Folic Acid Alters Methylation Profile of JAK-STAT and Long-Term Depression Signaling Pathways in Alzheimer’s Disease Models
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- 作者：Wen Li ; Huan Liu ; Min Yu ; Xumei Zhang ; Yan Zhang ; Hongbo Liu…
- 关键词：Folic acid ; Alzheimer’s disease ; DNA methylation profile ; JAK ; STAT signaling pathway ; Long ; term depression signaling pathway
- 刊名：Molecular Neurobiology
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：53
- 期：9
- 页码：6548-6556
- 全文大小：1,506 KB
- 刊物主题：Neurosciences; Neurobiology; Cell Biology; Neurology;
- 出版者：Springer US
- ISSN：1559-1182
- 卷排序：53
文摘
Dementia has emerged as a major societal issue because of the worldwide aging population and the absence of any effective treatment. DNA methylation is an epigenetic mechanism that evidently plays a role in Alzheimer’s disease (AD). Folate acts through one-carbon metabolism to support the methylation of multiple substrates including DNA. We aimed to test the hypothesis that folic acid supplementation alters DNA methylation profiles in AD models. Mouse Neuro-2a cells expressing human APP695 (N2a-APP cells) were incubated with folic acid (2.8–20 μmol/L). AD transgenic mice were fed either folate-deficient or control diets and gavaged daily with water or folic acid (600 μg/kg). Gene methylation profiles were determined by methylated DNA immunoprecipitation-DNA microarray (MeDIP-chip). Differentially methylated regions (DMRs) were determined by Quantitative Differentially Methylated Regions analysis, and differentially methylated genes (DMGs) carrying at least three DMRs were selected for pathway analysis. Folic acid up-regulated DNA methylation levels in N2a-APP cells and AD transgenic mouse brains. Functional network analysis of folic acid-induced DMGs in these AD models revealed subnetworks composed of 24 focus genes in the janus kinase-signal transducer and activator of transcription (JAK-STAT) signaling pathway and 12 focus genes in the long-term depression (LTD) signaling pathway. In conclusion, these results revealed a role for folic acid in the JAK-STAT and LTD signaling pathways which may be relevant to AD pathogenesis. This novel finding may stimulate reinvestigation of folic acid supplementation as a prophylactic or therapeutic treatment for AD.