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J Korean Surg Soc. 2010 Nov;79(5):317-325. English. Original Article.
Cho YB , Kim MS , Kang MJ , Shin HJ , Kim SH , Kim HC , Yun SH , Lee WY , Chun HK .
Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
Department of Surgery, University of Melbourne, Victoria, Australia.
Center for Clinical Research, Samsung Biomedical Research Institute, Seoul, Korea.
Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

PURPOSE: Mesenchymal stem cells (MSCs) are surfacing as a new method of treatment for various diseases that have poor outcome with drug treatments. In this study, we investigated the effects of MSCs in a murine intestinal inflammation model mimicking human Crohn's disease (CD) using 2,4,5-trinitrobenzene sulfonic acid (TNBS). METHODS: Colitis was induced by rectal administration of 2 mg of TNBS in 35% ethanol as experimental group compared to control group. Histological changes, surface molecules of T and B cells of the spleen and blood, and cytokine production (IFN-gamma, TNF-alpha, IL-4, IL-6, IL-10, and IL-12) were determined among 3 groups comprised of control group, TNBS group and TNBS/MSC group. RESULTS: In the mice treated with MSCs, there was a decrease in the wasting disease process and inflammatory histopathological changes. There was also a decrease in pro-inflammatory T-helper 1 (Th1) cytokines IFN-gamma and IL-12 and T-helper 2 (Th2) cytokine IL-4. Anti-inflammatory cytokine IL-10 increased in mice treated with MSCs compared to colitic mice. The blood CD4+CD25+ T-regulatory cells also increased and splenic CD19 B-cells decreased. CONCLUSION: The results of this study suggest that MSCs may have a therapeutic effect in controlling the Th1 and Th2 mediated immune response in patients with CD and aid in tissue regeneration.

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