Scholarlink

<p>In placental XX females, one X chromosome is silenced during a narrow developmental time window by X-chromosome inactivation, which is mediated by Xist noncoding RNA. Although most X-linked genes are silenced during X-chromosome inactivation, some genes can escape. Here, by increasing its endogenous level, we show that Xist RNA can silence escapees well beyond early embryogenesis both in vitro, in differentiated cells, as well as in vivo, in mouse pre- and post-implantation embryos. We further demonstrate that Xist RNA plays a role in eliminating topologically associating domain-like structures spanning clusters of escapees, and this is dependent on SPEN. The function of Xist in silencing escapees and eliminating topological domains is initially fully reversible, but sustained Xist upregulation leads to irreversible silencing and CpG island DNA methylation of escapees. Thus, gene activity and three-dimensional topology of the inactive X chromosome are directly controlled by Xist, well beyond an early developmental time window.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Escape from X inactivation is directly modulated by Xist noncoding RNA

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月15日

查看全文
  • Antonia Hauth,
  • Jasper Panten,
  • Emma Kneuss,
  • Christel Picard,
  • Nicolas Servant,
  • Isabell Rall,
  • Yuvia A. Pérez-Rico,
  • Lena Clerquin,
  • Nila Servaas,
  • Laura Villacorta,
  • Ferris Jung,
  • Christy Luong,
  • Howard Y. Chang,
  • Judith B. Zaugg,
  • Oliver Stegle,
  • Duncan T. Odom,
  • Edith Heard,
  • Agnese Loda

摘要

In placental XX females, one X chromosome is silenced during a narrow developmental time window by X-chromosome inactivation, which is mediated by Xist noncoding RNA. Although most X-linked genes are silenced during X-chromosome inactivation, some genes can escape. Here, by increasing its endogenous level, we show that Xist RNA can silence escapees well beyond early embryogenesis both in vitro, in differentiated cells, as well as in vivo, in mouse pre- and post-implantation embryos. We further demonstrate that Xist RNA plays a role in eliminating topologically associating domain-like structures spanning clusters of escapees, and this is dependent on SPEN. The function of Xist in silencing escapees and eliminating topological domains is initially fully reversible, but sustained Xist upregulation leads to irreversible silencing and CpG island DNA methylation of escapees. Thus, gene activity and three-dimensional topology of the inactive X chromosome are directly controlled by Xist, well beyond an early developmental time window.