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相关概念视频

Embryonic Stem Cells00:58

Embryonic Stem Cells

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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.
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Cleavage and Blastulation01:33

Cleavage and Blastulation

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After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller.
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Zygotic Development And Stem Cell Formation01:10

Zygotic Development And Stem Cell Formation

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The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
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Source And Potency Of Stem Cells01:27

Source And Potency Of Stem Cells

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Stem cells are undifferentiated cells with extensive self-renewal properties that help them maintain their population during the fetal and adult stages of life. They can specialize in all cell types of the human body. However, their differential potential may vary and can be classified into five types. Stem cells can be (1) Totipotent, (2) Pluripotent, (3) Multipotent, (4) Oligopotent, and (5) Unipotent. Each stem cell has a specific origin; the fertilized egg or zygote is a totipotent cell and...
5.0K
Embryonic Stem Cells00:57

Embryonic Stem Cells

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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...
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相关实验视频

Updated: May 6, 2026

Derivation of Human Embryonic Stem Cells by Immunosurgery
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人类胚胎干细胞系来源于单个芽细胞体.

Irina Klimanskaya1, Young Chung, Sandy Becker

  • 1Advanced Cell Technology, 381 Plantation Street, Worcester, Massachusetts 01605, USA.

Nature
|August 25, 2006
PubMed
概括

人类胚胎干细胞 (hES) 现在可以从单个芽细胞中获得,这是一种与植入前遗传诊断 (PGD) 兼容的方法. 这一突破为产生干细胞系而无需胚胎破坏提供了一种途径.

科学领域:

  • 生殖生物学 生殖生物学
  • 干细胞研究的研究.
  • 遗传学 遗传学 是一个

背景情况:

  • 目前人类胚胎干细胞 (hES) 衍生需要胚胎破坏.
  • 植入前遗传诊断 (PGD) 涉及单细胞胚胎活检,可能节省胚胎.

研究的目的:

  • 为了证明从单个胚芽细胞中获得hES细胞的可行性.
  • 建立一种避免胚胎破坏的干细胞生成方法.

主要方法:

  • 微操纵技术用于从人类胚胎中单个芽细胞体活检.
  • 培养活检的胚芽细胞以获得干细胞系.
  • 衍生干细胞系的多能性和稳定性的表征.

主要成果:

  • 从单个芽细胞体中成功衍生出两个稳定的hES细胞系.
  • 衍生hES细胞维持了不分化的增殖超过八个月.
  • 证实了衍生hES细胞的多能性和正常型,具有分化到所有三个生殖层的潜力.

结论:

  • hES细胞可以从单个芽细胞中衍生出来,为胚胎破坏提供了替代方案.
  • 这种方法支持道德干细胞的产生和患者匹配疗法的潜力.

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  • 该技术与PGD兼容,允许同时进行基因测试和干细胞衍生.