全球体内活体Drosophila RNAi屏幕识别了NOT3作为心脏功能的保守调节器
G Gregory Neely1, Keiji Kuba, Anthony Cammarato
1Institute of Molecular Biotechnology of Austrian Academy of Sciences, Dr. Bohr Gasse 3-5, A-1030 Vienna, Austria.
Cell
|April 8, 2010
概括
一项使用Drosophila的研究确定了参与心脏功能的保存基因. CCR4-Not复合体与心脏缺陷有关,这表明心血管疾病的新治疗点.
科学领域:
- 遗传学 是一个遗传学.
- 心血管生物学 心血管生物学
- 分子生物学分子生物学
背景情况:
- 心脏病是人类死亡的主要原因.
- 了解保存的遗传通路对于识别新型治疗点至关重要.
- 全基因组屏幕提供了一种强大的方法来揭示基本的生物过程.
研究的目的:
- 用Drosophila的全基因组屏幕识别参与心血管功能的进化保存基因和途径.
- 研究CCR4-Not复合体在心脏健康和疾病中的作用.
- 探索Drosophila发现对哺乳动物和人类心脏功能的翻译相关性.
主要方法:
- 心脏特异性RNA干扰 (RNAi) 中介的基因沉默在Drosophila.
- 在压力条件下对7061个进化保存基因进行功能查.
- 果虫心脏的表型分析,包括肌纤维细胞结构和收缩性.
- 基因操纵异合体非3敲击小鼠,以评估心脏功能.
- 对表观遗传修饰的研究,特别是素脱乙酶 (HDAC) 抑制.
- 对人类NOT3单核酸多态 (SNP) 的分析及其与QT间隔的相关性.
主要成果:
- 在Drosophila的全基因组选中,确定了对心血管平衡至关重要的保存途径.
- 突出了CCR4-Not复合体作为一个关键的调节器;它的沉默在Drosophila引起扩张性心肌病和肌纤维细胞失调.
- 在小鼠的哺乳动物骨科 (not3) 功能丧失导致心脏收缩能力受损和心力衰竭易感性.
- 通过抑制HDAC,小鼠的心脏缺陷得到了改善,这表明表观遗传调节的作用.
- 一种常见的人类NOT3 SNP与改变的QT间隔有关,这是心律不整的危险因素.
结论:
- 对于CCR4-Not复合体在跨物种的心脏功能中的保留作用,从Drosophila到人类.
- 由HDACs调节的表观遗传机制与CCR4-非介导的心脏调节有关.
- 这项研究为未来的心血管研究和治疗开发提供了保存基因和途径的宝贵路线图.
- 功能性基因组查在Drosophila是一种有效的策略,用于识别与人类疾病相关的保存哺乳动物基因.
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