DNA demethylation in retinal neurocytes contributes to the upregulation of DNA repair protein, Ku80

DNA demethylation in retinal neurocytes contributes to the upregulation of DNA repair protein, Ku80
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视网膜神经细胞中的 DNA 去甲基化有助于 DNA 修复蛋白 Ku80 的上调

DOI:
10.1097/wnr.0b013e328336ee7e
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发表时间:
2010-03
期刊:
影响因子:
1.7
通讯作者:
Luo, Huihui
Luo, Huihui
中科院分区:
医学4区
文献类型:
--
作者:
Li, Fan;Chen, Zhao;Ye, Yiming;Pan, Xueke;Liu, Xuan;Yu, Keming;Ge, Yihong;Kaminski, Joseph;Zhuang, Jing;Ge, Jian;Luo, Huihui

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Ku80在DNA双链断裂修复中起关键作用。然而,Ku80在成熟神经细胞中是沉默的。本研究探讨了Ku80沉默的机制及其在视网膜神经细胞DNA双链断裂修复中的作用。我们的数据显示,体外5-氮杂胞苷处理后,原代培养的视网膜神经细胞中Ku80的表达被激活,而Ku80启动子- 179 bp的甲基化诱导视网膜神经细胞中Ku80沉默。H2O2处理后,5-氮杂胞苷对视网膜神经细胞Ku80的再激活增强了DNA的完整性。因此,我们的数据表明Ku80可能是再激活以增加视网膜神经元DNA修复的靶标。
Ku80 plays a critical role in DNA double strand breaks repair. However, Ku80 is silenced in mature neurocytes. In this study, the mechanism of Ku80 silencing and its role in DNA double strand break repair in retinal neurocytes was investigated. Our data show that Ku80 expression is activated in primary cultured retinal neurocytes after treatment with 5-azacytidine in vitro, whereas methylation of −179 bp in Ku80 promoter induces Ku80 silencing in retinal neurocytes. Ku80 reactivation in retinal neurocytes by 5-azacytidine enhances DNA integrity after treatment with H2O2. Therefore, our data suggest Ku80 might be a target for reactivation to increase retinal neuronal DNA repair.
DOI: 10.1634/stemcells.2007-0649
发表时间: 2008-04-01
期刊: STEM CELLS
影响因子: 5.2
作者:
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