RIG-I: a multifunctional protein beyond a pattern recognition receptor.

RIG-I: a multifunctional protein beyond a pattern recognition receptor.
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RIG-I:一种超越模式识别受体的多功能蛋白质

DOI:
10.1007/s13238-017-0431-5
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发表时间:
2018-03
期刊:
影响因子:
21.1
通讯作者:
Shao JZ
Shao JZ
中科院分区:
生物学1区
文献类型:
--
作者:
Xu XX;Wan H;Nie L;Shao T;Xiang LX;Shao JZ

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视黄酸诱导基因I(retinoic acid inducible gene I,RIG-I)作为一种胞质模式识别受体,通过检测外源性病毒RNA启动先天性抗病毒免疫。然而,最近的研究表明,RIG-I通过在不同的情况下感应内源性RNA参与其他各种细胞活动。例如,RIG-I促进乳腺癌细胞的治疗抗性和扩增,并通过在某些情况下识别非编码RNA和内源性逆转录病毒,通过干扰素信号传导激活促进T细胞非依赖性B细胞激活。而在肝细胞癌和急性髓性白血病中,RIG-I分别通过与STAT 1竞争性结合以增强STAT 1的激活,或通过与Src直接相互作用以抑制AKT-mTOR信号通路而发挥肿瘤抑制作用。这些新发现表明,RIG-I在各种细胞生命活动中发挥着比以前已知的更多样化的作用,如细胞增殖和分化。总之,RIG-I的功能远远超过模式识别受体。
It was widely known that retinoic acid inducible gene I (RIG-I) functions as a cytosolic pattern recognition receptor that initiates innate antiviral immunity by detecting exogenous viral RNAs. However, recent studies showed that RIG-I participates in other various cellular activities by sensing endogenous RNAs under different circumstances. For example, RIG-I facilitates the therapy resistance and expansion of breast cancer cells and promotes T cell-independent B cell activation through interferon signaling activation by recognizing non-coding RNAs and endogenous retroviruses in certain situations. While in hepatocellular carcinoma and acute myeloid leukemia, RIG-I acts as a tumor suppressor through either augmenting STAT1 activation by competitively binding STAT1 against its negative regulator SHP1 or inhibiting AKT-mTOR signaling pathway by directly interacting with Src respectively. These new findings suggest that RIG-I plays more diverse roles in various cellular life activities, such as cell proliferation and differentiation, than previously known. Taken together, the function of RIG-I exceeds far beyond that of a pattern recognition receptor.
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