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Updated: Jun 25, 2026

Investigating Intestinal Inflammation in DSS-induced Model of IBD
Published on: February 1, 2012
Sam68 contributes to intestinal inflammation in experimental and human colitis
Wendy A Goodman1, Shrikanth C Basavarajappa1, Angela R Liu1
1Department of Pathology, School of Medicine, Case Western Reserve University and University Hospitals Cleveland Medical Center, 2103 Cornell Road, Room 6526, Wolstein Research Building, Cleveland, OH, 44106, USA.
Deleting Sam68 protein protects against experimental colitis by reducing tumor necrosis factor (TNF)-associated inflammation. Sam68 is upregulated in ulcerative colitis (UC) patients, suggesting it as a therapeutic target.
Area of Science:
- Molecular Biology
- Immunology
- Gastroenterology
Background:
- Sam68 is an RNA-binding protein involved in signal transduction.
- Sam68 has proinflammatory and apoptotic functions, implicated in TNF/TNFR1 and TLR pathways.
- Elevated Sam68 levels are observed in inflamed tissues of rheumatoid arthritis and ulcerative colitis (UC) patients.
Purpose of the Study:
- To investigate the protective role of Sam68 deletion against experimental colitis in vivo.
- To determine the contribution of Sam68 to TNF-induced inflammatory gene expression.
- To analyze Sam68 and inflammatory gene expression in UC patient colon tissues.
Main Methods:
- Utilized Sam68 knockout (KO) mice for experimental colitis studies.
- Employed three-dimensional intestinal organoid cultures to assess TNF-induced gene expression.
- Examined colon tissues from UC patients and DSS-treated mice.
Main Results:
- Sam68 KO mice showed reduced weight loss and inflammation in DSS-induced colitis.
- Non-hematopoietic Sam68, not hematopoietic, drives intestinal inflammation.
- Sam68 deficiency decreased proinflammatory gene expression in mouse models and organoids.
- UC patient tissues exhibited upregulated inflammatory genes and Sam68 protein.
Conclusions:
- Sam68 acts as a significant inflammatory driver in response to intestinal epithelial damage.
- Targeting Sam68 may offer a potential therapeutic strategy for UC patients.
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