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関連する概念動画

Lineage Commitment01:21

Lineage Commitment

Commitment is the  process whereby stem cells:
Cells Coordinate Growth and Proliferation02:36

Cells Coordinate Growth and Proliferation

Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Maintenance of the ES Cell State01:14

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...
Molecular Factors Affecting Cell Division01:27

Molecular Factors Affecting Cell Division

Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...
The Cell Cycle Control System01:28

The Cell Cycle Control System

The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...

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Updated: Jul 6, 2026

Sealable Femtoliter Chamber Arrays for Cell-free Biology
13:44

Sealable Femtoliter Chamber Arrays for Cell-free Biology

Published on: March 11, 2015

ストキャスティシティと細胞の運命

Richard Losick1, Claude Desplan

  • 1Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA.

Science (New York, N.Y.)
|April 5, 2008
PubMed
まとめ
この要約は機械生成です。

細胞の運命を決定する決定は,系統や信号によって影響される決定的,またはランダムに発生するストキャスティックである可能性があります. この研究では,様々な生物におけるストキャスティック細胞の微分化の利点と必要性を調査しています.

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Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
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Stencil Micropatterning of Human Pluripotent Stem Cells for Probing Spatial Organization of Differentiation Fates
08:07

Stencil Micropatterning of Human Pluripotent Stem Cells for Probing Spatial Organization of Differentiation Fates

Published on: June 17, 2016

関連する実験動画

Last Updated: Jul 6, 2026

Sealable Femtoliter Chamber Arrays for Cell-free Biology
13:44

Sealable Femtoliter Chamber Arrays for Cell-free Biology

Published on: March 11, 2015

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
12:02

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols

Published on: June 6, 2017

Stencil Micropatterning of Human Pluripotent Stem Cells for Probing Spatial Organization of Differentiation Fates
08:07

Stencil Micropatterning of Human Pluripotent Stem Cells for Probing Spatial Organization of Differentiation Fates

Published on: June 17, 2016

科学分野:

  • 発達生物学 発達生物学とは
  • 細胞生物学 細胞生物学
  • 遺伝学 遺伝学とは

背景:

  • 細胞の分化は生命にとって根本的なものであり,特殊な細胞サブタイプを可能にします.
  • 細胞が特定の運命をどのように獲得するかを理解することは,発達生物学における重要な課題です.
  • 細胞運命を決定することは,しばしば系統または誘導的信号に基づいた決定的と見なされます.

研究 の 目的:

  • ストキャスティック細胞の分化現象を調査する.
  • ストキャスティシティのメカニズム的要件と進化上の利点を探求する.
  • ランダムな細胞運命の選択が,特定の文脈においてなぜ重要なのかを理解する.

主な方法:

  • 細胞の分化におけるストキャスティックプロセスの文献レビューと理論的分析.
  • バクテリアから人間まで,さまざまな生物におけるストキャスティシティの比較分析.
  • 個体,コロニー,種レベルでストキャスティシティの利点の投機的なモデリング.

主要な成果:

  • ストキャスティック細胞の分化が様々な生物で起きていることを確認した.
  • ストキャスティシティは,環境や歴史的要因とは無関係に動作することを強調した.
  • ストキャスティシティには重要なメカニズム的な基盤があることを示唆した.

結論:

  • ストカスティック細胞の微分化は,さまざまな利点を持つ重要な生物学的プロセスです.
  • 細胞がランダムな運命を選択する能力は,生存と進化にとって極めて重要です.
  • 細胞運命を決定するストキャスティシティのメカニズムと影響を完全に解明するために,さらなる研究が必要です.