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相关概念视频

Circadian Rhythms and Gene Regulation02:19

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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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Aging01:26

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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A Suppressor Screen for the Characterization of Genetic Links Regulating Chronological Lifespan in Saccharomyces cerevisiae
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表观遗传时钟和程序化的衰老.

David Gems1, Roop Singh Virk1, João Pedro de Magalhães2

  • 1Institute of Healthy Ageing, and Research Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, United Kingdom.

Ageing research reviews
|October 16, 2024
PubMed
概括
此摘要是机器生成的。

甲基化钟显示衰老是一种发育过程,与控制发育的基因有关. 这个新的领域,发育老年学,探索衰老.

关键词:
衰老的衰老 衰老的衰老发展发展发展 发展发展表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.超功能的高功能的功能.甲基化时钟是指甲基化时钟.编程理论是编程理论.

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Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
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科学领域:

  • 表观遗传学和老年学
  • 发展生物学 发展生物学
  • 进化生物学 进化生物学

背景情况:

  • 甲基化时钟是物种生物年龄的关键指标.
  • 衰老的潜在生物机制和这些时钟仍然在很大程度上是未知的.
  • 线索表明衰老,甲基化钟和发育过程之间存在联系,特别是霍克斯基因和多基因.

研究的目的:

  • 在程序式衰老理论中提出理解甲基化时钟的框架.
  • 探索甲基化钟的演变及其在衰老和疾病中的作用.
  • 引入发育老年学 (devo-gero) 作为一个新的跨学科领域.

主要方法:

  • 审查和综合程序式衰老理论的最新进展.
  • 融合了进化生物学,生物菌学和发育生物学概念.
  • 基于甲基化时钟特性和devo-gero原则制定新的假设.

主要成果:

  • 甲基化时钟可以被理解为发展衰老过程中不可或缺的一部分.
  • 多基因可能会调节早期发育忠诚度和以后的可塑性之间的权衡.
  • 一个进化保守的发育序列影响了衰老的进化.

结论:

  • 发育老年学提供了一个关于衰老的新视角.
  • 甲基化时钟提供了关于衰老和晚年疾病的发育基础的见解.
  • 了解这种保存的发育序列对于衰老研究至关重要.