Lisa Boureau1, Andrea Constantinof2, Vasilis G Moisiadis2, Stephen G Matthews2,3,4, Moshe Szyf1. 1. Department of Pharmacology & Therapeutics, Sackler Program for Epigenetics & Psychobiology, McGill University, Montreal, Quebec H3G 1Y6, Canada. 2. Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada. 3. Department of Obstetrics & Gynecology, University of Toronto, Toronto, Ontario M5G 1E2, Canada. 4. Department of Medicine, University of Toronto, Toronto, Ontario M5G 2C4, Canada.
Abstract
AIM: To determine the state of methylation of DNA molecules in the guinea pig hippocampus that are associated with either poised or active enhancers. METHODS: We used sequential chromatin immunoprecipitation-bisulfite-sequencing with an antibody to H3K4me1 to map the state of methylation of DNA that is found within enhancers. Actively transcribing transcription start sites were mapped by chromatin immunoprecipitation-sequencing with an antibody to RNApolII-PS5. Total DNA methylation was mapped using reduced representation bisulfite sequencing. RESULTS: DNA that overlaps with H3K4me1 binding regions in the genome is heavily methylated. However, DNA molecules that are found in H3K4me1 chromatin are hypomethylated, while DNA found in enhancers that are associated with active transcription is further demethylated. Differential methylation in enhancers is spotted in single CGs, bimodal and corresponds to transcription factor binding sites. CONCLUSION: Our study delineates the DNA methylation status of H3K4 me1-bound regions in the hippocampus in active and inactive genes.
AIM: To determine the state of methylation of DNA molecules in the guinea pig hippocampus that are associated with either poised or active enhancers. METHODS: We used sequential chromatin immunoprecipitation-bisulfite-sequencing with an antibody to H3K4me1 to map the state of methylation of DNA that is found within enhancers. Actively transcribing transcription start sites were mapped by chromatin immunoprecipitation-sequencing with an antibody to RNApolII-PS5. Total DNA methylation was mapped using reduced representation bisulfite sequencing. RESULTS: DNA that overlaps with H3K4me1 binding regions in the genome is heavily methylated. However, DNA molecules that are found in H3K4me1 chromatin are hypomethylated, while DNA found in enhancers that are associated with active transcription is further demethylated. Differential methylation in enhancers is spotted in single CGs, bimodal and corresponds to transcription factor binding sites. CONCLUSION: Our study delineates the DNA methylation status of H3K4 me1-bound regions in the hippocampus in active and inactive genes.
Authors: Janna L Morrison; Kimberley J Botting; Jack R T Darby; Anna L David; Rebecca M Dyson; Kathryn L Gatford; Clint Gray; Emilio A Herrera; Jonathan J Hirst; Bona Kim; Karen L Kind; Bernardo J Krause; Stephen G Matthews; Hannah K Palliser; Timothy R H Regnault; Bryan S Richardson; Aya Sasaki; Loren P Thompson; Mary J Berry Journal: J Physiol Date: 2018-05-30 Impact factor: 5.182
Authors: Andrea Constantinof; Lisa Boureau; Vasilis G Moisiadis; Alisa Kostaki; Moshe Szyf; Stephen G Matthews Journal: Sci Rep Date: 2019-12-03 Impact factor: 4.379