ALKBH5 regulates cardiomyocyte proliferation and heart regeneration by demethylating the mRNA of YTHDF1

N -methyladenosine (m A) RNA modification, a dynamic and reversible process, is essential for tissue development and pathogenesis. However, the potential involvement of m A in the regulation of cardiomyocyte (CM) proliferation and cardiac regeneration remains unclear. In this study, we aimed to inve...

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Veröffentlicht in:Theranostics 2021, Vol.11 (6), p.3000-3016
Hauptverfasser: Han, Zhenbo, Wang, Xiuxiu, Xu, Zihang, Cao, Yang, Gong, Rui, Yu, Yang, Yu, Ying, Guo, Xiaofei, Liu, Shenzhen, Yu, Meixi, Ma, Wenya, Zhao, Yiming, Xu, Juan, Li, Xingda, Li, Shuainan, Xu, Yan, Song, Ruijie, Xu, Binbin, Yang, Fan, Bamba, Djibril, Sukhareva, Natalia, Lei, Hong, Gao, Manqi, Zhang, Wenwen, Zagidullin, Naufal, Zhang, Ying, Yang, Baofeng, Pan, Zhenwei, Cai, Benzhi
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container_issue 6
container_start_page 3000
container_title Theranostics
container_volume 11
creator Han, Zhenbo
Wang, Xiuxiu
Xu, Zihang
Cao, Yang
Gong, Rui
Yu, Yang
Yu, Ying
Guo, Xiaofei
Liu, Shenzhen
Yu, Meixi
Ma, Wenya
Zhao, Yiming
Xu, Juan
Li, Xingda
Li, Shuainan
Xu, Yan
Song, Ruijie
Xu, Binbin
Yang, Fan
Bamba, Djibril
Sukhareva, Natalia
Lei, Hong
Gao, Manqi
Zhang, Wenwen
Zagidullin, Naufal
Zhang, Ying
Yang, Baofeng
Pan, Zhenwei
Cai, Benzhi
description N -methyladenosine (m A) RNA modification, a dynamic and reversible process, is essential for tissue development and pathogenesis. However, the potential involvement of m A in the regulation of cardiomyocyte (CM) proliferation and cardiac regeneration remains unclear. In this study, we aimed to investigate the essential role of m A modification in heart regeneration during postnatal and adult injury. In this study, we identified the downregulation of m A demethylase ALKBH5, an m6A "eraser" that is responsible for increased m A methylation, in the heart after birth. Notably, knockout mice exhibited decreased cardiac regenerative ability and heart function after neonatal apex resection. Conversely, forced expression of ALKBH5 via adeno-associated virus-9 (AAV9) delivery markedly reduced the infarct size, restored cardiac function and promoted CM proliferation after myocardial infarction in juvenile (7 days old) and adult (8-weeks old) mice. Mechanistically, ALKBH5-mediated m A demethylation improved the mRNA stability of YTH N -methyladenosine RNA-binding protein 1 (YTHDF1), thereby increasing its expression, which consequently promoted the translation of Yes-associated protein (YAP). The modulation of ALKBH5 and YTHDF1 expression in human induced pluripotent stem cell-derived cardiomyocytes consistently yielded similar results. Taken together, our findings highlight the vital role of the ALKBH5-m A-YTHDF1-YAP axis in the regulation of CMs to re-enter the cell cycle. This finding suggests a novel potential therapeutic strategy for cardiac regeneration.
doi_str_mv 10.7150/thno.47354
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However, the potential involvement of m A in the regulation of cardiomyocyte (CM) proliferation and cardiac regeneration remains unclear. In this study, we aimed to investigate the essential role of m A modification in heart regeneration during postnatal and adult injury. In this study, we identified the downregulation of m A demethylase ALKBH5, an m6A "eraser" that is responsible for increased m A methylation, in the heart after birth. Notably, knockout mice exhibited decreased cardiac regenerative ability and heart function after neonatal apex resection. Conversely, forced expression of ALKBH5 via adeno-associated virus-9 (AAV9) delivery markedly reduced the infarct size, restored cardiac function and promoted CM proliferation after myocardial infarction in juvenile (7 days old) and adult (8-weeks old) mice. Mechanistically, ALKBH5-mediated m A demethylation improved the mRNA stability of YTH N -methyladenosine RNA-binding protein 1 (YTHDF1), thereby increasing its expression, which consequently promoted the translation of Yes-associated protein (YAP). The modulation of ALKBH5 and YTHDF1 expression in human induced pluripotent stem cell-derived cardiomyocytes consistently yielded similar results. Taken together, our findings highlight the vital role of the ALKBH5-m A-YTHDF1-YAP axis in the regulation of CMs to re-enter the cell cycle. 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subjects Cardiac function
Cardiomyocytes
Cell cycle
Heart
Kinases
Plasmids
Protein expression
Proteins
Research Paper
Rodents
Stem cells
title ALKBH5 regulates cardiomyocyte proliferation and heart regeneration by demethylating the mRNA of YTHDF1
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