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Evidence that stem cells reside in the adult Drosophila midgut epithelium

机译:干细胞存在于果蝇中肠上皮中的证据

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摘要

Adult stem cells maintain organ systems throughout the course of life and facilitate repair after injury or disease(1). A fundamental property of stem and progenitor cell division is the capacity to retain a proliferative state or generate differentiated daughter cells(2); however, little is currently known about signals that regulate the balance between these processes. Here, we characterize a proliferating cellular compartment in the adult Drosophila midgut. Using genetic mosaic analysis we demonstrate that differentiated cells in the epithelium arise from a common lineage. Furthermore, we show that reduction of Notch signalling leads to an increase in the number of midgut progenitor cells, whereas activation of the Notch pathway leads to a decrease in proliferation. Thus, the midgut progenitor's default state is proliferation, which is inhibited through the Notch signalling pathway. The ability to identify, manipulate and genetically trace cell lineages in the midgut should lead to the discovery of additional genes that regulate stem and progenitor cell biology in the gastrointestinal tract.
机译:成年干细胞在整个生命过程中维持器官系统,并促进受伤或疾病后的修复(1)。干细胞和祖细胞分裂的基本特性是保持增殖状态或生成分化的子细胞的能力(2)。然而,目前对于调节这些过程之间平衡的信号知之甚少。在这里,我们表征成年果蝇中肠中增殖的细胞室。使用遗传镶嵌分析,我们证明了上皮细胞中的分化细胞来自共同谱系。此外,我们表明Notch信号的减少导致中肠祖细胞数量的增加,而Notch途径的激活导致增殖的减少。因此,中肠祖细胞的默认状态是增殖,其通过Notch信号传导途径被抑制。鉴定,操纵和遗传追踪中肠细胞谱系的能力应导致发现调节胃肠道干细胞和祖细胞生物学的其他基因。

著录项

  • 来源
    《Nature》 |2006年第7075期|p. 475-479|共5页
  • 作者

    Micchelli CA; Perrimon N;

  • 作者单位

    Harvard Univ, Sch Med, Dept Genet, Boston, MA 02115 USA;

    Harvard Univ, Sch Med, Howard Hughes Med Inst, Boston, MA 02115 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
  • 中图分类 自然科学总论;
  • 关键词

    SELF-RENEWAL; DIFFERENTIATION; NOTCH;

    机译:自我更新;差异化;提示;

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