関連する実験動画
Updated: Jul 22, 2026
10:41
Method to Measure Tone of Axial and Proximal Muscle
Published on: December 14, 2011
光ラベル付きチューブリンとアクチンのアクソン内のターンオーバー
1Department of Anatomy and Cell Biology, School of Medicine, University of Tokyo, Japan.
Nature
|February 1, 1990
まとめ
チューブリンやアクチンなどのアクソナルの細胞骨格の成分は動的であり,静的ではありません. 光白化後の光回復は,軸索に沿って連続した集合を示し,軸索輸送の以前の見解に異議を唱えます.
科学分野:
- 神経科学は神経科学である.
- 細胞生物学 細胞生物学
背景:
- 軸索の構造は,マイクロチューブル,神経繊維,アクチンで構成されたダイナミックな細胞骨格に依存しています.
- 軸索内のチューブリンとアクチンのダイナミックな振る舞いを理解することは,軸索を下に輸送されるため,非常に重要です.
研究 の 目的:
- 軸索細胞骨格,特にチューブリンとアクチンのダイナミックな性質を調査する.
- 軸索細胞骨格の静的な構造として被動的輸送を受けているという長年にわたる見解に異議を唱えるため.
主な方法:
- 培養ニューロンにおける光漂白後の光回復 (FRAP) を利用した.
- ニューロンに,その動態を追跡するために,光素とラベルを貼ったチューブリンとアクチンアナログを注入した.
主要な成果:
- チューブリンやアクチンについて,軸索に沿って光白化ゾーンの移動や広がりは観察されなかった.
- 漂白された領域における光の漸進的な回復は,マイクロチューブルとアクチンフィラメントの継続的な組み立てを示した.
結論:
- マイクロチューブルとアクチンフィラメントを含む軸索細胞骨格は,軸索を下に移動する静的な複合体ではありません.
- これらの細胞骨組みの成分は,アクソン全体の長さに沿って連続した組み立てが起こることで,ダイナミックな行動を示します.
関連する概念動画
01:37Rotation with Constant Angular Acceleration - I
If angular acceleration is constant, then we can simplify equations of rotational kinematics, similar to the equations of linear kinematics. This simplified set of equations can be used to describe many applications in physics and engineering where the angular acceleration of a system is constant.
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01:16Rotation with Constant Angular Acceleration - II
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The first...
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01:25Relative Motion Analysis using Rotating Axes
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
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01:29Relative Motion Analysis using Rotating Axes-Problem Solving
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
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01:10Relative Motion Analysis - Acceleration
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01:22Relative Motion Analysis using Rotating Axes - Acceleration
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
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