PKR mediated regulation of inflammation and IL-10 during viral encephalomyelitis.

PKR mediated regulation of inflammation and IL-10 during viral encephalomyelitis.
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DOI:
10.1016/j.jneuroim.2014.02.012
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发表时间:
2014-05-15
影响因子:
3.3
通讯作者:
Bergmann, Cornelia C.
Bergmann, Cornelia C.
中科院分区:
医学4区
文献类型:
--
作者:
Kapil, Parul;Stohlman, Stephen A.;Hinton, David R.;Bergmann, Cornelia C.

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双链RNA依赖性蛋白激酶(PKR)调节抗病毒活性、免疫应答、细胞凋亡和神经毒性。胶质萎缩性冠状病毒感染诱导PKR激活的感染以及未感染的细胞在中枢神经系统(CNS)。然而,PKR缺陷仅适度增加病毒复制,并且不影响IFN-α/β 1或IL-1β表达。尽管IL-6、Ccl 5和Cxcl 10 mRNA减少,但蛋白水平保持不变。此外,PKR缺陷选择性地减少CD 4 T细胞中IL-10的产生,但不影响CD 8 T细胞,而不影响CNS病理学。结果表明PKR能够通过选择性调节中枢神经系统驻留细胞和CD 4 T细胞中的关键细胞因子和趋化因子来平衡神经炎症。PKR对嗜神经性冠状病毒感染具有抗病毒活性。PKR调节CCL 5和CXCL 10的转录和翻译表达。PKR促进病毒特异性CD 4 T细胞中IL-10的产生。PKR介导的TIMP 1上调增强CD 4 T细胞的CNS实质进入。
Double-stranded RNA-dependent protein kinase (PKR) regulates antiviral activity, immune responses, apoptosis and neurotoxicity. Gliatropic coronavirus infection induced PKR activation in infected as well uninfected cells within the central nervous system (CNS). However, PKR deficiency only modestly increased viral replication and did not affect IFN-α/β or IL-1β expression. Despite reduced Il-6, Ccl5, and Cxcl10 mRNA, protein levels remained unaltered. Furthermore, PKR deficiency selectively reduced IL-10 production in CD4, but not CD8 T cells, without affecting CNS pathology. The results demonstrate the ability of PKR to balance neuroinflammation by selectively modulating key cytokines and chemokines in CNS resident and CD4 T cells. PKR is dispensable for antiviral activity against neurotropic coronavirus infection. PKR regulates transcriptional and translational expression of CCL5 and CXCL10. PKR promotes IL-10 production in virus specific CD4 T cells. PKR mediated TIMP1 upregulation enhances CNS parenchymal entry of CD4 T cells.
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