异基因骨髓移植小鼠联合输注IL-3/IL-6双基因转导的骨髓基质细胞促进造血恢复

探讨用逆转录病毒载体转入IL 3和IL 6双基因的骨髓基质细胞系QXMSC1IL 3/IL 6对异基因骨髓移植小鼠造血功能的促进作用。用逆转录病毒载体 (含小鼠IL 3cDNA ,人IL 6cDNA)分别转导到骨髓基质细胞系QXMSC1(H 2 d) ,构建骨髓基质细胞系QXMSC1IL 3/IL 6。供体小鼠BALB/c(H 2 d)骨髓去除骨髓中T细胞 ,受体小鼠C57BL/6(H 2 b)经γ射线致死量照射后 ,输入去除T细胞的供体骨髓 (1× 1 0 7/鼠 )的同时输入骨髓基质细胞QXMSC1IL 3/IL 6(5× 1 0 5/鼠 )。在骨髓移植后 2 0和 40天 ,分别检测骨髓移植小鼠外周血RBC ,WBC和骨髓有核细胞数及骨髓中CFU S ,CFU GM ,CFU E和CFU GEMM数。结果 :异基因骨髓移植共输入QXMSC1IL 3/IL 6基质细胞系可使异基因骨髓移植小鼠外周血RBC ,WBC数明显恢复 ,骨髓中有核细胞数 ,CFU S ,CFU GM ,CFU E和CFU GEMM明显增加。基质细胞系QXMSC1可作为有效的基因载体促进骨髓移植后造血功能重建。结论 :基质细胞转入细胞因子IL 3或IL 6基因可以进一步促进骨髓移植后造血功能重建 ,联合转导IL 3和IL 6有协同作用

Accelerating Hematopoietic Recovery in Allogeneic Bone Marrow Transplantation Mice by Co-infusion of Marrow Stromal Cells Transduced with Dual Genes of IL-3/IL-6

To observe whether bone marrow stromal cell line QXMSC1 (H-2(d)) engineered to secrete IL-3 and IL-6 can improved the hematopoiesis in allogeneic bone marrow transplantation (allo-BMT) mice, the stromal cell line QXMSC1IL-3/IL-6 was established by QXMSC1 cells transduced with the recombined retrovirus vector pL3SN containing mouse IL-3 cDNA and pL6SN containing human IL-6 cDNA. The lethally irradiated C57BL/6 (H-2(b)) mice were engrafted with bone marrow cells (1 x 10(7) cells/mouse BALB/c mice, H-2(d)) in which T cells were depleted by anti-Thy1.2 monoclonal antibody adding complement, and QXMSC1IL-3/IL-6 cells (5 x 10(5)/mouse) were co-infused at same time. The hematopoiesis of recipient mice was observed in 20 and 40 days post-transplantation. Blood RBC and WBC were counted, and nucleated cells, CFU-S, CFU-GM, CFU-E and CFU-GEMM were assayed in recipient bone marrow. Results showed that IL-3 and IL-6 were stably expressed in QXMSCQIL-3/IL-6 cells. Compared with BMT and co-infusion with QXMSC1 or QXMSC1 pLXSN cell groups, co-graft with QXMSC1IL-3/IL-6 cells increased the number of blood RBC and WBC in the recipients, and also significantly increased nucleated cells, CFU-S, CFU-GM, CFU-E and CFU-GEMM in recipient bone marrow. It is concluded that the marrow stromal cells transduced with IL-3/IL-6 cDNA improve the hematopoiesis in allo-BMT mice. Co-graft with QXMSC1IL-3/IL-6 cells has synergistic effect in accelerating hematopoietic reconstitution.