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Kovács Á, Zhazykbayeva S, Herwig M, Fülöp GÁ, Csípő T, Oláh N, Hassoun R, Budde H, Osman H, Kaçmaz M, Jaquet K, Priksz D, Juhász B, Akin I, Papp Z, Schmidt WE, Mügge A, El-Battrawy I, Tóth A, Hamdani N. Sex-specific cardiovascular remodeling leads to a divergent sex-dependent development of heart failure in aged hypertensive rats. GeroScience 2024:10.1007/s11357-024-01160-w. [PMID: 38656649 DOI: 10.1007/s11357-024-01160-w] [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: 12/09/2023] [Accepted: 04/09/2024] [Indexed: 04/26/2024] Open
Abstract
INTRODUCTION The prevalence of heart failure with preserved ejection fraction (HFpEF) is continuously rising and predominantly affects older women often hypertensive and/or obese or diabetic. Indeed, there is evidence on sex differences in the development of HF. Hence, we studied cardiovascular performance dependent on sex and age as well as pathomechanisms on a cellular and molecular level. METHODS We studied 15-week- and 1-year-old female and male hypertensive transgenic rats carrying the mouse Ren-2 renin gene (TG) and compared them to wild-type (WT) controls at the same age. We tracked blood pressure and cardiac function via echocardiography. After sacrificing the 1-year survivors we studied vascular smooth muscle and endothelial function. Isolated single skinned cardiomyocytes were used to determine passive stiffness and Ca2+-dependent force. In addition, Western blots were applied to analyse the phosphorylation status of sarcomeric regulatory proteins, titin and of protein kinases AMPK, PKG, CaMKII as well as their expression. Protein kinase activity assays were used to measure activities of CaMKII, PKG and angiotensin-converting enzyme (ACE). RESULTS TG male rats showed significantly higher mortality at 1 year than females or WT male rats. Left ventricular (LV) ejection fraction was specifically reduced in male, but not in female TG rats, while LV diastolic dysfunction was evident in both TG sexes, but LV hypertrophy, increased LV ACE activity, and reduced AMPK activity as evident from AMPK hypophosphorylation were specific to male rats. Sex differences were also observed in vascular and cardiomyocyte function showing different response to acetylcholine and Ca2+-sensitivity of force production, respectively cardiomyocyte functional changes were associated with altered phosphorylation states of cardiac myosin binding protein C and cardiac troponin I phosphorylation in TG males only. Cardiomyocyte passive stiffness was increased in TG animals. On a molecular level titin phosphorylation pattern was altered, though alterations were sex-specific. Thus, also the reduction of PKG expression and activity was more pronounced in TG females. However, cardiomyocyte passive stiffness was restored by PKG and CaMKII treatments in both TG sexes. CONCLUSION Here we demonstrated divergent sex-specific cardiovascular adaptation to the over-activation of the renin-angiotensin system in the rat. Higher mortality of male TG rats in contrast to female TG rats was observed as well as reduced LV systolic function, whereas females mainly developed HFpEF. Though both sexes developed increased myocardial stiffness to which an impaired titin function contributes to a sex-specific molecular mechanism. The functional derangements of titin are due to a sex-specific divergent regulation of PKG and CaMKII systems.
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Affiliation(s)
- Árpád Kovács
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Division of Clinical Physiology, Department of Cardiology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Saltanat Zhazykbayeva
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
| | - Melissa Herwig
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
| | - Gábor Á Fülöp
- Division of Clinical Physiology, Department of Cardiology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Tamás Csípő
- Division of Clinical Physiology, Department of Cardiology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Nikolett Oláh
- Division of Clinical Physiology, Department of Cardiology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Roua Hassoun
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
| | - Heidi Budde
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
| | - Hersh Osman
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
| | - Mustafa Kaçmaz
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
- HCEMM-SU Cardiovascular Comorbidities Research Group, Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, 1089, Hungary
| | - Kornelia Jaquet
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
| | - Dániel Priksz
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Béla Juhász
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Ibrahim Akin
- University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany
| | - Zoltán Papp
- Division of Clinical Physiology, Department of Cardiology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
- Research Centre for Molecular Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Wolfgang E Schmidt
- Department of Medicine I, St. Josef Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
| | - Andreas Mügge
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology and Angiology, Bergmannsheil University Hospitals, UK RUB, Ruhr University of Bochum, 44789, Bochum, Germany
| | - Ibrahim El-Battrawy
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany
- Department of Cardiology and Angiology, Bergmannsheil University Hospitals, UK RUB, Ruhr University of Bochum, 44789, Bochum, Germany
| | - Attila Tóth
- Division of Clinical Physiology, Department of Cardiology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
- Research Centre for Molecular Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Nazha Hamdani
- Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, 44801, Bochum, Germany.
- Institut für Forschung und Lehre (IFL), Molecular and Experimental Cardiology, Ruhr University Bochum, 44801, Bochum, Germany.
- Department of Cardiology, St. Josef-Hospital, UK RUB, Ruhr University Bochum, 44801, Bochum, Germany.
- HCEMM-SU Cardiovascular Comorbidities Research Group, Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, 1089, Hungary.
- Department of Physiology, Cardiovascular Research Institute, Maastricht University, 6229, ER, Maastricht, The Netherlands.
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Beghi S, Furmanik M, Jaminon A, Veltrop R, Rapp N, Wichapong K, Bidar E, Buschini A, Schurgers LJ. Calcium Signalling in Heart and Vessels: Role of Calmodulin and Downstream Calmodulin-Dependent Protein Kinases. Int J Mol Sci 2022; 23:ijms232416139. [PMID: 36555778 PMCID: PMC9783221 DOI: 10.3390/ijms232416139] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/11/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Cardiovascular disease is the major cause of death worldwide. The success of medication and other preventive measures introduced in the last century have not yet halted the epidemic of cardiovascular disease. Although the molecular mechanisms of the pathophysiology of the heart and vessels have been extensively studied, the burden of ischemic cardiovascular conditions has risen to become a top cause of morbidity and mortality. Calcium has important functions in the cardiovascular system. Calcium is involved in the mechanism of excitation-contraction coupling that regulates numerous events, ranging from the production of action potentials to the contraction of cardiomyocytes and vascular smooth muscle cells. Both in the heart and vessels, the rise of intracellular calcium is sensed by calmodulin, a protein that regulates and activates downstream kinases involved in regulating calcium signalling. Among them is the calcium calmodulin kinase family, which is involved in the regulation of cardiac functions. In this review, we present the current literature regarding the role of calcium/calmodulin pathways in the heart and vessels with the aim to summarize our mechanistic understanding of this process and to open novel avenues for research.
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Affiliation(s)
- Sofia Beghi
- Cardiovascular Research Institute Maastricht (CARIM), Department of Biochemistry, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area Delle Scienze 11A, 43124 Parma, Italy
- Correspondence: ; Tel.: +39-3408473527
| | - Malgorzata Furmanik
- Cardiovascular Research Institute Maastricht (CARIM), Department of Biochemistry, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - Armand Jaminon
- Cardiovascular Research Institute Maastricht (CARIM), Department of Biochemistry, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - Rogier Veltrop
- Cardiovascular Research Institute Maastricht (CARIM), Department of Biochemistry, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - Nikolas Rapp
- Cardiovascular Research Institute Maastricht (CARIM), Department of Biochemistry, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - Kanin Wichapong
- Cardiovascular Research Institute Maastricht (CARIM), Department of Biochemistry, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - Elham Bidar
- Department of Cardiothoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre+, 6229 HX Maastricht, The Netherlands
| | - Annamaria Buschini
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area Delle Scienze 11A, 43124 Parma, Italy
| | - Leon J. Schurgers
- Cardiovascular Research Institute Maastricht (CARIM), Department of Biochemistry, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
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Ion Channel Impairment and Myofilament Ca 2+ Sensitization: Two Parallel Mechanisms Underlying Arrhythmogenesis in Hypertrophic Cardiomyopathy. Cells 2021; 10:cells10102789. [PMID: 34685769 PMCID: PMC8534456 DOI: 10.3390/cells10102789] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 10/07/2021] [Accepted: 10/13/2021] [Indexed: 11/17/2022] Open
Abstract
Life-threatening ventricular arrhythmias are the main clinical burden in patients with hypertrophic cardiomyopathy (HCM), and frequently occur in young patients with mild structural disease. While massive hypertrophy, fibrosis and microvascular ischemia are the main mechanisms underlying sustained reentry-based ventricular arrhythmias in advanced HCM, cardiomyocyte-based functional arrhythmogenic mechanisms are likely prevalent at earlier stages of the disease. In this review, we will describe studies conducted in human surgical samples from HCM patients, transgenic animal models and human cultured cell lines derived from induced pluripotent stem cells. Current pieces of evidence concur to attribute the increased risk of ventricular arrhythmias in early HCM to different cellular mechanisms. The increase of late sodium current and L-type calcium current is an early observation in HCM, which follows post-translation channel modifications and increases the occurrence of early and delayed afterdepolarizations. Increased myofilament Ca2+ sensitivity, commonly observed in HCM, may promote afterdepolarizations and reentry arrhythmias with direct mechanisms. Decrease of K+-currents due to transcriptional regulation occurs in the advanced disease and contributes to reducing the repolarization-reserve and increasing the early afterdepolarizations (EADs). The presented evidence supports the idea that patients with early-stage HCM should be considered and managed as subjects with an acquired channelopathy rather than with a structural cardiac disease.
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Yu F, Yu Y, Tian S, Zhou Y, Chen X, Ye J, Liu Q, Xu X, Zhou H, Zhang W. Quantitative proteomics reveals Shexiang Baoxin Pill exerts cardioprotective effects by preserving energy metabolism in a rat model of myocardial infarction. JOURNAL OF ETHNOPHARMACOLOGY 2021; 266:113460. [PMID: 33039626 DOI: 10.1016/j.jep.2020.113460] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/02/2020] [Accepted: 10/04/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Shexiang Baoxin Pill (SBP) is a composite formula of traditional Chinese medicine used to treat cardiovascular disease (CVD) in the clinic. However, the mechanism of its therapeutic effect on CVD has not been clearly elucidated yet. AIM OF THE STUDY The aim of this study was to investigate the potential cardioprotective mechanism of SBP in the treatment of myocardial infarction (MI) model rats by applying proteomic approach. MATERIALS AND METHODS The rat model of MI was generated by ligating the left anterior descending coronary artery. Eighteen rats were randomly divided into three groups (n = 6 each): the MI group, MI group treated with SBP (SBP), and sham-operated group (SOG). Cardiac function in the experimental groups was assessed by echocardiography analyses after 15 days of treatment. A label-free quantitative proteomic approach was utilized to investigate the whole proteomes of heart tissues from the groups above on the day of the operation (Day 0) and 15 days later (Day 15). The differentially expressed proteins were subsequently analyzed with bioinformatic methods. Additionally, the expression levels of two promising proteins were validated by Western blotting. RESULTS The echocardiography analyses showed that SBP treatment significantly preserved the cardiac function of MI rats. Additionally, quantitative proteomics identified 389 differentially expressed proteins, and 15 proteins were considered as logical candidates for explaining the cardioprotective effect of SBP. Bioinformatic analysis of these differentially expressed proteins revealed that the proteins involved in cellular mitochondrial energy metabolism processes, such as fatty acid beta-oxidation and aerobic respiration, were significantly regulated under SBP treatment, of which fatty acid-binding protein 3 (FABP3) and myoglobin (MB) were significantly downregulated in the MI model group compared with the SOG group and returned to the basal level with SBP treatment, confirmed by Western blotting. CONCLUSIONS The results of our study suggest that the cardioprotective effects of SBP are achieved through the preservation of energy metabolism in the heart tissue of MI rats.
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Affiliation(s)
- Feng Yu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Yue Yu
- Department of Analytical Chemistry and CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Saisai Tian
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Yanting Zhou
- Department of Analytical Chemistry and CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Xiangling Chen
- Department of Analytical Chemistry and CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ji Ye
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Qian Liu
- Department of Analytical Chemistry and CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xike Xu
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Hu Zhou
- Department of Analytical Chemistry and CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China; E-institute of Shanghai Municipal Education Committee, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
| | - Weidong Zhang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China; School of Pharmacy, Second Military Medical University, Shanghai, 200433, China.
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Miura M, Hasegawa T, Matsumoto A, Nishiyama M, Someya Y, Satoh W, Kumasaka K, Shindoh C, Sato H. Effect of transient elevation of glucose on contractile properties in non-diabetic rat cardiac muscle. Heart Vessels 2020; 36:568-576. [PMID: 33226494 DOI: 10.1007/s00380-020-01726-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 11/06/2020] [Indexed: 10/22/2022]
Abstract
In non-diabetic patients with severe disease, such as acute myocardial infarction or acute heart failure, admission blood glucose level is associated with their short-term and long-term mortality. We examined whether transient elevation of glucose affects contractile properties in non-diabetic hearts. Force, intracellular Ca2+ ([Ca2+]i), and sarcomere length were measured in trabeculae from rat hearts. To assess contractile properties, maximum velocity of contraction (Max dF/dt) and minimum velocity of relaxation (Min dF/dt) were calculated. The ratio of phosphorylated troponin I (P-TnI) to troponin I (TnI) was measured. One hour after elevation of glucose from 150 to 400 mg/dL, developed force, Max dF/dt, and Min dF/dt were reduced without changes in [Ca2+]i transients at 2.5 Hz stimulation and 2.0 mM [Ca2+]o, while developed force and [Ca2+]i transients showed no changes at 0.5 Hz stimulation and 0.7 mM [Ca2+]o. In the presence of 1 μM KN-93, a Ca2+/calmodulin-dependent protein kinaseII (CaMKII) inhibitor, or 50 μM diazo-5-oxonorleucine, a L-glutamine-D-fructose-6-phosphate amidotransferase inhibitor, the reduction of contractile properties after elevation of glucose was suppressed. Furthermore, 1 h after elevation of glucose to 400 mg/dL at 2.0 mM [Ca2+]o, the ratio of P-TnI to TnI was increased. These results suggest that in non-diabetic hearts under higher Ca2+-load, transient elevation of glucose for 1 h reduces contractile properties probably by activating CaMKII through O-GlcNAcylation. Thus, in the patients with severe disease, transient elevation of blood glucose, such as due to stress, may worsen cardiac function and thereby affect their mortality without known diabetes.
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Affiliation(s)
- Masahito Miura
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan.
| | - Taiki Hasegawa
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Ayana Matsumoto
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Masami Nishiyama
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Yuka Someya
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Wakako Satoh
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Kazunori Kumasaka
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Chiyohiko Shindoh
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Haruka Sato
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
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Liu Z, Tao B, Fan S, Cui S, Pu Y, Qiu L, Xia H, Xu L. Over-expression of microRNA-145 drives alterations in β-adrenergic signaling and attenuates cardiac remodeling in heart failure post myocardial infarction. Aging (Albany NY) 2020; 12:11603-11622. [PMID: 32554856 PMCID: PMC7343449 DOI: 10.18632/aging.103320] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 04/28/2020] [Indexed: 12/13/2022]
Abstract
Background: Numerous studies have highlighted the crucial role of microRNA-145 (miR-145) in coronary atherosclerosis and myocardial ischemia reperfusion injury. However, effects of miR-145 on β-adrenergic signaling and cardiac remodeling in heart failure (HF) remains unclarified. Methods and Results: We established HF model in rats with left anterior descending coronary artery (LAD) occlusion. Four weeks after LAD ligation, rats showed substantial aggravation of cardiac dilation and electrophysiological instability. Up-regulation of miR-145 ameliorated HF-induced myocardial fibrosis and prolonged action potential duration. Echocardiography revealed increased basal contractility and decreased left ventricular inner-diameter in miR-145 over-expressed heart, while cardiac response to β-adrenergic receptor (βAR) stimulation was reduced. Furthermore, miR-145 increased L-type calcium current (ICa) density while decreased ICa response to β-adrenergic stimulation with isoproterenol. The alterations in βAR signaling might be predominant due to miR-145-mediated activation of Akt/CREB cascades. At high frequency pacing, Ca2+ transient, cell shortening and frequency of Ca2+ waves were significantly improved in AD-miR-145 group. Western blotting revealed that increased expression of Cav1.2, Ca2+-ATPase, β2AR, GNAI3 and decreased level of CaMKII might be attributed to the cardioprotective effects of miR-145. Conclusion: miR-145 effectively alleviates HF-related cardiac remodeling by improving cardiac dilation, fibrosis, intracellular Ca2+ mishandling and electrophysiological instability.
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Affiliation(s)
- Zhebo Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China.,Cardiovascular Research Institute, Wuhan University, Wuhan, PR China.,Hubei Key Laboratory of Cardiology, Wuhan, PR China
| | - Bo Tao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China.,Cardiovascular Research Institute, Wuhan University, Wuhan, PR China.,Hubei Key Laboratory of Cardiology, Wuhan, PR China
| | - Suzhen Fan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China.,Cardiovascular Research Institute, Wuhan University, Wuhan, PR China.,Hubei Key Laboratory of Cardiology, Wuhan, PR China
| | - Shengyu Cui
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China.,Cardiovascular Research Institute, Wuhan University, Wuhan, PR China.,Hubei Key Laboratory of Cardiology, Wuhan, PR China
| | - Yong Pu
- Renmin Hospital of Hannan, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Liqiang Qiu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China.,Cardiovascular Research Institute, Wuhan University, Wuhan, PR China.,Hubei Key Laboratory of Cardiology, Wuhan, PR China
| | - Hao Xia
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China.,Cardiovascular Research Institute, Wuhan University, Wuhan, PR China.,Hubei Key Laboratory of Cardiology, Wuhan, PR China
| | - Lin Xu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China.,Cardiovascular Research Institute, Wuhan University, Wuhan, PR China.,Hubei Key Laboratory of Cardiology, Wuhan, PR China
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Miura M, Handoh T, Taguchi Y, Hasegawa T, Takahashi Y, Morita N, Matsumoto A, Shindoh C, Sato H. Transient Elevation of Glucose Increases Arrhythmia Susceptibility in Non-Diabetic Rat Trabeculae With Non-Uniform Contraction. Circ J 2020; 84:551-558. [PMID: 32092718 DOI: 10.1253/circj.cj-19-0715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND In non-diabetic patients with acute coronary syndrome, stress hyperglycemia occasionally occurs and is related to their mortality. Whether transient elevation of glucose affects arrhythmia susceptibility in non-diabetic hearts with non-uniform contraction was examined.Methods and Results:Force, intracellular Ca2+([Ca2+]i), and membrane potential were measured in trabeculae from rat hearts. Non-uniform contraction was produced by a jet of paralyzing solution. Ca2+waves and arrhythmias were induced by electrical stimulation (2.0 mmol/L [Ca2+]o). The activity of Ca2+/calmodulin-dependent protein kinaseII (CaMKII) was measured. An elevation of glucose from 150 to 400 mg/dL increased the velocity of Ca2+waves and the number of spontaneous action potentials triggered by electrical stimulation. Besides, the elevation of glucose increased the CaMKII activity. In the presence of 1 μmol/L KN-93, the elevation of glucose did not increase the velocity of Ca2+waves and the number of triggered action potentials. In addition, in the presence of 1 μmol/L autocamtide-2 related inhibitory peptide or 50 μmol/L diazo-5-oxonorleucine, the elevation of glucose did not increase the number of triggered action potentials. Furthermore, the elevation of glucose by adding L-glucose did not increase their number. CONCLUSIONS In non-diabetic hearts with non-uniform contraction, transient elevation of glucose increases the velocity of Ca2+waves by activating CaMKII,probably through glycosylation with O-linked β-N-acetylglucosamine, thereby increasing arrhythmia susceptibility.
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Affiliation(s)
- Masahito Miura
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
| | - Tetsuya Handoh
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
| | - Yuhto Taguchi
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
| | - Taiki Hasegawa
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
| | - Yui Takahashi
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
| | - Natsuki Morita
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
| | - Ayana Matsumoto
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
| | - Chiyohiko Shindoh
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
| | - Haruka Sato
- Department of Clinical Physiology, Health Science, Tohoku University Graduate School of Medicine
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8
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Balcazar D, Regge V, Santalla M, Meyer H, Paululat A, Mattiazzi A, Ferrero P. SERCA is critical to control the Bowditch effect in the heart. Sci Rep 2018; 8:12447. [PMID: 30127403 PMCID: PMC6102201 DOI: 10.1038/s41598-018-30638-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 07/16/2018] [Indexed: 11/08/2022] Open
Abstract
The Bowditch effect or staircase phenomenon is the increment or reduction of contractile force when heart rate increases, defined as either a positive or negative staircase. The healthy and failing human heart both show positive or negative staircase, respectively, but the causes of these distinct cardiac responses are unclear. Different experimental approaches indicate that while the level of Ca2+ in the sarcoplasmic reticulum is critical, the molecular mechanisms are unclear. Here, we demonstrate that Drosophila melanogaster shows a negative staircase which is associated to a slight but significant frequency-dependent acceleration of relaxation (FDAR) at the highest stimulation frequencies tested. We further showed that the type of staircase is oppositely modified by two distinct SERCA mutations. The dominant conditional mutation SERCAA617T induced positive staircase and arrhythmia, while SERCAE442K accentuated the negative staircase of wild type. At the stimulation frequencies tested, no significant FDAR could be appreciated in mutant flies. The present results provide evidence that two individual mutations directly modify the type of staircase occurring within the heart and suggest an important role of SERCA in regulating the Bowditch effect.
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Affiliation(s)
- Darío Balcazar
- Centro de Investigaciones Cardiovasculares - CONICET/Universidad Nacional de la Plata, La Plata, Argentina
| | - Victoria Regge
- Centro de Investigaciones Cardiovasculares - CONICET/Universidad Nacional de la Plata and Departamento de Ciencias Básicas y Experimentales -UNNOBA, La Plata, Argentina
| | - Manuela Santalla
- Centro de Investigaciones Cardiovasculares - CONICET/Universidad Nacional de la Plata and Departamento de Ciencias Básicas y Experimentales -UNNOBA, La Plata, Argentina
| | - Heiko Meyer
- University of Osnabrück, Biology, Department of Zoology and Developmental Biology, Barbarastraße 11, 49076, Osnabrück, Germany
| | - Achim Paululat
- University of Osnabrück, Biology, Department of Zoology and Developmental Biology, Barbarastraße 11, 49076, Osnabrück, Germany
| | - Alicia Mattiazzi
- Centro de Investigaciones Cardiovasculares - CONICET/Universidad Nacional de la Plata, La Plata, Argentina
| | - Paola Ferrero
- Centro de Investigaciones Cardiovasculares - CONICET/Universidad Nacional de la Plata and Departamento de Ciencias Básicas y Experimentales -UNNOBA, La Plata, Argentina.
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9
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Zhang R, Xu Y, Niu H, Tao T, Ban T, Zheng L, Ai J. Lycium barbarum polysaccharides restore adverse structural remodelling and cardiac contractile dysfunction induced by overexpression of microRNA-1. J Cell Mol Med 2018; 22:4830-4839. [PMID: 30117672 PMCID: PMC6156239 DOI: 10.1111/jcmm.13740] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Accepted: 05/20/2018] [Indexed: 12/14/2022] Open
Abstract
MicroRNA‐1 (miR‐1) stands out as the most prominent microRNA (miRNA) in regulating cardiac function and has been perceived as a new potential therapeutic target. Lycium barbarum polysaccharides (LBPs) are major active constituents of the traditional Chinese medicine based on L. barbarum. The purpose of this study was to exploit the cardioprotective effect and molecular mechanism of LBPs underlying heart failure. We found that LBPs significantly reduced the expression of myocardial miR‐1. LBPs improved the abnormal ECG and indexes of cardiac functions in P‐V loop detection in transgenic (Tg) mice with miR‐1 overexpression. LBPs recovered morphological changes in sarcomeric assembly, intercalated disc and gap junction. LBPs reversed the reductions of CaM and cMLCK, the proteins targeted by miR‐1. Similar trends were also obtained in their downstream effectors including the phosphorylation of MLC2v and both total level and phosphorylation of CaMKII and cMyBP‐C. Collectively, LBPs restored adverse structural remodelling and improved cardiac contractile dysfunction induced by overexpression of miR‐1. One of the plausible mechanisms was that LBPs down‐regulated miR‐1 expression and consequently reversed miR‐1‐induced repression of target proteins relevant to myocardial contractibility. LBPs could serve as a new, at least a very useful adjunctive, candidate for prevention and therapy of heart failure.
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Affiliation(s)
- Rong Zhang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yi Xu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Huifang Niu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Ting Tao
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Tao Ban
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Linyao Zheng
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jing Ai
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
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10
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Daniels LJ, Wallace RS, Nicholson OM, Wilson GA, McDonald FJ, Jones PP, Baldi JC, Lamberts RR, Erickson JR. Inhibition of calcium/calmodulin-dependent kinase II restores contraction and relaxation in isolated cardiac muscle from type 2 diabetic rats. Cardiovasc Diabetol 2018; 17:89. [PMID: 29903013 PMCID: PMC6001139 DOI: 10.1186/s12933-018-0732-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 06/06/2018] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Calcium/calmodulin-dependent kinase II-delta (CaMKIIδ) activity is enhanced during hyperglycemia and has been shown to alter intracellular calcium handling in cardiomyocytes, ultimately leading to reduced cardiac performance. However, the effects of CaMKIIδ on cardiac contractility during type 2 diabetes are undefined. METHODS We examined the expression and activation of CaMKIIδ in right atrial appendages from non-diabetic and type 2 diabetic patients (n = 7 patients per group) with preserved ejection fraction, and also in right ventricular tissue from Zucker Diabetic Fatty rats (ZDF) (n = 5-10 animals per group) during early diabetic cardiac dysfunction, using immunoblot. We also measured whole heart function of ZDF and control rats using echocardiography. Then we measured contraction and relaxation parameters of isolated trabeculae from ZDF to control rats in the presence and absence of CaMKII inhibitors. RESULTS CaMKIIδ phosphorylation (at Thr287) was increased in both the diabetic human and animal tissue, indicating increased CaMKIIδ activation in the type 2 diabetic heart. Basal cardiac contractility and relaxation were impaired in the cardiac muscles from the diabetic rats, and CaMKII inhibition with KN93 partially restored contractility and relaxation. Autocamtide-2-related-inhibitor peptide (AIP), another CaMKII inhibitor that acts via a different mechanism than KN93, fully restored cardiac contractility and relaxation. CONCLUSIONS Our results indicate that CaMKIIδ plays a key role in modulating performance of the diabetic heart, and moreover, suggest a potential therapeutic role for CaMKII inhibitors in improving myocardial function during type 2 diabetes.
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Affiliation(s)
- Lorna J Daniels
- Otago School of Medical Sciences, Department of Physiology and HeartOtago, University of Otago, 270 Great King Street, Dunedin, 9016, New Zealand
| | - Rachel S Wallace
- Otago School of Medical Sciences, Department of Physiology and HeartOtago, University of Otago, 270 Great King Street, Dunedin, 9016, New Zealand
| | - Olivia M Nicholson
- Otago School of Medical Sciences, Department of Physiology and HeartOtago, University of Otago, 270 Great King Street, Dunedin, 9016, New Zealand
| | - Genevieve A Wilson
- Otago School of Medical Sciences, Department of Medicine and HeartOtago, University of Otago, Dunedin, New Zealand
| | - Fiona J McDonald
- Otago School of Medical Sciences, Department of Physiology and HeartOtago, University of Otago, 270 Great King Street, Dunedin, 9016, New Zealand
| | - Peter P Jones
- Otago School of Medical Sciences, Department of Physiology and HeartOtago, University of Otago, 270 Great King Street, Dunedin, 9016, New Zealand
| | - J Chris Baldi
- Otago School of Medical Sciences, Department of Medicine and HeartOtago, University of Otago, Dunedin, New Zealand
| | - Regis R Lamberts
- Otago School of Medical Sciences, Department of Physiology and HeartOtago, University of Otago, 270 Great King Street, Dunedin, 9016, New Zealand
| | - Jeffrey R Erickson
- Otago School of Medical Sciences, Department of Physiology and HeartOtago, University of Otago, 270 Great King Street, Dunedin, 9016, New Zealand.
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11
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Wang Q, Quick AP, Cao S, Reynolds J, Chiang DY, Beavers D, Li N, Wang G, Rodney GG, Anderson ME, Wehrens XHT. Oxidized CaMKII (Ca 2+/Calmodulin-Dependent Protein Kinase II) Is Essential for Ventricular Arrhythmia in a Mouse Model of Duchenne Muscular Dystrophy. Circ Arrhythm Electrophysiol 2018; 11:e005682. [PMID: 29654126 PMCID: PMC5903581 DOI: 10.1161/circep.117.005682] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 02/26/2018] [Indexed: 01/16/2023]
Abstract
BACKGROUND Duchenne muscular dystrophy patients are prone to ventricular arrhythmias, which may be caused by abnormal calcium (Ca2+) homeostasis and elevated reactive oxygen species. CaMKII (Ca2+/calmodulin-dependent protein kinase II) is vital for normal Ca2+ homeostasis, but excessive CaMKII activity contributes to abnormal Ca2+ homeostasis and arrhythmias in cardiomyocytes. Reactive oxygen species induce CaMKII to become autonomously active. We hypothesized that genetic inhibition of CaMKII oxidation (ox-CaMKII) in a mouse model of Duchenne muscular dystrophy can alleviate abnormal Ca2+ homeostasis, thus, preventing ventricular arrhythmia. The objective of this study was to test if selective loss of ox-CaMKII affects ventricular arrhythmias in the mdx mouse model of Duchenne muscular dystrophy. METHODS AND RESULTS 5-(6)-Chloromethyl-2,7-dichlorodihydrofluorescein diacetate staining revealed increased reactive oxygen species production in ventricular myocytes isolated from mdx mice, which coincides with elevated ventricular ox-CaMKII demonstrated by Western blotting. Genetic inhibition of ox-CaMKII by knockin replacement of the regulatory domain methionines with valines (MM-VV [CaMKII M281/282V]) prevented ventricular tachycardia in mdx mice. Confocal calcium imaging of ventricular myocytes isolated from mdx:MM-VV mice revealed normalization of intracellular Ca2+ release events compared with cardiomyocytes from mdx mice. Abnormal action potentials assessed by optical mapping in mdx mice were also alleviated by genetic inhibition of ox-CaMKII. Knockout of the NADPH oxidase regulatory subunit p47 phox normalized elevated ox-CaMKII, repaired intracellular Ca2+ homeostasis, and rescued inducible ventricular arrhythmias in mdx mice. CONCLUSIONS Inhibition of reactive oxygen species or ox-CaMKII protects against proarrhythmic intracellular Ca2+ handling and prevents ventricular arrhythmia in a mouse model of Duchenne muscular dystrophy.
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MESH Headings
- Action Potentials
- Animals
- Arrhythmias, Cardiac/enzymology
- Arrhythmias, Cardiac/etiology
- Arrhythmias, Cardiac/physiopathology
- Arrhythmias, Cardiac/prevention & control
- Calcium/metabolism
- Calcium Signaling
- Calcium-Calmodulin-Dependent Protein Kinase Type 2/genetics
- Calcium-Calmodulin-Dependent Protein Kinase Type 2/metabolism
- Disease Models, Animal
- Heart Rate
- Heart Ventricles/enzymology
- Heart Ventricles/physiopathology
- Mice, Inbred mdx
- Mice, Transgenic
- Muscular Dystrophy, Duchenne/complications
- Muscular Dystrophy, Duchenne/enzymology
- Muscular Dystrophy, Duchenne/physiopathology
- NADPH Oxidase 2/metabolism
- Oxidation-Reduction
- Oxidative Stress
- Reactive Oxygen Species/metabolism
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Affiliation(s)
- Qiongling Wang
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - Ann P Quick
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - Shuyi Cao
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - Julia Reynolds
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - David Y Chiang
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - David Beavers
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - Na Li
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - Guoliang Wang
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - George G Rodney
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - Mark E Anderson
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.)
| | - Xander H T Wehrens
- Department of Molecular Physiology and Biophysics (Q.W., A.P.Q., S.C., J.R., D.Y.C., D.B., N.L., G.W., G.G.R., X.H.T.W.), Department of Medicine (Cardiology) (N.L., X.H.T.W.), Department of Pediatrics (Cardiology) (X.H.T.W.), and Center for Space Medicine (X.H.T.W.), Baylor College of Medicine, Houston, TX. Brigham and Women's Hospital, Harvard Medical School, Boston, MA (D.Y.C.). Duke University School of Medicine, Durham, NC (D.B.). Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (M.E.A.).
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12
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Abstract
The transmural heterogeneity of the contractility in ventricular muscle has not been well-studied. Here, we investigated the calcium transient and sarcomere contraction/relaxation in the endocardial (Endo) and epicardial (Epi) myocytes. Endo and Epi myocytes were isolated from C57/BL6 mice by Langendorff perfusion. Ca2+ transient and sarcomere contraction/relaxation were recorded simultaneously at different stimulation frequencies using a dual excitation fluorescence photomultiplier system. We found that the Endo myocytes have higher baseline diastolic calcium, significantly larger calcium transient and stronger sarcomere shortening than Epi myocytes. However, both the rising and decline phases for calcium transient and sarcomere shortening were slower in Endo than in Epi myocytes. When simulation frequency was increased from 1 to 3 Hz, a greater percent increase in the diastole calcium level, Ca2+ transient and sarcomere shortening amplitude has been observed in the Endo myocytes. Accordingly, the frequency-dependent acceleration in the decay rate of calcium transient and sarcomere relaxation was more profound in the Endo than in Epi myocytes. Western blot analysis showed that CaMKII activity was significantly higher in Epi than in Endo myocardium before stimulation. However, this transmural heterogeneity was reversed by rapid pacing. CaMKII inhibition by KN93 diminished the frequency-dependent alterations of Ca2+ transient and sarcomere contraction. Our results suggest that the contractility of ventricular myocytes is heterogeneous. The Endo-myocardium is the major force generating layer in the heart, both at slow and fast heart rate, and the transmural heterogeneity of CaMKII activation plays an important role in the frequency-dependent alterations.
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Affiliation(s)
- Wen Pan
- Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Ziqi Yang
- Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jun Cheng
- Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Cheng Qian
- Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yanggan Wang
- Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Medical Research Institute of Wuhan University, Wuhan University, Wuhan, China
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13
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Bussey CT, Erickson JR. Physiology and pathology of cardiac CaMKII. CURRENT OPINION IN PHYSIOLOGY 2018. [DOI: 10.1016/j.cophys.2017.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Kong LH, Gu XM, Wu F, Jin ZX, Zhou JJ. CaMKII inhibition mitigates ischemia/reperfusion-elicited calpain activation and the damage to membrane skeleton proteins in isolated rat hearts. Biochem Biophys Res Commun 2017; 491:687-692. [PMID: 28754591 DOI: 10.1016/j.bbrc.2017.07.128] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 07/22/2017] [Indexed: 01/03/2023]
Abstract
Ca2+/calmodulin-dependent protein kinase II (CaMKII) has been implicated in myocardial ischemia/reperfusion (IR) injury. The aim of this study was to determine the effect of CaMKII on the damage to membrane skeleton proteins, which is an important cause of IR injury. Isolated rat hearts were subjected to 45-min global ischemia/2-h reperfusion. Both KN-62 and KN-93 were used to inhibit CaMKII. Compared with controls, the hearts in the IR group exhibited remarkable myocardial injury area, LDH release, cell apoptosis and contractile dysfunction, along with an increase in the phosphorylation of CaMKII and its substrate phospholamban. Treatment with either KN-62 or KN-93 mitigated both the heart injury and the phosphorylation of CaMKII and phospholamban. The analysis of cell skeleton proteins revealed that IR injury resulted in an increase in the 150-kDa fragments resulting from the degradation of α-fodrin and dystrophin translocating from the sarcolemmal membrane to the cytosol and a decrease in the 220-kDa isoform of ankyrin-B. As expected, Evans blue dye staining showed an increase in membrane permeability or membrane rupture in the IR group. All of these alterations were alleviated by treatment with either KN-62 or KN-93. In addition, both KN-62 and KN-93 blocked the activity and membrane recruitment of calpain, a key protease responsible for destroying cell skeleton proteins during IR injury. In conclusion, our data provide evidence that damage to membrane skeleton proteins via calpain is a destructive downstream event of CaMKII activation in the setting of myocardial IR injury.
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Affiliation(s)
- Ling-Heng Kong
- Department of Physiology, Fourth Military Medical University, Xi'an, China; Institute of Basic Medical Science, Xi'an Medical College, Xi'an, China
| | - Xiao-Ming Gu
- Department of Physiology, Fourth Military Medical University, Xi'an, China
| | - Feng Wu
- Department of Cardiology, Xi'an, China
| | - Zhen-Xiao Jin
- Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jing-Jun Zhou
- Department of Physiology, Fourth Military Medical University, Xi'an, China.
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