Abstract
Limited knowledge exists of the extent of epigenetic alterations, such as DNA methylation, in heart failure (HF). We conducted targeted DNA methylation sequencing to identify DNA methylation alterations in coding and noncoding RNA (ncRNA) across different etiological subtypes of HF. A targeted bisulfite sequence capture sequencing platform was applied to DNA extracted from cardiac interventricular septal tissue of 30 male HF patients encompassing causes including hypertrophic obstructive cardiomyopathy, ischemic cardiomyopathy, dilated cardiomyopathy, and 9 control patients with nonfailing hearts. We detected 62 678 differentially methylated regions in the studied HF cohort. By comparing each HF subgroup to the nonfailing control group, we identified 195 unique differentially methylated regions: 5 in hypertrophic obstructive cardiomyopathy, 151 in dilated cardiomyopathy, and 55 in ischemic cardiomyopathy. These translated to 4 genes/1 ncRNA in hypertrophic obstructive cardiomyopathy, 131 genes/17 ncRNA in dilated cardiomyopathy, and 51 genes/5 ncRNA in ischemic cardiomyopathy. Subsequent gene/ncRNA expression analysis was assessed using quantitative reverse transcription polymerase chain reaction and revealed 6 genes: 4 hyperme...Continue Reading
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