A global in vivo Drosophila RNAi screen identifies NOT3 as a conserved regulator of heart function.

A global in vivo Drosophila RNAi screen identifies NOT3 as a conserved regulator of heart function.
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DOI:
10.1016/j.cell.2010.02.023
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发表时间:
2010-04-02
期刊:
影响因子:
64.5
通讯作者:
Penninger JM
Penninger JM
中科院分区:
生物学1区
文献类型:
--
作者:
Neely GG;Kuba K;Cammarato A;Isobe K;Amann S;Zhang L;Murata M;Elmén L;Gupta V;Arora S;Sarangi R;Dan D;Fujisawa S;Usami T;Xia CP;Keene AC;Alayari NN;Yamakawa H;Elling U;Berger C;Novatchkova M;Koglgruber R;Fukuda K;Nishina H;Isobe M;Pospisilik JA;Imai Y;Pfeufer A;Hicks AA;Pramstaller PP;Subramaniam S;Kimura A;Ocorr K;Bodmer R;Penninger JM

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Heart diseases are the most common causes of morbidity and death in humans. Using cardiac-specific RNAi-silencing in Drosophila, we knocked-down 7061 evolutionarily conserved genes under conditions of stress. We present a first global road-map of pathways potentially playing conserved roles in the cardiovascular system. One critical pathway identified was the CCR4-Not complex implicated in transcriptional and post-transcriptional regulatory mechanisms. Silencing of the CCR4-Not components in adult Drosophila resulted in myofibrillar disarray and dilated cardiomyopathy. Heterozygous not3 knockout mice showed spontaneous impairment of cardiac contractility and increased susceptibility to heart failure. These heart defects were reversed via inhibition of HDACs suggesting a mechanistic link to epigenetic chromatin remodeling. In humans, we show that a common NOT3 SNP correlates with altered cardiac QT intervals, a known cause of lethal arrhythmias. Thus, our functional genome-wide screen in Drosophila can identify candidates that directly translate into conserved mammalian genes involved in heart function.
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