Effect of cardiomyocyte-specific deletion of glucocorticoid receptor on gene expression of cultured neonatal cardiomyocytes

To investigate the role of the glucocorticoid receptor (GR) in the regulation of cardiomyocyte maturation and proliferation, we established a cardiomyocyte-specific GR knock-out (GR-cKO) mouse model by Cre-Lox technology. We thus performed gene expression profiling analysis using data obtained from RNA-seq of cardiomyocytes isolated from GR-cKO and control mouse models at neonatal stage and cultured in vitro. Our analyses unveiled a role for GR in regulating gene networks related to the energetic metabolism, which in turn may impact on cardiomyocyte proliferative and regenerative ability. Comparative gene expression profiling analysis of RNA-seq data of cardiomyocytes isolated from GR-cKO and control mouse models at postnatal-day-1 (P1) and cultured in vitro