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相关概念视频

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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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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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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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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相关实验视频

Updated: Nov 12, 2025

Protocol for Human Blastoids Modeling Blastocyst Development and Implantation
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从人类多能干细胞生成的胚胎状结构

Leqian Yu1,2, Yulei Wei1,3,4, Jialei Duan5

  • 1Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA.

Nature
|March 18, 2021
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概括
此摘要是机器生成的。

研究人员从多能干细胞中开发出人类体,为早期人类发展创造了一个模型. 这些体结构模仿人体胚胎细胞,有助于研究胚胎发生和怀孕障碍.

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科学领域:

  • 发育生物学
  • 干细胞生物学
  • 生殖医学

背景情况:

  • 由于对胚胎的访问受到限制,研究人类胚胎发生受限.
  • 人类多能干细胞为发育研究提供了体外模型.
  • 现有的模型并不完全代表植入前的人类胚胎细胞阶段.

研究的目的:

  • 使用多能干细胞开发植入前人类胚胎细胞模型.
  • 创建一个可扩展和可扰乱的系统来研究早期人类的发展.
  • 调查影响囊胚形成和早期发育缺陷的因素.

主要方法:

  • 在一个三维培养系统中利用了天真的人类多能干细胞.
  • 采用连续的血统分化和自我组织来形成类似胚胎细胞的结构.
  • 使用形态学,细胞计数,血统分配和单细胞RNA测序来表征结构.

主要成果:

  • 在形态,大小,细胞数量和细胞系组成上类似于人体胚胎细胞的"人体胚胎".
  • 通过单细胞RNA测序证明了人类体和胚胎细胞之间的转录组相似性.
  • 可用于干细胞衍生和进一步发展为植入周围结构.

结论:

  • 人类质体为研究早期人类发育和胚胎细胞形成提供了可行的体外模型.
  • 这种模型有助于研究早期怀孕障碍和发育缺陷.
  • 特定的蛋白质激酶C异酶被确定为形成状腔的关键.