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相关概念视频

Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
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,...
Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
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,...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...

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相关实验视频

Updated: Jul 11, 2026

Techniques to Induce and Quantify Cellular Senescence
06:51

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

在发育过程中由线粒体功能指定的行为和衰老速度.

Andrew Dillin1, Ao-Lin Hsu, Nuno Arantes-Oliveira

  • 1Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143-0448, USA.

Science (New York, N.Y.)
|December 10, 2002
PubMed
概括

发育期间的线粒体活动决定了成年人衰老的速度. 降低电子运输链和虫中的腺5'-三酸盐 (ATP) 合成酶活性延长了寿命,显示早期的线粒体功能是关键.

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Age-dependent Dynamics of Locomotion in Caenorhabditis elegans: A Lyapunov Exponent Analysis
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Last Updated: Jul 11, 2026

Techniques to Induce and Quantify Cellular Senescence
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Age-dependent Dynamics of Locomotion in Caenorhabditis elegans: A Lyapunov Exponent Analysis
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科学领域:

  • 老年学是一门学科.
  • 线粒体生物学 线粒体生物学
  • 分子遗传学 分子遗传学

背景情况:

  • 线粒体对于细胞能量生产至关重要,并与衰老有关.
  • 电子输送链 (ETC) 和ATP合成酶是线粒体呼吸的关键组成部分.
  • 了解线粒体功能如何影响衰老对于开发干预措施至关重要.

研究的目的:

  • 为了研究线粒体活动在衰老中的作用,使用Caenorhabditis elegans.
  • 为了确定早期的线粒体功能是否决定成人衰老的表型.
  • 探索调节ETC和ATP合成酶活动对寿命和行为的影响.

主要方法:

  • 利用RNA干扰 (RNAi) 来降低C. elegans中的电子运输链和ATP合成酶活性.
  • 在发育和成年期服用RNAi以评估时间效应.
  • 测量身体尺寸,行为率和成人寿命作为表型结果.

主要成果:

  • 在发育过程中减少ETC和ATP合成酶活性,减少身体大小和行为率.
  • 这些早期生活中的乱显著延长了成年人的寿命.
  • 成年期的干预措施没有改变ATP水平,行为率或寿命,这表明有发育编程效应.

结论:

  • 早期发育期间的线粒体活动建立了成年后呼吸,行为和衰老的持续速度.
  • 发育中的动物的调节系统监测线粒体功能,以设定长期衰老轨迹.
  • 这表明,早期的线粒体健康是寿命和与年龄相关的表型的关键决定因素.