allogeneic adult mesenchymal stem cells

Definition / meaning of allogeneic adult mesenchymal stem cells

Human mesenchymal stem cells (MSCs) harvested from bone marrow of healthy adult donors and expanded ex vivo, with potential immunosuppressive activity. Allogeneic adult MSCs are hypo-immunogenic due to lack of major histocompatibility II (MHC II) molecule expression, eliciting little, if any, host immune response upon intravenous infusion. Infusion of allogeneic MSCs may result in: a) increased production of anti-inflammatory cytokines, such as interleukin-10, prostaglandin E, and hepatocyte growth factor; b) decreased mononuclear phagocyte expression of indoleamine 2,3,-dioxygenase, which catabolizes L-tryptophan into its pro-inflammatory metabolites; and c) modulated dendritic cell (DC)maturation and disrupted activities of natural killer (NK) cells and CD8+ and CD4+ T cells. In addition, pluripotent MSCs, upon administration, may be recruited to damaged tissue sites, differentiating along specific lineages when stimulated.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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