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Zhao Z, Cui X, Liao Z. Mechanism of fibroblast growth factor 21 in cardiac remodeling. Front Cardiovasc Med 2023; 10:1202730. [PMID: 37416922 PMCID: PMC10322220 DOI: 10.3389/fcvm.2023.1202730] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 06/07/2023] [Indexed: 07/08/2023] Open
Abstract
Cardiac remodeling is a basic pathological process that enables the progression of multiple cardiac diseases to heart failure. Fibroblast growth factor 21 is considered a regulator in maintaining energy homeostasis and shows a positive role in preventing damage caused by cardiac diseases. This review mainly summarizes the effects and related mechanisms of fibroblast growth factor 21 on pathological processes associated with cardiac remodeling, based on a variety of cells of myocardial tissue. The possibility of Fibroblast growth factor 21 as a promising treatment for the cardiac remodeling process will also be discussed.
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Affiliation(s)
- Zeyu Zhao
- Queen Mary College, Nanchang University, Nanchang, China
| | - Xuemei Cui
- Fourth Clinical Medical College, Nanchang University, Nanchang, China
| | - Zhangping Liao
- Jiangxi Provincial Key Laboratory of Basic Pharmacology School of Pharmaceutical Science, Nanchang University, Nanchang, China
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2
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Zhao Q, Zhang CL, Xiang RL, Wu LL, Li L. CTRP15 derived from cardiac myocytes attenuates TGFβ1-induced fibrotic response in cardiac fibroblasts. Cardiovasc Drugs Ther 2020; 34:591-604. [PMID: 32424654 DOI: 10.1007/s10557-020-06970-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE Cardiac fibrosis is characterized by net accumulation of extracellular matrix (ECM) components in the myocardium and facilitates the development of heart failure. C1q/tumor necrosis factor-related protein 15 (CTRP15) is a novel member of the CTRP family, and its gene expression is detected in adult mouse hearts. The present study was performed to determine the effect of CTRP15 on pressure overload-induced fibrotic remodeling. METHODS Mice were subjected to transverse aortic constriction (TAC) surgery, and adeno-associated virus serotype 9 (AAV9)-carrying mouse CTRP15 gene was injected into mice to achieve CTRP15 overexpression in the myocardium. Adenovirus carrying the gene encoding CTRP15 or small interfering RNA (siRNA) of interest was infected into cultured neonatal mouse ventricular cardiomyocytes (NMVCs) or cardiac fibroblasts (CFs). Gene expression was measured by quantitative real-time PCR, and protein expression and distribution were determined by Western blotting, immunocytochemistry, and immunofluorescence staining. RESULTS CTRP15 was predominantly produced by cardiac myocytes. CTRP15 expression in the left ventricles was downregulated in mice that underwent TAC. AAV9-mediated CTRP15 overexpression alleviated ventricular remodeling and dysfunction in the pressure-overloaded mice. Treatment of CFs with recombinant CTRP15 or the conditioned medium containing CTRP15 inhibited transforming growth factor (TGF)-β1-induced Smad3 activation and myofibroblast differentiation. CTRP15 increased phosphorylation of insulin receptor (IR), insulin receptor substrate-1 (IRS-1), and Akt. Blockade of IR/IRS-1/Akt pathway reversed the inhibitory effect of CTRP15 on TGF-β1-induced Smad3 activation. CONCLUSION CTRP15 exerts an anti-fibrotic effect on pressure overload-induced cardiac remodeling. The activation of IR/IRS-1/Akt pathway contributes to the anti-fibrotic effect of CTRP15 through targeting Smad3.
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Affiliation(s)
- Qian Zhao
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China
| | - Cheng-Lin Zhang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China
| | - Ruo-Lan Xiang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China
| | - Li-Ling Wu
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China
| | - Li Li
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
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3
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Lin J, Huang P, Chen W, Ye C, Su H, Yao X. Key Molecules and Pathways Underlying Sporadic Amyotrophic Lateral Sclerosis: Integrated Analysis on Gene Expression Profiles of Motor Neurons. Front Genet 2020; 11:578143. [PMID: 33240324 PMCID: PMC7680998 DOI: 10.3389/fgene.2020.578143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 10/05/2020] [Indexed: 01/02/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by progressive loss of motor neurons. The complex mechanisms underlying ALS are yet to be elucidated, while the lack of disease biomarkers and therapeutic options are associated with the poor prognosis of ALS patients. In this study, we performed bioinformatics analysis to clarify potential mechanisms in sporadic ALS (sALS). We compared three gene expression profiles (GSE18920, GSE56500, and GSE68605) of motor neurons obtained from sALS patients and healthy controls to discover differentially expressed genes (DEGs), and then performed integrated bioinformatics analyses to identify key molecules and pathways underlying sALS. We found that these DEGs were mainly enriched in the structure and functions of extracellular matrix (ECM), while functional enrichment in blood vessel morphogenesis was less correlated with motor neurons. The clustered subnetworks of the constructed protein-protein interaction network for DEGs and the group of selected hub genes were more significantly involved in the organization of collagen-containing ECM. The transcriptional factors database proposed RelA and NF-κB1 from NF-κB family as the key regulators of these hub genes. These results mainly demonstrated the alternations in ECM-related gene expression in motor neurons and suggested the role of NF-κB regulatory pathway in the pathogenesis of sALS.
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Affiliation(s)
- Jianing Lin
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
| | - Pian Huang
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
| | - Weineng Chen
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
| | - Chenghui Ye
- Department of Neurology, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Huanxing Su
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Xiaoli Yao
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
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4
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Ranjan P, Kumari R, Verma SK. Cardiac Fibroblasts and Cardiac Fibrosis: Precise Role of Exosomes. Front Cell Dev Biol 2019; 7:318. [PMID: 31867328 PMCID: PMC6904280 DOI: 10.3389/fcell.2019.00318] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 11/20/2019] [Indexed: 12/12/2022] Open
Abstract
Exosomes are a group of extracellular microvesicles that deliver biologically active RNAs, proteins, lipids and other signaling molecules to recipient cells. Classically, exosomes act as a vehicle by which cells or organs communicate with each other to maintain cellular/tissue homeostasis and to respond to pathological stress. Most multicellular systems, including the cardiovascular system, use exosomes for intercellular communication. In heart, endogenous exosomes from cardiac cells or stem cells aid in regulation of cell survival, cell proliferation and cell death; and thus tightly regulate cardiac biology and repair processes. Pathological stimulus in heart alters secretion and molecular composition of exosomes, thus influencing the above processes. The past decade has yielded increasing interest in the role of exosomes in the cardiovascular system and significant contribution of cardiac fibroblast (CF) and mediated cardiac fibrosis in heart failure, in this review we had overviewed the relevant literatures about fibroblast exosomes, its effect in the cardiovascular biology and its impact on cardiovascular disease (CVD). This review briefly describes the communication between fibroblasts and other cardiac cells via exosomes, the influence of such on myocardial fibrosis and remodeling, and the possibilities to use exosomes as biomarkers for acute and chronic heart diseases.
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Affiliation(s)
- Prabhat Ranjan
- Division of Cardiovascular Disease, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Rajesh Kumari
- Division of Cardiovascular Disease, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Suresh Kumar Verma
- Division of Cardiovascular Disease, The University of Alabama at Birmingham, Birmingham, AL, United States.,Department of Biomedical Engineering, The University of Alabama at Birmingham, Birmingham, AL, United States
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5
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Huang W, Huang C, Ding H, Luo J, Liu Y, Fan R, Xiao F, Fan X, Jiang Z. Involvement of miR-145 in the development of aortic dissection via inducing proliferation, migration, and apoptosis of vascular smooth muscle cells. J Clin Lab Anal 2019; 34:e23028. [PMID: 31489719 PMCID: PMC6977357 DOI: 10.1002/jcla.23028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 08/02/2019] [Accepted: 08/05/2019] [Indexed: 01/22/2023] Open
Abstract
Aim The current study aimed to examine miR‐145's contribution to thoracic aortic dissection (AD) development by modulating the biological functions of vascular smooth muscle cells (VSMCs). Methods The concentration of circulating miR‐145 was determined in patients with AD and healthy controls using quantitative polymerase chain reaction (qPCR). Aortic specimens were obtained from both individuals with Stanford type A AD undergoing surgical treatment and deceased organ donors (serving as controls) whose causes of death were nonvascular diseases. Then, qPCR and fluorescence in situ hybridization were applied to assess miR‐145 amounts and location, respectively. Furthermore, qPCR and immunoblot were employed to determine SMAD3 (the target gene of miR‐145, involved in the TGF‐β pathway) amounts at the gene and protein levels, respectively. Moreover, in vitro transfection of VSMCs with miR‐145 mimics or inhibitors was conducted. Finally, the 3‐(4,5‐Dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide (MTT) assay, Transwell assay and flow cytometry were employed for detecting VSMC proliferation, migration, and apoptosis, respectively. Results The amounts of miR‐145 in plasma and aortic specimens were markedly reduced in the AD group in comparison with control values (P < .05). miR‐145 was mostly located in VSMCs. Proliferation and apoptosis of VSMCs were significantly induced in vitro by the downregulation of miR‐145. Also, miR‐145 modulated SMAD3 expression. Conclusions miR‐145 was found to be downregulated in patients with AD, which induced the proliferation, migration, and apoptosis of VSMCs by targeting SMAD3. This suggested the involvement of miR‐145 in the pathogenesis of AD.
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Affiliation(s)
- Wenhui Huang
- Institute of Cardiovascular Disease and Key Lab for Arteriosclerology of Hunan Province, Hengyang Medical School, University of South China, Hengyang, China.,Department of Cardiology, Vascular Center, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Cheng Huang
- Department of Cardiology, Vascular Center, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Huanyu Ding
- Department of Cardiology, Vascular Center, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Jianfang Luo
- Department of Cardiology, Vascular Center, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yuan Liu
- Department of Cardiology, Vascular Center, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Ruixin Fan
- Department of Cardiovascular Surgery, Vascular Center, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Fei Xiao
- Department of Cardiovascular Surgery, Vascular Center, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Xiaoping Fan
- Department of Cardiovascular Surgery, Vascular Center, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zhisheng Jiang
- Institute of Cardiovascular Disease and Key Lab for Arteriosclerology of Hunan Province, Hengyang Medical School, University of South China, Hengyang, China
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Li S, Fang J, Chen L. Pyrrolidine Dithiocarbamate Attenuates Cardiocyte Apoptosis and Ameliorates Heart Failure Following Coronary Microembolization in Rats. Balkan Med J 2019; 36:245-250. [PMID: 31140237 PMCID: PMC6636647 DOI: 10.4274/balkanmedj.galenos.2019.2019.3.8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 05/28/2019] [Indexed: 12/01/2022] Open
Abstract
Background Nuclear factor-kB is highly activated in cardiovascular disorders. However, few articles have targeted at the role of nuclear factor-kB inhibitor in heart failure. Aims To evaluate the effects of nuclear factor-kB inhibitor pyrrolidine dithiocarbamate on cardiocyte apoptosis and cardiac function in a rat heart failure model. Study Design Animal experiment. Methods A stable and reproducible rat heart failure model (n=64) was prepared by injecting homologous microthrombotic particles into the left ventricle of Sprague–Dawley rats while obstructing the ascending aorta to produce coronary microembolization. Rats with heart failure were randomized into untreated (HFu) and pyrrolidine dithiocarbamate-treated (HFp) groups; the latter received an intraperitoneal injection of pyrrolidine dithiocarbamate (100 mg/kg/day) 1 h prior to surgery as well as on postoperative days 1-7. The sham group comprised 32 Sprague–Dawley rats. Eight rats from each group were sacrificed on days 1, 3, 7, and 14 postoperatively. Masson’s trichrome staining was used to determine the micro-fibrotic area to indicate the severity of myocardial loss. Terminal transferase uridine triphosphate nick end labeling staining was used to detect apoptotic cardiomyocytes. Echocardiography and hemodynamics were performed to evaluate left ventricular function. Results Rats with heart failure exhibited pathological changes evidenced by patchy myocardial fibrosis, remarkably elevated severity of myocardial loss, and persistently reduced left ventricular function. At the end of the study, compared with the HFu group, myocardial infarct size was reduced by 28% (p=0.001), cardiocyte apoptosis was suppressed (7.17%±1.47% vs 2.83%±0.75%, p<0.001), cardiac function parameters such as left ventricular ejection fraction (80%±4% vs 61%±6%), left ventricular + dP/dt max (4828±289 vs 2918±76 mmHg.s−1), left ventricular - dP/dt max (4398±269 vs 2481±365 mmHg.s−1), and left ventricular systolic pressure (126±13 vs 100±10 mmHg) were significantly increased, and left ventricular end-diastolic pressure was reduced (18±2 vs 13±1 mmHg) (p<0.001, for all) in the HFu group. Conclusion Our rat model can adequately mimic heart failure via coronary vessel embolization. Moreover, pyrrolidine dithiocarbamate treatment can reduce cardiocyte apoptosis and improve cardiac function, which may be beneficial for patients with heart failure secondary to myocardial infarction.
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Affiliation(s)
- Shumei Li
- Department of Cardiology, Union Hospital, Fujian Medical University, Fujian, China
| | - Jun Fang
- Department of Cardiology, Union Hospital, Fujian Medical University, Fujian, China
| | - Lianglong Chen
- Department of Cardiology, Union Hospital, Fujian Medical University, Fujian, China
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7
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Wang Y, Huang X, Ma Z, Wang Y, Chen X, Gao Y. Ophiopogonin D alleviates cardiac hypertrophy in rat by upregulating CYP2J3 in vitro and suppressing inflammation in vivo. Biochem Biophys Res Commun 2018; 503:1011-1019. [DOI: 10.1016/j.bbrc.2018.06.110] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 06/20/2018] [Indexed: 01/16/2023]
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8
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Gao H, Liu H, Tang T, Huang X, Wang D, Li Y, Huang P, Peng Y. Oleanonic acid ameliorates pressure overload-induced cardiac hypertrophy in rats: The role of PKCζ-NF-κB pathway. Mol Cell Endocrinol 2018; 470:259-268. [PMID: 29138023 DOI: 10.1016/j.mce.2017.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 10/15/2017] [Accepted: 11/09/2017] [Indexed: 10/18/2022]
Abstract
It has been reported that inflammation is closely related with cardiac hypertrophy. Some inflammatory cytokines such as tumor necrosis factor-α, interleukin-1β, and interleukin-6 directly induce cardiac hypertrophy, which is associated with the activation of nuclear factorkappa B (NF-κB). Thus, NF-κB is an attractive target for cardiac hypertrophy. In the present study, oleanonic acid inhibited the elevation of transcriptional activity of NF-κB and reduced the mRNA expressions of hypertrophic genes such as atrial natriuretic factor (ANF) and brain natriuretic peptide (BNP) in a concentration-dependent manner in phenylephrine (PE)-treated cardiomyocytes. Furthermore, we found that oleanonic acid inhibited the phosphorylation of protein kinase C ζ (PKCζ) at Thr410 site and then reduced the activation of NF-κB using gain- and loss-of-function approaches in PE-treated cardiomyocytes. In vivo, similar results were observed in abdominal aortic constriction (AAC) rats that were intragastrically administered with oleanonic acid, and the pathological changes accompanying cardiac hypertrophy were relieved. In conclusion, oleanonic acid can effectively ameliorate cardiac hypertrophy by inhibiting PKCζ-NF-κB signaling pathway.
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Affiliation(s)
- Hui Gao
- Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, Jishou University, Jishou, PR China; Key Laboratory of Plant Resource Conservation and Utilization, Jishou University, Jishou, PR China; Department of Pharmacology, School of Medicine, Jishou University, Jishou, PR China.
| | - Hui Liu
- Department of Pharmacy, Zhaoqing Medical College, Zhaoqing, PR China
| | - Tiexin Tang
- Department of Pharmacy, Zhaoqing Medical College, Zhaoqing, PR China
| | - Xiaofei Huang
- Department of Pharmacology, School of Medicine, Jishou University, Jishou, PR China
| | - Dongxiu Wang
- Department of Pharmacology, School of Medicine, Jishou University, Jishou, PR China
| | - Yan Li
- Department of Pharmacology, School of Medicine, Jishou University, Jishou, PR China
| | - Pan Huang
- Department of Pharmacology, School of Medicine, Jishou University, Jishou, PR China
| | - Yingfu Peng
- Department of Pharmacology, School of Medicine, Jishou University, Jishou, PR China.
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Abstract
Background Cardiac fibrosis occurs because of disruption of the extracellular matrix network leading to myocardial dysfunction. Angiotensin II has been implicated in the development of cardiac fibrosis. Recently, microRNAs have been identified as an attractive target for therapeutic intervention in cardiac pathologies; however, the underlying mechanism of microRNAs in cardiac fibrosis remains unclear. MicroRNA‐130a (miR‐130a) has been shown to participate in angiogenesis and cardiac arrhythmia; however, its role in cardiac fibrosis is unknown. Methods and Results In this study, we found that miR‐130a was significantly upregulated in angiotensin II‐infused mice. The in vivo inhibition of miR‐130a by locked nucleic acid– based anti‐miR‐130a in mice significantly reduced angiotensin II‐induced cardiac fibrosis. Upregulation of miR‐130a was confirmed in failing human hearts. Overexpressing miR‐130a in cardiac fibroblasts promoted profibrotic gene expression and myofibroblasts differentiation, and the inhibition of miR‐130a reversed the processes. Using the constitutive and dominant negative constructs of peroxisome proliferator‐activated receptor γ 3‐′untranslated region (UTR), data revealed that the protective mechanism was associated with restoration of peroxisome proliferator‐activated receptor γ level leading to the inhibition of angiotensin II‐induced cardiac fibrosis. Conclusions Our findings provide evidence that miR‐130a plays a critical role in cardiac fibrosis by directly targeting peroxisome proliferator‐activated receptor γ. We conclude that inhibition of miR‐130a would be a promising strategy for the treatment of cardiac fibrosis.
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Affiliation(s)
- Li Li
- Department of Medical Physiology, Texas A & M Health Science Center, Central Texas Veterans Health Care System, Temple, TX.,Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China
| | - Kelsey R Bounds
- Division of Nephrology and Hypertension, Department of Internal Medicine, Baylor Scott White Health, Temple, TX
| | - Piyali Chatterjee
- Division of Nephrology and Hypertension, Department of Internal Medicine, Baylor Scott White Health, Temple, TX
| | - Sudhiranjan Gupta
- Department of Medical Physiology, Texas A & M Health Science Center, Central Texas Veterans Health Care System, Temple, TX
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Kyhl K, Lønborg J, Hartmann B, Kissow H, Poulsen SS, Ali HE, Kjær A, Dela F, Engstrøm T, Treiman M. Lack of effect of prolonged treatment with liraglutide on cardiac remodeling in rats after acute myocardial infarction. Peptides 2017; 93:1-12. [PMID: 28460895 DOI: 10.1016/j.peptides.2017.04.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 03/28/2017] [Accepted: 04/27/2017] [Indexed: 02/06/2023]
Abstract
Following the acute phase of a myocardial infarction, a set of structural and functional changes evolves in the myocardium, collectively referred to as cardiac remodeling. This complex set of processes, including interstitial fibrosis, inflammation, myocyte hypertrophy and apoptosis may progress to heart failure. Analogs of the incretin hormone glucagon-like peptide 1 (GLP-1) have shown some promise as cardioprotective agents. We hypothesized that a long-acting GLP-1 analog liraglutide would ameliorate cardiac remodeling over the course of 4 weeks in a rat model of non-reperfused myocardial infarction. In 134 male Sprague Dawley rats myocardial infarctions were induced by ligation of the left anterior descending coronary artery. Rats were randomized to either subcutaneous injection of placebo or 0.3mg liraglutide once daily. Cardiac magnetic resonance imaging was performed after 4 weeks. Histology of the infarcted and remote non-infarcted myocardium, selected molecular remodeling markers and mitochondrial respiration in fibers of remote non-infarcted myocardium were analyzed. Left ventricular end diastolic volume increased in the infarcted hearts by 62% (from 0.58±0.03mL to 0.95±0.07mL, P<0.05) compared to sham operated hearts and left ventricle ejection fraction decreased by 37% (63±1%-40±3%, P<0.05). Increased interstitial fibrosis and phosphorylation of p38 Mitogen Activated Protein Kinase were observed in the non-infarct regions. Mitochondrial fatty acid oxidation was impaired. Liraglutide did not affect any of these alterations. Four-week treatment with liraglutide did not affect cardiac remodeling following a non-reperfused myocardial infarction, as assessed by cardiac magnetic resonance imaging, histological and molecular analysis and measurements of mitochondrial respiration.
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Affiliation(s)
- Kasper Kyhl
- Department of Cardiology, Rigshospitalet; University Hospital of Copenhagen, Denmark; Department of Biomedical Sciences and The Danish National Research Foundation Centre for Heart Arrhythmia, University of Copenhagen, Denmark.
| | - Jacob Lønborg
- Department of Cardiology, Rigshospitalet; University Hospital of Copenhagen, Denmark
| | - Bolette Hartmann
- Department of Biomedical Sciences and The Danish National Research Foundation Centre for Heart Arrhythmia, University of Copenhagen, Denmark; Department of Biomedical Sciences and Novo Nordisk Foundation Center of Basic Metabolic Research, University of Copenhagen, Denmark
| | - Hannelouise Kissow
- Department of Biomedical Sciences and The Danish National Research Foundation Centre for Heart Arrhythmia, University of Copenhagen, Denmark; Department of Biomedical Sciences and Novo Nordisk Foundation Center of Basic Metabolic Research, University of Copenhagen, Denmark
| | - Steen Seier Poulsen
- Department of Biomedical Sciences and The Danish National Research Foundation Centre for Heart Arrhythmia, University of Copenhagen, Denmark
| | - Henrik El Ali
- Department of Biomedical Sciences and The Danish National Research Foundation Centre for Heart Arrhythmia, University of Copenhagen, Denmark
| | - Andreas Kjær
- Department of Biomedical Sciences and The Danish National Research Foundation Centre for Heart Arrhythmia, University of Copenhagen, Denmark; Department of Clinical Physiology, Nuclear Medicine & PET and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Denmark
| | - Flemming Dela
- Department of Biomedical Sciences and The Danish National Research Foundation Centre for Heart Arrhythmia, University of Copenhagen, Denmark; Xlab, Center for Healthy Aging, Department of Biomedical Sciences, University of Copenhagen, Denmark
| | - Thomas Engstrøm
- Department of Cardiology, Rigshospitalet; University Hospital of Copenhagen, Denmark
| | - Marek Treiman
- Department of Biomedical Sciences and The Danish National Research Foundation Centre for Heart Arrhythmia, University of Copenhagen, Denmark
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11
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Wei Q, Bian Y, Yu F, Zhang Q, Zhang G, Li Y, Song S, Ren X, Tong J. Chronic intermittent hypoxia induces cardiac inflammation and dysfunction in a rat obstructive sleep apnea model. J Biomed Res 2016; 30:490-495. [PMID: 27924067 PMCID: PMC5138581 DOI: 10.7555/jbr.30.20160110] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 09/26/2016] [Accepted: 10/26/2016] [Indexed: 11/03/2022] Open
Abstract
Chronic intermittent hypoxia is considered to play an important role in cardiovascular pathogenesis during the development of obstructive sleep apnea (OSA). We used a well-described OSA rat model induced with simultaneous intermittent hypoxia. Male Sprague Dawley rats were individually placed into plexiglass chambers with air pressure and components were electronically controlled. The rats were exposed to intermittent hypoxia 8 hours daily for 5 weeks. The changes of cardiac structure and function were examined by ultrasound. The cardiac pathology, apoptosis, and fibrosis were analyzed by H&E staining, TUNNEL assay, and picosirius staining, respectively. The expression of inflammation and fibrosis marker genes was analyzed by quantitative real-time PCR and Western blot. Chronic intermittent hypoxia/low pressure resulted in significant increase of left ventricular internal diameters (LVIDs), end-systolic volume (ESV), end-diastolic volume (EDV), and blood lactate level and marked reduction in ejection fraction and fractional shortening. Chronic intermittent hypoxia increased TUNNEL-positive myocytes, disrupted normal arrangement of cardiac fibers, and increased Sirius stained collagen fibers. The expression levels of hypoxia induced factor (HIF)-1α, NF-kB, IL-6, and matrix metallopeptidase 2 (MMP-2) were significantly increased in the heart of rats exposed to chronic intermittent hypoxia. In conclusion, the left ventricular function was adversely affected by chronic intermittent hypoxia, which is associated with increased expression of HIF-1α and NF-kB signaling molecules and development of cardiac inflammation, apoptosis and fibrosis.
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Affiliation(s)
- Qin Wei
- Cardiovascular Institute, Southeast University, Nanjing, Jiangsu 210009, China.,Department of Cardiology, Zhongda Hospital Affiliated to Southeast University, Nanjing, Jiangsu 210009, China
| | - Yeping Bian
- Department of Intensive Care Unit, Jiangsu Province Official Hospital, Nanjing, Jiangsu 210009, China
| | - Fuchao Yu
- Cardiovascular Institute, Southeast University, Nanjing, Jiangsu 210009, China
| | - Qiang Zhang
- Department of Cardiology, Zhongda Hospital Affiliated to Southeast University, Nanjing, Jiangsu 210009, China
| | - Guanghao Zhang
- Cardiovascular Institute, Southeast University, Nanjing, Jiangsu 210009, China
| | - Yang Li
- Cardiovascular Institute, Southeast University, Nanjing, Jiangsu 210009, China.,Department of Cardiology, Zhongda Hospital Affiliated to Southeast University, Nanjing, Jiangsu 210009, China
| | - Songsong Song
- Cardiovascular Institute, Southeast University, Nanjing, Jiangsu 210009, China
| | - Xiaomei Ren
- Department of Geriatrics, Zhongda Hospital Affiliated to Southeast University, Nanjing, Jiangsu 210009, China
| | - Jiayi Tong
- Cardiovascular Institute, Southeast University, Nanjing, Jiangsu 210009, China.,Department of Cardiology, Zhongda Hospital Affiliated to Southeast University, Nanjing, Jiangsu 210009, China;
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12
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Therapeutic Manipulation of Ageing: Repurposing Old Dogs and Discovering New Tricks. EBioMedicine 2016; 14:24-31. [PMID: 27889480 PMCID: PMC5161440 DOI: 10.1016/j.ebiom.2016.11.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 11/14/2016] [Accepted: 11/14/2016] [Indexed: 01/04/2023] Open
Abstract
Ageing is a leading risk factor for many debilitating diseases. While age-related diseases have been the subject of over a century of intense investigation, until recently, physiological ageing was considered unavoidable. Pharmacological and genetic studies have since shown that ageing is a malleable process and that its abrogation can prevent its associated diseases. This review summarises a sample of the most promising efforts to deliver the products of ageing research to the clinic. Current efforts include the use of clinically approved drugs that have since been repurposed, as well as the development of novel therapeutics, to target ageing. Furthermore, ongoing research has sought reliable biomarkers of ageing that will accelerate the development of such therapeutics. Development of these technologies will improve quality of late-life and help relieve the enormous stress placed on state healthcare systems by a rapidly ageing global population. Thus, for both medical and socioeconomic reasons, it is imperative that ageing is made to yield to intervention.
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Joshi SK, Lee L, Lovett DH, Kang H, Kim HT, Delgado C, Liu X. Novel intracellular N-terminal truncated matrix metalloproteinase-2 isoform in skeletal muscle ischemia-reperfusion injury. J Orthop Res 2016. [PMID: 26213293 DOI: 10.1002/jor.22992] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Ischemia-reperfusion injury (IRI) occurs when blood returns to tissues following a period of ischemia. Reintroduction of blood flow results in the production of free radicals and reactive oxygen species that damage cells. Skeletal muscle IRI is commonly seen in orthopedic trauma patients. Experimental studies in other organ systems have elucidated the importance of extracellular and intracellular matrix metalloproteinase-2 (MMP-2) isoforms in regulating tissue damage in the setting of oxidant stress resulting from IRI. Although the extracellular full-length isoform of MMP-2 (FL-MMP-2) has been previously studied in the setting of skeletal muscle IRI, studies investigating the role of the N-terminal truncated isoform (NTT-MMP-2) in this setting are lacking. In this study, we first demonstrated significant increases in FL- and NTT-MMP-2 gene expression in C2C12 myoblast cells responding to re-oxygenation following hypoxia in vitro. We then evaluated the expression of FL- and NTT-MMP-2 in modulating skeletal muscle IRI using a previously validated murine model. NTT-MMP-2, but not FL-MMP-2 expression was significantly increased in skeletal muscle following IRI. Moreover, the expression of toll-like receptors (TLRs) -2 and -4, IL-6, OAS-1A, and CXCL1 was also significantly up-regulated following IRI. Treatment with the potent anti-oxidant pyrrolidine dithiocarbamate (PDTC) significantly suppressed NTT-MMP-2, but not FL-MMP-2 expression and improved muscle viability following IRI. This data suggests that NTT-MMP-2, but not FL-MMP-2, is the major isoform of MMP-2 involved in skeletal muscle IRI.
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Affiliation(s)
- Sunil K Joshi
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California.,Department of Medicine, University of California, San Francisco, California
| | - Lawrence Lee
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California
| | - David H Lovett
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California.,Department of Medicine, University of California, San Francisco, California
| | - Heejae Kang
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California
| | - Hubert T Kim
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California.,Department of Orthopaedic Surgery, University of California, San Francisco, California
| | - Cynthia Delgado
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California.,Department of Medicine, University of California, San Francisco, California
| | - Xuhui Liu
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California.,Department of Orthopaedic Surgery, University of California, San Francisco, California
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Liu H, Wang ZC, Bai YG, Cai Y, Yu JW, Zhang HJ, Bao JX, Ren XL, Xie MJ, Ma J. Simulated microgravity promotes monocyte adhesion to rat aortic endothelium via nuclear factor-κB activation. Clin Exp Pharmacol Physiol 2016; 42:510-9. [PMID: 25740656 DOI: 10.1111/1440-1681.12381] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 02/21/2015] [Accepted: 02/23/2015] [Indexed: 11/28/2022]
Abstract
Microgravity-induced vascular remodelling may play an important role in post-spaceflight orthostatic intolerance. In this study, we aimed to investigate the effects of simulated microgravity on monocyte adhesion to aortic endothelium in hindlimb unweighted rats and to elucidate the underlying mechanisms associated with this event. Sprague-Dawley rats were subjected to 4-week hindlimb unweighting to simulate microgravity. The recruitment of monocytes to the abdominal aorta was investigated by en face immunofluorescence staining and monocyte binding assays. The expression of the adhesion molecules E-selectin and vascular cell adhesion molecule-1 as well as the cytokine monocyte chemoattractant protein (MCP)-1 was evaluated by immunohistochemical staining, western blot, and quantitative reverse transcription polymerase chain reaction analyses. Additionally, nuclear factor-κB (NF-κB) activation and the messenger RNA expression levels of E-selectin, vascular cell adhesion molecule-1, and MCP-1 were assessed with the administration of an NF-κB inhibitor, pyrrolidine dithiocarbamate. Results showed that simulated microgravity significantly increased monocyte recruitment to the aortic endothelium, protein expression of E-selectin and MCP-1, and NF-κB activation in the abdominal aorta of rats. Pyrrolidine dithiocarbamate treatment not only significantly inhibited NF-κB activity but also reduced the messenger RNA levels of E-selectin, vascular cell adhesion molecule-1, and MCP-1 as well as monocyte recruitment in the abdominal aorta of hindlimb unweighted rats. These results suggest that simulated microgravity increases monocyte adhesion to rat aortic endothelium via the NF-κB-mediated expression of the adhesion molecule E-selectin and the cytokine MCP-1. Therefore, an NF-κB-mediated inflammatory response may be one of the cellular mechanisms responsible for arterial remodelling during exposure to microgravity.
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Affiliation(s)
- Huan Liu
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
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Effects of angiotensin-(1-7) on the proliferation and collagen synthesis of arginine vasopressin-stimulated rat cardiac fibroblasts: role of mas receptor-calcineurin-NF-κB signaling pathway. J Cardiovasc Pharmacol 2015; 64:536-42. [PMID: 25490420 DOI: 10.1097/fjc.0000000000000151] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
: Interstitial fibrosis is a common pathological change in various heart diseases, especially cardiac hypertrophy. Arginine vasopressin (AVP), one of the hallmarks of heart failure, exhibits a profibrotic effect by promoting the proliferation and differentiation of cardiac fibroblasts (CFs). In contrast, angiotensin-(1-7) [Ang-(1-7)] was reported to be beneficial for cardiac remodeling by its antifibrotic effect. To evaluate the effect of Ang-(1-7) on AVP-stimulated CFs and the subsequent signaling molecules involved, CFs isolated from neonatal rat hearts were incubated with AVP and treated with or without Ang-(1-7). Cell proliferation, cell cycle, collagen production, and related cellular signaling molecules were then assessed. The results showed that Ang-(1-7) dose-dependently inhibited cell proliferation and collagen production in AVP-stimulated CFs. In addition, Ang-(1-7) also significantly suppressed calcineurin activity in a dose-dependent manner in AVP-stimulated CFs, which was associated with reduced collagen production. Accordingly, the nuclear translocation and transcriptional activity of nuclear factor-kappa B (NF-κB), downstream signal of calcineurin, were also notably restrained by Ang-(1-7) in AVP-stimulated CFs. Furthermore, the inhibitory effect of Ang-(1-7) on AVP-activated calcineurin-NF-κB signaling was completely reversed by the Mas receptor antagonist A-799. These findings suggest that Ang-(1-7) exerts an antifibrotic effect by inhibiting AVP-stimulated CF proliferation and collagen synthesis by inactivating Mas receptor-calcineurin-NF-κB signaling pathway.
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Cau SBA, Guimaraes DA, Rizzi E, Ceron CS, Gerlach RF, Tanus-Santos JE. The Nuclear Factor kappaB Inhibitor Pyrrolidine Dithiocarbamate Prevents Cardiac Remodelling and Matrix Metalloproteinase-2 Up-Regulation in Renovascular Hypertension. Basic Clin Pharmacol Toxicol 2015; 117:234-41. [PMID: 25816715 DOI: 10.1111/bcpt.12400] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 03/19/2015] [Indexed: 12/15/2022]
Abstract
Imbalanced matrix metalloproteinase (MMP) activity is involved in hypertensive cardiac hypertrophy. Pharmacological inhibition of nuclear factor kappaB (NF-кB) with pyrrolidine dithiocarbamate (PDTC) can prevent MMP up-regulation. We suggested that treatment with PDTC could prevent 2-kidney, 1-clip (2K1C) hypertension-induced left ventricular remodelling. Sham-operated controls or 2K1C rats with hypertension received either vehicle or PDTC (100 mg/kg/day) by gavage for 8 weeks. Systolic blood pressure was monitored every week. Histological assessment of left ventricles was carried out with haematoxylin/eosin sections, and fibrosis was quantified in picrosirius red-stained sections. Oxidative stress was evaluated in heart samples with the dihydroethidium probe. Cardiac MMP activity was determined by in situ zymography, and cardiac MMP-2 was assessed by immunofluorescence. 2K1C surgery significantly increased systolic blood pressure in the 2K1C vehicle. PDTC exerted antihypertensive effects after 2 weeks of treatment. Histology revealed increased left ventricular and septum wall thickness associated with augmented myocyte diameter in hypertensive rats, which were reversed by treatment with PDTC. Hypertensive rats developed pronounced cardiac fibrosis with increased interstitial collagen area, increased cardiac reactive oxygen species levels, gelatinase activity and MMP-2 expression. PDTC treatment decreased these alterations. These findings show that PDTC modulates myocardial MMP-2 expression and ameliorates cardiac remodelling in renovascular hypertension. These results suggest that interfering with MMP expression at transcriptional level may be an interesting strategy in the therapy of organ damage associated with hypertension.
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Affiliation(s)
- Stefany B A Cau
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Danielle A Guimaraes
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Elen Rizzi
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Carla S Ceron
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Raquel F Gerlach
- Department of Morphology, Estomatology and Physiology, Dental School of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Jose E Tanus-Santos
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
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Recombinant adeno-associated virus serotype 9 with p65 ribozyme protects H9c2 cells from oxidative stress through inhibiting NF-κB signaling pathway. JOURNAL OF GERIATRIC CARDIOLOGY : JGC 2015; 11:311-5. [PMID: 25593580 PMCID: PMC4294148 DOI: 10.11909/j.issn.1671-5411.2014.04.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 09/29/2014] [Accepted: 10/16/2014] [Indexed: 12/25/2022]
Abstract
Background Oxidative stress is a major mechanism underlying the pathogenesis of cardiovascular disease. It can trigger inflammatory cascades which are primarily mediated via nuclear factor-κB (NF-κB). The NF-κB transcription factor family includes several subunits (p50, p52, p65, c-Rel, and Rel B) that respond to myocardial ischemia. It has been proved that persistent myocyte NF-κB p65 activation in heart failure exacerbates cardiac remodeling. Mechods A recombinant adeno-associated virus serotype 9 carrying enhanced green fluorescent protein and anti-NF-κB p65 ribozyme (AAV9-R65-CMV-eGFP) was constructed. The cells were assessed by MTT assay, Annexin V–propidium iodide dual staining to study apoptosis. The expression of P65 and P50 were assessed by Western blot to investigate the underlying molecular mechanisms. Results After stimulation with H2O2 for 6 h, H9c2 cells viability decreased significantly, a large fraction of cells underwent apoptosis. We observed a rescue of H9c2 cells from H2O2-induced apoptosis in pretreatment with AAV9-R65-CMV-eGFP. Moreover, AAV9-R65-CMV-eGFP decreased H2O2-induced P65 expression. Conclusions AAV9-R65-CMV-eGFP protects H9c2 cells from oxidative stress induced apoptosis through down-regulation of P65 expression. These observations indicate that AAV9-R65-CMV-eGFP has the potential to exert cardioprotective effects against oxidative stress, which might be of great importance to clinical efficacy for cardiovascular disease.
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Zheng L, Han P, Liu J, Li R, Yin W, Wang T, Zhang W, Kang YJ. Role of copper in regression of cardiac hypertrophy. Pharmacol Ther 2014; 148:66-84. [PMID: 25476109 DOI: 10.1016/j.pharmthera.2014.11.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 11/17/2014] [Indexed: 02/07/2023]
Abstract
Pressure overload causes an accumulation of homocysteine in the heart, which is accompanied by copper depletion through the formation of copper-homocysteine complexes and the excretion of the complexes. Copper supplementation recovers cytochrome c oxidase (CCO) activity and promotes myocardial angiogenesis, along with the regression of cardiac hypertrophy and the recovery of cardiac contractile function. Increased copper availability is responsible for the recovery of CCO activity. Copper promoted expression of angiogenesis factors including vascular endothelial growth factor (VEGF) in endothelial cells is responsible for angiogenesis. VEGF receptor-2 (VEGFR-2) is critical for hypertrophic growth of cardiomyocytes and VEGFR-1 is essential for the regression of cardiomyocyte hypertrophy. Copper, through promoting VEGF production and suppressing VEGFR-2, switches the VEGF signaling pathway from VEGFR-2-dependent to VEGFR-1-dependent, leading to the regression of cardiomyocyte hypertrophy. Copper is also required for hypoxia-inducible factor-1 (HIF-1) transcriptional activity, acting on the interaction between HIF-1 and the hypoxia responsible element and the formation of HIF-1 transcriptional complex by inhibiting the factor inhibiting HIF-1. Therefore, therapeutic targets for copper supplementation-induced regression of cardiac hypertrophy include: (1) the recovery of copper availability for CCO and other critical cellular events; (2) the activation of HIF-1 transcriptional complex leading to the promotion of angiogenesis in the endothelial cells by VEGF and other factors; (3) the activation of VEGFR-1-dependent regression signaling pathway in the cardiomyocytes; and (4) the inhibition of VEGFR-2 through post-translational regulation in the hypertrophic cardiomyocytes. Future studies should focus on target-specific delivery of copper for the development of clinical application.
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Affiliation(s)
- Lily Zheng
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Pengfei Han
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Jiaming Liu
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Rui Li
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Wen Yin
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Tao Wang
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Wenjing Zhang
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Y James Kang
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40292, USA.
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Icli B, Dorbala P, Feinberg MW. An emerging role for the miR-26 family in cardiovascular disease. Trends Cardiovasc Med 2014; 24:241-8. [PMID: 25066487 DOI: 10.1016/j.tcm.2014.06.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 06/06/2014] [Accepted: 06/06/2014] [Indexed: 12/26/2022]
Abstract
In response to acute myocardial infarction (MI), a complex series of cellular and molecular signaling events orchestrate the myocardial remodeling that ensues weeks to months after injury. Clinical, epidemiological, and pathological studies demonstrate that inadequate or impaired angiogenesis after myocardial injury is often associated with decreased left ventricular (LV) function and clinical outcomes. The microRNA family, miR-26, plays diverse roles in regulating key aspects of cellular growth, development, and activation. Recent evidence supports a central role for the miR-26 family in cardiovascular disease by controlling critical signaling pathways, such as BMP/SMAD1 signaling, and targets relevant to endothelial cell growth, angiogenesis, and LV function post-MI. Emerging studies of the miR-26 family in other cell types including vascular smooth muscle cells, cardiac fibroblasts, and cardiomyocytes suggest that miR-26 may bear important implications for a range of cardiovascular repair mechanisms. This review examines the current knowledge of the miR-26 family's role in key cell types that critically control cardiovascular disease under pathological and physiological stimuli.
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Affiliation(s)
- Basak Icli
- Department of Medicine, Cardiovascular Division, Brigham and Women׳s Hospital, Harvard Medical School, Boston, MA
| | - Pranav Dorbala
- Department of Medicine, Cardiovascular Division, Brigham and Women׳s Hospital, Harvard Medical School, Boston, MA
| | - Mark W Feinberg
- Department of Medicine, Cardiovascular Division, Brigham and Women׳s Hospital, Harvard Medical School, Boston, MA.
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Thakur S, Li L, Gupta S. NF-κB-mediated integrin-linked kinase regulation in angiotensin II-induced pro-fibrotic process in cardiac fibroblasts. Life Sci 2014; 107:68-75. [PMID: 24802124 DOI: 10.1016/j.lfs.2014.04.030] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 04/24/2014] [Accepted: 04/25/2014] [Indexed: 12/22/2022]
Abstract
AIMS Cardiac fibrosis is a final outcome of many clinical conditions that lead to cardiac failure and is characterized by a progressive substitution of cellular elements by extracellular-matrix proteins, such as collagen type I, collagen type II, connective tissue growth factor (CTGF), etc. The aim of this study was to identify the mechanisms responsible for angiotensin II (Ang II)-stimulated cardiac fibrosis using rat neonatal cardiac fibroblasts. MAIN METHODS Neonatal fibroblasts were transfected with IκBα mutant, constitutively active (ca) integrin-linked kinase (ILK), dominant negative of ILK and small interfering RNA (siRNA) of ILK in the presence and absence of Ang-II stimulation. The pro-fibrotic gene expression and protein levels were determined by quantitative real time PCR and western blotting using their specific probes and antibodies. NF-κB translocation was determined by immunocytochemistry and confocal microscopy images were analyzed. KEY FINDINGS Our results indicate that overexpression of ILK promotes a pro-fibrotic process by upregulating collagen type I and CTGF genes via activation of nuclear factor-κB (NF-κB) in cardiac fibroblasts. Inactivation of either NF-κB by the super-repressor IκBα or ILK by siRNA significantly attenuates the pro-fibrotic process. Moreover, ILK overexpression triggers NF-κB-p65 translocation to the nucleus, and ILK inhibition prevents the translocation in cardiac fibroblasts stimulated with Ang II. SIGNIFICANCE Our data suggest that the Ang II-stimulated pro-fibrotic process is regulated by a complex mechanism involving crosstalk between ILK and NF-κB activation. This dual mechanism may play a critical role in the progression of cardiac fibrosis.
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Affiliation(s)
- Suresh Thakur
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A & M Health Science Center; Scott & White; Central Texas Veterans Health Care System, Temple, TX, USA
| | - Li Li
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A & M Health Science Center; Scott & White; Central Texas Veterans Health Care System, Temple, TX, USA
| | - Sudhiranjan Gupta
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A & M Health Science Center; Scott & White; Central Texas Veterans Health Care System, Temple, TX, USA.
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Tapia-Castillo A, Carvajal CA, Campino C, Vecchiola A, Allende F, Solari S, García L, Lavanderos S, Valdivia C, Fuentes C, Lagos CF, Martínez-Aguayo A, Baudrand R, Aglony M, García H, Fardella CE. Polymorphisms in the RAC1 gene are associated with hypertension risk factors in a Chilean pediatric population. Am J Hypertens 2014; 27:299-307. [PMID: 24487980 DOI: 10.1093/ajh/hpt277] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND The GTPase Rac1 has been implicated in hypertension as a modulator of mineralocorticoid receptor activity. Our aim is to investigate the frequency of polymorphisms rs10951982 (intron 1, G>A) and rs836478 (intron 3, T>C) in the RAC1 gene and perform association studies with clinical and biochemical parameters in a Chilean pediatric cohort. METHODS Two hundred two normotensive (NT) subjects (aged 4-16 years) were divided into 2 groups: NT subjects with hypertensive parents (NH; n = 103) and NT subjects with NT parents (NN; n = 99). We measured markers of inflammation (high-sensitivity C-reactive protein, interleukin 6 (IL-6), interleukin 8, and tumor necrosis factor α), endothelial damage (Plasminogen activator inhibitor-1 metalloproteinase-9, and metalloproteinase-2), and oxidative stress (malondialdehyde). Data were expressed as median and interquartile range (IQR). RESULTS We found differences in polymorphism rs836478 (intron 3, C>T) in both genotypic (χ(2) = 15.2, 2 df; P = 0.0005) and allelic (X(2)=5.5, 1 df; P = 0.01) frequencies in NH vs. NN subjects. NH subjects with a TT genotype showed increase MMP9 expression (median = 2.3, IQR - 1.6-3.2; vs. median = 1.6, IQR = 1.6-2.3 AU; P = 0.01) and lower IL-6 expression (median = 8.8, IQR = 7.0-11.8; vs. median = 12.1, IQR = 8.2-14.7 pg/ml; P = 0.02) compared with subjects with TC/CC genotype. No difference in the allelic frequency distribution was seen in the polymorphism rs10951982 (NH vs. NN: χ(2)=0.2, 1 df; P = 0.6). For this SNP, NN subjects with GA/AA genotype showed decreased diastolic BP indexes compared with subjects with native GG genotype (median = 1.08, IQR = 1.0-1.2; vs. median = 0.99, IQR = 0.94-1.1; P = 0.02). CONCLUSIONS We report the frequency of polymorphisms rs836478 and rs10951982 of the RAC1 gene in a Spanish-Amerindian cohort. The polymorphism rs836478 was associated with an increased expression in markers of inflammation and endothelial damage (MMP9 and IL-6) in pediatric subjects with a hypertensive genetic background.
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Affiliation(s)
- Alejandra Tapia-Castillo
- Department of Endocrinology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
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Wei Y, Du W, Xiong X, He X, Ping Yi, Deng Y, Chen D, Li X. Prenatal exposure to lipopolysaccharide results in myocardial remodelling in adult murine offspring. JOURNAL OF INFLAMMATION-LONDON 2013; 10:35. [PMID: 24764457 PMCID: PMC3874617 DOI: 10.1186/1476-9255-10-35] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Accepted: 11/14/2013] [Indexed: 11/10/2022]
Abstract
BACKGROUND The epigenetic plasticity hypothesis indicates that pregnancy exposure may result in adult-onset diseases, including hypertension, diabetes and cardiovascular disease, in offspring. In a previous study, we discovered that prenatal exposure to inflammatory stimulants, such as lipopolysaccharides (LPS), could lead to hypertension in adult rat offspring. In the present study, we further demonstrate that maternal inflammation induces cardiac hypertrophy and dysfunction via ectopic over-expression of nuclear transcription factor κB (NF- κB), and pyrrolidine dithiocarbamate (PDTC) can protect cardiac function by reducing maternal inflammation. METHODS Pregnant SD rats were randomly divided into three groups and intraperitoneally injected with a vehicle, LPS (0.79 mg/kg), or LPS (0.79 mg/kg) plus PDTC (100 mg/kg) at 8 to 12 days of gestation. The offspring were raised until 4 and 8 months old, at which point an echocardiographic study was performed. The left ventricular (LV) mass index and apoptosis were examined. RESULTS At 4 months of age, the LPS offspring exhibited augmented posterior wall thickness. These rats displayed left ventricle (LV) hypertrophy and LV diastolic dysfunction as well as a higher apoptotic index, a higher level of Bax and a lower level of Bcl-2 at 8 months of age. The protein levels of NF-κB (p65) in the myocardium of the offspring were measured at this time. NF-κB protein levels were higher in the myocardium of LPS offspring. The offspring that were prenatally treated with PDTC displayed improved signs of blood pressure (BP) and LV hypertrophy. CONCLUSIONS Maternal inflammation can induce cardiac hypertrophy in offspring during aging accompanied with hypertension emergence and can be rescued by the maternal administration of PDTC (the inhibitor of NF-κB).
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Affiliation(s)
- Yanling Wei
- The Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, The Third Military Medical University, Chongqing, China ; Department of Gastroenterology, Research Institute of Surgery, Da ping Hospital, The Third Military Medical University, Chongqing, China
| | - Wenhua Du
- Department of Ultrasound, Research Institute of Surgery, Da ping Hospital, The Third Military Medical University, Chongqing, China
| | - Xiuqin Xiong
- Department of Ultrasound, Research Institute of Surgery, Da ping Hospital, The Third Military Medical University, Chongqing, China
| | - Xiaoyan He
- The Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, The Third Military Medical University, Chongqing, China
| | - Ping Yi
- Department of Gynaecology, Research Institute of Surgery, Da ping Hospital, The Third Military Medical University, Chongqing, China
| | - Youcai Deng
- The Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, The Third Military Medical University, Chongqing, China
| | - Dongfeng Chen
- Department of Gastroenterology, Research Institute of Surgery, Da ping Hospital, The Third Military Medical University, Chongqing, China
| | - Xiaohui Li
- The Institute of Materia Medica and Department of Pharmaceutics, College of Pharmacy, The Third Military Medical University, Chongqing, China
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Wei C, Kim IK, Kumar S, Jayasinghe S, Hong N, Castoldi G, Catalucci D, Jones WK, Gupta S. NF-κB mediated miR-26a regulation in cardiac fibrosis. J Cell Physiol 2013; 228:1433-42. [PMID: 23254997 DOI: 10.1002/jcp.24296] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 11/27/2012] [Indexed: 02/03/2023]
Abstract
Micro-RNAs (miRNAs) are a class of small non-coding RNAs, recently emerged as a post-transcriptional regulator having a key role in various cardiac pathologies. Among them, cardiac fibrosis that occurs as a result from an imbalance of extracellular matrix proteins turnover and is a highly debilitating process that eventually lead to organ dysfunction. An emerging theme on is that miRNAs participate in feedback loop with transcription factors that regulate their transcription. NF-κB, a key transcription factor regulator controls a series of gene program in various cardiac diseases through positive and negative feedback mechanism. But, NF-κB mediated miRNA regulation in cardiac fibrosis remains obscure. Bioinformatics analysis revealed that miR-26a has targets collagen I and CTGF and possesses putative NF-κB binding element in its promoter region. Here, we show that inhibition of NF-κB in cardiac fibroblast restores miR-26a expression, attenuating collagen I, and CTGF gene expression in the presence of Ang II, conferring a feedback regulatory mechanism in cardiac fibrosis. The target genes for miR-26a were confirmed using 3'-UTR luciferase reporter assays for collagen I and CTGF genes. Using NF-κB reporter assays, we determine that miR-26a overexpression inhibits NF-κB activity. Finally, we show that miR-26a expression is restored along with the attenuation of collagen I and CTGF genes in cardiac specific IkBa triple mutant transgenic mice (preventing NF-κB activation) subjected to 4 weeks transverse aortic banding (TAC), compared to wild type (WT) mice. The data indicate a potential role of miR-26a in cardiac fibrosis and, offer novel therapeutic intervention.
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Affiliation(s)
- Chuanyu Wei
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A & M Health Science Center, Scott & White, Central Texas Veterans Health Care System, Temple, Texas 76504, USA
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Lin CY, Huang CC, Wang WD, Hsiao CD, Cheng CF, Wu YT, Lu YF, Hwang SPL. Low temperature mitigates cardia bifida in zebrafish embryos. PLoS One 2013; 8:e69788. [PMID: 23922799 PMCID: PMC3724881 DOI: 10.1371/journal.pone.0069788] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 06/12/2013] [Indexed: 11/18/2022] Open
Abstract
The coordinated migration of bilateral cardiomyocytes and the formation of the cardiac cone are essential for heart tube formation. We investigated gene regulatory mechanisms involved in myocardial migration, and regulation of the timing of cardiac cone formation in zebrafish embryos. Through screening of zebrafish treated with ethylnitrosourea, we isolated a mutant with a hypomorphic allele of mil (s1pr2)/edg5, called s1pr2as10 (as10). Mutant embryos with this allele expressed less mil/edg5 mRNA and exhibited cardia bifida prior to 28 hours post-fertilization. Although the bilateral hearts of the mutants gradually fused together, the resulting formation of two atria and one tightly-packed ventricle failed to support normal blood circulation. Interestingly, cardia bifida of s1pr2as10 embryos could be rescued and normal circulation could be restored by incubating the embryos at low temperature (22.5°C). Rescue was also observed in gata5 and bon cardia bifida morphants raised at 22.5°C. The use of DNA microarrays, digital gene expression analyses, loss-of-function, as well as mRNA and protein rescue experiments, revealed that low temperature mitigates cardia bifida by regulating the expression of genes encoding components of the extracellular matrix (fibronectin 1, tenascin-c, tenascin-w). Furthermore, the addition of N-acetyl cysteine (NAC), a reactive oxygen species (ROS) scavenger, significantly decreased the effect of low temperature on mitigating cardia bifida in s1pr2as10 embryos. Our study reveals that temperature coordinates the development of the heart tube and somitogenesis, and that extracellular matrix genes (fibronectin 1, tenascin-c and tenascin-w) are involved.
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Affiliation(s)
- Che-Yi Lin
- Institute of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
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Huang J, Wang L, Shi H, Hou X. Effect of Lingguizhugan decoction on myocardial Nuclear factor kappa B protein expression in rats with chronic heart failure. J TRADIT CHIN MED 2013; 33:343-8. [DOI: 10.1016/s0254-6272(13)60176-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Parthasarathy A, Gopi V, Umadevi S, Simna A, Sheik MJY, Divya H, Vellaichamy E. Suppression of atrial natriuretic peptide/natriuretic peptide receptor-A-mediated signaling upregulates angiotensin-II-induced collagen synthesis in adult cardiac fibroblasts. Mol Cell Biochem 2013; 378:217-28. [DOI: 10.1007/s11010-013-1612-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 03/02/2013] [Indexed: 12/15/2022]
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Cai Y, Yu SS, Chen TT, Gao S, Geng B, Yu Y, Ye JT, Liu PQ. EGCG inhibits CTGF expression via blocking NF-κB activation in cardiac fibroblast. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2013; 20:106-13. [PMID: 23141425 DOI: 10.1016/j.phymed.2012.10.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Accepted: 10/11/2012] [Indexed: 05/25/2023]
Abstract
Connective tissue growth factor (CTGF) has been reported to play an important role in tissue fibrosis and presents a promising therapeutic target for fibrotic diseases. In heart, inappropriate increase in level of CTGF promotes fibroblast proliferation and extracellular matrix (ECM) accumulation, thereby exacerbating cardiac hypertrophy and subsequent failure. Epigallocatechin-3-gallate (EGCG), the major polyphenol found in green tea, possesses multiple protective effects on the cardiovascular system including cardiac fibrosis. However, the molecular mechanism by which EGCG exerts its anti-fibrotic effects has not been well investigated. In this study, we found that EGCG could significantly reduce collagen synthesis, fibronectin (FN) expression and cell proliferation in rat cardiac fibroblasts stimulated with angiotensinII (AngII). It also ameliorated cardiac fibrosis in rats submitted to abdominal aortic constriction (AAC). Moreover, EGCG attenuated the excessive expression of CTGF induced by AAC or AngII, and reduced the nuclear translocation of NF-κB p65 subunit and degradation of IκB-α. Subsequently, we demonstrated that in cardiac fibroblasts NF-κB inhibition could suppress AngII-induced CTGF expression. Taken together, these findings provide the first evidence that the effect of EGCG against cardiac fibrosis may be attributed to its inhibition on NF-κB activation and subsequent CTGF overexpression, suggesting the therapeutic potential of EGCG on the prevention of cardiac remodeling in patients with pressure overload hypertrophy.
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Affiliation(s)
- Yi Cai
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Higher Education Mega Center, Guangzhou 510006, Guangdong, PR China
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Wei C, Kumar S, Kim IK, Gupta S. Thymosin beta 4 protects cardiomyocytes from oxidative stress by targeting anti-oxidative enzymes and anti-apoptotic genes. PLoS One 2012; 7:e42586. [PMID: 22880044 PMCID: PMC3411836 DOI: 10.1371/journal.pone.0042586] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 07/09/2012] [Indexed: 01/04/2023] Open
Abstract
Background Thymosin beta-4 (Tβ4) is a ubiquitous protein with many properties relating to cell proliferation and differentiation that promotes wound healing and modulates inflammatory mediators. The mechanism by which Tβ4 modulates cardiac protection under oxidative stress is not known. The purpose of this study is to dissect the cardioprotective mechanism of Tβ4 on H2O2 induced cardiac damage. Methods Rat neonatal cardiomyocytes with or without Tβ4 pretreatment were exposed to H2O2 and expression of antioxidant, apoptotic, and anti-inflammatory genes was evaluated by quantitative real-time PCR and western blotting. ROS levels were estimated by DCF-DA using fluorescent microscopy and fluorimetry. Selected antioxidant, anti-inflammatory and antiapoptotic genes were silenced by siRNA transfections in neonatal cardiomyocytes and effect of Tβ4 on H2O2-induced cardiac damage was evaluated. Results Pre-treatment of Tβ4 resulted in reduction of the intracellular ROS levels induced by H2O2 in cardiomyocytes. Tβ4 pretreatment also resulted in an increase in the expression of antiapoptotic proteins and reduction of Bax/BCl2 ratio in the cardiomyocytes. Pretreatment with Tβ4 resulted in stimulating the expression of antioxidant enzymes copper/zinc SOD and catalase in cardiomyocytes at both transcription and translation levels. Tβ4 treatment resulted in the increased expression of anti-apoptotic and anti-inflammatory genes. Silencing of Cu/Zn SOD and catalase gene resulted in apoptotic cell death in the cardiomyocytes which was prevented by treatment with Tβ4. Conclusion This is the first report that demonstrates the effect of Tβ4 on cardiomyocytes and its capability to selectively upregulate anti-oxidative enzymes, anti-inflammatory genes, and antiapoptotic enzymes in the neonatal cardiomyocytes thus preventing cell death thereby protecting the myocardium. Tβ4 treatment resulted in decreased oxidative stress and inflammation in the myocardium under oxidative stress.
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Affiliation(s)
| | | | | | - Sudhiranjan Gupta
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A & M Health Science Center; Scott & White; Central Texas Veterans Health Care System, Temple, Texas, United States of America
- * E-mail:
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Kumar S, Wei C, Thomas CM, Kim IK, Seqqat R, Kumar R, Baker KM, Jones WK, Gupta S. Cardiac-specific genetic inhibition of nuclear factor-κB prevents right ventricular hypertrophy induced by monocrotaline. Am J Physiol Heart Circ Physiol 2012; 302:H1655-66. [DOI: 10.1152/ajpheart.00756.2011] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Uncontrolled pulmonary arterial hypertension (PAH) results in right ventricular (RV) hypertrophy (RVH), progressive RV failure, and low cardiac output leading to increased morbidity and mortality (McLaughlin VV, Archer SL, Badesch DB, Barst RJ, Farber HW, Lindner JR, Mathier MA, McGoon MD, Park MH, Rosenson RS, Rubin LJ, Tapson VF, Varga J. J Am Coll Cardiol 53: 1573–1619, 2009). Although the exact figures of its prevalence are difficult to obtain because of the diversity of identifiable causes, it is estimated that the incidence of pulmonary hypertension is seven to nine cases per million persons in the general population and is most prevalent in the age group of 20–40, occurring more commonly in women than in men (ratio: 1.7 to 1; Rubin LJ. N Engl J Med 336: 111–117, 1997). PAH is characterized by dyspnea, chest pain, and syncope. Unfortunately, there is no cure for this disease and medical regimens are limited (Simon MA. Curr Opin Crit Care 16: 237–243, 2010). PAH leads to adverse remodeling that results in RVH, progressive right heart failure, low cardiac output, and ultimately death if left untreated (Humbert M, Morrell NW, Archer SL, Stenmark KR, MacLean MR, Lang IM, Christman BW, Weir EK, Eickelberg O, Voelkel NF, Rabinovitch M. J Am Coll Cardiol 43: 13S-24S, 2004; Humbert M, Sitbon O, Simonneau G. N Engl J Med 351: 1425–1436, 2004. LaRaia AV, Waxman AB. South Med J 100: 393–399, 2007). As there are no direct tools to assess the onset and progression of PAH and RVH, the disease is often detected in later stages marked by full-blown RVH, with the outcome predominantly determined by the level of increased afterload (D'Alonzo GE, Barst RJ, Ayres SM, Bergofsky EH, Brundage BH, Detre KM, Fishman AP, Goldring RM, Groves BM, Kernis JT, et al. Ann Intern Med 115: 343–349, 1991; Sandoval J, Bauerle O, Palomar A, Gomez A, Martinez-Guerra ML, Beltran M, Guerrero ML. Validation of a prognostic equation Circulation 89: 1733–1744, 1994). Various studies have been performed to assess the genetic, biochemical, and morphological components that contribute to PAH. Despite major advances in the understanding of the pathogenesis of PAH, the molecular mechanism(s) by which PAH promotes RVH and cardiac failure still remains elusive. Of all the mechanisms involved in the pathogenesis, inflammation and oxidative stress remain the core of the etiology of PAH that leads to development of RVH (Dorfmüller P, Perros F, Balabanian K, Humbert M. Eur Respir J 22: 358–363, 2003).
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Affiliation(s)
- Sandeep Kumar
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A&M Health Science Center; Scott & White Hospital; Central Texas Veterans Health Care System, Temple, Texas; and
| | - Chuanyu Wei
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A&M Health Science Center; Scott & White Hospital; Central Texas Veterans Health Care System, Temple, Texas; and
| | - Candice M. Thomas
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A&M Health Science Center; Scott & White Hospital; Central Texas Veterans Health Care System, Temple, Texas; and
| | - Il-Kwon Kim
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A&M Health Science Center; Scott & White Hospital; Central Texas Veterans Health Care System, Temple, Texas; and
| | - Rachid Seqqat
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A&M Health Science Center; Scott & White Hospital; Central Texas Veterans Health Care System, Temple, Texas; and
| | - Rajesh Kumar
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A&M Health Science Center; Scott & White Hospital; Central Texas Veterans Health Care System, Temple, Texas; and
| | - Kenneth M. Baker
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A&M Health Science Center; Scott & White Hospital; Central Texas Veterans Health Care System, Temple, Texas; and
| | - W. Keith Jones
- Department of Pharmacology and Cell Biophysics, University of Cincinnati, Cincinnati, Ohio
| | - Sudhiranjan Gupta
- Division of Molecular Cardiology, Department of Medicine, College of Medicine, Texas A&M Health Science Center; Scott & White Hospital; Central Texas Veterans Health Care System, Temple, Texas; and
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Wang R, Xu YJ, Liu XS, Zeng DX, Xiang M. Knockdown of connective tissue growth factor by plasmid-based short hairpin RNA prevented pulmonary vascular remodeling in cigarette smoke-exposed rats. Arch Biochem Biophys 2011; 508:93-100. [PMID: 21295007 DOI: 10.1016/j.abb.2011.01.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2010] [Revised: 01/01/2011] [Accepted: 01/27/2011] [Indexed: 02/07/2023]
Abstract
Cigarette smoking may contribute to pulmonary hypertension in chronic obstructive pulmonary disease by resulting in pulmonary vascular remodeling that involves pulmonary artery smooth muscle cell proliferation. Connective tissue growth factor (CTGF) is a cysteine-rich peptide implicated in several biological processes such as cell proliferation, survival, and migration. This study investigated the potential role of CTGF in pulmonary vascular remodeling. We constructed a plasmid-based short hairpin RNA (shRNA) to knock down the expression of CTGF in primary cultured rat pulmonary artery smooth muscle cells (rPASMCs) and in rat lung vessels. Rat PASMCs were challenged with cigarette smoke extract (CSE). Rats were exposed to cigarette smoke for 3 months in the absence or in the presence of plasmid-based short hairpin RNA against CTGF which was administrated by tail vein injection. CTGFshRNA significantly prevented CTGF and cyclin D1 expression, arrested cell cycle at G0/G1 phase and suppressed cell proliferation in rPASMCs exposed to CSE. CTGFshRNA administration ameliorated pulmonary vascular remodeling, inhibited cigarette smoke-induced CTGF elevation and reversed the cyclin D1 increase in pulmonary vessels in rats. Collectively, our data demonstrated that plasmid-based shRNA against CTGF attenuated pulmonary vascular remodeling in cigarette smoke-exposed rats.
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Affiliation(s)
- Ran Wang
- Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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