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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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mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

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The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
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PI3K/mTOR/AKT Signaling Pathway01:22

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The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
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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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Updated: Jun 11, 2025

Protocol for Human Blastoids Modeling Blastocyst Development and Implantation
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mTORの活動は,ヒトの芽細胞の発達段階の進行を遅らせます.

Dhanur P Iyer1, Heidar Heidari Khoei2, Vera A van der Weijden3

  • 1Stem Cell Chromatin Group, Department of Genome Regulation, Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany; Institute of Chemistry and Biochemistry, Freie Universität Berlin, 14195 Berlin, Germany.

Cell
|September 27, 2024
PubMed
まとめ
この要約は機械生成です。

人間の細胞は,他の哺乳類と同様に,mTOR経路を調節することによって休眠状態に入ることができます. ヒトの多能幹細胞とブラストイドにおけるこの発見は 生殖療法に意味を持つ.

キーワード:
ブラスト開発ディアパウズ休眠状態人間mTOR について多能幹細胞

さらに関連する動画

Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos
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Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos

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Derivation of Mouse Trophoblast Stem Cells from Blastocysts
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Derivation of Mouse Trophoblast Stem Cells from Blastocysts

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関連する実験動画

Last Updated: Jun 11, 2025

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Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos
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Derivation of Mouse Trophoblast Stem Cells from Blastocysts
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Derivation of Mouse Trophoblast Stem Cells from Blastocysts

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科学分野:

  • 生殖生物学
  • 発達生物学
  • 幹細胞の研究

背景:

  • 哺乳類の胚は,発育を一時停止させ,受胎と産児の最適な状態を同期することができます.
  • ネズミでは,胚性ダイアパウスはmTORシグナル伝達経路によって調節されるが,ヒトではその保存は不明である.

研究 の 目的:

  • ヒトの多能幹細胞 (hPSC) とブラストイドが胚性ダイアパウスのような休眠状態に入るかどうかを調査する.
  • 人間の細胞におけるこの休眠状態の調節におけるmTORシグナル伝達経路の役割を決定する.

主な方法:

  • mTORシグナル伝達経路の活性を下げるために,hPSCとブラストイドを治療した.
  • 細胞増殖,発達進行,子宮内膜細胞への結合能力が評価されました.
  • 休眠状態の可逆性は,機能的および分子レベルで評価されました.

主要な成果:

  • mTORのシグナル伝達が低下すると,hPSCsとブラストイドが休眠状態に入ります.
  • この休眠期は,限られた増殖,発達の進行,子宮内膜細胞の付着によって特徴付けられました.
  • 休眠状態は機能的レベルと分子レベルの両方で逆転することが判明しました.

結論:

  • ヒトの細胞は 他の哺乳類の細胞と同様に ブラストキストの段階で 逆戻り可能な休眠状態に入る能力を持っています
  • mTORシグナル伝達経路の調節は,ヒト細胞におけるこの休眠状態を誘発し,潜在的に逆転させるための鍵です.
  • この発見は,ヒトの生殖治療の進歩に重大な潜在的影響を及ぼします.