UBXN3B positively regulates STING-mediated antiviral immune responses.

UBXN3B positively regulates STING-mediated antiviral immune responses.
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DOI:
10.1038/s41467-018-04759-8
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发表时间:
2018-06-13
影响因子:
16.6
通讯作者:
Wang P
Wang P
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yang L;Wang L;Ketkar H;Ma J;Yang G;Cui S;Geng T;Mordue DG;Fujimoto T;Cheng G;You F;Lin R;Fikrig E;Wang P

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含泛素调节X结构域的蛋白质(UBXNs)可能参与多种生物学过程。然而,它们的生理功能在很大程度上仍然未知。在此我们提供了生理证据表明UBXN3B正向调节干扰素基因刺激因子(STING)信号通路。由于Ubxn3b基因缺失突变在胚胎期是致死的,我们采用他莫昔芬诱导的Cre - LoxP方法在成年小鼠中产生全身性的Ubxn3b基因敲除小鼠。与Sting基因敲除小鼠一样,Ubxn3b基因敲除小鼠(Ubxn3b−/−)对致死性单纯疱疹病毒1型(HSV - 1)和水疱性口炎病毒(VSV)感染高度易感,与Ubxn3b基因正常的同窝小鼠(Ubxn3b+/+)相比,其免疫反应存在缺陷。在几种小鼠和人类的Ubxn3b基因敲除的原代细胞中,HSV - 1和STING激动剂诱导的免疫反应也降低。机制研究表明,UBXN3B与STING及其E3连接酶TRIM56相互作用,并促进STING的泛素化、二聚化、转运,以及随后TBK1的募集和磷酸化。这些结果提供了将UBXN家族与抗病毒免疫反应联系起来的生理证据。 UBXN蛋白质可能参与多种生物学过程,但其生理功能在很大程度上仍然未知。在此作者表明在病毒感染的情况下UBXN3B正向调节STING介导的免疫反应。
The ubiquitin regulatory X domain-containing proteins (UBXNs) are likely involved in diverse biological processes. Their physiological functions, however, remain largely unknown. Here we present physiological evidence that UBXN3B positively regulates stimulator-of-interferon genes (STING) signaling. We employ a tamoxifen-inducible Cre-LoxP approach to generate systemic Ubxn3b knockout in adult mice as the Ubxn3b-null mutation is embryonically lethal. Ubxn3b−/−, like Sting−/− mice, are highly susceptible to lethal herpes simplex virus 1 (HSV-1) and vesicular stomatitis virus (VSV) infection, which is correlated with deficient immune responses when compared to Ubxn3b+/+ littermates. HSV-1 and STING agonist-induced immune responses are also reduced in several mouse and human Ubxn3b−/− primary cells. Mechanistic studies demonstrate that UBXN3B interacts with both STING and its E3 ligase TRIM56, and facilitates STING ubiquitination, dimerization, trafficking, and consequent recruitment and phosphorylation of TBK1. These results provide physiological evidence that links the UBXN family with antiviral immune responses. The UBXN proteins are likely involved in a diverse range of biological processes, but their physiological functions remain largely unknown. Here the authors show that UBXN3B positively regulates STING-mediated immune responses in the context of viral infections.
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