Aim: To study the effect of murine mesenchymal stem cells (MSCs) on the differentiation, maturation and function of allogenetic bone marrow-derived dendritic cells (DCs) and to investigate the mechanism of MSCs displaying immunoregulatory activity.
Methods: BALB/c mice BMCs were isolated and cultured in vitro and then coclutured with C57BL/6 murine bone marrows cells (BMCs) at different ratios in vitro to induce DCs generation. The phenotype of cells was analyzed by flow cytometry. Endocytosis was measured as the cellular uptake of fluorescein isothiocyanate (FITC)-dextram amd was quantified by flow cytometry. The level of IL-12 secretion in the cell culture supernatants was detected by enzyme-linked immunosorbent assay (ELISA).
Results: Decreased expression of CD11c, CD14, CD83, CD86 and I-A(b);, down-regulated endocytosis capacity and interleukin-12 (IL-12) secretion of DCs were all observed when MSCs cocultured with BMCs at a higher ratio (1:10).
Conclusion: Murine MSCs could supress the differentiation and maturation of DCs derived from allogeneic BMCs in vitro.
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