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Effects of mesenchymal stromal cells on human myeloid dendritic cell differentiation and maturation in a humanized

Ping Chen1, Yanfei Huang1, Karl L Womer1

  • 1Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

Journal of Immunological Methods
|November 3, 2015
PubMed

Mesenchymal stromal cells (MSCs) have shown promise as cellular therapy in allogeneic transplantation, although the precise mechanisms underlying their benefit in clinical trials are difficult to study. We previously demonstrated that MSCs exert immunoregulatory effects in mouse bone marrow-derived dendritic cell (DC) culture. Since mouse studies do not reliably reproduce human events, we used a humanized mouse model to study the immunomodulatory effects of human MSCs on human DC immunobiology. Humanized mice were established by injection of cord blood CD34(+) cells into NOD.Cg-Prkdc(scid) Il2rg(tm1Wjl/SzJ) (NOD scid gamma, NSG) mice. Human cells were detected in the mouse bone marrow, blood, and spleen 12weeks after transplantation. Human DCs were differentiated from humanized mouse bone marrow cells during human MSC co-culture. MSCs inhibited DC differentiation and kept DCs in an immature state as demonstrated by phenotype and function. In conclusion, humanized mouse models represent a useful method to study the function of human MSCs on human DC immunobiology.

Keywords:
Dendritic cellsHumanized miceMesenchymal stromal cells

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