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相关概念视频

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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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在体外复制人体体生成

Yoshihiro Yamanaka1, Sofiane Hamidi1, Kumiko Yoshioka-Kobayashi1

  • 1Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan.

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概括
此摘要是机器生成的。

研究人员开发了一种3D干细胞模型,即轴体,用于研究人类的细分和体生. 这种模型准确地捕捉了细分时钟,并显示了视网酸

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科学领域:

  • 发育生物学
  • 干细胞生物学
  • 人类胚胎的形成

背景情况:

  • 脊椎动物的细分对于发育至关重要,但由于人类的局限性,人们对其了解很少.
  • 现有的人类多能干细胞模型在空间和时间上难以准确地总结体生.

研究的目的:

  • 开发一个强大的3D模型来研究人类的细分和体质生成.
  • 调查索米特形成和稳定性的分子机制.
  • 探索这个模型研究先天性脊柱疾病的潜力.

主要方法:

  • 基于多能干细胞的三维模型的开发,称为"axioloid".
  • 对细分时钟的振荡动态,形态和分子特征的分析.
  • 研究包括FGF-WNT和视网膜酸在内的信号通路.
  • 与人类胚胎进行比较分析,并使用患者诱导的多能干细胞.

主要成果:

  • 在实验室中,Axioloid准确地回顾了人类细分时钟动态和体内细胞的形成.
  • 该模型表现出正确的形形和信号梯度 (FGF-WNT,视网膜酸).
  • 视网膜酸信号在细分稳定中起着至关重要的作用,与细胞外基质相互作用.
  • 体与人类胚胎具有很高的相似性,包括霍克斯代码表达.
  • 该模型使用患者衍生的iPSC成功展示了先天性脊柱疾病的疾病建模.

结论:

  • 在实验室内研究人类轴向发育和体内生殖的新平台.
  • 该模型阐明了视网膜酸在体位稳定和上皮质化中的作用.
  • 对于研究人类先天性脊柱疾病的发病和药物查来说,Axioloid具有价值.