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Wijnker PJ, Sequeira V, Kuster DW, van der Velden J. Hypertrophic Cardiomyopathy: A Vicious Cycle Triggered by Sarcomere Mutations and Secondary Disease Hits. Antioxid Redox Signal 2019; 31:318-358. [PMID: 29490477 PMCID: PMC6602117 DOI: 10.1089/ars.2017.7236] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 02/23/2018] [Accepted: 02/25/2018] [Indexed: 02/06/2023]
Abstract
Significance: Hypertrophic cardiomyopathy (HCM) is a cardiac genetic disease characterized by left ventricular hypertrophy, diastolic dysfunction, and myocardial disarray. Disease onset occurs between 20 and 50 years of age, thus affecting patients in the prime of their life. HCM is caused by mutations in sarcomere proteins, the contractile building blocks of the heart. Despite increased knowledge of causal mutations, the exact path from genetic defect leading to cardiomyopathy is complex and involves additional disease hits. Recent Advances: Laboratory-based studies indicate that HCM development not only depends on the primary sarcomere impairment caused by the mutation but also on secondary disease-related alterations in the heart. Here we propose a vicious mutation-induced disease cycle, in which a mutation-induced energy depletion alters cellular metabolism with increased mitochondrial work, which triggers secondary disease modifiers that will worsen disease and ultimately lead to end-stage HCM. Critical Issues: Evidence shows excessive cellular reactive oxygen species (ROS) in HCM patients and HCM animal models. Oxidative stress markers are increased in the heart (oxidized proteins, DNA, and lipids) and serum of HCM patients. In addition, increased mitochondrial ROS production and changes in endogenous antioxidants are reported in HCM. Mutant sarcomeric protein may drive excessive levels of cardiac ROS via changes in cardiac efficiency and metabolism, mitochondrial activation and/or dysfunction, impaired protein quality control, and microvascular dysfunction. Future Directions: Interventions restoring metabolism, mitochondrial function, and improved ROS balance may be promising therapeutic approaches. We discuss the effects of current HCM pharmacological therapies and potential future therapies to prevent and reverse HCM. Antioxid. Redox Signal. 31, 318-358.
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Affiliation(s)
- Paul J.M. Wijnker
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
| | - Vasco Sequeira
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
| | - Diederik W.D. Kuster
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
| | - Jolanda van der Velden
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
- Netherlands Heart Institute, Utrecht, The Netherlands
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Qu J, Mei Q, Niu R. Oxidative CaMKII as a potential target for inflammatory disease (Review). Mol Med Rep 2019; 20:863-870. [PMID: 31173191 DOI: 10.3892/mmr.2019.10309] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 05/22/2019] [Indexed: 11/06/2022] Open
Abstract
CaMKII is a calcium‑activated kinase, proved to be modulated by oxidation. Currently, the oxidative activation of CaMKII exists in several models of asthma, chronic rhinosinusitis with nasal polyps, cardiovascular disease, diabetes mellitus, acute ischemic stroke and cancer. Oxidized CaMKII (ox‑CaMKII) may be important in several of these diseases. The present review examines the mechanism underlying the oxidative activation of CaMKII and summarizes the current findings associated with the function of ox‑CaMKII in inflammatory diseases. Taken together, the findings of this review aim to improve current understanding of the function of ox‑CaMKII and provide novel insights for future research.
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Affiliation(s)
- Jingjing Qu
- Department of Lung Cancer and Gastroenterology, Hunan Cancer Hospital, Affiliated Tumor Hospital of Xiangya Medical School of Central South University, Changsha, Hunan 410008, P.R. China
| | - Quanhui Mei
- Department of Intensive Care Unit, The First People's Hospital of Changde City, Changde, Hunan 410005, P.R. China
| | - Ruichao Niu
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
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Ma Y, Gong Z, Nan K, Qi S, Chen Y, Ding C, Wang D, Ru L. Apolipoprotein-J blocks increased cell injury elicited by ox-LDL via inhibiting ROS-CaMKII pathway. Lipids Health Dis 2019; 18:117. [PMID: 31113434 PMCID: PMC6530009 DOI: 10.1186/s12944-019-1066-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 05/14/2019] [Indexed: 12/27/2022] Open
Abstract
Background Oxidized low-density lipoprotein (ox-LDL) is crucial in cardiac injury. Apolipoprotein-J (ApoJ) contributes to antiapoptotic effects in the heart. We aimed to evaluate the protective effects of ApoJ against ox-LDL cytotoxicity in Neonatal rat ventricular cells (NRVCs). Methods and results NRVCs were damaged by exposure to ox-LDL, as shown by increased caspase-3/7 activity, enhanced caspase-3 expression, and decreased cell viability. ApoJ overexpression, using an adenovirus vector, significantly reduced ox-LDL-induced cell injury. ApoJ also prevented ox-LDL from augmenting reactive oxygen species (ROS) production, as demonstrated by elevated Nox2/gp91phox and P47 expression. Furthermore, ApoJ overexpression reduced CaMKIIδ expression elicited by ox-LDL in cultured NRVCs. Upregulating CaMKIIδ activity, mediated by ox-LDL, was significantly inhibited by ApoJ overexpression. A CaMKIIδ inhibitor, KN93, prevented ApoJ’s protective effect against ox-LDL cytotoxicity. A ROS scavenger, Mn (III)meso-tetrakis (4-benzoic acid) porphyrin (Mn (III)TBAP), also attenuated CaMKIIδ’s increased expression and activity, induced by ox-LDL, and showed similar results to ApoJ by attenuating ox-LDL-induced cell damage, as ApoJ did. Conclusions ApoJ confers cytoprotection to NRVCs against ox-LDL cytotoxicity through the ROS-CaMKII pathways.
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Affiliation(s)
- Yanzhuo Ma
- Department of Cardiology, Bethune International Peace Hospital, 398, Zhongshan Road, Shijiazhuang, 050082, Hebei, China
| | - Zhi Gong
- Department of Cardiology, Bethune International Peace Hospital, 398, Zhongshan Road, Shijiazhuang, 050082, Hebei, China
| | - Kai Nan
- Health and Medical Development Research Center of Hebei Province, Shijiazhuang, Hebei, China
| | - Shuying Qi
- Department of Cardiology, Bethune International Peace Hospital, 398, Zhongshan Road, Shijiazhuang, 050082, Hebei, China
| | - Yu Chen
- Department of Cardiology, Bethune International Peace Hospital, 398, Zhongshan Road, Shijiazhuang, 050082, Hebei, China
| | - Chao Ding
- Department of Cardiology, Bethune International Peace Hospital, 398, Zhongshan Road, Shijiazhuang, 050082, Hebei, China
| | - Dongmei Wang
- Department of Cardiology, Bethune International Peace Hospital, 398, Zhongshan Road, Shijiazhuang, 050082, Hebei, China
| | - Leisheng Ru
- Department of Cardiology, Bethune International Peace Hospital, 398, Zhongshan Road, Shijiazhuang, 050082, Hebei, China.
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Sakurada R, Odagiri K, Hakamata A, Kamiya C, Wei J, Watanabe H. Calcium Release from Endoplasmic Reticulum Involves Calmodulin-Mediated NADPH Oxidase-Derived Reactive Oxygen Species Production in Endothelial Cells. Int J Mol Sci 2019; 20:ijms20071644. [PMID: 30987055 PMCID: PMC6480165 DOI: 10.3390/ijms20071644] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 04/02/2019] [Indexed: 12/31/2022] Open
Abstract
Background: Previous studies demonstrated that calcium/calmodulin (Ca2+/CaM) activates nicotinamide adenine dinucleotide phosphate oxidases (NOX). In endothelial cells, the elevation of intracellular Ca2+ level consists of two components: Ca2+ mobilization from the endoplasmic reticulum (ER) and the subsequent store-operated Ca2+ entry. However, little is known about which component of Ca2+ increase is required to activate NOX in endothelial cells. Here, we investigated the mechanism that regulates NOX-derived reactive oxygen species (ROS) production via a Ca2+/CaM-dependent pathway. Methods: We measured ROS production using a fluorescent indicator in endothelial cells and performed phosphorylation assays. Results: Bradykinin (BK) increased NOX-derived cytosolic ROS. When cells were exposed to BK with either a nominal Ca2+-free or 1 mM of extracellular Ca2+ concentration modified Tyrode’s solution, no difference in BK-induced ROS production was observed; however, chelating of cytosolic Ca2+ by BAPTA/AM or the depletion of ER Ca2+ contents by thapsigargin eliminated BK-induced ROS production. BK-induced ROS production was inhibited by a CaM inhibitor; however, a Ca2+/CaM-dependent protein kinase II (CaMKII) inhibitor did not affect BK-induced ROS production. Furthermore, BK stimulation did not increase phosphorylation of NOX2, NOX4, and NOX5. Conclusions: BK-induced NOX-derived ROS production was mediated via a Ca2+/CaM-dependent pathway; however, it was independent from NOX phosphorylation. This was strictly regulated by ER Ca2+ contents.
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Affiliation(s)
- Ryugo Sakurada
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan.
| | - Keiichi Odagiri
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan.
| | - Akio Hakamata
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan.
| | - Chiaki Kamiya
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan.
| | - Jiazhang Wei
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan.
| | - Hiroshi Watanabe
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan.
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Abstract
SIGNIFICANCE Angiogenesis is the formation of new vessels that sprout from existing vessels. This process is highly complex and requires a coordinated shift of the endothelial phenotype from a quiescent cell in the vessel wall into a migrating or proliferating cell. Such change in the life of the endothelial cell is induced by a variety of factors such as hypoxia, metabolic changes, or cytokines. Recent Advances: Within the last years, it became clear that the cellular redox state and oxidation of signaling molecules or phosphatases are critical modulators in angiogenesis. CRITICAL ISSUES According to the wide variety of stimuli that induce angiogenesis, a complex signaling network is needed to support a coordinated response of the endothelial cell. Reactive oxygen species (ROS) now are second messengers that either directly oxidize a target molecule or initiate a cascade of redox sensitive steps that transmit the signal. Further Directions: For the understanding of redox signaling, it is essential to recognize and accept that ROS do not represent master regulators of angiogenetic processes. They rather modulate existing signal cascades. This review summarizes some current findings on redox signaling in angiogenesis.
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Affiliation(s)
- Katrin Schröder
- 1 Institute for Cardiovascular Physiology, Goethe-University, Frankfurt, Germany.,2 German Center for Cardiovascular Research (DZHK), Rhine-Main, Frankfurt, Germany
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Shirpoor A, Heshmatian B, Tofighi A, Eliasabad SN, Kheradmand F, Zerehpoosh M. Nandrolone administration with or without strenuous exercise increases cardiac fatal genes overexpression, calcium/calmodulin-dependent protein kinaseiiδ, and monoamine oxidase activities and enhances blood pressure in adult wistar rats. Gene 2019; 697:131-137. [PMID: 30802539 DOI: 10.1016/j.gene.2019.02.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 01/23/2019] [Accepted: 02/08/2019] [Indexed: 02/08/2023]
Abstract
Misuse of anabolic androgenic steroids (AAS) increases prevalence of cardiovascular abnormalities in athletes, and the underlying molecular mechanism involved in those abnormalities continues to be investigated. The aim of this study was to investigate the effect of chronic nandrolone exposure on alpha and beta-myosin heavy chain (MHC) isoforms gene expression transition, blood pressure related parameters, calcium/calmodulin-dependent protein kinaseIIδ (CaMKIIδ), and monoamine oxidase (MAO) activities in rats' hearts. It was also planned to evaluate the effect of strenuous exercise on cardiac abnormalities induced by nandrolone. Thirty-two male wistar rats were assigned into four groups, namely control, nandrolone, nandrolone with strenuous exercise, and strenuous exercise groups. Nandrolone consumption significantly increased systolic, diastolic, pulse and dicrotic pressure, mean arterial pressure, as well as the amplitude of first peak (H1). Moreover, exercise combined with nandrolone completely masked this effect. The mRNA expression of β-MHC and the ratio of β -MHC/α -MHC showed a significant increase in the nandrolone and nandrolone with strenuous exercise groups compared to those in the control group. The values of heart tissue calcium/calmoldulin-dependent protein kinase IIδ (CaMKIIδ), and monoamine oxidase (MAO) in the nandrolone, nandrolone with strenuous exercise and exercise groups were significantly higher than those values in the control group. These findings indicate that nandrolone-induced heart and hemodynamic abnormalities may in part be associated with MHC isoform changes and Ca2+ homeostasis changes mediated by increased CaMKIIδ and MAO activities and that these effects can be provoked via strenuous exercise.
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Affiliation(s)
- Alireza Shirpoor
- Department of Physiology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran; Nephrology and Kidney, Transplant Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Behnam Heshmatian
- Department of Physiology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Asghar Tofighi
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Urmia University, Urmia, Iran.
| | - Soheila Najafi Eliasabad
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Urmia University, Urmia, Iran
| | - Fatemeh Kheradmand
- Department of Biochemistry, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Mitra Zerehpoosh
- Department of Biochemistry, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
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57
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Minniti AN, Arriagada H, Zúñiga S, Bravo-Zehnder M, Alfaro IE, Aldunate R. Temporal pattern of neuronal insulin release during Caenorhabditis elegans aging: Role of redox homeostasis. Aging Cell 2019; 18:e12855. [PMID: 30456853 PMCID: PMC6351846 DOI: 10.1111/acel.12855] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 07/24/2018] [Accepted: 09/03/2018] [Indexed: 12/30/2022] Open
Abstract
The insulin‐IGF‐1/DAF‐2 pathway has a central role in the determination of aging and longevity in Caenorhabditis elegans and other organisms. In this paper, we measured neuronal insulin secretion (using INS‐22::Venus) during C. elegans lifespan and monitored how this secretion is modified by redox homeostasis. We showed that INS‐22::Venus secretion fluctuates during the organism lifetime reaching maximum levels in the active reproductive stage. We also demonstrate that long‐lived daf‐2 insulin receptor mutants show remarkable low levels of INS‐22::Venus secretion. In contrast, we found that short‐lived mutant worms that lack the oxidation repair enzyme MSRA‐1 show increased levels of INS‐22::Venus secretion, specifically during the reproductive stage. MSRA‐1 is a target of the insulin‐IGF‐1/DAF‐2 pathway, and the expression of this antioxidant enzyme exclusively in the nervous system rescues the mutant insulin release phenotype and longevity. The msra‐1 mutant phenotype can also be reverted by antioxidant treatment during the active reproductive stage. We showed for the first time that there is a pattern of neuronal insulin release with a noticeable increment during the peak of reproduction. Our results suggest that redox homeostasis can modulate longevity through the regulation of insulin secretion, and that the insulin‐IGF‐1/DAF‐2 pathway could be regulated, at least in part, by a feedback loop. These findings highlight the importance of timing for therapeutic interventions aimed at improving health span.
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Affiliation(s)
- Alicia N. Minniti
- Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas; Pontificia Universidad Católica de Chile; Santiago Chile
| | - Héctor Arriagada
- Escuela de Biotecnología, Facultad de Ciencias; Universidad Santo Tomás; Santiago Chile
| | - Soledad Zúñiga
- Escuela de Biotecnología, Facultad de Ciencias; Universidad Santo Tomás; Santiago Chile
| | - Marcela Bravo-Zehnder
- Facultad de Ciencias, Centro de Biología Celular y Biomedicina; Universidad San Sebastián; Santiago Chile
| | - Iván E. Alfaro
- Departamento de Biología, Facultad de Ciencias Naturales y Exactas; Universidad de Playa Ancha; Valparaíso Chile
- Fundación Ciencia & Vida; Santiago Chile
| | - Rebeca Aldunate
- Escuela de Biotecnología, Facultad de Ciencias; Universidad Santo Tomás; Santiago Chile
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58
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Song J, Yang R, Yang J, Zhou L. Mitochondrial Dysfunction-Associated Arrhythmogenic Substrates in Diabetes Mellitus. Front Physiol 2018; 9:1670. [PMID: 30574091 PMCID: PMC6291470 DOI: 10.3389/fphys.2018.01670] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 11/07/2018] [Indexed: 12/15/2022] Open
Abstract
There is increasing evidence that diabetic cardiomyopathy increases the risk of cardiac arrhythmia and sudden cardiac death. While the detailed mechanisms remain incompletely understood, the loss of mitochondrial function, which is often observed in the heart of patients with diabetes, has emerged as a key contributor to the arrhythmogenic substrates. In this mini review, the pathophysiology of mitochondrial dysfunction in diabetes mellitus is explored in detail, followed by descriptions of several mechanisms potentially linking mitochondria to arrhythmogenesis in the context of diabetic cardiomyopathy.
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Affiliation(s)
- Jiajia Song
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Ruilin Yang
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States.,Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, China
| | - Jing Yang
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Lufang Zhou
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
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Luo Q, Wang X, Liu R, Qiao H, Wang P, Jiang C, Zhang Q, Cao Y, Yu H, Qu L. alpha1A-adrenoceptor is involved in norepinephrine-induced proliferation of pulmonary artery smooth muscle cells via CaMKII signaling. J Cell Biochem 2018; 120:9345-9355. [PMID: 30520144 DOI: 10.1002/jcb.28210] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 11/15/2018] [Indexed: 12/13/2022]
Abstract
Pulmonary arterial hypertension (PAH) is a progressive disease of the pulmonary vasculature characterized by excessive proliferation of pulmonary artery smooth muscle cells (PASMCs). Some studies have demonstrated the sympathetic nervous system is activated in PAH and norepinephrine (NE) released is closely linked with its activation. However, the subtypes of adrenoreceptor (AR) and the downstream molecular cascades which are involved in the proliferation of PASMCs are still unclear. In this study, adult male Wistar rats were exposed to chronic hypoxia and PASMCs were cultured in hypoxic condition. Significant upregulation of α1A -AR was identified by Western blot analysis or immunofluorescence in all of the pulmonary arteries, lung tissues, and cell hypoxic models. Western blot analysis, flow cytometry, and immunofluorescence were applied to detect the roles of α1A -AR in NE mediated proliferation of PASMCs. We revealed 5-methylurapidil (5-MU) reversed NE-induced upregulation of PCNA, CyclinA and CyclinE, more cells from G0 /G1 phase to G2 /M+S phase, enhancement of the microtubule formation. In addition, we found calcium/calmodulin(CaM)-dependent protein kinase type II (CaMKII) pathway was involved in α1A -AR-mediated cell proliferation. [Ca2+ ]i measurements showed that an increase of [Ca2+ ]i caused by NE or/and hypoxia could be blocked by 5-MU in PASMCs. Western blot analysis results demonstrated the augmentation of CaMKII phosphorylation level was caused by hypoxia or NE in pulmonary arteries, lung tissues, and PASMCs. KN62 attenuated NE-induced proliferation of PASMCs under normoxia and hypoxia. In conclusion, those results suggested NE which stimulated α1A -AR-mediated the proliferation of PASMCs, which may be via the CaMKII pathway, and it could be used as a novel treatment strategy in PAH.
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Affiliation(s)
- Qian Luo
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
| | - Xiaoyan Wang
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
| | - Ruxia Liu
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
| | - Hui Qiao
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China.,Department of Gastroenterology, Daqing Oilfield General Hospital, Daqing, China
| | - Peng Wang
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
| | - Chao Jiang
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
| | - Qianlong Zhang
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
| | - Yonggang Cao
- Department of Pharmacology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
| | - Hang Yu
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
| | - Lihui Qu
- Department of Physiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, China
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Cardiac specific PRMT1 ablation causes heart failure through CaMKII dysregulation. Nat Commun 2018; 9:5107. [PMID: 30504773 PMCID: PMC6269446 DOI: 10.1038/s41467-018-07606-y] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 11/02/2018] [Indexed: 02/07/2023] Open
Abstract
Dysregulation of Ca2+/calmodulin-dependent protein kinase (CaMK)II is closely linked with myocardial hypertrophy and heart failure. However, the mechanisms that regulate CaMKII activity are incompletely understood. Here we show that protein arginine methyltransferase 1 (PRMT1) is essential for preventing cardiac CaMKII hyperactivation. Mice null for cardiac PRMT1 exhibit a rapid progression to dilated cardiomyopathy and heart failure within 2 months, accompanied by cardiomyocyte hypertrophy and fibrosis. Consistently, PRMT1 is downregulated in heart failure patients. PRMT1 depletion in isolated cardiomyocytes evokes hypertrophic responses with elevated remodeling gene expression, while PRMT1 overexpression protects against pathological responses to neurohormones. The level of active CaMKII is significantly elevated in PRMT1-deficient hearts or cardiomyocytes. PRMT1 interacts with and methylates CaMKII at arginine residues 9 and 275, leading to its inhibition. Accordingly, pharmacological inhibition of CaMKII restores contractile function in PRMT1-deficient mice. Thus, our data suggest that PRMT1 is a critical regulator of CaMKII to maintain cardiac function. The mechanisms that regulate the activity of Ca2 +/calmodulin-dependent protein kinase II (CaMKII) in the context of heart failure are incompletely understood. Here the authors show that protein arginine methyltransferase 1 (PRMT1) prevents cardiac hyperactivation of CaMKII and heart failure development by methylating CaMKII at arginine residues 9 and 275.
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61
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Rouet‐Benzineb P, Merval R, Polidano E. Effects of hypoestrogenism and/or hyperaldosteronism on myocardial remodeling in female mice. Physiol Rep 2018; 6:e13912. [PMID: 30430766 PMCID: PMC6236131 DOI: 10.14814/phy2.13912] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 09/12/2018] [Accepted: 10/05/2018] [Indexed: 12/18/2022] Open
Abstract
We investigated the potential adverse effects of hyperaldosteronism and/or hypoestrogenism on cardiac phenotype, and examined their combined effects in female mice overexpressing cardiac aldosterone synthase (AS). We focused on some signaling cascades challenging defensive responses to adapt and/or to survive in the face of double deleterious stresses, such as Ca2+ -homeostasis, pro/anti-hypertrophic, endoplasmic reticulum stress (ER stress), pro- or anti-apoptotic effectors, and MAP kinase activation, and redox signaling. These protein expressions were assessed by immunoblotting at 9 weeks after surgery. Female wild type (FWT) and FAS mice were fed with phytoestrogen-free diet; underwent ovariectomy (Ovx) or sham-operation (Sham). Ovx increased gain weight and hypertrophy index. Transthoracic echocardiograghy was performed. Both Ovx-induced heart rate decrease and fractional shortening increase were associated with collagen type III shift. Cardiac estrogen receptor (ERα, ERβ) protein expression levels were downregulated in Ovx mice. Hypoestrogenism increased plasma aldosterone and MR protein expression in FAS mice. Both aldosterone and Ovx played as mirror effects on up and downstream signaling effectors of calcium/redox homeostasis, apoptosis, such as concomitant CaMKII activation and calcineurin down-regulation, MAP kinase inhibition (ERK1/2, p38 MAPK) and Akt activation. The ratio Bcl2/Bax is in favor to promote cell survivor. Finally, myocardium had dynamically orchestrated multiple signaling cascades to restore tolerance to hostile environment thereby contributing to a better maintenance of Ca2+ /redox homeostasis. Ovx-induced collagen type III isoform shift and its upregulation may be important for the biomechanical transduction of the heart and the recovery of cardiac function in FAS mice. OVX antagonized aldosterone signaling pathways.
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Abstract
BACKGROUND Among his major cardiac electrophysiological contributions, Miles Vaughan Williams (1918-2016) provided a classification of antiarrhythmic drugs that remains central to their clinical use. METHODS We survey implications of subsequent discoveries concerning sarcolemmal, sarcoplasmic reticular, and cytosolic biomolecules, developing an expanded but pragmatic classification that encompasses approved and potential antiarrhythmic drugs on this centenary of his birth. RESULTS We first consider the range of pharmacological targets, tracking these through to cellular electrophysiological effects. We retain the original Vaughan Williams Classes I through IV but subcategorize these divisions in light of more recent developments, including the existence of Na+ current components (for Class I), advances in autonomic (often G protein-mediated) signaling (for Class II), K+ channel subspecies (for Class III), and novel molecular targets related to Ca2+ homeostasis (for Class IV). We introduce new classes based on additional targets, including channels involved in automaticity, mechanically sensitive ion channels, connexins controlling electrotonic cell coupling, and molecules underlying longer-term signaling processes affecting structural remodeling. Inclusion of this widened range of targets and their physiological sequelae provides a framework for a modernized classification of established antiarrhythmic drugs based on their pharmacological targets. The revised classification allows for the existence of multiple drug targets/actions and for adverse, sometimes actually proarrhythmic, effects. The new scheme also aids classification of novel drugs under investigation. CONCLUSIONS We emerge with a modernized classification preserving the simplicity of the original Vaughan Williams framework while aiding our understanding and clinical management of cardiac arrhythmic events and facilitating future developments in this area.
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Affiliation(s)
- Ming Lei
- Department of Pharmacology, University of Oxford, United Kingdom (M.L., D.A.T.)
- Key Laboratory of Medical Electrophysiology of the Ministry of Education and Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China (M.L., L.W.)
| | - Lin Wu
- Department of Cardiology, Peking University First Hospital, Beijing, China (L.W.)
- Key Laboratory of Medical Electrophysiology of the Ministry of Education and Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China (M.L., L.W.)
| | - Derek A Terrar
- Department of Pharmacology, University of Oxford, United Kingdom (M.L., D.A.T.)
| | - Christopher L-H Huang
- Physiological Laboratory (C.L.-H.H.), University of Cambridge, United Kingdom
- Department of Biochemistry (C.L.-H.H.). University of Cambridge, United Kingdom
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Coppini R, Ferrantini C, Mugelli A, Poggesi C, Cerbai E. Altered Ca 2+ and Na + Homeostasis in Human Hypertrophic Cardiomyopathy: Implications for Arrhythmogenesis. Front Physiol 2018; 9:1391. [PMID: 30420810 PMCID: PMC6215954 DOI: 10.3389/fphys.2018.01391] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 09/13/2018] [Indexed: 12/12/2022] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is the most common mendelian heart disease, with a prevalence of 1/500. HCM is a primary cause of sudden death, due to an heightened risk of ventricular tachyarrhythmias that often occur in young asymptomatic patients. HCM can slowly progress toward heart failure, either with preserved or reduced ejection fraction, due to worsening of diastolic function. Accumulation of intra-myocardial fibrosis and replacement scars underlies heart failure progression and represents a substrate for sustained arrhythmias in end-stage patients. However, arrhythmias and mechanical abnormalities may occur in hearts with little or no fibrosis, prompting toward functional pathomechanisms. By studying viable cardiomyocytes and trabeculae isolated from inter-ventricular septum samples of non-failing HCM patients with symptomatic obstruction who underwent myectomy operations, we identified that specific abnormalities of intracellular Ca2+ handling are associated with increased cellular arrhytmogenesis and diastolic dysfunction. In HCM cardiomyocytes, diastolic Ca2+ concentration is increased both in the cytosol and in the sarcoplasmic reticulum and the rate of Ca2+ transient decay is slower, while the amplitude of Ca2+-release is preserved. Ca2+ overload is the consequence of an increased Ca2+ entry via L-type Ca2+-current [due to prolongation the action potential (AP) plateau], combined with a reduced rate of Ca2+-extrusion through the Na+/Ca2+ exchanger [due to increased cytosolic (Na+)] and a lower expression of SERCA. Increased late Na+ current (INaL) plays a major role, as it causes both AP prolongation and Na+ overload. Intracellular Ca2+ overload determines an higher frequency of Ca2+ waves leading to delayed-afterdepolarizations (DADs) and premature contractions, but is also linked with the increased diastolic tension and slower relaxation of HCM myocardium. Sustained increase of intracellular [Ca2+] goes hand-in-hand with the increased activation of Ca2+/calmodulin-dependent protein-kinase-II (CaMKII) and augmented phosphorylation of its targets, including Ca2+ handling proteins. In transgenic HCM mouse models, we found that Ca2+ overload, CaMKII and increased INaL drive myocardial remodeling since the earliest stages of disease and underlie the development of hypertrophy, diastolic dysfunction and the arrhythmogenic substrate. In conclusion, diastolic dysfunction and arrhythmogenesis in human HCM myocardium are driven by functional alterations at cellular and molecular level that may be targets of innovative therapies.
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Affiliation(s)
- Raffaele Coppini
- Department of Neuroscience, Psychology, Drug Sciences and Child Health (NEUROFARBA), University of Florence, Florence, Italy
| | - Cecilia Ferrantini
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Alessandro Mugelli
- Department of Neuroscience, Psychology, Drug Sciences and Child Health (NEUROFARBA), University of Florence, Florence, Italy
| | - Corrado Poggesi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Elisabetta Cerbai
- Department of Neuroscience, Psychology, Drug Sciences and Child Health (NEUROFARBA), University of Florence, Florence, Italy
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64
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Karagueuzian HS, Klein U. Wanted: Class VI Antiarrhythmic Drug Action; New Start for a Rational Drug Therapy. ACTA ACUST UNITED AC 2018; 5. [PMID: 31080887 PMCID: PMC6508654 DOI: 10.16966/2379-769x.148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hrayr S Karagueuzian
- Department of Medicine, David Geffen School of Medicine, Los Angeles, California, USA.,Cardiovascular Research Laboratories UCLA, Los Angeles, California, USA
| | - Uwe Klein
- Numerate Inc., San Francisco, California, USA
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Bernardo BC, Ooi JYY, Weeks KL, Patterson NL, McMullen JR. Understanding Key Mechanisms of Exercise-Induced Cardiac Protection to Mitigate Disease: Current Knowledge and Emerging Concepts. Physiol Rev 2018; 98:419-475. [PMID: 29351515 DOI: 10.1152/physrev.00043.2016] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The benefits of exercise on the heart are well recognized, and clinical studies have demonstrated that exercise is an intervention that can improve cardiac function in heart failure patients. This has led to significant research into understanding the key mechanisms responsible for exercise-induced cardiac protection. Here, we summarize molecular mechanisms that regulate exercise-induced cardiac myocyte growth and proliferation. We discuss in detail the effects of exercise on other cardiac cells, organelles, and systems that have received less or little attention and require further investigation. This includes cardiac excitation and contraction, mitochondrial adaptations, cellular stress responses to promote survival (heat shock response, ubiquitin-proteasome system, autophagy-lysosomal system, endoplasmic reticulum unfolded protein response, DNA damage response), extracellular matrix, inflammatory response, and organ-to-organ crosstalk. We summarize therapeutic strategies targeting known regulators of exercise-induced protection and the challenges translating findings from bench to bedside. We conclude that technological advancements that allow for in-depth profiling of the genome, transcriptome, proteome and metabolome, combined with animal and human studies, provide new opportunities for comprehensively defining the signaling and regulatory aspects of cell/organelle functions that underpin the protective properties of exercise. This is likely to lead to the identification of novel biomarkers and therapeutic targets for heart disease.
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Affiliation(s)
- Bianca C Bernardo
- Baker Heart and Diabetes Institute , Melbourne , Australia ; Department of Paediatrics, University of Melbourne , Victoria , Australia ; Department of Diabetes, Central Clinical School, Monash University , Victoria , Australia ; Department of Medicine, Central Clinical School, Monash University , Victoria , Australia ; and Department of Physiology, School of Biomedical Sciences , Victoria , Australia
| | - Jenny Y Y Ooi
- Baker Heart and Diabetes Institute , Melbourne , Australia ; Department of Paediatrics, University of Melbourne , Victoria , Australia ; Department of Diabetes, Central Clinical School, Monash University , Victoria , Australia ; Department of Medicine, Central Clinical School, Monash University , Victoria , Australia ; and Department of Physiology, School of Biomedical Sciences , Victoria , Australia
| | - Kate L Weeks
- Baker Heart and Diabetes Institute , Melbourne , Australia ; Department of Paediatrics, University of Melbourne , Victoria , Australia ; Department of Diabetes, Central Clinical School, Monash University , Victoria , Australia ; Department of Medicine, Central Clinical School, Monash University , Victoria , Australia ; and Department of Physiology, School of Biomedical Sciences , Victoria , Australia
| | - Natalie L Patterson
- Baker Heart and Diabetes Institute , Melbourne , Australia ; Department of Paediatrics, University of Melbourne , Victoria , Australia ; Department of Diabetes, Central Clinical School, Monash University , Victoria , Australia ; Department of Medicine, Central Clinical School, Monash University , Victoria , Australia ; and Department of Physiology, School of Biomedical Sciences , Victoria , Australia
| | - Julie R McMullen
- Baker Heart and Diabetes Institute , Melbourne , Australia ; Department of Paediatrics, University of Melbourne , Victoria , Australia ; Department of Diabetes, Central Clinical School, Monash University , Victoria , Australia ; Department of Medicine, Central Clinical School, Monash University , Victoria , Australia ; and Department of Physiology, School of Biomedical Sciences , Victoria , Australia
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66
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Cao L, Chen Y, Lu L, Liu Y, Wang Y, Fan J, Yin Y. Angiotensin II upregulates fibroblast-myofibroblast transition through Cx43-dependent CaMKII and TGF-β1 signaling in neonatal rat cardiac fibroblasts. Acta Biochim Biophys Sin (Shanghai) 2018; 50:843-852. [PMID: 30060053 DOI: 10.1093/abbs/gmy090] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 07/05/2018] [Indexed: 02/07/2023] Open
Abstract
In cardiac fibroblasts, angiotensin II (Ang II) can increase connexin 43 (Cx43) expression and promote calmodulin-dependent protein kinase II (CaMKII) activation. Cx43 overexpression is crucial for the fibroblast-myofibroblast transition. The main purpose of the present study was to investigate the role of CaMKII in regulating Cx43 expression and to determine whether the CaMKII/Cx43 pathway is essential for controlling fibroblast activation and differentiation. In vivo, 4 weeks of Ang II infusion enhanced CaMKII activation but reduced Cx43 expression in hearts undergoing fibrosis remodeling, while in cultured neonatal rat fibroblasts, CaMKII activation upregulated Cx43 expression via transforming growth factor-beta1 (TGF-β1). CaMKII inhibition by Ang-(1-7) or autocamtide 2-related inhibitory peptide reversed the Ang II-induced changes in Cx43 expression and attenuated Ang II-induced upregulation of alpha smooth muscle actin and TGF-β1 in both Ang II-infused rats and cultured fibroblasts. Based on the in vivo and in vitro experimental results, CaMKII plays a pivotal role in the Ang II-mediated fibroblast-myofibroblast transition by modulating the expressions of TGF-β1 and Cx43. We conclude that Ang II mediates the fibroblast-myofibroblast transition partially via the Ang II/CaMKII/TGF-β1/Cx43 signaling pathway.
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Affiliation(s)
- Li Cao
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yunlin Chen
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li Lu
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yihao Liu
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yaowen Wang
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jinqi Fan
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yuehui Yin
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Yang R, Ernst P, Song J, Liu XM, Huke S, Wang S, Zhang JJ, Zhou L. Mitochondrial-Mediated Oxidative Ca 2+/Calmodulin-Dependent Kinase II Activation Induces Early Afterdepolarizations in Guinea Pig Cardiomyocytes: An In Silico Study. J Am Heart Assoc 2018; 7:e008939. [PMID: 30371234 PMCID: PMC6201444 DOI: 10.1161/jaha.118.008939] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 06/07/2018] [Indexed: 12/23/2022]
Abstract
Background Oxidative stress-mediated Ca2+/calmodulin-dependent protein kinase II (Ca MKII) phosphorylation of cardiac ion channels has emerged as a critical contributor to arrhythmogenesis in cardiac pathology. However, the link between mitochondrial-derived reactive oxygen species (md ROS ) and increased Ca MKII activity in the context of cardiac arrhythmias has not been fully elucidated and is difficult to establish experimentally. Methods and Results We hypothesize that pathological md ROS can cause erratic action potentials through the oxidation-dependent Ca MKII activation pathway. We further propose that Ca MKII -dependent phosphorylation of sarcolemmal slow Na+ channels alone is sufficient to elicit early afterdepolarizations. To test the hypotheses, we expanded our well-established guinea pig cardiomyocyte excitation- contraction coupling, mitochondrial energetics, and ROS - induced- ROS - release model by incorporating oxidative Ca MKII activation and Ca MKII -dependent Na+ channel phosphorylation in silico. Simulations show that md ROS mediated-Ca MKII activation elicits early afterdepolarizations by augmenting the late Na+ currents, which can be suppressed by blocking L-type Ca2+ channels or Na+/Ca2+ exchangers. Interestingly, we found that oxidative Ca MKII activation-induced early afterdepolarizations are sustained even after md ROS has returned to its physiological levels. Moreover, mitochondrial-targeting antioxidant treatment can suppress the early afterdepolarizations, but only if given in an appropriate time window. Incorporating concurrent md ROS -induced ryanodine receptors activation further exacerbates the proarrhythmogenic effect of oxidative Ca MKII activation. Conclusions We conclude that oxidative Ca MKII activation-dependent Na channel phosphorylation is a critical pathway in mitochondria-mediated cardiac arrhythmogenesis.
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Affiliation(s)
- Ruilin Yang
- Key Laboratory for Mechanism Theory and Equipment Design of Ministry of EducationTianjin UniversityTianjinChina
- Department of MedicineUniversity of Alabama at BirminghamAL
| | - Patrick Ernst
- Department of Biomedical EngineeringUniversity of Alabama at BirminghamAL
| | - Jiajia Song
- Department of MedicineUniversity of Alabama at BirminghamAL
| | - Xiaoguang M. Liu
- Department of Biomedical EngineeringUniversity of Alabama at BirminghamAL
| | - Sabine Huke
- Department of MedicineUniversity of Alabama at BirminghamAL
| | - Shuxin Wang
- Key Laboratory for Mechanism Theory and Equipment Design of Ministry of EducationTianjin UniversityTianjinChina
| | - Jianyi Jay Zhang
- Department of Biomedical EngineeringUniversity of Alabama at BirminghamAL
| | - Lufang Zhou
- Department of MedicineUniversity of Alabama at BirminghamAL
- Department of Biomedical EngineeringUniversity of Alabama at BirminghamAL
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68
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Tanaka S, Fujio Y, Nakayama H. Caveolae-Specific CaMKII Signaling in the Regulation of Voltage-Dependent Calcium Channel and Cardiac Hypertrophy. Front Physiol 2018; 9:1081. [PMID: 30131723 PMCID: PMC6090180 DOI: 10.3389/fphys.2018.01081] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/19/2018] [Indexed: 02/04/2023] Open
Abstract
Cardiac hypertrophy is a major risk for the progression of heart failure; however, the underlying molecular mechanisms contributing to this process remain elusive. The caveolae microdomain plays pivotal roles in various cellular processes such as lipid homeostasis, signal transduction, and endocytosis, and also serves as a signaling platform. Although the caveolae microdomain has been postulated to have a major contribution to the development of cardiac pathologies, including cardiac hypertrophy, recent evidence has placed this role into question. Lack of direct evidence and appropriate methods for determining activation of caveolae-specific signaling has thus far limited the ability to obtain a definite answer to the question. In this review, we focus on the potential physiological and pathological roles of the multifunctional kinase Ca2+/calmodulin-dependent kinase II and voltage-dependent L-type calcium channel in the caveolae, toward gaining a better understanding of the contribution of caveolae-based signaling in cardiac hypertrophy.
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Affiliation(s)
- Shota Tanaka
- Laboratory of Clinical Science and Biomedicine, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Yasushi Fujio
- Laboratory of Clinical Science and Biomedicine, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Hiroyuki Nakayama
- Laboratory of Clinical Science and Biomedicine, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
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69
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Russo R, Cattaneo F, Lippiello P, Cristiano C, Zurlo F, Castaldo M, Irace C, Borsello T, Santamaria R, Ammendola R, Calignano A, Miniaci MC. Motor coordination and synaptic plasticity deficits are associated with increased cerebellar activity of NADPH oxidase, CAMKII, and PKC at preplaque stage in the TgCRND8 mouse model of Alzheimer's disease. Neurobiol Aging 2018; 68:123-133. [DOI: 10.1016/j.neurobiolaging.2018.02.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/14/2018] [Accepted: 02/24/2018] [Indexed: 10/17/2022]
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70
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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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Functions and dysfunctions of Ca2+/calmodulin-dependent protein kinase phosphatase (CaMKP/PPM1F) and CaMKP-N/PPM1E. Arch Biochem Biophys 2018; 640:83-92. [DOI: 10.1016/j.abb.2018.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 12/28/2017] [Accepted: 01/04/2018] [Indexed: 12/22/2022]
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72
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Song Y, Belardinelli L. Enhanced basal late sodium current appears to underlie the age-related prolongation of action potential duration in guinea pig ventricular myocytes. J Appl Physiol (1985) 2017; 125:1329-1338. [PMID: 29357519 DOI: 10.1152/japplphysiol.00916.2017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Aging hearts have prolonged QT interval and are vulnerable to oxidative stress. Because the QT interval indirectly reflects the action potential duration (APD), we examined the hypotheses that 1) the APD of ventricular myocytes increases with age; 2) the age-related prolongation of APD is due to an enhancement of basal late Na+ current (INaL); 3) inhibition of INaL may protect aging hearts from arrhythmogenic effects of hydrogen peroxide (H2O2). Experiments were performed on ventricular myocytes isolated from one-month (young) and one-year (old) guinea pigs (GPs). The APD of myocytes from old GPs was significantly longer than that from young GPs and was shortened by the INaL inhibitors GS967 and tetrodotoxin. The magnitude of INaL was significantly larger in myocytes from old than from young GPs. The CaMKII inhibitors KN-93 and AIP and the NaV1.5-channel blocker MTSEA blocked the INaL. There were no significant differences between myocytes from young and old GPs in L-type Ca2+ current and the rapidly- and slowly-activating delayed rectifier K+ currents, although the inward rectifier K+ current was slightly decreased in myocytes from old GPs. H2O2 induced more early afterdepolarizations in myocytes from old than from young GPs. The effect of H2O2 was attenuated by GS967. The results suggest that 1) the APD of myocytes from old GPs is prolonged, 2) a CaMKII-mediated increase in NaV1.5-channel INaL is responsible for the prolongation of APD, and 3) Inhibition of INaL may be beneficial for maintaining electrical stability under oxidative stress in myocytes of old GPs.
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Affiliation(s)
- Yejia Song
- Medicine, University of Florida, United States
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Suppression of Oxidative Stress and Apoptosis in Electrically Stimulated Neonatal Rat Cardiomyocytes by Resveratrol and Underlying Mechanisms. J Cardiovasc Pharmacol 2017; 70:396-404. [DOI: 10.1097/fjc.0000000000000534] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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74
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Late sodium current associated cardiac electrophysiological and mechanical dysfunction. Pflugers Arch 2017; 470:461-469. [DOI: 10.1007/s00424-017-2079-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 09/27/2017] [Accepted: 10/09/2017] [Indexed: 12/19/2022]
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75
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Murthy S, Koval OM, Ramiro Diaz JM, Kumar S, Nuno D, Scott JA, Allamargot C, Zhu LJ, Broadhurst K, Santhana V, Kutschke WJ, Irani K, Lamping KG, Grumbach IM. Endothelial CaMKII as a regulator of eNOS activity and NO-mediated vasoreactivity. PLoS One 2017; 12:e0186311. [PMID: 29059213 PMCID: PMC5653296 DOI: 10.1371/journal.pone.0186311] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 09/28/2017] [Indexed: 01/11/2023] Open
Abstract
The multifunctional Ca2+/calmodulin-dependent protein kinase II (CaMKII) is a serine/threonine kinase important in transducing intracellular Ca2+ signals. While in vitro data regarding the role of CaMKII in the regulation of endothelial nitric oxide synthase (eNOS) are contradictory, its role in endothelial function in vivo remains unknown. Using two novel transgenic models to express CaMKII inhibitor peptides selectively in endothelium, we examined the effect of CaMKII on eNOS activation, NO production, vasomotor tone and blood pressure. Under baseline conditions, CaMKII activation was low in the aortic wall. Consistently, systolic and diastolic blood pressure, heart rate and plasma NO levels were unaltered by endothelial CaMKII inhibition. Moreover, endothelial CaMKII inhibition had no significant effect on NO-dependent vasodilation. These results were confirmed in studies of aortic rings transduced with adenovirus expressing a CaMKII inhibitor peptide. In cultured endothelial cells, bradykinin treatment produced the anticipated rapid influx of Ca2+ and transient CaMKII and eNOS activation, whereas CaMKII inhibition blocked eNOS phosphorylation on Ser-1179 and dephosphorylation at Thr-497. Ca2+/CaM binding to eNOS and resultant NO production in vitro were decreased under CaMKII inhibition. Our results demonstrate that CaMKII plays an important role in transient bradykinin-driven eNOS activation in vitro, but does not regulate NO production, vasorelaxation or blood pressure in vivo under baseline conditions.
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Affiliation(s)
- Shubha Murthy
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
- Iowa City Veterans Affairs Healthcare System, Iowa City, Iowa, United States of America
| | - Olha M. Koval
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
- Iowa City Veterans Affairs Healthcare System, Iowa City, Iowa, United States of America
| | - Juan M. Ramiro Diaz
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Santosh Kumar
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Daniel Nuno
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Jason A. Scott
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Chantal Allamargot
- Central Microscopy Research Facility, Office of Vice President of Research and Economic Development, University of Iowa, Iowa City, Iowa, United States of America
| | - Linda J. Zhu
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Kim Broadhurst
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Velarchana Santhana
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - William J. Kutschke
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Kaikobad Irani
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
- Iowa City Veterans Affairs Healthcare System, Iowa City, Iowa, United States of America
| | - Kathryn G. Lamping
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
- Iowa City Veterans Affairs Healthcare System, Iowa City, Iowa, United States of America
- Department of Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Isabella M. Grumbach
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America
- Iowa City Veterans Affairs Healthcare System, Iowa City, Iowa, United States of America
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Bitirim CV, Tuncay E, Turan B. Demonstration of subcellular migration of CK2α localization from nucleus to sarco(endo)plasmic reticulum in mammalian cardiomyocytes under hyperglycemia. Mol Cell Biochem 2017; 443:25-36. [DOI: 10.1007/s11010-017-3207-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 10/14/2017] [Indexed: 12/16/2022]
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77
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Troupes CD, Wallner M, Borghetti G, Zhang C, Mohsin S, von Lewinski D, Berretta RM, Kubo H, Chen X, Soboloff J, Houser S. Role of STIM1 (Stromal Interaction Molecule 1) in Hypertrophy-Related Contractile Dysfunction. Circ Res 2017; 121:125-136. [PMID: 28592415 DOI: 10.1161/circresaha.117.311094] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 06/02/2017] [Accepted: 06/07/2017] [Indexed: 12/20/2022]
Abstract
RATIONALE Pathological increases in cardiac afterload result in myocyte hypertrophy with changes in myocyte electrical and mechanical phenotype. Remodeling of contractile and signaling Ca2+ occurs in pathological hypertrophy and is central to myocyte remodeling. STIM1 (stromal interaction molecule 1) regulates Ca2+ signaling in many cell types by sensing low endoplasmic reticular Ca2+ levels and then coupling to plasma membrane Orai channels to induce a Ca2+ influx pathway. Previous reports suggest that STIM1 may play a role in cardiac hypertrophy, but its role in electrical and mechanical phenotypic alterations is not well understood. OBJECTIVE To define the contributions of STIM1-mediated Ca2+ influx on electrical and mechanical properties of normal and diseased myocytes, and to determine whether Orai channels are obligatory partners for STIM1 in these processes using a clinically relevant large animal model of hypertrophy. METHODS AND RESULTS Cardiac hypertrophy was induced by slow progressive pressure overload in adult cats. Hypertrophied myocytes had increased STIM1 expression and activity, which correlated with altered Ca2+-handling and action potential (AP) prolongation. Exposure of hypertrophied myocytes to the Orai channel blocker BTP2 caused a reduction of AP duration and reduced diastolic Ca2+ spark rate. BTP2 had no effect on normal myocytes. Forced expression of STIM1 in cultured adult feline ventricular myocytes increased diastolic spark rate and prolonged AP duration. STIM1 expression produced an increase in the amount of Ca2+ stored within the sarcoplasmic reticulum and activated Ca2+/calmodulin-dependent protein kinase II. STIM1 expression also increased spark rates and induced spontaneous APs. STIM1 effects were eliminated by either BTP2 or by coexpression of a dominant negative Orai construct. CONCLUSIONS STIM1 can associate with Orai in cardiac myocytes to produce a Ca2+ influx pathway that can prolong the AP duration and load the sarcoplasmic reticulum and likely contributes to the altered electromechanical properties of the hypertrophied heart.
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Affiliation(s)
- Constantine D Troupes
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Markus Wallner
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Giulia Borghetti
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Chen Zhang
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Sadia Mohsin
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Dirk von Lewinski
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Remus M Berretta
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Hajime Kubo
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Xiongwen Chen
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Jonathan Soboloff
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.)
| | - Steven Houser
- From the Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA (C.D.T., M.W., G.B., C.Z., S.M., R.M.B., H.K., X.C., S.H.); Department of Cardiology, Medical University of Graz, Austria (D.v.L.); and Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University School of Medicine, Philadelphia, PA (J.S.).
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Cappetta D, Esposito G, Coppini R, Piegari E, Russo R, Ciuffreda LP, Rivellino A, Santini L, Rafaniello C, Scavone C, Rossi F, Berrino L, Urbanek K, De Angelis A. Effects of ranolazine in a model of doxorubicin-induced left ventricle diastolic dysfunction. Br J Pharmacol 2017; 174:3696-3712. [PMID: 28320043 DOI: 10.1111/bph.13791] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 03/07/2017] [Accepted: 03/09/2017] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND AND PURPOSE Doxorubicin is a highly effective anticancer drug, but its clinical application is hampered by cardiotoxicity. Asymptomatic diastolic dysfunction can be the earliest manifestation of doxorubicin cardiotoxicity. Therefore, a search for therapeutic intervention that can interfere with early manifestations and possibly prevent later development of cardiotoxicity is warranted. Increased doxorubicin-dependent ROS may explain, in part, Ca2+ and Na+ overload that contributes to diastolic dysfunction and development of heart failure. Therefore, we tested whether the administration of ranolazine, a selective blocker of late Na+ current, immediately after completing doxorubicin therapy, could affect diastolic dysfunction and interfere with the progression of functional decline. EXPERIMENTAL APPROACH Fischer 344 rats received a cumulative dose of doxorubicin of 15 mg·kg-1 over a period of 2 weeks. After the assessment of diastolic dysfunction, the animals were treated with ranolazine (80 mg·kg-1 , daily) for the following 4 weeks. KEY RESULTS While diastolic and systolic function progressively deteriorated in doxorubicin-treated animals, treatment with ranolazine relieved diastolic dysfunction and prevented worsening of systolic function, decreasing mortality. Ranolazine lowered myocardial NADPH oxidase 2 expression and oxidative/nitrative stress. Expression of the Na+ /Ca2+ exchanger 1 and Nav 1.5 channels was reduced and of the sarcoplasmic/endoplasmic reticulum Ca2+ -ATPase 2 protein was increased. In addition, ranolazine lowered doxorubicin-induced hyper-phosphorylation and oxidation of Ca2+ /calmodulin-dependent protein kinase II, and decreased myocardial fibrosis. CONCLUSIONS AND IMPLICATIONS Ranolazine, by the increased Na+ influx, induced by doxorubicin, altered cardiac Ca2+ and Na+ handling and attenuated diastolic dysfunction induced by doxorubicin, thus preventing the progression of cardiomyopathy. LINKED ARTICLES This article is part of a themed section on New Insights into Cardiotoxicity Caused by Chemotherapeutic Agents. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.21/issuetoc.
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Affiliation(s)
- Donato Cappetta
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Grazia Esposito
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Raffaele Coppini
- Department of Neuroscience, Drug Research and Child's Health (NeuroFarBa), Division of Pharmacology, University of Florence, Florence, Italy
| | - Elena Piegari
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Rosa Russo
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Loreta Pia Ciuffreda
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Alessia Rivellino
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Lorenzo Santini
- Department of Neuroscience, Drug Research and Child's Health (NeuroFarBa), Division of Pharmacology, University of Florence, Florence, Italy
| | - Concetta Rafaniello
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Cristina Scavone
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Francesco Rossi
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Liberato Berrino
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Konrad Urbanek
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Antonella De Angelis
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
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Liu B, Liu C, Cong W, Li N, Zhou N, Tang Y, Wei C, Bai H, Zhang Y, Xiao J. Retinoid acid-induced microRNA-31-5p suppresses myogenic proliferation and differentiation by targeting CamkIIδ. Skelet Muscle 2017; 7:8. [PMID: 28526071 PMCID: PMC5437717 DOI: 10.1186/s13395-017-0126-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/02/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND We previously reported that Wnt5a/CaMKIIδ (calcium/calmodulin-dependent protein kinase II delta) pathway was involved in the embryonic tongue deformity induced by excess retinoic acid (RA). Our latest study found that the expression of miR-31-5p, which was predicted to target the 3'UTR of CamkIIδ, was raised in the RA-treated embryonic tongue. Thus, we hypothesized that the excess RA regulated Wnt5a/CaMKIIδ pathway through miR-31-5p in embryonic tongue. METHODS C2C12 myoblast line was employed as an in vitro model to examine the suppression of miR-31-5p on CamkIIδ expression, through which RA impaired the myoblast proliferation and differentiation in embryonic tongue. RESULTS RA stimulated the expression of miR-31-5p in both embryonic tongue and C2C12 myoblasts. Luciferase reporter assay confirmed that the 3'UTR of CamkIIδ was a target of miR-31-5p. MiR-31-5p mimics disrupted CamkIIδ expression, C2C12 proliferation and differentiation as excess RA did, while miR-31-5p inhibitor partially rescued these defects in the presence of RA. CONCLUSIONS Excess RA can stimulate miR-31-5p expression to suppress CamkIIδ, which represses the proliferation and differentiation of tongue myoblasts.
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Affiliation(s)
- Bo Liu
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Chao Liu
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Wei Cong
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Nan Li
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Nan Zhou
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Yi Tang
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Chao Wei
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Han Bai
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Ying Zhang
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
| | - Jing Xiao
- Department of Basic Oral Sciences, College of Stomatology, Dalian Medical University, Dalian, 116044 People’s Republic of China
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Xu D, Li L, Zhou D, Liu D, Hudmon A, Meroueh SO. Structure-Based Target-Specific Screening Leads to Small-Molecule CaMKII Inhibitors. ChemMedChem 2017; 12:660-677. [PMID: 28371191 PMCID: PMC5554713 DOI: 10.1002/cmdc.201600636] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 03/23/2017] [Indexed: 02/06/2023]
Abstract
Target-specific scoring methods are more commonly used to identify small-molecule inhibitors among compounds docked to a target of interest. Top candidates that emerge from these methods have rarely been tested for activity and specificity across a family of proteins. In this study we docked a chemical library into CaMKIIδ, a member of the Ca2+ /calmodulin (CaM)-dependent protein kinase (CaMK) family, and re-scored the resulting protein-compound structures using Support Vector Machine SPecific (SVMSP), a target-specific method that we developed previously. Among the 35 selected candidates, three hits were identified, such as quinazoline compound 1 (KIN-1; N4-[7-chloro-2-[(E)-styryl]quinazolin-4-yl]-N1,N1-diethylpentane-1,4-diamine), which was found to inhibit CaMKIIδ kinase activity at single-digit micromolar IC50 . Activity across the kinome was assessed by profiling analogues of 1, namely 6 (KIN-236; N4-[7-chloro-2-[(E)-2-(2-chloro-4,5-dimethoxyphenyl)vinyl]quinazolin-4-yl]-N1,N1-diethylpentane-1,4-diamine), and an analogue of hit compound 2 (KIN-15; 2-[4-[(E)-[(5-bromobenzofuran-2-carbonyl)hydrazono]methyl]-2-chloro-6-methoxyphenoxy]acetic acid), namely 14 (KIN-332; N-[(E)-[4-(2-anilino-2-oxoethoxy)-3-chlorophenyl]methyleneamino]benzofuran-2-carboxamide), against 337 kinases. Interestingly, for compound 6, CaMKIIδ and homologue CaMKIIγ were among the top ten targets. Among the top 25 targets of 6, IC50 values ranged from 5 to 22 μm. Compound 14 was found to be not specific toward CaMKII kinases, but it does inhibit two kinases with sub-micromolar IC50 values among the top 25. Derivatives of 1 were tested against several kinases including several members of the CaMK family. These data afforded a limited structure-activity relationship study. Molecular dynamics simulations with explicit solvent followed by end-point MM-GBSA free-energy calculations revealed strong engagement of specific residues within the ATP binding pocket, and also changes in the dynamics as a result of binding. This work suggests that target-specific scoring approaches such as SVMSP may hold promise for the identification of small-molecule kinase inhibitors that exhibit some level of specificity toward the target of interest across a large number of proteins.
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Affiliation(s)
- David Xu
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Department of BioHealth Informatics, Indiana University School of Informatics and Computing, Indianapolis, IN, 46202, USA
| | - Liwei Li
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Van Nuys Medical Science Building, MS 4023, 635 Barnhill Drive, Indianapolis, IN, 46202-5122, USA
| | - Donghui Zhou
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Van Nuys Medical Science Building, MS 4023, 635 Barnhill Drive, Indianapolis, IN, 46202-5122, USA
| | - Degang Liu
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Van Nuys Medical Science Building, MS 4023, 635 Barnhill Drive, Indianapolis, IN, 46202-5122, USA
| | - Andy Hudmon
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Van Nuys Medical Science Building, MS 4023, 635 Barnhill Drive, Indianapolis, IN, 46202-5122, USA
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Samy O Meroueh
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Van Nuys Medical Science Building, MS 4023, 635 Barnhill Drive, Indianapolis, IN, 46202-5122, USA
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Indiana University Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
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81
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Screening for novel central nervous system biomarkers in veterans with Gulf War Illness. Neurotoxicol Teratol 2017; 61:36-46. [DOI: 10.1016/j.ntt.2017.03.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 03/02/2017] [Accepted: 03/03/2017] [Indexed: 12/19/2022]
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82
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Mechanistic and therapeutic perspectives for cardiac arrhythmias: beyond ion channels. SCIENCE CHINA-LIFE SCIENCES 2017; 60:348-355. [DOI: 10.1007/s11427-016-9005-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 12/20/2016] [Indexed: 10/19/2022]
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RIPK3 interactions with MLKL and CaMKII mediate oligodendrocytes death in the developing brain. Cell Death Dis 2017; 8:e2629. [PMID: 28230861 PMCID: PMC5386494 DOI: 10.1038/cddis.2017.54] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 01/17/2017] [Accepted: 01/24/2017] [Indexed: 12/20/2022]
Abstract
Oligodendrocyte progenitor cells (OPCs) death is a key contributor to cerebral white matter injury (WMI) in the developing brain. A previous study by our group indicated that receptor-interacting proteins (RIPs) are crucial in mediating necroptosis in developing neurons. However, whether this mechanism is involved in OPCs death is unclear. We aimed to explore the mechanisms of RIP-mediated oligodendrocytes (OLs) death in the developing brain. Oligodendrocytes necroptosis was induced by oxygen-glucose deprivation plus caspase inhibitor zVAD treatment (OGD/zVAD) in vitro. Western blotting and immunofluorescence were used to detect RIPK1, RIPK3, mixed lineage kinase domain-like protein (MLKL), and Ca2+ and calmodulin-dependent protein kinase IIδ (CaMKIIδ). Immunoprecipitation was used to assess the interactions between RIPK3 and RIPK1, MLKL, and CaMKIIδ. Necrostatin-1 was used to disturb the RIPK3-RIPK1 interaction, and siRNA was used to inhibit RIPK3 or MLKL expression. Oligodendrocytes death was examined using PI staining, EM, and cell membrane leakage assays. In vivo, brain damage in neonatal rats was induced by hypoxia-ischemia (HI). This was followed by an examination of myelin development. We found that OGD/zVAD treatment upregulates the expression of RIPK3 and the interaction of RIPK3 with RIPK1, MLKL, and CaMKIIδ. Inhibition of the RIPK3-MLKL or RIPK3-CaMKIIδ interaction attenuates OLs death induced by OGD/zVAD. These protective mechanisms involve the translocation of MLKL to the OLs membrane, and the phosphorylation of CaMKIIδ. However, inhibition of the RIPK3-RIPK1 interaction did not protect OLs death induced by OGD/zVAD. In vivo studies indicated that the disrupted development of myelin was attenuated after the inhibition of RIPK3-MLKL or RIPK3-CaMKIIδ interaction. Taken together, our data indicate that RIPK3 is a key factor in protection against OLs death and abnormal myelin development via its interaction with MLKL and CaMKIIδ after HI. This suggests that RIPK3 may be a potential target for the treatment of WMI in neonates.
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Karagueuzian HS, Pezhouman A, Angelini M, Olcese R. Enhanced Late Na and Ca Currents as Effective Antiarrhythmic Drug Targets. Front Pharmacol 2017; 8:36. [PMID: 28220073 PMCID: PMC5292429 DOI: 10.3389/fphar.2017.00036] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 01/18/2017] [Indexed: 11/30/2022] Open
Abstract
While recent advances clarified the molecular and cellular modes of action of antiarrhythmic drugs (AADs), their link to suppression of dynamical arrhythmia mechanisms remains only partially understood. The current classifications of AADs (Classes I, III, and IV) rely on blocking peak Na, K and L-type calcium currents (ICa,L), with Class II with dominant beta receptor blocking activity and Class V including drugs with diverse classes of actions. The discovery that the calcium and redox sensor, cardiac Ca/calmodulin-dependent protein kinase II (CaMKII) enhances both the late Na (INa-L) and the late ICa,L in patients at high risk of VT/VF provided a new and a rational AAD target. Pathological rise of either or both of INa-L and late ICa,L are demonstrated to promote cellular early afterdepolarizations (EADs) and EAD-mediated triggered activity that can initiate VT/VF in remodeled hearts. Selective inhibition of the INa-L without affecting their peak transients with the highly specific prototype drug, GS-967 suppresses these EAD-mediated VT/VFs. As in the case of INa-L, selective inhibition of the late ICa,L without affecting its peak with the prototype drug, roscovitine suppressed oxidative EAD-mediated VT/VF. These findings indicate that specific blockers of the late inward currents without affecting their peaks (gating modifiers), offer a new and effective AAD class action i.e., “Class VI.” The development of safe drugs with selective Class VI actions provides a rational and effective approach to treat VT/VF particularly in cardiac conditions associated with enhanced CaMKII activity such as heart failure.
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Affiliation(s)
- Hrayr S Karagueuzian
- Translational Arrhythmia Section, David Geffen School of Medicine, University of California, Los AngelesLos Angeles, CA, USA; Cardiovascular Research Laboratory, Departments of Medicine (Cardiology), David Geffen School of Medicine, University of California, Los AngelesLos Angeles, CA, USA
| | - Arash Pezhouman
- Translational Arrhythmia Section, David Geffen School of Medicine, University of California, Los AngelesLos Angeles, CA, USA; Cardiovascular Research Laboratory, Departments of Medicine (Cardiology), David Geffen School of Medicine, University of California, Los AngelesLos Angeles, CA, USA
| | - Marina Angelini
- Department of Anesthesiology and Perioperative Medicine, David Geffen School of Medicine, University of California, Los Angeles Los Angeles, CA, USA
| | - Riccardo Olcese
- Cardiovascular Research Laboratory, Departments of Medicine (Cardiology), David Geffen School of Medicine, University of California, Los AngelesLos Angeles, CA, USA; Department of Anesthesiology and Perioperative Medicine, David Geffen School of Medicine, University of California, Los AngelesLos Angeles, CA, USA; Department of Physiology, David Geffen School of Medicine, University of California, Los AngelesLos Angeles, CA, USA
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85
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Bosetti F, Galis ZS, Bynoe MS, Charette M, Cipolla MJ, Del Zoppo GJ, Gould D, Hatsukami TS, Jones TLZ, Koenig JI, Lutty GA, Maric-Bilkan C, Stevens T, Tolunay HE, Koroshetz W. "Small Blood Vessels: Big Health Problems?": Scientific Recommendations of the National Institutes of Health Workshop. J Am Heart Assoc 2016; 5:JAHA.116.004389. [PMID: 27815267 PMCID: PMC5210346 DOI: 10.1161/jaha.116.004389] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Francesca Bosetti
- National Institute of Neurological Disorders and Stroke, National Institutes of Health (NIH), Bethesda, MD
| | - Zorina S Galis
- National Heart, Lung and Blood Institute, National Institutes of Health (NIH), Bethesda, MD
| | | | - Marc Charette
- National Heart, Lung and Blood Institute, National Institutes of Health (NIH), Bethesda, MD
| | | | | | | | | | - Teresa L Z Jones
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health (NIH), Bethesda, MD
| | - James I Koenig
- National Institute of Neurological Disorders and Stroke, National Institutes of Health (NIH), Bethesda, MD
| | | | - Christine Maric-Bilkan
- National Heart, Lung and Blood Institute, National Institutes of Health (NIH), Bethesda, MD
| | | | - H Eser Tolunay
- National Heart, Lung and Blood Institute, National Institutes of Health (NIH), Bethesda, MD
| | - Walter Koroshetz
- National Institute of Neurological Disorders and Stroke, National Institutes of Health (NIH), Bethesda, MD
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86
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Berchtold MW, Zacharias T, Kulej K, Wang K, Torggler R, Jespersen T, Chen JN, Larsen MR, la Cour JM. The Arrhythmogenic Calmodulin Mutation D129G Dysregulates Cell Growth, Calmodulin-dependent Kinase II Activity, and Cardiac Function in Zebrafish. J Biol Chem 2016; 291:26636-26646. [PMID: 27815504 DOI: 10.1074/jbc.m116.758680] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 11/04/2016] [Indexed: 11/06/2022] Open
Abstract
Calmodulin (CaM) is a Ca2+ binding protein modulating multiple targets, several of which are associated with cardiac pathophysiology. Recently, CaM mutations were linked to heart arrhythmia. CaM is crucial for cell growth and viability, yet the effect of the arrhythmogenic CaM mutations on cell viability, as well as heart rhythm, remains unknown, and only a few targets with relevance for heart physiology have been analyzed for their response to mutant CaM. We show that the arrhythmia-associated CaM mutants support growth and viability of DT40 cells in the absence of WT CaM except for the long QT syndrome mutant CaM D129G. Of the six CaM mutants tested (N53I, F89L, D95V, N97S, D129G, and F141L), three showed a decreased activation of Ca2+/CaM-dependent kinase II, most prominently the D129G CaM mutation, which was incapable of stimulating Thr286 autophosphorylation. Furthermore, the CaM D129G mutation led to bradycardia in zebrafish and an arrhythmic phenotype in a subset of the analyzed zebrafish.
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Affiliation(s)
| | | | - Katarzyna Kulej
- the Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark, and
| | - Kevin Wang
- the Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, California 90095
| | | | - Thomas Jespersen
- the Danish Arrhythmia Research Centre, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Jau-Nian Chen
- the Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, California 90095
| | - Martin R Larsen
- the Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark, and
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87
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Chaube R, Werstuck GH. Mitochondrial ROS versus ER ROS: Which Comes First in Myocardial Calcium Dysregulation? Front Cardiovasc Med 2016; 3:36. [PMID: 27777931 PMCID: PMC5056180 DOI: 10.3389/fcvm.2016.00036] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Accepted: 09/27/2016] [Indexed: 12/20/2022] Open
Affiliation(s)
- Ruchi Chaube
- Thrombosis and Atherosclerosis Research Institute, McMaster University , Hamilton, ON , Canada
| | - Geoff H Werstuck
- Thrombosis and Atherosclerosis Research Institute, McMaster University , Hamilton, ON , Canada
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88
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Chen SR, Zhang WP, Bao JM, Cheng ZB, Yin S. Aristoyunnolin H attenuates extracellular matrix secretion in cardiac fibroblasts by inhibiting calcium influx. Arch Pharm Res 2016; 40:122-130. [PMID: 27704335 DOI: 10.1007/s12272-016-0843-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 09/27/2016] [Indexed: 11/26/2022]
Abstract
Aristoyunnolin H is a novel aristophyllene sesquiterpenoid isolated from the traditional Chinese medicine Aristolochia yunnanensis Franch. The present research was designed to explore the anti-fibrotic effects of aristoyunnolin H in adult rat cardiac fibroblasts (CFs) stimulated with angiotensin II (Ang II). Western blot analysis data showed that aristoyunnolin H reduced the upregulation of fibronectin (FN), connective tissue growth factor and collagen I(Col I) production induced by Ang II in CFs. By studying the dynamic intracellular changes of Ca2+, we further found that while aristoyunnolin H relieved the calcium influx, it has no effect on intracellular calcium store release. Meanwhile, aristoyunnolin H also inhibited the Ang II-stimulated phosphorylation of Ca2+/calmodulin-dependent protein kinase II. In conclusion, aristoyunnolin H may attenuate extracellular matrix secretion in vitro by inhibiting Ang II-induced calcium signaling.
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Affiliation(s)
- Shao-Rui Chen
- Laboratory of Pharmacology and Toxicology, Guangzhou Higher Education Mega Center, School of Pharmaceutical Sciences, Sun Yat-Sen University, 132 East Waihuan Road, Guangzhou, 510006, Guangdong, People's Republic of China.
| | - Wen-Ping Zhang
- Department of Pathogenic Biology, Gannan Medical College, Ganzhou, 341000, Jiangxi, People's Republic of China
| | - Jing-Mei Bao
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Guangzhou Higher Education Mega Center, School of Pharmaceutical Sciences, Sun Yat-sen University, 132 East Waihuan Road, Guangzhou, 510006, Guangdong, People's Republic of China
| | - Zhong-Bin Cheng
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Guangzhou Higher Education Mega Center, School of Pharmaceutical Sciences, Sun Yat-sen University, 132 East Waihuan Road, Guangzhou, 510006, Guangdong, People's Republic of China
| | - Sheng Yin
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Guangzhou Higher Education Mega Center, School of Pharmaceutical Sciences, Sun Yat-sen University, 132 East Waihuan Road, Guangzhou, 510006, Guangdong, People's Republic of China.
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89
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Prasad AM, Ketsawatsomkron P, Nuno DW, Koval OM, Dibbern ME, Venema AN, Sigmund CD, Lamping KG, Grumbach IM. Role of CaMKII in Ang-II-dependent small artery remodeling. Vascul Pharmacol 2016; 87:172-179. [PMID: 27658984 DOI: 10.1016/j.vph.2016.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 08/22/2016] [Accepted: 09/18/2016] [Indexed: 01/21/2023]
Abstract
Angiotensin-II (Ang-II) is a well-established mediator of vascular remodeling. The multifunctional calcium-calmodulin-dependent kinase II (CaMKII) is activated by Ang-II and regulates Erk1/2 and Akt-dependent signaling in cultured smooth muscle cells in vitro. Its role in Ang-II-dependent vascular remodeling in vivo is far less defined. Using a model of transgenic CaMKII inhibition selectively in smooth muscle cells, we found that CaMKII inhibition exaggerated remodeling after chronic Ang-II treatment and agonist-dependent vasoconstriction in second-order mesenteric arteries. These findings were associated with increased mRNA and protein expression of smooth muscle structural proteins. As a potential mechanism, CaMKII reduced serum response factor-dependent transcriptional activity. In summary, our findings identify CaMKII as an important regulator of smooth muscle function in Ang-II hypertension in vivo.
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Affiliation(s)
- Anand M Prasad
- Department of Medicine, Carver College, University of Iowa, Iowa City, United States
| | - Pimonrat Ketsawatsomkron
- Department of Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, United States
| | - Daniel W Nuno
- Department of Medicine, Carver College, University of Iowa, Iowa City, United States; Department of Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, United States
| | - Olha M Koval
- Department of Medicine, Carver College, University of Iowa, Iowa City, United States
| | - Megan E Dibbern
- Department of Medicine, Carver College, University of Iowa, Iowa City, United States
| | - Ashlee N Venema
- Department of Medicine, Carver College, University of Iowa, Iowa City, United States
| | - Curt D Sigmund
- Department of Medicine, Carver College, University of Iowa, Iowa City, United States; Department of Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, United States; Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, United States
| | - Kathryn G Lamping
- Department of Medicine, Carver College, University of Iowa, Iowa City, United States; Department of Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, United States; Iowa City VA Healthcare System, Iowa City, United States
| | - Isabella M Grumbach
- Department of Medicine, Carver College, University of Iowa, Iowa City, United States; Iowa City VA Healthcare System, Iowa City, United States.
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90
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Ho HT, Belevych AE, Liu B, Bonilla IM, Radwański PB, Kubasov IV, Valdivia HH, Schober K, Carnes CA, Györke S. Muscarinic Stimulation Facilitates Sarcoplasmic Reticulum Ca Release by Modulating Ryanodine Receptor 2 Phosphorylation Through Protein Kinase G and Ca/Calmodulin-Dependent Protein Kinase II. Hypertension 2016; 68:1171-1178. [PMID: 27647848 DOI: 10.1161/hypertensionaha.116.07666] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Accepted: 08/21/2016] [Indexed: 01/01/2023]
Abstract
Although the effects and the underlying mechanism of sympathetic stimulation on cardiac Ca handling are relatively well established both in health and disease, the modes of action and mechanisms of parasympathetic modulation are poorly defined. Here, we demonstrate that parasympathetic stimulation initiates a novel mode of excitation-contraction coupling that enhances the efficiency of cardiac sarcoplasmic reticulum Ca store utilization. This efficient mode of excitation-contraction coupling involves reciprocal changes in the phosphorylation of ryanodine receptor 2 at Ser-2808 and Ser-2814. Specifically, Ser-2808 phosphorylation was mediated by muscarinic receptor subtype 2 and activation of PKG (protein kinase G), whereas dephosphorylation of Ser-2814 involved activation of muscarinic receptor subtype 3 and decreased reactive oxygen species-dependent activation of CaMKII (Ca/calmodulin-dependent protein kinase II). The overall effect of these changes in phosphorylation of ryanodine receptor 2 is an increase in systolic Ca release at the low sarcoplasmic reticulum Ca content and a paradoxical reduction in aberrant Ca leak. Accordingly, cholinergic stimulation of cardiomyocytes isolated from failing hearts improved Ca cycling efficiency by restoring altered ryanodine receptor 2 phosphorylation balance.
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Affiliation(s)
- Hsiang-Ting Ho
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Andriy E Belevych
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Bin Liu
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Ingrid M Bonilla
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Przemysław B Radwański
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Igor V Kubasov
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Héctor H Valdivia
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Karsten Schober
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Cynthia A Carnes
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.)
| | - Sándor Györke
- From the Department of Physiology and Cell Biology (H.-T.H., A.E.B., B.L., P.B.R., S.G.), College of Pharmacy (I.M.B., P.B.R., C.A.C.), and College of Veterinary Medicine (K.S.), The Ohio State University, Columbus; Davis Heart and Lung Research Institute, Columbus, OH (H.-T.H., A.E.B., B.L., I.M.B., P.B.R., C.A.C., S.G.); Department of Medicine, Duke University, Durham, NC (H.-T.H.); Laboratory of Neuromuscular Physiology, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Petersburg, Russia (I.V.K.); and Center for Arrhythmia Research, Cardiovascular Division of the Department of Internal Medicine, University of Michigan, Ann Arbor (H.H.V.).
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91
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Singh R, Banerjee C, Ray A, Rajamani P, Mazumder S. Fluoride-induced headkidney macrophage cell apoptosis involves activation of the CaMKII g-ERK 1/2-caspase-8 axis: the role of superoxide in initiating the apoptotic cascade. Toxicol Res (Camb) 2016; 5:1477-1489. [PMID: 30090451 DOI: 10.1039/c6tx00206d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 07/22/2016] [Indexed: 11/21/2022] Open
Abstract
Fluoride is known to induce apoptosis though the mechanisms remain obscure. The aim of the present study was to understand the underlying molecular mechanisms of fluoride-induced apoptosis using fish headkidney macrophages (HKMs). Exposure to fluoride triggered HKM cell apoptosis as evidenced by Hoechst 333432 and AnnexinV-propidium iodide staining, the presence of an internucleosomal DNA ladder and the comet assay. Our results suggest the influx of extra-cellular Ca2+ to be an initial event in fluoride-induced HKM cell apoptosis. We observed persistently elevated levels of superoxide anions and our inhibitor studies with EGTA suggested the primal role of the Ca2+ flux in triggering superoxide production in fluoride-exposed HKM cells. Fluoride exposure led to elevated levels of Ca2+/CaM dependent protein kinase II gamma (CaMKIIg) and pre-treatment with the inhibitor KN-93 but not its inactive structural analogue KN-92 reduced the number of apoptotic cells establishing the pro-apoptotic role of CaMKIIg in fluoride-induced HKM cell apoptosis. We report that the sustained superoxide generation is primarily responsible for the increased CaMKIIg levels observed in fluoride-exposed HKM cells. Our inhibitor studies further implicated CaMKIIg in the activation of extracellular signal-regulated kinases 1 and 2 (ERK 1/2) culminating in caspase-8/caspase-3 mediated apoptosis of HKM cells. We conclude that fluoride-induced apoptosis is largely dependent on Ca2+ induced superoxide generation leading to elevation in CaMKIIg which in turn induces the phosphorylation of ERK 1/2 and downstream activation of extrinsic caspase cascade in HKM cells.
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Affiliation(s)
- Rashmi Singh
- Immunobiology Laboratory , Department of Zoology , University of Delhi , Delhi 110 007 , India . ; ; Tel: +91-11-27667985
| | - Chaitali Banerjee
- Immunobiology Laboratory , Department of Zoology , University of Delhi , Delhi 110 007 , India . ; ; Tel: +91-11-27667985
| | - Atish Ray
- Immunobiology Laboratory , Department of Zoology , University of Delhi , Delhi 110 007 , India . ; ; Tel: +91-11-27667985
| | - Paulraj Rajamani
- School of Environmental Sciences , Jawaharlal Nehru University , Delhi , India
| | - Shibnath Mazumder
- Immunobiology Laboratory , Department of Zoology , University of Delhi , Delhi 110 007 , India . ; ; Tel: +91-11-27667985
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92
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Toussaint F, Charbel C, Allen BG, Ledoux J. Vascular CaMKII: heart and brain in your arteries. Am J Physiol Cell Physiol 2016; 311:C462-78. [PMID: 27306369 DOI: 10.1152/ajpcell.00341.2015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 06/14/2016] [Indexed: 01/02/2023]
Abstract
First characterized in neuronal tissues, the multifunctional calcium/calmodulin-dependent protein kinase II (CaMKII) is a key signaling component in several mammalian biological systems. Its unique capacity to integrate various Ca(2+) signals into different specific outcomes is a precious asset to excitable and nonexcitable cells. Numerous studies have reported roles and mechanisms involving CaMKII in brain and heart tissues. However, corresponding functions in vascular cell types (endothelium and vascular smooth muscle cells) remained largely unexplored until recently. Investigation of the intracellular Ca(2+) dynamics, their impact on vascular cell function, the regulatory processes involved and more recently the spatially restricted oscillatory Ca(2+) signals and microdomains triggered significant interest towards proteins like CaMKII. Heteromultimerization of CaMKII isoforms (four isoforms and several splice variants) expands this kinase's peculiar capacity to decipher Ca(2+) signals and initiate specific signaling processes, and thus controlling cellular functions. The physiological functions that rely on CaMKII are unsurprisingly diverse, ranging from regulating contractile state and cellular proliferation to Ca(2+) homeostasis and cellular permeability. This review will focus on emerging evidence of CaMKII as an essential component of the vascular system, with a focus on the kinase isoform/splice variants and cellular system studied.
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Affiliation(s)
- Fanny Toussaint
- Research Center, Montreal Heart Institute, Montreal, Quebec, Canada; Department of Molecular and Integrative Physiology, Université de Montréal, Montreal Quebec, Canada
| | - Chimène Charbel
- Research Center, Montreal Heart Institute, Montreal, Quebec, Canada; Department of Pharmacology, Université de Montréal, Montreal Quebec, Canada
| | - Bruce G Allen
- Research Center, Montreal Heart Institute, Montreal, Quebec, Canada; Department of Medicine, Université de Montréal, Montreal Quebec, Canada; and Department of Biochemistry and Molecular Medicine, Université de Montréal, Montreal Quebec, Canada
| | - Jonathan Ledoux
- Research Center, Montreal Heart Institute, Montreal, Quebec, Canada; Department of Medicine, Université de Montréal, Montreal Quebec, Canada; and
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93
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Foteinou PT, Greenstein JL, Winslow RL. Mechanistic Investigation of the Arrhythmogenic Role of Oxidized CaMKII in the Heart. Biophys J 2016; 109:838-49. [PMID: 26287635 DOI: 10.1016/j.bpj.2015.06.064] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 05/16/2015] [Accepted: 06/30/2015] [Indexed: 10/23/2022] Open
Abstract
Oxidative stress and calcium (Ca(2+))/calmodulin (CaM)-dependent protein kinase II (CaMKII) both play important roles in the pathogenesis of cardiac disease. Although the pathophysiological relevance of reactive oxygen species (ROS) and CaMKII has been appreciated for some time, recent work has shown that ROS can directly oxidize CaMKII, leading to its persistent activity and an increase of the likelihood of cellular arrhythmias such as early afterdepolarizations (EADs). Because CaMKII modulates the function of many proteins involved in excitation-contraction coupling, elucidation of its role in cardiac function, in both healthy and oxidative stress conditions, is challenging. To investigate this role, we have developed a model of CaMKII activation that includes both the phosphorylation-dependent and the newly identified oxidation-dependent activation pathways. This model is incorporated into our previous local-control model of the cardiac myocyte that describes excitation-contraction coupling via stochastic simulation of individual Ca(2+) release units and CaMKII-mediated phosphorylation of L-type Ca(2+) channels (LCCs), ryanodine receptors and sodium (Na(+)) channels. The model predicts the experimentally measured slow-rate dependence of H2O2-induced EADs. Upon increased H2O2, simulations suggest that selective activation of late Na(+) current (INaL), although it prolongs action potential duration, is not by itself sufficient to produce EADs. Similar results are obtained if CaMKII effects on LCCs and ryanodine receptors are considered separately. However, EADs emerge upon simultaneous activation of both LCCs and Na(+) channels. Further modeling results implicate activation of the Na(+)-Ca(2+) exchanger (NCX) as an important player in the generation of EADs. During bradycardia, the emergence of H2O2-induced EADs was correlated with a shift in the timing of NCX current reversal toward the plateau phase earlier in the action potential. Using the timing of NCX current reversal as an indicator event for EADs, the model identified counterintuitive ionic changes-difficult to experimentally dissect-that have the greatest influence on ROS-related arrhythmia propensity.
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Affiliation(s)
- Panagiota T Foteinou
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Joseph L Greenstein
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Raimond L Winslow
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland.
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94
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Shabtay O, Breitbart H. CaMKII prevents spontaneous acrosomal exocytosis in sperm through induction of actin polymerization. Dev Biol 2016; 415:64-74. [PMID: 27178669 DOI: 10.1016/j.ydbio.2016.05.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 05/08/2016] [Accepted: 05/09/2016] [Indexed: 02/01/2023]
Abstract
In order to interact with the egg and undergo acrosomal exocytosis or the acrosome reaction (AR), mammalian spermatozoa must undergo a series of biochemical changes in the female reproductive tract, collectively called capacitation. We showed that F-actin is formed during sperm capacitation and fast depolymerization occurs prior to the AR. We hypothesized that F-actin protects the sperm from undergoing spontaneous-AR (sAR) which decreases fertilization rate. We show that activation of the actin-severing protein gelsolin induces a significant increase in sAR. Moreover, inhibition of CaMKII or PLD during sperm capacitation, caused an increase in sAR and inhibition of F-actin formation. Spermine, which leads to PLD activation, was able to reverse the effects of CaMKII inhibition on sAR-increase and F-actin-decrease. Furthermore, the increase in sAR and the decrease in F-actin caused by the inactivation of the PLD-pathway, were reversed by activation of CaMKII using H2O2 or by inhibiting protein phosphatase 1 which enhance the phosphorylation and oxidation states of CaMKII. These results indicate that two distinct pathways lead to F-actin formation in the sperm capacitation process which prevents the occurrence of sAR.
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Affiliation(s)
- Ortal Shabtay
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Haim Breitbart
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel.
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95
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Daniels L, Bell JR, Delbridge LMD, McDonald FJ, Lamberts RR, Erickson JR. The role of CaMKII in diabetic heart dysfunction. Heart Fail Rev 2016. [PMID: 26198034 DOI: 10.1007/s10741-015-9498-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Diabetes mellitus (DM) is an increasing epidemic that places a significant burden on health services worldwide. The incidence of heart failure (HF) is significantly higher in diabetic patients compared to non-diabetic patients. One underlying mechanism proposed for the link between DM and HF is activation of calmodulin-dependent protein kinase (CaMKIIδ). CaMKIIδ mediates ion channel function and Ca(2+) handling during excitation-contraction and excitation-transcription coupling in the myocardium. CaMKIIδ activity is up-regulated in the myocardium of diabetic patients and mouse models of diabetes, where it promotes pathological signaling that includes hypertrophy, fibrosis and apoptosis. Pharmacological inhibition and knockout models of CaMKIIδ have shown some promise of a potential therapeutic benefit of CaMKIIδ inhibition, with protection against cardiac hypertrophy and apoptosis reported. This review will highlight the pathological role of CaMKIIδ in diabetes and discuss CaMKIIδ as a therapeutic target in DM, and also the effects of exercise on CaMKIIδ.
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Affiliation(s)
- Lorna Daniels
- Department of Physiology, University of Otago, PO Box 56, Dunedin, New Zealand
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96
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Novel Roles for Peroxynitrite in Angiotensin II and CaMKII Signaling. Sci Rep 2016; 6:23416. [PMID: 27079272 PMCID: PMC4832198 DOI: 10.1038/srep23416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 03/07/2016] [Indexed: 12/28/2022] Open
Abstract
Ca2+/calmodulin-dependent protein kinase II (CaMKII) oxidation controls excitability and viability. While hydrogen peroxide (H2O2) affects Ca2+-activated CaMKII in vitro, Angiotensin II (Ang II)-induced CaMKIIδ signaling in cardiomyocytes is Ca2+ independent and requires NADPH oxidase-derived superoxide, but not its dismutation product H2O2. To better define the biological regulation of CaMKII activation and signaling by Ang II, we evaluated the potential for peroxynitrite (ONOO−) to mediate CaMKII activation and downstream Kv4.3 channel mRNA destabilization by Ang II. In vitro experiments show that ONOO− oxidizes and modestly activates pure CaMKII in the absence of Ca2+/CaM. Remarkably, this apokinase stimulation persists after mutating known oxidation targets (M281, M282, C290), suggesting a novel mechanism for increasing baseline Ca2+-independent CaMKII activity. The role of ONOO− in cardiac and neuronal responses to Ang II was then tested by scavenging ONOO− and preventing its formation by inhibiting nitric oxide synthase. Both treatments blocked Ang II effects on Kv4.3, tyrosine nitration and CaMKIIδ oxidation and activation. Together, these data show that ONOO− participates in Ang II-CaMKII signaling. The requirement for ONOO− in transducing Ang II signaling identifies ONOO−, which has been viewed as a reactive damaging byproduct of superoxide and nitric oxide, as a mediator of GPCR-CaMKII signaling.
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97
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Bertagnolli M, Dios A, Béland-Bonenfant S, Gascon G, Sutherland M, Lukaszewski MA, Cloutier A, Paradis P, Schiffrin EL, Nuyt AM. Activation of the Cardiac Renin-Angiotensin System in High Oxygen-Exposed Newborn Rats: Angiotensin Receptor Blockade Prevents the Developmental Programming of Cardiac Dysfunction. Hypertension 2016; 67:774-82. [PMID: 26857347 DOI: 10.1161/hypertensionaha.115.06745] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 01/07/2016] [Indexed: 11/16/2022]
Abstract
Newborn rats exposed to high oxygen (O2), mimicking preterm birth-related neonatal stress, develop later in life cardiac hypertrophy, dysfunction, fibrosis, and activation of the renin-angiotensin system. Cardiac renin-angiotensin system activation in O2-exposed adult rats is characterized by an imbalance in angiotensin (Ang) receptors type 1/2 (AT1/2), with prevailing AT1 expression. To study the role of renin-angiotensin system in the developmental programming of cardiac dysfunction, we assessed Ang receptor expression during neonatal high O2 exposure and whether AT1 receptor blockade prevents cardiac alterations in early adulthood. Sprague-Dawley newborn rats were kept with their mother in 80% O2 or room air (control) from days 3 to 10 (P3-P10) of life. Losartan or water was administered by gavage from P8 to P10 (n=9/group). Rats were studied at P3 (before O2 exposure), P5, P10 (end of O2), and P28. Losartan treatment had no impact on growth or kidney development. AT1 and Ang type 2 receptors were upregulated in the left ventricle by high O2 exposure (P5 and P10), which was prevented by Losartan treatment at P10. Losartan prevented the cardiac AT1/2 imbalance at P28. Losartan decreased cardiac hypertrophy and fibrosis and improved left ventricle fraction of shortening in P28 O2-exposed rats, which was associated with decreased oxidation of calcium/calmodulin-dependent protein kinase II, inhibition of the transforming growth factor-β/SMAD3 pathway, and upregulation of cardiac angiotensin-converting enzyme 2. In conclusion, short-term Ang II blockade during neonatal high O2 prevents the development of cardiac alterations later in life in rats. These findings highlight the key role of neonatal renin-angiotensin system activation in the developmental programming of cardiac dysfunction induced by deleterious neonatal conditions.
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Affiliation(s)
- Mariane Bertagnolli
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Anne Dios
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Sarah Béland-Bonenfant
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Gabrielle Gascon
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Megan Sutherland
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Marie-Amélie Lukaszewski
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Anik Cloutier
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Pierre Paradis
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Ernesto L Schiffrin
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.)
| | - Anne Monique Nuyt
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada (M.B., A.D., S.B.-B., G.G., M.S., M.-A.L., A.C., A.M.N.); and Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, McGill University, Montreal, Quebec, Canada (P.P., E.L.S.).
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98
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Datta D, Khatri P, Banerjee C, Singh A, Meena R, Saha DR, Raman R, Rajamani P, Mitra A, Mazumder S. Calcium and Superoxide-Mediated Pathways Converge to Induce Nitric Oxide-Dependent Apoptosis in Mycobacterium fortuitum-Infected Fish Macrophages. PLoS One 2016; 11:e0146554. [PMID: 26752289 PMCID: PMC4713470 DOI: 10.1371/journal.pone.0146554] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 12/19/2015] [Indexed: 12/31/2022] Open
Abstract
Mycobacterium fortuitum causes ‘mycobacteriosis’ in wide range of hosts although the mechanisms remain largely unknown. Here we demonstrate the role of calcium (Ca+2)-signalling cascade on M. fortuitum-induced apoptosis in headkidney macrophages (HKM) of Clarias sp. M. fortuitum could trigger intracellular-Ca+2 influx leading to the activation of calmodulin (CaM), protein kinase C alpha (PKCα) and Calmodulin kinase II gamma (CaMKIIg). Gene silencing and inhibitor studies established the role of CaM in M. fortuitum pathogenesis. We noted that CaMKIIg activation is regulated by CaM as well as PKCα-dependent superoxide anions. This is altogether first report of oxidised CaMKIIg in mycobacterial infections. Our studies with targeted-siRNA and pharmacological inhibitors implicate CaMKIIg to be pro-apoptotic and critical for the activation of extra-cellular signal regulated kinase 1/2 (ERK1/2). Inhibiting the ERK1/2 pathway attenuated nitric oxide synthase 2 (NOS2)-induced nitric oxide (NO) production. Conversely, inhibiting the NOS2-NO axis by specific-siRNA and inhibitors down-regulated ERK1/2 activation suggesting the crosstalk between ERK1/2 and NO is essential for pathogenesis induced by the bacterium. Silencing the NOS2-NO axis enhanced intracellular bacterial survival and attenuated caspase-8 mediated activation of caspase-3 in the infected HKM. Our findings unveil hitherto unknown mechanism of M. fortuitum pathogenesis. We propose that M. fortuitum triggers intracellular Ca+2 elevations resulting in CaM activation and PKCα-mediated superoxide generation. The cascade converges in common pathway mediated by CaMKIIg resulting in the activation of ERK1/2-NOS2 axis. The crosstalk between ERK1/2 and NO shifts the balance in favour of caspase dependent apoptosis of M. fortuitum-infected HKM.
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Affiliation(s)
- Debika Datta
- Immunobiology Laboratory, Department of Zoology, University of Delhi, Delhi, India
| | - Preeti Khatri
- Immunobiology Laboratory, Department of Zoology, University of Delhi, Delhi, India
| | - Chaitali Banerjee
- Immunobiology Laboratory, Department of Zoology, University of Delhi, Delhi, India
| | - Ambika Singh
- Gut Biology Laboratory, Department of Zoology, University of Delhi, Delhi, India
| | - Ramavatar Meena
- School of Environmental Sciences, Jawaharlal Nehru University, Delhi, India
| | - Dhira Rani Saha
- Microscopy Laboratory, National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Rajagopal Raman
- Gut Biology Laboratory, Department of Zoology, University of Delhi, Delhi, India
| | - Paulraj Rajamani
- School of Environmental Sciences, Jawaharlal Nehru University, Delhi, India
| | - Abhijit Mitra
- Genome Analysis Laboratory, Animal Division, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | - Shibnath Mazumder
- Immunobiology Laboratory, Department of Zoology, University of Delhi, Delhi, India
- * E-mail:
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99
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Zhang T, Zhang Y, Cui M, Jin L, Wang Y, Lv F, Liu Y, Zheng W, Shang H, Zhang J, Zhang M, Wu H, Guo J, Zhang X, Hu X, Cao CM, Xiao RP. CaMKII is a RIP3 substrate mediating ischemia- and oxidative stress-induced myocardial necroptosis. Nat Med 2016; 22:175-82. [PMID: 26726877 DOI: 10.1038/nm.4017] [Citation(s) in RCA: 556] [Impact Index Per Article: 69.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 11/25/2015] [Indexed: 12/22/2022]
Abstract
Regulated necrosis (necroptosis) and apoptosis are crucially involved in severe cardiac pathological conditions, including myocardial infarction, ischemia-reperfusion injury and heart failure. Whereas apoptotic signaling is well defined, the mechanisms that underlie cardiomyocyte necroptosis remain elusive. Here we show that receptor-interacting protein 3 (RIP3) triggers myocardial necroptosis, in addition to apoptosis and inflammation, through activation of Ca(2+)-calmodulin-dependent protein kinase (CaMKII) rather than through the well-established RIP3 partners RIP1 and MLKL. In mice, RIP3 deficiency or CaMKII inhibition ameliorates myocardial necroptosis and heart failure induced by ischemia-reperfusion or by doxorubicin treatment. RIP3-induced activation of CaMKII, via phosphorylation or oxidation or both, triggers opening of the mitochondrial permeability transition pore and myocardial necroptosis. These findings identify CaMKII as a new RIP3 substrate and delineate a RIP3-CaMKII-mPTP myocardial necroptosis pathway, a promising target for the treatment of ischemia- and oxidative stress-induced myocardial damage and heart failure.
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Affiliation(s)
- Ting Zhang
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Yan Zhang
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Mingyao Cui
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Li Jin
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Yimei Wang
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Fengxiang Lv
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Yuli Liu
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Wen Zheng
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Haibao Shang
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Jun Zhang
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Mao Zhang
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Hongkun Wu
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Jiaojiao Guo
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Xiuqin Zhang
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Xinli Hu
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Chun-Mei Cao
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China
| | - Rui-Ping Xiao
- Institute of Molecular Medicine, Peking University, Beijing, China.,State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, China.,Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China.,Beijing City Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing, China
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100
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Wang X, Pan T. Methionine Mistranslation Bypasses the Restraint of the Genetic Code to Generate Mutant Proteins with Distinct Activities. PLoS Genet 2015; 11:e1005745. [PMID: 26709516 PMCID: PMC4692448 DOI: 10.1371/journal.pgen.1005745] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 11/25/2015] [Indexed: 01/01/2023] Open
Abstract
Although mistranslation is commonly believed to be deleterious, recent evidence indicates that mistranslation can be actively regulated and be beneficial in stress response. Methionine mistranslation in mammalian cells is regulated by reactive oxygen species where cells deliberately alter the proteome through incorporating Met at non-Met positions to enhance oxidative stress response. However, it was not known whether specific, mistranslated mutant proteins have distinct activities from the wild-type protein whose sequence is restrained by the genetic code. Here, we show that Met mistranslation with and without Ca2+ overload generates specific mutant Ca2+/calmodulin-dependent protein kinase II (CaMKII) proteins substituting non-Met with Met at multiple locations. Compared to the genetically encoded wild-type CaMKII, specific mutant CaMKIIs can have distinct activation profiles, intracellular localization and enhanced phenotypes. Our results demonstrate that Met-mistranslation, or “Met-scan” can indeed generate mutant proteins in cells that expand the activity profile of the wild-type protein, and provide a molecular mechanism for the role of regulated mistranslation. Methionine-mistranslation is a recently discovered phenomenon where mammalian cells deliberately mischarge non-Met-tRNAs with amino acid methionine in unstressed cells and in response to innate immune and chemically triggered oxidative stress. These mischarged tRNAs are used in translation to generate mutant proteins containing non-Met to Met substitutions. Accumulating evidence shows that cells employ regulated mistranslation to enhance response to oxidative and other stresses. However, it was unknown whether any specific mutant proteins generated in mistranslation truly have distinct activities as the wild-type protein. Here, we identify and characterize naturally occurring Met-mistranslated proteins in human cells and show that specific Met-mistranslated proteins can have very distinct properties compared to the wild-type protein in vitro and in vivo. For the Ca2+/calmodulin-dependent protein kinase II (CaMKII), Met-mistranslated CaMKII show significant differences in catalytic activities, subcellular localization and elevated caspase-3 activity from the wild-type CaMKII. Our results provide a molecular mechanism on how mistranslation is used as an adaptive mechanism to stress, and establish Met-mistranslation as a nature’s way to overcome the restraint on the protein sequence by the genetic code.
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Affiliation(s)
- Xiaoyun Wang
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois, United States of America
- * E-mail: (XW); (TP)
| | - Tao Pan
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois, United States of America
- * E-mail: (XW); (TP)
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