Effect of KDM5 histone demethylase in 3T3-L1 differentiation
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE239950 | GEO | 2024/03/04
REPOSITORIES: GEO
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Project description:Rationale: Human pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) provide a platform to identify and characterize factors that regulate the maturation of CMs. The transition from an immature fetal to adult CM state entails coordinated regulation of the expression of genes involved in myofibril formation and OXPHOS among others. Lysine demethylase 5 (KDM5) specifically demethylate H3K4me1/2/3 and have emerged as potential regulators of expression of genes involved in cardiac development and mitochondrial function.Objectives: The purpose of this study is to determine the role of KDM5 in iPSC-CM maturation.Methods and Results: KDM5A, B, and C proteins were mainly expressed in the early post-natal stages and their expressions were progressively downregulated in the postnatal cardiomyocytes and were absent in adult hearts and CMs. In contrast, KDM5 proteins were persistently expressed in the iPSC-CMs up to 60 days after the induction of myogenic differentiation, consistent with the immaturity of these cells. Inhibition of KDM5 by KDM5-C70 -a pan-KDM5 inhibitor, induced differential expression of 2,372 genes, including upregulation of genes involved in fatty acid oxidation (FAO), OXPHOS, and myogenesis in the iPSC-CMs. Likewise, genome-wide profiling of H3K4me3 binding sites by the CUT&RUN (Cleavage Under Targets & Release Using Nuclease) assay showed enriched of the H3K4me3 peaks at the promoter regions of genes encoding FAO, OXPHOS, and sarcomere proteins. Consistent with the chromatin and gene expression data, KDM5 inhibition increased expression of multiple sarcomere proteins and enhanced myofibrillar organization. Furthermore, inhibition of KDM5 increased H3K4me3 deposits at the promoter region of the ESRRA gene and increased its RNA and protein levels. Knockdown of ESRRA in KDM5-C70-treated iPSC-CM suppressed expression of a subset of the KDM5 targets. In conjunction with changes in the gene expression, KDM5 inhibition increased oxygen consumption rate and contractility in iPSC-CMs.
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