Gastro-intestinal autoimmunity: preclinical experiences and successful therapy of fistulizing bowel diseases and gut Graft versus host disease by mesenchymal stromal cells.

Several human studies show positive signals, while research methods and sample sizes continue to develop.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Mesenchymal stromal cells (MSC) are multipotent adult stem cells with the potential to regenerate tissue damage and inhibit inflammation and fibrosis in parallel. As they are non-immunogenic, MSC can be safely auto- and allotransplanted and consequently represent a therapeutic option for refractory connective tissue diseases and fistulizing colitis like Crohn's disease. Actually, there are more than 200 registered clinical trial sites for evaluating MSC therapy, 22 are on autoimmune diseases and 27 are actually recruiting bowel disease' patients. More than 1,500 patients with bowel diseases like Crohn's disease were treated in clinical trials by local as well as systemic MSC therapy. Phase I and II trials on fistula documented the feasibility and safety of MSC therapy, and a significant superiority compared to fibrin glue in fistulizing bowel diseases was demonstrated. Autologous as well as allogeneic use of Bone marrow as well as of adipose tissue-derived MSC are feasible. In refractory Graft versus host disease, especially in refractory gut Graft versus host diseases, encouraging results were reported using MSC. Systemic MSC therapy of refractory irradiation-induced colitis was safe and effective on pain, diarrhea, hemorrhage, inflammation and fistulization accompanied by modulation of the lymphocyte subsets toward an increase in T regulatory cells and a decrease in activated

Evidence level

Several human studies show positive signals, while research methods and sample sizes continue to develop.

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