Elevated OPRD1 promoter methylation in Alzheimer’s disease patientsReport as inadecuate

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Aberrant DNA methylation has been observed in the patients with Alzheimer’s disease AD, a common neurodegenerative disorder in the elderly. OPRD1 encodes the delta opioid receptor, a member of the opioid family of G-protein-coupled receptors. In the current study, we compare the DNA methylation levels of OPRD1 promoter CpG sites CpG1, CpG2, and CpG3 between 51 AD cases and 63 controls using the bisulfite pyrosequencing technology. Our results show that significantly higher CpG3 methylation is found in AD cases than controls. Significant associations are found between several biochemical parameters including HDL-C and ALP and CpG3 methylation. Subsequent luciferase reporter gene assay shows that DNA fragment containing the three OPRD1 promoter CpGs is able to regulate gene expression. In summary, our results suggest that OPRD1 promoter hypermethylation is associated with the risk of AD.

Author: Huihui Ji , Yunliang Wang , Guili Liu , Lan Chang , Zhongming Chen, Dongsheng Zhou, Xuting Xu, Wei Cui, Qingxiao Hong, Liting Jia

Source: http://plos.srce.hr/


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