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A molecular programme for the specification of germ cell fate in mice

机译:规范小鼠生殖细胞命运的分子程序

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摘要

Germ cell fate in mice is induced in proximal epiblast cells by the extra-embryonic ectoderm, and is not acquired through the inheritance of any preformed germ plasm. To determine precisely how germ cells are specified, we performed a genetic screen between single nascent germ cells and their somatic neighbours that share common ancestry. Here we show that fragilis, an interferon-inducible transmembrane protein, marks the onset of germ cell competence, and we propose that through homotypic association, it demarcates germ cells from somatic neighbours. Using single-cell gene expression profiles, we also show that only those cells with the highest expression of fragilis subsequently express Stella, a gene that we detected exclusively in lineage-restricted germ cells. The Stella positive nascent germ cells exhibit repression of homeobox genes, which may explain their escape from a somatic cell fate and the retention of pluripotency.
机译:小鼠生殖细胞的命运是由胚外外胚层在近端上皮细胞中诱导的,而不是通过继承任何预先形成的种质而获得的。为了精确确定生殖细胞的指定方式,我们在单个新生生殖细胞与其共有共同祖先的体细胞邻居之间进行了基因筛选。在这里,我们显示脆弱的素,一种干扰素可诱导的跨膜蛋白,标志着生殖细胞能力的开始,并且我们建议通过同型关联来区分体细胞与体细胞邻居。使用单细胞基因表达谱,我们还表明只有那些脆弱类表达水平最高的细胞随后才会表达Stella,这是我们在谱系限制的生殖细胞中唯一检测到的基因。 Stella阳性新生生殖细胞表现出同源异型盒基因的抑制,这可能解释了它们从体细胞命运中逃脱并保留了多能性。

著录项

  • 来源
    《Nature》 |2002年第6895期|p.293-300|共8页
  • 作者单位

    Wellcome Trust/Cancer Research UK Institute of Cancer and Developmental Biology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QR, UK;

  • 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
  • 中图分类 自然科学总论;
  • 关键词

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