DNA methylation analysis of the mammalian PEG3 imprinted domain.

DNA methylation analysis of the mammalian PEG3 imprinted domain.
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DOI:
10.1016/j.gene.2009.04.016
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发表时间:
2009-08-01
期刊:
影响因子:
3.5
通讯作者:
Kim J
Kim J
中科院分区:
生物学3区
文献类型:
--
作者:
Huang JM;Kim J

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在这项研究中,我们进行了第一次系统调查的DNA甲基化状态的PEG 3(父系表达基因3)印迹结构域在小鼠,牛和人类基因组中的CpG岛。先前的研究表明,PEG 3的第一个外显子周围的区域包含一个差异甲基化的CpG岛。此外,我们还发现了两个以前未报道的差异甲基化区域(DMR):一个在小鼠Zim 3的启动子区,另一个在人USP 29的启动子区。在奶牛中,Peg 3-CpG岛是显示DMR状态的唯一区域。我们还使用人肿瘤来源的DNA检查了该区域中几个CpG岛的甲基化状态。PEG 3和USP 29附近的CpG岛在乳腺和卵巢肿瘤DNA中都表现出高甲基化。总的来说,这项研究表明,人,牛和小鼠的PEG 3印迹结构域包含不同数量的DMR,但PEG 3-CpG岛是这三个物种中唯一保守的DMR。
In this study, we performed the first systematic survey of DNA methylation status of the CpG islands of the PEG3 (Paternally expressed gene 3) imprinted domain in the mouse, cow, and human genomes. Previous studies have shown that the region surrounding the first exon of PEG3 contains a differentially methylated CpG island. In addition, we have discovered two previously unreported differentially methylated regions (DMR): one in the promoter region of mouse Zim3 and another in the promoter region of human USP29. In the cow, the Peg3-CpG island was the only area that showed DMR status. We have also examined the methylation status of several CpG islands in this region using human tumor derived DNA. The CpG islands near PEG3 and USP29 both showed hypermethylation in DNA derived from breast and ovarian tumors. Overall, this study shows that the PEG3 imprinted domain of humans, cows, and mice contains differing numbers of DMRs, but the PEG3-CpG island is the only DMR that is conserved among these three species.
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