机构地区:[1]徐州医学院移植免疫实验室徐州医学院附属医院血液科,江苏徐州221002
出 处:《国际输血及血液学杂志》2013年第1期1-6,共6页International Journal of Blood Transfusion and Hematology
基 金:国家自然科学基金项目(81070446)
摘 要:目的探讨异基因骨髓移植中联合内皮祖细胞(EPC)移植对接受白消安/环磷酰胺(Bu/CY)方案预处理小鼠移植后免疫重建的影响。方法选择周龄为8~10周龄,体重为(22~24)g的健康SPF级雄性BALB/c小鼠58只作为研究对象。随机分为正常对照组(n=9):经尾静脉注射磷酸盐缓冲液(PBS)0.2mL;BU/CY预处理组(n=9):移植前7d至前2d接受Bu/CY方案预处理后,经尾静脉注射PBS0.2mL;单纯骨髓细胞移植组(BMT组)(n=20):BU/CY方案预处理后,经尾静脉注射供者骨髓细胞;EPC联合移植组(EPC组)(n=20):BU/CY方案预处理后,经尾静脉注射供者骨髓细胞及EPC。于移植后第14,21,28天,采用流式细胞术检测各组小鼠骨髓中B系祖(ProB)细胞(CD19+c-kit+IgM-)数量、胸腺中CD4+,CD8+,双阳性(DP)及双阴性(DN)T淋巴细胞比例及脾脏中CD4+,CD8+T淋巴细胞及B淋巴细胞比例,并通过苏木素-伊红染色及免疫组化染色观察中枢和外周免疫器官组织结构的恢复及损伤血管内皮的修复情况。结果移植后BMT及EPC组小鼠骨髓中ProB细胞数量持续增高,第14天时,EPC组(0.83×10^6)显著高于BMT组(0.14×10^6)(χ2=7.2,P〈0.05);胸腺中DP细胞比例于第21天达峰值,EPC组(0.58%)较BMT组(0.39%)显著增高(χ2=6.49,P〈0.05);脾脏中CD4+T细胞比例持续增高,第28天时,EPC组(3.64%)较BMT组(2.47%)显著增高(χ2=7.2,P〈0.05);CD8+T细胞比例在移植后第21天达峰值,EPC组(3.64%)较BMT组(3.21%)显著增高(χ2=5.42,P〈0.05)。组织病理学检查也显示EPC组小鼠的中枢及外周免疫器官组织结构恢复较BMT组快,组织中实质细胞数量恢复较BMT组快;对脾脏血窦内皮免疫组化染色的结果也显示,EPC组小鼠脾血窦内皮完整性的恢复较BMT组快。结论BU/CObjective To study the effects of endothelial progenitor cell (EPC) on immune reconstitution in mice undergoing allo-geneic bone marrow transplantation after busulfan/cyclophosphamide (BU/CY) pretreatment. Methods Fifty eight healthly SPF male BALB/c mice aged (8-10) weeks and weighted (22 24)g were randomly divided into control group (n=9), which injected with 0.2 mL phosphate buffer solution (PBS) : BU/CY pretreatment group (n= 9), which treated with BU/CY from day -7 to day -2 and injected with 0. 2 mL PBS;bone marrow cells transplantation (BMT) group (n= 20), which injected with donor derived bone marrow cells after BU/CY pretreatment; EPCs combined with BMT (EPC) group (n = 20), which injected with donor derived bone marrow cells and EPCs after BU/CY pretreatment. The number of progenitor B (ProB) cells (CD19+ c-kit+ IgM- ) in the bone marrow and the percentages of CD4+, CD8+, double positive (DP), double negative(DN)T cells in the thymus and the percentages of CD4+, CD8+ T cells and B cells in the spleen were detected by flow cytometry . Themorphology of immune organs was observed by the light microscope to evaluate the repair of tissues and injured endothelial cells. Results The number of ProB cells in BMT group and EPC group increased continuously after transplantation, and compared with the BMT group (0. 14 × 10^6 ), the EPC group (0.83×10^6) increased significantly on day 14 (χ2 = 7. 2, P〈0. 05). The percentage of DP cells in the thymus reached the highest peak on day 21, and increased significantly in the EPC group (0.58 % ) compared with the BMT group (0.39%) (χ2 =6.49, P〈0.05). After transplantation, the percentage of CD4+ T cells in the spleen also had gradual increase, and the EPC group (3.64%) increased significantly compared with the BMT group (2.47%) (χ2 =7.2,P〈0. 05) on day 28;The percentage of CD8+ T cells in the spleen peaked on day 21, with the EPC group (3.64%) in
分 类 号:R551.3[医药卫生—血液循环系统疾病]
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