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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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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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多原子钟用于预测小鼠的表型年龄.

Daniel L Vera1,2, Patrick T Griffin3, David Leigh3

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概括

研究人员开发了一种新的老鼠表型年龄模型 (Mouse PhenoAge) 来评估生物衰老. 这种模型准确地预测了小鼠的死亡率和剩余寿命,减少了对广泛生存研究的需求.

关键词:
通过DNA甲基化.代谢学 代谢学 代谢学生物年龄 生物年龄遗传表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表观表脆弱 脆弱 脆弱 脆弱 脆弱

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科学领域:

  • 老年学和衰老研究研究.
  • 发现生物标志物的发现.
  • 在衰老中的动物模型.

背景情况:

  • 生物年龄与时间年龄不同,反映了整体健康和衰老.
  • 现有的生物年龄测量 ("钟") 主要预测时间年龄.
  • 在动物模型中需要复合生物年龄测量,以评估干预和死亡风险.

研究的目的:

  • 开发了第一种对小鼠的综合生物年龄测量方法,称为小鼠表型年龄模型 (Mouse PhenoAge).
  • 使用多原子数据创建鼠标PhenoAge的预测时钟.
  • 为了验证老鼠PhenoAge与剩余寿命的关联.

主要方法:

  • 开发的老鼠PhenoAge基于脆弱性,完整的血液样本,并在一个纵向老鼠队列的死亡风险.
  • 利用多原子数据,包括代谢学和DNA甲基化,构建预测模型.
  • 评估了模型残留量与小鼠剩余寿命之间的关系.

主要成果:

  • 成功开发并验证了Mouse PhenoAge作为小鼠生物年龄的复合衡量标准.
  • 多原子模型准确地预测了老鼠的现象年龄.
  • 模型残留与剩余寿命相关,即使在同一个时间年龄的小鼠中.

结论:

  • 鼠标PhenoAge提供了一种新且准确的方法来评估实验室小鼠的生物衰老和死亡风险.
  • 这些预测模型可以减少对长期和资源密集的生存研究的依赖.
  • 这一进步促进了更有效的衰老研究和小鼠干预测试.