Knockout of P2Y12 aggravates experimental autoimmune encephalomyelitis in mice via increasing of IL-23 production and Th17 cell differentiation by dendritic cells

Knockout of P2Y12 aggravates experimental autoimmune encephalomyelitis in mice via increasing of IL-23 production and Th17 cell differentiation by dendritic cells
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P2Y12 的敲除通过增加 IL-23 的产生和树突状细胞的 Th17 细胞分化而加重小鼠的实验性自身免疫性脑脊髓炎

DOI:
10.1016/j.bbi.2016.12.001
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发表时间:
2017-05
期刊:
Brain, Behavior, and Immunity
影响因子:
--
通讯作者:
Wenzheng Jiang
Wenzheng Jiang
中科院分区:
其他
文献类型:
--
作者:
Min Qian;Junling Liu;Shufang Cui;Wenzheng Jiang

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实验性自身免疫性脑脊髓炎(EAE)是多发性硬化症(MS)的常见模型,主要由CD4+T细胞介导,伴有中枢神经系统(CNS)脱髓鞘和神经退行性变。p2y12受体的缺失可能与MS/EAE的发病机制有关,但其潜在机制尚不清楚。在本研究中,p2y12基因敲除(P2Y12-KO)小鼠发生的EAE比WT小鼠更严重。敲除p2y12可增加血清中IL-17A的表达以及脾脏和中枢神经系统中Th17细胞的比例。然而,体外研究表明,p2y12不影响CD4+T细胞的细胞分化和增殖。在骨髓来源的树突状细胞(bmdc)中,与野生型(WT) bmdc相比,p2y12的缺失显著增加了IL-23的产生。FACS分析显示p2y12缺陷dc培养上清促进更多naïve CD4+ T细胞向Th17细胞分化。我们的研究结果表明,p2y12受体的基因缺失通过影响BMDCs的细胞因子谱打破了Th亚型的平衡,导致EAE加重,这表明p2y12可能是治疗MS的潜在靶点。
Experimental autoimmune encephalomyelitis (EAE), a common model of multiple sclerosis (MS), is mainly mediated by CD4+T cells with demyelination and neurodegeneration of central nervous system (CNS). The loss of P2Y12receptor might be associated with the pathogenesis of MS/EAE, but its potential mechanism is still not clear. In this study, more severe EAE developed in P2Y12-knockout (P2Y12-KO) mice compared to WT mice. Knockout of P2Y12increased expression of IL-17A in the sera and proportion of Th17 cells in spleen and CNS. However, in vitro studies showed that P2Y12did not influence cell differentiation and proliferation of CD4+T cells. In bone marrow-derived dendritic cells (BMDCs), loss of P2Y12significantly increased the production of IL-23 in contrast to the wild-type (WT) BMDCs. FACS analysis indicated that the culture supernatant from P2Y12-deficient DCs promoted more naïve CD4+ T cells to differentiate into Th17 cells. Our finding demonstrated that genetic deletion of P2Y12receptor broke the balance of Th subtypes by affecting the cytokine profile of BMDCs and resulted in the aggravated EAE, which suggested that P2Y12may be a potential target in treating MS.
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