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相关概念视频

Epigenetic Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Epigenetic Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Epigenetic Regulation01:37

Epigenetic Regulation

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...
Uncertainty: Confidence Intervals00:54

Uncertainty: Confidence Intervals

The confidence interval is the range of values around the mean that contains the true mean. It is expressed as a probability percentage. The interpretation of a 95% confidence interval, for instance, is that the statistician is 95% confident that the true mean falls within the interval. The upper and lower limits of this range are known as confidence limits. The confidence limits for the true mean are estimated from the sample's mean, the standard deviation, and the statistical factor 't,' or...

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相关实验视频

Updated: May 7, 2026

Quantification of Information Encoded by Gene Expression Levels During Lifespan Modulation Under Broad-range Dietary Restriction in C. elegans
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在表观遗传时钟中的不确定性量化通过符合规范的定量回归.

Yanping Li1, Jaclyn M Goodrich2, Karen E Peterson3

  • 1School of Statistics and Data Science, Nankai University, China.

medRxiv : the preprint server for health sciences
|September 16, 2024
PubMed
概括

这项研究引入了一种新的方法,用于表观遗传时钟,使用定量回归和符合性预测. 它提供了更准确的生物年龄预测,并揭示了老龄化模式中的人口差异.

关键词:
通过DNA甲基化.生物年龄 生物年龄符合规范的预测预测表观遗传时钟的时间表.不同质性的异质性儿科 儿科 儿科 儿科

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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.
  • 生物统计学 生物统计学
  • 计算生物学 计算生物学

背景情况:

  • 基因甲基化 (DNAm) 是一种影响生物年龄的关键表观遗传修饰.
  • 基于DNAm的表观遗传钟估计了生物年龄,但往往缺乏不确定性量化.
  • 现有的时钟可以预测平均生物年龄,但不能完全捕捉人口异质性或提供预测间隔.

研究的目的:

  • 开发一种用于训练表观遗传钟的新型管道,其中包括不确定性量化.
  • 为了揭示种群异质性,并为生物年龄构建准确的预测间隔.
  • 为了提高对生物衰老的理解,超出平均估计.

主要方法:

  • 整合高维量子力回归和符合性预测用于表观遗传时钟训练.
  • 开发适用于各种DNAm数据集的通用管道.
  • 适用于来自儿童和青少年的11个DNAm数据集中的728个血液样本.

主要成果:

  • 拟议的方法产生了具有名义覆盖范围的自适应预测间隔,并考虑到个体变化.
  • 基于量子回归的预测间隔比传统平均回归更窄,这表明统计效率有所提高.
  • 间隔揭示了与年龄加速同步的模式,揭示了儿童和青春期衰老中的细胞进化异质性.

结论:

  • 合规化的高维量子力回归为有效的预测间隔提供了强大的框架,并揭示了表观遗传衰老中的人口异质性.
  • 该方法提高了统计效率,并提供了对超出平均值的生物年龄分布的更深入的见解.
  • 这种方法具有广泛的适用性,用于理解跨年龄组的表观遗传年龄,并为抗衰老干预提供信息.