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ZNRF3 promotes Wnt receptor turnover in an R-spondin-sensitive manner

机译:ZNRF3以R-spondin敏感的方式促进Wnt受体更新

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摘要

R-spondin proteins strongly potentiate Wnt signalling and function as stem-cell growth factors. Despite the biological and therapeutic significance, the molecular mechanism of R-spondin action remains unclear. Here we show that the cell-surface transmembrane E3 ubiquitin ligase zinc and ring finger 3 (ZNRF3) and its homologue ring finger 43 (RNF43) are negative feedback regulators of Wnt signalling. ZNRF3 is associated with the Wnt receptor complex, and inhibits Wnt signalling by promoting the turnover of frizzled and LRP6. Inhibition of ZNRF3 enhances Wnt/p-catenin signalling and disrupts Wnt/planar cell polarity signalling in vivo. Notably, R-spondin mimics ZNRF3 inhibition by increasing the membrane level of Wnt receptors. Mechanistically, R-spondin interacts with the extracellular domain of ZNRF3 and induces the association between ZNRF3 and LGR4, which results in membrane clearance of ZNRF3. These data suggest that R-spondin enhances Wnt signalling by inhibiting ZNRF3. Our study provides new mechanistic insights into the regulation of Wnt receptor turnover, and reveals ZNRF3 as a tractable target for therapeutic exploration.%R-sporldin蛋白是分泌出的分子,起干细胞生长因子的作用,通过结合LGR4家族的受体来增强wnt信号作用,但它们的精确作用机制仍不清楚。在这项研究中,“跨膜E3泛素连接酶”ZNRF3被发现是Wrlt信号作用的一个抑制因子,通过促进Wnt受体的周转来发挥作用。R—sporldin通过在一个依赖于LGR4的机制中抑制ZNRF3来增强Wrlt信号作用,从而导致Wnt受体的积累。鉴于Wnt信号作用在癌症中的重要性,ZNRF3也许是治疗干预的个目标。
机译:R-spondin蛋白强烈增强Wnt信号转导,并起干细胞生长因子的作用。尽管具有生物学和治疗意义,但R-spondin作用的分子机制仍不清楚。在这里,我们显示细胞表面跨膜E3泛素连接酶锌和无名指3(ZNRF3)及其同源无名指43(RNF43)是Wnt信号的负反馈调节剂。 ZNRF3与Wnt受体复合物相关,并通过促进毛躁和LRP6的更新来抑制Wnt信号传导。 ZNRF3的抑制增强体内Wnt / p-catenin信号传导并破坏Wnt /平面细胞极性信号传导。值得注意的是,R-spondin通过增加Wnt受体的膜水平来模拟ZNRF3抑制。机械上,R-spondin与ZNRF3的胞外域相互作用,并诱导ZNRF3和LGR4之间的缔合,从而导致ZNRF3的膜清除。这些数据表明R-spondin通过抑制ZNRF3增强Wnt信号传导。我们的研究为Wnt受体转换的调控提供了新的机制学见解,并揭示了ZNRF3作为治疗性探索的可治疗靶标。%R-sporldin蛋白是分泌出的分子,起干细胞生长因子的作用,通过结合LGR4家族的受体在此研究中,“跨膜E3泛素连接酶” ZNRF3被发现是Wrlt信号作用的一个抑制因子,通过促进Wnt受体的周转R-sporldin通过在一个依赖于LGR4的机制中抑制ZNRF3来增强Wrlt信号作用,从而导致Wnt受体的积累。由于Wnt信号作用在癌症中的后果,ZNRF3也许是治疗干预的个目标。

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  • 来源
    《Nature》 |2012年第7397期|p.195-200a1|共7页
  • 作者单位

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA,AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451,USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, Novartis Pharma AG, Postfach CH-4002 Basel, Switzerland;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, Novartis Pharma AG, Postfach CH-4002 Basel, Switzerland;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Department of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

    Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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