Objective To explore the effect of α-galactosyleramide （α-GalCer） on immune reconstitution under acute graft-versus-host disease （aGVHD）. Methods BALB/c mice were transplanted with allogeneic C57BL/6 bone marro...Objective To explore the effect of α-galactosyleramide （α-GalCer） on immune reconstitution under acute graft-versus-host disease （aGVHD）. Methods BALB/c mice were transplanted with allogeneic C57BL/6 bone marrow cells and splenocytes （both 1 × 10^7） after receiving lethal total-body irradiation, α-GalCer （100 ug/kg） or vehicle （dimethyl- sulfoxide） was administered intraperitoneally immediately after transplantation. The effects of α-GalCer on immune reconstitufion, proliferation of T cells and B cells, hematopoiesis, and thymic microenvironment were assessed. Results The α-GalCer group exhibited higher percentages of CD3^＋, CD4^＋, CD8^＋, B220^＋, CD40＋, and CD86＋cells compared with the vehicle group. The number of colony forming unit per 1000 CD34^＋ cells in the et-GalCer group was higher than in the vehicle group （P=0.0012）. In vitro proliferation assays showed that the α-GalCer group had higher percentages of CD3^＋, CD4^＋, CD8^＋, and B220^＋ cells compared with the vehicle group. As for the results of in vivo proliferation assays, the numbers of CD3^＋, CD4^＋, CD8^＋, and B220^＋ cells were higher in the α-GalCer group than in the normal group, especially the number of B220^＋ cells （P=0.007）. Significant difference was not found in thymocyte count between the α-GalCer group and the vehicle group, nor in the percentages of CD3^＋, CD4^＋, and CD8^＋ cells. Conclusion Administration of tl-GalCer after allogeneic bone marrow transplantation may promote immune reconstitution in the presence of aGVHD.展开更多
基金Supported by National Natural Science Foundation of China (30670898, 30572108)National Basic Research Program of China (973 Program) (2005CB522400)Capital Research Fund for Medical Development (2007-2040)
文摘Objective To explore the effect of α-galactosyleramide （α-GalCer） on immune reconstitution under acute graft-versus-host disease （aGVHD）. Methods BALB/c mice were transplanted with allogeneic C57BL/6 bone marrow cells and splenocytes （both 1 × 10^7） after receiving lethal total-body irradiation, α-GalCer （100 ug/kg） or vehicle （dimethyl- sulfoxide） was administered intraperitoneally immediately after transplantation. The effects of α-GalCer on immune reconstitufion, proliferation of T cells and B cells, hematopoiesis, and thymic microenvironment were assessed. Results The α-GalCer group exhibited higher percentages of CD3^＋, CD4^＋, CD8^＋, B220^＋, CD40＋, and CD86＋cells compared with the vehicle group. The number of colony forming unit per 1000 CD34^＋ cells in the et-GalCer group was higher than in the vehicle group （P=0.0012）. In vitro proliferation assays showed that the α-GalCer group had higher percentages of CD3^＋, CD4^＋, CD8^＋, and B220^＋ cells compared with the vehicle group. As for the results of in vivo proliferation assays, the numbers of CD3^＋, CD4^＋, CD8^＋, and B220^＋ cells were higher in the α-GalCer group than in the normal group, especially the number of B220^＋ cells （P=0.007）. Significant difference was not found in thymocyte count between the α-GalCer group and the vehicle group, nor in the percentages of CD3^＋, CD4^＋, and CD8^＋ cells. Conclusion Administration of tl-GalCer after allogeneic bone marrow transplantation may promote immune reconstitution in the presence of aGVHD.
