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相关概念视频

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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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.
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...
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Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response01:15

Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response

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Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
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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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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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Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
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相关实验视频

Updated: Jun 18, 2025

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
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昼夜节律:衰老的一个关键变量?

Patrick R Winterhalter1, Adrian-Iustin Georgevici1,2, Nitin J Gharpure1

  • 1Clinic for Heart Surgery (UMH), Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany.

Aging cell
|July 30, 2024
PubMed
概括
此摘要是机器生成的。

研究衰老的转录变化揭示了昼夜节律 (CiR) 作为关键标志物. 恢复CiR功能可能为与年龄相关的衰退提供治疗机会,并改善健康状况.

关键词:
布莱赫40 (Dec1) 在这个问题上.衰老的标志 衰老的标志昼夜节律是指昼夜节律的节奏.互动互动网络互动网络机器学习是机器学习.鼠标队列的一个群体.器官菌株 性别 性别性激素 性激素 性激素

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Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents
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科学领域:

  • 基因组学和分子生物学
  • 衰老研究研究 衰老研究
  • 系统生物学 系统生物学

背景情况:

  • 了解与年龄相关的转录变化对于健康和寿命至关重要.
  • 以前对老龄化队列的研究由于样本大小,菌株,组织和年龄范围的偏差而面临限制.
  • 确定强大的衰老生物标志物需要全面和广泛适用的方法.

研究的目的:

  • 在各种生物背景中识别具有高一般有效性的共同衰老特征.
  • 研究昼夜节律 (CiR) 和蛋白质稳定在衰老过程中的作用.
  • 探索与年龄有关的疾病的潜在治疗点.

主要方法:

  • 大量RNA测序是在一个包括七个器官,两个菌株,两性和五个年龄点的小鼠队列上进行的.
  • 机器学习,特别是Boruta算法,用于特征选择和老化标志物的识别.
  • 网络分析被用来绘制基因表达特征,并确定关键的相互作用轴,如CiR-蛋白质稳定轴.

主要成果:

  • 循环节律 (CiR) 转录在无监督分析中成为突出的年龄标志物.
  • 确定了四个主要的基因表达特征,其中CiR和蛋白质静止表现出明显的,部分相反的变化.
  • 发现像性激素一样的荷尔蒙影响会调节CiR转录表达,影响衰老调节者.

结论:

  • 昼夜节律 (CiR) 的双边失调是衰老的一个基本方面.
  • CiR转录显示出作为衰老可靠的生物标记物的潜力.
  • 恢复CIR功能是对衰老和相关疾病的有希望的治疗策略.