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DNA methylation profiling allows for characterization of atrial and ventricular cardiac tissues and hiPSC-CMs
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DNA methylation profiling allows for characterization of atrial and ventricular cardiac tissues and hiPSC-CMs
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Journal Article
DNA methylation profiling allows for characterization of atrial and ventricular cardiac tissues and hiPSC-CMs
2019
Overview
Background
Cardiac disease modelling using human-induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CM) requires thorough insight into cardiac cell type differentiation processes. However, current methods to discriminate different cardiac cell types are mostly time-consuming, are costly and often provide imprecise phenotypic evaluation. DNA methylation plays a critical role during early heart development and cardiac cellular specification. We therefore investigated the DNA methylation pattern in different cardiac tissues to identify CpG loci for further cardiac cell type characterization.
Results
An array-based genome-wide DNA methylation analysis using Illumina Infinium HumanMethylation450 BeadChips led to the identification of 168 differentially methylated CpG loci in atrial and ventricular human heart tissue samples (
n
= 49) from different patients with congenital heart defects (CHD). Systematic evaluation of atrial-ventricular DNA methylation pattern in cardiac tissues in an independent sample cohort of non-failing donor hearts and cardiac patients using bisulfite pyrosequencing helped us to define a subset of 16 differentially methylated CpG loci enabling precise characterization of human atrial and ventricular cardiac tissue samples. This defined set of reproducible cardiac tissue-specific DNA methylation sites allowed us to consistently detect the cellular identity of hiPSC-CM subtypes.
Conclusion
Testing DNA methylation of only a small set of defined CpG sites thus makes it possible to distinguish atrial and ventricular cardiac tissues and cardiac atrial and ventricular subtypes of hiPSC-CMs. This method represents a rapid and reliable system for phenotypic characterization of in vitro-generated cardiomyocytes and opens new opportunities for cardiovascular research and patient-specific therapy.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V
Subject
/ Biomedical and Life Sciences
/ DNA
/ Female
/ Genomes
/ Genomics
/ Heart
/ Heart Defects, Congenital - genetics
/ Heart Defects, Congenital - pathology
/ Heart Ventricles - chemistry
/ Humans
/ Induced Pluripotent Stem Cells - chemistry
/ Induced Pluripotent Stem Cells - cytology
/ Male
/ Myocytes, Cardiac - chemistry
/ Myocytes, Cardiac - cytology
/ Principal components analysis
/ Sulfites
