3种同种异基因混合骨髓移植小鼠(A+B+C→A)的模型

A Murine Model of Three Mixed Allogeneic Bone Marrow Transplantation(A+B+C→A)

本研究目的为建立 3种异基因小鼠 (BALB/c ,H 2 d;C5 7BL/ 6 ,H 2 b 和CBA/N ,H 2 k)混合骨髓移植模型(A +B +C→A) ,观察此模型能否延长骨髓移植后受体鼠的存活时间。采用受致死量照射的小鼠接受同基因与 2种异基因 3种混合 (比例为 1∶4∶4 )的骨髓移植。同时还观察了 3种混合淋巴细胞培养及 2种不同抗原混合刺激的迟发型超敏反应。结果显示 ,混合骨髓移植的小鼠存活时间明显长于单纯异基因移植的小鼠 ,混合移植组平均存活时间为 5 6 .6± 2 7天 ,最长者为 10 3天 ,而单纯异基因移植的对照组存活时间为 15± 5天 ,两组比较有显著性差异(P <0 .0 0 1) ;3种混合的淋巴细胞培养 ,不管是 2种反应细胞与 1种刺激细胞混合培养 ,还是 1种反应细胞与 2种刺激细胞混合培养 ,均表现明显低于一对一的混合淋巴细胞反应 ,2种混合细胞刺激的迟发型超敏反应亦明显低于1种抗原刺激的反应。结论 :同基因与 2种异基因 3种混合的骨髓移植可使受髓小鼠存活时间明显延长。

In this paper, a model of three allogeneic mixed bone marrow transplantation of mice (BALB/c, H 2 d; C57BL/6, H 2 b; and CBA/N, H 2 k) was established and whether or not prolongation of the survival time in recipient mice was observed. Lethally irradiated mice were transplanted with a mixture of a syngeneic plus two allogeneic bone marrow (A+B+C→A, in a ratio of 1∶4∶4). At same time, mixed lymphocyte culture (MLC) with three allogeneic lymphocytes in vitro and two allogeneic antigens stimulated delayed type hypersensitivity (DTH) in vivo were performed. The results showed that the mice receiving mixed bone marrow transplant survived 56.6±27 days and the longest 103 days, however, only 15±5 days in the single allogeneic transplantation group. Whether two reacting cells to one stimulating cells or one reacting cells to two stimulating cells, all showed lower activity of MLC than that in one to one control group. In DTH assay, the mice sensitized with two allogeneic antigens showed lower reactivity than that in one antigen stimulated mice. It was concluded that the survival time of recipient mice was significantly prolonged after transplantation with three mixed allogeneic bone marrow.