Immunity:发现锰离子是细胞内的天然免疫激活剂和警报素

2018-04-12 佚名 北大生科院

近日,国际免疫学著名学术期刊《Immunity》发表了北京大学生命科学学院蒋争凡研究组在天然免疫领域的最新研究成果——Manganese Increases the Sensitivity of the cGAS-STING Pathway for Double-stranded DNA and Is Required for the Host Defense against DNA Viruse

近日,国际免疫学著名学术期刊《Immunity》发表了北京大学生命科学学院蒋争凡研究组在天然免疫领域的最新研究成果——Manganese Increases the Sensitivity of the cGAS-STING Pathway for Double-stranded DNA and Is Required for the Host Defense against DNA Viruses。

天然免疫是宿主抵抗病原微生物入侵的第一道防线。在抗病毒天然免疫反应中,机体通过cGAS-STING信号通路感受DNA病毒的入侵,继而激活转录因子IRF3/7和NF-κB,产生I型干扰素(IFN)等各种抗病毒细胞因子。另一方面, cGAS-STING信号通路对于抗肿瘤免疫和自身免疫病的形成也有重要作用。

该研究首次发现了一种微量元素可以在机体抵抗感染的天然免疫过程中,发挥警报素(Alarmin)和激活剂(Activator)的双重作用:被感染细胞释放的锰离子通过活化cGAS-STING通路,特异性地调高细胞在感染条件下对病原体的敏感性,因此锰离子在机体抵抗病毒感染的过程中发挥至关重要的作用。本研究为锰元素在体内的生理学功能,特别是作为免疫调节剂的功能研究打开了一个新的窗口。此外,这些发现还揭示了锰元素未来可能在抗感染、抗肿瘤及免疫佐剂等应用方面拥有广阔的前景。

研究工作得到了国家自然科学基金委、科技部国家重点基础研究项目、北京大学“细胞增殖与分化”教育部重点实验室和“蛋白质与植物基因研究”国家重点实验室及北大--清华生命科学联合中心的资助。

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    2021-05-09 小小医者
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    2018-04-21 祝您健康

    学习

    0

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    2018-04-14 飘飘爱

    很好

    0

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除了激活I型干扰素以外,环状双核苷酸还有激活转录因子NF-KB的重要功能。

Sci Rep:王汉中团队发现人博卡病毒可抑制NF-κB信号通路

人博卡病毒(HBoV)是在2005年新发现的一种能够引起婴幼儿肠道和呼吸道感染疾病的病原体。作为一种新发病毒病原,其致病机制和病毒如何逃逸宿主天然免疫识别的分子机制等重要科学问题亟待阐明。天然免疫系统是人体防止病原体入侵的第一道屏障,NF-κB信号通路是天然免疫系统的重要组成部分。近期,中国科学院武汉病毒研究所王汉中研究团队在博卡病毒调控NF-κB信号通路机制方面取得重要进展,揭示了博卡病毒NS1

Nature:保护幼儿抵抗轮状病毒感染的重要肠道免疫机制

这一研究首次报导了肠道内中的Nlrp9b蛋白在识别轮状病毒感染后,参与炎症小体的形成,导致小鼠对于轮状病毒的免疫能力增强。这一研究突出了先天免疫(innate immunity)信号通路,在肠道免疫中起的重要作用,并且可能为未来宿主防御病毒病原体感染的调控中提供有用的靶标。

Nat Commun:徐安龙教授课题组在抗病毒天然免疫领域取得新进展

近期,Nature Communications 在线发表了中山大学生命科学学院徐安龙教授课题组的研究论文“The Role of Alternative Polyadenylation in the Antiviral Innate Immune Response”。该论文对病毒感染后,全基因组水平可选择性多聚腺苷酸化(Alternative Polyadenylation,APA)的现象进行研