新型外周血CD34^+细胞动员剂——抗CD49d单克隆抗体的实验研究

Effect of Anti-CD49d Monoclonal Antibody on Mobilization of CD34 Positive Cell into Peripheral Blood in Mice

为了探讨外周血干细胞动员的新途径 ,用抗CD4 9d单克隆抗体和rhG CSF及二者联合给小鼠皮下注射 ,动态观察小鼠外周血的白细胞总数和CD34+ 细胞数的变化 ,并将各种动员方法所获得的干细胞分别进行干细胞移植。结果发现 ,给予动员剂后小鼠的外周血白细胞总数和CD34+ 细胞比例明显升高 ,以rhG CSF和抗CD4 9d单克隆抗体联合给药效果最佳。移植后各组小鼠均获造血重建 ,以联合动员组造血恢复速度最快。结论 :抗CD4 9d单克隆抗体能有效动员小鼠外周血干细胞 ,与rhG CSF具有协同作用。

To study the mobilization of peripheral blood stem cells (PBSC) with anti-CD49d monoclonal antibody and try to find a new method for mobilization of PBSC, anti-CD49d McAb, rhG-CSF and combination of anti-CD49d McAb with rhG-CSF were administered subcutaneously to mice separately, the count of white blood cells (WBC) and percentage of CD34 + cells in peripheral blood of donor mice were dynamically observed, CD34 positive cells obtained by above methods were transfused to recipient mice. The results showed that the count of WBC and percentage of CD34 + cells in peripheral blood of donor mice elevated significantly after the administration of anti-CD49d McAb, rhG-CSF or combination of anti-CD49d McAb with rhG-CSF. The most effective method for mobilization is the combination of rhG-CSF with anti-CD49d McAb. Reconstitution of hematopoiesis was successful in all group recipient mice after transplantation. Most rapid hematopoietic recovery was observed in recipient mice by rhG-CSF plus anti-CD49d McAb for mabilization. In conclusion, anti-CD49d McAb is effective and synergistic with rhG-CSF in mobilization of CD34 positive cells from bone marrow into peripheral blood.