Sci Signal:IL-2信号通路对自身免疫疾病的影响

2017-12-27 药明康德 学术经纬

调节性T细胞 (regulatory T cells, Treg) 能够抑制对自体产生反应的效应T细胞,从而防止诸如1型糖尿病这类自身免疫疾病的产生。而白细胞介素-2 (interleukin-2, IL-2) 对Treg细胞不同亚型的发育和在体内的动态平衡非常重要。

调节性T细胞 (regulatory T cells, Treg) 能够抑制对自体产生反应的效应T细胞,从而防止诸如1型糖尿病这类自身免疫疾病的产生。而白细胞介素-2 (interleukin-2, IL-2) 对Treg细胞不同亚型的发育和在体内的动态平衡非常重要。 编码 IL-2和它的受体的基因上出现的变异与自身免疫疾病的风险相关。为了研究IL-2信号通路对自身免疫疾病的影响,迈阿密大学 (University of Miami) 的研究人员在Treg细胞中表达了一种IL-2受体β亚基的突变体,这种突变受体亚基能够将IL-2信号强度降低2~3倍。研究人员发现,在1型糖尿病的小鼠模型中,如果将在Treg细胞中的IL-2信号通路强度降低,小鼠将更早出现糖尿病症状。同时,这些小鼠体内不同Treg细胞亚型的数目和活性下降,而自身反应效应T细胞会入侵胰脏。

这项研究表明在自身免疫疾病中使用低剂量的IL-2来调节不同Treg细胞亚型可能是值得研究的医疗策略。

原始出处:

Connor J. Dwyer,et al.,Altered homeostasis and development of regulatory T cell subsets represent an IL-2R–dependent risk for diabetes in NOD mice.Sci Signal.19 Dec 2017:Vol. 10, Issue 510, eaam9563.

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    2018-04-11 yaanren
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    2018-01-01 楚秀娟
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    2017-12-29 tomyang93
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    2017-12-28 Jackie Li

    学习

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目前已经证实免疫炎症在烟雾病(MMD)的发病机理中起关键作用。然而,循环的Treg / Th17细胞MMD患者中,如何参与并导致该疾病发生,仍然不清楚。我们的研究结果表明循环的Treg参与了MMD的发病机制,并且是重要的因素。

J Immunol:调节性T细胞缺失引发小鼠Th2型自身免疫胃炎

免疫系统最重要的功能之一就是区分自我与非我,从而在抵抗外界侵染的同时避免对自身组织的误伤。T细胞免疫耐受从胸腺发起,主要由外周的淋巴结组织发挥功能,其中T细胞的删除、免疫耐受以及调节性T细胞共同作用保证体内免疫稳态。 自身免疫性胃炎(AIG)是一类以自身抗体分泌增多为症状之一的胃病。患有此病的患者常常会恶化导致胃癌的发生。 此前对于AIG的研究重要集中在Treg以及免疫耐受方面,其中一个经典的