Actin‐related protein 5 suppresses the cooperative activation of cardiac gene transcription by myocardin and MEF2

Author:

Morita Tsuyoshi1ORCID,Hayashi Ken'ichiro23ORCID

Affiliation:

1. Department of Biology Wakayama Medical University Japan

2. Department of Ophthalmology Yamaguchi University Graduate School of Medicine Japan

3. Department of RNA Biology and Neuroscience Osaka University Graduate School of Medicine Japan

Abstract

MYOCD is a transcription factor important for cardiac and smooth muscle development. We previously identified that actin‐related protein 5 (ARP5) binds to the N‐terminus of MYOCD. Here, we demonstrate that ARP5 inhibits the cooperative action of the cardiac‐specific isoform of MYOCD with MEF2. ARP5 overexpression in murine hearts induced cardiac hypertrophy and fibrosis, whereas ARP5 knockdown in P19CL6 cells significantly increased cardiac gene expression. ARP5 was found to bind to a MEF2‐binding motif of cardiac MYOCD and inhibit MEF2‐mediated transactivation by MYOCD. RNA‐seq analysis revealed 849 genes that are upregulated by MYOCD‐MEF2 and 650 genes that are repressed by ARP5. ARP5 expression increased with cardiomyopathy and was negatively correlated with the expression of Tnnt2 and Ttn, which were regulated by cardiac MYOCD‐MEF2. Overall, our data suggest that ARP5 is a potential suppressor of cardiac MYOCD during physiological and pathological processes.

Funder

Japan Society for the Promotion of Science

Publisher

Wiley

Subject

General Biochemistry, Genetics and Molecular Biology

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Regulation of Arp5 expression by alternative splicing coupled to nonsense-mediated RNA decay;Biochemical and Biophysical Research Communications;2023-05

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