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相关概念视频

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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Chromatin Modification in iPS Cells01:32

Chromatin Modification in iPS Cells

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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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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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相关实验视频

Updated: May 21, 2025

Pooled shRNA Screen for Reactivation of MeCP2 on the Inactive X Chromosome
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Pooled shRNA Screen for Reactivation of MeCP2 on the Inactive X Chromosome

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全基因组沉声器查揭示了关键沉声器调节重编程效率在老鼠诱导的多能干细胞的干细胞.

Xiusheng Zhu1, Lei Huang1, Guoli Li1

  • 1Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Livestock and Poultry Multi-omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 20, 2025
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概括
此摘要是机器生成的。

研究人员在老鼠基因组中发现了数千种新型基因沉默器. 这些对基因抑制至关重要的调节元素是细胞特异的,影响细胞重编程和多能性.

关键词:
这就是SS-STARR-seqq.这些是cis-regulatory元素.具有高通量功率的高通量功率.这些是iPSCs.沉声器是一种沉声器.

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A Simple Method to Identify Kinases That Regulate Embryonic Stem Cell Pluripotency by High-throughput Inhibitor Screening
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RNA-based Reprogramming of Human Primary Fibroblasts into Induced Pluripotent Stem Cells
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相关实验视频

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科学领域:

  • 基因组学就是基因组学.
  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
  • 基因规则 基因规则

背景情况:

  • 小鼠基因组的非编码区域包含调节序列.
  • 激活基因表达的增强剂得到了充分的研究,但基因沉默剂的探索较少.

研究的目的:

  • 首次在小鼠基因组中进行全基因组范围的沉声器识别.
  • 描述这些沉声器的基因组分布,相关基因和功能性质.

主要方法:

  • 在小鼠胚胎纤维细胞 (MEFs) 和胚胎干细胞 (mESCs) 中全基因组识别沉声器.
  • 静音器分布的分析,与基因表达水平的关联,以及转录因子 (TF) 的结合.
  • 研究与静音器相关的基因组修饰 (H3K9me3) 和表观遗传变化的研究.

主要成果:

  • 在MEF中识别了89,596个沉声器,在mESC中确定了115,165个沉声器.
  • 沉声剂分布无处不在,与低表达基因相关,并且细胞特异.
  • 沉声器结合压制性TF,为H3K9me3进行丰富,并且可以根据TF水平切换到增强器功能.
  • 沉声器会影响MEF的诱导效率和mESC的多能性.

结论:

  • 这项研究介绍了鼠标基因组中第一个全面的沉声器景观.
  • 沉声器在调节基因表达和细胞过程中发挥着重要作用,例如重编程和多能性.
  • 已识别的沉声器提供了对基因调节和诱导多能干细胞 (iPSCs) 的发展的洞察.