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相关概念视频

Methods of Nuclear Reprogramming01:24

Methods of Nuclear Reprogramming

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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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Somatic to iPS Cell Reprogramming01:29

Somatic to iPS Cell Reprogramming

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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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Introduction to Nuclear Reprogramming01:14

Introduction to Nuclear Reprogramming

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Nuclear reprogramming is the process of switching gene expression of one cell type to that of another cell type, usually from a differentiated cell state to an undifferentiated cell state. Differentiation occurs during processes such as development and morphogenesis, tissue regeneration, and malignancy. Cells can also be artificially induced to reprogram their gene expression by techniques such as nuclear transfer, induced pluripotency, and cell fusion. Such techniques have many applications in...
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Induced Pluripotent Stem Cells01:06

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Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
Somatic...
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Induced Pluripotent Stem Cells01:13

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Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
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Chromatin Modification in iPS Cells01:32

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Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
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Kinetic Measurement and Real Time Visualization of Somatic Reprogramming
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通过整合性单细胞计算框架绘制融合驱动的细胞重编程.

Fateme Nazaryabrbekoh1, JoAnne Huang1, Syeda S Shoaib2

  • 1Department of Biological Engineering, Louisiana State University, Baton Rouge, LA, US.

NPJ systems biology and applications
|December 19, 2025
PubMed
概括
此摘要是机器生成的。

细胞融合会产生混合细胞,这些细胞可以迅速重新编程. 最初类似于介质细胞,到第3天它们转变为肌源性状态,表现出动态细胞可塑性并产生细胞多样性.

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科学领域:

  • 细胞生物学 细胞生物学
  • 基因组学就是基因组学.
  • 发展生物学 发展生物学

背景情况:

  • 细胞融合是一种生物过程,将两个或更多细胞合并成单一的混合细胞.
  • 混合细胞具有独特的遗传和表型特征,与母细胞不同.
  • 了解控制细胞融合和随后的重编程的分子机制对于再生医学和发育研究至关重要.

研究的目的:

  • 为了研究合的小鼠心肌细胞 (mHL1) 和介酶干细胞 (mMSC) 中的转录和信号变化.
  • 阐明动态重编程轨迹,并确定控制融合后混合细胞状态的关键监管网络.

主要方法:

  • 对已公布的融合mHL1和mMSC的单细胞RNA测序数据集的分析.
  • 对转录轨迹,基因表达模式和信号通路丰富的生物信息分析.
  • 基因调节网络分析,以确定参与重编程的主调节器.

主要成果:

  • 融合细胞表现出动态的转录轨迹,随着时间的推移迅速变化和稳定.
  • 观察到不对称的可塑性:第一天的杂交体类似于mMSCs (介质细胞重编程),而第三天的杂交体转向mHL1细胞 (肌源性重编程).
  • 显而易见的转录子群体出现,细胞粘附,细胞间通信的动态变化,以及在第3天为抗压和细胞适应增强的途径.

结论:

  • 细胞融合是一种动态的重编程过程,产生新的混合细胞状态.
  • 进化的基因调节和信号网络驱动细胞多样性和细胞融合后的可塑性.
  • 像Hmga2,Arntl和Prrx1这样的关键调节器在介导介酶体到肌原性重编程方面发挥着重要作用.