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ResearchIn-Press PreviewCardiology Open Access | 10.1172/JCI177077
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Liu, Q. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Huang, J. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Ding, H. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Tao, Y. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Nan, J. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Xiao, C. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Wang, Y. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Wu, R. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Ni, C. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Zhong, Z. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Zhu, W. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Chen, J. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Zhang, C. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by He, X. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Xiong, D. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Hu, X. in: JCI | PubMed | Google Scholar
1Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
2Department of Cardiology, Cardiovascular Key Laboratory of Zhejiang Provinc, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
3Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
4Shanghai Engineering Research Center of Molecular Therapeutics and New Drug, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineer, Shanghai, China
Find articles by Wang, J. in: JCI | PubMed | Google Scholar
Published October 31, 2024 - More info
Myocardial infarction (MI) is characterized by massive cardiomyocytes death and cardiac dysfunction, and effective therapies to achieve cardioprotection are sorely needed. Here we reported that flavin containing monooxygenase 2 (FMO2) level was markedly increased in cardiomyocytes both in ex vivo and in vivo models of ischemia injury. Genetic deletion of FMO2 resulted in reduced cardiomyocyte survival and enhanced cardiac dysfunction, whereas cardiomyocyte-specific FMO2 overexpression exerted a protective effect in infarcted rat hearts. Mechanistically, FMO2 inhibited the activation of endoplasmic reticulum (ER) stress-induced apoptotic proteins, including caspase 12 and C/EBP homologous protein (CHOP), by down-regulating unfolded protein response (UPR) pathway. Furthermore, we identified FMO2 as a chaperone that catalyzed disulfide-bond formation in unfolded/misfolded proteins through its GVSG motif. GVSG-mutated FMO2 failed to catalyze disulfide-bond formation and lost its protection against ER stress and cardiomyocyte death. Finally, we demonstrated the protective effect of FMO2 in human induced pluripotent stem cell–derived cardiomyocyte (hiPSC-CM) model. Collectively, this study highlights FMO2 as a key modulator of oxidative protein folding in cardiomyocytes and underscores its therapeutic potential for treating ischemic heart disease.