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相关概念视频

Epigenetic Regulation01:37

Epigenetic Regulation

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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.
X-chromosome...
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Aging01:26

Aging

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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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The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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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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Mitochondria01:37

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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,...
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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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相关实验视频

Updated: Jul 5, 2025

A Suppressor Screen for the Characterization of Genetic Links Regulating Chronological Lifespan in Saccharomyces cerevisiae
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使用表观遗传节拍器识别表观遗传衰老调节者.

Colin Farrell1, Chanyue Hu1, Kalsuda Lapborisuth1

  • 1Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, United States.

Frontiers in bioinformatics
|January 18, 2024
PubMed
概括
此摘要是机器生成的。

表观遗传起器 (EPM) 为研究表观遗传衰老加速提供了一个强大的框架,其性能优于传统的DNA甲基化钟. 它准确地模拟了毒素和细胞类型等因素如何影响生物衰老.

关键词:
通过DNA甲基化.衰老的衰老 衰老的衰老这是表观遗传学.表观遗传时钟的时间表.显基因组是一个表观基因组.

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科学领域:

  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
  • 计算生物学 计算生物学
  • 衰老研究研究 衰老研究

背景情况:

  • 表观遗传钟使用DNA甲基化预测时间年龄.
  • 这些时钟用于研究生物衰老加速.
  • 传统的时钟可能无法完全捕捉缓和表观遗传年龄的因素.

研究的目的:

  • 将处罚回归表观遗传钟与进化表观遗传节拍器 (EPM) 框架进行比较.
  • 调查因素如何影响EPM模型中的表观遗传状态.
  • 确定EPM框架是否更好地模拟表观遗传衰老加速.

主要方法:

  • 模拟数据以评估EPM的表观遗传状态与年龄,性别和细胞组成.
  • 分析了汇总的人类数据,以评估EPM的表观遗传状态,按性别和细胞类型进行调节.
  • 检查了聚二 (PBB) 暴露数据,以评估EPM对毒素的反应.

主要成果:

  • 模拟中的表观遗传状态受到年龄,性别和细胞类型组成的影响.
  • 在汇总的人类数据中,表观遗传状态受到性别和细胞类型的调节.
  • 表观遗传状态是由毒素 (PBB暴露) 调节的.

结论:

  • 表观遗传起器 (EPM) 为研究表观遗传衰老加速提供了一个强大的框架.
  • 毒素,性别和细胞类型等因素显著适度表观遗传状态.
  • 传统的线性回归时钟可能会掩盖这些调节因素的影响.