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Derivation of Cardiac Progenitor Cells from Embryonic Stem Cells
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从克隆的Cdx2缺陷芽细胞中生成核转移衍生的多能ES细胞
Alexander Meissner1, Rudolf Jaenisch
1Whitehead Institute and Department of Biology, Massachusetts Institute of Technology, Nine Cambridge Center, Cambridge, Massachusetts 02142, USA.
Nature
|October 18, 2005
概括
改变的核转移 (ANT) 产生异常的胚胎细胞,无法植入,但可以产生定制的胚胎干细胞 (ESC). 这项研究验证了ANTT在产生潜在治疗的患者特异性ESC方面.
科学领域:
- 生殖生物学 生殖生物学
- 干细胞生物学 干细胞生物学
- 发育生物学是发展生物学.
背景情况:
- 胚胎干细胞 (ES) 通过核转移衍生提供治疗潜力,但需要胚胎细胞的破坏.
- 定制的核转移衍生ES细胞 (NT-ESCs) 显示出治疗免疫缺陷的前景,最近的人类可行性研究表明.
- 改变核转移 (ANT) 是一种拟议的方法,用于产生非植入性胚胎囊用于ESC衍生.
研究的目的:
- 实验验证改变核转移 (ANT) 的概念,以产生定制胚胎干细胞 (ESC).
- 评估基因改造的胚芽细胞是否无法植入,仍然可以产生多能干细胞.
主要方法:
- 核转移被用来从含有向Cdx2的短发RNA (shRNA) 的供体纤维细胞中创建小鼠胚芽细胞.
- 对生成的克隆芽细胞进行了形态和植入评估.
- 多能胚胎干细胞是从培养中的已扩展的胚芽细胞中衍生出来的.
主要成果:
- 生成的克隆芽细胞表现出异常的形态和缺乏功能性热囊细胞.
- 这些异常芽细胞未能植入子宫,证实了它们的不可活性.
- 尽管有发育缺陷,但胚芽细胞在体外有效地产生了多能胚胎干细胞.
结论:
- 改变核转移 (ANT) 实际上产生了不可植入的胚芽细胞.
- 这种ANT方法成功地产生了定制的胚胎干细胞 (ESC),而无需对可行的胚胎破坏的伦理问题.
- 安特代表了一种可行的策略,用于产生患者特定的ESC,用于再生医学应用.
相关概念视频
Embryonic Stem Cells
Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.
M-Cdk Drives Transition Into Mitosis
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
M-Cdk Drives Transition Into Mitosis
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Embryonic Stem Cells
Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...
Maintenance of the ES Cell State
The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
Methods of Nuclear Reprogramming
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 injury repair.

