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首页> 外文期刊>Human Immunology: Official Journal of the American Society for Histocompatibility and Immunogenetics >Regulatory CD4+CD25hi T cells conserve their function and phenotype after granulocyte colony-stimulating factor treatment in human hematopoietic stem cell transplantation.
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Regulatory CD4+CD25hi T cells conserve their function and phenotype after granulocyte colony-stimulating factor treatment in human hematopoietic stem cell transplantation.

机译:在人类造血干细胞移植中,粒细胞集落刺激因子治疗后,调节性CD4 + CD25hi T细胞保留其功能和表型。

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摘要

Acute graft-versus-host disease (aGVHD), mediated by CD4(+) and CD8(+) effector T cells, is a life-threatening complication in hematopoietic stem cell transplantation. CD4(+)CD25(hi) regulatory T cells (T(reg)) have been shown to modulate tolerance to aGVHD in murine models. Based on these observations, we examined their role in the prevention of aGVHD in patients who underwent transplantation with peripheral blood-mobilized hematopoietic stem cells after administration of granulocyte colony-stimulating factor. The effects of the G-CSF on the phenotype, frequency, and function of CD4(+)CD25(hi) T cells were analyzed in grafts and after transplantation to determine whether these cells were regulatory T cells. CD4(+)CD25(hi) T cells could be detected at the same frequency before and after granulocyte colony-stimulating factor administration in the donors' peripheral blood. The isolation of these cells from the grafts or from the recipients' peripheral blood after transplantation revealed that they were suppressive to the same extent as T(reg) isolated from healthy volunteers. Their number and frequency were estimated in the grafts and the results indicated that protection against aGVHD was not dependent on the T(reg) amount transferred to the recipients. Similarly there was no correlation between the number of circulating CD4(+)CD25(hi) T cells in the recipients' peripheral blood during the early period after transplantation and the outcome of aGVHD.
机译:CD4(+)和CD8(+)效应T细胞介导的急性移植物抗宿主病(aGVHD)是造血干细胞移植中危及生命的并发症。已显示CD4(+)CD25(hi)调节性T细胞(T(reg))可在鼠模型中调节对aGVHD的耐受性。基于这些观察,我们研究了在粒细胞集落刺激因子给药后接受外周血动员造血干细胞移植的患者中,它们在预防aGVHD中的作用。在移植物中和移植后,分析了G-CSF对CD4(+)CD25(hi)T细胞的表型,频率和功能的影响,以确定这些细胞是否为调节性T细胞。在捐献者外周血中施用粒细胞集落刺激因子之前和之后,可以相同的频率检测到CD4(+)CD25(hi)T细胞。从移植物中或从受体的外周血中分离出这些细胞后发现,它们的抑制作用与从健康志愿者体内分离的T(reg)一样。在移植物中估计了它们的数量和频率,结果表明针对aGVHD的保护不取决于转移至受体的T(reg)量。同样,移植后早期患者外周血中循环的CD4(+)CD25(hi)T细胞数量与aGVHD的结果之间也没有相关性。

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