Circular RNA circ-RCCD promotes cardiomyocyte differentiation in mouse embryo development via recruiting YY1 to the promoter of MyD88.

Abstract

Congenital heart disease (CHD) is the most common birth defect, affecting approximately 1% of live births. Genetic and environmental factors are leading factors to CHD, but the mechanism of CHD pathogenesis remains unclear. Circular RNAs (circRNAs) are kinds of endogenous non-coding RNAs (ncRNAs) involved in a variety of physiological and pathological processes, especially in heart diseases. In this study, three significant differently expressed circRNA between maternal embryonic day (E) E13 and E17 was found by microarray assay. Among them, the content of circ-RCCD increases with the development of heart and was enriched in primary cardiomyocytes of different species, which arouses our attention. Functional experiments revealed that inhibition of circ-RCCD dramatically suppressed the formation of beating cell clusters, the fluorescence intensity of cardiac differentiation marker MF20, and the expression of the myocardial-specific markers CTnT, Mef2c, and GATA4. Next, we found that circ-RCCD was involved in cardiomyocyte differentiation through negative regulation of MyD88 expression. Further experiments proved that circ-RCCD inhibited MyD88 levels by recruiting YY1 to the promoter of MyD88; circ-RCCD inhibited nuclear translocation of YY1. These results reported that circ-RCCD promoted cardiomyocyte differentiation by recruiting YY1 to the promoter of MyD88. And, this study provided a potential role and molecular mechanism of circ-RCCD as a target for the treatment of CHD.

• Authors: Yiwen Liu, Jianfang Gao, Min Xu, Qianqian Zhou, Zhongxiao Zhang, Jiaxin Ye, Rui Li
• Journal: Journal of cellular and molecular medicine (J Cell Mol Med) Vol. 26 Issue 13 Pg. 3616-3627 (07 2022) ISSN: 1582-4934 [Electronic] England
• PMID: 35692080 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2022 The Authors. Journal of Cellular and Molecular Medicine published by Foundation for Cellular and Molecular Medicine and John Wiley & Sons Ltd.

Chemical References

• Adaptor Proteins, Signal Transducing
• MicroRNAs
• Myd88 protein, mouse
• Myeloid Differentiation Factor 88
• RNA, Circular
• YY1 Transcription Factor
• Yy1 protein, mouse

Topics

• Adaptor Proteins, Signal Transducing (genetics, metabolism)
• Animals
• Cell Proliferation (genetics)
• Embryonic Development
• Mice
• MicroRNAs (genetics, metabolism)
• Myeloid Differentiation Factor 88 (genetics, metabolism)
• Myocytes, Cardiac (metabolism)
• Promoter Regions, Genetic
• RNA, Circular (genetics, metabolism)
• YY1 Transcription Factor (genetics, metabolism)