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Han X, Hong Q, Peng F, Zhang Y, Wu L, Wang X, Zheng Y, Chen X. Hippo pathway activated by circulating reactive oxygen species mediates cardiac diastolic dysfunction after acute kidney injury. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167184. [PMID: 38648903 DOI: 10.1016/j.bbadis.2024.167184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 04/25/2024]
Abstract
Acute kidney injury (AKI) can cause distal cardiac dysfunction; however, the underlying mechanism is unknown. Oxidative stress is proved prominent in AKI-induced cardiac dysfunction, and a possible bridge role of oxidative-stress products in cardio-renal interaction has been reported. Therefore, this study aimed to investigate the critical role of circulating reactive oxygen species (ROS) in mediating cardiac dysfunction after bilateral renal ischemia-reperfusion injury (IRI). We observed the diastolic dysfunction in the mice following renal IRI, accompanied by reduced ATP levels, oxidative stress, and branched-chain amino acids (BCAA) accumulation in the heart. Notably, ROS levels showed a sequential increase in the kidneys, circulation, and heart. Treatment with tempol, an ROS scavenger, significantly restored cardiac diastolic function in the renal IRI mice, corroborating the bridge role of circulating ROS. Accumulating evidence has identified oxidative stress as upstream of Mst1/Hippo in cardiac injury, which could regulate the expression of downstream genes related to mitochondrial quality control, leading to lower ATP, higher ROS and metabolic disorder. To verify this, we examined the activation of the Mst1/Hippo pathway in the heart of renal IRI mice, which was alleviated by tempol treatment as well. In vitro, analysis revealed that Mst1-knockdown cardiomyocytes could be activated by hydrogen peroxide (H2O2). Analysis of Mst1-overexpression cardiomyocytes confirmed the critical role of the Mst1/Hippo pathway in oxidative stress and BCAA dysmetabolism. Therefore, our results indicated that circulating ROS following renal IRI activates the Mst1/Hippo pathway of myocardium, leading to cardiac oxidative stress and diastolic dysfunction. This finding provides new insights for the clinical exploration of improved treatment options for cardiorenal syndrome.
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Affiliation(s)
- Xiao Han
- Department of Nephrology, First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Chinese PLA Institute of Nephrology, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Chronic Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing 100853, China
| | - Quan Hong
- Department of Nephrology, First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Chinese PLA Institute of Nephrology, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Chronic Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing 100853, China
| | - Fei Peng
- Department of Nephrology, First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Chinese PLA Institute of Nephrology, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Chronic Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing 100853, China
| | - Yan Zhang
- Department of Nephrology, First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Chinese PLA Institute of Nephrology, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Chronic Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing 100853, China
| | - Lingling Wu
- Department of Nephrology, First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Chinese PLA Institute of Nephrology, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Chronic Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing 100853, China
| | - Xu Wang
- Department of Nephrology, First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Chinese PLA Institute of Nephrology, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Chronic Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing 100853, China
| | - Ying Zheng
- Department of Nephrology, First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Chinese PLA Institute of Nephrology, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Chronic Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing 100853, China.
| | - Xiangmei Chen
- Department of Nephrology, First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Chinese PLA Institute of Nephrology, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Chronic Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing 100853, China.
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2
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Owesny P, Grune T. The link between obesity and aging - insights into cardiac energy metabolism. Mech Ageing Dev 2023; 216:111870. [PMID: 37689316 DOI: 10.1016/j.mad.2023.111870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/04/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
Obesity and aging are well-established risk factors for a range of diseases, including cardiovascular diseases and type 2 diabetes. Given the escalating prevalence of obesity, the aging population, and the subsequent increase in cardiovascular diseases, it is crucial to investigate the underlying mechanisms involved. Both aging and obesity have profound effects on the energy metabolism through various mechanisms, including metabolic inflexibility, altered substrate utilization for energy production, deregulated nutrient sensing, and mitochondrial dysfunction. In this review, we aim to present and discuss the hypothesis that obesity, due to its similarity in changes observed in the aging heart, may accelerate the process of cardiac aging and exacerbate the clinical outcomes of elderly individuals with obesity.
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Affiliation(s)
- Patricia Owesny
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; DZHK (German Center for Cardiovascular Research), partner site Berlin, Berlin, Germany
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; DZHK (German Center for Cardiovascular Research), partner site Berlin, Berlin, Germany; German Center for Diabetes Research (DZD), München-Neuherberg, Germany.
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3
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Tocantins C, Martins JD, Rodrigues ÓM, Grilo LF, Diniz MS, Stevanovic-Silva J, Beleza J, Coxito P, Rizo-Roca D, Santos-Alves E, Rios M, Carvalho L, Moreno AJ, Ascensão A, Magalhães J, Oliveira PJ, Pereira SP. Metabolic mitochondrial alterations prevail in the female rat heart 8 weeks after exercise cessation. Eur J Clin Invest 2023; 53:e14069. [PMID: 37525474 DOI: 10.1111/eci.14069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/15/2023] [Accepted: 06/30/2023] [Indexed: 08/02/2023]
Abstract
BACKGROUND The consumption of high-caloric diets strongly contributes to the development of non-communicable diseases (NCDs), including cardiovascular disease, the leading cause of mortality worldwide. Exercise (along with diet intervention) is one of the primary non-pharmacological approaches to promote a healthier lifestyle and counteract the rampant prevalence of NCDs. The present study evaluated the effects of exercise cessation after a short period training on the cardiac metabolic and mitochondrial function of female rats. METHODS Seven-week-old female Sprague-Dawley rats were fed a control or a high-fat, high-sugar (HFHS) diet and, after 7 weeks, the animals were kept on a sedentary lifestyle or submitted to endurance exercise for 3 weeks (6 days per week, 20-60 min/day). The cardiac samples were analysed 8 weeks after exercise cessation. RESULTS The consumption of the HFHS diet triggered impaired glucose tolerance, whereas the HFHS diet and physical exercise resulted in different responses in plasma adiponectin and leptin levels. Cardiac mitochondrial respiration efficiency was decreased by the HFHS diet consumption, which led to reduced ATP and increased NAD(P)H mitochondrial levels, which remained prevented by exercise 8 weeks after cessation. Exercise training-induced cardiac adaptations in redox balance, namely increased relative expression of Nrf2 and downstream antioxidant enzymes persist after an eight-week exercise cessation period. CONCLUSIONS Endurance exercise modulated cardiac redox balance and mitochondrial efficiency in female rats fed a HFHS diet. These findings suggest that exercise may elicit cardiac adaptations crucial for its role as a non-pharmacological intervention for individuals at risk of developing NCDs.
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Affiliation(s)
- Carolina Tocantins
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
- PhD Programme in Experimental Biology and Biomedicine (PDBEB), Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Coimbra, Portugal
| | - João D Martins
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
| | - Óscar M Rodrigues
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
| | - Luís F Grilo
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
- PhD Programme in Experimental Biology and Biomedicine (PDBEB), Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Coimbra, Portugal
| | - Mariana S Diniz
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
- PhD Programme in Experimental Biology and Biomedicine (PDBEB), Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Coimbra, Portugal
| | - Jelena Stevanovic-Silva
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
| | - Jorge Beleza
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
| | - Pedro Coxito
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
| | - David Rizo-Roca
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
- Department of Cell Biology, Physiology & Immunology, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Estela Santos-Alves
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
| | - Manoel Rios
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
| | - Lina Carvalho
- Institute of Anatomical and Molecular Pathology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - António J Moreno
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
- Department of Life Sciences, School of Sciences and Technology, University of Coimbra, Coimbra, Portugal
| | - António Ascensão
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
| | - José Magalhães
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
| | - Paulo J Oliveira
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
| | - Susana P Pereira
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
- Laboratory of Metabolism and Exercise (LaMetEx), Research Centre in Physical Activity, Health and Leisure (CIAFEL), Laboratory for Integrative and Translational Research in Population Health (ITR), Faculty of Sports, University of Porto, Porto, Portugal
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Antonopoulos AS, Papastamos C, Cokkinos DV, Tsioufis K, Tousoulis D. Epicardial Adipose Tissue in Myocardial Disease: From Physiology to Heart Failure Phenotypes. Curr Probl Cardiol 2023; 48:101841. [PMID: 37244513 DOI: 10.1016/j.cpcardiol.2023.101841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 05/22/2023] [Indexed: 05/29/2023]
Abstract
Epicardial adipose tissue (EAT) is increasingly being recognized as a determinant of myocardial biology. The EAT-heart crosstalk suggests causal links between dysfunctional EAT and cardiomyocyte impairment. Obesity promotes EAT dysfunction and shifts in secreted adipokines which adversely affect cardiac metabolism, induce cardiomyocyte inflammation, redox imbalance and myocardial fibrosis. Thus, EAT determines cardiac phenotype via effects on cardiac energetics, contractility, diastolic function, and atrial conduction. Vice-versa the EAT is altered in heart failure (HF), and such phenotypic changes can be detected by noninvasive imaging or incorporated in Artificial Intelligence-enhanced tools to aid the diagnosis, subtyping or risk prognostication of HF. In the present article, we summarize the links between EAT and the heart, explaining how the study of epicardial adiposity can improve the understanding of cardiac disease, serve as a source of diagnostic and prognostic biomarkers, and as a potential therapeutic target in HF to improve clinical outcomes.
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Affiliation(s)
- Alexios S Antonopoulos
- 1st Cardiology Department, National and Kapodistrian University of Athens, Athens, Greece; Clinical, Experimental Surgery and Translational Research Centre, Biomedical Research Foundation Academy of Athens, Athens, Greece.
| | - Charalampos Papastamos
- 1st Cardiology Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Dennis V Cokkinos
- Clinical, Experimental Surgery and Translational Research Centre, Biomedical Research Foundation Academy of Athens, Athens, Greece
| | - Konstantinos Tsioufis
- 1st Cardiology Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitris Tousoulis
- 1st Cardiology Department, National and Kapodistrian University of Athens, Athens, Greece
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5
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de Oliveira Lopes R, Lima GF, Mendes ABA, Autran LJ, de Assis Pereira NC, Brazão SC, Alexandre-Santos B, Frantz EDC, Scaramello CBV, Brito FCF, Motta NAV. Cilostazol attenuates cardiac oxidative stress and inflammation in hypercholesterolemic rats. Naunyn Schmiedebergs Arch Pharmacol 2022; 395:789-801. [PMID: 35384464 DOI: 10.1007/s00210-022-02233-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 03/16/2022] [Indexed: 10/18/2022]
Abstract
Atherosclerosis is a multifactorial chronic disease associated with pro-inflammatory and pro-oxidative cardiovascular states. Cilostazol, a selective phosphodiesterase 3 inhibitor (PDE3), is clinically used in the treatment of intermittent claudication and secondary prevention of cerebral infarction. The aim of this study was to evaluate the cardioprotective effects of cilostazol and the molecular mechanisms involved in hypercholesterolemic rats. Male Wistar rats were divided into four groups: control group (C) and control + cilostazol group (C+CILO), that were fed a standard chow diet, and hypercholesterolemic diet group (HCD) and HCD + cilostazol (HCD+CILO) that were fed a hypercholesterolemic diet. Cilostazol treatment started after 30 days for C+CILO and HCD+CILO groups. Animals were administered cilostazol once a day for 15 days. Subsequently, serum and left ventricles were extracted for evaluation of lipid profile, inflammatory, and oxidative biomarkers. The HCD group displayed increased serum lipid levels, inflammatory cytokines production, and cardiac NF-kB protein expression and decreased cardiac Nrf2-mediated antioxidant activity. Conversely, the cilostazol treatment improved all these cardiac deleterious effects, inhibiting NF-kB activation and subsequently decreasing inflammatory mediators, reestablishing the antioxidant properties through Nrf2-mediated pathway, including increased SOD, GPx, and catalase expression. Taken together, our results indicated that cilostazol protects hypercholesterolemia-induced cardiac damage by molecular mechanisms targeting the crosstalk between Nrf2 induction and NF-kB inhibition in the heart.
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Affiliation(s)
- Rosane de Oliveira Lopes
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil
| | - Gabriel Ferreira Lima
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil
| | - Ana Beatriz Araújo Mendes
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil.,Laboratory of Endocrine Physiology Doris Rosenthal, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Lis Jappour Autran
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil
| | - Nikolas Cunha de Assis Pereira
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil
| | - Stephani Correia Brazão
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil
| | - Beatriz Alexandre-Santos
- Laboratory of Exercise Sciences (LACE), Department of Morphology, Fluminense Federal University (UFF), Niteroi, RJ, Brazil
| | - Eliete Dalla Corte Frantz
- Laboratory of Exercise Sciences (LACE), Department of Morphology, Fluminense Federal University (UFF), Niteroi, RJ, Brazil
| | - Christianne Brêtas Vieira Scaramello
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil
| | - Fernanda Carla Ferreira Brito
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil.
| | - Nadia Alice Vieira Motta
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, Niteroi, RJ, 24210-130, Brazil
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Kang KW, Ko JY, Lee H, Shin SY, Lee WS, Hong J, Kim SW, Lee SK, Oak MH. Surgically Metabolic Resection of Pericardial Fat to Ameliorate Myocardial Mitochondrial Dysfunction in Acute Myocardial Infarction Obese Rats. J Korean Med Sci 2022; 37:e55. [PMID: 35257523 PMCID: PMC8901878 DOI: 10.3346/jkms.2022.37.e55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 01/24/2022] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Pericardial fat (PF) is highly associated with cardiovascular disease but the effectiveness of surgical resection of PF is still unknown for myocardial mitochondrial structure and function in acute myocardial infarction (AMI) with obesity. The aim of this study was to demonstrate the difference in myocardial mitochondrial structure and function between obese AMI with additionally resected PF and those without resected PF. METHODS Obese rats with 12-week high fat diet (45 kcal% fat, n = 21) were randomly assigned into 3 groups: obese control, obese AMI and obese AMI with additionally resected PF. One week after developing AMI and additional resection of PF, echocardiogram, myocardial mitochondrial histomorphology, oxidative phosphorylation system (OXPHOS), anti-oxidative enzyme and sarcoplasmic reticulum Ca2+ ATPase 2 (SERCA2) in the non-infarcted area were assessed between these groups. RESULTS There was significant improvement of systolic function in AMI with PF resection compared with the AMI group in the echocardiogram. Even though the electron microscopic morphology for the mitochondria seems to be similar between the AMI with PF resection and AMI groups, there was an improved expression of PGC-1α and responsive OXPHOS including NDUFB3, NDUFB5 and SDHB are associated with the ATP levels in the AMI with PF resection compared with those in the AMI group. In addition, the expression levels of antioxidant enzymes (MnSOD) and SERCA2 were improved in the AMI with PF resection compared with those in the AMI group. CONCLUSION Surgical resection of PF might ameliorate myocardial mitochondria dysfunction in obese AMI.
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Affiliation(s)
- Ki-Woon Kang
- Division of Cardiology, College of Medicine, Heart Research Institute and Biomedical Research Institute, Chung-Ang University Hospital, Chung-Ang University, Seoul, Korea.
| | - Ju-Young Ko
- College of Pharmacy, Mokpo National University, Muan, Korea
| | - Hyunghee Lee
- Division of Cardiology, College of Medicine, Heart Research Institute and Biomedical Research Institute, Chung-Ang University Hospital, Chung-Ang University, Seoul, Korea
| | - Seung Yong Shin
- Division of Cardiology, College of Medicine, Heart Research Institute and Biomedical Research Institute, Chung-Ang University Hospital, Chung-Ang University, Seoul, Korea
| | - Wang Soo Lee
- Division of Cardiology, College of Medicine, Heart Research Institute and Biomedical Research Institute, Chung-Ang University Hospital, Chung-Ang University, Seoul, Korea
| | - Joonhwa Hong
- Division of Cardiothoracic Surgery, College of Medicine, Chung-Ang University Hospital, Chung-Ang University, Seoul, Korea
| | - Sang-Wook Kim
- Division of Cardiology, College of Medicine, Heart Research Institute and Biomedical Research Institute, Chung-Ang University Hospital, Chung-Ang University, Seoul, Korea
| | - Seong-Kyu Lee
- Department of Biochemistry and Molecular Biology, School of Medicine, Eulji University, Daejeon, Korea
| | - Min-Ho Oak
- College of Pharmacy, Mokpo National University, Muan, Korea.
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7
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Nyawo TA, Pheiffer C, Mazibuko-Mbeje SE, Mthembu SXH, Nyambuya TM, Nkambule BB, Sadie-Van Gijsen H, Strijdom H, Tiano L, Dludla PV. Physical Exercise Potentially Targets Epicardial Adipose Tissue to Reduce Cardiovascular Disease Risk in Patients with Metabolic Diseases: Oxidative Stress and Inflammation Emerge as Major Therapeutic Targets. Antioxidants (Basel) 2021; 10:1758. [PMID: 34829629 PMCID: PMC8614861 DOI: 10.3390/antiox10111758] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 10/29/2021] [Accepted: 11/01/2021] [Indexed: 12/25/2022] Open
Abstract
Excess epicardial adiposity, within a state of obesity and metabolic syndrome, is emerging as an important risk factor for the development of cardiovascular diseases (CVDs). Accordingly, increased epicardial fat thickness (EFT) implicates the exacerbation of pathological mechanisms involving oxidative stress and inflammation within the heart, which may accelerate the development of CVDs. This explains increased interest in targeting EFT reduction to attenuate the detrimental effects of oxidative stress and inflammation within the setting of metabolic syndrome. Here, we critically discuss clinical and preclinical evidence on the impact of physical exercise on EFT in correlation with reduced CVD risk within a setting of metabolic disease. This review also brings a unique perspective on the implications of oxidative stress and inflammation as major pathological consequences that link increased EFT to accelerated CVD risk in conditions of metabolic disease.
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Affiliation(s)
- Thembeka A. Nyawo
- Biomedical Research and Innovation Platform, South African Medical Research Council, Cape Town 7505, South Africa; (T.A.N.); (C.P.); (S.X.H.M.)
- Centre for Cardiometabolic Research in Africa (CARMA), Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town 7505, South Africa; (H.S.-V.G.); (H.S.)
| | - Carmen Pheiffer
- Biomedical Research and Innovation Platform, South African Medical Research Council, Cape Town 7505, South Africa; (T.A.N.); (C.P.); (S.X.H.M.)
- Centre for Cardiometabolic Research in Africa (CARMA), Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town 7505, South Africa; (H.S.-V.G.); (H.S.)
- Department of Obstetrics and Gynaecology, Faculty of Health Sciences, University of Pretoria, Pretoria 0001, South Africa
| | | | - Sinenhlanhla X. H. Mthembu
- Biomedical Research and Innovation Platform, South African Medical Research Council, Cape Town 7505, South Africa; (T.A.N.); (C.P.); (S.X.H.M.)
- Department of Biochemistry, North-West University, Mafikeng Campus, Mmabatho 2735, South Africa;
| | - Tawanda M. Nyambuya
- Department of Health Sciences, Faculty of Health and Applied Sciences, Namibia University of Science and Technology, Windhoek 9000, Namibia;
| | - Bongani B. Nkambule
- School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa;
| | - Hanél Sadie-Van Gijsen
- Centre for Cardiometabolic Research in Africa (CARMA), Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town 7505, South Africa; (H.S.-V.G.); (H.S.)
| | - Hans Strijdom
- Centre for Cardiometabolic Research in Africa (CARMA), Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town 7505, South Africa; (H.S.-V.G.); (H.S.)
| | - Luca Tiano
- Department of Life and Environmental Sciences, Polytechnic University of Marche, 60131 Ancona, Italy;
| | - Phiwayinkosi V. Dludla
- Biomedical Research and Innovation Platform, South African Medical Research Council, Cape Town 7505, South Africa; (T.A.N.); (C.P.); (S.X.H.M.)
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8
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Majeed Y, Halabi N, Madani AY, Engelke R, Bhagwat AM, Abdesselem H, Agha MV, Vakayil M, Courjaret R, Goswami N, Hamidane HB, Elrayess MA, Rafii A, Graumann J, Schmidt F, Mazloum NA. SIRT1 promotes lipid metabolism and mitochondrial biogenesis in adipocytes and coordinates adipogenesis by targeting key enzymatic pathways. Sci Rep 2021; 11:8177. [PMID: 33854178 PMCID: PMC8046990 DOI: 10.1038/s41598-021-87759-x] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 04/01/2021] [Indexed: 12/31/2022] Open
Abstract
The NAD+-dependent deacetylase SIRT1 controls key metabolic functions by deacetylating target proteins and strategies that promote SIRT1 function such as SIRT1 overexpression or NAD+ boosters alleviate metabolic complications. We previously reported that SIRT1-depletion in 3T3-L1 preadipocytes led to C-Myc activation, adipocyte hyperplasia, and dysregulated adipocyte metabolism. Here, we characterized SIRT1-depleted adipocytes by quantitative mass spectrometry-based proteomics, gene-expression and biochemical analyses, and mitochondrial studies. We found that SIRT1 promoted mitochondrial biogenesis and respiration in adipocytes and expression of molecules like leptin, adiponectin, matrix metalloproteinases, lipocalin 2, and thyroid responsive protein was SIRT1-dependent. Independent validation of the proteomics dataset uncovered SIRT1-dependence of SREBF1c and PPARα signaling in adipocytes. SIRT1 promoted nicotinamide mononucleotide acetyltransferase 2 (NMNAT2) expression during 3T3-L1 differentiation and constitutively repressed NMNAT1 and 3 levels. Supplementing preadipocytes with the NAD+ booster nicotinamide mononucleotide (NMN) during differentiation increased expression levels of leptin, SIRT1, and PGC-1α and its transcriptional targets, and reduced levels of pro-fibrotic collagens (Col6A1 and Col6A3) in a SIRT1-dependent manner. Investigating the metabolic impact of the functional interaction of SIRT1 with SREBF1c and PPARα and insights into how NAD+ metabolism modulates adipocyte function could potentially lead to new avenues in developing therapeutics for obesity complications.
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Affiliation(s)
- Yasser Majeed
- Department of Microbiology and Immunology, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
| | - Najeeb Halabi
- Department of Genetic Medicine, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
| | - Aisha Y Madani
- Department of Microbiology and Immunology, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Rudolf Engelke
- Department of Biochemistry, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
| | - Aditya M Bhagwat
- Department of Biochemistry, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
- Biomolecular Mass Spectrometry, Max-Plank Institute for Heart and Lung Research, Ludwigstr 43, 61231, Bad Nauheim, Germany
| | - Houari Abdesselem
- Department of Microbiology and Immunology, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
- Neurological Disorders Research Center, Qatar Biomedical Research Institute, Qatar Foundation, Doha, Qatar
| | - Maha V Agha
- Department of Microbiology and Immunology, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
- Interim Translational Research Institute, Hamad Medical Corporation, Doha, Qatar
| | - Muneera Vakayil
- Department of Microbiology and Immunology, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Raphael Courjaret
- Department of Physiology and Biophysics, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
| | - Neha Goswami
- Department of Biochemistry, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
| | - Hisham Ben Hamidane
- Department of Biochemistry, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
- CSL Behring, Bern, Switzerland
| | | | - Arash Rafii
- Department of Genetic Medicine, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
| | - Johannes Graumann
- Department of Biochemistry, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
- Biomolecular Mass Spectrometry, Max-Plank Institute for Heart and Lung Research, Ludwigstr 43, 61231, Bad Nauheim, Germany
| | - Frank Schmidt
- Department of Biochemistry, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar
| | - Nayef A Mazloum
- Department of Microbiology and Immunology, Weill Cornell Medicine-Qatar, Qatar Foundation, Doha, Qatar.
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9
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Briand F, Brousseau E, Maupoint J, Dubroca C, Costard C, Breyner N, Burcelin R, Sulpice T. Liraglutide shows superior cardiometabolic benefits than lorcaserin in a novel free choice diet-induced obese rat model. Eur J Pharmacol 2020; 882:173316. [DOI: 10.1016/j.ejphar.2020.173316] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 12/15/2022]
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10
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Kang K, Li J, Li R, Xu X, Liu J, Qin L, Huang T, Wu J, Jiao M, Wei M, Wang H, Wang T, Zhang Q. Potentially Critical Roles of NDUFB5, TIMMDC1, and VDAC3 in the Progression of Septic Cardiomyopathy Through Integrated Bioinformatics Analysis. DNA Cell Biol 2019; 39:105-117. [PMID: 31794266 DOI: 10.1089/dna.2019.4859] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Septic cardiomyopathy (SC) is a rare and harmful cardiovascular disease with decreased left ventricular (LV) output and multiple organ failure, which poses a serious threat to human life. Despite the advances in SC, its diagnostic basis and treatment methods are limited, and the specific diagnostic biomarkers and its candidate regulatory targets have not yet been fully established. In this study, the GSE79962 gene expression profile was retrieved, with 20 patients with SC and 11 healthy donors as control. Weighted gene coexpression network analysis (WGCNA) was employed to investigate gene modules that were strongly correlated with clinical phenotypes. Blue module was found to be most significantly related to SC. Moreover, Gene Ontology (GO) functional enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were performed on the coexpression genes in blue module and showed that it was associated with metabolic pathways, oxidative phosphorylation, and cardiac muscle contraction. Furthermore, a total of 10 hub genes NDUFB5, TIMMDC1, VDAC3, COQ10A, MRPL16 (mitochondrial ribosomal protein L16), C3orf43, TMEM182, DLAT, NDUFA8, and PDHB (pyruvate dehydrogenase E1 beta subunit) in the blue module were identified at transcriptional level and further validated at translational level in myocardium of an lipopolysaccharide-induced septic cardiac dysfunction mouse model. Overall, the results of quantitative real-time polymerase chain reaction were consistent with most of the microarray analysis results. Intriguingly, we observed that the highest change was NDUFB5, TIMMDC1, and VDAC3. These identified and validated genes provided references that would advance the understanding of molecular mechanisms of SC. Taken together, using WGCNA, the hub genes NDUFB5, TIMMDC1, and VDAC3 might serve as potential biomarkers for diagnosis and/or therapeutic targets for precise treatment of SC in the future.
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Affiliation(s)
- Kai Kang
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Jingtian Li
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Ruidong Li
- Graduate Program in Genetics, Genomics, and Bioinformatics, University of California, Riverside, Riverside, California
| | - Xiufeng Xu
- Department of Neurology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Jianli Liu
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Limin Qin
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Tao Huang
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Jinhua Wu
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Min Jiao
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Miaomiao Wei
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Hongjie Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tao Wang
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Quan Zhang
- Department of Cardiology of Affiliated Hospital, Weifang Medical University, Weifang, China
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11
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Wen DT, Zheng L, Li JX, Cheng D, Liu Y, Lu K, Hou WQ. Endurance exercise resistance to lipotoxic cardiomyopathy is associated with cardiac NAD +/dSIR2/ PGC-1α pathway activation in old Drosophila. Biol Open 2019; 8:bio044719. [PMID: 31624074 PMCID: PMC6826281 DOI: 10.1242/bio.044719] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 09/23/2019] [Indexed: 12/17/2022] Open
Abstract
Lipotoxic cardiomyopathy is caused by excessive lipid accumulation in myocardial cells and it is a form of cardiac dysfunction. Cardiac PGC-1α overexpression prevents lipotoxic cardiomyopathy induced by a high-fat diet (HFD). The level of NAD+ and Sir2 expression upregulate the transcriptional activity of PGC-1α. Exercise improves cardiac NAD+ level and PGC-1α activity. However, the relationship between exercise, NAD+/dSIR2/PGC-1α pathway and lipotoxic cardiomyopathy remains unknown. In this study, flies were fed a HFD and exercised. The heart dSir2 gene was specifically expressed or knocked down by UAS/hand-Gal4 system. The results showed that either a HFD or dSir2 knockdown remarkably increased cardiac TG level and d FAS expression, reduced heart fractional shortening and diastolic diameter, increased arrhythmia index, and decreased heart NAD+ level, dSIR2 protein, dSir2 and PGC-1α expression levels. Contrarily, either exercise or dSir2 overexpression remarkably reduced heart TG level, dFAS expression and arrhythmia index, and notably increased heart fractional shortening, diastolic diameter, NAD+ level, dSIR2 level, and heart dSir2 and PGC-1α expression. Therefore, we declared that exercise training could improve lipotoxic cardiomyopathy induced by a HFD or cardiac dSir2 knockdown in old Drosophila The NAD+/dSIR2/PGC-1α pathway activation was an important molecular mechanism of exercise resistance against lipotoxic cardiomyopathy.
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Affiliation(s)
- Deng-Tai Wen
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha 410012, Hunan Province, China
- Department of Sports Science, Ludong University, Yantai 264025, Shandong Province, China
| | - Lan Zheng
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha 410012, Hunan Province, China
| | - Jin-Xiu Li
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha 410012, Hunan Province, China
| | - Dan Cheng
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha 410012, Hunan Province, China
| | - Yang Liu
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha 410012, Hunan Province, China
| | - Kai Lu
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha 410012, Hunan Province, China
| | - Wen-Qi Hou
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha 410012, Hunan Province, China
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12
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de Moura Freitas C, Nascimento LCPD, Braz GRF, Andrade-Silva SC, Lima-Junior NC, de Araujo Silva T, Fernandes MP, Ferreira DJS, Lagranha CJ. Mitochondrial impairment following neonatal overfeeding: A comparison between normal and ischemic-reperfused hearts. J Cell Biochem 2019; 120:7341-7352. [PMID: 30368910 DOI: 10.1002/jcb.28009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 10/10/2018] [Indexed: 01/24/2023]
Abstract
Overweight and obesity are established factors underpin several metabolic impairments, including the cardiovascular. Although the diversity of factors involved in overweight/obesity-induced cardiovascular diseases, mitochondria has been highlighted due to its role in cardiac metabolism. As obesity can be originated in early postnatal life, the current study evaluates the effects of neonatal overfeeding on the cardiac mitochondrial bioenergetics and oxidative balance in rats that underwent an ischemia-reperfusion insult. Seventy-two hours after delivery, Wistar rat litters were randomly assigned into the control (C; nine pups per mother) and the Overfed (OF; three pups per mother) groups throughout the lactation period. At weaning, male offspring were fed with laboratory chow ad libitum until sacrifice at 30 and 60 days of life. Mitochondrial heart bioenergetics and oxidative balance showed to be deeply affected by neonatal overfeeding at both ages. Interestingly, after ischemia-reperfusion insult I/R (Langendorff or mineral oil incubation), most parameters evaluated in OF animals were not influenced by additional ischemic-reperfusion injury. Our findings demonstrated that suckling overfeeding deregulates cardiac mitochondrial alike to ischemia-reperfusion insult by disengaging electrical mitochondrial coupling and potentiate oxidative stress, wherein the neonatal overfeeding shows to be so detrimental as I/R. Our findings support the concept that nutritional insults in the critical development periods increase the risk for cardiovascular disease and mitochondria impairments throughout life while oxidative damage change between molecular targets.
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Affiliation(s)
- Cristiane de Moura Freitas
- Laboratory of Biochemistry and Exercise Biochemistry, Biochemistry and Physiology Graduate Program, CAV-Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Luciana Caroline Paulino do Nascimento
- Laboratory of Biochemistry and Exercise Biochemistry, Biochemistry and Physiology Graduate Program, CAV-Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Glauber Rudá Feitoza Braz
- Laboratory of Biochemistry and Exercise Biochemistry, Neuropsychiatry and Behavioral Science Graduate Program, CAV-Federal University of Pernambuco, Recife, Brazil
| | - Severina Cassia Andrade-Silva
- Laboratory of Biochemistry and Exercise Biochemistry, Biochemistry and Physiology Graduate Program, CAV-Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Nelson C Lima-Junior
- Department of Physical Education and Sports Science, Laboratory of Biochemistry and Exercise Biochemistry, CAV- Federal University of Pernambuco, Brazil
| | - Tercya de Araujo Silva
- Laboratory of Biochemistry and Exercise Biochemistry, Neuropsychiatry and Behavioral Science Graduate Program, CAV-Federal University of Pernambuco, Recife, Brazil
| | - Mariana Pinheiro Fernandes
- Department of Physical Education and Sports Science, Laboratory of Biochemistry and Exercise Biochemistry, CAV- Federal University of Pernambuco, Brazil
| | | | - Claudia Jacques Lagranha
- Laboratory of Biochemistry and Exercise Biochemistry, Biochemistry and Physiology Graduate Program, CAV-Federal University of Pernambuco, Recife, Pernambuco, Brazil.,Laboratory of Biochemistry and Exercise Biochemistry, Neuropsychiatry and Behavioral Science Graduate Program, CAV-Federal University of Pernambuco, Recife, Brazil.,Department of Physical Education and Sports Science, Laboratory of Biochemistry and Exercise Biochemistry, CAV- Federal University of Pernambuco, Brazil
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13
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Qiliqiangxin Enhances Cardiac Glucose Metabolism and Improves Diastolic Function in Spontaneously Hypertensive Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:3197320. [PMID: 28706558 PMCID: PMC5494577 DOI: 10.1155/2017/3197320] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 04/08/2017] [Accepted: 05/07/2017] [Indexed: 01/19/2023]
Abstract
Cardiac diastolic dysfunction has emerged as a growing type of heart failure. The present study aims to explore whether Qiliqiangxin (QL) can benefit cardiac diastolic function in spontaneously hypertensive rat (SHR) through enhancement of cardiac glucose metabolism. Fifteen 12-month-old male SHRs were randomly divided into QL-treated, olmesartan-treated, and saline-treated groups. Age-matched WKY rats served as normal controls. Echocardiography and histological analysis were performed. Myocardial glucose uptake was determined by 18F-FDG using small-animal PET imaging. Expressions of several crucial proteins and key enzymes related to glucose metabolism were also evaluated. As a result, QL improved cardiac diastolic function in SHRs, as evidenced by increased E′/A′and decreased E/E′ (P < 0.01). Meanwhile, QL alleviated myocardial hypertrophy, collagen deposits, and apoptosis (P < 0.01). An even higher myocardial glucose uptake was illustrated in QL-treated SHR group (P < 0.01). Moreover, an increased CS activity and ATP production was observed in QL-treated SHRs (P < 0.05). QL enhanced cardiac glucose utilization and oxidative phosphorylation in SHRs by upregulating AMPK/PGC-1α axis, promoting GLUT-4 expression, and regulating key enzymes related to glucose aerobic oxidation such as HK2, PDK4, and CS (P < 0.01). Our data suggests that QL improves cardiac diastolic function in SHRs, which may be associated with enhancement of myocardial glucose metabolism.
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14
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Hotta K, Chen B, Behnke BJ, Ghosh P, Stabley JN, Bramy JA, Sepulveda JL, Delp MD, Muller-Delp JM. Exercise training reverses age-induced diastolic dysfunction and restores coronary microvascular function. J Physiol 2017; 595:3703-3719. [PMID: 28295341 PMCID: PMC5471361 DOI: 10.1113/jp274172] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Accepted: 02/20/2017] [Indexed: 12/14/2022] Open
Abstract
KEY POINTS In a rat model of ageing that is free of atherosclerosis or hypertension, E/A, a diagnostic measure of diastolic filling, decreases, and isovolumic relaxation time increases, indicating that both active and passive ventricular relaxation are impaired with advancing age. Resting coronary blood flow and coronary functional hyperaemia are reduced with age, and endothelium-dependent vasodilatation declines with age in coronary resistance arterioles. Exercise training reverses age-induced declines in diastolic and coronary microvascular function. Thus, microvascular dysfunction and inadequate coronary perfusion are likely mechanisms of diastolic dysfunction in aged rats. Exercise training, initiated at an advanced age, reverses age-related diastolic and microvascular dysfunction; these data suggest that late-life exercise training can be implemented to improve coronary perfusion and diastolic function in the elderly. ABSTRACT The risk for diastolic dysfunction increases with advancing age. Regular exercise training ameliorates age-related diastolic dysfunction; however, the underlying mechanisms have not been identified. We investigated whether (1) microvascular dysfunction contributes to the development of age-related diastolic dysfunction, and (2) initiation of late-life exercise training reverses age-related diastolic and microvascular dysfunction. Young and old rats underwent 10 weeks of exercise training or remained as sedentary, cage-controls. Isovolumic relaxation time (IVRT), early diastolic filling (E/A), myocardial performance index (MPI) and aortic stiffness (pulse wave velocity; PWV) were evaluated before and after exercise training or cage confinement. Coronary blood flow and vasodilatory responses of coronary arterioles were evaluated in all groups at the end of training. In aged sedentary rats, compared to young sedentary rats, a 42% increase in IVRT, a 64% decrease in E/A, and increased aortic stiffness (PWV: 6.36 ± 0.47 vs.4.89 ± 0.41, OSED vs. YSED, P < 0.05) was accompanied by impaired coronary blood flow at rest and during exercise. Endothelium-dependent vasodilatation was impaired in coronary arterioles from aged rats (maximal relaxation to bradykinin: 56.4 ± 5.1% vs. 75.3 ± 5.2%, OSED vs. YSED, P < 0.05). After exercise training, IVRT, a measure of active ventricular relaxation, did not differ between old and young rats. In old rats, exercise training reversed the reduction in E/A, reduced aortic stiffness, and eliminated impairment of coronary blood flow responses and endothelium-dependent vasodilatation. Thus, age-related diastolic and microvascular dysfunction are reversed by late-life exercise training. The restorative effect of exercise training on coronary microvascular function may result from improved endothelial function.
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Affiliation(s)
- Kazuki Hotta
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
| | - Bei Chen
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, FL, USA
| | - Bradley J Behnke
- Department of Kinesiology & Johnson Cancer Research Center, Kansas State University, Manhattan, KS, USA
| | - Payal Ghosh
- Department of Nutrition, Food and Exercise Sciences, Florida State University, Tallahassee, FL, USA
| | - John N Stabley
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jeremy A Bramy
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
| | - Jaime L Sepulveda
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
| | - Michael D Delp
- Department of Nutrition, Food and Exercise Sciences, Florida State University, Tallahassee, FL, USA
| | - Judy M Muller-Delp
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
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