Nat Medicine:钱友存等自身免疫性疾病研究取得新突破

2012-07-03 健康所 健康所

中科院上海生命科学研究院/上海交通大学医学院健康科学研究所多年来致力于生物医学转化研究,组织生物学专家与临床医生联合攻关、协同创新,对影响人口健康的重大疾病进行深入研究。钱友存研究员领导的研究组和上海交通大学医学院附属仁济医院风湿病学硏究所所长沈南教授(兼健康所分子风湿病学研究组组长)领导的研究组利用仁济医院丰富的临床资源,以临床发现的核心问题为出发点,发挥各自在自身免疫性疾病研究方面已有的优势,

中科院上海生命科学研究院/上海交通大学医学院健康科学研究所多年来致力于生物医学转化研究,组织生物学专家与临床医生联合攻关、协同创新,对影响人口健康的重大疾病进行深入研究。钱友存研究员领导的研究组和上海交通大学医学院附属仁济医院风湿病学硏究所所长沈南教授(兼健康所分子风湿病学研究组组长)领导的研究组利用仁济医院丰富的临床资源,以临床发现的核心问题为出发点,发挥各自在自身免疫性疾病研究方面已有的优势,又取得重大突破。6月3日,国际顶尖杂志《自然-医学》Nature Medicine(IF=25.43)在线发表了钱友存研究组和沈南研究组共同研究成果:miR-23b抑制IL-17相关的自身免疫疾病。

类风湿关节炎、红斑狼疮、多发性硬化症等常见的风湿性性疾病,近年来在我国乃至全球的发病率逐年攀升。在我国类风湿关节炎患病率为3.6/1000;系统性红斑狼疮为1/1000左右。此类疾病不论是器官特异性的,还是系统性的,都表现出炎症性病理与组织器官损伤特征,目前缺乏非常有效且毒副作用小的特异性的干预治疗手段来早期阻断靶器官损伤进而改善病人的预后。

炎症因子在自身免疫病的病理损伤过程中起着关键作用,病理情况下受累鞄器官对其作用产生效应及相应的调控分子机制尚不清楚,是目前该领域硏究的核心问题。细胞因子白介素-17(IL-17)作为一种重要的炎症介质被认为在多种自身免疫病的组织损伤中发挥着重要作用。然而,IL-17发挥作用的调控机制还不清楚。健康所钱友存研究组近年来在阐明IL-17发挥功能的分子调控机制等研究中取得了显著成果。miRNA作为一种重要的基因表达调控分子,在人类疾病的发生发展中起着重要作用。沈南教授领导的研究组在过去几年中围绕miRNA在以红斑狼疮为代表自身免疫病的发病过程中的作用及其临床应用进行了深入系统的硏究,在囯际上率先阐明多个miRNA 在狼疮关键致病通路中重要调控作用及其与重要靶器官受累的关系。在此基础上,近期,两个课题组合作,博士生朱书和潘文通过分子、细胞生物学、小鼠疾病模型和临床样本分析等多种研究手段,通过高通量microRNA芯片筛选发现了miR-23b是自身免疫病病人(类风湿性关节炎、红斑狼疮)和自身免疫病小鼠模型(CIA、MRL/lpr、EAE)的炎症病理组织中共同下调的microRNA。并且发现IL-17可以通过下调miR-23b的表达来参与炎症性自身免疫病的病理。重要的是,miR-23b对于多种自身免疫疾病模型的发病起到很好的预防及干预作用,有很好的应用前景。机制上,miR-23b通过靶向炎症性细胞因子IL-17、TNFa、IL-1b的下游信号通路中的关键信号分子(TAB2、TAB3、IKKa)来抑制自身免疫病的病理。该项成果得到《自然医学》杂志评审专家的高度推荐,认为该工作首次阐述了非免疫细胞来源的miRNA参与免疫性疾病的机制,认为miR-23b可以成为治疗自身免疫病的一个新靶点,将有可能开发成为有效缓解甚至治愈病症的新药。国际顶级综述杂志《Nature Reviews of Immunology》正在撰文对该研究成果进行研究亮点点评。并且沈南硏究员已接受《Nature Reviews of Rheumatology 》及《Current Opinion of Rheumatology 》主编邀请撰写特邀综述介绍相关系列工作。

这些研究课题获得国家自然科学基金委、国家科技部、中国科学院和上海市科委的经费支持。

doi:10.1038/nm.2815
PMC:
PMID:

The microRNA miR-23b suppresses IL-17-associated autoimmune inflammation by targeting TAB2, TAB3 and IKK-α

Shu Zhu, Wen Pan, Xinyang Song, Yan Liu, Xinrui Shao, Yuanjia Tang, Dong Liang, Dongyi He, Honglin Wang, Wenjun Liu, Yufang Shi, John B Harley, Nan Shen & Youcun Qian

Inflammatory cytokines such as interleukin-17 (IL-17) promote inflammatory autoimmune diseases. Although several microRNAs (miRNAs) have been shown to regulate autoimmune pathogenesis by affecting lymphocyte development and function, the role of miRNAs in resident cells present in inflammatory lesions remains unclear. Here we show that miR-23b is downregulated in inflammatory lesions of humans with lupus or rheumatoid arthritis, as well as in the mouse models of lupus, rheumatoid arthritis or multiple sclerosis. IL-17 downregulates miR-23b expression in human fibroblast-like synoviocytes, mouse primary kidney cells and astrocytes and is essential for the downregulation of miR-23b during autoimmune pathogenesis. In turn, miR-23b suppresses IL-17−, tumor necrosis factor α (TNF-α)− or IL-1β–induced NF-κB activation and inflammatory cytokine expression by targeting TGF-β–activated kinase 1/MAP3K7 binding protein 2 (TAB2), TAB3 and inhibitor of nuclear factor κ-B kinase subunit α (IKK-α) and, consequently, represses autoimmune inflammation. Thus, IL-17 contributes to autoimmune pathogenesis by suppressing miR-23b expression in radio-resident cells and promoting proinflammatory cytokine expression.

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    2012-10-08 jeanqiuqiu
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    2013-05-09 liye789132251
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2012, time=2012-07-05, status=1, ipAttribution=)]
    2013-02-24 ying_wu
  4. 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2012, time=2012-07-05, status=1, ipAttribution=)]
    2013-05-25 zxxiang
  5. 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2012, time=2012-07-05, status=1, ipAttribution=)]
    2013-01-28 kalseyzl
  6. 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  7. 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