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Wang G, Feng L, Liu C, Han Z, Chen X. MiR-378 Inhibits Angiotensin II-Induced Cardiomyocyte Hypertrophy by Targeting AKT2. Int Heart J 2024; 65:528-536. [PMID: 38825497 DOI: 10.1536/ihj.23-485] [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
Cardiomyocyte hypertrophy plays a crucial role in heart failure development, potentially leading to sudden cardiac arrest and death. Previous studies suggest that micro-ribonucleic acids (miRNAs) show promise for the early diagnosis and treatment of cardiomyocyte hypertrophy.To investigate the miR-378 expression in the cardiomyocyte hypertrophy model, reverse transcription-polymerase chain reaction (RT-qPCR), Western blot, and immunofluorescence tests were conducted in angiotensin II (Ang II)-induced H9c2 cells and Ang II-induced mouse model of cardiomyocyte hypertrophy. The functional interaction between miR-378 and AKT2 was studied by dual-luciferase reporter, RNA pull-down, Western blot, and RT-qPCR assays.The results of RT-qPCR analysis showed the downregulated expression of miR-378 in both the cell and animal models of cardiomyocyte hypertrophy. It was observed that the introduction of the miR-378 mimic inhibited the hypertrophy of cardiomyocytes induced by Ang II. Furthermore, the co-transfection of AKT2 expression vector partially mitigated the negative impact of miR-378 overexpression on Ang II-induced cardiomyocytes. Molecular investigations provided evidence that miR-378 negatively regulated AKT2 expression by interacting with the 3' untranslated region (UTR) of AKT2 mRNA.Decreased miR-378 expression and AKT2 activation are linked to Ang II-induced cardiomyocyte hypertrophy. Targeting miR-378/AKT2 axis offers therapeutic opportunity to alleviate cardiomyocyte hypertrophy.
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Affiliation(s)
- Guili Wang
- Department of Laboratory Medicine, Beijing Xiaotangshan Hospital
| | - Linlin Feng
- Department of Laboratory Medicine, Beijing Xiaotangshan Hospital
| | - Chunxiang Liu
- Department of Ultrasound, Beijing Xiaotangshan Hospital
| | - Zongqiang Han
- Department of Laboratory Medicine, Beijing Xiaotangshan Hospital
| | - Xia Chen
- Department of Laboratory Medicine, Beijing Xiaotangshan Hospital
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Gao S, Yang Q, Peng Y, Kong W, Liu Z, Li Z, Chen J, Bao M, Li X, Zhang Y, Bian X, Jin L, Zhang H, Zhang Y, Sanchis D, Yan F, Ye J. SIRT6 regulates obesity-induced oxidative stress via ENDOG/SOD2 signaling in the heart. Cell Biol Toxicol 2023; 39:1489-1507. [PMID: 35798905 DOI: 10.1007/s10565-022-09735-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 06/07/2022] [Indexed: 12/06/2022]
Abstract
The sirtuin 6 (SIRT6) participates in regulating glucose and lipid homeostasis. However, the function of SIRT6 in the process of cardiac pathogenesis caused by obesity-associated lipotoxicity remains to be unveiled. This study was designed to elucidate the role of SIRT6 in the pathogenesis of cardiac injury due to nutrition overload-induced obesity and explore the downstream signaling pathways affecting oxidative stress in the heart. In this study, we used Sirt6 cardiac-specific knockout murine models treated with a high-fat diet (HFD) feeding to explore the function and mechanism of SIRT6 in the heart tissue during HFD-induced obesity. We also took advantage of neonatal cardiomyocytes to study the role and downstream molecules of SIRT6 during HFD-induced injury in vitro, in which intracellular oxidative stress and mitochondrial content were assessed. We observed that during HFD-induced obesity, Sirt6 loss-of-function aggravated cardiac injury including left ventricular hypertrophy and lipid accumulation. Our results evidenced that upon increased fatty acid uptake, SIRT6 positively regulated the expression of endonuclease G (ENDOG), which is a mitochondrial-resident molecule that plays an important role in mitochondrial biogenesis and redox homeostasis. Our results also showed that SIRT6 positively regulated superoxide dismutase 2 (SOD2) expression post-transcriptionally via ENDOG. Our study gives a new sight into SIRT6 beneficial role in mitochondrial biogenesis of cardiomyocytes. Our data also show that SIRT6 is required to reduce intracellular oxidative stress in the heart triggered by high-fat diet-induced obesity, involving the control of ENDOG/SOD2.
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Affiliation(s)
- Shuya Gao
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210006, China
| | - Qingchen Yang
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210006, China
| | - Yue Peng
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Weixian Kong
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Zekun Liu
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Zhe Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Jiawen Chen
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210006, China
| | - Mengmeng Bao
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Xie Li
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Yubin Zhang
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Xiaohong Bian
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Liang Jin
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Hanwen Zhang
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Yuexin Zhang
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China
| | - Daniel Sanchis
- Institut de Recerca Biomedica de Lleida (IRBLLEIDA), Universitat de Lleida, Edifici Biomedicina-I, Av. Rovira Roure 80, 25198, Lleida, Spain.
| | - Fangrong Yan
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210006, China.
| | - Junmei Ye
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210006, China.
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Kong W, Peng Y, Ji C, Liu Z, Gao S, Zhang Y, Chen J, Li X, Bao M, Zhang Y, Jiang Q, Wang F, Li Z, Bian X, Ye J. Akt2 deficiency alleviates oxidative stress in the heart and liver via up-regulating SIRT6 during high-fat diet-induced obesity. Clin Sci (Lond) 2023; 137:823-841. [PMID: 37184210 DOI: 10.1042/cs20230433] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 05/12/2023] [Accepted: 05/15/2023] [Indexed: 05/16/2023]
Abstract
The present study aims to investigate the role of AKT2 in the pathogenesis of hepatic and cardiac lipotoxicity induced by lipid overload-induced obesity and identify its downstream targets. WT and Akt2 KO mice were fed either normal diet, or high-fat diet (HFD) to induce obesity model in vivo. Human hepatic cell line (L02 cells) and neonatal rat cardiomyocytes (NRCMs) were used as in vitro models. We observed that during HFD-induced obesity, Akt2 loss-of-function mitigated lipid accumulation and oxidative stress in the liver and heart tissue. Mechanistically, down-regulation of Akt2 promotes SIRT6 expression in L02 cells and NRCMs, the latter deacetylates SOD2, which promotes SOD2 activity and therefore alleviates oxidative stress-induced injury of hepatocytes and cardiomyocytes. Furthermore, we also proved that AKT2 inhibitor protects hepatocytes and cardiomyocytes from HFD-induced oxidative stress. Therefore, our work prove that AKT2 plays an important role in the regulation of obesity-induced lipid metabolic disorder in the liver and heart. Our study also indicates AKT2 inhibitor as a potential therapy for obesity-induced hepatic and cardiac injury.
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Affiliation(s)
- Weixian Kong
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Yue Peng
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Caoyu Ji
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing 210006, China
| | - Zekun Liu
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Shuya Gao
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing 210006, China
| | - Yuexin Zhang
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Jiawen Chen
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing 210006, China
| | - Xie Li
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Mengmeng Bao
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Yubin Zhang
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Qizhou Jiang
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Fuqun Wang
- Department of Gastroenterology, Meizhou People's Hospital, Meizhou 514031, China
| | - Zhe Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China
- Hubei Key Laboratory of Cardiology, Wuhan 430060, China
| | - Xiaohong Bian
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Junmei Ye
- College of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
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Metformin alleviates HFD-induced oxidative stress in hepatocyte via activating SIRT6/PGC-1α/ENDOG signaling. Clin Sci (Lond) 2022; 136:1711-1730. [DOI: 10.1042/cs20220242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 10/13/2022] [Accepted: 10/31/2022] [Indexed: 12/05/2022]
Abstract
Abstract
Metformin is accepted as a first-line drug for the therapy of Type 2 diabetes (T2D), while its mechanism is still controversial. In the present study, by taking advantage of mouse model of high-fat-diet (HFD)-induced obesity and primary mouse hepatocytes (PMHCs) as well as human hepatocyte L02 cell line, we aimed to investigate the involvement of SIRTs during the application of metformin for the therapy of T2D. Our data evidenced that during HFD-induced obesity, there was elevation of nucleus protein acetylation. Analysis of liver tissue showed that among all SIRT members, SIRT6 expression was significantly down-regulated during HFD feeding, which was sustained to regular level with metformin administration. Our result also showed that SIRT6 suppressed intracellular oxidative stress upon FAs stimulation in PMHCs and L02 cells. Mechanistically, SIRT6, but not SIRT1 promoted PGC-1α expression. We further prove that ENDOG is downstream of PGC-1α. In addition, we evidenced that ENDOG protects hepatocytes from lipid-induced oxidative stress, and down-regulation of Endog blunted the protective role of metformin in defending against FAs-induced oxidative stress. Our study established a novel mechanism of metformin in counteracting lipid-induced hepatic injury via activating SIRT6/PGC-1α/ENDOG signaling, thus providing novel targets of metformin in the therapy of T2D.
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Liu B, Ou WC, Fang L, Tian CW, Xiong Y. Myocyte Enhancer Factor 2A Plays a Central Role in the Regulatory Networks of Cellular Physiopathology. Aging Dis 2022; 14:331-349. [PMID: 37008050 PMCID: PMC10017154 DOI: 10.14336/ad.2022.0825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 08/25/2022] [Indexed: 11/18/2022] Open
Abstract
Cell regulatory networks are the determinants of cellular homeostasis. Any alteration to these networks results in the disturbance of cellular homeostasis and induces cells towards different fates. Myocyte enhancer factor 2A (MEF2A) is one of four members of the MEF2 family of transcription factors (MEF2A-D). MEF2A is highly expressed in all tissues and is involved in many cell regulatory networks including growth, differentiation, survival and death. It is also necessary for heart development, myogenesis, neuronal development and differentiation. In addition, many other important functions of MEF2A have been reported. Recent studies have shown that MEF2A can regulate different, and sometimes even mutually exclusive cellular events. How MEF2A regulates opposing cellular life processes is an interesting topic and worthy of further exploration. Here, we reviewed almost all MEF2A research papers published in English and summarized them into three main sections: 1) the association of genetic variants in MEF2A with cardiovascular disease, 2) the physiopathological functions of MEF2A, and 3) the regulation of MEF2A activity and its regulatory targets. In summary, multiple regulatory patterns for MEF2A activity and a variety of co-factors cause its transcriptional activity to switch to different target genes, thereby regulating opposing cell life processes. The association of MEF2A with numerous signaling molecules establishes a central role for MEF2A in the regulatory network of cellular physiopathology.
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Affiliation(s)
- Benrong Liu
- Department of Cardiology, Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, the Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.
- Correspondence should be addressed to: Dr. Benrong Liu, the Second Affiliated Hospital, Guangzhou Medical University, Guangdong, China. E-mail: ; or Yujuan Xiong, Panyu Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangdong, China. .
| | - Wen-Chao Ou
- Department of Cardiology, Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, the Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.
| | - Lei Fang
- Department of Cardiology, Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, the Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.
| | - Chao-Wei Tian
- General Practice, the Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.
| | - Yujuan Xiong
- Department of Laboratory Medicine, Panyu Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China.
- Correspondence should be addressed to: Dr. Benrong Liu, the Second Affiliated Hospital, Guangzhou Medical University, Guangdong, China. E-mail: ; or Yujuan Xiong, Panyu Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangdong, China. .
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Coudert L, Osseni A, Gangloff YG, Schaeffer L, Leblanc P. The ESCRT-0 subcomplex component Hrs/Hgs is a master regulator of myogenesis via modulation of signaling and degradation pathways. BMC Biol 2021; 19:153. [PMID: 34330273 PMCID: PMC8323235 DOI: 10.1186/s12915-021-01091-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 07/09/2021] [Indexed: 11/30/2022] Open
Abstract
Background Myogenesis is a highly regulated process ending with the formation of myotubes, the precursors of skeletal muscle fibers. Differentiation of myoblasts into myotubes is controlled by myogenic regulatory factors (MRFs) that act as terminal effectors of signaling cascades involved in the temporal and spatial regulation of muscle development. Such signaling cascades converge and are controlled at the level of intracellular trafficking, but the mechanisms by which myogenesis is regulated by the endosomal machinery and trafficking is largely unexplored. The Endosomal Sorting Complex Required for Transport (ESCRT) machinery composed of four complexes ESCRT-0 to ESCRT-III regulates the biogenesis and trafficking of endosomes as well as the associated signaling and degradation pathways. Here, we investigate its role in regulating myogenesis. Results We uncovered a new function of the ESCRT-0 hepatocyte growth factor-regulated tyrosine kinase substrate Hrs/Hgs component in the regulation of myogenesis. Hrs depletion strongly impairs the differentiation of murine and human myoblasts. In the C2C12 murine myogenic cell line, inhibition of differentiation was attributed to impaired MRF in the early steps of differentiation. This alteration is associated with an upregulation of the MEK/ERK signaling pathway and a downregulation of the Akt2 signaling both leading to the inhibition of differentiation. The myogenic repressors FOXO1 as well as GSK3β were also found to be both activated when Hrs was absent. Inhibition of the MEK/ERK pathway or of GSK3β by the U0126 or azakenpaullone compounds respectively significantly restores the impaired differentiation observed in Hrs-depleted cells. In addition, functional autophagy that is required for myogenesis was also found to be strongly inhibited. Conclusions We show for the first time that Hrs/Hgs is a master regulator that modulates myogenesis at different levels through the control of trafficking, signaling, and degradation pathways. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01091-4.
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Affiliation(s)
- L Coudert
- Institut NeuroMyoGène, CNRS UMR5310, INSERM U1217, Faculté de Médecine Rockefeller, Université Claude Bernard Lyon, 8 avenue Rockefeller, 69373, 09, Lyon, Cedex, France
| | - A Osseni
- Institut NeuroMyoGène, CNRS UMR5310, INSERM U1217, Faculté de Médecine Rockefeller, Université Claude Bernard Lyon, 8 avenue Rockefeller, 69373, 09, Lyon, Cedex, France
| | - Y G Gangloff
- Institut NeuroMyoGène, CNRS UMR5310, INSERM U1217, Faculté de Médecine Rockefeller, Université Claude Bernard Lyon, 8 avenue Rockefeller, 69373, 09, Lyon, Cedex, France
| | - L Schaeffer
- Institut NeuroMyoGène, CNRS UMR5310, INSERM U1217, Faculté de Médecine Rockefeller, Université Claude Bernard Lyon, 8 avenue Rockefeller, 69373, 09, Lyon, Cedex, France
| | - P Leblanc
- Institut NeuroMyoGène, CNRS UMR5310, INSERM U1217, Faculté de Médecine Rockefeller, Université Claude Bernard Lyon, 8 avenue Rockefeller, 69373, 09, Lyon, Cedex, France.
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Myocyte enhancer factor 2A delays vascular endothelial cell senescence by activating the PI3K/p-Akt/SIRT1 pathway. Aging (Albany NY) 2020; 11:3768-3784. [PMID: 31182679 PMCID: PMC6594820 DOI: 10.18632/aging.102015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 05/31/2019] [Indexed: 01/04/2023]
Abstract
Myocyte enhancer factor 2A (MEF2A) dysfunction is closely related to the occurrence of senile diseases such as cardiocerebrovascular diseases, but the underlying molecular mechanism is unclear. Here, we studied the effects of MEF2A on the senescent phenotype of vascular endothelial cells (VEC) and downstream signaling pathway, and the association between plasma MEF2A levels and coronary artery disease (CAD). Results showed that MEF2A silencing promoted cell senescence and down-regulated PI3K/p-AKT/Sirtuin 1 (SIRT1) expression. MEF2A overexpression delayed cell senescence and up-regulated PI3K/p-AKT/SIRT1. Hydrogen peroxide (H2O2) treatment induced cellular senescence and down-regulated the expression of MEF2A and PI3K/p-AKT/SIRT1. MEF2A overexpression inhibited cellular senescence and the down-regulation of PI3K/p-AKT/SIRT1 induced by H2O2. Further study revealed that MEF2A directly up-regulated the expression of PIK3CA and PIK3CG through MEF2 binding sites in the promoter region. Pearson correlation and logistic regression analysis showed that the plasma level of MEF2A was negatively correlated with CAD, and with age in the controls. These results suggested that MEF2A can directly up-regulate PI3K gene expression, and one of the molecular mechanisms of delaying effect of MEF2A on VEC cell senescence was SIRT1-expression activation through the PI3K/p-Akt pathway. Moreover, the plasma MEF2A levels may be a potential biomarker for CAD risk prediction.
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MEF-2 isoforms' (A-D) roles in development and tumorigenesis. Oncotarget 2019; 10:2755-2787. [PMID: 31105874 PMCID: PMC6505634 DOI: 10.18632/oncotarget.26763] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 02/01/2019] [Indexed: 12/29/2022] Open
Abstract
Myocyte enhancer factor (MEF)-2 plays a critical role in proliferation, differentiation, and development of various cell types in a tissue specific manner. Four isoforms of MEF-2 (A-D) differentially participate in controlling the cell fate during the developmental phases of cardiac, muscle, vascular, immune and skeletal systems. Through their associations with various cellular factors MEF-2 isoforms can trigger alterations in complex protein networks and modulate various stages of cellular differentiation, proliferation, survival and apoptosis. The role of the MEF-2 family of transcription factors in the development has been investigated in various cell types, and the evolving alterations in this family of transcription factors have resulted in a diverse and wide spectrum of disease phenotypes, ranging from cancer to infection. This review provides a comprehensive account on MEF-2 isoforms (A-D) from their respective localization, signaling, role in development and tumorigenesis as well as their association with histone deacetylases (HDACs), which can be exploited for therapeutic intervention.
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Xiong Y, Wang L, Jiang W, Pang L, Liu W, Li A, Zhong Y, Ou W, Liu B, Liu SM. MEF2A alters the proliferation, inflammation-related gene expression profiles and its silencing induces cellular senescence in human coronary endothelial cells. BMC Mol Biol 2019; 20:8. [PMID: 30885136 PMCID: PMC6423757 DOI: 10.1186/s12867-019-0125-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 03/06/2019] [Indexed: 01/16/2023] Open
Abstract
Background Myocyte enhancer factor 2A (MEF2A) plays an important role in cell proliferation, differentiation and survival. Functional deletion or mutation in MEF2A predisposes individuals to cardiovascular disease mainly caused by vascular endothelial dysfunction. However, the effect of the inhibition of MEF2A expression on human coronary artery endothelial cells (HCAECs) is unclear. In this study, expression of MEF2A was inhibited by specific small interference RNA (siRNA), and changes in mRNA profiles in response to MEF2A knockdown were analyzed using an Agilent human mRNA array. Results Silencing of MEF2A in HCAECs accelerated cell senescence and suppressed cell proliferation. Microarray analysis identified 962 differentially expressed genes (DEGs) between the MEF2A knockdown group and the negative control group. Annotation clustering analysis showed that the DEGs were preferentially enriched in gene ontology (GO) terms and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways related to proliferation, development, survival, and inflammation. Furthermore, 61 of the 578 downregulated DEGs have at least one potential MEF2A binding site in the proximal promoter and were mostly enriched in the GO terms “reproduction” and “cardiovascular.” The protein–protein interaction network analyzed for the downregulated DEGs and the DEGs in the GO terms “cardiovascular” and “aging” revealed that PIK3CG, IL1B, IL8, and PRKCB were included in hot nodes, and the regulation of the longevity-associated gene PIK3CG by MEF2A has been verified at the protein level, suggesting that PIK3CG might play a key role in MEF2A knockdown induced HCAEC senescence. Conclusions MEF2A knockdown accelerates HCAEC senescence, and the underlying molecular mechanism may be involved in down-regulation of the genes related with cell proliferation, development, inflammation and survival, in which PIK3CG may play a key role. Electronic supplementary material The online version of this article (10.1186/s12867-019-0125-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yujuan Xiong
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, 111 Dade Road, Guangzhou, 510120, People's Republic of China
| | - Lin Wang
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China
| | - Wenyi Jiang
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China
| | - Lihua Pang
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China
| | - Weihua Liu
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China
| | - Aiqun Li
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China
| | - Yun Zhong
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China
| | - Wenchao Ou
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China
| | - Benrong Liu
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China.
| | - Shi-Ming Liu
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, No. 250 Changgang Dong Road, Guangzhou, 510260, Guangdong, People's Republic of China.
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Chen D, Li Z, Bao P, Chen M, Zhang M, Yan F, Xu Y, Ji C, Hu X, Sanchis D, Zhang Y, Ye J. Nrf2 deficiency aggravates Angiotensin II-induced cardiac injury by increasing hypertrophy and enhancing IL-6/STAT3-dependent inflammation. Biochim Biophys Acta Mol Basis Dis 2019; 1865:1253-1264. [PMID: 30668979 DOI: 10.1016/j.bbadis.2019.01.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 01/07/2019] [Accepted: 01/16/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND NF-E2-related factor 2 (Nrf2) is a transcription factor playing cytoprotective effects in various pathological processes including oxidative stress and cardiac hypertrophy. Despite being a potential therapeutic target to treat several cardiomyopathies, the signaling underlying Nrf2-dependent cardioprotective action remains largely uncharacterized. AIM This study aimed to explore the signaling mediating the role of Nrf2 in the development of hypertensive cardiac pathogenesis by analyzing the response to Angiotensin II (Ang II) in the presence or absence of Nrf2 expression, both in vivo and in vitro. RESULTS Our results indicated that Nrf2 deficiency exacerbated cardiac damage triggered by Ang II infusion. Mechanistically, our study shows that Ang II-triggered hypertrophy and inflammation is exacerbated in the absence of Nrf2 expression and points to the involvement of the IL-6/STAT3 signaling pathway in this event. Indeed, our results show that IL-6 abundance triggered by Ang II is increased in the absence of Nrf2 and demonstrate the requirement of IL-6 in STAT3 activation and cardiac inflammation induced by Ang II. CONCLUSION Our results show that Nrf2 is important for the protection of the heart against Ang II-induced cardiac hypertrophy and inflammation by mechanisms involving the regulation of IL-6/STAT3-dependent signaling.
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Affiliation(s)
- Dandan Chen
- State Key Laboratory of Natural Medicines, Department of Biochemistry, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Zhe Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China; Cardiovascular research Institute, Wuhan University, Wuhan 430060, China; Hubei key Laboratory of Cardiology, Wuhan 430060, China
| | - Peiqing Bao
- State Key Laboratory of Natural Medicines, Department of Biochemistry, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Miao Chen
- State Key Laboratory of Natural Medicines, Department of Biochemistry, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Miao Zhang
- State Key Laboratory of Natural Medicines, Department of Biochemistry, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Fangrong Yan
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing 210006, China
| | - Yitao Xu
- Division of Cancer, Department of Surgery and Cancer, Imperial College London, London W120NN, United Kingdom
| | - Caoyu Ji
- Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing 210006, China
| | - Xinyue Hu
- State Key Laboratory of Natural Medicines, Department of Biochemistry, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China
| | - Daniel Sanchis
- Institut de Recerca Biomedica de Lleida (IRBLLEIDA), Universitat de Lleida, Edifici Biomedicina-I. Av. Rovira Roure, 80, 25198 Lleida, Spain.
| | - Yubin Zhang
- State Key Laboratory of Natural Medicines, Department of Biochemistry, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China.
| | - Junmei Ye
- State Key Laboratory of Natural Medicines, Department of Biochemistry, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210006, China.
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Chen F, Chen D, Zhang Y, Jin L, Zhang H, Wan M, Pan T, Wang X, Su Y, Xu Y, Ye J. Interleukin-6 deficiency attenuates angiotensin II-induced cardiac pathogenesis with increased myocyte hypertrophy. Biochem Biophys Res Commun 2017; 494:534-541. [DOI: 10.1016/j.bbrc.2017.10.119] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 10/23/2017] [Indexed: 11/25/2022]
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