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相关概念视频

Aging01:26

Aging

179
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.
Cellular Clock Theory
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...
179
Biological Clocks and Seasonal Responses02:45

Biological Clocks and Seasonal Responses

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The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
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Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

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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

Mitochondria

14.9K
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,...
14.9K
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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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: Sep 9, 2025

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
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基于代谢的衰老时钟

A Ibáñez de Opakua1, R Conde2, A de Diego2

  • 1ATLAS Molecular Pharma, Parque Tecnológico de Bizkaia, Ed. 800, 48160, Derio, Spain.

npj metabolic health and disease
|September 3, 2025
PubMed
概括
此摘要是机器生成的。

分子衰老时钟和基于NMR的新陈代谢时钟可以比时间表更好地预测健康结果. 一种新的方法提高了加速衰老检测的准确性和可解释性.

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科学领域:

  • 生物标志物和健康范围研究
  • 代谢学与衰老科学

背景情况:

  • 分子衰老时钟可以估计生物年龄,
  • 表观遗传,转录组,蛋白组和代谢组钟是关键类型.
  • 基于NMR的代谢表提供非侵入性,高通量代谢健康评估.

研究的目的:

  • 总结现有的基于NMR的新陈代谢时钟模型.
  • 引入一种基于NMR的新方法,用于老化时钟的开发.
  • 提高生物年龄估计的预测准确性和临床解释性.

主要方法:

  • 基于NMR的当前代谢钟文献的审查和综合.
  • 开发一个集成新陈代谢数据的新计算模型.
  • 验证预测加速衰老和疾病风险的模型.

主要成果:

  • 确定了与生物衰老相关的基于NMR的关键代谢特征.
  • 这种新方法对生物年龄具有很高的预测准确性.
  • 该模型成功地识别了特定疾病的代谢扭曲.

结论:

  • 基于NMR的代谢钟是评估代谢健康和生物年龄的宝贵工具.
  • 这种方法提高了老化时钟的临床效用.
  • 这种方法支持风险分层和早期检测加速衰老.