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Journal Article
Research Support, Non-U.S. Gov't
Immunomodulatory properties of colonic mesenchymal stem cells.
Immunology Letters 2013 November
AIM: To elucidate the immunomodulatory functions of colonic mesenchymal stem cells (MSCs) in the colonic mucosal immune system.
METHODS: The colonic MSCs were isolated, enriched and expanded. The immunosuppressive role of colonic MSCs on activated T cells was evaluated. The cell cycle progression of T cells and the expression of FoxP3+ T cells were assessed by fluorescence-activated cell sorting (FACS). The levels of cytokines and PGE2 were measured by ELISA.
RESULT: Mouse colonic MSCs can inhibit the proliferation of activated T cells by arresting cells in G0/G1 phase, induce the expression of CD4+CD25+Foxp3+ T cells (8.05%±0.49% in transwell culture vs 8.45%±0.64% in direct contact culture vs 4.30%±0.28% in control, p<0.05), downregulate the levels of the cytokines TNF-α and IFN-γ, and increase the production of IL-10 (p<0.05). The data obtained from transwell culture and direct contact culture showed no difference (p>0.05). PGE2 level was increased when T cells were cultured with colonic MSCs (385.10±19.45 ng/l in transwell culture vs 387.91±19.85 ng/l in direct contact culture vs 276.21±25.49 ng/l in control, p<0.05). Blocking PGE2 partially reversed the immunosuppression of MSCs on activated T cells proliferation (p<0.05).
CONCLUSION: Colonic MSCs have the same immunosuppressive property as other MSCs. They performed their functions partially through secreting soluble factor PGE2. The characterization of these colonic MSCs may be helpful for studying the involvement of stromal cell compartment in colon diseases.
METHODS: The colonic MSCs were isolated, enriched and expanded. The immunosuppressive role of colonic MSCs on activated T cells was evaluated. The cell cycle progression of T cells and the expression of FoxP3+ T cells were assessed by fluorescence-activated cell sorting (FACS). The levels of cytokines and PGE2 were measured by ELISA.
RESULT: Mouse colonic MSCs can inhibit the proliferation of activated T cells by arresting cells in G0/G1 phase, induce the expression of CD4+CD25+Foxp3+ T cells (8.05%±0.49% in transwell culture vs 8.45%±0.64% in direct contact culture vs 4.30%±0.28% in control, p<0.05), downregulate the levels of the cytokines TNF-α and IFN-γ, and increase the production of IL-10 (p<0.05). The data obtained from transwell culture and direct contact culture showed no difference (p>0.05). PGE2 level was increased when T cells were cultured with colonic MSCs (385.10±19.45 ng/l in transwell culture vs 387.91±19.85 ng/l in direct contact culture vs 276.21±25.49 ng/l in control, p<0.05). Blocking PGE2 partially reversed the immunosuppression of MSCs on activated T cells proliferation (p<0.05).
CONCLUSION: Colonic MSCs have the same immunosuppressive property as other MSCs. They performed their functions partially through secreting soluble factor PGE2. The characterization of these colonic MSCs may be helpful for studying the involvement of stromal cell compartment in colon diseases.
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