MiR-101 reverses the hypomethylation of the LMO3 promoter in glioma cells.

MiR-101 reverses the hypomethylation of the LMO3 promoter in glioma cells.
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MiR-101 逆转神经胶质瘤细胞中 LMO3 启动子的低甲基化。

DOI:
10.18632/oncotarget.3181
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发表时间:
2015-04-10
期刊:
影响因子:
--
通讯作者:
Wu M
Wu M
中科院分区:
其他
文献类型:
--
作者:
Liu X;Lei Q;Yu Z;Xu G;Tang H;Wang W;Wang Z;Li G;Wu M

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LIM-only蛋白3(LMO 3)是我们前期研究中通过MeDIP芯片在胶质瘤中发现的一个新的DNA甲基化基因,属于LIM-only蛋白组。在这项研究中,我们发现LIM-唯一蛋白3(LMO 3)是低甲基化和过度表达的胶质瘤细胞和组织。LMO 3的过表达与胶质瘤患者的不良预后相关,并且LMO 3被肿瘤抑制剂miR-101间接抑制,miR-101是胶质瘤的潜在预后标志物。MiR-101通过逆转LMO 3启动子的甲基化状态和通过抑制甲基化相关组蛋白H3 K4 me 2和H3 K27 me 3的存在并增加启动子上H3 K9 me 3和H4 K20 me 3的存在来降低LMO 3的表达。已确定miR-101通过抑制EZH 2、DNMT 3A和EED降低H3 K27 me 3的占据,并通过SUV 39 H1、SUV 39 H2、G9 a和PHF 8降低LMO 3启动子上的H3 K9 me 3占据。此外,miR-101通过减少USF和MZF 1抑制LMO 3的表达。
LIM-only protein 3 (LMO3), a member of the LIM-only protein group, is a new DNA methylation gene that was identified in gliomas via the MeDIP-Chip in our previous study. In this study, we found that LIM-only protein 3 (LMO3) is hypomethylated and overexpressed in glioma cells and tissues. The overexpression of LMO3 was correlated with a poor prognosis in glioma patients, and LMO3 was indirectly inhibited by the tumor suppressor miR-101, which is a potential prognosis marker of gliomas. MiR-101 decreased the expression of LMO3 by reversing the methylation status of the LMO3 promoter and by inhibiting the presence of the methylation-related histones H3K4me2 and H3K27me3 and increasing the presence of H3K9me3 and H4K20me3 on the promoter. It was determined that miR-101 decreases the occupancy of H3K27me3 by inhibiting EZH2, DNMT3A and EED and decreases the H3K9me3 occupancy on the LMO3 promoter via SUV39H1, SUV39H2, G9a and PHF8. Furthermore, miR-101 suppresses the expression of LMO3 by decreasing USF and MZF1.
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