GSE103249 Snord116-dependent diurnal rhythm of DNA methylation in mouse cortex

Contributors : Rochelle L Coulson ; Yasui H Dag ; Keith Dunaway ; Benjamin I Laufer ; Annie Vogel Ciernia ; Yihui Zhu ; Charles E Mordaunt ; Theresa S Totah ; Janine M LaSalleSeries Type : Methylation profiling by high throughput sequencingOrganism : Mus musculusRhythmic oscillations of physiological processes depend on integrating the circadian clock and diurnal environment.   DNA methylation is epigenetically responsive to daily rhythms, as a subset of CpG dinucleotides in brain exhibit diurnal rhythmic methylation.  A major genetic effect on rhythmic methylation was identified in a mouse Snord116 deletion model of the imprinted disorder Prader-Willi syndrome (PWS).  > 23,000 diurnally rhythmic CpGs were identified in wild-type cortex, with nearly all lost or phase-shifted in PWS. Circadian dysregulation of a second imprinted Snord cluster at the Temple/Kagami-Ogata syndrome locus was observed at the level of methylation, transcription, and chromatin, providing mechanistic evidence of cross-talk.  Genes identified by diurnal epigenetic changes in PWS mice overlapped rhythmic and PWS-specific genes in human brain and were enriched for PWS-relevant phenotypes and pathways. These results support the proposed evolutionary relationship between imprinting and sleep, and suggest possible chronothe rapy in the treatment of PWS and related disorders.
Source: GEO: Gene Expression Omnibus - Category: Genetics & Stem Cells Tags: Methylation profiling by high throughput sequencing Mus musculus Source Type: research