时间:果头的snRNA-seq衰老钟揭示了性别偏见的衰老
Nikolai Tennant1, Ananya Pavuluri2, Kate O'Connor-Giles3,4
1Data Science Institute, Brown University, Providence, RI, USA.
bioRxiv : the preprint server for biology
|February 3, 2025
概括
我们开发了TimeFlies,这是一款针对单细胞的新型转录基因衰老时钟. 该工具识别了关键的衰老生物标志物,包括lncRNA:roX1,并揭示了Drosophila的性别特异性衰老差异.
科学领域:
- 基因组学就是基因组学.
- 衰老研究研究 衰老研究
- 生物信息学是一种生物信息学.
背景情况:
- 现有的表观遗传衰老时钟往往忽略了基因表达数据.
- 转录组钟可以识别新的与年龄相关的基因,但通常会模拟有限的基因子集.
- 需要单细胞转录基因衰老时钟,并将其应用于衰老中的性别差异.
研究的目的:
- 介绍TimeFlies,一个全细胞类型的单细胞RNA测序 (scRNA-seq) 衰老钟,用于Drosophila melanogaster头.
- 利用深度学习基于全基因组基因表达的年龄预测.
- 使用转录基因数据调查衰老途径中的性别差异.
主要方法:
- 开发了TimeFlies,这是一个基于深度学习的scRNA-seq衰老时钟.
- 采用可解释性方法来识别关键生物标志物基因.
- 训练性别特定的TimeFlies模型来分析基于性别的衰老差异.
- 进行了体内实验,以验证生物标记物的功能.
主要成果:
- 从全基因组基因表达特征来,TimeFlies准确地预测了捐赠者的年龄.
- 在预测的衰老生物标志物中,长非编码RNA (lncRNAs) 高度丰富.
- 最重要的生物标志物,lncRNA:roX1,对于X染色体剂量补偿和生存至关重要.
- 在男性和女性的衰老时钟之间观察到显著的差异,表明不同的衰老路径.
结论:
- 时间飞为使用单细胞转录组学进行衰老研究提供了一个强大的工具.
- lncRNA:roX1是Drosophila中关键的衰老生物标志物,影响生存.
- 在男性和女性的衰老过程中,存在着不同的分子通路,这需要进一步的研究.
相关概念视频
01:53RNA Stability
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
01:53RNA Stability
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...