Research of the methylation status of miR-124a gene promoter among rheumatoid arthritis patients.

Clinical & Developmental Immunology Pub Date : 2013-01-01 Epub Date: 2013-10-10 DOI:10.1155/2013/524204
Qiao Zhou, Li Long, Guixiu Shi, Jing Zhang, Tong Wu, Bin Zhou
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引用次数: 30

Abstract

Objective: To analyze the methylation status of miR-124a loci in synovial tissues of rheumatoid arthritis (RA) patients using methylation-specific polymerase chain reaction (MSP).

Materials and methods: DNA obtained from the frozen tissue of 7 RA samples, 6 osteoarthritis (OA) samples, and 3 healthy controls were undergoing bisulfite conversion and then analyzed for miR-124a promoter methylation using MSP assay.

Results: miR-124-a1 and miR-124-a2 promoter methylation were both seen in 71.4% of RA samples compared to 16.7% of OA samples. miR-124-a3 promoter methylation was seen in 57.1% of RA samples and 0% of OA samples. All the three loci were unmethylated in 3 healthy controls.

Conclusion: The methylation status of miR-124a seen in this study concurs with that reported in tumor cells, indicating epigenetic dysregulation constituents, a mechanism in the development of rheumatoid arthritis.

Abstract Image

类风湿关节炎患者miR-124a基因启动子甲基化状态的研究
目的:应用甲基化特异性聚合酶链反应(MSP)分析类风湿关节炎(RA)患者滑膜组织中miR-124a位点的甲基化状态。材料和方法:从7例RA样本、6例骨关节炎(OA)样本和3例健康对照的冷冻组织中获得DNA,进行亚硫酸盐转化,然后使用MSP法分析miR-124a启动子甲基化。结果:71.4%的RA样本中miR-124-a1和miR-124-a2启动子甲基化,而OA样本中这一比例为16.7%。在57.1%的RA样本和0%的OA样本中发现miR-124-a3启动子甲基化。在3名健康对照中,这3个基因座均未甲基化。结论:本研究中观察到的miR-124a甲基化状态与肿瘤细胞中报道的一致,表明表观遗传失调成分是类风湿关节炎发展的一种机制。
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