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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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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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通过设计的激动因子诱导HER2-FGFR近距离的直接细胞重编程.

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    科学领域:

    • 细胞生物学 细胞生物学
    • 生物化学 生物化学
    • 再生医学是一种再生医学.

    背景情况:

    • 增长因子信号通路控制细胞命运.
    • 受体二分化和激活是这些途径的关键.
    • 针对新型受体对提供了一种设计细胞身份的方法.

    研究的目的:

    • 研究用于细胞重编程的新设计合成配体 (Novokines).
    • 探索诱导新型受体对,特别是HER2和FGF受体之间的接近的潜力.
    • 评估工程受体信号传导用于细胞命运工程和再生的治疗能力.

    主要方法:

    • 合成配体 (诺诺基因) 的新设计.
    • 使用FRET测试来确认受体接近.
    • 采用蛋白质组分析来识别下游信号.
    • 在体外评估肌原分化和肌纤维形成.

    主要成果:

    • 一个合成的连接体H2F成功诱导了HER2和FGF受体之间的接近.
    • H2F表现出强大的信号活动,将纤维细胞重编程为肌细胞.
    • H2F选择性地激活了MAPK通路,绕过了PLCγ介导的Ca2+信号传递.
    • H2F治疗促进了来自患者的肌细胞的显著肌纤维形成.

    结论:

    • 合成受体配对可以设计为重新连接细胞信号输出.
    • 诺诺基因为细胞命运工程提供了一个可编程的平台.
    • 工程受体相互作用可以驱动再生,在治疗肌体发生学中具有潜在的应用.