Opposing Functions of Microglial and Macrophagic TNFR2 in the Pathogenesis of Experimental Autoimmune Encephalomyelitis.

Opposing Functions of Microglial and Macrophagic TNFR2 in the Pathogenesis of Experimental Autoimmune Encephalomyelitis.
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DOI:
10.1016/j.celrep.2016.11.083
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发表时间:
2017-01-03
期刊:
影响因子:
8.8
通讯作者:
Brambilla R
Brambilla R
中科院分区:
生物学1区
文献类型:
--
作者:
Gao H;Danzi MC;Choi CS;Taherian M;Dalby-Hansen C;Ellman DG;Madsen PM;Bixby JL;Lemmon VP;Lambertsen KL;Brambilla R

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在多发性硬化症中,可溶性肿瘤坏死因子通过激活肿瘤坏死因子受体1(TNFR1)而有害,而跨膜型肿瘤坏死因子主要通过激活肿瘤坏死因子受体2(TNFR2)而有益。在这里,我们通过细胞特异性基因打靶来研究TNFR2在实验性自身免疫性脑脊髓炎(EAE)中的作用。我们发现,去除小胶质细胞中的TNFR2会导致EAE的早期发病,并伴有中枢神经系统(CNS)中白细胞浸润、T细胞激活和脱髓鞘的增加。相反,去除单核/巨噬细胞中的TNFR2会抑制EAE,并损害外周T细胞的激活,并减少CNS T细胞的浸润和脱髓鞘。我们的工作揭示了髓系细胞中TNFR2的两种功能,小胶质细胞TNFR2提供保护信号以遏制疾病,单核/巨噬细胞TNFR2驱动免疫激活和EAE启动。当以TNFR2为靶点治疗神经炎性疾病时,必须考虑到这一点。
In multiple sclerosis (MS), soluble tumor necrosis factor (TNF) is detrimental via activation of TNF receptor 1 (TNFR1), whereas transmembrane TNF is beneficial primarily by activating TNF receptor 2 (TNFR2). Here we investigate the role of TNFR2 in microglia and monocytes/macrophages in experimental autoimmune encephalomyelitis (EAE), a model of MS, by cell-specific gene targeting. We show that TNFR2 ablation in microglia leads to early onset of EAE with increased leukocyte infiltration, T cell activation, and demyelination in the central nervous system (CNS). Conversely, TNFR2 ablation in monocytes/macrophages results in EAE suppression with impaired peripheral T cell activation, and reduced CNS T cell infiltration and demyelination. Our work uncovers a dichotomy of function for TNFR2 in myeloid cells, with microglial TNFR2 providing protective signals to contain disease, and monocyte/macrophagic TNFR2 driving immune activation and EAE initiation. This must be taken into account when targeting TNFR2 for therapeutic purposes in neuroinflammatory diseases.
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