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Updated: Jun 4, 2026
06:57
Development of an Antigen-driven Colitis Model to Study Presentation of Antigens by Antigen Presenting Cells to T Cells
Published on: September 18, 2016
Serotonin activates dendritic cell function in the context of gut inflammation
Nan Li1, Jean-Eric Ghia, Huaqing Wang
1Farncombe Family Digestive Health Research Institute, Department of Pathology, McMaster University, Hamilton, Ontario, Canada.
The American Journal of Pathology
|February 2, 2011
Summary
Serotonin influences gut inflammation by affecting immune cells. Reduced gut serotonin in TPH1(-/-) mice lessened colitis severity, while adding serotonin worsened it, highlighting serotonin
Area of Science:
- Immunology
- Gastroenterology
- Neuroscience
Background:
- Gut mucosal inflammation involves immune cell infiltration and altered serotonin-producing cells.
- Serotonin's role in immune cell function and gut inflammation requires further investigation.
Purpose of the Study:
- To investigate the role of serotonin in dendritic cell (DC) function and T-cell activation in gut inflammation.
- To explore serotonin's impact on innate and adaptive immune responses in the context of colitis.
Main Methods:
- Compared DCs from wild-type and TPH1(-/-) mice (lacking gut serotonin) with and without DSS-induced colitis.
- Assessed IL-12 production by DCs and T-cell priming capacity in vitro.
- Investigated the effect of serotonin-pulsed DC transfer on colitis severity in TPH1(-/-) mice.
Main Results:
- DCs from TPH1(-/-) mice produced less IL-12, correlating with reduced colitis severity.
- In vitro serotonin stimulation restored cytokine production in TPH1(-/-) DCs.
- Adoptive transfer of serotonin-pulsed DCs exacerbated DSS-induced colitis in TPH1(-/-) mice.
- T-cells primed by TPH1(-/-) DCs showed reduced IL-17 and interferon-γ production.
Conclusions:
- Serotonin signaling critically influences DC function and T-cell activation in gut inflammation.
- Serotonin promotes interactions between innate and adaptive immunity, exacerbating gut inflammation.
- Findings suggest novel therapeutic strategies targeting serotonin pathways for inflammatory bowel diseases.
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