bloating.<br />Conclusion and Inferences: Changes in EGC occur in IBS, involving mucosal soluble factors. Histamine, via activation of H1R-dependent pathways, partly mediates altered Ca <superscript>2+</superscript> response to ATP in EGC. These changes may contribute to the pathophysiology and the perception of pain and bloating in patients with IBS.<br /> (© 2017 John Wiley & Sons Ltd.)
- Subjects :
- Adenosine Triphosphate administration & dosage
Adult
Animals
Calcium metabolism
Cells, Cultured
Colon innervation
Female
Humans
Intestinal Mucosa metabolism
Male
Middle Aged
Neuroglia drug effects
Rats
S100 Calcium Binding Protein beta Subunit metabolism
Colon metabolism
Enteric Nervous System metabolism
Irritable Bowel Syndrome metabolism
Neuroglia metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1365-2982
- Volume :
- 30
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Neurogastroenterology and motility
- Publication Type :
- Academic Journal
- Accession number :
- 29027719
- Full Text :
- https://doi.org/10.1111/nmo.13232