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Embryonic Stem Cells00:58

Embryonic Stem Cells

25.9K
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.
25.9K
Cleavage and Blastulation01:33

Cleavage and Blastulation

42.5K
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.
42.5K
Zygotic Development And Stem Cell Formation01:10

Zygotic Development And Stem Cell Formation

6.4K
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...
6.4K
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

4.5K
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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Updated: May 6, 2026

Derivation of Human Embryonic Stem Cells by Immunosurgery
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Derivation of Human Embryonic Stem Cells by Immunosurgery

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単一のブラストメアから派生したヒト胚性幹細胞系.

Irina Klimanskaya1, Young Chung, Sandy Becker

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

Nature
|August 25, 2006
PubMed
まとめ

現在,ヒト胚性幹細胞 (hES) は単一のブラストメアから得ることができ,これは移植前の遺伝子診断 (PGD) と互換性のある方法である. この画期的な発見は,胚を破壊することなく,幹細胞系を生成する方法を提供します.

科学分野:

  • 生殖生物学 生殖生物学
  • 幹細胞の研究についてです.
  • 遺伝学 遺伝学とは

背景:

  • 現在のヒト胚性幹細胞 (hES) 派生は,胚の破壊を必要とする.
  • 植入前の遺伝子診断 (PGD) は,単細胞胚生検を伴うもので,潜在的に胚を節約することができます.

研究 の 目的:

  • 単一ブラストメアからhES細胞を導出する可能性を実証する.
  • 胚の破壊を回避する幹細胞生成の方法を確立する.

主な方法:

  • ヒト胚からの単一ブラストメア生検のためのマイクロ操作技術.
  • バイオプシーしたブラストメアを培養して幹細胞系を導出する.
  • 多能性と安定性について,派生幹細胞系を特徴づける.

主要な成果:

  • シングルブラストメアから2つの安定したhES細胞系を成功裏に導出しました.
  • 派生hES細胞は,8ヶ月以上無差別に増殖した.
  • 確認されたhES細胞の多能性および正常なカリオタイプ,すべての3つの生殖層に差異化する可能性.

結論:

  • hES細胞は単一のブラストメアから派生することができ,胚破壊の代替案を提供します.

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  • この方法は,倫理的な幹細胞生成をサポートし,患者にマッチングされた治療法の可能性を高めます.
  • この技術はPGDと互換性があり,同時に遺伝子検査と幹細胞の誘導を可能にします.