RNF138 Downregulates Antiviral Innate Immunity by Inhibiting IRF3 Activation.

RNF138 Downregulates Antiviral Innate Immunity by Inhibiting IRF3 Activation.
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DOI:
10.3390/ijms242216110
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发表时间:
2023-11-09
影响因子:
5.6
通讯作者:
--
中科院分区:
生物学2区
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病毒感染激活转录因子IRF 3和NF-κB,其协同诱导I型干扰素(IFN)。在这里,我们确定了E3泛素连接酶RNF 138作为病毒触发的IRF 3激活和IFN-β诱导的重要负调节因子。RNF 138的过表达抑制了病毒诱导的IRF 3的激活和IFNB 1基因的转录,而RNF 138的敲除促进了病毒诱导的IRF 3的激活和IFNB 1基因的转录。我们进一步发现,RNF 138促进PTEN的泛素化,随后抑制PTEN与IRF 3的相互作用,这对于IRF 3的PTEN介导的核转位是必需的,从而抑制IRF 3输入到细胞核中。我们的研究结果表明,RNF 138通过抑制PTEN与IRF 3的相互作用来负调节病毒触发的信号传导,这些数据为细胞抗病毒反应的分子机制提供了新的见解。
A viral infection activates the transcription factors IRF3 and NF-κB, which synergistically induces type I interferons (IFNs). Here, we identify the E3 ubiquitin ligase RNF138 as an important negative regulator of virus-triggered IRF3 activation and IFN-β induction. The overexpression of RNF138 inhibited the virus-induced activation of IRF3 and the transcription of the IFNB1 gene, whereas the knockout of RNF138 promoted the virus-induced activation of IRF3 and transcription of the IFNB1 gene. We further found that RNF138 promotes the ubiquitination of PTEN and subsequently inhibits PTEN interactions with IRF3, which is essential for the PTEN-mediated nuclear translocation of IRF3, thereby inhibiting IRF3 import into the nucleus. Our findings suggest that RNF138 negatively regulates virus-triggered signaling by inhibiting the interaction of PTEN with IRF3, and these data provide new insights into the molecular mechanisms of cellular antiviral responses.
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