IL-10 exacerbates xenogeneic GVHD by inducing massive human T cell expansion.

IL-10 exacerbates xenogeneic GVHD by inducing massive human T cell expansion.
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IL-10通过诱导大量的人类T细胞扩张来加剧异构GVHD。

DOI:
10.1016/j.clim.2014.11.004
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发表时间:
2015-01
期刊:
Clinical immunology (Orlando, Fla.)
影响因子:
--
通讯作者:
Shankar P
Shankar P
中科院分区:
其他
文献类型:
--
作者:
Abraham S;Choi JG;Ye C;Manjunath N;Shankar P

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尽管GVHD患者血清IL 10水平升高,但其作用是保护性的还是致病性的仍不清楚。在这里,我们使用人源化小鼠模型来研究IL-10在GVHD中的作用。当将人PBMC移植到表达人IL-10的NOD-scid IL 2 r γcnull小鼠中时,T细胞经历大量扩增,导致第21天的致死性,而对照小鼠存活至少40天。肝脏组织学显示IL-10表达小鼠中广泛的单核细胞浸润,但对照小鼠中没有。与它们的攻击性相对应,IL-10组中的T细胞主要表现出效应记忆表型(CD 45 RO + CD 27 −),而在对照小鼠中,T细胞具有过渡记忆表型(CD 45 RO + CD 27+)。此外,IL-10受体阻断抗体能够保护动物免受GVHD。由于我们的研究结果表明IL-10的直接致病作用,阻断IL-10信号传导可能为GVHD提供治疗选择。
Although patients with GVHD have elevated serum levels of IL10, whether its role is protective or pathogenic remains unclear. Here, we used a humanized mouse model to study the role of IL-10 in GVHD. When human PBMCs were engrafted in NOD-scid IL2rγcnull mice expressing human IL-10, the T cells underwent massive expansion resulting in lethality by day 21, whereas control mice survived for at least 40 days. Histopathology of the liver showed extensive mononuclear cell infiltration in IL-10 expressing but not in control mice. Corresponding to their aggressiveness, the T cells in the IL-10 group exhibited predominantly an effector memory phenotype (CD45RO+CD27−) while in control mice, the T cells were of transitional memory phenotype (CD45RO+CD27+). Further, IL-10 receptor blocking antibody was able to protect the animals from GVHD. Since our results demonstrate a direct pathogenic role for IL-10, blockade of IL-10 signaling may provide a therapeutic option for GVHD.
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