期刊
JOURNAL OF GENETICS AND GENOMICS
卷 43, 期 10, 页码 587-592出版社
SCIENCE PRESS
DOI: 10.1016/j.jgg.2016.05.002
关键词
Epigenetic regulation; Neurodegenerative diseases; Environmental toxins; Neurogenesis
资金
- National Natural Science Foundation of China [313300257, 81429002, 81161120498]
- National Basic Research Program of China [2011CB51000]
- 111 Program of Foreign Expert Bureau of China [B10036]
Parkinson disease (PD) is a progressive neurodegenerative movement disorder. Both environmental and genetic factors play important roles in PD etiology. A number of environmental toxins cause parkinsonism in human and animal models. Genetic studies of rare early onset familial PD cases resulted in identification of disease-linked mutations in multiple genes. Nevertheless, the potential interaction between environment and genetics in PD pathogenesis remains largely unknown. We hypothesized that environmental factors induce abnormal epigenetic regulation that is involved in the pathogenesis of both familial and sporadic PD. We determined the global methylation status of 80,000-110,000 CpG sites in each of the five sporadic PD patient brains and five age and postmodern interval matched control brains utilizing bisulfite padlock sequencing. Multiple genes involved in neurogenesis, particularly the ones in the Wnt signaling pathway, were hypermethylated in PD brains compared to their matched control brains. Consistent with the DNA methylation changes, marked reduction of protein expression was observed for four Wnt and neurogenesis related genes (FOXC1, NEURG2, SPRY1, and CTNNB1) in midbrain dopaminergic (DA) neurons of PD. The treatment of low concentration of 1-methyl-4-phenylpyridinium (MPP+) for cells resulted in downregulation of Wnt related genes. The study revealed an important link between the epigenetic disregulation of Wnt signaling and the pathogenesis and progression of PD. Copyright (C) 2016, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Limited and Science Press. All rights reserved.
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