関連する実験動画
Updated: Aug 11, 2026
12:19
Analysis of Cell Cycle Position in Mammalian Cells
Published on: January 21, 2012
哺乳類の線維芽細胞におけるG1のサイクリン依存的調節
1Department of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98104.
Science (New York, N.Y.)
|March 26, 1993
まとめ
哺乳類の細胞におけるサイクリンE過剰発現は,G1相期間を短縮することによって,細胞サイクル進行を加速する. これは,サイクリンレベルが細胞増殖の重要な調節体であり,生理学的信号に反応することを示唆しています.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- ユカリオット細胞の増殖のコミットメントは,G1フェーズで発生します.
- 芽生える酵母のコミットメントには,CDC28キナーゼとサイクリン結合が含まれています.
- 高級エウカリオットのG1進行には,関連するキナーゼが必要である.
研究 の 目的:
- 哺乳類の細胞におけるG1進行の制御におけるサイクリンの役割を調査する.
- サイクリン濃度がG1進行の速度を制限しているかどうかを判断する.
主な方法:
- ヒトサイクリンEを過剰発現する線維芽細胞の構造.
- G1/Sトランジションのための細胞サイクル期間,細胞サイズ,および血清要求の分析.
主要な成果:
- 構成的なサイクリンE過剰発現はG1期間を短縮した.
- 過剰発現は細胞サイズ減少につながった.
- G1からS相への移行に必要な血清量は減少した.
結論:
- サイクリン濃度は,哺乳類の細胞におけるG1進行の速度を制限する.
- サイクリン合成は,細胞増殖を制御する生理学的信号の潜在的な標的である.
関連する概念動画
01:45Positive Regulator Molecules
To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
01:23Negative Regulator Molecules
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
02:39Positive Regulator Molecules
Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
02:34Inhibition of Cdk Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
02:34Inhibition of CDK Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
01:28The 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...
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...