外周血干细胞骨髓腔内输注对移植物抗宿主病的影响

本研究建立髓腔内外周造血干细胞输注(IBM-PBSCT)动物移植模型并观察该方法对移植物抗宿主病(GVHD)的影响。选取雌性C57BL/6小鼠为移植受鼠,于第0天接受全身照射(TBI)4Gy后,输注经rhG-CSF动员的雄性BABL/c小鼠外周血造血干细胞(1×107),2天后腹腔注射环磷酰胺(CTX),观察各组小鼠GVHD发生情况。结果显示:髓腔内PBSCT组的受鼠GVHD发生率较尾静脉输注组明显减低(p<0.05),移植后在受鼠体内观察到供鼠来源的Y染色体存在。结论:与尾静脉输注比较,髓腔内输注外周血造血干细胞不仅能减少GVHD的发生,而且更有利于干细胞植入。

Influence of Intra-bone Marrow Infusion of Peripheral Hematopoietic Stem Cells on Graft-Versus-Host Disease

This study was aimed to explore whether the graft-versus-host disease (GVHD) could be alleviated by intra-bone marrow (IBM) infusion of allogeneic hematopoietic stem cells. Female C57BL/6 mice as recipients received total body irradiation (TBI) 4 Gy on day 0, followed by injection of peripheral hematopoietic stem cells (1 x 10(7)) from mobilized male BALB/c with granulocyte-colony stimulating factor (rhG-CSF), and cyclophosphamide (200 mg/kg) was injected intraperitoneally two days later. The results showed that the incidence and severity of GVHD were more low and alleviative in group IBM-PBSCT than that in group TV-PBSCT (p < 0.05). Y chromosome of donor mice could be detected in the bone marrow of recipient mice. It is concluded that the method of intra-bone marrow infusion is superior to injection via the tail vein in the engraftment of hematopoietic stem cells in terms of stem cell homing while the frequency and severity of GVHD in allogeneic mice decrease.