保持与冬眠相关的非编码 cis 元素调节小鼠的代谢和行为适应
Susan Steinwand1, Cornelia Stacher Hörndli1, Elliott Ferris1
1Department of Neurobiology, University of Utah, Salt Lake City, UT, USA.
概括
鉴定了与哺乳动物冬眠和代谢灵活性相关的保存的 cis- 调节元件 (CREs). 在小鼠中删除单个CREs改变了基因表达,影响了新陈代谢,和肥胖.
科学领域:
- 基因组学
- 进化生物学
- 代谢研究
背景情况:
- 细胞调节元件 (CREs) 对表型多样性至关重要,但它们与功能之间的因果关系尚未完全理解.
- 与哺乳动物冬眠和代谢灵活性相关的保存CREs为进化适应提供了洞察力.
研究的目的:
- 阐明在哺乳动物冬眠和代谢灵活性进化过程中所涉及的保存CREs的功能.
- 研究CREs之间的因果关系及其对基因表达和代谢过程的下游影响.
主要方法:
- 基因组分析以识别冬眠期变化的拓相关域 (TAD),重点关注脂肪质量和肥胖 (Fto) 位点.
- 在TAD中识别与邻近基因形成调节接触的遗传回路和冬眠相关的CREs.
- 在小鼠中试验删除单个CREs以评估它们对基因表达和生理特征的影响.
主要成果:
- 包括Fto位点在内的TAD显示了冬眠者融合进化变化的丰富性.
- 确定了与冬眠和代谢反应相关的遗传回路和CRE,与相邻基因形成调节接触.
- 在小鼠中删除特定的CREs导致Fto,Irx3和Irx5表达的差异性改变,影响下游基因程序,新陈代谢,,肥胖发生和食.
结论:
- 冬眠者中的融合进化突出了代谢控制的功能遗传机制.
- 单个CREs可以编码多种调节效应,影响各种生理过程,如新陈代谢,冬眠和肥胖.
- 这项研究为了解CREs如何为适应性表型进化做出贡献提供了一个框架.
相关概念视频
Multi-species Conserved Sequences
4.3K
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
4.3K
Circadian Rhythms and Gene Regulation
4.1K
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...
4.1K
Cis-regulatory Sequences
3.1K
3.1K


