アロ抗原刺激に対するさい帯血のIL‐2産生動態とさい帯血幹細胞移植

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  • IL-2 Production and Its Kinetics of Cord Blood Following Alloantigen Stimulation Implications in Cord Blood Stem Cell Transplantation.

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We previously reported that alloantigen-specific cytotoxic T lymphocytes (CTL) could be induced similarly in both cord and adult blood mononuclear cells. Here, we report the kinetics of IL-2 production of cord blood mononuclear cells and the effect of immunosuppressants on IL-2 production. A mixed lymphocyte culture was set up, using cord blood mononuclear cells as responders and irradiated allogeneic mononuclear cells of a healthy adult as stimulators. IL-2 concentration was serially determined from day 1 to day 6. There was no significant difference in IL-2 production in cord and adult blood mononuclear cells. Immunosuppressants, cyclosporin A and FK506, significantly inhibited IL-2 production. These in vitro results, together with our previous observation, suggest that IL-2-dependent CTL may cause graft-versus-host disease and also graft-versusleukemia effect in cord blood stem cell transplantation.

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