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DICAM Attenuates Experimental Colitis via Stabilizing Junctional Complex in Mucosal Barrier
Seung-Woo Han1, Jeong Min Kim2, Yunmee Lho3
1Division of Rheumatology, Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea.
Dual immunoglobulin domain-containing adhesion molecule (DICAM) expression increases during colitis and protects the intestinal barrier. Loss of DICAM worsens colitis, while its overexpression maintains barrier integrity, highlighting its protective role.
Area of Science:
- Gastroenterology
- Immunology
- Cell Biology
Background:
- Intestinal barrier function is vital for preventing inflammation.
- Dual immunoglobulin domain-containing adhesion molecule (DICAM) mediates cell-cell adhesion.
- DICAM's role in colonic inflammation is not well understood.
Purpose of the Study:
- To investigate the role of DICAM in experimental colitis.
- To determine if altered DICAM expression affects colitis severity.
Main Methods:
- Dextran sulfate sodium (DSS)-induced colitis model in mice.
- Utilized DICAM-deficient mice and DICAM-overexpressing Caco-2 cells.
- Assessed inflammation, barrier integrity markers (ZO-1, occludin), and transepithelial electrical resistance.
Main Results:
- DICAM expression increased with colitis severity and decreased upon resolution.
- DICAM knockout mice exhibited more severe colitis.
- DICAM overexpression in Caco-2 cells preserved barrier function and attenuated inflammation-induced damage.
Conclusions:
- DICAM plays a protective role in experimental colitis.
- Increased DICAM stabilizes the intestinal mucosal barrier's junctional complex integrity.
- DICAM is a potential therapeutic target for inflammatory bowel diseases.
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