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相关概念视频

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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
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Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
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Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
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Updated: Jun 5, 2025

Mouse Fetal Whole Intestine Culture System for Ex Vivo Manipulation of Signaling Pathways and Three-dimensional Live Imaging of Villus Development
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在怀孕期间RANK驱动结构化肠表皮扩张

Masahiro Onji1,2, Verena Sigl3, Thomas Lendl4

  • 1Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria. masahiro.onji@meduniwien.ac.at.

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概括

怀孕和哺乳期的哺乳动物通过RANK-RANKL通道导致肠道扩张,增加表面积. 这种必要的改造确保了母亲和后代的健康,

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科学领域:

  • 生殖生物学
  • 胃肠病学
  • 细胞和分子生物学

背景情况:

  • 哺乳动物的繁殖包括对母亲和后代福祉的显著生理适应.
  • 肠上皮在这些适应过程中的作用,特别是在怀孕和哺乳期间,仍然不完全理解.

研究的目的:

  • 研究哺乳动物怀孕和哺乳期间导致肠表皮扩张的分子机制.
  • 在繁殖过程中确定调节小形态和肠道表面积的关键途径.

主要方法:

  • 使用小鼠的体内研究,包括基因操纵 (rank缺陷).
  • 使用小鼠和人类肠道器官的体外研究.
  • 分子信号通路的分析,包括核因子-κB (RANK) 和骨形态蛋白 (BMP) 信号的受体激活器.

主要成果:

  • 肠上皮在怀孕和哺乳期间扩张,其特点是新形状.
  • RANK-RANKL通路被确定为小鼠和有机体中这种扩张的关键调节者.
  • RANK-RANKL信号保护肠道上皮细胞,通过BMP信号影响干细胞,并促进状延伸.
  • 孕产妇肠道RANK缺乏导致后代体重下降和葡萄糖不耐受.
  • 构成性RANK的激活会导致肠道扩张,其次是小和干细胞的损失,并抑制瘤的形成.

结论:

  • 在怀孕和哺乳期间,RANK-RANKL是驱动肠表皮扩张的关键途径,这是一个基本的生殖适应.
  • 这一途径对于维持肠道完整性和支持后代发育至关重要,对代谢健康有影响.
  • 了解RANK-RANKL的作用为组织重塑,干细胞调节和潜在的治疗点提供了洞察力.