ArticleThe Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology2022
Subepithelial Serotonin Reduces Small Intestinal Epithelial Cell Tightness via Reduction of Occluding Expression.
Article in The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 5 citations in OpenAlex.
- Valproic Acid-Induced Autistic-Like Behavior Is Accompanied by Intestinal Damage Driving Changes in Gut Permeability in a Sex-Dependent Way in Rats.Journal of neurochemistry · 2025Article
- The Role of Ion Channels in Functional Gastrointestinal Disorders (FGID): Evidence of Channelopathies and Potential Avenues for Future Research and Therapeutic Targets.International journal of molecular sciences · 2023Review
- Administration ofBioscience of microbiota, food and health · 2023Article
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Authors and funding
13 authors at 3 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundThe precise pathogenesis of irritable bowel syndrome (IBS) remains unresolved; however, recent studies have reported that patients with diarrhea-predominant IBS exhibit an increased small intestinal permeability and increased number of enterochromaffin cells containing high 5-hydroxytryptamine (5HT; serotonin) levels. In this study, we investigated whether 5HT has the potential to modulate small intestinal epithelial cell permeability, focusing on tight junction-associated proteins.
methodsThe differentiated Caco-2 cell monolayer on porous filters (Millicell) was used. Then, 5HT was added to the lower Millicell compartment for 7 days. Intestinal epithelial cell permeability was assessed by measuring the flux of paracellular permeability markers. We further assessed the expression of occludin in the 5HT-stimulated Caco-2 monolayer.
resultsWe found that 5HT did not affect the viability of Caco-2 cells at concentrations up to 100 µM during the experimental period. Administration of 5HT to the basal side of Caco-2 cells increased the flux of 3H-labeled mannitol (182 Da) but did not increase that of FITC-dextran (4000 Da). Among the tight junction proteins, the expression of occludin was specifically decreased by stimulation with 5HT at a concentration of 100 µM.
conclusionIn conclusion, excessive 5HT in the basal side increased the permeability of intestinal epithelial cells via reduction of occludin expression.
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