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Zhang Q, Meng H, Wang X, Chen Y, Yan Z, Ruan J, Meng F. Low expression of Notch1 may be associated with acute myocardial infarction. Front Cardiovasc Med 2024; 11:1367675. [PMID: 38841263 PMCID: PMC11150703 DOI: 10.3389/fcvm.2024.1367675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Accepted: 05/03/2024] [Indexed: 06/07/2024] Open
Abstract
Background The transmembrane protein Notch1 is associated with cell growth, development, differentiation, proliferation, apoptosis, adhesion, and the epithelial mesenchymal transition. Proteomics, as a research method, uses a series of sequencing techniques to study the composition, expression levels, and modifications of proteins. Here, the association between Notch1 and acute myocardial infarction (AMI) was investigated using proteomics, to assess the possibility of using Notch1 as a biomarker for the disease. Methods Fifty-five eligible patients with AMI and 74 with chronic coronary syndrome (CCS) were enrolled, representing the experimental and control groups, respectively. The mRNA levels were assessed using RT-qPCR and proteins were measured using ELISA, and the results were compared and analyzed. Results Notch1 mRNA levels were 0.52 times higher in the peripheral blood mononuclear cells of the AMI group relative to the CCS group (p < 0.05) while Notch1 protein levels were 0.63 times higher in peripheral blood plasma in AMI patients (p < 0.05). Notch1 levels were not associated with older age, hypertension, smoking, high abdominal-blood glucose, high total cholesterol, and high LDL in AMI. Logistic regression indicated associations between AMI and reduced Notch1 expression, hypertension, smoking, and high fasting glucose. Conclusions Notch1 expression was reduced in the peripheral blood of patients with AMI relative to those with CCS. The low expression of Notch1 was found to be an independent risk factor for AMI and may thus be an indicator of the disease.
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Affiliation(s)
- Qing Zhang
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Jilin Provincial Engineering Laboratory for Endothelial Function and Genetic Diagnosis of Cardiovascular Disease, Changchun, Jilin, China
- Jilin Provincial Molecular Biology Research Center for Precision Medicine of Major Cardiovascular Disease, Jilin Provincial Cardiovascular Research Institute, Changchun, Jilin, China
- Jilin Provincial Precision Medicine Key Laboratory for Cardiovascular Genetic Diagnosis, Changchun, Jilin, China
| | - Heyu Meng
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Jilin Provincial Engineering Laboratory for Endothelial Function and Genetic Diagnosis of Cardiovascular Disease, Changchun, Jilin, China
- Jilin Provincial Molecular Biology Research Center for Precision Medicine of Major Cardiovascular Disease, Jilin Provincial Cardiovascular Research Institute, Changchun, Jilin, China
- Jilin Provincial Precision Medicine Key Laboratory for Cardiovascular Genetic Diagnosis, Changchun, Jilin, China
| | - Xue Wang
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Jilin Provincial Engineering Laboratory for Endothelial Function and Genetic Diagnosis of Cardiovascular Disease, Changchun, Jilin, China
- Jilin Provincial Molecular Biology Research Center for Precision Medicine of Major Cardiovascular Disease, Jilin Provincial Cardiovascular Research Institute, Changchun, Jilin, China
- Jilin Provincial Precision Medicine Key Laboratory for Cardiovascular Genetic Diagnosis, Changchun, Jilin, China
| | - Yanqiu Chen
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Jilin Provincial Engineering Laboratory for Endothelial Function and Genetic Diagnosis of Cardiovascular Disease, Changchun, Jilin, China
- Jilin Provincial Molecular Biology Research Center for Precision Medicine of Major Cardiovascular Disease, Jilin Provincial Cardiovascular Research Institute, Changchun, Jilin, China
- Jilin Provincial Precision Medicine Key Laboratory for Cardiovascular Genetic Diagnosis, Changchun, Jilin, China
| | - Zhaohan Yan
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Jilin Provincial Engineering Laboratory for Endothelial Function and Genetic Diagnosis of Cardiovascular Disease, Changchun, Jilin, China
- Jilin Provincial Molecular Biology Research Center for Precision Medicine of Major Cardiovascular Disease, Jilin Provincial Cardiovascular Research Institute, Changchun, Jilin, China
- Jilin Provincial Precision Medicine Key Laboratory for Cardiovascular Genetic Diagnosis, Changchun, Jilin, China
| | - Jianjun Ruan
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Jilin Provincial Engineering Laboratory for Endothelial Function and Genetic Diagnosis of Cardiovascular Disease, Changchun, Jilin, China
- Jilin Provincial Molecular Biology Research Center for Precision Medicine of Major Cardiovascular Disease, Jilin Provincial Cardiovascular Research Institute, Changchun, Jilin, China
- Jilin Provincial Precision Medicine Key Laboratory for Cardiovascular Genetic Diagnosis, Changchun, Jilin, China
| | - Fanbo Meng
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
- Jilin Provincial Engineering Laboratory for Endothelial Function and Genetic Diagnosis of Cardiovascular Disease, Changchun, Jilin, China
- Jilin Provincial Molecular Biology Research Center for Precision Medicine of Major Cardiovascular Disease, Jilin Provincial Cardiovascular Research Institute, Changchun, Jilin, China
- Jilin Provincial Precision Medicine Key Laboratory for Cardiovascular Genetic Diagnosis, Changchun, Jilin, China
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2
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Wei M, Lu Z, Zhang H, Fan X, Zhang X, Jiang B, Li J, Xue M. Aspirin and Celecoxib Regulate Notch1/Hes1 Pathway to Prevent Pressure Overload-Induced Myocardial Hypertrophy. Int Heart J 2024; 65:475-486. [PMID: 38825493 DOI: 10.1536/ihj.23-614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
This study aimed to investigate the molecular mechanisms underlying the protective effects of cyclooxygenase (cox) inhibitors against myocardial hypertrophy.Rat H9c2 cardiomyocytes were induced by mechanical stretching. SD rats underwent transverse aortic constriction to induce pressure overload myocardial hypertrophy. Rats were subjected to echocardiography and tail arterial pressure in 12W. qPCR and western blot were used to detect the expression of Notch-related signaling. The inflammatory factors were tested by ELISA in serum, heart tissue, and cell culture supernatant.Compared with control, levels of pro-inflammatory cytokines IL-6, TNF-α, and IL-1β were increased and anti-inflammatory cytokine IL-10 was reduced in myocardial tissues and serum of rat models. Levels of Notch1 and Hes1 were reduced in myocardial tissues. However, cox inhibitor treatment (aspirin and celecoxib), the improvement of exacerbated myocardial hypertrophy, fibrosis, dysfunction, and inflammation was parallel to the activation of Notch1/Hes1 pathway. Moreover, in vitro experiments showed that, in cardiomyocyte H9c2 cells, application of ~20% mechanical stretching activated inflammatory mediators (IL-6, TNF-α, and IL-1β) and hypertrophic markers (ANP and BNP). Moreover, expression levels of Notch1 and Hes1 were decreased. These changes were effectively alleviated by aspirin and celecoxib.Cox inhibitors may protect heart from hypertrophy and inflammation possibly via the Notch1/Hes1 signaling pathway.
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Affiliation(s)
- Minghui Wei
- School of Basic Medicine, Inner Mongolia Medical University
| | - Ziyu Lu
- School of Basic Medicine, Inner Mongolia Medical University
| | - Haifeng Zhang
- Office of Academic Affairs, Inner Mongolia Medical University
| | - Xiaomei Fan
- Department of Physiology, Inner Mongolia Medical University
| | - Xin Zhang
- Department of Physiology, Inner Mongolia Medical University
| | - Bihui Jiang
- School of Basic Medicine, Inner Mongolia Medical University
| | - Jianying Li
- School of Basic Medicine, Inner Mongolia Medical University
| | - Mingming Xue
- Office of Academic Affairs, Inner Mongolia Medical University
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3
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Rocca C, Soda T, De Francesco EM, Fiorillo M, Moccia F, Viglietto G, Angelone T, Amodio N. Mitochondrial dysfunction at the crossroad of cardiovascular diseases and cancer. J Transl Med 2023; 21:635. [PMID: 37726810 PMCID: PMC10507834 DOI: 10.1186/s12967-023-04498-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 09/01/2023] [Indexed: 09/21/2023] Open
Abstract
A large body of evidence indicates the existence of a complex pathophysiological relationship between cardiovascular diseases and cancer. Mitochondria are crucial organelles whose optimal activity is determined by quality control systems, which regulate critical cellular events, ranging from intermediary metabolism and calcium signaling to mitochondrial dynamics, cell death and mitophagy. Emerging data indicate that impaired mitochondrial quality control drives myocardial dysfunction occurring in several heart diseases, including cardiac hypertrophy, myocardial infarction, ischaemia/reperfusion damage and metabolic cardiomyopathies. On the other hand, diverse human cancers also dysregulate mitochondrial quality control to promote their initiation and progression, suggesting that modulating mitochondrial homeostasis may represent a promising therapeutic strategy both in cardiology and oncology. In this review, first we briefly introduce the physiological mechanisms underlying the mitochondrial quality control system, and then summarize the current understanding about the impact of dysregulated mitochondrial functions in cardiovascular diseases and cancer. We also discuss key mitochondrial mechanisms underlying the increased risk of cardiovascular complications secondary to the main current anticancer strategies, highlighting the potential of strategies aimed at alleviating mitochondrial impairment-related cardiac dysfunction and tumorigenesis. It is hoped that this summary can provide novel insights into precision medicine approaches to reduce cardiovascular and cancer morbidities and mortalities.
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Affiliation(s)
- Carmine Rocca
- Cellular and Molecular Cardiovascular Pathophysiology Laboratory, Department of Biology, E and E.S. (DiBEST), University of Calabria, Arcavacata di Rende, 87036, Cosenza, Italy
| | - Teresa Soda
- Department of Health Science, University Magna Graecia of Catanzaro, 88100, Catanzaro, Italy
| | - Ernestina Marianna De Francesco
- Endocrinology Unit, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122, Catania, Italy
| | - Marco Fiorillo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036, Rende, Italy
| | - Francesco Moccia
- Laboratory of General Physiology, Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, 27100, Pavia, Italy
| | - Giuseppe Viglietto
- Department of Experimental and Clinical Medicine, Magna Graecia University of Catanzaro, 88100, Catanzaro, Italy
| | - Tommaso Angelone
- Cellular and Molecular Cardiovascular Pathophysiology Laboratory, Department of Biology, E and E.S. (DiBEST), University of Calabria, Arcavacata di Rende, 87036, Cosenza, Italy.
- National Institute of Cardiovascular Research (I.N.R.C.), 40126, Bologna, Italy.
| | - Nicola Amodio
- Department of Experimental and Clinical Medicine, Magna Graecia University of Catanzaro, 88100, Catanzaro, Italy.
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Xu QR, Liu JL, Zhu RR, Huang WX, Huang H, Liu JC, Xu XP, Zhou XL. NSD2 promotes pressure overload-induced cardiac hypertrophy via activating circCmiss1/TfR1/ferroptosis signaling. Life Sci 2023:121873. [PMID: 37352916 DOI: 10.1016/j.lfs.2023.121873] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/14/2023] [Accepted: 06/16/2023] [Indexed: 06/25/2023]
Abstract
Heart failure typically occurs early in the clinical course of sustained cardiac hypertrophy that is accompanied by maladaptive remodeling of the heart. It is critical to discover new mechanisms and effective therapeutic targets to prevent and cure pathological cardiac hypertrophy. The objective of the study was to evaluate the effects of circRNAs on NSD2-induced ventricular remodeling. We screened the dysregulated circRNAs in normal or NSD2-/- C57BL/6 mice with or without transverse aortic constriction (TAC), and found that circCmss1 significantly increased in normal TAC mice, but decreased in NSD2-/- TAC mice. Angiotensin II(Ang II)induced neonatal cardiomyocyte hypertrophy in vitro and the pressure overload-induced cardiac hypertrophy in vivo can be reduced by Knocking down circCmss1. We further investigated the downstream signaling of circCmss1 in the progression of NSD2-promoted ventricular remodeling and discovered that circCmss1 could interact with a transcription factor EIF4A3 and induce the expression of transferrin receptor 1 (TfR1), thus activating the ferroptosis in cardiomyocytes. This study highlights the significance of NSD2 activation of circCmss1/EIF4A3/TfR1 as therapeutic targets for treating pathological myocardial hypertrophy.
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Affiliation(s)
- Qi-Rong Xu
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Jin-Long Liu
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Rong-Rong Zhu
- Department of Cardiology, Jiangxi Hospital of Traditional Chinese Medicine, Jiangxi University of Chinese Medicine, China
| | - Wen-Xiong Huang
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Huang Huang
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Ji-Chun Liu
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Xin-Ping Xu
- Jiangxi Institute of Respiratory Disease, The First Affiliated Hospital, Nanchang University, China.
| | - Xue-Liang Zhou
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, China.
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5
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Mo D, Liu C, Chen Y, Cheng X, Shen J, Zhao L, Zhang J. The mitochondrial ribosomal protein mRpL4 regulates Notch signaling. EMBO Rep 2023; 24:e55764. [PMID: 37009823 PMCID: PMC10240210 DOI: 10.15252/embr.202255764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 03/07/2023] [Accepted: 03/18/2023] [Indexed: 04/04/2023] Open
Abstract
Mitochondrial ribosomal proteins (MRPs) assemble as specialized ribosome to synthesize mtDNA-encoded proteins, which are essential for mitochondrial bioenergetic and metabolic processes. MRPs are required for fundamental cellular activities during animal development, but their roles beyond mitochondrial protein translation are poorly understood. Here, we report a conserved role of the mitochondrial ribosomal protein L4 (mRpL4) in Notch signaling. Genetic analyses demonstrate that mRpL4 is required in the Notch signal-receiving cells to permit target gene transcription during Drosophila wing development. We find that mRpL4 physically and genetically interacts with the WD40 repeat protein wap and activates the transcription of Notch signaling targets. We show that human mRpL4 is capable of replacing fly mRpL4 during wing development. Furthermore, knockout of mRpL4 in zebrafish leads to downregulated expression of Notch signaling components. Thus, we have discovered a previously unknown function of mRpL4 during animal development.
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Affiliation(s)
- Dongqing Mo
- Department of Plant Biosecurity and MOA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant ProtectionChina Agricultural UniversityBeijingChina
| | - Chenglin Liu
- Institute of Evolution & Marine BiodiversityOcean University of ChinaQingdaoChina
- College of FisheriesOcean University of ChinaQingdaoChina
- Key Laboratory of Mariculture (OUC)Ministry of EducationQingdaoChina
| | - Yao Chen
- Department of Plant Biosecurity and MOA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant ProtectionChina Agricultural UniversityBeijingChina
| | - Xinkai Cheng
- Institute of Evolution & Marine BiodiversityOcean University of ChinaQingdaoChina
- College of FisheriesOcean University of ChinaQingdaoChina
- Key Laboratory of Mariculture (OUC)Ministry of EducationQingdaoChina
| | - Jie Shen
- Department of Plant Biosecurity and MOA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant ProtectionChina Agricultural UniversityBeijingChina
| | - Long Zhao
- Institute of Evolution & Marine BiodiversityOcean University of ChinaQingdaoChina
- College of FisheriesOcean University of ChinaQingdaoChina
- Key Laboratory of Mariculture (OUC)Ministry of EducationQingdaoChina
| | - Junzheng Zhang
- Department of Plant Biosecurity and MOA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant ProtectionChina Agricultural UniversityBeijingChina
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6
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Xu Q, Liu S, Gong Q, Zhu R, Liu J, Wu Q, Zhou X. Notch1 Protects against Ischemic-Reperfusion Injury by Suppressing PTEN-Pink1-Mediated Mitochondrial Dysfunction and Mitophagy. Cells 2022; 12:cells12010137. [PMID: 36611931 PMCID: PMC9818205 DOI: 10.3390/cells12010137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/18/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Myocardial ischemia/reperfusion injury is associated with adverse cardiovascular outcomes after acute myocardial infarction. However, the molecular mechanism of ischemia/reperfusion injury remains unclear. Mitochondria dysfunction is a participant in and regulator of myocardial ischemia-reperfusion injury. However, the molecular mechanisms involved in this process are not yet fully understood. We previously reported that Notch1 can reduce mitochondrial lysis, reduce myocardial infarct size, and inhibit ventricular remodeling. Herein, we explore the role of the downstream target Notch1 in mitochondrial regulation. METHODS This study constructs an ischemic/reperfusion injury rat model and a hypoxia/reoxygenation cell model. The expression of PTEN is detected by real-time PCR, Western blot, and immunofluorescence staining. Cell viability is analyzed with CCK-8. Apoptosis level is detected via the TUNEL assay, and mitochondrial fission/fusion is analyzed with MitoTracker Green staining. Cardiac troponin I (cTnI), lactate dehydrogenase (LDH), superoxide dismutase (SOD), and CK levels of creatine kinase-MB (CK) are measured with ELISA kits. RESULTS We found that PETN-Pink1-Parkin signaling is inhibited by Notch1 I/R in injured neonatal cardiomyocytes and hearts, i.e., via the inhibition of mitochondrial dysfunction and fragmentation. With the recure of PTEN or Pink1, the protective effect of Notch1 was largely diminished. CONCLUSION These results suggest that N1ICD acts protectively against ischemic reperfusion injury by suppressing PTEN-Pink1-mediated mitochondrial dysfunction and fragmentation.
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Affiliation(s)
- Qirong Xu
- Department of Thoracic Surgery, The First Affiliated Hospital, Nanchang University, Nanchang 330006, China
| | - Sheng Liu
- Department of Cardiac Surgery, The First Affiliated Hospital, Nanchang University, Nanchang 330006, China
| | - Qiang Gong
- Department of Cardiac Surgery, The First Affiliated Hospital, Nanchang University, Nanchang 330006, China
| | - Rongrong Zhu
- Department of Cardiology, Jiangxi Hospital of Traditional Chinese Medicine, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Jichun Liu
- Department of Cardiac Surgery, The First Affiliated Hospital, Nanchang University, Nanchang 330006, China
| | - Qicai Wu
- Department of Cardiac Surgery, The First Affiliated Hospital, Nanchang University, Nanchang 330006, China
- Correspondence: (Q.W.); (X.Z.)
| | - Xueliang Zhou
- Department of Cardiac Surgery, The First Affiliated Hospital, Nanchang University, Nanchang 330006, China
- Correspondence: (Q.W.); (X.Z.)
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7
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Xiao Y, Wang J, Wang J, Wang H, Wu S, Bao W. Analysis of the roles of the Notch1 signalling pathway in modulating deoxynivalenol cytotoxicity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 246:114183. [PMID: 36270035 DOI: 10.1016/j.ecoenv.2022.114183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 10/09/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Deoxynivalenol (DON) is a trichothecenes produced by fungi that is widespread and poses a threat to human and animal health. The Notch1 signalling pathway is tightly involved in cell fate determination. The aim of this study was to investigate the role of the Notch1 signalling pathway in DON exposure. Herein, we found that the Notch1 signalling pathway was significantly activated after DON exposure, while Notch1 expression was negatively regulated by DON-induced ROS. Then, the Notch1 signalling pathway was blocked by the γ-secretase inhibitor DAPT in DON exposure. Flow cytometry analysis and antioxidant parameter measurements revealed that DAPT treatment significantly aggravated the oxidative stress induced by DON. The detection of apoptosis showed that DAPT treatment increased the cell apoptotic rate. Further analysis revealed that inhibiting the Notch1 signalling pathway reduced autophagy upon DON exposure. RT-qPCR and Western blot analysis showed that inhibiting the Notch1 signalling pathway aggravated cellular inflammation and activated the MAPK pathway, indicating that the MAPK pathway may be the downstream signalling pathway. Taken together, our research revealed that the Notch1 signalling pathway is essential for protection against DON. Inhibition of Notch1 signalling increases oxidative stress, causes cell apoptosis, reduces autophagy and aggravates cell inflammation after DON exposure. This study investigated the role of the Notch1 signalling pathway in DON exposure and provided a basis for exploring the mechanism of DON.
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Affiliation(s)
- Yeyi Xiao
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Jie Wang
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Jingneng Wang
- Shanghai Xiongtu Biotechnology Co., Ltd., Shanghai 200000, China.
| | - Haifei Wang
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Shenglong Wu
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Wenbin Bao
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; Shanghai Xiongtu Biotechnology Co., Ltd., Shanghai 200000, China.
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8
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The Role of the Notch Signaling Pathway in Recovery of Cardiac Function after Myocardial Infarction. Int J Mol Sci 2022; 23:ijms232012509. [PMID: 36293363 PMCID: PMC9604421 DOI: 10.3390/ijms232012509] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/06/2022] [Accepted: 10/14/2022] [Indexed: 11/17/2022] Open
Abstract
Myocardial infarction (MI) is a pathological process, evidencing as massive death of cardiomyocytes associated with hypoxic and oxidative stress. The formation of areas of fibrosis ultimately leads to heart failure. There are some mechanisms that contribute to the functional repair of the heart. In most mammals, including humans, the Notch signaling pathway has cardioprotective effects. It is involved in the formation of the heart in embryogenesis and in the restoration of cardiac function after MI due to: (1) reducing oxidative stress; (2) prevention of apoptosis; (3) regulation of inflammation; (4) containment of fibrosis and hypertrophy of cardiomyocytes; (5) tissue revascularization; and (6) regulation of proliferation and differentiation of cardiomyocytes. In addition, the Notch signaling pathway interacts with other signaling cascades involved in the pathogenesis of MI and subsequent cardiac repair. In this review, we consider the Notch signaling pathway as a potential target for therapeutic approaches aimed at improving cardiac recovery after MI.
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9
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Lee MJ, Zhu J, An JH, Lee SE, Kim TY, Oh E, Kang YE, Chung W, Heo JY. A transcriptomic analysis of cerebral microvessels reveals the involvement of Notch1 signaling in endothelial mitochondrial-dysfunction-dependent BBB disruption. Fluids Barriers CNS 2022; 19:64. [PMID: 36028880 PMCID: PMC9414148 DOI: 10.1186/s12987-022-00363-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/10/2022] [Indexed: 11/26/2022] Open
Abstract
Background Endothelial cells (ECs) in cerebral vessels are considered the primary targets in acute hemorrhagic brain injuries. EC dysfunction can aggravate neuronal injuries by causing secondary inflammatory responses and blood–brain barrier (BBB) disruption. Previous studies have reported that enhancement of mitochondrial function within ECs may reduce BBB disruption and decrease the severity of acute brain injuries. However, the molecular signaling pathways through which enhanced EC mitochondrial function is enhanced to exert this BBB protective effect have not been fully elucidated. Methods To identify signaling pathways involved in linking EC-specific mitochondrial dysfunction and BBB disruption, we first performed RNA sequencing using isolated cerebral vessels from TEKCRIF1 KO mice, a mouse strain that displays EC-specific mitochondrial dysfunction. After identification, we assessed the significance of candidate signaling pathways using an intracerebral hemorrhage (ICH) mouse model. BBB integrity was assessed using an IgG leakage assay, and symptomatic changes were evaluated using behavioral assays. Results Transcriptome analyses of the TEKCRIF1 KO mouse revealed significant changes in Notch1 signaling, a pathway intimately involved in BBB maintenance. We also observed a decrease in Notch1 signaling and expression of the mitochondrial oxidative phosphorylation (OxPhos) complex in the ICH mouse model, which also exhibits BBB disruption. To further assess the function of Notch1 signaling in relation to BBB disruption, we injected ICH model mice with adropin, a protein that interacts with the Notch1 ligand NB-3 and activates Notch1 signaling. We found that adropin prevented BBB disruption and reduced the extent (area) of the injury compared with that in vehicle controls, in association with alteration of mitochondrial function. Conclusion These results suggest that the Notch1 signaling pathway acts as an upstream regulator of DEGs and can be a target to regulate the changes involved with endothelial mitochondrial dysfunction-dependent BBB disruption. Thus, treatment methods that activate Notch1 may be beneficial in acute brain injuries by protecting BBB integrity. Supplementary Information The online version contains supplementary material available at 10.1186/s12987-022-00363-7.
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Affiliation(s)
- Min Joung Lee
- Department of Biochemistry, Chungnam National University School of Medicine, Daejeon, 35015, Republic of Korea
| | - Jiebo Zhu
- Department of Biochemistry, Chungnam National University School of Medicine, Daejeon, 35015, Republic of Korea.,Brain Korea 21 FOUR Project for Medical Science, Chungnam National University, Daejeon, 35015, Republic of Korea.,Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, 35015, Republic of Korea
| | - Jong Hun An
- Department of Biochemistry, Chungnam National University School of Medicine, Daejeon, 35015, Republic of Korea.,Brain Korea 21 FOUR Project for Medical Science, Chungnam National University, Daejeon, 35015, Republic of Korea.,Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, 35015, Republic of Korea
| | - Seong Eun Lee
- Research Center for Endocrine and Metabolic Disease, College of Medicine, Chungnam National University, Daejeon, 35015, Republic of Korea.,Division of Endocrinology and Metabolism, Department of Internal Medicine, Chungnam National University School of Medicine, Deajeon, 35015, Republic of Korea
| | - Tae Yeon Kim
- Bio-Synergy Research Center, Daejeon, 34141, Republic of Korea
| | - Eungseok Oh
- Department of Neurology, Chungnam National University Hospital, Daejeon, 35015, Republic of Korea
| | - Yea Eun Kang
- Research Center for Endocrine and Metabolic Disease, College of Medicine, Chungnam National University, Daejeon, 35015, Republic of Korea. .,Division of Endocrinology and Metabolism, Department of Internal Medicine, Chungnam National University School of Medicine, Deajeon, 35015, Republic of Korea.
| | - Woosuk Chung
- Brain Korea 21 FOUR Project for Medical Science, Chungnam National University, Daejeon, 35015, Republic of Korea. .,Department of Anesthesiology and Pain Medicine, Chungnam National University School of Medicine, Daejeon, 35015, Republic of Korea. .,Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, 35015, Republic of Korea.
| | - Jun Young Heo
- Department of Biochemistry, Chungnam National University School of Medicine, Daejeon, 35015, Republic of Korea. .,Brain Korea 21 FOUR Project for Medical Science, Chungnam National University, Daejeon, 35015, Republic of Korea. .,Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, 35015, Republic of Korea.
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10
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Wang L, Lai S, Zou H, Zhou X, Wan Q, Luo Y, Wu Q, Wan L, Liu J, Huang H. Ischemic preconditioning/ischemic postconditioning alleviates anoxia/reoxygenation injury via the Notch1/Hes1/VDAC1 axis. J Biochem Mol Toxicol 2022; 36:e23199. [PMID: 35975741 DOI: 10.1002/jbt.23199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 07/06/2022] [Accepted: 08/05/2022] [Indexed: 11/07/2022]
Abstract
Ischemic preconditioning (IPC), and ischemic postconditioning (IPost) have a significant protective effect on myocardial ischemia/reperfusion (MI/R) injury by alleviating oxidative stress and mitochondrial disturbances, although the underlying molecular mechanisms are unclear. The study was to demonstrate that cardioprotection against anoxia/reoxygenation (A/R) injury is transduced via the Notch1/Hes1/VDAC1 signaling pathway. Using mass spectrometry and tandem affinity purification (TAP), to screen for differentially expressed proteins associated with Hes1, followed by standard bioinformatics analysis. The co-immunoprecipitation (Co-IP) assay confirmed an interaction between Hes1 and VDAC1 proteins. H9c2 cells were transfected with Hes1 adenoviral N-terminal TAP vector (AD-NTAP/Hes1) and Hes1-short hairpin RNA adenoviral vector (AD-Hes1-shRNA) to establish A/R injury, IPC, and IPost models, respectively. The expression of Hes1 and VDAC1 proteins were measured by western blot analysis, while the levels of reactive oxygen species (ROS), mitochondrial membrane potential (ΔΨm), and apoptosis were evaluated by flow cytometry. AD-NTAP/Hes1 can activate the exogenous protein expression of Hes1, thus decreasing creatine phosphokinase (CPK) and lactate dehydrogenase (LDH) activity and promoting cell viability. The study found that VDAC1 was a potential target protein for Hes1 and the overexpression of Hes1 protein expression downregulated protein expression levels of VDAC1, reduced ROS production, stabilized ΔΨm, and inhibited apoptosis in H9c2 cells. Additionally, downregulation of Hes1 protein expression also upregulated VDAC1 protein expression, increased ROS production, imbalanced ΔΨm, promoted cell apoptosis, and attenuated the cardioprotection afforded by IPC and IPost. The Notch1/Hes1 signaling pathway activated by IPC/IPost can directly downregulate the protein expression of VDAC1 and consequently relieve A/R injury.
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Affiliation(s)
- Lijun Wang
- Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.,Department of Cardiac Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | | | - Huaxi Zou
- Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.,Department of Cardiac Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Xueliang Zhou
- Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Qing Wan
- Department of Pharmacy, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Yong Luo
- Central Laboratory, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, China
| | - Qicai Wu
- Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Li Wan
- Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Jichun Liu
- Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.,Department of Cardiac Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Huang Huang
- Department of Cardiac Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
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11
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Lin J, Duan J, Wang Q, Xu S, Zhou S, Yao K. Mitochondrial Dynamics and Mitophagy in Cardiometabolic Disease. Front Cardiovasc Med 2022; 9:917135. [PMID: 35783853 PMCID: PMC9247260 DOI: 10.3389/fcvm.2022.917135] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/20/2022] [Indexed: 12/17/2022] Open
Abstract
Mitochondria play a key role in cellular metabolism. Mitochondrial dynamics (fusion and fission) and mitophagy, are critical to mitochondrial function. Fusion allows organelles to share metabolites, proteins, and mitochondrial DNA, promoting complementarity between damaged mitochondria. Fission increases the number of mitochondria to ensure that they are passed on to their offspring during mitosis. Mitophagy is a process of selective removal of excess or damaged mitochondria that helps improve energy metabolism. Cardiometabolic disease is characterized by mitochondrial dysfunction, high production of reactive oxygen species, increased inflammatory response, and low levels of ATP. Cardiometabolic disease is closely related to mitochondrial dynamics and mitophagy. This paper reviewed the mechanisms of mitochondrial dynamics and mitophagy (focus on MFN1, MFN2, OPA1, DRP1, and PINK1 proteins) and their roles in diabetic cardiomyopathy, myocardial infarction, cardiac hypertrophy, heart failure, atherosclerosis, and obesity.
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Affiliation(s)
- Jianguo Lin
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Jinlong Duan
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Qingqing Wang
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Siyu Xu
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Beijing University of Chinese Medicine, Beijing, China
| | - Simin Zhou
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Kuiwu Yao
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Eye Hospital China Academy of Chinese Medical Sciences, Beijing, China
- *Correspondence: Kuiwu Yao
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12
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MicroRNA-34a Promotes Ischemia-Induced Cardiomyocytes Apoptosis through Targeting Notch1. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:1388415. [PMID: 35265142 PMCID: PMC8901351 DOI: 10.1155/2022/1388415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 01/23/2022] [Accepted: 02/03/2022] [Indexed: 11/22/2022]
Abstract
Myocardial apoptosis occurs during myocardial ischemia. This study aimed to determine the effect of microRNA-34a (miR-34a) in ischemia-induced myocardial apoptosis. Mainly, SD rats were subjected to myocardial ischemia by ligaturing the left anterior descending branch of coronary artery. After rats had myocardial infarction, HE staining and TUNEL staining confirmed a significant increase in apoptosis. The expression of miR-34a was noticeably upregulated, while the expression of Notch1 was downregulated. An increase in caspase-3 and a decrease in Bcl-2/Bax ratio were observed in myocardium. Similar results were observed in the in vitro model of cardiomyocyte ischemia and anoxia of this study. When rat cardiomyocytes were administered with serum starvation and microaerophilic system, apoptosis-related proteins were significantly increased. However, transfecting the miR-34a inhibitor into the cardiomyocyte before the serum starvation and hypoxia treatment could increase the ratio of Bcl-2/Bax and downregulate the expression of caspase-3, as well as prevent cardiomyocytes from apoptosis. As opposed to the abovementioned points, the upregulation of miR-34a expression by transfecting miR-34a mimics induced Notch1 reduce and apoptosis-related proteins increase apparently, while upregulation of Notch1 could stimulate apoptosis attributed to miR-34a. Mechanistically, we demonstrated that Notch1 is a direct target of miR-34a. In conclusion, our current results suggested that miR-34a significantly stimulates ischemia-induced cardiomyocytes apoptosis by targeting Notch1.
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Wang C, Liu L, Wang Y, Xu D. Advances in the mechanism and treatment of mitochondrial quality control involved in myocardial infarction. J Cell Mol Med 2021; 25:7110-7121. [PMID: 34160885 PMCID: PMC8335700 DOI: 10.1111/jcmm.16744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/22/2021] [Accepted: 06/03/2021] [Indexed: 12/11/2022] Open
Abstract
Mitochondria are important organelles in eukaryotic cells. Normal mitochondrial homeostasis is subject to a strict mitochondrial quality control system, including the strict regulation of mitochondrial production, fission/fusion and mitophagy. The strict and accurate modulation of the mitochondrial quality control system, comprising the mitochondrial fission/fusion, mitophagy and other processes, can ameliorate the myocardial injury of myocardial ischaemia and ischaemia-reperfusion after myocardial infarction, which plays an important role in myocardial protection after myocardial infarction. Further research into the mechanism will help identify new therapeutic targets and drugs for the treatment of myocardial infarction. This article aims to summarize the recent research regarding the mitochondrial quality control system and its molecular mechanism involved in myocardial infarction, as well as the potential therapeutic targets in the future.
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Affiliation(s)
- Chunfang Wang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Leiling Liu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yishu Wang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Danyan Xu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
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14
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Drp1-dependent mitochondrial fission in cardiovascular disease. Acta Pharmacol Sin 2021; 42:655-664. [PMID: 32913266 DOI: 10.1038/s41401-020-00518-y] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 08/19/2020] [Indexed: 12/21/2022] Open
Abstract
Mitochondria are highly dynamic organelles undergoing cycles of fusion and fission to modulate their morphology, distribution, and function, which are referred as 'mitochondrial dynamics'. Dynamin-related protein 1 (Drp1) is known as the major pro-fission protein whose activity is tightly regulated to clear the damaged mitochondria via mitophagy, ensuring a strict control over the intricate process of cellular and organ dynamics in heart. Various posttranslational modifications (PTMs) of Drp1 have been identified including phosphorylation, SUMOylation, palmitoylation, ubiquitination, S-nitrosylation, and O-GlcNAcylation, which implicate a role in the regulation of mitochondrial dynamics. An intact mitochondrial homeostasis is critical for heart to fuel contractile function and cardiomyocyte metabolism, while defects in mitochondrial dynamics constitute an essential part of the pathophysiology underlying various cardiovascular diseases (CVDs). In this review, we summarize current knowledge on the critical role of Drp1 in the pathogenesis of CVDs including endothelial dysfunction, smooth muscle remodeling, cardiac hypertrophy, pulmonary arterial hypertension, myocardial ischemia-reperfusion, and myocardial infarction. We also highlight how the targeting of Drp1 could potentially contribute to CVDs treatments.
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15
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Liu K, Chen Y, Ai F, Li YQ, Zhang K, Zhang WT. PHLDA3 inhibition attenuates endoplasmic reticulum stress-induced apoptosis in myocardial hypoxia/reoxygenation injury by activating the PI3K/AKT signaling pathway. Exp Ther Med 2021; 21:613. [PMID: 33936270 PMCID: PMC8082641 DOI: 10.3892/etm.2021.10045] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 09/24/2020] [Indexed: 12/12/2022] Open
Abstract
Endoplasmic reticulum stress (ERS)-induced apoptosis serves a crucial role in the pathogenesis of myocardial ischemia/reperfusion injury (MIRI). Previous studies have confirmed that pleckstrin homology-like domain family A member 3 (PHLDA3) is an important mediator in ERS-associated apoptosis. The aim of the current study focused on whether PHLDA3 served protective effects on hypoxia/reoxygenation (H/R)-injured cardiomyocytes by inhibiting ERS-induced apoptosis. Furthermore, the molecular mechanisms associated with the PI3K/AKT signaling pathway were investigated. Primary neonatal rat cardiomyocytes were isolated and randomized into four groups: i) Control + adenovirus encoding scrambled short hairpin RNA (AdshRNA); ii) control + adenoviral vectors encoding PHLDA3 shRNA (AdshPHLDA3); iii) H/R+ AdshRNA and iv) H/R+AdshPHLDA3. AdshPHLDA3 was used to knock down PHLDA3. An H/R injury model was constructed by treatment with hypoxia for 4 h followed by reoxygenation for 6 h. A PI3K/AKT inhibitor, LY294002, was supplemented in mechanistic studies. Cell viability and LDH/CK releases were detected to evaluate myocardial damage. Flow cytometry assays were used to assess apoptotic response. Western blotting assays were used to detect protein expression. The results demonstrated that H/R induced myocardial damage and increased PHLDA3 expression. ERS-induced apoptosis was significantly increased following H/R injury, as indicated by increased apoptotic rates and ERS-associated protein expression, including those of CHOP, 78 kDa glucose-regulated protein and caspase-12. However, PHLDA3 inhibition following AdshPHLDA3 transfection reversed cell damage and ERS-associated apoptosis on H/R injury. Studies for molecular mechanisms concluded that the apoptosis-inhibition effects and cardioprotective roles of PHLDA3 inhibition were induced partly by the activation of the PI3K/AKT pathway, which was verified by LY294002 treatment. In conclusion, in the process of H/R injury, PHLDA3 inhibition reduced ERS-induced apoptosis and H/R injury by activating the PI3K/AKT pathway. PHLDA3 may be a therapeutic target for the treatment of MIRI.
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Affiliation(s)
- Kai Liu
- Department of Geriatric Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570311, P.R. China
| | - Ying Chen
- Department of Geriatric Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570311, P.R. China
| | - Fen Ai
- Department of Emergency, The Central Hospital of Wuhan, Tongji Medical College, Hua Zhong University of Science and Technology, Wuhan, Hubei 430000, P.R. China
| | - Yun-Qian Li
- Department of Geriatric Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570311, P.R. China
| | - Kun Zhang
- Department of Geriatric Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570311, P.R. China
| | - Wei-Tong Zhang
- Department of General Surgery, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570311, P.R. China
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Chen Y, Li S, Zhang Y, Wang M, Li X, Liu S, Xu D, Bao Y, Jia P, Wu N, Lu Y, Jia D. The lncRNA Malat1 regulates microvascular function after myocardial infarction in mice via miR-26b-5p/Mfn1 axis-mediated mitochondrial dynamics. Redox Biol 2021; 41:101910. [PMID: 33667993 PMCID: PMC7937833 DOI: 10.1016/j.redox.2021.101910] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/16/2021] [Accepted: 02/17/2021] [Indexed: 02/07/2023] Open
Abstract
RATIONALE Myocardial infarction (MI) is a leading cause of cardiovascular mortality globally. The improvement of microvascular function is critical for cardiac repair after MI. Evidence now points to long non-coding RNAs (lncRNAs) as key regulators of cardiac remodelling processes. The lncRNA Malat1 is involved in the development and progression of multiple cardiac diseases. Studies have shown that Malat1 is closely related to the regulation of endothelial cell regeneration. However, the potential molecular mechanisms of Malat1 in repairing cardiac microvascular dysfunction after MI remain unreported. METHODS AND RESULTS The present study found that Malat1 is upregulated in the border zone of infarction in mouse hearts, as well as in isolated cardiac microvascular endothelial cells (CMECs). Targeted knockdown of Malat1 in endothelial cells exacerbated oxidative stress, attenuated angiogenesis and microvascular perfusion, and as a result decreased cardiac function in MI mice. Further studies showed that silencing Malat1 obviously inhibited CMEC proliferation, migration and tube formation, which was at least in part attributed to disturbed mitochondrial dynamics and activation of the mitochondrial apoptosis pathway. Moreover, bioinformatic analyses, luciferase assays and pull-down assays indicated that Malat1 acted as a competing endogenous RNA (ceRNA) for miR-26b-5p and formed a signalling axis with Mfn1 to regulate mitochondrial dynamics and endothelial functions. Overexpression of Mfn1 markedly reversed the microvascular dysfunction and CMEC injuries that were aggravated by silencing Malat1 via inhibition of excessive mitochondrial fragments and mitochondria-dependent apoptosis. CONCLUSIONS The present study elucidated the functions and mechanisms of Malat1 in cardiac microcirculation repair after MI. The underlying mechanisms of the effects of Malat1 could be attributed to its blocking effects on miR-26b-5p/Mfn1 pathway-mediated mitochondrial dynamics and apoptosis.
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Affiliation(s)
- Yuqiong Chen
- Department of Cardiology, The First Affiliated Hospital of China Medical University, 155 North Nanjing Street, Heping, Shenyang, Liaoning, 110001, PR China
| | - Su Li
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yan Zhang
- Department of Anesthesiology, Xuzhou Central Hospital, The Affiliated XuZhou Hospital of Nanjing Medical University, No.199 Jiefang South Road, Quanshan District, Xuzhou, Jiangsu, 221009, PR China
| | - Mengshen Wang
- Department of Breast Surgery, The First Affiliated Hospital of China Medical University, 155 North Nanjing Street, Shenyang, Liaoning Province, 110001, China
| | - Xinyan Li
- Department of Breast Surgery, The First Affiliated Hospital of China Medical University, 155 North Nanjing Street, Shenyang, Liaoning Province, 110001, China
| | - Shuang Liu
- Department of Emergency Medicine, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Dengyue Xu
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, China; Postgraduate College, China Medical University, Shenyang, China
| | - Yandong Bao
- Department of Cardiology, The First Affiliated Hospital of China Medical University, 155 North Nanjing Street, Heping, Shenyang, Liaoning, 110001, PR China
| | - Pengyu Jia
- Department of Cardiology, The First Affiliated Hospital of China Medical University, 155 North Nanjing Street, Heping, Shenyang, Liaoning, 110001, PR China
| | - Nan Wu
- The Central Laboratory, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yao Lu
- Department of Cardiology, Xuzhou Central Hospital, The Affiliated XuZhou Hospital of Nanjing Medical University, No.199 Jiefang South Road, Quanshan District, Xuzhou, Jiangsu, 221009, PR China.
| | - Dalin Jia
- Department of Cardiology, The First Affiliated Hospital of China Medical University, 155 North Nanjing Street, Heping, Shenyang, Liaoning, 110001, PR China.
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Zheng J, Lu C. Oxidized LDL Causes Endothelial Apoptosis by Inhibiting Mitochondrial Fusion and Mitochondria Autophagy. Front Cell Dev Biol 2020; 8:600950. [PMID: 33262989 PMCID: PMC7686653 DOI: 10.3389/fcell.2020.600950] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 10/20/2020] [Indexed: 12/11/2022] Open
Abstract
Oxidized low-density lipoprotein (ox-LDL)-induced endothelial dysfunction is an initial step toward atherosclerosis development. Mitochondria damage correlates with ox-LDL-induced endothelial injury through an undefined mechanism. We explored the role of optic atrophy 1 (Opa1)-related mitochondrial fusion and mitophagy in ox-LDL-treated endothelial cells, focusing on mitochondrial damage and cell apoptosis. Oxidized low-density lipoprotein treatment reduced endothelial cell viability by increasing apoptosis. Endothelial cell proliferation and migration were also impaired by ox-LDL. At the molecular level, mitochondrial dysfunction was induced by ox-LDL, as demonstrated by decreased mitochondrial membrane potential, increased mitochondrial reactive oxygen species production, augmented mitochondrial permeability transition pore openings, and elevated caspase-3/9 activity. Mitophagy and mitochondrial fusion were also impaired by ox-LDL. Opa1 overexpression reversed this effect by increasing endothelial cell viability and decreasing apoptosis. Interestingly, inhibition of mitophagy or mitochondrial fusion through transfection of siRNAs against Atg5 or Mfn2, respectively, abolished the protective effects of Opa1. Our results illustrate the role of Opa1-related mitochondrial fusion and mitophagy in sustaining endothelial cell viability and mitochondrial homeostasis under ox-LDL stress.
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Affiliation(s)
- Jia Zheng
- Department of Cardiology, Tianjin First Center Hospital, Tianjin, China
| | - Chengzhi Lu
- Department of Cardiology, Tianjin First Center Hospital, Tianjin, China
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18
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Ajoolabady A, Aslkhodapasandhokmabad H, Aghanejad A, Zhang Y, Ren J. Mitophagy Receptors and Mediators: Therapeutic Targets in the Management of Cardiovascular Ageing. Ageing Res Rev 2020; 62:101129. [PMID: 32711157 DOI: 10.1016/j.arr.2020.101129] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 07/10/2020] [Accepted: 07/19/2020] [Indexed: 12/17/2022]
Abstract
Mitophagy serves as a cardinal regulator in the maintenance of mitochondrial integrity, function, and cardiovascular homeostasis, through the fine control and governance of cellular metabolism, ATP production, redox balance, and mitochondrial quality and quantity control. As a unique form of selective autophagy, mitophagy specifically recognizes and engulfs long-lived or damaged (depolarized) mitochondria through formation of the double-membraned intracellular organelles - mitophagosomes, ultimately resulting in lysosomal degradation. Levels of mitophagy are reported to be altered in pathological settings including cardiovascular diseases and biological ageing although the precise nature of mitophagy change in ageing and ageing-associated cardiovascular deterioration remains poorly defined. Ample clinical and experimental evidence has depicted a convincing tie between cardiovascular ageing and altered mitophagy. In particular, ageing perturbs multiple enigmatic various signal machineries governing mitophagy, mitochondrial quality, and mitochondrial function, contributing to ageing-elicited anomalies in the cardiovascular system. This review will update novel regulatory mechanisms of mitophagy especially in the perspective of advanced ageing, and discuss how mitophagy dysregulation may be linked to cardiovascular abnormalities in ageing. We hope to pave the way for development of new therapeutic strategies against the growing health and socieconomical issue of cardiovascular ageing through targeting mitophagy.
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19
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Dai SH, Wu QC, Zhu RR, Wan XM, Zhou XL. Notch1 protects against myocardial ischaemia-reperfusion injury via regulating mitochondrial fusion and function. J Cell Mol Med 2020; 24:3183-3191. [PMID: 31975567 PMCID: PMC7077547 DOI: 10.1111/jcmm.14992] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 12/16/2019] [Accepted: 12/21/2019] [Indexed: 01/29/2023] Open
Abstract
Mitochondrial fusion and fission dynamic are critical to the myocardial protection against ischaemia‐reperfusion injury. Notch1 signalling plays an important role in heart development, maturation and repair. However, the role of Notch1 in the myocardial mitochondrial fusion and fission dynamic remains elusive. Here, we isolated myocardial cells from rats and established myocardial ischaemia‐reperfusion injury (IRI) model. We modulated Notch1, MFN1 and DRP1 expression levels in myocardial cells via infection with recombinant adenoviruses. The results showed that Notch1 improves the cell viability and mitochondrial fusion in myocardiocytes exposed to IRI. These improvements were dependent on the regulation of MFN1 and DRP1. On the mechanism, we found that MNF1 is transcriptionally activated by RBP‐Jk in myocardiocytes. Notch1 also improves the mitochondrial membrane potential in myocardiocytes exposed to IRI. Moreover, we further confirmed the protection of the Notch1‐MFN1/Drp1 axis on the post‐ischaemic recovery of myocardial performance is associated with the preservation of the mitochondrial structure. In conclusion, this study presented a detailed mechanism by which Notch1 signalling improves mitochondrial fusion during myocardial protection.
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Affiliation(s)
- Shao-Hua Dai
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, 330006, China
| | - Qi-Cai Wu
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, 330006, China
| | - Rong-Rong Zhu
- Department of Obstetrics and Gynecology, High-tech hospital, The First Affiliated Hospital, Nanchang University, Nanchang, 330096, China
| | - Xue-Mei Wan
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, 330006, China
| | - Xue-Liang Zhou
- Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanchang University, Nanchang, 330006, China
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