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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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Somatic to iPS Cell Reprogramming01:29

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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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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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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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相关实验视频

Updated: Jan 14, 2026

Stem cell-like Xenopus Embryonic Explants to Study Early Neural Developmental Features In Vitro and In Vivo
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在神经ectoderm分化过程中PAX6的复制后初始表达.

Song Hu1,2,3, Rongao Kou4, Zhuojie Su4

  • 1College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China.

The EMBO journal
|October 21, 2025
PubMed
概括

细胞循环的进展对大脑发育至关重要. PAX6基因表达对神经原生细胞 (NPC) 至关重要,发生在DNA复制后,确保正确的细胞命运确定.

关键词:
细胞循环 细胞循环细胞命运决定神经前代细胞 神经前代细胞神经新生是神经发生的过程.转录 翻译 翻译

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科学领域:

  • 发展生物学 发展生物学
  • 分子生物学分子生物学
  • 干细胞生物学 干细胞生物学

背景情况:

  • 多细胞生物的发展依赖于协调的细胞分裂和分化.
  • 转录因子SOX2和PAX6是确定早期神经原生细胞 (NPC) 的关键.
  • 血统特征与细胞循环之间的协调仍然不太清楚.

研究的目的:

  • 研究人类胚胎干细胞 (ESC) 中细胞周期进展和血统特征之间的时间协调.
  • 阐明PAX6表达时间在神经原生细胞 (NPC) 命运决定中的作用.
  • 在早期神经发育期间识别控制细胞周期依赖基因表达的调节机制.

主要方法:

  • 流细胞计和时隔成像,以追踪细胞周期阶段和基因表达.
  • 一个新的PAX6促进器区域的识别和特征.
  • 使用基尿素进行细胞循环停止实验,以评估对PAX6表达和分化的影响.

主要成果:

  • 在人体ESC中神经诱导后,PAX6的表达在细胞周期的G2阶段开始.
  • 一种新型的500bpPAX6促进体驱动G2特异性表达,独立于已知的细胞周期调节剂.
  • 用基尿素阻断S相进展抑制PAX6表达和随后的NPC分化.

结论:

  • NPC命运规范与细胞周期进展密切相关,发生在DNA复制后.
  • 这种复制后血统的承诺确保了对称的细胞分裂,产生具有相同细胞命运的子细胞.
  • 一种新的机制调节PAX6的细胞周期依赖转录,这对神经发育至关重要.