摘要
本研究探讨供体CD4+CD25+调节性T细胞(regulatory T cells,Treg cells)输注对异基因骨髓移植(allo-BMT)后小鼠移植物抗宿主病(GVHD)及移植物抗GVL)效应的影响。建立BALB/c→C57BL/6小鼠EL4白血病骨髓移植模型,体外磁珠分离纯化供鼠CD4+CD25+T细胞,在骨髓移植的同时分别予尾静脉输注CD4+CD25+T细胞、CD4+CD25-T细胞。以移植后生存期、GVHD临床评分、组织病理形态等为观察指标并进行组间比较。结果显示:白血病对照组小鼠平均生存时间为(17.9±0.7)天,均存在白血病细胞浸润;移植对照组及效应T细胞组平均生存时间为(23.2±1.6)天和(22.3±1.9)天,肝脏、皮肤和小肠病理切片显示均存在GVHD病理改变;Treg细胞组小鼠平均生存时间为(47.3±6.5)天,70%的受鼠获得长期存活,病理显示无GVHD及白血病细胞浸润,其GVHD评分较移植对照组及效应T细胞组明显降低(p<0.05)。结论:在小鼠allo-BMT中联合输注供体CD4+CD25+T细胞可减少及减轻GVHD,并保留GVL效应。
In order to explore the influence of purified donor regulatory T cells (Treg) infused after allogeneic bone marrow transplantation (allo-BMT) on GVHD and GVL effect in mice, an EIA leukemia allo-BMT model of BALB/c --C57BL/6 mice was established. The CD4^+CD25^+ T cells were purified by positive selection using MACS. The recipients were injected with CD4^+CD25^+ T cells orCD4^+CD25^+T cells within 4 hours respectively along with allo- BMT. Survival time, clinical GVHD score or histopathological features were observed after allo-BMT. The results showed that the mean survival time in leukemia control group was ( 17.9 ±0.7 ) days and all mice died of leukemia. The mean survival times in transplantation control group and CD4 + CD25 - T group were ( 23.2 ± 1.6 ) and ( 22.3 -±1.9 ) days. Histopathological analysis in several target organs (skin, liver and small intestine) confirmed the presence of severe GVHD. The mean survival time in Treg group was (47.3 ± 6.5 ) days. 70% of recipients were alive until day 60 without features of GVHD or tumor progression. Clinical GVHD scores in Treg group significantly decreased as compared to transplantation control group and CD4^+CD25^+ T group ( p 〈 0. 05 ). It is concluded that aUo-BMT combined with injection of donor CD4^+CD25^+ Treg cells can efficiently prevent recipients from lethal GVHD with preserving GVL effect during allo-BMT. Key words
出处
《中国实验血液学杂志》
CAS
CSCD
2010年第1期181-184,共4页
Journal of Experimental Hematology
基金
国家自然科学基金资助项目(编号30770915)
江苏省"科教兴卫"领军人才基金资助项目(编号LJ200612)
关键词
骨髓移植
调节性T细胞
移植物抗宿主病
移植物抗白血病效应
bone marrow transplantation
regulatory T cells
graft-versus-host disease
graft-versus-leukemia effect