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Appleby S, Aitken-Buck HM, Holdaway MS, Byers MS, Frampton CM, Paton LN, Richards AM, Lamberts RR, Pemberton CJ. Cardiac effects of myoregulin in ischemia-reperfusion. Peptides 2024; 174:171156. [PMID: 38246425 DOI: 10.1016/j.peptides.2024.171156] [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] [Received: 12/06/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 01/23/2024]
Abstract
Myoregulin is a recently discovered micropeptide that controls calcium levels by inhibiting the intracellular calcium pump sarco-endoplasmic reticulum Ca2+-ATPase (SERCA). Keeping calcium levels balanced in the heart is essential for normal heart functioning, thus myoregulin has the potential to be a crucial regulator of cardiac muscle performance by reducing the rate of intracellular Ca2+ uptake. We provide the first report of myoregulin mRNA expression in human heart tissue, absence of expression in human plasma, and the effects of myoregulin on cardiac hemodynamics in an ex vivo Langendorff isolated rat heart model of ischemia/reperfusion. In this preliminary study, myoregulin provided a cardio-protective effect, as assessed by preservation of left ventricular contractility and relaxation, during ischemia/reperfusion. This study provides the foundation for future research in this area.
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Affiliation(s)
- Sarah Appleby
- Christchurch Heart Institute, University of Otago, Christchurch, 2 Riccarton Avenue, Christchurch 8011, New Zealand.
| | - Hamish M Aitken-Buck
- Department of Physiology, HeartOtago, University of Otago, 270 Great King St, Dunedin 9016, New Zealand.
| | - Mark S Holdaway
- Christchurch Heart Institute, University of Otago, Christchurch, 2 Riccarton Avenue, Christchurch 8011, New Zealand.
| | - Mathew S Byers
- Christchurch Heart Institute, University of Otago, Christchurch, 2 Riccarton Avenue, Christchurch 8011, New Zealand.
| | - Chris M Frampton
- Christchurch Heart Institute, University of Otago, Christchurch, 2 Riccarton Avenue, Christchurch 8011, New Zealand.
| | - Louise N Paton
- Christchurch Heart Institute, University of Otago, Christchurch, 2 Riccarton Avenue, Christchurch 8011, New Zealand.
| | - A Mark Richards
- Christchurch Heart Institute, University of Otago, Christchurch, 2 Riccarton Avenue, Christchurch 8011, New Zealand; Department of Cardiology, Te Whatu Ora Waitaha, 2 Riccarton Avenue, Christchurch 8011, New Zealand; Cardiovascular Research Institute, National University of Singapore, 1E Kent Ridge Road, Singapore.
| | - Regis R Lamberts
- Department of Physiology, HeartOtago, University of Otago, 270 Great King St, Dunedin 9016, New Zealand.
| | - Christopher J Pemberton
- Christchurch Heart Institute, University of Otago, Christchurch, 2 Riccarton Avenue, Christchurch 8011, New Zealand.
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2
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Angom RS, Joshi A, Patowary A, Sivadas A, Ramasamy S, K. V. S, Kaushik K, Sabharwal A, Lalwani MK, K. S, Singh N, Scaria V, Sivasubbu S. Forward genetic screen using a gene-breaking trap approach identifies a novel role of grin2bb-associated RNA transcript ( grin2bbART) in zebrafish heart function. Front Cell Dev Biol 2024; 12:1339292. [PMID: 38533084 PMCID: PMC10964321 DOI: 10.3389/fcell.2024.1339292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 02/23/2024] [Indexed: 03/28/2024] Open
Abstract
LncRNA-based control affects cardiac pathophysiologies like myocardial infarction, coronary artery disease, hypertrophy, and myotonic muscular dystrophy. This study used a gene-break transposon (GBT) to screen zebrafish (Danio rerio) for insertional mutagenesis. We identified three insertional mutants where the GBT captured a cardiac gene. One of the adult viable GBT mutants had bradycardia (heart arrhythmia) and enlarged cardiac chambers or hypertrophy; we named it "bigheart." Bigheart mutant insertion maps to grin2bb or N-methyl D-aspartate receptor (NMDAR2B) gene intron 2 in reverse orientation. Rapid amplification of adjacent cDNA ends analysis suggested a new insertion site transcript in the intron 2 of grin2bb. Analysis of the RNA sequencing of wild-type zebrafish heart chambers revealed a possible new transcript at the insertion site. As this putative lncRNA transcript satisfies the canonical signatures, we called this transcript grin2bb associated RNA transcript (grin2bbART). Using in situ hybridization, we confirmed localized grin2bbART expression in the heart, central nervous system, and muscles in the developing embryos and wild-type adult zebrafish atrium and bulbus arteriosus. The bigheart mutant had reduced Grin2bbART expression. We showed that bigheart gene trap insertion excision reversed cardiac-specific arrhythmia and atrial hypertrophy and restored grin2bbART expression. Morpholino-mediated antisense downregulation of grin2bbART in wild-type zebrafish embryos mimicked bigheart mutants; this suggests grin2bbART is linked to bigheart. Cardiovascular tissues use Grin2bb as a calcium-permeable ion channel. Calcium imaging experiments performed on bigheart mutants indicated calcium mishandling in the heart. The bigheart cardiac transcriptome showed differential expression of calcium homeostasis, cardiac remodeling, and contraction genes. Western blot analysis highlighted Camk2d1 and Hdac1 overexpression. We propose that altered calcium activity due to disruption of grin2bbART, a putative lncRNA in bigheart, altered the Camk2d-Hdac pathway, causing heart arrhythmia and hypertrophy in zebrafish.
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Affiliation(s)
- Ramcharan Singh Angom
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine and Science, Jacksonville, FL, United States
| | - Adita Joshi
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
| | - Ashok Patowary
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
| | - Ambily Sivadas
- GN Ramachandran Knowledge Center for Genome Informatics, Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Ghaziabad, India
| | - Soundhar Ramasamy
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
| | - Shamsudheen K. V.
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
- GN Ramachandran Knowledge Center for Genome Informatics, Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Ghaziabad, India
| | - Kriti Kaushik
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Ghaziabad, India
| | - Ankit Sabharwal
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Ghaziabad, India
| | - Mukesh Kumar Lalwani
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
| | - Subburaj K.
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
| | - Naresh Singh
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
| | - Vinod Scaria
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
- GN Ramachandran Knowledge Center for Genome Informatics, Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Ghaziabad, India
| | - Sridhar Sivasubbu
- Genomics and Molecular Medicine, CSIR Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Ghaziabad, India
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3
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Doğan Y, Yilmaz Y, Kelesoğlu S, Calapkorur B, Neşelioglu S, Erel Ö, Kalay N. Are Thiols Useful Biomarkers for Coronary Collateral Circulation in Patients with Stable Coronary Artery Disease? J Clin Med 2023; 12:6361. [PMID: 37835005 PMCID: PMC10573799 DOI: 10.3390/jcm12196361] [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: 08/23/2023] [Revised: 09/12/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023] Open
Abstract
Our aim was to investigate the relationship between thiol, which is the main component of the antioxidant system, and coronary collateral circulation (CCC). Our patients consisted of people with stable coronary artery disease (sCAD) and total occlusion in at least one vessel (n = 249). We divided the patients into two groups, good and poor, according to their CCC degree. We determined that DM, total thiol, and disulfide are independent predictors of poor CCC in multivariate logistic regression analysis (OR: 1.012, 95% CI: 1.008-1.017, p < 0.001; OR: 1.022, 95% CI: 1.000-1.044, p = 0.044; OR: 2.671, 95% CI: 1.238-5.761, p = 0.012, respectively). The ROC analysis showed a cut-off value of 328.7 for native thiol regarding the prediction of poor CCC, with 67.4% specificity and 78% sensitivity. For disulfide, it revealed a cut-off value of 15.1 regarding the prediction of poor CCC, with 57.9% specificity and 69.5% sensitivity. In this study, we detected that the patients with sCAD who developed poor CCC had lower levels of native thiol, total thiol, and disulfide compared to those with good CCC. The most interesting finding of our study is that CCC formation is an effective predictor of the antioxidant cascade rather than the inflammation cascade in sCAD patients.
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Affiliation(s)
- Yasemin Doğan
- Department of Cardiology, Kayseri City Training and Research Hospital, University of Health Sciences, Kayseri 38080, Turkey; (Y.Y.); (B.C.)
| | - Yücel Yilmaz
- Department of Cardiology, Kayseri City Training and Research Hospital, University of Health Sciences, Kayseri 38080, Turkey; (Y.Y.); (B.C.)
| | - Saban Kelesoğlu
- Department of Cardiology, Erciyes University Faculty of Medicine, Kayseri 38039, Turkey; (S.K.); (N.K.)
| | - Bekir Calapkorur
- Department of Cardiology, Kayseri City Training and Research Hospital, University of Health Sciences, Kayseri 38080, Turkey; (Y.Y.); (B.C.)
| | - Salim Neşelioglu
- Department of Biochemistry, Yildirim Beyazit University, Ankara 06800, Turkey; (S.N.); (Ö.E.)
| | - Özcan Erel
- Department of Biochemistry, Yildirim Beyazit University, Ankara 06800, Turkey; (S.N.); (Ö.E.)
| | - Nihat Kalay
- Department of Cardiology, Erciyes University Faculty of Medicine, Kayseri 38039, Turkey; (S.K.); (N.K.)
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Dridi H, Santulli G, Bahlouli L, Miotto MC, Weninger G, Marks AR. Mitochondrial Calcium Overload Plays a Causal Role in Oxidative Stress in the Failing Heart. Biomolecules 2023; 13:1409. [PMID: 37759809 PMCID: PMC10527470 DOI: 10.3390/biom13091409] [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: 08/17/2023] [Revised: 09/13/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023] Open
Abstract
Heart failure is a serious global health challenge, affecting more than 6.2 million people in the United States and is projected to reach over 8 million by 2030. Independent of etiology, failing hearts share common features, including defective calcium (Ca2+) handling, mitochondrial Ca2+ overload, and oxidative stress. In cardiomyocytes, Ca2+ not only regulates excitation-contraction coupling, but also mitochondrial metabolism and oxidative stress signaling, thereby controlling the function and actual destiny of the cell. Understanding the mechanisms of mitochondrial Ca2+ uptake and the molecular pathways involved in the regulation of increased mitochondrial Ca2+ influx is an ongoing challenge in order to identify novel therapeutic targets to alleviate the burden of heart failure. In this review, we discuss the mechanisms underlying altered mitochondrial Ca2+ handling in heart failure and the potential therapeutic strategies.
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Affiliation(s)
- Haikel Dridi
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, Columbia University Vagelos College of Physicians & Surgeons, New York, NY 10032, USA; (L.B.); (M.C.M.); (G.W.); (A.R.M.)
| | - Gaetano Santulli
- Department of Medicine, Division of Cardiology, Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, New York, NY 10461, USA;
| | - Laith Bahlouli
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, Columbia University Vagelos College of Physicians & Surgeons, New York, NY 10032, USA; (L.B.); (M.C.M.); (G.W.); (A.R.M.)
| | - Marco C. Miotto
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, Columbia University Vagelos College of Physicians & Surgeons, New York, NY 10032, USA; (L.B.); (M.C.M.); (G.W.); (A.R.M.)
| | - Gunnar Weninger
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, Columbia University Vagelos College of Physicians & Surgeons, New York, NY 10032, USA; (L.B.); (M.C.M.); (G.W.); (A.R.M.)
| | - Andrew R. Marks
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, Columbia University Vagelos College of Physicians & Surgeons, New York, NY 10032, USA; (L.B.); (M.C.M.); (G.W.); (A.R.M.)
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5
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Kho C. Targeting calcium regulators as therapy for heart failure: focus on the sarcoplasmic reticulum Ca-ATPase pump. Front Cardiovasc Med 2023; 10:1185261. [PMID: 37534277 PMCID: PMC10392702 DOI: 10.3389/fcvm.2023.1185261] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 07/06/2023] [Indexed: 08/04/2023] Open
Abstract
Impaired myocardial Ca2+ cycling is a critical contributor to the development of heart failure (HF), causing changes in the contractile function and structure remodeling of the heart. Within cardiomyocytes, the regulation of sarcoplasmic reticulum (SR) Ca2+ storage and release is largely dependent on Ca2+ handling proteins, such as the SR Ca2+ ATPase (SERCA2a) pump. During the relaxation phase of the cardiac cycle (diastole), SERCA2a plays a critical role in transporting cytosolic Ca2+ back to the SR, which helps to restore both cytosolic Ca2+ levels to their resting state and SR Ca2+ content for the next contraction. However, decreased SERCA2a expression and/or pump activity are key features in HF. As a result, there is a growing interest in developing therapeutic approaches to target SERCA2a. This review provides an overview of the regulatory mechanisms of the SERCA2a pump and explores potential strategies for SERCA2a-targeted therapy, which are being investigated in both preclinical and clinical studies.
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Affiliation(s)
- Changwon Kho
- Division of Applied Medicine, School of Korean Medicine, Pusan National University, Yangsan, Republic of Korea
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6
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MacLeod KT. Changes in cellular Ca 2+ and Na + regulation during the progression towards heart failure. J Physiol 2023; 601:905-921. [PMID: 35946572 PMCID: PMC10952717 DOI: 10.1113/jp283082] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/02/2022] [Indexed: 11/08/2022] Open
Abstract
In adapting to disease and loss of tissue, the heart shows great phenotypic plasticity that involves changes to its structure, composition and electrophysiology. Together with parallel whole body cardiovascular adaptations, the initial decline in cardiac function resulting from the insult is compensated. However, in the long term, the heart muscle begins to fail and patients with this condition have a very poor prognosis, with many dying from disturbances of rhythm. The surviving myocytes of these hearts gain Na+ , which is positively inotropic because of alterations to Ca2+ fluxes mediated by the Na+ /Ca2+ exchange, but compromises Ca2+ -dependent energy metabolism in mitochondria. Uptake of Ca2+ into the sarcoplasmic reticulum (SR) is reduced because of diminished function of SR Ca2+ ATPases. The result of increased Ca2+ influx and reduced SR Ca2+ uptake is an increase in the diastolic cytosolic Ca2+ concentration, which promotes spontaneous SR Ca2+ release and induces delayed afterdepolarisations. Action potential duration prolongs because of increased late Na+ current and changes in expression and function of other ion channels and transporters increasing the probability of the formation of early afterdepolarisations. There is a reduction in T-tubule density and so the normal spatial arrangements required for efficient excitation-contraction coupling are compromised and lead to temporal delays in Ca2+ release from the SR. Therefore, the structural and electrophysiological responses that occur to provide compensation do so at the expense of (1) increasing the likelihood of arrhythmogenesis; (2) activating hypertrophic, apoptotic and Ca2+ signalling pathways; and (3) decreasing the efficiency of SR Ca2+ release.
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Affiliation(s)
- Kenneth T. MacLeod
- National Heart & Lung InstituteImperial Centre for Translational and Experimental MedicineImperial CollegeHammersmith HospitalLondonUK
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7
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Arici M, Ferrandi M, Barassi P, Hsu SC, Torre E, Luraghi A, Ronchi C, Chang GJ, Peri F, Ferrari P, Bianchi G, Rocchetti M, Zaza A. Istaroxime Metabolite PST3093 Selectively Stimulates SERCA2a and Reverses Disease-Induced Changes in Cardiac Function. J Pharmacol Exp Ther 2023; 384:231-244. [PMID: 36153005 DOI: 10.1124/jpet.122.001335] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/11/2022] [Accepted: 08/01/2022] [Indexed: 01/03/2023] Open
Abstract
Heart failure (HF) therapeutic toolkit would strongly benefit from the availability of ino-lusitropic agents with a favorable pharmacodynamics and safety profile. Istaroxime is a promising agent, which combines Na+/K+ pump inhibition with sarcoplasmic reticulum Ca2+ ATPase (SERCA2a) stimulation; however, it has a very short half-life and extensive metabolism to a molecule named PST3093. The present work aims to investigate whether PST3093 still retains the pharmacodynamic and pharmacokinetic properties of its parent compound. We studied PST3093 for its effects on SERCA2a and Na+/K+ ATPase activities, Ca2+ dynamics in isolated myocytes, and hemodynamic effects in an in vivo rat model of diabetic [streptozotocin (STZ)-induced] cardiomyopathy. Istaroxime infusion in HF patients led to accumulation of PST3093 in the plasma; clearance was substantially slower for PST3093 than for istaroxime. In cardiac rat preparations, PST3093 did not inhibit the Na+/K+ ATPase activity but retained SERCA2a stimulatory activity. In in vivo echocardiographic assessment, PST3093 improved overall cardiac performance and reversed most STZ-induced abnormalities. PST3093 intravenous toxicity was considerably lower than that of istaroxime, and it failed to significantly interact with 50 off-targets. Overall, PST3093 is a "selective" SERCA2a activator, the prototype of a novel pharmacodynamic category with a potential in the ino-lusitropic approach to HF with prevailing diastolic dysfunction. Its pharmacodynamics are peculiar, and its pharmacokinetics are suitable to prolong the cardiac beneficial effect of istaroxime infusion. SIGNIFICANCE STATEMENT: Heart failure (HF) treatment would benefit from the availability of ino-lusitropic agents with favourable profiles. PST3093 is the main metabolite of istaroxime, a promising agent combining Na+/K+ pump inhibition and sarcoplasmic reticulum Ca2+ ATPase2a (SERCA2a) stimulation. PST3093 shows a longer half-life in human circulation compared to istaroxime, selectively activates SERCA2a, and improves cardiac performance in a model of diabetic cardiomyopathy. Overall, PST3093 as a selective SERCA2a activator can be considered the prototype of a novel pharmacodynamic category for HF treatment.
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Affiliation(s)
- Martina Arici
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Mara Ferrandi
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Paolo Barassi
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Shih-Che Hsu
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Eleonora Torre
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Andrea Luraghi
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Carlotta Ronchi
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Gwo-Jyh Chang
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Francesco Peri
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Patrizia Ferrari
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Giuseppe Bianchi
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Marcella Rocchetti
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
| | - Antonio Zaza
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy (M.A., E.T., A.L., C.R., F.P., M.R., A.Z.); Windtree Therapeutics Inc., Warrington, Pennsylvania (M.F., P.B., P.F., G.B.); CVie Therapeutics Limited, Taipei, Taiwan (S.-C.H.); Graduate Institute of Clinical Medicinal Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan (G.-J.C.); and Università Vita-Salute San Raffaele, Milan, Italy (G.B.)
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8
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Rodrigues T, Piccirillo S, Magi S, Preziuso A, Dos Santos Ramos V, Serfilippi T, Orciani M, Maciel Palacio Alvarez M, Luis Dos Santos Tersariol I, Amoroso S, Lariccia V. Control of Ca 2+ and metabolic homeostasis by the Na +/Ca 2+ exchangers (NCXs) in health and disease. Biochem Pharmacol 2022; 203:115163. [PMID: 35803319 DOI: 10.1016/j.bcp.2022.115163] [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: 04/01/2022] [Revised: 06/30/2022] [Accepted: 07/01/2022] [Indexed: 11/16/2022]
Abstract
Spatial and temporal control of calcium (Ca2+) levels is essential for the background rhythms and responses of living cells to environmental stimuli. Whatever other regulators a given cellular activity may have, localized and wider scale Ca2+ events (sparks, transients, and waves) are hierarchical determinants of fundamental processes such as cell contraction, excitability, growth, metabolism and survival. Different cell types express specific channels, pumps and exchangers to efficiently generate and adapt Ca2+ patterns to cell requirements. The Na+/Ca2+ exchangers (NCXs) in particular contribute to Ca2+ homeostasis by buffering intracellular Ca2+ loads according to the electrochemical gradients of substrate ions - i.e., Ca2+ and sodium (Na+) - and under a dynamic control of redundant regulatory processes. An interesting feature of NCX emerges from the strict relationship that connects transporter activity with cell metabolism: on the one hand NCX operates under constant control of ATP-dependent regulatory processes, on the other hand the ion fluxes generated through NCX provide mechanistic support for the Na+-driven uptake of glutamate and Ca2+ influx to fuel mitochondrial respiration. Proof of concept evidence highlights therapeutic potential of preserving a timed and balanced NCX activity in a growing rate of diseases (including excitability, neurodegenerative, and proliferative disorders) because of an improved ability of stressed cells to safely maintain ion gradients and mitochondrial bioenergetics. Here, we will summarize and review recent works that have focused on the pathophysiological roles of NCXs in balancing the two-way relationship between Ca2+ signals and metabolism.
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Affiliation(s)
- Tiago Rodrigues
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Santo André, SP, Brazil.
| | - Silvia Piccirillo
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Simona Magi
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Alessandra Preziuso
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Vyctória Dos Santos Ramos
- Interdisciplinary Center for Biochemistry Investigation (CIIB), University of Mogi das Cruzes (UMC), Mogi das Cruzes, SP, Brazil
| | - Tiziano Serfilippi
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Monia Orciani
- Department of Clinical and Molecular Sciences, Histology, University "Politecnica delle Marche", Ancona, Italy.
| | - Marcela Maciel Palacio Alvarez
- Department of Biochemistry, São Paulo School of Medicine, Federal University of São Paulo (Unifesp) São Paulo, SP, Brazil
| | | | - Salvatore Amoroso
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Vincenzo Lariccia
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
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9
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Stempien A, Josvai M, de Lange WJ, Hernandez JJ, Notbohm J, Kamp TJ, Valdivia HH, Eckhardt LL, Maginot KR, Ralphe JC, Crone WC. Identifying Features of Cardiac Disease Phenotypes Based on Mechanical Function in a Catecholaminergic Polymorphic Ventricular Tachycardia Model. Front Bioeng Biotechnol 2022; 10:873531. [PMID: 35620470 PMCID: PMC9127198 DOI: 10.3389/fbioe.2022.873531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 04/12/2022] [Indexed: 11/23/2022] Open
Abstract
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is characterized by an arrhythmogenic mechanism involving disruption of calcium handling. This genetic disease can lead to sudden death in children and young adults during physical or emotional stress. Prior CPVT studies have focused on calcium handling, but mechanical functionality has rarely been investigated in vitro. In this research we combine stem cell-derived cardiomyocytes from a CPVT patient (RyR2-H2464D mutation) and a healthy familial control with an engineered culture platform to evaluate mechanical function of cardiomyocytes. Substrates with Young's modulus ranging from 10 to 50 kPa were used in conjunction with microcontact printing of ECM proteins into defined patterns for subsequent attachment. Digital Image Correlation (DIC) was used to evaluate collections of contracting cells. The amplitude of contractile strain was utilized as a quantitative indicator of functionality and disease severity. We found statistically significant differences: the maximum contractile strain was consistently higher in patient samples compared to control samples on all substrate stiffnesses. Additionally, the patient cell line had a statistically significantly slower intrinsic contraction rate than the control, which agrees with prior literature. Differences in mechanical strain have not been previously reported, and hypercontractility is not a known characteristic of CPVT. However, functional changes can occur as the disease progresses, thus this observation may not represent behavior observed in adolescent and adult patients. These results add to the limited studies of mechanical function of CPVT CMs reported in literature and identify functional differences that should be further explored.
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Affiliation(s)
- A Stempien
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, United States.,Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, United States
| | - M Josvai
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, United States.,Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, United States
| | - W J de Lange
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - J J Hernandez
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - J Notbohm
- Department of Engineering Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - T J Kamp
- Department of Medicine, Division of Cardiovascular Medicine, University of Wisconsin-Madison, Madison, WI, United States.,Department of Cell and Regenerative Biology, University of Wisconsin-Madison, Madison, WI, United States.,Cellular and Molecular Arrhythmia Research Program, Department of Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - H H Valdivia
- Department of Medicine, Division of Cardiovascular Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - L L Eckhardt
- Department of Medicine, Division of Cardiovascular Medicine, University of Wisconsin-Madison, Madison, WI, United States.,Cellular and Molecular Arrhythmia Research Program, Department of Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - K R Maginot
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - J C Ralphe
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - W C Crone
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, United States.,Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, United States.,Department of Engineering Physics, University of Wisconsin-Madison, Madison, WI, United States
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10
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Agaltsov MV, Drapkina OM. Obstructive sleep apnea and cardiovascular comorbidity: common pathophysiological mechanisms to cardiovascular disease. RATIONAL PHARMACOTHERAPY IN CARDIOLOGY 2021. [DOI: 10.20996/1819-6446-2021-08-05] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Obstructive sleep apnea (OSA) is associated with many cardiovascular and metabolic diseases. Sleep apnea causes intermittent hypoxemia, chest pressure fluctuations and a reaction from the cerebral cortex in the form of a short awakening during sleep (EEG-activation). The consequences of pathological pathways are studied in experimental models involving cell cultures, animals, and healthy volunteers. At present, the negative impact of intermittent hypoxemia on a variety of pathophysiological disorders of the heart and blood vessels (vascular tone fluctuations, thickening of the intimamedia complex in the vascular wall, direct damaging effect on the myocardium) has a great evidence base. Two other pathological components of OSA (pressure fluctuations and EEG-activation) can also affect cardiovascular system, mainly affecting the increase in blood pressure and changing cardiac hemodynamics. Although these reactions are considered separately in the review, with the development of sleep apnea they occur sequentially and are closely interrelated. As a result, these pathological pathways trigger further pathophysiological mechanisms acting on the heart and blood vessels. It is known that these include excessive sympathetic activation, inflammation, oxidative stress and metabolic dysregulation. In many respects being links of one process, these mechanisms can trigger damage to the vascular wall, contributing to the formation of atherosclerotic lesions. The accumulated data with varying degrees of reliability confirm the participation of OSA through these processes in the formation of cardiovascular disorders. There are factors limiting direct evidence of this interaction (sleep deprivation, causing similar changes, as well as the inability to share the contribution of other risk factors for cardiovascular diseases, in particular arterial hypertension, obesity, which are often associated with OSA). It is necessary to continue the study of processes that implement the pathological effect of OSA on the cardiovascular system.
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Affiliation(s)
- M. V. Agaltsov
- National Medical Research Center for Therapy and Preventive Medicine
| | - O. M. Drapkina
- National Medical Research Center for Therapy and Preventive Medicine
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11
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Tsai YN, Hsiao YW, Lin SF, Chan YH, Hsieh YC, Tang WH, Lee AS, Huang YT, Li HY, Chao TF, Higa S, Wu TJ, Chang SL, Chen SA. Proinflammatory Cytokine Modulates Intracellular Calcium Handling and Enhances Ventricular Arrhythmia Susceptibility. Front Cardiovasc Med 2021; 8:623510. [PMID: 33796569 PMCID: PMC8007768 DOI: 10.3389/fcvm.2021.623510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/22/2021] [Indexed: 11/13/2022] Open
Abstract
Background: The mechanism of Interleukin-17 (IL-17) induced ventricular arrhythmia (VA) remains unclear. This study aimed to investigate the effect of intracellular calcium (Cai) handling and VA susceptibility by IL-17. Methods: The electrophysiological properties of isolated perfused rabbit hearts under IL-17 (20 ng/ml, N = 6) and the IL-17 with neutralizer (0.4 μg/ml, N = 6) were evaluated using an optical mapping system. The action potential duration (APD) and Cai transient duration (CaiTD) were examined, and semiquantitative reverse transcriptase-polymerase chain reaction analysis of ion channels was performed. Results: There were longer APD80, CaiTD80 and increased thresholds of APD and CaiTD alternans, the maximum slope of APD restitution and induction of VA threshold in IL-17 group compared with those in IL-17 neutralizer and baseline groups. During ventricular fibrillation, the number of phase singularities and dominant frequency were both significantly greater in IL-17 group than in baseline group. The mRNA expressions of the Na+/Ca2+ exchanger, phospholamban, and ryanodine receptor Ca2+ release channel were upregulated, and the subunit of L-type Ca2+ current and sarcoplasmic reticulum Ca2+-ATPase 2a were significantly reduced in IL-17 group compared to baseline and IL-17 neutralizer group. Conclusions: IL-17 enhanced CaiTD and APD alternans through disturbances in calcium handling, which may increase VA susceptibility.
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Affiliation(s)
- Yung-Nan Tsai
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Department of Medicine, Heart Rhythm Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ya-Wen Hsiao
- Division of Cardiology, Department of Medicine, Heart Rhythm Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shien-Fong Lin
- Institute of Biomedical Engineering, National Chiao-Tung University, Hsin-Chu, Taiwan
| | - Yi-Hsin Chan
- Division of Cardiology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yu-Cheng Hsieh
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Internal Medicine, Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Wei-Hua Tang
- Division of Cardiology, Department of Medicine, Heart Rhythm Center, Taipei Veterans General Hospital, Taipei, Taiwan.,Division of Cardiology, Department of Internal Medicine, National Yang-Ming University Hospital, Yilan, Taiwan
| | - An-Sheng Lee
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan
| | - Yu-Ting Huang
- Division of Cardiology, Department of Medicine, Heart Rhythm Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hsing-Yuan Li
- Division of Cardiology, Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Tze-Fan Chao
- Division of Cardiology, Department of Medicine, Heart Rhythm Center, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Satoshi Higa
- Cardiac Electrophysiology and Pacing Laboratory, Division of Cardiovascular Medicine, Makiminato Central Hospital, Urasoe, Japan
| | - Tsu-Juey Wu
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Internal Medicine, Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Shih-Lin Chang
- Division of Cardiology, Department of Medicine, Heart Rhythm Center, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shih-Ann Chen
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Department of Medicine, Heart Rhythm Center, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Internal Medicine, Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan.,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
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12
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Xu X, Xie X, Zhang H, Wang P, Li G, Chen J, Chen G, Cao X, Xiong L, Peng F, Peng C. Water-soluble alkaloids extracted from Aconiti Radix lateralis praeparata protect against chronic heart failure in rats via a calcium signaling pathway. Biomed Pharmacother 2021; 135:111184. [PMID: 33418305 DOI: 10.1016/j.biopha.2020.111184] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/15/2020] [Accepted: 12/26/2020] [Indexed: 11/16/2022] Open
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Many studies have shown the beneficial effects of aconite water-soluble alkaloid extract (AWA) in experimental models of heart disease, which have been ascribed to the presence of aconine, hypaconine, talatisamine, fuziline, neoline, and songorine. This study evaluated the effects of a chemically characterized AWA by chemical content, evaluated its effects in suprarenal abdominal aortic coarctation surgery (AAC)-induced chronic heart failure (CHF) in rats, and revealed the underlying mechanisms of action by proteomics. METHODS Rats were distributed into different groups: sham, model, and AWA-treated groups (10, 20, and 40 mg/kg/day). Sham rats received surgery without AAC, whereas model rats an AWA-treated groups underwent AAC surgery. after 8 weeks, the treatment group was fed AWA for 4 weeks, and body weight was assessed weekly. At the end of the treatment, heart function was tested by echocardiography. AAC-induced chronic heart failure, including myocardial fibrosis, cardiomyocyte hypertrophy, and apoptosis, was evaluated in heart tissue and plasma by RT-qPCR, ELISA, hematoxylin and eosin (H&E) staining, Masson's trichrome staining, TUNEL staining, and immunofluorescence staining of α-SMA, Col Ⅰ, and Col Ⅲ. Then, a proteomics approach was used to explore the underlying mechanisms of action of AWA in chronic heart failure. RESULTS AWA administration reduced body weight gain, myocardial fibrosis, cardiomyocyte hypertrophy, and apoptosis, and rats showed improvement in cardiac function compared to model group. The extract significantly ameliorated the AAC-induced altered expression of heart failure markers such as ANP, NT-proBNP, and β-MHC, as well as fibrosis, hypertrophy markers MMP-2 and MMP-9, and other heart failure-related factors including plasma levels of TNF-α and IL-6. Furthermore, the extract reduced the protein expression of α-SMA, Col Ⅰ, and Col Ⅲ in the left ventricular (LV), thus inhibiting the LV remodeling associated with CHF. In addition, proteomics characterization of differentially expressed proteins showed that AWA administration inhibited left ventricular remodeling in CHF rats via a calcium signaling pathway, and reversed the expression of RyR2 and SERCA2a. CONCLUSIONS AWA extract exerts beneficial effects in an AAC-induced CHF model in rats, which was associated with an improvement in LV function, hypertrophy, fibrosis, and apoptotic status. These effects may be related to the regulation of calcium signaling by the altered expression of RyR2 and SERCA2a.
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MESH Headings
- Aconitum/chemistry
- Animals
- Apoptosis/drug effects
- Calcium Signaling/drug effects
- Cardiovascular Agents/isolation & purification
- Cardiovascular Agents/pharmacology
- Chronic Disease
- Disease Models, Animal
- Fibrosis
- Heart Failure/drug therapy
- Heart Failure/metabolism
- Heart Failure/pathology
- Heart Failure/physiopathology
- Hypertrophy, Left Ventricular/drug therapy
- Hypertrophy, Left Ventricular/metabolism
- Hypertrophy, Left Ventricular/pathology
- Hypertrophy, Left Ventricular/physiopathology
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Plant Extracts/isolation & purification
- Plant Extracts/pharmacology
- Rats, Sprague-Dawley
- Ryanodine Receptor Calcium Release Channel/metabolism
- Sarcoplasmic Reticulum Calcium-Transporting ATPases/metabolism
- Solubility
- Solvents/chemistry
- Ventricular Dysfunction, Left/drug therapy
- Ventricular Dysfunction, Left/metabolism
- Ventricular Dysfunction, Left/pathology
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Function, Left/drug effects
- Ventricular Remodeling/drug effects
- Water/chemistry
- Rats
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Affiliation(s)
- Xin Xu
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu 611137, China; Key Laboratory of the Ministry of Education for Standardization of Chinese Medicine Co-founded by Sichuan Province and MOST, Chengdu 611137, China
| | - Xiaofang Xie
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu 611137, China; Key Laboratory of the Ministry of Education for Standardization of Chinese Medicine Co-founded by Sichuan Province and MOST, Chengdu 611137, China
| | - Huiqiong Zhang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu 611137, China; Key Laboratory of the Ministry of Education for Standardization of Chinese Medicine Co-founded by Sichuan Province and MOST, Chengdu 611137, China
| | - Pei Wang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Gangmin Li
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu 611137, China; Key Laboratory of the Ministry of Education for Standardization of Chinese Medicine Co-founded by Sichuan Province and MOST, Chengdu 611137, China
| | - Junren Chen
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu 611137, China; Key Laboratory of the Ministry of Education for Standardization of Chinese Medicine Co-founded by Sichuan Province and MOST, Chengdu 611137, China
| | - Guanru Chen
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu 611137, China; Key Laboratory of the Ministry of Education for Standardization of Chinese Medicine Co-founded by Sichuan Province and MOST, Chengdu 611137, China
| | - Xiaoyu Cao
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Liang Xiong
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu 611137, China; Key Laboratory of the Ministry of Education for Standardization of Chinese Medicine Co-founded by Sichuan Province and MOST, Chengdu 611137, China
| | - Fu Peng
- West China School of Pharmacy, Sichuan University, Chengdu 611137, China.
| | - Cheng Peng
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu 611137, China; Key Laboratory of the Ministry of Education for Standardization of Chinese Medicine Co-founded by Sichuan Province and MOST, Chengdu 611137, China.
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13
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Mazeto I, Okoshi K, Silveira C, Sant'Ana P, da Silva V, Mota G, de Souza S, Vileigas D, Padovani C, Cicogna A. Calcium homeostasis behavior and cardiac function on left ventricular remodeling by pressure overload. Braz J Med Biol Res 2021; 54:e10138. [PMID: 33624728 PMCID: PMC7894392 DOI: 10.1590/1414-431x202010138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 11/12/2020] [Indexed: 11/22/2022] Open
Abstract
Sarcoplasmic reticulum Ca2+-ATPase (SERCA2a) and sarcolemmal Na+/Ca2+ exchanger (NCX1) structures are involved in heart cell Ca2+ homeostasis. Previous studies have shown discrepancies in their function and expression in heart failure. The goal of this study was to evaluate heart function and hypertrophied muscle Ca2+-handling protein behavior under pressure overload. Twenty male Wistar rats were divided into two groups: Aortic stenosis (AoS), induced by a clip placed at the beginning of the aorta, and Control (Sham). After 18 weeks, heart function and structure were evaluated by echocardiogram. Myocardial function was analyzed by isolated papillary muscle (IPM) at basal condition and Ca2+ protein functions were evaluated after post-pause contraction and blockage with cyclopiazonic acid in IPM. Ca2+-handling protein expression was studied by western blot (WB). Echocardiogram showed that AoS caused concentric hypertrophy with enhanced ejection fraction and diastolic dysfunction inferred by dilated left atrium and increased relative wall thickness. IPM study showed developed tension was the same in both groups. AoS showed increased stiffness revealed by enhanced resting tension, and changes in Ca2+ homeostasis shown by calcium elevation and SERCA2a blockage maneuvers. WB revealed decreased NCX1, SERCA2a, and phosphorylated phospholambam (PLB) on serine-16 in AoS. AoS had left ventricular hypertrophy and diastolic dysfunction compared to Sham; this could be related to our findings regarding calcium homeostasis behavior: deficit in NCX1, SERCA2a, and phosphorylated PLB on serine-16.
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Affiliation(s)
- I.F.S. Mazeto
- Departamento de Infectologia, Dermatologia, Diagnóstico por Imagem e Radioterapia, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - K. Okoshi
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - C.F.S.M.P. Silveira
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - P.G. Sant'Ana
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - V.L. da Silva
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - G.A.F. Mota
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - S.L.B. de Souza
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - D.F. Vileigas
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - C.R. Padovani
- Departamento de Bioestatística, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - A.C. Cicogna
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
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14
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Madsen A, Krause J, Höppner G, Hirt MN, Tan WLW, Lim I, Hansen A, Nikolaev VO, Foo RSY, Eschenhagen T, Stenzig J. Hypertrophic signaling compensates for contractile and metabolic consequences of DNA methyltransferase 3A loss in human cardiomyocytes. J Mol Cell Cardiol 2021; 154:115-123. [PMID: 33582159 DOI: 10.1016/j.yjmcc.2021.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 01/16/2021] [Accepted: 02/03/2021] [Indexed: 11/16/2022]
Abstract
The role of DNA methylation in cardiomyocyte physiology and cardiac disease remains a matter of controversy. We have recently provided evidence for an important role of DNMT3A in human cardiomyocyte cell homeostasis and metabolism, using engineered heart tissue (EHT) generated from human induced pluripotent stem cell (hiPSC)-derived cardiomyocytes carrying a knockout of the de novo DNA methyltransferase DNMT3A. Unlike isogenic control EHT, knockout EHT displayed morphological abnormalities such as lipid accumulations inside cardiomyocytes associated with impaired mitochondrial metabolism, as well as functional defects and impaired glucose metabolism. Here, we analyzed the role of DNMT3A in the setting of cardiac hypertrophy. We induced hypertrophic signaling by treatment with 50 nM endothelin-1 and 20 μM phenylephrine for one week and assessed EHT contractility, morphology, DNA methylation, and gene expression. While both knockout EHTs and isogenic controls showed the expected activation of the hypertrophic gene program, knockout EHTs were protected from hypertrophy-related functional impairment. Conversely, hypertrophic treatment prevented the metabolic consequences of a loss of DNMT3A, i.e. abolished lipid accumulation in cardiomyocytes likely by partial normalization of mitochondrial metabolism and restored glucose metabolism and metabolism-related gene expression of knockout EHT. Together, these data suggest an important role of DNA methylation not only for cardiomyocyte physiology, but also in the setting of cardiac disease.
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Affiliation(s)
- Alexandra Madsen
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany
| | - Julia Krause
- DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany; Department of Cardiology, University Heart and Vascular Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Grit Höppner
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany
| | - Marc N Hirt
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany
| | | | - Ives Lim
- Genome Institute of Singapore, 138672, Singapore; Cardiovascular Research Institute, National University of Singapore, 119077, Singapore
| | - Arne Hansen
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany
| | - Viacheslav O Nikolaev
- DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany; Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Roger S Y Foo
- Genome Institute of Singapore, 138672, Singapore; Cardiovascular Research Institute, National University of Singapore, 119077, Singapore
| | - Thomas Eschenhagen
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany
| | - Justus Stenzig
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany.
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15
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Madsen A, Höppner G, Krause J, Hirt MN, Laufer SD, Schweizer M, Tan WLW, Mosqueira D, Anene-Nzelu CG, Lim I, Foo RSY, Eschenhagen T, Stenzig J. An Important Role for DNMT3A-Mediated DNA Methylation in Cardiomyocyte Metabolism and Contractility. Circulation 2020; 142:1562-1578. [PMID: 32885664 PMCID: PMC7566310 DOI: 10.1161/circulationaha.119.044444] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Supplemental Digital Content is available in the text. Background: DNA methylation acts as a mechanism of gene transcription regulation. It has recently gained attention as a possible therapeutic target in cardiac hypertrophy and heart failure. However, its exact role in cardiomyocytes remains controversial. Thus, we knocked out the main de novo DNA methyltransferase in cardiomyocytes, DNMT3A, in human induced pluripotent stem cells. Functional consequences of DNA methylation-deficiency under control and stress conditions were then assessed in human engineered heart tissue from knockout human induced pluripotent stem cell–derived cardiomyocytes. Methods: DNMT3A was knocked out in human induced pluripotent stem cells by CRISPR/Cas9gene editing. Fibrin-based engineered heart tissue was generated from knockout and control human induced pluripotent stem cell–derived cardiomyocytes. Development and baseline contractility were analyzed by video-optical recording. Engineered heart tissue was subjected to different stress protocols, including serum starvation, serum variation, and restrictive feeding. Molecular, histological, and ultrastructural analyses were performed afterward. Results: Knockout of DNMT3A in human cardiomyocytes had three main consequences for cardiomyocyte morphology and function: (1) Gene expression changes of contractile proteins such as higher atrial gene expression and lower MYH7/MYH6 ratio correlated with different contraction kinetics in knockout versus wild-type; (2) Aberrant activation of the glucose/lipid metabolism regulator peroxisome proliferator-activated receptor gamma was associated with accumulation of lipid vacuoles within knockout cardiomyocytes; (3) Hypoxia-inducible factor 1α protein instability was associated with impaired glucose metabolism and lower glycolytic enzyme expression, rendering knockout-engineered heart tissue sensitive to metabolic stress such as serum withdrawal and restrictive feeding. Conclusion: The results suggest an important role of DNA methylation in the normal homeostasis of cardiomyocytes and during cardiac stress, which could make it an interesting target for cardiac therapy.
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Affiliation(s)
- Alexandra Madsen
- Institute of Experimental Pharmacology and Toxicology (A.M., G.H., M.N.H., S.D.L., T.E., J.S.), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany (A.M., G.H., J.K., M.N.H., S.D.L., T.E., J.S.)
| | - Grit Höppner
- Institute of Experimental Pharmacology and Toxicology (A.M., G.H., M.N.H., S.D.L., T.E., J.S.), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany (A.M., G.H., J.K., M.N.H., S.D.L., T.E., J.S.)
| | - Julia Krause
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany (A.M., G.H., J.K., M.N.H., S.D.L., T.E., J.S.).,Department of Cardiology, University Heart and Vascular Center Hamburg, Germany (J.K.)
| | - Marc N Hirt
- Institute of Experimental Pharmacology and Toxicology (A.M., G.H., M.N.H., S.D.L., T.E., J.S.), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany (A.M., G.H., J.K., M.N.H., S.D.L., T.E., J.S.)
| | - Sandra D Laufer
- Institute of Experimental Pharmacology and Toxicology (A.M., G.H., M.N.H., S.D.L., T.E., J.S.), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany (A.M., G.H., J.K., M.N.H., S.D.L., T.E., J.S.)
| | - Michaela Schweizer
- Department of Morphology and Electron Microscopy, Center for Molecular Neurobiology (M.S.), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Diogo Mosqueira
- Division of Cancer & Stem Cells, Biodiscovery Institute, University of Nottingham, United Kingdom (D.M.)
| | - Chukwuemeka George Anene-Nzelu
- Genome Institute of Singapore (W.L.W.T., C.G.A.-N., I.L., R.S.Y.F.).,Cardiovascular Research Institute, National University of Singapore (C.G.A.-N., I.L., R.S.Y.F.)
| | - Ives Lim
- Genome Institute of Singapore (W.L.W.T., C.G.A.-N., I.L., R.S.Y.F.)
| | - Roger S Y Foo
- Genome Institute of Singapore (W.L.W.T., C.G.A.-N., I.L., R.S.Y.F.).,Cardiovascular Research Institute, National University of Singapore (C.G.A.-N., I.L., R.S.Y.F.)
| | - Thomas Eschenhagen
- Institute of Experimental Pharmacology and Toxicology (A.M., G.H., M.N.H., S.D.L., T.E., J.S.), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany (A.M., G.H., J.K., M.N.H., S.D.L., T.E., J.S.)
| | - Justus Stenzig
- Institute of Experimental Pharmacology and Toxicology (A.M., G.H., M.N.H., S.D.L., T.E., J.S.), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany (A.M., G.H., J.K., M.N.H., S.D.L., T.E., J.S.)
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16
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The molecular mechanisms associated with the physiological responses to inflammation and oxidative stress in cardiovascular diseases. Biophys Rev 2020; 12:947-968. [PMID: 32691301 PMCID: PMC7429613 DOI: 10.1007/s12551-020-00742-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/13/2020] [Indexed: 02/07/2023] Open
Abstract
The complex physiological signal transduction networks that respond to the dual challenges of inflammatory and oxidative stress are major factors that promote the development of cardiovascular pathologies. These signaling networks contribute to the development of age-related diseases, suggesting crosstalk between the development of aging and cardiovascular disease. Inhibition and/or attenuation of these signaling networks also delays the onset of disease. Therefore, a concept of targeting the signaling networks that are involved in inflammation and oxidative stress may represent a novel treatment paradigm for many types of heart disease. In this review, we discuss the molecular mechanisms associated with the physiological responses to inflammation and oxidative stress especially in heart failure with preserved ejection fraction and emphasize the nature of the crosstalk of these signaling processes as well as possible therapeutic implications for cardiovascular medicine.
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17
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Liu Z, Zhang Y, Qiu C, Zhu H, Pan S, Jia H, Kang H, Guan G, Hui R, Zhu L, Wang J. Diabetes mellitus exacerbates post-myocardial infarction heart failure by reducing sarcolipin promoter methylation. ESC Heart Fail 2020; 7:1935-1948. [PMID: 32525286 PMCID: PMC7373908 DOI: 10.1002/ehf2.12789] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 04/29/2020] [Accepted: 05/07/2020] [Indexed: 12/15/2022] Open
Abstract
Aims Sarcolipin (SLN) is a key regulator of sarcoplasmic reticulum calcium‐ATPase (SERCA)2a, which handles intracellular calcium re‐uptake. This study was aimed to investigate the involvement of SLN in post‐myocardial infarction (MI) heart failure (HF) in diabetes. Methods and results Diabetes/MI rat models were established. Altered SLN expression in diabetic hearts was screened out by microarray. A myocardiotropic viral vector was used to deliver siRNA to silence SLN. DNA methylation was evaluated by bisulfite sequencing. Cardiac functions were evaluated by invasive haemodynamic examinations. The SERCA2a activity, cytoplasmic calcium concentration ([Ca2+]i), calcium spark, and myocyte contraction were detected. Correlation between HF and diabetes was analysed in a cohort consisted of 101 ST‐segment elevated myocardial infarction (STEMI) patients between 2017 and 2019 [53.54 ± 4.64 years old; 61.4% male gender; HbA1c% 6.15 ± 2.00; and left ventricular ejection fraction (LVEF%) 40.64 ± 3.20%]. SLN expression was evaluated in left ventricular tissue sample from six STEMI patients complicated with diabetes and six STEMI patients without diabetes. Expressions of DNA methyltransferase 1a and DNA methyltransferase 3 were reduced in diabetic hearts, leading to down‐regulation of SLN promoter methylation, resulting in increased SLN expression in rats. Impaired heart systolic functions were found in experimental diabetic MI rats, which were attenuated by SLN silencing. SERCA2a activity reduction and [Ca2+]i elevation were attenuated by SLN silencing in diabetic animal hearts and high‐glucose incubated primary myocytes. SLN silencing suppressed calcium sparks and improved contraction and sarcoplasmic reticulum calcium re‐uptake in high‐glucose incubated primary myocytes. Expression of SLN was up‐regulated in LV sampled from STEMI patients complicated with diabetes compared with non‐diabetic ones (P < 0.05). LVEF% was reduced in STEMI patients complicated with diabetes compared with non‐diabetic ones (P < 0.01). HbA1c% and LVEF% was related (r = −0.218, P = 0.028). Increased HbA1c% was correlated with reduced LVEF% after adjustment for age, sex, body mass index, cigarette smoking, creatinine, UA, low density lipoprotein, K+, Na+, and troponin I (adjusted odds ration = 0.75, 95% confidence interval 0.62–0.90, P = 0.002). Conclusions Diabetes increases the vulnerability of STEMI patients to post‐MI HF by down‐regulating SLN promoter methylation, which further regulates SERCA2a activity via increasing cardiac SLN expression.
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Affiliation(s)
- Zhongwei Liu
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi Province, 710068, China
| | - Yong Zhang
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi Province, 710068, China
| | - Chuan Qiu
- Center for Bioinformatics and Genomics, Department of Global Biostatistics and Data Science, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA
| | - Haitao Zhu
- Department of Pediatrics, Northwest Women's and Children's Hospital, Xi'an, China
| | - Shuo Pan
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi Province, 710068, China
| | - Hao Jia
- International Medical Services, Affiliated Hospital of Northwest University, Xi'an, China
| | - Hongyan Kang
- Department of Cardiology, Heyang County People's Hospital, Weinan, China
| | - Gongchang Guan
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi Province, 710068, China
| | - Rutai Hui
- Department of Cardiology, Fuwai Hospital, National Center of Cardiovascular Diseases, Beijing, China
| | - Ling Zhu
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi Province, 710068, China
| | - Junkui Wang
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi Province, 710068, China
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18
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Ge Z, Li A, McNamara J, Dos Remedios C, Lal S. Pathogenesis and pathophysiology of heart failure with reduced ejection fraction: translation to human studies. Heart Fail Rev 2020; 24:743-758. [PMID: 31209771 DOI: 10.1007/s10741-019-09806-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Heart failure represents the end result of different pathophysiologic processes, which culminate in functional impairment. Regardless of its aetiology, the presentation of heart failure usually involves symptoms of pump failure and congestion, which forms the basis for clinical diagnosis. Pathophysiologic descriptions of heart failure with reduced ejection fraction (HFrEF) are being established. Most commonly, HFrEF is centred on a reactive model where a significant initial insult leads to reduced cardiac output, further triggering a cascade of maladaptive processes. Predisposing factors include myocardial injury of any cause, chronically abnormal loading due to hypertension, valvular disease, or tachyarrhythmias. The pathophysiologic processes behind remodelling in heart failure are complex and reflect systemic neurohormonal activation, peripheral vascular effects and localised changes affecting the cardiac substrate. These abnormalities have been the subject of intense research. Much of the translational successes in HFrEF have come from targeting neurohormonal responses to reduced cardiac output, with blockade of the renin-angiotensin-aldosterone system (RAAS) and beta-adrenergic blockade being particularly fruitful. However, mortality and morbidity associated with heart failure remains high. Although systemic neurohormonal blockade slows disease progression, localised ventricular remodelling still adversely affects contractile function. Novel therapy targeted at improving cardiac contractile mechanics in HFrEF hold the promise of alleviating heart failure at its source, yet so far none has found success. Nevertheless, there are increasing calls for a proximal, 'cardiocentric' approach to therapy. In this review, we examine HFrEF therapy aimed at improving cardiac function with a focus on recent trials and emerging targets.
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Affiliation(s)
- Zijun Ge
- Sydney Medical School, University of Sydney, Camperdown, Australia
- Bosch Institute, School of Medical Sciences, University of Sydney, Camperdown, Australia
| | - Amy Li
- Bosch Institute, School of Medical Sciences, University of Sydney, Camperdown, Australia
- Department of Pharmacy and Biomedical Science, La Trobe University, Melbourne, Australia
| | - James McNamara
- Bosch Institute, School of Medical Sciences, University of Sydney, Camperdown, Australia
| | - Cris Dos Remedios
- Bosch Institute, School of Medical Sciences, University of Sydney, Camperdown, Australia
| | - Sean Lal
- Sydney Medical School, University of Sydney, Camperdown, Australia.
- Bosch Institute, School of Medical Sciences, University of Sydney, Camperdown, Australia.
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia.
- Cardiac Research Laboratory, Discipline of Anatomy and Histology, University of Sydney, Anderson Stuart Building (F13), Camperdown, NSW, 2006, Australia.
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19
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Toll-Like Receptor-Mediated Cardiac Injury during Experimental Sepsis. Mediators Inflamm 2020; 2020:6051983. [PMID: 32410859 PMCID: PMC7199613 DOI: 10.1155/2020/6051983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 12/20/2019] [Indexed: 12/19/2022] Open
Abstract
Sepsis is associated with global cardiac dysfunction and with high mortality rate. The development of septic cardiomyopathy is due to complex interactions of damage-associated molecular patters, cytokines, and complement activation products. The aim of this study was to define the effects of sepsis on cardiac structure, gap junction, and tight junction (TJ) proteins. Sepsis was induced by cecal ligation and puncture in male C57BL/6 mice. After a period of 24 h, the expression of cardiac structure, gap junction, and TJ proteins was determined. Murine HL-1 cells were stimulated with LPS, and mRNA expression of cardiac structure and gap junction proteins, intracellular reactive oxygen species, and troponin I release was analyzed. Furthermore, pyrogenic receptor subtype 7 (P2X7) expression and troponin I release of human cardiomyocytes (iPS) were determined after LPS exposure. In vivo, protein expression of connexin43 and α-actinin was decreased after the onset of polymicrobial sepsis, whereas in HL-1 cells, mRNA expression of connexin43, α-actinin, and desmin was increased in the presence of LPS. Expression of TJ proteins was not affected in vivo during sepsis. Although the presence of LPS and nigericin resulted in a significant troponin I release from HL-1 cells. Sepsis affected cardiac structure and gap junction proteins in mice, potentially contributing to compromised cardiac function.
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20
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Oldfield CJ, Duhamel TA, Dhalla NS. Mechanisms for the transition from physiological to pathological cardiac hypertrophy. Can J Physiol Pharmacol 2020; 98:74-84. [DOI: 10.1139/cjpp-2019-0566] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The heart is capable of responding to stressful situations by increasing muscle mass, which is broadly defined as cardiac hypertrophy. This phenomenon minimizes ventricular wall stress for the heart undergoing a greater than normal workload. At initial stages, cardiac hypertrophy is associated with normal or enhanced cardiac function and is considered to be adaptive or physiological; however, at later stages, if the stimulus is not removed, it is associated with contractile dysfunction and is termed as pathological cardiac hypertrophy. It is during physiological cardiac hypertrophy where the function of subcellular organelles, including the sarcolemma, sarcoplasmic reticulum, mitochondria, and myofibrils, may be upregulated, while pathological cardiac hypertrophy is associated with downregulation of these subcellular activities. The transition of physiological cardiac hypertrophy to pathological cardiac hypertrophy may be due to the reduction in blood supply to hypertrophied myocardium as a consequence of reduced capillary density. Oxidative stress, inflammatory processes, Ca2+-handling abnormalities, and apoptosis in cardiomyocytes are suggested to play a critical role in the depression of contractile function during the development of pathological hypertrophy.
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Affiliation(s)
- Christopher J. Oldfield
- Faculty of Kinesiology & Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
| | - Todd A. Duhamel
- Faculty of Kinesiology & Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
| | - Naranjan S. Dhalla
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
- Department of Physiology & Pathophysiology, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
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21
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Zhao J, Xu T, Zhou Y, Zhou Y, Xia Y, Li D. B-type natriuretic peptide and its role in altering Ca 2+-regulatory proteins in heart failure-mechanistic insights. Heart Fail Rev 2019; 25:861-871. [PMID: 31820203 DOI: 10.1007/s10741-019-09883-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Heart failure (HF) is a worldwide disease with high levels of morbidity and mortality. The pathogenesis of HF is complicated and involves imbalances in hormone and electrolyte. B-type natriuretic peptide (BNP) has served as a biomarker of HF severity, and in recent years, it has been used to treat the disease, thanks to its cardio-protective effects, such as diuresis, natriuresis, and vasodilatation. In stage C/D HF, symptoms are severe despite elevated BNP. Disturbances in Ca2+ homeostasis are often a dominating feature of the disease, causing Ca2+-regulatory protein dysfunction, including reduced expression and activity of sarcoplasmic reticulum Ca2+-ATPase2a (SERCA2a), impaired ryanodine receptors (RYRs) function, intensive Na+-Ca2+ exchanger (NCX), and downregulation of S100A1. The relationship between natriuretic peptides (NPs) and Ca2+-regulatory proteins has been widely studied and represents important mechanisms in the etiology of HF. In this review, we present evidence that BNP may regulate Ca2+-regulatory proteins, in particular, suppressing SERCA2a and S100A1 expression. However, relationships between BNP and other Ca2+-regulatory proteins remain vague.
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Affiliation(s)
- Jiaqi Zhao
- Institute of Cardiovascular Disease Research, Xuzhou Medical University, Xuzhou, Jiangsu, People's Republic of China
| | - Tongda Xu
- Department of Cardiology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, People's Republic of China
| | - Yao Zhou
- Institute of Cardiovascular Disease Research, Xuzhou Medical University, Xuzhou, Jiangsu, People's Republic of China
| | - You Zhou
- Institute of Cardiovascular Disease Research, Xuzhou Medical University, Xuzhou, Jiangsu, People's Republic of China
| | - Yong Xia
- Department of Cardiology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, People's Republic of China.
| | - Dongye Li
- Institute of Cardiovascular Disease Research, Xuzhou Medical University, Xuzhou, Jiangsu, People's Republic of China. .,Department of Cardiology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, People's Republic of China.
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22
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Augusto JB, Antunes S, Ferreira JB, Faria D, Roque D, Beringuilho M, Ferreira H, Fialho I, Faustino M, Cabanelas N, Ferreira AR, Vasconcelos H, Santos MB, Freitas A, Madeira F, Gil V, Morais C. Utility of Pacemaker With Sleep Apnea Monitor to Predict Left Ventricular Overload and Acute Decompensated Heart Failure. Am J Cardiol 2019; 124:1720-1724. [PMID: 31606190 DOI: 10.1016/j.amjcard.2019.08.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/18/2019] [Accepted: 08/22/2019] [Indexed: 11/19/2022]
Abstract
Pacemakers with sleep apnea monitor (SAM) provide an easy tool to assess obstructive sleep apnea over long periods of time. The link between respiratory disturbances at night and the incidence of acute decompensated heart failure (ADHF) is not well established. We aimed at (1) determining the ability of SAM pacemakers to evaluate the extent of left ventricular overload and (2) assess the impact of respiratory disturbances at night on the occurrence of ADHF over 1-year of follow-up. We conducted a single-center prospective study. Consecutive patients with SAM pacemakers were comprehensively assessed. SAM automatically computes a respiratory disturbance index (RDI, apneas/hypopneas per hour - AH/h) in the previous night and the percentage of nights with RDI >20 AH/h in the previous 6 months. Thirty-seven patients were included (79.3 ± 11.2 years, 46% males). A high RDI in the previous night and a higher %nights with increased RDI were associated with increased NT-proBNP values (p = 0.008 and p = 0.013, respectively) and were the sole predictors of increased noninvasive pulmonary capillary wedge pressures (PCWP) in the morning of assessment (p = 0.031 and p = 0.044, respectively). Receiver operating characteristic curve analysis revealed an area under the curve of 0.804 (95% confidence interval 0.656 to 0.953, p = 0.002) for %nights with RDI >20 AH/h in the prediction of high PCWP. Patients with >12.5% of nights with RDI >20AH/h tended to have more ADHF during follow-up (log-rank p = 0.067). In conclusion, a high burden of apneas/hypopneas at night is associated with elevated NT-proBNP and PCWP values and an increased risk of ADHF over 1 year. These patients might benefit from early tailored clinical management.
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Affiliation(s)
- João B Augusto
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal; Institute of Cardiovascular Science, University College London, London, United Kingdom; Barts Heart Centre, St Bartholomew's Hospital, London, United Kingdom.
| | - Susana Antunes
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | | | - Daniel Faria
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - David Roque
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Marco Beringuilho
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Hilaryano Ferreira
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Inês Fialho
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Mariana Faustino
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Nuno Cabanelas
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Ana Rita Ferreira
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Hugo Vasconcelos
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Miguel Borges Santos
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - António Freitas
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Francisco Madeira
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
| | - Victor Gil
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal; Department of Cardiology, Hospital dos Lusíadas, Lisbon, Portugal
| | - Carlos Morais
- Department of Cardiology, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
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23
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Deng Y, Wang J, Xie G, Zeng X, Li H. Circ-HIPK3 Strengthens the Effects of Adrenaline in Heart Failure by MiR-17-3p - ADCY6 Axis. Int J Biol Sci 2019; 15:2484-2496. [PMID: 31595165 PMCID: PMC6775314 DOI: 10.7150/ijbs.36149] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/25/2019] [Indexed: 01/06/2023] Open
Abstract
Overactivation of β-adrenergic receptor (β-AR) can improve cardiac function temporarily but promotes the development and mortality of heart failure (HF) in the long run. CircRNA, a member of noncoding RNAs, can tolerate digestion of exonuclease and be a chronic stimulator to cell. But the relationship of circRNA with HF remains a puzzle and needs to be explored. Here, we found that circ-HIPK3 affected the concentration of Ca2+ in cytoplasm by miR-17-3p through ADCY6 (Adenylate cyclase type 6). The increase of ADCY6 caused by circ-HIPK3 was ameliorated by miR-17-3p overexpression and vice versa, implicating the existence of circ-HIPK3 - miR-17-3p - ADCY6 axis. And further assays showed that the level of circ-HIPK3 in heart was upregulated by adrenaline via transcription factor CREB1 (cAMP responsive element-binding protein 1). Experiments in vivo showed downregulation of circ-HIPK3 can alleviate fibrosis and maintain cardiac function post MI in mice. In conclusion, the increased circ-HIPK3 can be a helper for adrenaline but was harmful for heart in the long run and might be an ideal therapeutic target of HF.
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Affiliation(s)
- Yunfei Deng
- Department of Cardiology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jun Wang
- Department of Urology, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Guojin Xie
- Department of Clinical Laboratory, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Xiaochen Zeng
- Department of Clinical Laboratory, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Hongli Li
- Department of Cardiology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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24
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Morissette MP, Susser SE, Stammers AN, Moffatt TL, Wigle JT, Wigle TJ, Netticadan T, Premecz S, Jassal DS, O’Hara KA, Duhamel TA. Exercise-induced increases in the expression and activity of cardiac sarcoplasmic reticulum calcium ATPase 2 is attenuated in AMPKα2kinase-dead mice. Can J Physiol Pharmacol 2019; 97:786-795. [DOI: 10.1139/cjpp-2018-0737] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Exercise enhances cardiac sarcoplasmic reticulum Ca2+-ATPase 2a (SERCA2a) function through unknown mechanisms. The present study tested the hypothesis that the positive effects of exercise on SERCA2a expression and function in the left ventricle is dependent on adenosine-monophosphate-activated protein kinase (AMPK) α2 function. AMPKα2kinase-dead (KD) transgenic mice, which overexpress inactivated AMPKα2subunit, and wild-type C57Bl/6 (WT) mice were randomized into sedentary groups or groups with access to running wheels. After 5 months, exercised KD mice exhibited shortened deceleration time compared with sedentary KD mice. In left ventricular tissue, the ratio of phosphorylated AMPKαThr172:total AMPKα was 65% lower (P < 0.05) in KD mice compared with WT mice. The left ventricle of KD mice had 37% lower levels of SERCA2a compared with WT mice. Although exercise increased SERCA2a protein levels in WT mice by 53%, this response of exercise was abolished in exercised KD mice. Exercise training reduced total phospholamban protein content by 23% in both the WT and KD mice but remained 20% higher overall in KD mice. Collectively, these data suggest that AMPKα influences SERCA2a and phospholamban protein content in the sedentary and exercised heart, and that exercise-induced changes in SERCA2a protein are dependent on AMPKα function.
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Affiliation(s)
- Marc P. Morissette
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Health, Leisure, and Human Performance Research Institute, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Shanel E. Susser
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Health, Leisure, and Human Performance Research Institute, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Andrew N. Stammers
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Health, Leisure, and Human Performance Research Institute, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Teri L. Moffatt
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Health, Leisure, and Human Performance Research Institute, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Jeffrey T. Wigle
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R2E 3N4, Canada
| | - Theodore J. Wigle
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Health, Leisure, and Human Performance Research Institute, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Thomas Netticadan
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
- Agriculture and Agri-Food Canada, Winnipeg, MB R3C 3G7, Canada
| | - Sheena Premecz
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
| | - Davinder S. Jassal
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
- Section of Cardiology, Department of Internal Medicine, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3A 1R9, Canada
| | - Kimberley A. O’Hara
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Health, Leisure, and Human Performance Research Institute, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Todd A. Duhamel
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Health, Leisure, and Human Performance Research Institute, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
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Nanoscale reorganization of sarcoplasmic reticulum in pressure-overload cardiac hypertrophy visualized by dSTORM. Sci Rep 2019; 9:7867. [PMID: 31133706 PMCID: PMC6536555 DOI: 10.1038/s41598-019-44331-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 05/15/2019] [Indexed: 02/06/2023] Open
Abstract
Pathological cardiac hypertrophy is a debilitating condition characterized by deleterious thickening of the myocardium, dysregulated Ca2+ signaling within cardiomyocytes, and contractile dysfunction. Importantly, the nanoscale organization, localization, and patterns of expression of critical Ca2+ handling regulators including dihydropyridine receptor (DHPR), ryanodine receptor 2 (RyR2), phospholamban (PLN), and sarco/endoplasmic reticulum Ca2+-ATPase 2A (SERCA2A) remain poorly understood, especially during pathological hypertrophy disease progression. In the current study, we induced cardiac pathological hypertrophy via transverse aortic constriction (TAC) on 8-week-old CD1 mice, followed by isolation of cardiac ventricular myocytes. dSTORM super-resolution imaging was then used to visualize proteins at nanoscale resolution at two time points and we quantified changes in protein cluster properties using Voronoi tessellation and 2D Fast Fourier Transform analyses. We showed a decrease in the density of DHPR and RyR2 clusters with pressure-overload cardiac hypertrophy and an increase in the density of SERCA2A protein clusters. PLN protein clusters decreased in density in 2-week TAC but returned to sham levels by 4-week TAC. Furthermore, 2D-FFT analysis revealed changes in molecular organization during pathological hypertrophy, with DHPR and RyR2 becoming dispersed while both SERCA2A and PLN sequestered into dense clusters. Our work reveals molecular adaptations that occur in critical SR proteins at a single molecule during pressure overload-induced cardiomyopathy. Nanoscale alterations in protein localization and patterns of expression of crucial SR proteins within the cardiomyocyte provided insights into the pathogenesis of cardiac hypertrophy, and specific evidence that cardiomyocytes undergo significant structural remodeling during the progression of pathological hypertrophy.
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Warbrick I, Rabkin SW. Hypoxia-inducible factor 1-alpha (HIF-1α) as a factor mediating the relationship between obesity and heart failure with preserved ejection fraction. Obes Rev 2019; 20:701-712. [PMID: 30828970 DOI: 10.1111/obr.12828] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/31/2018] [Accepted: 08/02/2018] [Indexed: 12/17/2022]
Abstract
Heart failure with preserved ejection fraction (HFpEF), a common condition with an increased mortality, is strongly associated with obesity and the metabolic syndrome. The latter two conditions are associated with increased epicardial fat that can extend into the heart. This review advances the proposition that hypoxia-inhibitory factor-1α (HIF-1α) maybe a key factor producing HFpEF. HIF-1α, a highly conserved transcription factor that plays a key role in tissue response to hypoxia, is increased in adipose tissue in obesity. Increased HIF-1α expression leads to expression of a potent profibrotic transcriptional programme involving collagen I, III, IV, TIMP, and lysyl oxidase. The net effect is the formation of collagen fibres leading to fibrosis. HIF-1α is also responsible for recruiting M1 macrophages that mediate obesity-associated inflammation, releasing IL-6, MCP-1, TNF-α, and IL-1β with increased expression of thrombospondin, pro α2 (I) collagen, transforming growth factor β, NADPH oxidase, and connective tissue growth factor. These factors can accelerate cardiac fibrosis and impair cardiac diastolic function. Inhibition of HIF-1α expression in adipose tissue of mice fed a high-fat diet suppressed fibrosis and reduces inflammation in adipose tissue. Delineation of the role played by HIF-1α in obesity-associated HFpEF may lead to new potential therapies.
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Affiliation(s)
- Ian Warbrick
- Department of Medicine (Cardiology), University of British Columbia, Vancouver, Canada
| | - Simon W Rabkin
- Department of Medicine (Cardiology), University of British Columbia, Vancouver, Canada
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Warbrick I, Rabkin SW. Effect of the peptides Relaxin, Neuregulin, Ghrelin and Glucagon-like peptide-1, on cardiomyocyte factors involved in the molecular mechanisms leading to diastolic dysfunction and/or heart failure with preserved ejection fraction. Peptides 2019; 111:33-41. [PMID: 29807087 DOI: 10.1016/j.peptides.2018.05.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 05/19/2018] [Accepted: 05/22/2018] [Indexed: 02/08/2023]
Abstract
Heart failure with preserved ejection fraction (HFpEF) represents an important cardiac condition because of its increasing prevalence, resistance to treatment and high associated morbidity and mortality. Two of the major mechanisms responsible for HFpEF are impaired cardiomyocyte sarcoplasmic reticulum (SR) Ca2+ ATPase (SERCA2a), which is responsible for calcium reuptake into the SR, and cardiac fibroblasts/myofibroblasts that produce collagen or myocardial fibrosis. Phospholamban (PLB), in the SR and endoplasmic reticulum, is the primary regulator of SERCA2a in the heart and acts as a reversible inhibitor of SERCA2a. Glucagon-like peptide-1, a 30 amino acid peptide, improves diastolic function through increasing SERCA2a expression and activity as well as by decreasing phosphorylation of Ryanodine receptors. It also enhances collagen production through enhanced procollagen IalphaI/IIIalphaI, connective tissue growth factor, fibronectin, TGF-β3 as well as Interleukin -10, -1beta, and -6 gene expression. Relaxin-2, a two chain, 53 amino acid peptide, increases Ser16- and Thr17-phosphorylation levels of PLB, thereby relieving SERCA2a of its inhibition. H3 Relaxin inhibits TGF-β1-stimulated collagen deposition through H3 relaxin-induced increases in pSmad2. Neuregulin-1, an epidermal growth factor, induces nitric oxide and PI-3 kinase activation that enhance SERCA2 activity. Neuregulin-1 was associated with less myocardial macrophage infiltration and cytokine expression reducing collagen deposition. Ghrelin, a 28 amino acid peptide, improves SERCA2a function by inducing PLB phosphorylation. Ghrelin also reduces cardiac fibrosis. In summary, Glucagon-like peptide-1, Relaxin-2, Neuregulin-1, and Ghrelin each modify calcium dynamics, collagen expression, and myocardial fibrosis through attenuation of deleterious signaling cascades, and induction of adaptive pathways, representing potential therapeutic targets for HFpEF.
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Affiliation(s)
| | - Simon W Rabkin
- University of British Columbia, Canada; Department of Medicine (Cardiology), Canada.
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Williams AL, Walton CB, MacCannell KA, Avelar A, Shohet RV. HIF-1 regulation of miR-29c impairs SERCA2 expression and cardiac contractility. Am J Physiol Heart Circ Physiol 2018; 316:H554-H565. [PMID: 30575439 DOI: 10.1152/ajpheart.00617.2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The principal regulator of cellular response to low oxygen is hypoxia-inducible factor (HIF)-1, which is stabilized in several forms of heart failure. Our laboratory developed a mouse strain in which a stable form of HIF-1 can be inducibly expressed in cardiomyocytes. Strikingly, these mice show a rapid decrease in cardiac contractility and a rapid loss of SERCA2 protein, which is also seen in heart failure. Interestingly, while the SERCA2 transcript decreased, it did not fully account for the observed decrease in protein. We therefore investigated whether HIF-1-regulated microRNA could impair SERCA translation. Multiple screening analyses identified the microRNA miR-29c to be substantially upregulated upon HIF-1 induction and to have complementarity to SERCA, and therefore be a potential regulator of SERCA2 expression in hypoxia. Subsequent evaluation confirmed that miR-29c reduced SERCA2 expression and Ca2+ reuptake. Additionally, administration of an antagonist sequence (antimir) improved cardiac contractility and SERCA2 expression in HIF transgenic mice. To extend the significance of these findings, we examined miR-29c expression in physiological hypoxia. Surprisingly, miR-29c decreased in these settings. We also treated mice with antimir before infarction to see if further suppression of miR-29c could improve cardiac function. While no improvement in contractility or SERCA2 was observed, reduction of heart size after infarction indicated that the antimir could modulate cardiac physiology. These results demonstrate that while a HIF-1-regulated microRNA, miR-29c, can reduce SERCA2 expression and contractility, additional factors in the ischemic milieu may limit these effects. Efforts to develop miRNA-based therapies will need to explore and account for these additional countervailing effects. NEW & NOTEWORTHY Our study demonstrated hypoxia-inducible factor-1-dependent upregulation of miR-29c, which, in turn, inhibited SERCA2 expression and reduced cardiac contractility in a transgenic overexpression system. Interestingly, these results were not recapitulated in a murine myocardial infarction model. These results underscore the complexity of the pathological environment and highlight the need for therapeutic target validation in physiologically relevant models.
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Affiliation(s)
- Allison Lesher Williams
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Chad B Walton
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Keith A MacCannell
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Abigail Avelar
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Ralph V Shohet
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
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29
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Liu L, Zhao W, Liu J, Gan Y, Liu L, Tian J. Epigallocatechin-3 gallate prevents pressure overload-induced heart failure by up-regulating SERCA2a via histone acetylation modification in mice. PLoS One 2018; 13:e0205123. [PMID: 30286210 PMCID: PMC6171916 DOI: 10.1371/journal.pone.0205123] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 09/08/2018] [Indexed: 02/07/2023] Open
Abstract
Heart failure is a common, costly, and potentially fatal condition. The cardiac sarcoplasmic reticulum Ca-ATPase (SERCA2a) plays a critical role in the regulation of cardiac function. Previously, low SERCA2a expression was revealed in mice with heart failure. Epigallocatechin-3-gallate (EGCG) can function as an epigenetic regulator and has been reported to enhance cardiac function. However, the underlying epigenetic regulatory mechanism is still unclear. In this study, we investigated whether EGCG can up-regulate SERCA2a via histone acetylation and play role in preventing heart failure. For this, we generated a mouse model of heart failure by performing a minimally invasive transverse aortic constriction (TAC) operation and used this to test the effects of EGCG. The TAC+EGCG group showed nearly normal cardiac function compared to that in the SHAM group. The expression of SERCA2a was decreased at both the mRNA and protein levels in the TAC group but was enhanced in the TAC+EGCG group. Levels of AcH3 and AcH3K9 were determined to decrease near the promoter region of Atp2a2 (the gene encoding SERCA-2a) in the TAC group, but were elevated in the TAC+EGCG group. Meanwhile, HDAC1 activity and binding near the Atp2a2 promoter were increased in the TAC group but decreased with EGCG addition. Further, binding levels of GATA4 and Mef2c near the Atp2a2 promoter region were reduced in TAC hearts, which might have been caused by histone hypoacetylation; this was reversed by EGCG. Together, upregulation of SERCA2a via the modification of histone acetylation plays a role in EGCG-mediated prevention of pressure overload-induced heart failure, and this might represent a novel pharmacological target for the treatment of heart failure.
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Affiliation(s)
- Lifei Liu
- Department of Anesthesiology, Children’s Hospital of Chongqing Medical University, Chongqing, PR China
| | - Weian Zhao
- Department of Cardiology, Heart Center, Children's Hospital of Chongqing Medical University, Chongqing, PR China
| | - Jianxia Liu
- Department of Anesthesiology, Children’s Hospital of Chongqing Medical University, Chongqing, PR China
| | - Yi Gan
- Ministry of Education Key Laboratory of Child Development and Disorders, PR China
| | - Lingjuan Liu
- Key Laboratory of Pediatrics in Chongqing, Chongqing, PR China
- Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, PR China
| | - Jie Tian
- Department of Cardiology, Heart Center, Children's Hospital of Chongqing Medical University, Chongqing, PR China
- * E-mail:
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30
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Kano N, Okumura T, Isobe S, Sawamura A, Watanabe N, Fukaya K, Mori H, Morimoto R, Kato K, Bando YK, Murohara T. Left ventricular phase entropy: Novel prognostic predictor in patients with dilated cardiomyopathy and narrow QRS. J Nucl Cardiol 2018; 25:1677-1687. [PMID: 28176257 DOI: 10.1007/s12350-017-0807-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 01/17/2017] [Indexed: 10/20/2022]
Abstract
BACKGROUND The prognostic impact and pathophysiology of global left ventricular mechanical dyssynchrony (LVMD), namely mechanical dyssynchrony of whole left ventricle, as assessed by phase analysis of electrocardiographically gated (ECG-gated) myocardial perfusion SPECT has not been clearly elucidated in patients with dilated cardiomyopathy (DCM) and narrow QRS complex (<120 ms). METHODS AND RESULTS Forty-six patients with DCM underwent ECG-gated myocardial 99mTc-sestamibi perfusion SPECT and endomyocardial biopsy. LV phase entropy was automatically calculated using a phase analysis of ECG-gated myocardial perfusion SPECT. The patients were divided into two groups according to the median phase entropy value: low-phase entropy (<0.61) (N = 23: LE group) and high-phase entropy (≥0.61) (N = 23: HE group). In the Kaplan-Meier survival analysis, the event-free survival rate was significantly lower in the HE group (log-rank P = 0.015). Moreover, high-phase entropy was an independent predictor of adverse cardiac events (hazard ratio, 5.77%; 95% confidence interval, 1.02-108.32; P = 0.047). Interestingly, the mRNA expression levels of sarcoplasmic reticulum Ca2+-ATPase (SERCA2a) in endomyocardial biopsy specimens were significantly lower in the HE group (P = 0.015). CONCLUSION LV phase entropy, which may reflect impairment of Ca2+ handling caused by decreased SERCA2a mRNA levels, is a novel prognostic predictor in patients with DCM and narrow QRS complex.
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Affiliation(s)
- Naoaki Kano
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Takahiro Okumura
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan.
| | - Satoshi Isobe
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Akinori Sawamura
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Naoki Watanabe
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Kenji Fukaya
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Hiroaki Mori
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Ryota Morimoto
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
- Department of CKD Initiatives Internal Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Katsuhiko Kato
- Department of Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasuko K Bando
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
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31
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Activation of CaMKIIδA promotes Ca 2+ leak from the sarcoplasmic reticulum in cardiomyocytes of chronic heart failure rats. Acta Pharmacol Sin 2018; 39:1604-1612. [PMID: 29900930 DOI: 10.1038/aps.2018.20] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 02/19/2018] [Indexed: 12/14/2022] Open
Abstract
Activation of the Ca2+/calmodulin-dependent protein kinase II isoform δA (CaMKIIδA) disturbs intracellular Ca2+ homeostasis in cardiomyocytes during chronic heart failure (CHF). We hypothesized that upregulation of CaMKIIδA in cardiomyocytes might enhance Ca2+ leak from the sarcoplasmic reticulum (SR) via activation of phosphorylated ryanodine receptor type 2 (P-RyR2) and decrease Ca2+ uptake by inhibition of SR calcium ATPase 2a (SERCA2a). In this study, CHF was induced in rats by ligation of the left anterior descending coronary artery. We found that CHF caused an increase in the expression of CaMKIIδA and P-RyR2 in the left ventricle (LV). The role of CaMKIIδA in regulation of P-RyR2 was elucidated in cardiomyocytes isolated from neonatal rats in vitro. Hypoxia induced upregulation of CaMKIIδA and activation of P-RyR2 in the cardiomyocytes, which both were attenuated by knockdown of CaMKIIδA. Furthermore, we showed that knockdown of CaMKIIδA significantly decreased the Ca2+ leak from the SR elicited by hypoxia in the cardiomyocytes. In addition, CHF also induced a downregulation of SERCA2a in the LV of CHF rats. Knockdown of CaMKIIδA normalized hypoxia-induced downregulation of SERCA2a in cardiomyocytes in vitro. The results demonstrate that the inhibition of CaMKIIδA may improve cardiac function by preventing SR Ca2+ leak through downregulation of P-RyR2 and upregulation of SERCA2a expression in cardiomyocytes in CHF.
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32
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Vinogradova TM, Tagirova Sirenko S, Lakatta EG. Unique Ca 2+-Cycling Protein Abundance and Regulation Sustains Local Ca 2+ Releases and Spontaneous Firing of Rabbit Sinoatrial Node Cells. Int J Mol Sci 2018; 19:ijms19082173. [PMID: 30044420 PMCID: PMC6121616 DOI: 10.3390/ijms19082173] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 07/20/2018] [Accepted: 07/23/2018] [Indexed: 11/16/2022] Open
Abstract
Spontaneous beating of the heart pacemaker, the sinoatrial node, is generated by sinoatrial node cells (SANC) and caused by gradual change of the membrane potential called diastolic depolarization (DD). Submembrane local Ca2+ releases (LCR) from sarcoplasmic reticulum (SR) occur during late DD and activate an inward Na+/Ca2+ exchange current, which accelerates the DD rate leading to earlier occurrence of an action potential. A comparison of intrinsic SR Ca2+ cycling revealed that, at similar physiological Ca2+ concentrations, LCRs are large and rhythmic in permeabilized SANC, but small and random in permeabilized ventricular myocytes (VM). Permeabilized SANC spontaneously released more Ca2+ from SR than VM, despite comparable SR Ca2+ content in both cell types. In this review we discuss specific patterns of expression and distribution of SR Ca2+ cycling proteins (SR Ca2+ ATPase (SERCA2), phospholamban (PLB) and ryanodine receptors (RyR)) in SANC and ventricular myocytes. We link ability of SANC to generate larger and rhythmic LCRs with increased abundance of SERCA2, reduced abundance of the SERCA inhibitor PLB. In addition, an increase in intracellular [Ca2+] increases phosphorylation of both PLB and RyR exclusively in SANC. The differences in SR Ca2+ cycling protein expression between SANC and VM provide insights into diverse regulation of intrinsic SR Ca2+ cycling that drives automaticity of SANC.
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Affiliation(s)
- Tatiana M Vinogradova
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Blvd, Room 8B-123, Baltimore, MD 21224, USA.
| | - Syevda Tagirova Sirenko
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Blvd, Room 8B-123, Baltimore, MD 21224, USA.
| | - Edward G Lakatta
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Blvd, Room 8B-123, Baltimore, MD 21224, USA.
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Buyuklu M, Kandemir FM, Set T, Bakırcı EM, Degirmenci H, Hamur H, Topal E, Kucukler S, Turkmen K. Beneficial Effects of Ozone Therapy on Oxidative Stress, Cardiac Functions and Clinical Findings in Patients with Heart Failure Reduced Ejection Fraction. Cardiovasc Toxicol 2018; 17:426-433. [PMID: 28097518 DOI: 10.1007/s12012-017-9400-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The aim of study was to determine the effects of ozone therapy on the oxidative stress, cardiac functions and clinical findings in patients with heart failure reduced ejection fraction (HFrEF). A total of 40 patients with New York Heart Association 2 and 3 HF with left ventricular ejection fraction (LVEF) <35%, and 40 subjects without HF as control group were included in the study. Patients with HFrEF were given additional ozone therapy of major and minor administrations along with conventional HF treatment for 5 weeks. Before and after ozone therapy, left ventricular end-systolic and end-diastolic volumes (LVESV, LVEDV) and the 6 minute walk distance (6MWD) and blood levels of the superoxide dismutase (SOD), catalase (CAT), glutathione (GSH), glutathione peroxidase (GSHPx), malondialdehyde (MDA), nitric oxide (NO) and N-terminal pro-brain natriuretic peptide (NT-proBNP) were measured. Ozone therapy significantly reduced the serum levels of NO and MDA (p < 0.001, respectively) and significantly increased the levels of SOD, CAT, GSH and GSHPx (p < 0.001, respectively). LVEDV and LVESV were found to be significantly reduced; however, LVEF was not found to be significantly increased (p = 0.567). As the biochemical improvement marker of HF, NT-proBNP was significantly reduced (p < 0.001). The clinical HF improvement marker of 6 minute walk distance was also modestly increased (p < 0.001). Ozone therapy might be beneficial in terms of activating antioxidant system and merit further therapeutic potential to conventional HF treatment in patients with HFrEF.
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Affiliation(s)
- Mutlu Buyuklu
- Department of Cardiology, Faculty of Medicine, Erzincan University, 24500, Erzincan, Turkey.
| | - Fatih Mehmet Kandemir
- Department of Biochemistry, Faculty of Veterinary Medicine, Atatürk University, 25000, Erzurum, Turkey
| | - Turan Set
- Department of Family Physician, Faculty of Medicine, Karadeniz Technical University, 61000, Trabzon, Turkey
| | - Eftal Murat Bakırcı
- Department of Cardiology, Faculty of Medicine, Erzincan University, 24500, Erzincan, Turkey
| | - Husnu Degirmenci
- Department of Cardiology, Faculty of Medicine, Erzincan University, 24500, Erzincan, Turkey
| | - Hikmet Hamur
- Department of Cardiology, Faculty of Medicine, Erzincan University, 24500, Erzincan, Turkey
| | - Ergun Topal
- Department of Cardiology, Faculty of Medicine, Erzincan University, 24500, Erzincan, Turkey
| | - Sefa Kucukler
- Department of Biochemistry, Faculty of Veterinary Medicine, Atatürk University, 25000, Erzurum, Turkey
| | - Kultigin Turkmen
- Division of Nephrology, Department of Internal Medicine, Faculty of Medicine, Necmettin Erbakan University, 42000, Konya, Turkey
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Theory of frequency response of mechanically driven cardiomyocytes. Sci Rep 2018; 8:2237. [PMID: 29396531 PMCID: PMC5797104 DOI: 10.1038/s41598-018-20307-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 01/16/2018] [Indexed: 11/08/2022] Open
Abstract
We theoretically predict and compare with experiments, transitions from spontaneous beating to dynamical entrainment of cardiomyocytes induced by an oscillating, external mechanical probe. In accord with recent experiments, we predict the dynamical behavior as a function of the probe amplitude and frequency. The theory is based on a phenomenological model for a non-linear oscillator, motivated by acto-myosin contractility. The generic behavior is independent of the detailed, molecular origins of the dynamics and, consistent with experiment, we find three regimes: spontaneous beating with the natural frequency of the cell, entrained beating with the frequency of the probe, and a “bursting” regime where the two frequencies alternate in time. We quantitatively predict the properties of the “bursting” regime as a function of the amplitude and frequency of the probe. Furthermore, we examine the pacing process in the presence of weak noise and explain how this might relate to cardiomyocyte physiology.
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Krishnan B, Massilamany C, Basavalingappa RH, Gangaplara A, Rajasekaran RA, Afzal MZ, Khalilzad-Sharghi V, Zhou Y, Riethoven JJ, Nandi SS, Mishra PK, Sobel RA, Strande JL, Steffen D, Reddy J. Epitope Mapping of SERCA2a Identifies an Antigenic Determinant That Induces Mainly Atrial Myocarditis in A/J Mice. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2018; 200:523-537. [PMID: 29229678 PMCID: PMC5760440 DOI: 10.4049/jimmunol.1701090] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 11/05/2017] [Indexed: 12/20/2022]
Abstract
Sarcoplasmic/endoplasmic reticulum Ca2+ adenosine triphosphatase (SERCA)2a, a critical regulator of calcium homeostasis, is known to be decreased in heart failure. Patients with myocarditis or dilated cardiomyopathy develop autoantibodies to SERCA2a suggesting that they may have pathogenetic significance. In this report, we describe epitope mapping analysis of SERCA2a in A/J mice that leads us to make five observations: 1) SERCA2a contains multiple T cell epitopes that induce varying degrees of myocarditis. One epitope, SERCA2a 971-990, induces widespread atrial inflammation without affecting noncardiac tissues; the cardiac abnormalities could be noninvasively captured by echocardiography, electrocardiography, and magnetic resonance microscopy imaging. 2) SERCA2a 971-990-induced disease was associated with the induction of CD4 T cell responses and the epitope preferentially binds MHC class II/IAk rather than IEk By creating IAk/and IEk/SERCA2a 971-990 dextramers, the T cell responses were determined by flow cytometry to be Ag specific. 3) SERCA2a 971-990-sensitized T cells produce both Th1 and Th17 cytokines. 4) Animals immunized with SERCA2a 971-990 showed Ag-specific Abs with enhanced production of IgG2a and IgG2b isotypes, suggesting that SERCA2a 971-990 can potentially act as a common epitope for both T cells and B cells. 5) Finally, SERCA2a 971-990-sensitized T cells were able to transfer disease to naive recipients. Together, these data indicate that SERCA2a is a critical autoantigen in the mediation of atrial inflammation in mice and that our model may be helpful to study the inflammatory events that underlie the development of conditions such as atrial fibrillation in humans.
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Affiliation(s)
- Bharathi Krishnan
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Chandirasegaran Massilamany
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583
- Vaccine Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892
| | - Rakesh H Basavalingappa
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Arunakumar Gangaplara
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Rajkumar A Rajasekaran
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583
| | | | - Vahid Khalilzad-Sharghi
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - You Zhou
- Center for Biotechnology, University of Nebraska-Lincoln, Lincoln, NE 68588
| | | | - Shyam S Nandi
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198; and
| | - Paras K Mishra
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198; and
| | - Raymond A Sobel
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94304
| | | | - David Steffen
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Jay Reddy
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583;
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Silveira CFSMP, Campos DHS, Freire PP, Deus AF, Okoshi K, Padovani CR, Cicogna AC. Importance of SERCA2a on early isolated diastolic dysfunction induced by supravalvular aortic stenosis in rats. ACTA ACUST UNITED AC 2017; 50:e5742. [PMID: 28423119 PMCID: PMC5441282 DOI: 10.1590/1414-431x20175742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 02/10/2017] [Indexed: 01/19/2023]
Abstract
Cardiac remodeling is defined as changes in shape and function of the heart in response to aggression (pressure overload). The sarcoplasmic reticulum calcium ATPase cardiac isoform 2a (SERCA2a) is a known factor that influences function. A wide spectrum of studies report a decrease in SERCA2a in heart failure, but none evaluate it's the role in early isolated diastolic dysfunction in supravalvular aortic stenosis (AoS). Our hypothesis was that SERCA2a participates in such dysfunction. Thirty-day-old male Wistar rats (60-80 g) were divided into AoS and Sham groups, which were submitted to surgery with or without aorta clipping, respectively. After 6 weeks, the animals were submitted to echocardiogram and functional analysis by isolated papillary muscle (IPM) in basal condition, hypoxia, and SERCA2a blockage with cyclopiazonic acid at calcium concentrations of 0.5, 1.5, and 2.5 mM. Western-blot analyses were used for SERCA2a and phospholamban detection. Data analysis was carried out with Student's t-test and ANOVA. AoS enhanced left atrium and E and A wave ratio, with preserved ejection fraction. Basal condition in IPM showed similar increases in developed tension (DT) and resting tension (RT) in AoS, and hypoxia was similar between groups. After cyclopiazonic acid blockage, final DT was equally decreased and RT was similar between groups, but the speed of relaxation was decreased in the AoS group. Western-blot was uniform in all evaluations. The hypothesis was confirmed, since functional parameters regarding SERCA2a were changed in the AoS group.
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Affiliation(s)
- C F S M P Silveira
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - D H S Campos
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - P P Freire
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - A F Deus
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - K Okoshi
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - C R Padovani
- Departamento de Bioestatística, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - A C Cicogna
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
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Abu-Omar N, Das J, Szeto V, Feng ZP. Neuronal Ryanodine Receptors in Development and Aging. Mol Neurobiol 2017; 55:1183-1192. [DOI: 10.1007/s12035-016-0375-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 12/28/2016] [Indexed: 01/09/2023]
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Abstract
Heart failure with reduced ejection fraction (HFrEF) develops when cardiac output falls as a result of cardiac injury. The most well-recognized of the compensatory homeostatic responses to a fall in cardiac output are activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS). In the short term, these 'neurohormonal' systems induce a number of changes in the heart, kidneys, and vasculature that are designed to maintain cardiovascular homeostasis. However, with chronic activation, these responses result in haemodynamic stress and exert deleterious effects on the heart and the circulation. Neurohormonal activation is now known to be one of the most important mechanisms underlying the progression of heart failure, and therapeutic antagonism of neurohormonal systems has become the cornerstone of contemporary pharmacotherapy for heart failure. In this Review, we discuss the effects of neurohormonal activation in HFrEF and highlight the mechanisms by which these systems contribute to disease progression.
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Kalbitz M, Fattahi F, Herron TJ, Grailer JJ, Jajou L, Lu H, Huber-Lang M, Zetoune FS, Sarma JV, Day SM, Russell MW, Jalife J, Ward PA. Complement Destabilizes Cardiomyocyte Function In Vivo after Polymicrobial Sepsis and In Vitro. THE JOURNAL OF IMMUNOLOGY 2016; 197:2353-61. [PMID: 27521340 DOI: 10.4049/jimmunol.1600091] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 07/06/2016] [Indexed: 01/12/2023]
Abstract
There is accumulating evidence during sepsis that cardiomyocyte (CM) homeostasis is compromised, resulting in cardiac dysfunction. An important role for complement in these outcomes is now demonstrated. Addition of C5a to electrically paced CMs caused prolonged elevations of intracellular Ca(2+) concentrations during diastole, together with the appearance of spontaneous Ca(2+) transients. In polymicrobial sepsis in mice, we found that three key homeostasis-regulating proteins in CMs were reduced: Na(+)/K(+)-ATPase, which is vital for effective action potentials in CMs, and two intracellular Ca(2+) concentration regulatory proteins, that is, sarcoplasmic/endoplasmic reticulum calcium ATPase 2 and the Na(+)/Ca(2+) exchanger. Sepsis caused reduced mRNA levels and reductions in protein concentrations in CMs for all three proteins. The absence of either C5a receptor mitigated sepsis-induced reductions in the three regulatory proteins. Absence of either C5a receptor (C5aR1 or C5aR2) diminished development of defective systolic and diastolic echocardiographic/Doppler parameters developing in the heart (cardiac output, left ventricular stroke volume, isovolumic relaxation, E' septal annulus, E/E' septal annulus, left ventricular diastolic volume). We also found in CMs from septic mice the presence of defective current densities for Ik1, l-type calcium channel, and Na(+)/Ca(2+) exchanger. These defects were accentuated in the copresence of C5a. These data suggest complement-related mechanisms responsible for development of cardiac dysfunction during sepsis.
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Affiliation(s)
- Miriam Kalbitz
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109; Department of Orthopedic Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital of Ulm, 89081 Ulm, Germany
| | - Fatemeh Fattahi
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Todd J Herron
- Division of Cardiovascular Research, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109; Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Jamison J Grailer
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Lawrence Jajou
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Hope Lu
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Markus Huber-Lang
- Department of Orthopedic Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital of Ulm, 89081 Ulm, Germany
| | - Firas S Zetoune
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - J Vidya Sarma
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Sharlene M Day
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109; Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109; Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Mark W Russell
- Department of Pediatric Cardiology, University of Michigan Medical School, Ann Arbor, MI 48109; and Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, MI 48109
| | - José Jalife
- Division of Cardiovascular Research, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109; Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Peter A Ward
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109;
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Roselló-Lletí E, Tarazón E, Ortega A, Gil-Cayuela C, Carnicer R, Lago F, González-Juanatey JR, Portolés M, Rivera M. Protein Inhibitor of NOS1 Plays a Central Role in the Regulation of NOS1 Activity in Human Dilated Hearts. Sci Rep 2016; 6:30902. [PMID: 27481317 PMCID: PMC4969592 DOI: 10.1038/srep30902] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/08/2016] [Indexed: 12/22/2022] Open
Abstract
An essential factor for the production of nitric oxide by nitric oxide synthase 1 (NOS1), major modulator of cardiac function, is the cofactor tetrahydrobiopterin (BH4). BH4 is regulated by GTP cyclohydrolase 1, the rate-limiting enzyme in BH4 biosynthesis which catalyses the formation of dihydroneopterin 3'triphosfate from GTP, producing BH4 after two further steps catalyzed by 6-pyruvoyltetrahydropterin synthase and sepiapterin reductase. However, there are other essential factors involved in the regulation of NOS1 activity, such as protein inhibitor of NOS1 (PIN), calmodulin, heat shock protein 90, and NOS interacting protein. All these molecules have never been analysed in human non-ischemic dilated hearts (DCM). In this study we demonstrated that the upregulation of cardiac NOS1 is not accompanied by increased NOS1 activity in DCM, partly due to the elevated PIN levels and not because of alterations in biopterin biosynthesis. Notably, the PIN concentration was significantly associated with impaired ventricular function, highlighting the importance of this NOS1 activity inhibitor in Ca(2+) homeostasis. These results take a central role in the current list of targets for future studies focused on the complex cardiac dysfunction processes through more efficient harnessing of NOS1 signalling.
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Affiliation(s)
- Esther Roselló-Lletí
- Cardiocirculatory Unit, Health Research Institute Hospital La Fe (IIS La Fe), Valencia, Spain
| | - Estefanía Tarazón
- Cardiocirculatory Unit, Health Research Institute Hospital La Fe (IIS La Fe), Valencia, Spain
| | - Ana Ortega
- Cardiocirculatory Unit, Health Research Institute Hospital La Fe (IIS La Fe), Valencia, Spain
| | - Carolina Gil-Cayuela
- Cardiocirculatory Unit, Health Research Institute Hospital La Fe (IIS La Fe), Valencia, Spain
| | - Ricardo Carnicer
- Department of Cardiovascular Medicine, University of Oxford, United Kingdom
| | - Francisca Lago
- Cellular and Molecular Cardiology Research Unit, Department of Cardiology and Institute of Biomedical Research, University Clinical Hospital, Santiago de Compostela, Spain
| | - Jose Ramón González-Juanatey
- Cellular and Molecular Cardiology Research Unit, Department of Cardiology and Institute of Biomedical Research, University Clinical Hospital, Santiago de Compostela, Spain
| | - Manuel Portolés
- Cardiocirculatory Unit, Health Research Institute Hospital La Fe (IIS La Fe), Valencia, Spain
| | - Miguel Rivera
- Cardiocirculatory Unit, Health Research Institute Hospital La Fe (IIS La Fe), Valencia, Spain
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Tsigkas G, Katsanos K, Apostolakis E, Papadimitriou E, Koutsioumpa M, Kagadis GC, Koumoundourou D, Hahalis G, Alexopoulos D. A minimally invasive endovascular rabbit model for experimental induction of progressive myocardial hypertrophy. Hypertens Res 2016; 39:840-847. [DOI: 10.1038/hr.2016.66] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 05/10/2016] [Accepted: 05/19/2016] [Indexed: 01/30/2023]
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Dema A, Perets E, Schulz MS, Deák VA, Klussmann E. Pharmacological targeting of AKAP-directed compartmentalized cAMP signalling. Cell Signal 2015; 27:2474-87. [PMID: 26386412 DOI: 10.1016/j.cellsig.2015.09.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 09/08/2015] [Accepted: 09/14/2015] [Indexed: 01/26/2023]
Abstract
The second messenger cyclic adenosine monophosphate (cAMP) can bind and activate protein kinase A (PKA). The cAMP/PKA system is ubiquitous and involved in a wide array of biological processes and therefore requires tight spatial and temporal regulation. Important components of the safeguard system are the A-kinase anchoring proteins (AKAPs), a heterogeneous family of scaffolding proteins defined by its ability to directly bind PKA. AKAPs tether PKA to specific subcellular compartments, and they bind further interaction partners to create local signalling hubs. The recent discovery of new AKAPs and advances in the field that shed light on the relevance of these hubs for human disease highlight unique opportunities for pharmacological modulation. This review exemplifies how interference with signalling, particularly cAMP signalling, at such hubs can reshape signalling responses and discusses how this could lead to novel pharmacological concepts for the treatment of disease with an unmet medical need such as cardiovascular disease and cancer.
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Affiliation(s)
- Alessandro Dema
- Max Delbrück Center for Molecular Medicine Berlin in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Ekaterina Perets
- Max Delbrück Center for Molecular Medicine Berlin in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Maike Svenja Schulz
- Max Delbrück Center for Molecular Medicine Berlin in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Veronika Anita Deák
- Max Delbrück Center for Molecular Medicine Berlin in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Enno Klussmann
- Max Delbrück Center for Molecular Medicine Berlin in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125 Berlin, Germany; DZHK, German Centre for Cardiovascular Research, Oudenarder Straße 16, 13347 Berlin, Germany.
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43
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Matsushima S, Sadoshima J. The role of sirtuins in cardiac disease. Am J Physiol Heart Circ Physiol 2015; 309:H1375-89. [PMID: 26232232 DOI: 10.1152/ajpheart.00053.2015] [Citation(s) in RCA: 236] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 07/27/2015] [Indexed: 12/25/2022]
Abstract
Modification of histones is one of the important mechanisms of epigenetics, in which genetic control is determined by factors other than an individual's DNA sequence. Sirtuin family proteins, which are class III histone deacetylases, were originally identified as gene silencers that affect the mating type of yeast, leading to the name "silent mating-type information regulation 2" (SIR2). They are characterized by their requirement of nicotinamide adenine dinucleotide for their enzyme activity, unlike other classes of histone deacetylases. Sirtuins have been traditionally linked to longevity and the beneficial effects of calorie restriction and DNA damage repair. Recently, sirtuins have been shown to be involved in a wide range of physiological and pathological processes, including aging, energy responses to low calorie availability, and stress resistance, as well as apoptosis and inflammation. Sirtuins can also regulate mitochondrial biogenesis and circadian clocks. Seven sirtuin family proteins (Sirt1-7) have been identified as mammalian SIR2 orthologs, localized in different subcellular compartments, namely, the cytoplasm (Sirt1, 2), the mitochondria (Sirt3, 4, 5), and the nucleus (Sirt1, 2, 6, 7). Sirt1 is evolutionarily close to yeast SIR2 and has been the most intensively investigated in the cardiovascular system. Endogenous Sirt1 plays a pivotal role in mediating the cell death/survival process and has been implicated in the pathogenesis of cardiovascular disease. Downregulation of Sirt2 is protective against ischemic-reperfusion injury. Increased Sirt3 expression has been shown to correlate with longevity in humans. In addition, Sirt3 protects cardiomyocytes from aging and oxidative stress and suppresses cardiac hypertrophy. Sirt6 has also recently been demonstrated to attenuate cardiac hypertrophy, and Sirt7 is known to regulate apoptosis and stress responses in the heart. On the other hand, the roles of Sirt4 and Sirt5 in the heart remain largely uncharacterized.
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Affiliation(s)
- Shouji Matsushima
- Department of Cell Biology and Molecular Medicine, Cardiovascular Research Institute, Rutgers New Jersey Medical School, Newark, New Jersey; and Department of Cardiovascular Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Junichi Sadoshima
- Department of Cell Biology and Molecular Medicine, Cardiovascular Research Institute, Rutgers New Jersey Medical School, Newark, New Jersey; and
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Elshrif MM, Shi P, Cherry EM. Representing variability and transmural differences in a model of human heart failure. IEEE J Biomed Health Inform 2015; 19:1308-20. [PMID: 26068919 DOI: 10.1109/jbhi.2015.2442833] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
During heart failure (HF) at the cellular level, the electrophysiological properties of single myocytes get remodeled, which can trigger the occurrence of ventricular arrhythmias that could be manifested in many forms such as early afterdepolarizations (EADs) and alternans (ALTs). In this paper, based on experimentally observed human HF data, specific ionic and exchanger current strengths are modified from a recently developed human ventricular cell model: the O'Hara-Virág-Varró-Rudy (OVVR) model. A new transmural HF-OVVR model is developed that incorporates HF changes and variability of the observed remodeling. This new heterogeneous HF-OVVR model is able to replicate many of the failing action potential (AP) properties and the dynamics of both [Ca(2+)]i and [Na(+)]i in accordance with experimental data. Moreover, it is able to generate EADs for different cell types and exhibits ALTs at modest pacing rate for transmural cell types. We have assessed the HF-OVVR model through the examination of the AP duration and the major ionic currents' rate dependence in single myocytes. The evaluation of the model comes from utilizing the steady-state (S-S) and S1-S2 restitution curves and from probing the accommodation of the HF-OVVR model to an abrupt change in cycle length. In addition, we have investigated the effect of chosen currents on the AP properties, such as blocking the slow sodium current to shorten the AP duration and suppress the EADs, and have found good agreement with experimental observations. This study should help elucidate arrhythmogenic mechanisms at the cellular level and predict unseen properties under HF conditions. In addition, this AP cell model might be useful for modeling and simulating HF at the tissue and organ levels.
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Castillero E, Akashi H, Pendrak K, Yerebakan H, Najjar M, Wang C, Naka Y, Mancini D, Sweeney HL, D Armiento J, Ali ZA, Schulze PC, George I. Attenuation of the unfolded protein response and endoplasmic reticulum stress after mechanical unloading in dilated cardiomyopathy. Am J Physiol Heart Circ Physiol 2015; 309:H459-70. [PMID: 26055788 DOI: 10.1152/ajpheart.00056.2015] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 05/28/2015] [Indexed: 11/22/2022]
Abstract
Abnormal intracellular calcium (Ca(2+)) handling can trigger endoplasmic reticulum (ER) stress, leading to activation of the unfolded protein response (UPR) in an attempt to prevent cell death. Mechanical unloading with a left ventricular assist device (LVAD) relieves pressure-volume overload and promotes reverse remodeling of the failing myocardium. We hypothesized that mechanical unloading would alter the UPR in patients with advanced heart failure (HF). UPR was analyzed in paired myocardial tissue from 10 patients with dilated cardiomyopathy obtained during LVAD implantation and explantation. Samples from healthy hearts served as controls. Markers of UPR [binding immunoglobulin protein (BiP), phosphorylated (P-) eukaryotic initiation factor (eIF2α), and X-box binding protein (XBP1)] were significantly increased in HF, whereas LVAD support significantly decreased BiP, P-eIF2α, and XBP1s levels. Apoptosis as reflected by C/EBP homologous protein and DNA damage were also significantly reduced after LVAD support. Improvement in left ventricular dimensions positively correlated with P-eIF2α/eIF2α and apoptosis level recovery. Furthermore, significant dysregulation of calcium-handling proteins [P-ryanodine receptor, Ca(2+) storing protein calsequestrin, Na(+)-Ca(2+) exchanger, sarcoendoplasmic reticulum Ca(2+)-ATPase (SERCA2a), ER chaperone protein calreticulin] was normalized after LVAD support. Reduced ER Ca(2+) content as a causative mechanism for UPR was confirmed using AC16 cells treated with a calcium ionophore (A23187) and SERCA2a inhibitor (thapsigargin). UPR activation and apoptosis are reduced after mechanical unloading, which may be mediated by the improvement of Ca(2+) handling in patients with advanced HF. These changes may impact the potential for myocardial recovery.
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Affiliation(s)
- Estibaliz Castillero
- Division of Cardiothoracic Surgery, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York
| | - Hirokazu Akashi
- Division of Cardiothoracic Surgery, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York
| | - Klara Pendrak
- Department of Physiology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Halit Yerebakan
- Division of Cardiothoracic Surgery, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York
| | - Marc Najjar
- Division of Cardiothoracic Surgery, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York
| | - Catherine Wang
- Division of Cardiothoracic Surgery, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York
| | - Yoshifumi Naka
- Division of Cardiothoracic Surgery, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York
| | - Donna Mancini
- Division of Cardiology, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York; and
| | - H Lee Sweeney
- Department of Physiology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jeanine D Armiento
- Department of Anesthesiology, Physiology and Cellular Biophysics, College of Physicians and Surgeons of Columbia University, New York, New York
| | - Ziad A Ali
- Division of Cardiology, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York; and
| | - P Christian Schulze
- Division of Cardiology, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York; and
| | - Isaac George
- Division of Cardiothoracic Surgery, New York Presbyterian Hospital - College of Physicians and Surgeons of Columbia University, New York, New York;
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Stein AB, Goonewardena SN, Jones TA, Prusick PJ, Bazzi AA, Belyavskaya JM, McCoskey MM, Dandar RA. The PTIP-Associated Histone Methyltransferase Complex Prevents Stress-Induced Maladaptive Cardiac Remodeling. PLoS One 2015; 10:e0127839. [PMID: 26001054 PMCID: PMC4441468 DOI: 10.1371/journal.pone.0127839] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 04/20/2015] [Indexed: 12/31/2022] Open
Abstract
Pressure overload induces stress-induced signaling pathways and a coordinated transcriptional response that begets concentric cardiac hypertrophy. Although concentric hypertrophy initially attenuates wall stress and maintains cardiac function, continued stress can result in maladaptive cardiac remodeling. Cardiac remodeling is orchestrated by transcription factors that act within the context of an epigenetic landscape. Since the epigenetic landscape serves as a molecular link between environmental factors (stress) and cellular phenotype (disease), defining the role of the epigenome in the development and progression of cardiac remodeling could lead to new therapeutic approaches. In this study, we hypothesized that the epigenetic landscape is important in the development of cardiac hypertrophy and the progression to maladaptive remodeling. To demonstrate the importance of the epigenome in HF, we targeted the PTIP-associated histone methyltransferase complex in adult cardiac myocytes. This complex imparts histone H3 lysine 4 (H3K4) methylation marks at actively expressed genes. We subjected PTIP null (PTIP-) mice to 2 weeks of transverse aortic constriction, a stress that induces concentric hypertrophy in control mice (PTIP+). PTIP- mice have a maladaptive response to 2wk of transverse aortic constriction (TAC)-induced pressure overload characterized by cardiac dilatation, decreased LV function, cardiac fibrosis, and increased cell death. PTIP deletion resulted in altered stress-induced gene expression profiles including blunted expression of ADRA1A, ADRA1B, JUN, ATP2A2, ATP1A2, SCN4B, and CACNA1G. These results suggest that H3K4 methylation patterns and the complexes that regulate them, specifically the PTIP-associated HMT, are necessary for the adaptive response to TAC.
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Affiliation(s)
- Adam B. Stein
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, United States of America
- * E-mail:
| | - Sascha N. Goonewardena
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, United States of America
| | - Thomas A. Jones
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, United States of America
| | - Parker J. Prusick
- Central Michigan University College of Medicine, Mt. Pleasant, MI, 48859, United States of America
| | - Ahmad A. Bazzi
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, United States of America
| | - Jane M. Belyavskaya
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, United States of America
| | - Makayla M. McCoskey
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, United States of America
| | - Rachel A. Dandar
- Department of Biology, Kalamazoo College, Kalamazoo, MI, 49006, United States of America
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Tham YK, Bernardo BC, Ooi JYY, Weeks KL, McMullen JR. Pathophysiology of cardiac hypertrophy and heart failure: signaling pathways and novel therapeutic targets. Arch Toxicol 2015; 89:1401-38. [DOI: 10.1007/s00204-015-1477-x] [Citation(s) in RCA: 371] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 02/09/2015] [Indexed: 12/18/2022]
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Stammers AN, Susser SE, Hamm NC, Hlynsky MW, Kimber DE, Kehler DS, Duhamel TA. The regulation of sarco(endo)plasmic reticulum calcium-ATPases (SERCA). Can J Physiol Pharmacol 2015; 93:843-54. [PMID: 25730320 DOI: 10.1139/cjpp-2014-0463] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The sarco(endo)plasmic reticulum calcium ATPase (SERCA) is responsible for transporting calcium (Ca(2+)) from the cytosol into the lumen of the sarcoplasmic reticulum (SR) following muscular contraction. The Ca(2+) sequestering activity of SERCA facilitates muscular relaxation in both cardiac and skeletal muscle. There are more than 10 distinct isoforms of SERCA expressed in different tissues. SERCA2a is the primary isoform expressed in cardiac tissue, whereas SERCA1a is the predominant isoform expressed in fast-twitch skeletal muscle. The Ca(2+) sequestering activity of SERCA is regulated at the level of protein content and is further modified by the endogenous proteins phospholamban (PLN) and sarcolipin (SLN). Additionally, several novel mechanisms, including post-translational modifications and microRNAs (miRNAs) are emerging as integral regulators of Ca(2+) transport activity. These regulatory mechanisms are clinically relevant, as dysregulated SERCA function has been implicated in the pathology of several disease states, including heart failure. Currently, several clinical trials are underway that utilize novel therapeutic approaches to restore SERCA2a activity in humans. The purpose of this review is to examine the regulatory mechanisms of the SERCA pump, with a particular emphasis on the influence of exercise in preventing the pathological conditions associated with impaired SERCA function.
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Affiliation(s)
- Andrew N Stammers
- a Health, Leisure & Human Performance Research Institute, Faculty of Kinesiology & Recreation Management, University of Manitoba.,b Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre
| | - Shanel E Susser
- b Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre.,c Department of Physiology, Faculty of Health Sciences, University of Manitoba
| | - Naomi C Hamm
- a Health, Leisure & Human Performance Research Institute, Faculty of Kinesiology & Recreation Management, University of Manitoba.,b Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre
| | - Michael W Hlynsky
- a Health, Leisure & Human Performance Research Institute, Faculty of Kinesiology & Recreation Management, University of Manitoba.,b Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre
| | - Dustin E Kimber
- a Health, Leisure & Human Performance Research Institute, Faculty of Kinesiology & Recreation Management, University of Manitoba.,b Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre
| | - D Scott Kehler
- a Health, Leisure & Human Performance Research Institute, Faculty of Kinesiology & Recreation Management, University of Manitoba.,b Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre
| | - Todd A Duhamel
- a Health, Leisure & Human Performance Research Institute, Faculty of Kinesiology & Recreation Management, University of Manitoba.,b Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre.,c Department of Physiology, Faculty of Health Sciences, University of Manitoba
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49
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Willis BC, Salazar-Cantú A, Silva-Platas C, Fernández-Sada E, Villegas CA, Rios-Argaiz E, González-Serrano P, Sánchez LA, Guerrero-Beltrán CE, García N, Torre-Amione G, García-Rivas GJ, Altamirano J. Impaired oxidative metabolism and calcium mishandling underlie cardiac dysfunction in a rat model of post-acute isoproterenol-induced cardiomyopathy. Am J Physiol Heart Circ Physiol 2014; 308:H467-77. [PMID: 25527782 DOI: 10.1152/ajpheart.00734.2013] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Stress-induced cardiomyopathy, triggered by acute catecholamine discharge, is a syndrome characterized by transient, apical ballooning linked to acute heart failure and ventricular arrhythmias. Rats receiving an acute isoproterenol (ISO) overdose (OV) suffer cardiac apex ischemia-reperfusion damage and arrhythmia, and then undergo cardiac remodeling and dysfunction. Nevertheless, the subcellular mechanisms underlying cardiac dysfunction after acute damage subsides are not thoroughly understood. To address this question, Wistar rats received a single ISO injection (67 mg/kg). We found in vivo moderate systolic and diastolic dysfunction at 2 wk post-ISO-OV; however, systolic dysfunction recovered after 4 wk, while diastolic dysfunction worsened. At 2 wk post-ISO-OV, cardiac function was assessed ex vivo, while mitochondrial oxidative metabolism and stress were assessed in vitro, and Ca(2+) handling in ventricular myocytes. These were complemented with sarco(endo)plasmic reticulum Ca(2+)-ATPase (SERCA), phospholamban (PLB), and RyR2 expression studies. Ex vivo, basal mechanical performance index (MPI) and oxygen consumption rate (MVO2) were unchanged. Nevertheless, upon increase of metabolic demand, by β-adrenergic stimulation (1-100 nM ISO), the MPI versus MVO2 relation decreased and shifted to the right, suggesting MPI and mitochondrial energy production uncoupling. Mitochondria showed decreased oxidative metabolism, membrane fragility, and enhanced oxidative stress. Myocytes presented systolic and diastolic Ca(2+) mishandling, and blunted response to ISO (100 nM), and all these without apparent changes in SERCA, PLB, or RyR2 expression. We suggest that post-ISO-OV mitochondrial dysfunction may underlie decreased cardiac contractility, mainly by depletion of ATP needed for myofilaments and Ca(2+) transport by SERCA, while exacerbated oxidative stress may enhance diastolic RyR2 activity.
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Affiliation(s)
- B Cicero Willis
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México
| | - Ayleen Salazar-Cantú
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México
| | - Christian Silva-Platas
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México; Basic and Translational Research Center, Hospital Zambrano-Hellion, TEC Salud, San Pedro, Garza-García, México; and
| | - Evaristo Fernández-Sada
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México
| | - César A Villegas
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México
| | - Eduardo Rios-Argaiz
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México
| | - Pilar González-Serrano
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México
| | - Luis A Sánchez
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México
| | - Carlos E Guerrero-Beltrán
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México; Basic and Translational Research Center, Hospital Zambrano-Hellion, TEC Salud, San Pedro, Garza-García, México; and
| | - Noemí García
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México; Basic and Translational Research Center, Hospital Zambrano-Hellion, TEC Salud, San Pedro, Garza-García, México; and
| | - Guillermo Torre-Amione
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México; Basic and Translational Research Center, Hospital Zambrano-Hellion, TEC Salud, San Pedro, Garza-García, México; and Methodist DeBakey Heart and Vascular Center, The Methodist Hospital, Houston, Texas
| | - Gerardo J García-Rivas
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México; Basic and Translational Research Center, Hospital Zambrano-Hellion, TEC Salud, San Pedro, Garza-García, México; and
| | - Julio Altamirano
- Endowed Chair in Cardiology and Vascular Medicine, School of Medicine, Tecnológico de Monterrey, Monterrey México; Basic and Translational Research Center, Hospital Zambrano-Hellion, TEC Salud, San Pedro, Garza-García, México; and
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Gallo M, Tarzia V, Iop L, Bejko J, Bortolussi G, Bianco R, Bottio T, Gerosa G. Cellular, molecular, genomic changes occurring in the heart under mechanical circulatory support. Ann Cardiothorac Surg 2014; 3:496-504. [PMID: 25452910 DOI: 10.3978/j.issn.2225-319x.2014.08.23] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 08/04/2014] [Indexed: 01/06/2023]
Affiliation(s)
- Michele Gallo
- Division of Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padova 35128, Italy
| | - Vincenzo Tarzia
- Division of Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padova 35128, Italy
| | - Laura Iop
- Division of Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padova 35128, Italy
| | - Jonida Bejko
- Division of Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padova 35128, Italy
| | - Giacomo Bortolussi
- Division of Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padova 35128, Italy
| | - Roberto Bianco
- Division of Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padova 35128, Italy
| | - Tomaso Bottio
- Division of Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padova 35128, Italy
| | - Gino Gerosa
- Division of Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padova 35128, Italy
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