解锁细胞可塑性:通过抑制原体和细胞外矩阵基因表达调节增强人类iPSC重编程
Jun Yang1, H Karimi Kinyamu1, James M Ward2
1Chromatin and Gene Expression Section, Epigenetics and Stem Cell Biology Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, United States.
Stem cells (Dayton, Ohio)
|June 3, 2024
概括
通过促进细胞可塑性和介质细胞-上皮细胞过渡,PFI-3增强诱导的多能干细胞 (iPSC) 重编程. 这种小分子抑制剂减少了细胞外矩阵基因表达,提高了iPSC生成效率.
科学领域:
- 干细胞生物学 干细胞生物学
- 细胞重新编程的细胞重编程.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 诱导多能干细胞 (iPSC) 重编程需要介质细胞-上皮细胞过渡.
- SWI/SNF复杂子单元 (SMARCA2/4,PBRM1) 是细胞状态转换中的关键调节者.
研究的目的:
- 为了研究PFI-3的作用,SWI/SNF复杂原体的小分子抑制剂,在增强iPSC重编程效率.
- 阐明PFI-3在重编程过程中影响细胞可塑性和基因表达的机制.
主要方法:
- 用PFI-3治疗人类皮肤纤维细胞.
- 对 iPSC 重编程效率的评估.
- 对基因表达的分析,包括E-cadherin和细胞外矩阵 (ECM) 基因.
- 原体类型XIα1 (COL11A1) 的敲除实验.
主要成果:
- 在纤维细胞中,PFI-3治疗诱导了细胞可塑性和介质细胞-上皮细胞过渡.
- 观察到E-cadherin表达的升高,表明一种类似上皮质的状态.
- COL11A1被确定为一个重编程障碍,其淘汰提高了效率.
- PFI-3显著降低了ECM基因的表达,特别是与原组装相关的基因.
结论:
- 通过促进细胞可塑性和促进介质细胞-上皮细胞过渡,PFI-3作为iPSC重编程的增强剂.
- 细胞外矩阵基因表达的调节,特别是原,是PFI-3介导的重编程增强中的关键机制.
- 针对细胞可塑性和ECM组件提供了一个有前途的策略来改善iPSC生成.
相关概念视频
Chromatin Modification in iPS Cells
1.6K
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...
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...
1.6K
Somatic to iPS Cell Reprogramming
2.2K
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...
2.2K
Methods of Nuclear Reprogramming
1.8K
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...
1.8K
Induced Pluripotent Stem Cells
22.6K
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...
22.6K
iPS Cell Differentiation
2.7K
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
2.7K


