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Author Spotlight: Studying the Epithelial Effects of Intestinal Inflammation In Vitro on Established Murine Colonoids
Published on: June 2, 2023
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Fibroblasts modulate intestinal secretory responses to inflammatory mediators
1Department of Anatomy, College of Veterinary Medicine, North Carolina State University, Raleigh 27606.
The Journal of Clinical Investigation
|February 1, 1992
Summary
Intestinal fibroblasts amplify inflammatory responses by releasing prostaglandin E2, enhancing the secretory activity of colonic epithelial cells. This highlights a key mesenchymal-epithelial interaction in amplifying inflammation.
Area of Science:
- Gastroenterology
- Cell Biology
- Immunology
Background:
- Intestinal epithelial cells mediate secretion and barrier function.
- Fibroblasts form a significant component of the intestinal submucosa.
- Mesenchymal-epithelial interactions are crucial for gut homeostasis.
Purpose of the Study:
- To investigate the role of fibroblasts in regulating colonic epithelial cell secretion.
- To elucidate the mechanisms underlying fibroblast-epithelial cell communication in the intestine.
Main Methods:
- Co-culturing T84 colonic epithelial cells with fibroblasts.
- Measuring short-circuit current in Ussing chambers to assess secretory responses.
- Analyzing prostaglandin E2 release from fibroblasts.
Main Results:
- Fibroblasts enhanced secretory responses of T84 cells to inflammatory mediators (bradykinin, serotonin, H2O2, histamine).
- This enhancement was abolished by indomethacin, an inhibitor of cyclooxygenase.
- Fibroblasts released prostaglandin E2 in response to inflammatory mediators.
Conclusions:
- Fibroblasts exert paracrine regulation on intestinal epithelial cells via prostaglandin E2.
- Fibroblasts amplify inflammatory responses through mesenchymal-epithelial interactions.
- The intestinal fibroblastic sheath plays a role in modulating the inflammatory response.
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