Genome-wide screen for modifiers of Parkinson's disease genes in Drosophila.

Genome-wide screen for modifiers of Parkinson's disease genes in Drosophila.
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DOI:
10.1186/1756-6606-4-17
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发表时间:
2011-04-19
期刊:
影响因子:
3.6
通讯作者:
Rao Y
Rao Y
中科院分区:
医学3区
文献类型:
--
作者:
Fernandes C;Rao Y

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帕金森和pten诱导的激酶1 (Pink1)突变导致常染色体隐性形式的帕金森病(PD)。parkin和Pink1分别编码一个泛素蛋白连接酶和一个线粒体定位的丝氨酸/苏氨酸激酶。最近的研究表明,Parkin和Pink1在保护线粒体完整性的共同和进化上保守的途径中。为了系统地识别PD通路的新成分,我们生成了一个遗传背景,使我们能够对果蝇parkin (park)和Pink1突变表型的修饰因子进行全基因组F1筛选。通过筛选约80%的果蝇基因组,我们确定了许多与park和/或Pink1相互作用的细胞学区域。其中选取4个细胞学区域,鉴定相应的pd相互作用基因。通过分析较小的缺陷染色体、可用的转基因RNAi系和p元件插入,我们确定了5个pd相互作用基因。其中,opa1和drp1先前与PD通路有关,而debra (dbr), Pi3K21B和β4GalNAcTA是新的PD相互作用基因。采用无偏遗传方法系统分离果蝇PD基因修饰子。进一步研究新的PD相互作用基因将有助于揭示PD基因的功能,并有助于开发治疗帕金森病的新策略。
Mutations in parkin and PTEN-induced kinase 1 (Pink1) lead to autosomal recessive forms of Parkinson's disease (PD). parkin and Pink1 encode a ubiquitin-protein ligase and a mitochondrially localized serine/threonine kinase, respectively. Recent studies have implicated Parkin and Pink1 in a common and evolutionarily conserved pathway for protecting mitochondrial integrity. To systematically identify novel components of the PD pathways, we generated a genetic background that allowed us to perform a genome-wide F1 screen for modifiers of Drosophila parkin (park) and Pink1 mutant phenotype. From screening ~80% of the fly genome, we identified a number of cytological regions that interact with park and/or Pink1. Among them, four cytological regions were selected for identifying corresponding PD-interacting genes. By analyzing smaller deficiency chromosomes, available transgenic RNAi lines, and P-element insertions, we identified five PD-interacting genes. Among them, opa1 and drp1 have been previously implicated in the PD pathways, whereas debra (dbr), Pi3K21B and β4GalNAcTA are novel PD-interacting genes. We took an unbiased genetic approach to systematically isolate modifiers of PD genes in Drosophila. Further study of novel PD-interacting genes will shed new light on the function of PD genes and help in the development of new therapeutic strategies for treating Parkinson's disease.
线粒体质量控制:有关帕金森氏病与pink1,Parkin和Omi/Htra2相关的见解,以保持线粒体稳态。
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