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- W2920432372 abstract "Background: Circular RNAs (circRNAs) are regarded as a novel class of noncoding RNA regulators. Although a number of circRNAs have been identified by bioinformatics analysis of RNA-seq data, the tissue- and disease-specific circRNAs are still to be uncovered to promote their application in basic research and clinical practice. The purpose of this study was to explore the circRNA profiles in human induced pluripotent stem cells (hiPSCs) and hiPSC-derived cardiomyocytes (hiPSC-CMs), and identify cardiac or disease-specific circRNAs. Methods: Human iPSCs were generated from fibroblasts, and then further differentiated to hiPSC-CMs by modulating WNT signaling in RPMI+B27 medium. Following high-throughput RNA sequencing, circRNAs were extracted and quantified by a combined strategy known as CIRCexplorer. Integrative analysis was performed to illuminate the correlation between circRNAs and their parental linear isoforms. Cardiac and disease-specific expression of circRNAs was confirmed by quantitative reverse-transcription PCR. Results: In this study, a total of 5602 circRNAs were identified in hiPSCs and hiPSC-CMs. Our data indicated, for the first time, a more enriched expression of circRNAs in differentiated cardiomyocytes than undifferentiated hiPSCs. In addition to the host gene-dependent expression, our integrative analysis also identified a number of circRNAs showing host gene-independent expression in hiPSCs and hiPSC-CMs. CircRNAs including circSLC8A1 , circCACNA1D , circSPHKAP and circALPK2 showed a cardiac-selective expression during cardiac differentiation and human heart-specific enrichment in fetal tissues. Furthermore, circSLC8A1 abnormally increased in heart tissues from patients suffering from dilated cardiomyopathy (DCM). Conclusions: CircRNAs are highly enriched in hiPSC-differentiated CMs, and cardiac-specific circRNAs such as circSLC8A1 , circCACNA1D , circSPHKAP and circALPK2 may serve as biomarkers of CMs. Detection of the excessive expression of circSLC8A1 provides a potential approach for pathological status indication of heart disease." @default.
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- W2920432372 date "2018-08-03" @default.
- W2920432372 modified "2023-09-23" @default.
- W2920432372 title "Abstract 463: Signature of Circular RNAs in Human Induced Pluripotent Stem Cells and Derived Cardiomyocytes" @default.
- W2920432372 doi "https://doi.org/10.1161/res.123.suppl_1.463" @default.
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