在内皮细胞中通过线粒体RNA调节核转录
Kiran Sriram1,2, Zhijie Qi3, Dongqiang Yuan1
1Department of Diabetes Complications and Metabolism, City of Hope, Duarte, United States.
eLife
|January 22, 2024
概括
线粒体RNAs (mtRNAs) 作为mt-caRNAs附着于核基因组,影响基因表达和细胞粘附. 这一发现揭示了细胞压力和疾病中线粒体核通信的新机制.
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.
- 线粒体生物学 线粒体生物学
- 分子生物学分子生物学
背景情况:
- 染色体关联RNAs (caRNAs) 是从核基因组转录的表观遗传调节剂.
- 线粒体RNAs (mtRNAs) 在核基因组调节中的作用在很大程度上尚未被探索.
研究的目的:
- 研究与核基因组相关联的线粒体RNAs (mtRNAs) 的存在和功能.
- 探索这些mt-caRNAs在细胞应激反应和疾病中的作用,特别是在内皮细胞中.
主要方法:
- 利用一种新的测试来检测caRNA及其基因组关联.
- 分析了四种人类细胞类型,重点关注环境压力下的内皮细胞 (ECs).
- 采用基因沉默技术来评估mt-caRNAs的功能影响.
主要成果:
- 确定了与核基因组 (mt-caRNAs) 附着的线粒体RNA,首选在促进子区域.
- 证明EC中的mt-caRNA促进体附着受糖尿病模拟环境压力调节.
- 表明抑制非编码mt-caRNA减弱了压力诱导的核转录,并消除了ECs中的单细胞粘附.
- 观察到糖尿病捐赠者的EC中mtRNAs的核局部增加.
结论:
- mt-caRNAs代表了一种来自线粒体的新型caRNAs类.
- 这些mt-caRNAs在线粒体-核通信中起着至关重要的作用,影响核基因转录和细胞对压力的反应.
- mtRNA以疾病依赖的方式转移到细胞核,这表明它们与糖尿病等病理有关.
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