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Sha R, Baines O, Hayes A, Tompkins K, Kalla M, Holmes AP, O'Shea C, Pavlovic D. Impact of Obesity on Atrial Fibrillation Pathogenesis and Treatment Options. J Am Heart Assoc 2024; 13:e032277. [PMID: 38156451 PMCID: PMC10863823 DOI: 10.1161/jaha.123.032277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
Atrial fibrillation (AF) is the most common cardiac arrhythmia. AF increases the risk of stroke, heart failure, dementia, and hospitalization. Obesity significantly increases AF risk, both directly and indirectly, through related conditions, like hypertension, diabetes, and heart failure. Obesity-driven structural and electrical remodeling contribute to AF via several reported mechanisms, including adiposity, inflammation, fibrosis, oxidative stress, ion channel alterations, and autonomic dysfunction. In particular, expanding epicardial adipose tissue during obesity has been suggested as a key driver of AF via paracrine signaling and direct infiltration. Weight loss has been shown to reverse these changes and reduce AF risk and recurrence after ablation. However, studies on how obesity affects pharmacologic or interventional AF treatments are limited. In this review, we discuss mechanisms by which obesity mediates AF and treatment outcomes, aiming to provide insight into obesity-drug interactions and guide personalized treatment for this patient subgroup.
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Affiliation(s)
- Rina Sha
- Institute of Cardiovascular Sciences, University of BirminghamBirminghamUnited Kingdom
| | - Olivia Baines
- Institute of Cardiovascular Sciences, University of BirminghamBirminghamUnited Kingdom
| | - Abbie Hayes
- Institute of Cardiovascular Sciences, University of BirminghamBirminghamUnited Kingdom
| | - Katie Tompkins
- Institute of Cardiovascular Sciences, University of BirminghamBirminghamUnited Kingdom
| | - Manish Kalla
- Institute of Cardiovascular Sciences, University of BirminghamBirminghamUnited Kingdom
| | - Andrew P. Holmes
- Institute of Cardiovascular Sciences, University of BirminghamBirminghamUnited Kingdom
| | - Christopher O'Shea
- Institute of Cardiovascular Sciences, University of BirminghamBirminghamUnited Kingdom
| | - Davor Pavlovic
- Institute of Cardiovascular Sciences, University of BirminghamBirminghamUnited Kingdom
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Wells SP, Raaijmakers AJ, Curl CL, O’Shea C, Hayes S, Mellor KM, Kalman JM, Kirchhof P, Pavlovic D, Delbridge LM, Bell JR. Localized cardiomyocyte lipid accumulation is associated with slowed epicardial conduction in rats. J Gen Physiol 2023; 155:e202213296. [PMID: 37787979 PMCID: PMC10547601 DOI: 10.1085/jgp.202213296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 05/20/2023] [Accepted: 08/29/2023] [Indexed: 10/04/2023] Open
Abstract
Transmural action potential duration differences and transmural conduction gradients aid the synchronization of left ventricular repolarization, reducing vulnerability to transmural reentry and arrhythmias. A high-fat diet and the associated accumulation of pericardial adipose tissue are linked with conduction slowing and greater arrhythmia vulnerability. It is predicted that cardiac adiposity may more readily influence epicardial conduction (versus endocardial) and disrupt normal transmural activation/repolarization gradients. The aim of this investigation was to determine whether transmural conduction gradients are modified in a rat model of pericardial adiposity. Adult Sprague-Dawley rats were fed control/high-fat diets for 15 wk. Left ventricular 300 µm tangential slices were generated from the endocardium to the epicardium, and conduction was mapped using microelectrode arrays. Slices were then histologically processed to assess fibrosis and cardiomyocyte lipid status. Conduction velocity was significantly greater in epicardial versus endocardial slices in control rats, supporting the concept of a transmural conduction gradient. High-fat diet feeding increased pericardial adiposity and abolished the transmural conduction gradient. Slowed epicardial conduction in epicardial slices strongly correlated with an increase in cardiomyocyte lipid content, but not fibrosis. The positive transmural conduction gradient reported here represents a physiological property of the ventricular activation sequence that likely protects against reentry. The absence of this gradient, secondary to conduction slowing and cardiomyocyte lipid accumulation, specifically in the epicardium, indicates a novel mechanism by which pericardial adiposity may exacerbate ventricular arrhythmias.
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Affiliation(s)
- Simon P. Wells
- Department of Anatomy and Physiology, University of Melbourne, Parkville, Australia
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | | | - Claire L. Curl
- Department of Anatomy and Physiology, University of Melbourne, Parkville, Australia
| | - Christopher O’Shea
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Sarah Hayes
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Bundoora, Australia
| | - Kimberley M. Mellor
- Department of Anatomy and Physiology, University of Melbourne, Parkville, Australia
- Department of Physiology, University of Auckland, Auckland, New Zealand
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Jonathan M. Kalman
- Department of Cardiology, Royal Melbourne Hospital, Melbourne, Australia
- Department of Medicine, University of Melbourne, Melbourne, Australia
| | - Paulus Kirchhof
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
- Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- German Center for Cardiovascular Sciences (DZHK), Partner Site Hamburg-Kiel-Lübeck, Hamburg, Germany
| | - Davor Pavlovic
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Lea M.D. Delbridge
- Department of Anatomy and Physiology, University of Melbourne, Parkville, Australia
| | - James R. Bell
- Department of Anatomy and Physiology, University of Melbourne, Parkville, Australia
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Bundoora, Australia
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3
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Li C, Sun J, Zhang X, Zhou M, Gan X. Implications of MCU complex in metabolic diseases. FASEB J 2023; 37:e23046. [PMID: 37389546 DOI: 10.1096/fj.202300218r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/17/2023] [Accepted: 06/07/2023] [Indexed: 07/01/2023]
Abstract
Metabolic diseases are considered the primary culprit for physical and mental health of individuals. Although the diagnosis of these diseases is relatively easy, more effective and convenient potent drugs are still being explored. Ca2+ across the inner mitochondrial membrane is a vital intracellular messenger that regulates energy metabolism and cellular Ca2+ homeostasis and is involved in cell death. Mitochondria rely on a selective mitochondrial Ca2+ unidirectional transport complex (MCU complex) in their inner membrane for Ca2+ uptake. We found that the channel contains several subunits and undergoes dramatic transformations in various pathological processes, especially in metabolic diseases. In this way, we believe that the MCU complex becomes a target with significant potential for these diseases. However, there is no review linking the two factors, thus hindering the possibility of new drug production. Here, we highlight the connection between MCU complex-related Ca2+ transport and the pathophysiology of metabolic diseases, adding understanding and insight at the molecular level to provide new insights for targeting MCU to reverse metabolism-related diseases.
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Affiliation(s)
- Chen Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Jiyu Sun
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Xidan Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Min Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Xueqi Gan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, School of Chemical Engineering, Sichuan University, Chengdu, China
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Chuaiphichai S, Chu SM, Carnicer R, Kelly M, Bendall JK, Simon JN, Douglas G, Crabtree MJ, Casadei B, Channon KM. Endothelial cell-specific roles for tetrahydrobiopterin in myocardial function, cardiac hypertrophy, and response to myocardial ischemia-reperfusion injury. Am J Physiol Heart Circ Physiol 2023; 324:H430-H442. [PMID: 36735402 PMCID: PMC9988535 DOI: 10.1152/ajpheart.00562.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 12/15/2022] [Accepted: 12/31/2022] [Indexed: 02/04/2023]
Abstract
The cofactor tetrahydrobiopterin (BH4) is a critical regulator of nitric oxide synthase (NOS) function and redox signaling, with reduced BH4 implicated in multiple cardiovascular disease states. In the myocardium, augmentation of BH4 levels can impact on cardiomyocyte function, preventing hypertrophy and heart failure. However, the specific role of endothelial cell BH4 biosynthesis in the coronary circulation and its role in cardiac function and the response to ischemia has yet to be elucidated. Endothelial cell-specific Gch1 knockout mice were generated by crossing Gch1fl/fl with Tie2cre mice, generating Gch1fl/flTie2cre mice and littermate controls. GTP cyclohydrolase protein and BH4 levels were reduced in heart tissues from Gch1fl/flTie2cre mice, localized to endothelial cells, with normal cardiomyocyte BH4. Deficiency in coronary endothelial cell BH4 led to NOS uncoupling, decreased NO bioactivity, and increased superoxide and hydrogen peroxide productions in the hearts of Gch1fl/flTie2cre mice. Under physiological conditions, loss of endothelial cell-specific BH4 led to mild cardiac hypertrophy in Gch1fl/flTie2cre hearts. Endothelial cell BH4 loss was also associated with increased neuronal NOS protein, loss of endothelial NOS protein, and increased phospholamban phosphorylation at serine-17 in cardiomyocytes. Loss of cardiac endothelial cell BH4 led to coronary vascular dysfunction, reduced functional recovery, and increased myocardial infarct size following ischemia-reperfusion injury. Taken together, these studies reveal a specific role for endothelial cell Gch1/BH4 biosynthesis in cardiac function and the response to cardiac ischemia-reperfusion injury. Targeting endothelial cell Gch1 and BH4 biosynthesis may provide a novel therapeutic target for the prevention and treatment of cardiac dysfunction and ischemia-reperfusion injury.NEW & NOTEWORTHY We demonstrate a critical role for endothelial cell Gch1/BH4 biosynthesis in coronary vascular function and cardiac function. Loss of cardiac endothelial cell BH4 leads to coronary vascular dysfunction, reduced functional recovery, and increased myocardial infarct size following ischemia/reperfusion injury. Targeting endothelial cell Gch1 and BH4 biosynthesis may provide a novel therapeutic target for the prevention and treatment of cardiac dysfunction, ischemia injury, and heart failure.
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Affiliation(s)
- Surawee Chuaiphichai
- Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Sandy M Chu
- Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Ricardo Carnicer
- Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Matthew Kelly
- Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Jenifer K Bendall
- Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Jillian N Simon
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States
| | - Gillian Douglas
- Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Mark J Crabtree
- Department of Biochemical Sciences, School of Bioscience and Medicine, University of Surrey, Guildford, United Kingdom
| | - Barbara Casadei
- Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Keith M Channon
- Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
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Regular Exercise in Drosophila Prevents Age-Related Cardiac Dysfunction Caused by High Fat and Heart-Specific Knockdown of skd. Int J Mol Sci 2023; 24:ijms24021216. [PMID: 36674733 PMCID: PMC9865808 DOI: 10.3390/ijms24021216] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 01/01/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Skuld (skd) is a subunit of the Mediator complex subunit complex. In the heart, skd controls systemic obesity, is involved in systemic energy metabolism, and is closely linked to cardiac function and aging. However, it is unclear whether the effect of cardiac skd on cardiac energy metabolism affects cardiac function. We found that cardiac-specific knockdown of skd showed impaired cardiac function, metabolic impairment, and premature aging. Drosophila was subjected to an exercise and high-fat diet (HFD) intervention to explore the effects of exercise on cardiac skd expression and cardiac function in HFD Drosophila. We found that Hand-Gal4>skd RNAi (KC) Drosophila had impaired cardiac function, metabolic impairment, and premature aging. Regular exercise significantly improved cardiac function and metabolism and delayed aging in HFD KC Drosophila. Thus, our study found that the effect of skd on cardiac energy metabolism in the heart affected cardiac function. Exercise may counteract age-related cardiac dysfunction and metabolic disturbances caused by HFD and heart-specific knockdown of skd. Skd may be a potential therapeutic target for heart disease.
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Sun L, Yuan JL, Chen QC, Xiao WK, Ma GP, Liang JH, Chen XK, Wang S, Zhou XX, Wu H, Hong CX. Red meat consumption and risk for dyslipidaemia and inflammation: A systematic review and meta-analysis. Front Cardiovasc Med 2022; 9:996467. [PMID: 36247460 PMCID: PMC9563242 DOI: 10.3389/fcvm.2022.996467] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 09/14/2022] [Indexed: 11/17/2022] Open
Abstract
Aim The study (PROSPERO: CRD42021240905) aims to reveal the relationships among red meat, serum lipids and inflammatory biomarkers. Methods and results PubMed, EMBASE and the Cochrane databases were explored through December 2021 to identify 574 studies about red meat and serum lipids markers including total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), C-reactive protein (CRP) or hypersensitive-CRP (hs-CRP). Finally, 20 randomized controlled trials (RCTs) involving 1001 people were included, red meat and serum lipid markers and their relevant information was extracted. The pooled standard mean difference (SMD) was obtained by applying a random-effects model, and subgroup analyses and meta-regression were employed to explain the heterogeneity. Compared with white meat or grain diets, the gross results showed that the consumption of red meat increased serum lipid concentrations like TG (0.29 mmol/L, 95% CI 0.14, 0.44,P<0.001), but did not significantly influence the TC (0.13 mmol/L, 95% CI −0.07, 0.33, P = 0.21), LDL-C (0.11 mmol/L, 95% CI −0.23, 0.45, P = 0.53), HDL-C (−0.07 mmol/L, 95% CI −0.31, 0.17, P = 0.57),CRP or hs-CRP (0.13 mmol/L, 95% CI −0.10, 0.37,P = 0.273). Conclusion Our study provided evidence to the fact that red meat consumption affected serum lipids levels like TG, but almost had no effect on TC, LDL-C, HDL-C and CRP or hs-CRP. Such diets with red meat should be taken seriously to avoid the problem of high lipid profiles. Systematic review registration [https://www.crd.york.ac.uk/PROSPERO], identifier [CRD42021240905].
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Affiliation(s)
- Le Sun
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jia-Lin Yuan
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qiu-Cen Chen
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wen-Kang Xiao
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Gui-Ping Ma
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jia-Hua Liang
- The Department of Cardiovascular Disease, Meizhou Hospital of Traditional Chinese Medicine, Meizhou, China
| | - Xiao-Kun Chen
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Song Wang
- The Department of Cardiovascular Disease, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiao-Xiong Zhou
- The Department of Cardiovascular Disease, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hui Wu
- The Department of Cardiovascular Disease, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- *Correspondence: Hui Wu,
| | - Chuang-Xiong Hong
- The Department of Cardiovascular Disease, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- Chuang-Xiong Hong,
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Manolis AS, Manolis TA, Manolis AA, Melita H. Diet and Sudden Death: How to Reduce the Risk. Curr Vasc Pharmacol 2022; 20:383-408. [PMID: 35726434 DOI: 10.2174/1570161120666220621090343] [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: 04/06/2022] [Revised: 05/13/2022] [Accepted: 05/20/2022] [Indexed: 01/25/2023]
Abstract
In addition to the association of dietary patterns, specific foods and nutrients with several diseases, including cardiovascular disease and mortality, there is also strong emerging evidence of an association of dietary patterns with the risk of sudden cardiac death (SCD). In this comprehensive review, data are presented and analyzed about foods and diets that mitigate the risk of ventricular arrhythmias (VAs) and SCD, but also about arrhythmogenic nutritional elements and patterns that seem to enhance or facilitate potentially malignant VAs and SCD. The antiarrhythmic or protective group comprises fish, nuts and other foods enriched in omega-3 polyunsaturated fatty acids, the Mediterranean and other healthy diets, vitamins E, A and D and certain minerals (magnesium, potassium, selenium). The arrhythmogenic-food group includes saturated fat, trans fats, ketogenic and liquid protein diets, the Southern and other unhealthy diets, energy drinks and excessive caffeine intake, as well as heavy alcohol drinking. Relevant antiarrhythmic mechanisms include modification of cell membrane structure by n-3 polyunsaturated fatty acids, their direct effect on calcium channels and cardiomyocytes and their important role in eicosanoid metabolism, enhancing myocyte electric stability, reducing vulnerability to VAs, lowering heart rate, and improving heart rate variability, each of which is a risk factor for SCD. Contrarily, saturated fat causes calcium handling abnormalities and calcium overload in cardiomyocytes, while a high-fat diet causes mitochondrial dysfunction that dysregulates a variety of ion channels promoting VAs and SCD. Free fatty acids have been considered proarrhythmic and implicated in facilitating SCD; thus, diets increasing free fatty acids, e.g., ketogenic diets, should be discouraged and replaced with diets enriched with polyunsaturated fatty acids, which can also reduce free fatty acids. All available relevant data on this important topic are herein reviewed, large studies and meta-analyses and pertinent advisories are tabulated, while protective (antiarrhythmic) and arrhythmogenic specific diet constituents are pictorially illustrated.
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Affiliation(s)
- Antonis S Manolis
- First Department of Cardiology, Athens University School of Medicine, Athens, Greece
| | | | | | - Helen Melita
- Central Laboratories, Onassis Cardiac Surgery Center, Athens, Greece
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Najjar RS, Knapp D, Wanders D, Feresin RG. Raspberry and blackberry act in a synergistic manner to improve cardiac redox proteins and reduce NF-κB and SAPK/JNK in mice fed a high-fat, high-sucrose diet. Nutr Metab Cardiovasc Dis 2022; 32:1784-1796. [PMID: 35487829 DOI: 10.1016/j.numecd.2022.03.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Increased cardiac inflammation and oxidative stress are common features in obesity, and toll-like receptor (TLR)4 signaling is a key inflammatory pathway in this deleterious process. This study aimed to investigate whether berries could attenuate the detrimental effects of a high-fat, high-sucrose (HFHS) diet on the myocardium at the molecular level. METHODS AND RESULTS Eight-week-old male C57BL/6 mice consumed a low-fat, low-sucrose (LFLS) diet alone or supplemented with 10% blackberry (BL), 10% raspberry (RB) or 10% blackberry + raspberry (BL + RB) for four weeks. Animals were then switched to a HFHS diet for 24 weeks with or without berry supplementation or maintained on a LFLS control diet without berry supplementation. Left ventricles of the heart were isolated for protein and mRNA analysis. Berry consumption, particularly BL + RB reduced NADPH-oxidase (NOX)1 and NOX2 and increased catalase (CAT) and superoxide dismutase (SOD)2, expression while BL and RB supplementation alone was less efficacious. Downstream TLR4 signaling was attenuated mostly by both RB and BL + RB supplementation, while NF-κB pathway was attenuated by BL + RB supplementation. Stress-activated protein kinase (SAPK)/Jun amino-terminal kinase (JNK) was also attenuated by BL + RB supplementation, and reduced TNF-α transcription and protein expression was observed only with BL + RB supplementation. CONCLUSION The synergistic effects of BL + RB may reduce obesity-induced cardiac inflammation and oxidative stress to a greater extent than BL or RB alone.
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Affiliation(s)
- Rami S Najjar
- Department of Nutrition, Georgia State University, Atlanta, GA, USA
| | - Denise Knapp
- Department of Nutrition, Georgia State University, Atlanta, GA, USA; Department of Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA, USA
| | - Desiree Wanders
- Department of Nutrition, Georgia State University, Atlanta, GA, USA
| | - Rafaela G Feresin
- Department of Nutrition, Georgia State University, Atlanta, GA, USA.
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Joseph LC, Shi J, Nguyen QN, Pensiero V, Goulbourne C, Bauer RC, Zhang H, Morrow JP. Combined metabolomic and transcriptomic profiling approaches reveal the cardiac response to high-fat diet. iScience 2022; 25:104184. [PMID: 35494220 PMCID: PMC9038541 DOI: 10.1016/j.isci.2022.104184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/04/2022] [Accepted: 03/29/2022] [Indexed: 12/24/2022] Open
Abstract
The response of vital organs to different types of nutrition or diet is a fundamental question in physiology. We examined the cardiac response to 4 weeks of high-fat diet in mice, measuring cardiac metabolites and mRNA. Metabolomics showed dramatic differences after a high-fat diet, including increases in several acyl-carnitine species. The RNA-seq data showed changes consistent with adaptations to use more fatty acid as substrate and an increase in the antioxidant protein catalase. Changes in mRNA were correlated with changes in protein level for several highly responsive genes. We also found significant sex differences in both metabolomics and RNA-seq datasets, both at baseline and after high fat diet. This work reveals the response of a vital organ to dietary intervention at both metabolomic and transcriptomic levels, which is a fundamental question in physiology. This work also reveals significant sex differences in cardiac metabolites and gene expression.
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Affiliation(s)
- Leroy C. Joseph
- Department of Medicine, College of Physicians and Surgeons of Columbia University, 650 W 168 Street, New York, NY 10032, USA
| | - Jianting Shi
- Department of Medicine, College of Physicians and Surgeons of Columbia University, 650 W 168 Street, New York, NY 10032, USA
- Cardiometabolic Genomics Program, Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY 10032, USA
| | - Quynh N. Nguyen
- Department of Medicine, College of Physicians and Surgeons of Columbia University, 650 W 168 Street, New York, NY 10032, USA
| | - Victoria Pensiero
- Department of Medicine, College of Physicians and Surgeons of Columbia University, 650 W 168 Street, New York, NY 10032, USA
| | - Chris Goulbourne
- Center for Dementia Research, Nathan S. Kline Institute, Orangeburg, NY, USA
| | - Robert C. Bauer
- Department of Medicine, College of Physicians and Surgeons of Columbia University, 650 W 168 Street, New York, NY 10032, USA
| | - Hanrui Zhang
- Department of Medicine, College of Physicians and Surgeons of Columbia University, 650 W 168 Street, New York, NY 10032, USA
- Cardiometabolic Genomics Program, Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY 10032, USA
| | - John P. Morrow
- Department of Medicine, College of Physicians and Surgeons of Columbia University, 650 W 168 Street, New York, NY 10032, USA
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Hansen SS, Pedersen TM, Marin J, Boardman NT, Shah AM, Aasum E, Hafstad AD. Overexpression of NOX2 Exacerbates AngII-Mediated Cardiac Dysfunction and Metabolic Remodelling. Antioxidants (Basel) 2022; 11:antiox11010143. [PMID: 35052647 PMCID: PMC8772838 DOI: 10.3390/antiox11010143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/01/2022] [Accepted: 01/05/2022] [Indexed: 11/16/2022] Open
Abstract
The present study aimed to examine the effects of low doses of angiotensin II (AngII) on cardiac function, myocardial substrate utilization, energetics, and mitochondrial function in C57Bl/6J mice and in a transgenic mouse model with cardiomyocyte specific upregulation of NOX2 (csNOX2 TG). Mice were treated with saline (sham), 50 or 400 ng/kg/min of AngII (AngII50 and AngII400) for two weeks. In vivo blood pressure and cardiac function were measured using plethysmography and echocardiography, respectively. Ex vivo cardiac function, mechanical efficiency, and myocardial substrate utilization were assessed in isolated perfused working hearts, and mitochondrial function was measured in left ventricular homogenates. AngII50 caused reduced mechanical efficiency despite having no effect on cardiac hypertrophy, function, or substrate utilization. AngII400 slightly increased systemic blood pressure and induced cardiac hypertrophy with no effect on cardiac function, efficiency, or substrate utilization. In csNOX2 TG mice, AngII400 induced cardiac hypertrophy and in vivo cardiac dysfunction. This was associated with a switch towards increased myocardial glucose oxidation and impaired mitochondrial oxygen consumption rates. Low doses of AngII may transiently impair cardiac efficiency, preceding the development of hypertrophy induced at higher doses. NOX2 overexpression exacerbates the AngII -induced pathology, with cardiac dysfunction and myocardial metabolic remodelling.
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Affiliation(s)
- Synne S. Hansen
- Cardiovascular Research Group, Department of Medical Biology, Faculty of Health Science, UiT—The Arctic University of Norway, 9019 Tromsø, Norway; (T.M.P.); (J.M.); (N.T.B.); (E.A.); (A.D.H.)
- Correspondence:
| | - Tina M. Pedersen
- Cardiovascular Research Group, Department of Medical Biology, Faculty of Health Science, UiT—The Arctic University of Norway, 9019 Tromsø, Norway; (T.M.P.); (J.M.); (N.T.B.); (E.A.); (A.D.H.)
| | - Julie Marin
- Cardiovascular Research Group, Department of Medical Biology, Faculty of Health Science, UiT—The Arctic University of Norway, 9019 Tromsø, Norway; (T.M.P.); (J.M.); (N.T.B.); (E.A.); (A.D.H.)
| | - Neoma T. Boardman
- Cardiovascular Research Group, Department of Medical Biology, Faculty of Health Science, UiT—The Arctic University of Norway, 9019 Tromsø, Norway; (T.M.P.); (J.M.); (N.T.B.); (E.A.); (A.D.H.)
| | - Ajay M. Shah
- School of Cardiovascular Medicine & Sciences, King’s College London, British Heart Foundation Centre of Excellence, London SE5 9NU, UK;
| | - Ellen Aasum
- Cardiovascular Research Group, Department of Medical Biology, Faculty of Health Science, UiT—The Arctic University of Norway, 9019 Tromsø, Norway; (T.M.P.); (J.M.); (N.T.B.); (E.A.); (A.D.H.)
| | - Anne D. Hafstad
- Cardiovascular Research Group, Department of Medical Biology, Faculty of Health Science, UiT—The Arctic University of Norway, 9019 Tromsø, Norway; (T.M.P.); (J.M.); (N.T.B.); (E.A.); (A.D.H.)
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11
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Zheng X, Liu G, Huang R. Identification and Verification of Feature Immune-Related Genes in Patients With Hypertrophic Cardiomyopathy Based on Bioinformatics Analyses. Front Cardiovasc Med 2021; 8:752559. [PMID: 34765659 PMCID: PMC8577723 DOI: 10.3389/fcvm.2021.752559] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 09/28/2021] [Indexed: 12/27/2022] Open
Abstract
Objective: To identify feature immune-related genes (IRGs) in patients with hypertrophic cardiomyopathy (HCM) and verify their ability to diagnose HCM. Methods: The GSE160997 dataset on cardiac tissue from 18 HCM patients and 5 controls was downloaded from the Gene Expression Omnibus database. A false discovery rate <0.05 and |log2 fold change| >1 were the filters applied to identify the differentially expressed genes (DEGs). The differentially expressed IRGs were the intersection results between the DEGs and an IRG dataset from the IMMPORT database. The protein-protein interaction network of differentially expressed IRGs was constructed, and the top 20 hub genes with the most adjacent nodes in the network were selected. The least absolute shrinkage and selection operator regression algorithm and a random forest algorithm were used to identify the feature IRGs as biomarkers that were then verified against GSE36961. Results: A total of 1079 DEGs were identified in GSE160997. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses indicated that immune-related mechanisms play an important role in the pathogenesis of HCM. A total of 121 differentially expressed IRGs were identified, and 5 feature IRGs were selected, 4 of which were confirmed as potential biomarkers of HCM by external verification with excellent discrimination ability. A diagnosis model of HCM based on the four feature IRGs was developed and visualized as a nomogram with a C-index of 0.925 (95% confidence interval 0.869–0.981). Conclusion: Our study identified four feature IRGs as biomarkers for the diagnosis of HCM, offering an innovative perspective of the underlying immune-related pathological molecular mechanisms.
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Affiliation(s)
- Xifeng Zheng
- Department of Geriatrics, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Guangyan Liu
- Department of Geriatrics, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Ruina Huang
- Department of Cardiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
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12
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Joseph LC, Reyes MV, Homan EA, Gowen B, Avula UMR, Goulbourne CN, Wan EY, Elrod JW, Morrow JP. The mitochondrial calcium uniporter promotes arrhythmias caused by high-fat diet. Sci Rep 2021; 11:17808. [PMID: 34497331 PMCID: PMC8426388 DOI: 10.1038/s41598-021-97449-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 08/13/2021] [Indexed: 12/16/2022] Open
Abstract
Obesity and diabetes increase the risk of arrhythmia and sudden cardiac death. However, the molecular mechanisms of arrhythmia caused by metabolic abnormalities are not well understood. We hypothesized that mitochondrial dysfunction caused by high fat diet (HFD) promotes ventricular arrhythmia. Based on our previous work showing that saturated fat causes calcium handling abnormalities in cardiomyocytes, we hypothesized that mitochondrial calcium uptake contributes to HFD-induced mitochondrial dysfunction and arrhythmic events. For experiments, we used mice with conditional cardiac-specific deletion of the mitochondrial calcium uniporter (Mcu), which is required for mitochondrial calcium uptake, and littermate controls. Mice were used for in vivo heart rhythm monitoring, perfused heart experiments, and isolated cardiomyocyte experiments. MCU KO mice are protected from HFD-induced long QT, inducible ventricular tachycardia, and abnormal ventricular repolarization. Abnormal repolarization may be due, at least in part, to a reduction in protein levels of voltage gated potassium channels. Furthermore, isolated cardiomyocytes from MCU KO mice exposed to saturated fat are protected from increased reactive oxygen species (ROS), mitochondrial dysfunction, and abnormal calcium handling. Activation of calmodulin-dependent protein kinase (CaMKII) corresponds with the increase in arrhythmias in vivo. Additional experiments showed that CaMKII inhibition protects cardiomyocytes from the mitochondrial dysfunction caused by saturated fat. Hearts from transgenic CaMKII inhibitor mice were protected from inducible ventricular tachycardia after HFD. These studies identify mitochondrial dysfunction caused by calcium overload as a key mechanism of arrhythmia during HFD. This work indicates that MCU and CaMKII could be therapeutic targets for arrhythmia caused by metabolic abnormalities.
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Affiliation(s)
- Leroy C Joseph
- Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY, 10032, USA
| | - Michael V Reyes
- Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY, 10032, USA
| | - Edwin A Homan
- Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY, 10032, USA
| | - Blake Gowen
- Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY, 10032, USA
| | - Uma Mahesh R Avula
- Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY, 10032, USA
- Division of Nephrology, Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA
| | - Chris N Goulbourne
- Center for Dementia Research, Nathan S. Kline Institute, Orangeburg, NY, USA
| | - Elaine Y Wan
- Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY, 10032, USA
| | - John W Elrod
- Lewis Katz School of Medicine at Temple University, 3500 N Broad St, MERB 949, Philadelphia, PA, USA
| | - John P Morrow
- Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, NY, 10032, USA.
- College of Physicians and Surgeons of Columbia University, PH10-203, 650 W 168th Street, New York, NY, 10032, USA.
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13
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Xie D, Wu J, Wu Q, Zhang X, Zhou D, Dai W, Zhu M, Wang D. Integrating proteomic, lipidomic and metabolomic data to construct a global metabolic network of lethal ventricular tachyarrhythmias (LVTA) induced by aconitine. J Proteomics 2021; 232:104043. [PMID: 33161167 DOI: 10.1016/j.jprot.2020.104043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/10/2020] [Accepted: 11/02/2020] [Indexed: 02/05/2023]
Abstract
Lethal ventricular tachyarrhythmias (LVTA)-related sudden cardiac death (SCD) is one of the major causes of death worldwide. However, the mechanisms underlying LVTA induced by myocardial ion channel diseases (MICDs) are not yet fully understood. Here, we produced an LVTA rat model induced by aconitine, to mimic MICDs-elicited LVTA, and constructed a global pathway network via integrating proteomic and lipidomic data, and our previously published metabolomic data. Results showed that both proteome and lipidome were disturbed during the LVTA process. Most of the differentially expressed proteins and lipid species were correlated. Proteomic data indicated disturbance of energy metabolism (e.g. fatty acid β-oxidation and the tricarboxylic acid cycle) and activation of the protein kinase C and nicotinamide adenine dinucleotide phosphate (NAPDH) oxidase pathway; these alterations led to lowered ATP and elevated ROS, respectively. Altered levels of the Ca2+ handling proteins suggested aberrant intracellular Ca2+ homeostasis, which might also be secondary to the shortage of ATP and oxidative stress. Significantly, the disrupted pathways implied by proteomic data were largely confirmed by lipidomic and metabolomic data. Collectively, we have constructed a metabolic pathway network of aconitine-induced LVTA using a multi-omics strategy, which confers great promise for the deeper interpretation of the mechanisms underlying LVTA. SIGNIFICANCE: In this study, we integrated proteomics, lipidomics and metabolomics to explore the pathophysiological processes of LVTA induced by aconitine. It is innovative to try to integrate these three omics in a study exploring the relative mechanisms. Here, based on the DEPs and differentially abundant lipid species (DALPs) between the LVTA groups and the controls, and the different metabolites discovered previously from the same model, we have successfully constructed a global metabolic network. Taken together, the multi-omics integration strategies used in this study show the potential for a new interpretation of the pathophysiological processes of LVTA induced by different conditions and open the possibility to explore deeper and broader mechanisms of other diseases.
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Affiliation(s)
- Dezhi Xie
- Department of Forensic Medicine, Shantou University Medical College, Shantou 515041, China
| | - Jiayan Wu
- Department of Forensic Medicine, Shantou University Medical College, Shantou 515041, China
| | - Qian Wu
- Shanghai Center for Bioinformation Technology, Shanghai 201203, China
| | - Xiaojun Zhang
- Central laboratory, Shantou University Medical College, Shantou 515041, China
| | - Danya Zhou
- Department of Forensic Medicine, Shantou University Medical College, Shantou 515041, China
| | - Wentao Dai
- Shanghai Center for Bioinformation Technology, Shanghai 201203, China
| | - Mengting Zhu
- Department of Forensic Medicine, Shantou University Medical College, Shantou 515041, China
| | - Dian Wang
- Department of Forensic Medicine, Shantou University Medical College, Shantou 515041, China.
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14
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Ostropolets A, Elias PA, Reyes MV, Wan EY, Pajvani UB, Hripcsak G, Morrow JP. Metformin Is Associated With a Lower Risk of Atrial Fibrillation and Ventricular Arrhythmias Compared With Sulfonylureas: An Observational Study. Circ Arrhythm Electrophysiol 2021; 14:e009115. [PMID: 33554609 DOI: 10.1161/circep.120.009115] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
[Figure: see text].
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MESH Headings
- Administration, Oral
- Atrial Fibrillation/diagnosis
- Atrial Fibrillation/etiology
- Atrial Fibrillation/physiopathology
- Atrial Fibrillation/prevention & control
- Databases, Factual
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/diagnosis
- Diabetes Mellitus, Type 2/drug therapy
- Drug Therapy, Combination
- Humans
- Hypoglycemic Agents/administration & dosage
- Metformin/administration & dosage
- Retrospective Studies
- Risk Assessment
- Risk Factors
- Sulfonylurea Compounds/administration & dosage
- Tachycardia, Ventricular/diagnosis
- Tachycardia, Ventricular/etiology
- Tachycardia, Ventricular/physiopathology
- Tachycardia, Ventricular/prevention & control
- Time Factors
- Treatment Outcome
- Ventricular Fibrillation/diagnosis
- Ventricular Fibrillation/etiology
- Ventricular Fibrillation/physiopathology
- Ventricular Fibrillation/prevention & control
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Affiliation(s)
- Anna Ostropolets
- Department of Biomedical Informatics (A.O., G.H.), College of Physicians and Surgeons of Columbia University, NY
| | - Pierre A Elias
- Department of Medicine (P.A.E., M.V.R., E.Y.W., U.B.P., G.H., J.P.M.), College of Physicians and Surgeons of Columbia University, NY
| | - Michael V Reyes
- Department of Medicine (P.A.E., M.V.R., E.Y.W., U.B.P., G.H., J.P.M.), College of Physicians and Surgeons of Columbia University, NY
| | - Elain Y Wan
- Department of Medicine (P.A.E., M.V.R., E.Y.W., U.B.P., G.H., J.P.M.), College of Physicians and Surgeons of Columbia University, NY
| | - Utpal B Pajvani
- Department of Medicine (P.A.E., M.V.R., E.Y.W., U.B.P., G.H., J.P.M.), College of Physicians and Surgeons of Columbia University, NY
| | - George Hripcsak
- Department of Biomedical Informatics (A.O., G.H.), College of Physicians and Surgeons of Columbia University, NY
- Department of Medicine (P.A.E., M.V.R., E.Y.W., U.B.P., G.H., J.P.M.), College of Physicians and Surgeons of Columbia University, NY
| | - John P Morrow
- Department of Medicine (P.A.E., M.V.R., E.Y.W., U.B.P., G.H., J.P.M.), College of Physicians and Surgeons of Columbia University, NY
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15
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Dewal RS, Greer-Short A, Lane C, Nirengi S, Manzano PA, Hernández-Saavedra D, Wright KR, Nassal D, Baer LA, Mohler PJ, Hund TJ, Stanford KI. Phospho-ablation of cardiac sodium channel Na v1.5 mitigates susceptibility to atrial fibrillation and improves glucose homeostasis under conditions of diet-induced obesity. Int J Obes (Lond) 2021; 45:795-807. [PMID: 33500550 PMCID: PMC8005377 DOI: 10.1038/s41366-021-00742-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 11/19/2020] [Accepted: 01/04/2021] [Indexed: 01/30/2023]
Abstract
BACKGROUND Atrial fibrillation (AF) is the most common sustained arrhythmia, with growing evidence identifying obesity as an important risk factor for the development of AF. Although defective atrial myocyte excitability due to stress-induced remodeling of ion channels is commonly observed in the setting of AF, little is known about the mechanistic link between obesity and AF. Recent studies have identified increased cardiac late sodium current (INa,L) downstream of calmodulin-dependent kinase II (CaMKII) activation as an important driver of AF susceptibility. METHODS Here, we investigated a possible role for CaMKII-dependent INa,L in obesity-induced AF using wild-type (WT) and whole-body knock-in mice that ablates phosphorylation of the Nav1.5 sodium channel and prevents augmentation of the late sodium current (S571A; SA mice). RESULTS A high-fat diet (HFD) increased susceptibility to arrhythmias in WT mice, while SA mice were protected from this effect. Unexpectedly, SA mice had improved glucose homeostasis and decreased body weight compared to WT mice. However, SA mice also had reduced food consumption compared to WT mice. Controlling for food consumption through pair feeding of WT and SA mice abrogated differences in weight gain and AF inducibility, but not atrial fibrosis, premature atrial contractions or metabolic capacity. CONCLUSIONS These data demonstrate a novel role for CaMKII-dependent regulation of Nav1.5 in mediating susceptibility to arrhythmias and whole-body metabolism under conditions of diet-induced obesity.
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Affiliation(s)
- Revati S. Dewal
- grid.412332.50000 0001 1545 0811Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Center for Diabetes and Metabolism Research Center, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Amara Greer-Short
- grid.261331.40000 0001 2285 7943Department of Biomedical Engineering, The Ohio State University, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Cemantha Lane
- grid.261331.40000 0001 2285 7943Department of Biomedical Engineering, The Ohio State University, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Shinsuke Nirengi
- grid.412332.50000 0001 1545 0811Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Center for Diabetes and Metabolism Research Center, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Pedro Acosta Manzano
- grid.412332.50000 0001 1545 0811Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Center for Diabetes and Metabolism Research Center, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Diego Hernández-Saavedra
- grid.412332.50000 0001 1545 0811Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Center for Diabetes and Metabolism Research Center, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Katherine R. Wright
- grid.412332.50000 0001 1545 0811Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Center for Diabetes and Metabolism Research Center, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Drew Nassal
- grid.261331.40000 0001 2285 7943Department of Biomedical Engineering, The Ohio State University, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Lisa A. Baer
- grid.412332.50000 0001 1545 0811Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Center for Diabetes and Metabolism Research Center, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Peter J. Mohler
- grid.412332.50000 0001 1545 0811Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Thomas J. Hund
- grid.261331.40000 0001 2285 7943Department of Biomedical Engineering, The Ohio State University, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Kristin I. Stanford
- grid.412332.50000 0001 1545 0811Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Center for Diabetes and Metabolism Research Center, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH USA
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16
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Gowen BH, Reyes MV, Joseph LC, Morrow JP. Mechanisms of Chronic Metabolic Stress in Arrhythmias. Antioxidants (Basel) 2020; 9:antiox9101012. [PMID: 33086602 PMCID: PMC7603089 DOI: 10.3390/antiox9101012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/07/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023] Open
Abstract
Cardiac arrhythmias are responsible for many cardiovascular disease-related deaths worldwide. While arrhythmia pathogenesis is complex, there is increasing evidence for metabolic causes. Obesity, diabetes, and chronically consuming high-fat foods significantly increase the likelihood of developing arrhythmias. Although these correlations are well established, mechanistic explanations connecting a high-fat diet (HFD) to arrhythmogenesis are incomplete, although oxidative stress appears to be critical. This review investigates the metabolic changes that occur in obesity and after HFD. Potential therapies to prevent or treat arrhythmias are discussed, including antioxidants.
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Affiliation(s)
| | | | | | - John P. Morrow
- Correspondence: ; Tel.: +1-212-305-5553; Fax: +1-212-305-4648
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17
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Greenwell AA, Gopal K, Ussher JR. Myocardial Energy Metabolism in Non-ischemic Cardiomyopathy. Front Physiol 2020; 11:570421. [PMID: 33041869 PMCID: PMC7526697 DOI: 10.3389/fphys.2020.570421] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 08/26/2020] [Indexed: 12/12/2022] Open
Abstract
As the most metabolically demanding organ in the body, the heart must generate massive amounts of energy adenosine triphosphate (ATP) from the oxidation of fatty acids, carbohydrates and other fuels (e.g., amino acids, ketone bodies), in order to sustain constant contractile function. While the healthy mature heart acts omnivorously and is highly flexible in its ability to utilize the numerous fuel sources delivered to it through its coronary circulation, the heart’s ability to produce ATP from these fuel sources becomes perturbed in numerous cardiovascular disorders. This includes ischemic heart disease and myocardial infarction, as well as in various cardiomyopathies that often precede the development of overt heart failure. We herein will provide an overview of myocardial energy metabolism in the healthy heart, while describing the numerous perturbations that take place in various non-ischemic cardiomyopathies such as hypertrophic cardiomyopathy, diabetic cardiomyopathy, arrhythmogenic cardiomyopathy, and the cardiomyopathy associated with the rare genetic disease, Barth Syndrome. Based on preclinical evidence where optimizing myocardial energy metabolism has been shown to attenuate cardiac dysfunction, we will discuss the feasibility of myocardial energetics optimization as an approach to treat the cardiac pathology associated with these various non-ischemic cardiomyopathies.
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Affiliation(s)
- Amanda A Greenwell
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada.,Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, AB, Canada
| | - Keshav Gopal
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada.,Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, AB, Canada
| | - John R Ussher
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada.,Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada.,Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, AB, Canada
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18
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McCauley MD, Hong L, Sridhar A, Menon A, Perike S, Zhang M, da Silva IB, Yan J, Bonini MG, Ai X, Rehman J, Darbar D. Ion Channel and Structural Remodeling in Obesity-Mediated Atrial Fibrillation. Circ Arrhythm Electrophysiol 2020; 13:e008296. [PMID: 32654503 PMCID: PMC7935016 DOI: 10.1161/circep.120.008296] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Epidemiological studies have established obesity as an independent risk factor for atrial fibrillation (AF), but the underlying pathophysiological mechanisms remain unclear. Reduced cardiac sodium channel expression is a known causal mechanism in AF. We hypothesized that obesity decreases Nav1.5 expression via enhanced oxidative stress, thus reducing INa, and enhancing susceptibility to AF. METHODS To elucidate the underlying electrophysiological mechanisms a diet-induced obese mouse model was used. Weight, blood pressure, glucose, F2-isoprostanes, NOX2 (NADPH oxidase 2), and PKC (protein kinase C) were measured in obese mice and compared with lean controls. Invasive electrophysiological, immunohistochemistry, Western blotting, and patch clamping of membrane potentials was performed to evaluate the molecular and electrophysiological phenotype of atrial myocytes. RESULTS Pacing-induced AF in 100% of diet-induced obese mice versus 25% in controls (P<0.01) with increased AF burden. Cardiac sodium channel expression, INa and atrial action potential duration were reduced and potassium channel expression (Kv1.5) and current (IKur) and F2-isoprostanes, NOX2, and PKC-α/δ expression and atrial fibrosis were significantly increased in diet-induced obese mice as compared with controls. A mitochondrial antioxidant reduced AF burden, restored INa, ICa,L, IKur, action potential duration, and reversed atrial fibrosis in diet-induced obese mice as compared with controls. CONCLUSIONS Inducible AF in obese mice is mediated, in part, by a combined effect of sodium, potassium, and calcium channel remodeling and atrial fibrosis. Mitochondrial antioxidant therapy abrogated the ion channel and structural remodeling and reversed the obesity-induced AF burden. Our findings have important implications for the management of obesity-mediated AF in patients. Graphic Abstract: A graphic abstract is available for this article.
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Affiliation(s)
- Mark D. McCauley
- Department of Medicine, Rush University Medical Center
- Jesse Brown VA Medical Center, Rush University Medical Center
| | - Liang Hong
- Department of Medicine, Rush University Medical Center
| | | | - Ambili Menon
- Department of Medicine, Rush University Medical Center
| | | | - Meihong Zhang
- Department of Medicine, Rush University Medical Center
| | | | - JiaJie Yan
- Department of Physiology and Biophysics, Rush University Medical Center
| | | | - Xun Ai
- Department of Physiology and Biophysics, Rush University Medical Center
| | - Jalees Rehman
- Department of Medicine, Rush University Medical Center
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL
| | - Dawood Darbar
- Department of Medicine, Rush University Medical Center
- Jesse Brown VA Medical Center, Rush University Medical Center
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL
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19
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Abstract
PURPOSE OF REVIEW This review is an assessment of the state of the science on nutrition disparities and their contribution to disparities in cardiovascular health. RECENT FINDINGS Nutrition disparities remain pervasive by race/ethnicity, sex/gender, socioeconomic status, and geography. They are rooted in differences in social, cultural, and environmental determinants of health, behavioral and lifestyle factors, and the impact of policy interventions. Systematic differences in diet quality, dietary patterns, and nutrient intakes contribute to cardiovascular disparities and are mediated by microbiota, and CVD risk factors including high levels of blood pressure, low density lipoprotein cholesterol (LDL), and glucose; oxidative stress, pro-inflammatory cytokines, and endothelial dysfunction. Despite the progress made in nutrition research, important gaps persist that signal the need for more effective interventions at multiple levels to reduce cardiovascular disparities. Research opportunities include (1) exploring the gene-nutrient-environment interactions in the context of ancestral diversity; (2) investigating the causal link between diet and gut microbiota and impact of social determinants of health; (3) understanding resilience; (4) testing the effectiveness of multi-level interventions that address social and environmental determinants; and (4) supporting intervention research informed by validated implementation science frameworks.
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Affiliation(s)
- George A Mensah
- Center for Translation Research and Implementation Science, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), 6705 Rockledge Drive, Suite 6070, Bethesda, MD, 20892, USA.
| | - Alison G M Brown
- Division of Cardiovascular Sciences, NHLBI, NIH, 6710 Rockledge Drive, Suite 10115, Bethesda, MD, 20892, USA
| | - Charlotte A Pratt
- Division of Cardiovascular Sciences, NHLBI, NIH, 6710 Rockledge Drive, Suite 10115, Bethesda, MD, 20892, USA
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20
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Kapa S, Chung M, Gopinathannair R, Noseworthy P, Eckhardt L, Leal M, Wan E, Wang PJ. Year in Review in Cardiac Electrophysiology. Circ Arrhythm Electrophysiol 2020; 13:e008733. [PMID: 32423252 DOI: 10.1161/circep.120.008733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In the past year, there have been numerous advances in our understanding of arrhythmia mechanisms, diagnosis, and new therapies. We have seen advances in basic cardiac electrophysiology with data suggesting that secretoneurin may be a biomarker for patients at risk of ventricular arrhythmias, and we have learned of the potential role of an NPR-C (natriuretic peptide receptor-C) in atrial fibrosis and the role of an atrial specific 2-pore potassium channel TASK-1 as a therapeutic target for atrial fibrillation. We have seen studies demonstrating the role of sensory neurons in sleep apnea-related atrial fibrillation and the association between bariatric surgery and atrial fibrillation ablation outcomes. Artificial intelligence applied to electrocardiography has yielded estimates of age, sex, and overall health. We have seen new tools for collection of patient-centered outcomes following catheter ablation. There have been significant advances in the ability to identify ventricular tachycardia termination sites through high-density mapping of deceleration zones. We have learned that right ventricular dysfunction may be a predictor of survival benefit after implantable cardioverter-defibrillator implantation in patients with nonischemic cardiomyopathy. We have seen further insights into the role of His bundle pacing on improving outcomes. As our understanding of cardiac laminopathies advances, we may have new tools to predict arrhythmic event rates in gene carriers. Finally, we have seen numerous advances in the treatment of arrhythmias in patients with congenital heart disease.
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Affiliation(s)
- Suraj Kapa
- Department of Medicine, Mayo Clinic, Rochester, MN (S.K., P.N.)
| | - Mina Chung
- Department of Medicine, Cleveland Clinic, OH (M.C.)
| | | | | | - Lee Eckhardt
- Department of Medicine, University of Wisconsin, Madison (L.E., M.L.)
| | - Miguel Leal
- Department of Medicine, University of Wisconsin, Madison (L.E., M.L.)
| | - Elaine Wan
- Department of Medicine, Columbia University, New York, NY (E.W.)
| | - Paul J Wang
- Department of Medicine, Stanford University, CA (P.J.W.)
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NADPH Oxidase 2 Mediates Myocardial Oxygen Wasting in Obesity. Antioxidants (Basel) 2020; 9:antiox9020171. [PMID: 32093119 PMCID: PMC7070669 DOI: 10.3390/antiox9020171] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/03/2020] [Accepted: 02/17/2020] [Indexed: 12/17/2022] Open
Abstract
Obesity and diabetes are independent risk factors for cardiovascular diseases, and they are associated with the development of a specific cardiomyopathy with elevated myocardial oxygen consumption (MVO2) and impaired cardiac efficiency. Although the pathophysiology of this cardiomyopathy is multifactorial and complex, reactive oxygen species (ROS) may play an important role. One of the major ROS-generating enzymes in the cardiomyocytes is nicotinamide adenine dinucleotide phosphate (NADPH) oxidase 2 (NOX2), and many potential systemic activators of NOX2 are elevated in obesity and diabetes. We hypothesized that NOX2 activity would influence cardiac energetics and/or the progression of ventricular dysfunction following obesity. Myocardial ROS content and mechanoenergetics were measured in the hearts from diet-induced-obese wild type (DIOWT) and global NOK2 knock-out mice (DIOKO) and in diet-induced obese C57BL/6J mice given normal water (DIO) or water supplemented with the NOX2-inhibitor apocynin (DIOAPO). Mitochondrial function and ROS production were also assessed in DIO and DIOAPO mice. This study demonstrated that ablation and pharmacological inhibition of NOX2 both improved mechanical efficiency and reduced MVO2 for non-mechanical cardiac work. Mitochondrial ROS production was also reduced following NOX2 inhibition, while cardiac mitochondrial function was not markedly altered by apocynin-treatment. Therefore, these results indicate a link between obesity-induced myocardial oxygen wasting, NOX2 activation, and mitochondrial ROS.
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