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相关概念视频

Neurulation01:30

Neurulation

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Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
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Gastrulation01:56

Gastrulation

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Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
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Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal01:22

Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal

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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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Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

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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.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
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Determination01:51

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During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
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相关实验视频

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Generation of Na&#239;ve Blastoderm Explants from Zebrafish Embryos
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NF2对于人类内皮发育至关重要.

Minjin Jeong1,2, Dongjun Han1,2, Preetida Bhetariya3

  • 1Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 8, 2025
PubMed
概括
此摘要是机器生成的。

瘤抑制剂NF2 (类似于moesin-ezrin-radixin) 对于人类内皮的发育至关重要. 失去NF2通过影响YAP1和Hippo通路来阻止内皮的形成.

关键词:
NF2 NF2 是一个字母.一个YAP1一个YAP1它们的内皮和内皮是 endoderm.河马的路径 河马的路径人类诱导的多能干细胞干细胞.

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相关实验视频

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科学领域:

  • 发育生物学是发展生物学.
  • 干细胞生物学 干细胞生物学
  • 癌症生物学 癌症生物学

背景情况:

  • 脊椎动物的胚胎发生依赖于精确的胚胎层规范.
  • NF2瘤抑制基因在发育过程中至关重要,与瘤相关的突变.
  • 在人类胚胎发育中NF2的作用仍然在很大程度上是未知的.

研究的目的:

  • 用诱导多能干细胞研究NF2基因在人类内皮发育中的作用.
  • 阐明NF2影响内皮特异性的分子机制.

主要方法:

  • 利用人类诱导的多能干细胞 (hiPSCs) 进行体外分化研究.
  • 产生的NF2淘汰 (NF2-/-) hiPSCs来评估内皮的形成能力.
  • 分析了基因和蛋白质表达,并进行了体内瘤试验.

主要成果:

  • NF2对于人类内皮的规范是必不可少的;NF2-/- hiPSCs无法形成内皮.
  • 丢失NF2导致YAP1的核转位,抑制了Activin/节点信号传递.
  • 内皮形成被YAP1敲击或NF2重新表达所拯救.

结论:

  • 在胚胎发生过程中,NF2在人类内皮的特异化中起着至关重要的作用.
  • NF2通过YAP1和Hippo通路调节内皮的形成.
  • 这项研究强调了NF2在人类早期发育中的重要性,超出了它在瘤抑制方面的已知作用.