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Opposing microRNA families regulate self-renewal in mouse embryonic stem cells

机译:相反的microRNA家族调节小鼠胚胎干细胞的自我更新

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摘要

When embryonic stem cells (ESCs) differentiate, they must both silence the ESC self-renewal program and activate new tissue-specific programs. In the absence of DGCR8 (Dgcr8~(-/-)), a protein required for microRNA (miRNA) biogenesis, mouse ESCs are unable to silence self-renewal. Here we show that the introduction of let-7 miRNAs-a family of miRNAs highly expressed in somatic cells-can suppress self-renewal in Dgcr8~(-/-) but not wild-type ESCs. Introduction of ESC cell cycle regulating (ESCC) miRNAs into the Dgcr8~(-/-) ESCs blocks the capacity of let-7 to suppress self-renewal. Profiling and bioinformatic analyses show that let-7 inhibits whereas ESCC miRNAs indirectly activate numerous self-renewal genes. Furthermore, inhibition of the let-7 family promotes de-differentiation of somatic cells to induced pluripotent stem cells. Together, these findings show how the ESCC and let-7 miRNAs act through common pathways to alternatively stabilize the self-renewing versus differentiated cell fates.
机译:当胚胎干细胞(ESC)分化时,它们必须沉默ESC自我更新程序并激活新的组织特定程序。在缺少microCR(miRNA)生物发生所需的蛋白质DGCR8(Dgcr8〜(-/-))的情况下,小鼠ESC无法沉默自我更新。在这里,我们表明引入let-7 miRNAs(在体细胞中高度表达的miRNA家族)可以抑制Dgcr8〜(-/-)中的自我更新,但不能抑制野生型ESC。将ESC细胞周期调控(ESCC)miRNA引入Dgcr8〜(-/-)ESC中会阻断let-7抑制自我更新的能力。分析和生物信息学分析表明,let-7具有抑制作用,而ESCC miRNA间接激活了许多自我更新基因。此外,let-7家族的抑制作用促进了体细胞向诱导多能干细胞的去分化。这些发现共同表明,ESCC和let-7 miRNA如何通过共同途径起作用,以交替稳定自我更新和分化细胞的命运。

著录项

  • 来源
    《Nature》 |2010年第7281期|621-626|共6页
  • 作者单位

    The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Center for Reproductive Sciences, Program in Biomedical Sciences, California 94143, USA Department of Urology, University of California San Francisco, San Francisco, California 94143, USA;

    The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Center for Reproductive Sciences, Program in Biomedical Sciences, California 94143, USA Department of Urology, University of California San Francisco, San Francisco, California 94143, USA;

    The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Center for Reproductive Sciences, Program in Biomedical Sciences, California 94143, USA Department of Urology, University of California San Francisco, San Francisco, California 94143, 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);
  • 原文格式 PDF
  • 正文语种 eng
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