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- W277156799 abstract "Background This study was to evaluate whether anergic cells induced by the blockade of CD40-CD154 and CD28-B7 costimulatory pathways can act as potent immunoregulatory cells in vitro and prolong cardiac allograft survival after adoptive transfer.Methods Anergic cells were induced in vitro by the addition of anti-CD154 and anti-CD80 monoclonal antibodies (mAbs) to primary MLR (mixed lymphocyte reaction) consisting of BALB/c as responder and C3H as stimulator. Anergic cells were added to a newly formed MLR in assessing the regulatory capacity and antigen specificity of anergic cells. The ability of anergic cells to respond to antigen and/or exogenous recombinant mouse interleukin-2 (rmIL-2) was tested. For in vivo studies, anergic cells were intravenously injected into 3.0-Gy γ-irradiated BALB/c mice immediately after heterotopic abdominal cardiac transplantation. To prolong allograft survival, recipient mice injected with anergic cells received rapamycin therapy (1 mg·day-1·kg-1).Results Anergic cells strongly suppressed the proliferation of naǐve BALB/c splenocytes against the original (C3H) stimulator in a dose-dependent manner, but they failed to suppress the proliferation of naǐve BALB/c splenocytes against the third-party (C57BL/6J) stimulator. The anergic state was reversed by both original (C3H) stimulator and additional exogenous IL-2. In in vivo studies, untreated irradiated BALB/c mice rejected C3H cardiac allografts with a mean survival time of (8.6±1.1) days, whereas those injected with the anergic cells rejected the allografts with a mean survival time of (11.8±1.9) days, which was slightly longer than that of the untreated mice. The protocol based on anergic cells injection plus rapamycin therapy could prolong allograft survival significantly [(29.6±4.4) days]. Conclusions Anergic cells induced by the blockade of CD40-CD154 and CD28-B7 costimulatory pathways can act as potent immunoregulatory cells in vitro, and prolong cardiac allograft survival after adoptive transfer in the presence of rap" @default.
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- W277156799 date "2004-01-01" @default.
- W277156799 modified "2023-09-23" @default.
- W277156799 title "Anergic cells induced by the blockade of CD40-CD154 and CD28-B7 costimulatory pathways act as potent immunoregulatory cells in vitro and vivo" @default.
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