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Updated: Jul 10, 2026
06:55
Ileectomy-induced Bile Overaccumulation in Mouse Intestine
Published on: August 21, 2017
Bile salt stimulates intestinal epithelial cell migration through TGFbeta after wounding
E D Strauch1, J Y Wang, B L Bass
1Department of Surgery, University of Maryland, Baltimore, Maryland 21201, USA.
The Journal of Surgical Research
|April 26, 2001
Summary
Bile acids, like taurodeoxycholic acid (TDCA), enhance intestinal epithelial cell migration for mucosal repair. This process relies on TGFbeta signaling and does not involve increased cell division.
Area of Science:
- Gastroenterology
- Cell Biology
- Wound Healing Research
Background:
- Bile salts influence gastrointestinal epithelial functions beyond fat digestion.
- Bile acids are hypothesized to play a role in intestinal mucosal repair (restitution).
Purpose of the Study:
- To investigate the effect of taurodeoxycholic acid (TDCA) on intestinal epithelial cell migration.
- To identify the role of TGFbeta in bile acid-modulated intestinal repair.
Main Methods:
- Utilized a model of epithelial restitution using IEC-6 cells.
- Measured cell migration after wounding and treatment with TDCA.
- Assessed TGFbeta expression and proliferation, and blocked TGFbeta function with antibodies.
Main Results:
- Physiologic concentrations of TDCA augmented epithelial cell migration.
- TDCA inhibited cell proliferation at effective concentrations.
- Increased TGFbeta expression was observed in response to TDCA, and blocking TGFbeta abolished the migratory effect.
Conclusions:
- Bile acids enhance small intestinal epithelial cell migration at physiological concentrations.
- This migratory process is dependent on TGFbeta signaling.
- Bile acids and TGFbeta are crucial for differentiated intestinal cell function and maintaining mucosal integrity.
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