Abstract

Ambiguous alteration patterns of 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) involved in Alzheimer's disease (AD) obstructed the mechanism investigation of this neurological disorder from epigenetic view. Here, we applied a fully quantitative and validated LC-MS/MS method to determine genomic 5mC and 5hmC in the brain cortex of 3 month-aged (12, 15, and 18month) AD model mouse and found significant increases of 5mC and 5hmC levels in different months of AD mouse when compared with age-matched wild-type control and exhibited rising trend from 12-month to 18-monthAD mouse, thereby supporting genomic DNA methylation and hydroxymethylation were positively correlated with developing AD.

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