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- W2147506377 abstract "Background. Successful xenograft transplantation faces several obstacles including the presence of xenoantibodies, natural killer cell- and macrophage-mediated rejection, and T lymphocyte activation. Methods. A mouse-to-rat cardiac xenograft model was used to examine the synergistic effect of anti-T cell receptor (TCR) monoclonal antibodies (mAb) and 15-deoxyspergualin (DSG) on graft survival. Results. Pretransplantation injections (days −5, −3, and −1) of anti-TCR mAb (500 μg/kg/day) combined with continuous i.p. infusion of DSG (5 mg/kg/day) from day −7 to 28 significantly prolonged graft survival compared to untreated controls (3.3±0.5 vs. 44.2±5.6 days, P <0.001). Postoperative splenectomy combined with discontinuation of all other treatment on day 28 enhanced graft survival in rats treated with anti-TCR mAb and DSG to 71.0±2.5 days. Histological examination of grafts showed characteristic signs of vascular rejection: interstitial edema and hemorrhage, and polymorphonuclear cell infiltration. Anti-mouse antibody titers in recipients were increased upon rejection in each group that received a xenograft. Flow cytometry analysis showed a markedly decreased T cell population and a relatively increased mature B cell population (IgMbright/IgDdull) in spleens of rats treated with anti-TCR mAb and DSG on day 28. Conclusions. The mechanism of prolonged xenograft survival in this model may include inhibition of antibody production by arrest of B-cell maturation during development from IgMdull/IgDbright mature B cells to antibody producing cells, and inhibition of T cell activation. The rejection seen in our model may be caused by xenoreactive antibodies and may be associated with T cells, natural killer cells, and macrophages." @default.
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- W2147506377 date "2000-06-01" @default.
- W2147506377 modified "2023-09-24" @default.
- W2147506377 title "SYNERGISTIC EFFECT OF ANTI-T CELL RECEPTOR MONOCLONAL ANTIBODY AND 15-DEOXYSPERGUALIN ON CARDIAC XENOGRAFT SURVIVAL IN A MOUSE-TO-RAT MODEL1" @default.
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- W2147506377 doi "https://doi.org/10.1097/00007890-200006270-00023" @default.
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