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Lu G, Tang Y, Chen O, Guo Y, Xiao M, Wang J, Liu Q, Li J, Gao T, Zhang X, Zhang J, Cheng Q, Kuang R, Gu J. Aberrant activation of p53-TRIB3 axis contributes to diabetic myocardial insulin resistance and sulforaphane protection. J Adv Res 2024:S2090-1232(24)00307-2. [PMID: 39069209 DOI: 10.1016/j.jare.2024.07.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 07/02/2024] [Accepted: 07/25/2024] [Indexed: 07/30/2024] Open
Abstract
INTRODUCTION Insulin resistance (IR) is associated with multiple pathological features. Although p53- or TRIB3-orchestrated IR is extensively studied in adipose tissue and liver, the role of p53-TRIB3 axis in myocardial IR remains unknown, and more importantly target-directed therapies of myocardial IR are missing. OBJECTIVES Considering the beneficial effects of sulforaphane (SFN) on cardiovascular health, it is of particular interest to explore whether SFN protects against myocardial IR with a focus on the regulatory role of p53-TRIB3 axis. METHODS Mouse models including cardiac specific p53-overexpressing transgenic (p53-cTg) mice and Trib3 knockout (Trib3-KO) mice, combined with primary cardiomyocytes treated with p53 activator (nutlin-3a) and inhibitor (pifithrin-α, PFT-α), or transfected with p53-shRNA and Trib3-shRNA, followed by multiple molecular biological methodologies, were used to investigate the role of p53-TRIB3 axis in SFN actions on myocardial IR. RESULTS Here, we report that knockdown of p53 rescued cardiac insulin-stimulated AKT phosphorylation, while up-regulation of p53 by nutlin-3a or p53-cTg mice blunted insulin sensitivity in cardiomyocytes under diabetic conditions. Diabetic attenuation of AKT-mediated cardiac insulin signaling was markedly reversed by SFN in p53-Tgfl/fl mice, but not in p53-cTg mice. Importantly, we identified TRIB3 was elevated in p53-cTg diabetic mice, and confirmed the physical interaction between p53 and TRIB3. Trib3-KO diabetic mice displayed improved insulin sensitivity in the heart. More specifically, the AMPKα-triggered CHOP phosphorylation and degradation was essential for p53 on the transcriptional regulation of Trib3. CONCLUSION Overall, these results indicate that inhibiting the p53-TRIB3 pathway by SFN plays an unsuspected key role in improvement of myocardial IR, which may be a promising strategy for attenuating diabetic cardiomyopathy (DCM) in diabetic patients.
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Affiliation(s)
- Guangping Lu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Yufeng Tang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, China
| | - Ou Chen
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Yuanfang Guo
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Mengjie Xiao
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jie Wang
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Qingbo Liu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jiahao Li
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Ting Gao
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Xiaohui Zhang
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jingjing Zhang
- Department of Cardiology at the First Hospital of China Medical University, and Department of Cardiology at the People's Hospital of Liaoning Province, Shenyang, Liaoning 110016, China
| | - Quanli Cheng
- Department of Cardiovascular Disease, First Hospital of Jilin University, Changchun, Jilin 130021, China.
| | - Rong Kuang
- NMPA Key Laboratory for Animal Alternative Testing Technology of Cosmetics, Zhejiang Institute for Food and Drug Control, Hangzhou, Zhejiang 310004, China.
| | - Junlian Gu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China.
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Doğanyiğit Z, Okan A, Taheri S, Yılmaz Z, Akyüz E, Demir N. Evaluation of linagliptin and insulin combined therapy on unfolded protein response in type 1 diabetic mouse heart. Chem Biol Drug Des 2023; 102:1085-1096. [PMID: 37532256 DOI: 10.1111/cbdd.14308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/07/2023] [Accepted: 07/17/2023] [Indexed: 08/04/2023]
Abstract
The aim of this study is to reveal the effects of the use of linagliptin, a DPP-4 inhibitor due to its beneficial cardiovascular effects, on endoplasmic reticulum stress (ERS) signaling, which is involved in the pathogenesis of cardiovascular complications related to type 1 diabetes. BALB/c female mice (n = 72) were divided into six groups: control, diabetes+insulin, diabetes+linagliptin, diabetes+linagliptin+insulin, diabetes+TUDCA, and diabetes+TUDCA+insulin. Immunohistochemistry and western blot method, qRT-PCR, ELISA method, and malondialdehyde (MDA) measurements were performed. Linagliptin administered to the type 1 diabetic mouse heart significantly reduced the expression levels of the total and cleaved forms of ATF6, ATF4, and p-JNK, caspase 3. Immunohistochemical and western blot analyses revealed that cleaved caspase 3 protein expression was significantly increased in the diabetes+insulin group compared to the other groups. According to ELISA findings, TUDCA was more effective in reducing NOX 1 and MDA levels than linagliptin. While linagliptin decreased the Chop mRNA level, no change was observed in the Grp78 mRNA level. Our findings showed that there was not much difference between the administration of linagliptin alone or in combination with insulin. Our study reveals that linagliptin is an effective therapeutic agent on ERS and apoptotic UPR in type 1 diabetic hearts.
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Affiliation(s)
- Züleyha Doğanyiğit
- Faculty of Medicine, Department of Histology and Embryology, Yozgat Bozok University, Yozgat, Turkey
| | - Aslı Okan
- Faculty of Medicine, Department of Histology and Embryology, Yozgat Bozok University, Yozgat, Turkey
| | - Serpil Taheri
- Faculty of Medicine, Department of Medical Biology, Erciyes University, Kayseri, Turkey
| | - Zeynep Yılmaz
- Faculty of Medicine, Department of Medical Biology, Erciyes University, Kayseri, Turkey
| | - Enes Akyüz
- Faculty of International Medicine, Department of Biophysics, University of Health Sciences, Istanbul, Turkey
| | - Necdet Demir
- Faculty of Medicine, Department of Histology and Embryology, Akdeniz University, Antalya, Turkey
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Men L, Guo J, Cao Y, Huang B, Wang Q, Huo S, Wang M, Peng D, Peng L, Shi W, Li S, Lin L, Lv J. IL-6/gp130/STAT3 signaling contributed to the activation of the PERK arm of the unfolded protein response in response to chronic β-adrenergic stimulation. Free Radic Biol Med 2023; 205:163-174. [PMID: 37307935 DOI: 10.1016/j.freeradbiomed.2023.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 06/09/2023] [Indexed: 06/14/2023]
Abstract
Prolonged activation of the PERK branch of the unfolded protein response (UPR) promotes cardiomyocytes apoptosis in response to chronic β-adrenergic stimulation. STAT3 plays a critical role in β-adrenergic functions in the heart. However, whether STAT3 contributed to β-adrenoceptor-mediated PERK activation and how β-adrenergic signaling activates STAT3 remains unclear. This study aimed to investigate whether STAT3-Y705 phosphorylation contributed to the PERK arm activation in cardiomyocytes and if IL-6/gp130 signaling was involved in the chronic β-AR-stimulation-induced STAT3 and PERK arm activation. We found that the PERK phosphorylation was positively associated with STAT3 activation. Wild-type STAT3 plasmids transfection activated the PERK/eIF2α/ATF4/CHOP pathway in cardiomyocytes while dominant negative Y705F STAT3 plasmids caused no obvious effect on PERK signaling. Stimulation with isoproterenol produced a significant increase in the level of IL-6 in the cardiomyocyte's supernatants, while IL-6 silence inhibited PERK phosphorylation but failed to attenuate STAT3 activation in response to isoproterenol stimulation. Gp130 silence attenuated isoproterenol-induced STAT3 activation and PERK phosphorylation. Inhibiting IL-6/gp130 pathway by bazedoxifene and inhibiting STAT3 by stattic both reversed isoproterenol-induced STAT3-Y705 phosphorylation, ROS production, PERK activation, IRE1α activation, and cardiomyocytes apoptosis in vitro. Bazedoxifene (5 mg/kg/day by oral gavage once a day) exhibited similar effect as carvedilol (10 mg/kg/day by oral gavage once a day) on attenuating chronic isoproterenol (30 mg/kg by abdominal injection once a day, 7 days) induced cardiac systolic dysfunction, cardiac hypertrophy and fibrosis in C57BL/6 mice. Meanwhile, bazedoxifene attenuates isoproterenol-induced STAT3-Y705 phosphorylation, PERK/eIF2α/ATF4/CHOP activation, IRE1α activation, and cardiomyocytes apoptosis to a similar extend as carvedilol in the cardiac tissue of mice. Our results showed that chronic β-adrenoceptor-mediated stimulation activated the STAT3 and PERK arm of the UPR at least partially via IL-6/gp130 pathway. Bazedoxifene has great potential to be used as an alternative to conventional β-blockers to attenuate β-adrenoceptor-mediated maladaptive UPR.
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Affiliation(s)
- Lintong Men
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Junyi Guo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Yu Cao
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bingyu Huang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shengqi Huo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Moran Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dewei Peng
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lulu Peng
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Shi
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Li
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Lin
- Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China.
| | - Jiagao Lv
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Men L, Lin L, Guo J. PERK inhibition in hearts: angel or devil? Trends Mol Med 2023:S1471-4914(23)00094-1. [PMID: 37270346 DOI: 10.1016/j.molmed.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 05/15/2023] [Indexed: 06/05/2023]
Affiliation(s)
- Lintong Men
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Li Lin
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China; Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China.
| | - Junyi Guo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China.
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Hamilton S, Terentyev D. ER stress and calcium-dependent arrhythmias. Front Physiol 2022; 13:1041940. [PMID: 36425292 PMCID: PMC9679650 DOI: 10.3389/fphys.2022.1041940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 10/24/2022] [Indexed: 11/11/2022] Open
Abstract
The sarcoplasmic reticulum (SR) plays the key role in cardiac function as the major source of Ca2+ that activates cardiomyocyte contractile machinery. Disturbances in finely-tuned SR Ca2+ release by SR Ca2+ channel ryanodine receptor (RyR2) and SR Ca2+ reuptake by SR Ca2+-ATPase (SERCa2a) not only impair contraction, but also contribute to cardiac arrhythmia trigger and reentry. Besides being the main Ca2+ storage organelle, SR in cardiomyocytes performs all the functions of endoplasmic reticulum (ER) in other cell types including protein synthesis, folding and degradation. In recent years ER stress has become recognized as an important contributing factor in many cardiac pathologies, including deadly ventricular arrhythmias. This brief review will therefore focus on ER stress mechanisms in the heart and how these changes can lead to pro-arrhythmic defects in SR Ca2+ handling machinery.
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Affiliation(s)
- Shanna Hamilton
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, United States,Dorothy M. Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States,*Correspondence: Shanna Hamilton,
| | - Dmitry Terentyev
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, United States,Dorothy M. Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
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Nakamura S, Numata G, Yamaguchi T, Tokiwa H, Higashikuni Y, Nomura S, Sasano T, Takimoto E, Komuro I. Endoplasmic reticulum stress-activated nuclear factor-kappa B signaling pathway induces the upregulation of cardiomyocyte dopamine D1 receptor in heart failure. Biochem Biophys Res Commun 2022; 637:247-253. [DOI: 10.1016/j.bbrc.2022.11.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022]
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Gasdermin D mediates endoplasmic reticulum stress via FAM134B to regulate cardiomyocyte autophagy and apoptosis in doxorubicin-induced cardiotoxicity. Cell Death Dis 2022; 13:901. [PMID: 36289195 PMCID: PMC9606128 DOI: 10.1038/s41419-022-05333-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 01/23/2023]
Abstract
Cardiomyocyte pyroptosis and apoptosis play a vital role in the pathophysiology of several cardiovascular diseases. Our recent study revealed that gasdermin D (GSDMD) can promote myocardial I/R injury via the caspase-11/GSDMD pathway. We also found that GSDMD deletion attenuated myocardial I/R and MI injury by reducing cardiomyocyte apoptosis and pyroptosis. However, how GSDMD mediates cardiomyocyte apoptosis and protects myocardial function remains unclear. Here, we found that doxorubicin (DOX) treatment resulted in increased apoptosis and pyroptosis in cardiomyocytes and that caspase-11/GSDMD could mediate DOX-induced cardiotoxicity (DIC) injury. Interestingly, GSDMD overexpression promoted cardiomyocyte apoptosis, which was attenuated by GSDMD knockdown. Notably, GSDMD overexpression exacerbated DIC injury, impaired cardiac function in vitro and in vivo, and enhanced DOX-induced cardiomyocyte autophagy. Mechanistically, GSDMD regulated the activity of FAM134B, an endoplasmic reticulum autophagy receptor, by pore formation on the endoplasmic reticulum membrane via its N-terminus, thus activating endoplasmic reticulum stress. In turn, FAM134B interacted with autophagic protein LC3, thus inducing cardiac autophagy, promoting cardiomyocyte apoptosis, and aggravating DIC. These results suggest that GSDMD promotes autophagy and induces cardiomyocyte apoptosis by modulating the reaction of FAM134B and LC3, thereby promoting DIC injury. Targeted regulation of GSDMD may be a new target for the prevention and treatment of DIC.
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Sikorski V, Vento A, Kankuri E. Emerging roles of the RNA modifications N6-methyladenosine and adenosine-to-inosine in cardiovascular diseases. MOLECULAR THERAPY - NUCLEIC ACIDS 2022; 29:426-461. [PMID: 35991314 PMCID: PMC9366019 DOI: 10.1016/j.omtn.2022.07.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Cardiovascular diseases lead the mortality and morbidity disease metrics worldwide. A multitude of chemical base modifications in ribonucleic acids (RNAs) have been linked with key events of cardiovascular diseases and metabolic disorders. Named either RNA epigenetics or epitranscriptomics, the post-transcriptional RNA modifications, their regulatory pathways, components, and downstream effects substantially contribute to the ways our genetic code is interpreted. Here we review the accumulated discoveries to date regarding the roles of the two most common epitranscriptomic modifications, N6-methyl-adenosine (m6A) and adenosine-to-inosine (A-to-I) editing, in cardiovascular disease.
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Affiliation(s)
- Vilbert Sikorski
- Department of Pharmacology, Faculty of Medicine, University of Helsinki, 00014 Helsinki, Finland
| | - Antti Vento
- Heart and Lung Center, Helsinki University Hospital, 00029 Helsinki, Finland
| | - Esko Kankuri
- Department of Pharmacology, Faculty of Medicine, University of Helsinki, 00014 Helsinki, Finland
- Corresponding author Esko Kankuri, M.D. Ph.D., Faculty of Medicine, Department of Pharmacology, PO Box 63 (Haartmaninkatu 8), FIN-00014 University of Helsinki, 00014 Helsinki, Finland.
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Liu M, Kang GJ, Dudley SC. Preventing unfolded protein response-induced ion channel dysregulation to treat arrhythmias. Trends Mol Med 2022; 28:443-451. [DOI: 10.1016/j.molmed.2022.03.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 01/15/2023]
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Tu T, Li B, Li X, Zhang B, Xiao Y, Li J, Qin F, Liu N, Sun C, Liu Q, Zhou S. Dietary ω-3 fatty acids reduced atrial fibrillation vulnerability via attenuating myocardial endoplasmic reticulum stress and inflammation in a canine model of atrial fibrillation. J Cardiol 2022; 79:194-201. [PMID: 34702603 DOI: 10.1016/j.jjcc.2021.08.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 07/08/2021] [Accepted: 08/16/2021] [Indexed: 01/08/2023]
Abstract
BACKGROUND Dietary consumption of ω-3 fatty acids is correlated with a reduced incidence of cardiovascular events. Here, we investigated the effect of dietary ω-3 fatty acids on atrial fibrillation (AF) vulnerability in a canine model of AF and explored the related mechanisms. METHODS Twenty four male beagle dogs (weight, 8-10 kg) were randomly divided into four groups: (a) sham-operated group (normal chow); (b) AF+FO [AF and normal chow supplemented with fish oil (FO): 0.6 g n-3 polyunsaturated fatty acids (ω-3 PUFA) /kg/day]; (c) AF group (normal chow); (d) sham-operated FO group (chow supplemented with FO: 0.6 g ω-3 PUFA/kg/day). AF was induced by rapid atrial pacing (RAP: 400 bpm for 4 weeks). Daily oral administration of FO was initiated 1 week before surgery and continued for 4 weeks post operation. RESULTS Atrial electric remodeling was significantly attenuated and AF vulnerability were significantly reduced in AF+FO group compared to AF group. Endoplasmic reticulum (ER) stress-related protein expression levels of glucose-regulated protein78, C/EBP homologous protein, cleaved-Caspase12, and phosphorylation of protein kinase R-like ER kinase as well as inflammatory cytokines interleukin-1β, interleukin-6, tumor necrosis factor-α in left atrium (LA) were significantly downregulated in AF+FO group than in AF group (all p<0.05). In addition, Masson staining revealed lower extent of LA interstitial fibrosis in AF+FO group than in AF group (p<0.01). Myocardial apoptosis was also significantly reduced in AF+FO group than in AF group (p<0.05). CONCLUSIONS Dietary ω-3 fatty acids could significantly reduce RAP-induced AF vulnerability, possibly via attenuating myocardial ER stress, inflammation, and apoptosis in this canine model of AF.
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Affiliation(s)
- Tao Tu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Biao Li
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China; Shenzhen Traditional Chinese Medicine Hospital, 1 Fuhua Rd, Futian District, Shenzhen, Guangdong Province, China
| | - Xuping Li
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Baojian Zhang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China; Department of Cardiology, the Affiliated Chinese Medicine Hospital of Xinjiang Medical University, Urumqi City, Xinjiang, PR China
| | - Yichao Xiao
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Jiayi Li
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Fen Qin
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Na Liu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Chao Sun
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Qiming Liu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China.
| | - Shenghua Zhou
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China.
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Daimi H, Lozano-Velasco E, Aranega A, Franco D. Genomic and Non-Genomic Regulatory Mechanisms of the Cardiac Sodium Channel in Cardiac Arrhythmias. Int J Mol Sci 2022; 23:1381. [PMID: 35163304 PMCID: PMC8835759 DOI: 10.3390/ijms23031381] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/30/2021] [Accepted: 01/06/2022] [Indexed: 12/19/2022] Open
Abstract
Nav1.5 is the predominant cardiac sodium channel subtype, encoded by the SCN5A gene, which is involved in the initiation and conduction of action potentials throughout the heart. Along its biosynthesis process, Nav1.5 undergoes strict genomic and non-genomic regulatory and quality control steps that allow only newly synthesized channels to reach their final membrane destination and carry out their electrophysiological role. These regulatory pathways are ensured by distinct interacting proteins that accompany the nascent Nav1.5 protein along with different subcellular organelles. Defects on a large number of these pathways have a tremendous impact on Nav1.5 functionality and are thus intimately linked to cardiac arrhythmias. In the present review, we provide current state-of-the-art information on the molecular events that regulate SCN5A/Nav1.5 and the cardiac channelopathies associated with defects in these pathways.
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Affiliation(s)
- Houria Daimi
- Biochemistry and Molecular Biology Laboratory, Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
| | - Estefanía Lozano-Velasco
- Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (A.A.); (D.F.)
- Medina Foundation, Technology Park of Health Sciences, Av. del Conocimiento, 34, 18016 Granada, Spain
| | - Amelia Aranega
- Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (A.A.); (D.F.)
- Medina Foundation, Technology Park of Health Sciences, Av. del Conocimiento, 34, 18016 Granada, Spain
| | - Diego Franco
- Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (A.A.); (D.F.)
- Medina Foundation, Technology Park of Health Sciences, Av. del Conocimiento, 34, 18016 Granada, Spain
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Li X, Yang Y, Liang L, Fan M, Li X, Feng N, Pan Y, Tan Q, Xu Q, Xie Y, Guo F. Effect Of XBP1 Deficiency In Cartilage On The Regulatory Network Of LncRNA/circRNA-miRNA-mRNA. Int J Biol Sci 2022; 18:315-330. [PMID: 34975335 PMCID: PMC8692151 DOI: 10.7150/ijbs.64054] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 10/29/2021] [Indexed: 12/13/2022] Open
Abstract
X-box binding protein 1(XBP1) is a critical component for unfolded protein response (UPR) in ER stress. According to previous studies performed with different XBP1-deficient mice, the XBP1 gene affects mouse cartilage development and causes other related diseases. However, how the complete transcriptome, including mRNA and ncRNAs, affects the function of cartilage and other tissues when XBP1 is deficient in chondrocytes is unclear. In this study, we aimed to screen the differentially expressed (DE) mRNAs, circRNAs, lncRNAs and miRNAs in XBP1 cartilage-specific knockout (CKO) mice using high throughput sequencing and construct the circRNA-miRNA-mRNA and lncRNA-miRNA-mRNA regulatory networks. DE LncRNAs (DE-LncRNAs), circRNAs (DE-circRNAs), miRNAs (DE-miRNAs), and mRNAs [differentially expressed genes (DEGs)] between the cartilage tissue of XBP1 CKO mice and controls were identified, including 441 DE-LncRNAs, 15 DE-circRNAs, 6 DE-miRNAs, and 477 DEGs. Further, 253,235 lncRNA-miRNA-mRNA networks and 1,822 circRNA-miRNA-mRNA networks were constructed based on the correlation between lncRNAs/circRNAs, miRNAs, mRNAs. The whole transcriptome analysis revealed that XBP1 deficiency in cartilage affects the function of cartilage and other different tissues, as well as associated diseases. Overall, our findings may provide potential biomarkers and mechanisms for the diagnosis and treatment of cartilage and other related diseases.
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Affiliation(s)
- Xiaoli Li
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Yuyou Yang
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Li Liang
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Mengtian Fan
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Xingyue Li
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Naibo Feng
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Yiming Pan
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Qiaoyan Tan
- Department of Wound Repair and Rehabilitation Medicine, State Key Laboratory of Trauma, Burns and Combined Injury, Trauma Center, Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - Qingbo Xu
- Cardiovascular Division, King's College London BHF Centre, London, United Kingdom
| | - Yangli Xie
- Department of Wound Repair and Rehabilitation Medicine, State Key Laboratory of Trauma, Burns and Combined Injury, Trauma Center, Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - Fengjin Guo
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
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13
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Jiang N, Zhou A, Imran H, Shi G, Kaseer B, Siu V, Chu AF, Donaldson DM, Kirk MM, Philips BB, Dudley SC. Cardiac Resynchronization and Circulating Markers of Sarcoplasmic Reticulum Calcium Handling and Sudden Death Risk. JACC Clin Electrophysiol 2021; 7:1079-1083. [PMID: 34454876 DOI: 10.1016/j.jacep.2021.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/17/2021] [Accepted: 07/02/2021] [Indexed: 11/19/2022]
Abstract
Cardiac resynchronization therapy (CRT) can improve heart function and decrease arrhythmic events. We tested whether CRT altered circulating markers of calcium handling and sudden death risk. Circulating cardiac sodium channel messenger RNA (mRNA) splicing variants indicate arrhythmic risk, and a reduction in sarco/endoplasmic reticulum calcium adenosine triphosphatase 2a (SERCA2a) is thought to diminish contractility in heart failure. CRT was associated with a decreased proportion of circulating, nonfunctional sodium channels and improved SERCA2a mRNA expression. Patients without CRT did not have improvement in the biomarkers. These changes might explain the lower arrhythmic risk and improved contractility associated with CRT.
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Affiliation(s)
- Ning Jiang
- Lifespan Cardiovascular Institute, Brown University, Providence, Rhode Island, USA
| | - Anyu Zhou
- Department of Medicine, Brown University, Providence, Rhode Island, USA
| | - Hafiz Imran
- Department of Medicine, Brown University, Providence, Rhode Island, USA
| | - Guangbin Shi
- Department of Medicine, Brown University, Providence, Rhode Island, USA
| | - Bahaa Kaseer
- Department of Medicine, Brown University, Providence, Rhode Island, USA
| | - Vincent Siu
- Cardiology Division, University of Toronto, Toronto, Ontario, Canada
| | - Antony F Chu
- Department of Medicine, Brown University, Providence, Rhode Island, USA
| | - David M Donaldson
- Department of Medicine, University of California at Irvine, Irvine, California, USA
| | - Malcolm M Kirk
- Department of Medicine, Brown University, Providence, Rhode Island, USA
| | - Binu B Philips
- Department of Medicine, Mount Auburn Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Samuel C Dudley
- Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.
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14
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Feyen DA, Perea-Gil I, Maas RG, Harakalova M, Gavidia AA, Ataam JA, Wu TH, Vink A, Pei J, Vadgama N, Suurmeijer AJ, te Rijdt WP, Vu M, Amatya PL, Prado M, Zhang Y, Dunkenberger L, Sluijter JP, Sallam K, Asselbergs FW, Mercola M, Karakikes I. Unfolded Protein Response as a Compensatory Mechanism and Potential Therapeutic Target in PLN R14del Cardiomyopathy. Circulation 2021; 144:382-392. [PMID: 33928785 PMCID: PMC8667423 DOI: 10.1161/circulationaha.120.049844] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Phospholamban (PLN) is a critical regulator of calcium cycling and contractility in the heart. The loss of arginine at position 14 in PLN (R14del) is associated with dilated cardiomyopathy with a high prevalence of ventricular arrhythmias. How the R14 deletion causes dilated cardiomyopathy is poorly understood, and there are no disease-specific therapies. METHODS We used single-cell RNA sequencing to uncover PLN R14del disease mechanisms in human induced pluripotent stem cells (hiPSC-CMs). We used both 2-dimensional and 3-dimensional functional contractility assays to evaluate the impact of modulating disease-relevant pathways in PLN R14del hiPSC-CMs. RESULTS Modeling of the PLN R14del cardiomyopathy with isogenic pairs of hiPSC-CMs recapitulated the contractile deficit associated with the disease in vitro. Single-cell RNA sequencing revealed the induction of the unfolded protein response (UPR) pathway in PLN R14del compared with isogenic control hiPSC-CMs. The activation of UPR was also evident in the hearts from PLN R14del patients. Silencing of each of the 3 main UPR signaling branches (IRE1, ATF6, or PERK) by siRNA exacerbated the contractile dysfunction of PLN R14del hiPSC-CMs. We explored the therapeutic potential of activating the UPR with a small molecule activator, BiP (binding immunoglobulin protein) inducer X. PLN R14del hiPSC-CMs treated with BiP protein inducer X showed a dose-dependent amelioration of the contractility deficit in both 2-dimensional cultures and 3-dimensional engineered heart tissues without affecting calcium homeostasis. CONCLUSIONS Together, these findings suggest that the UPR exerts a protective effect in the setting of PLN R14del cardiomyopathy and that modulation of the UPR might be exploited therapeutically.
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Affiliation(s)
- Dries A.M. Feyen
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Isaac Perea-Gil
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Renee G.C. Maas
- Department of Cardiology, Division Heart and Lungs, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Magdalena Harakalova
- Department of Cardiology, Division Heart and Lungs, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Alexandra A. Gavidia
- Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jennifer Arthur Ataam
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ting-Hsuan Wu
- Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Aryan Vink
- Department of Pathology, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Jiayi Pei
- Department of Cardiology, Division Heart and Lungs, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Nirmal Vadgama
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Albert J. Suurmeijer
- Deptment of Pathology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Wouter P. te Rijdt
- Netherlands Heart Institute, Utrecht, The Netherlands,Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Michelle Vu
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Prashila L. Amatya
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Maricela Prado
- Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yuan Zhang
- Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Logan Dunkenberger
- Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Joost P.G. Sluijter
- Department of Cardiology, Division Heart and Lungs, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Karim Sallam
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Folkert W. Asselbergs
- Department of Cardiology, Division Heart and Lungs, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands,Institute of Cardiovascular Science, Faculty of Population Health Sciences, University College London, London, United Kingdom,Health Data Research UK and Institute of Health Informatics, University College London, London, United Kingdom
| | - Mark Mercola
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ioannis Karakikes
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA,Address for Correspondence: Ioannis Karakikes, PhD, Stanford University School of Medicine, Department of Cardiothoracic Surgery, 300 Pasteur Dr, Suite 1347, Stanford, California 94305, USA. Telephone: 650-721-0784,
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15
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Liu M, Liu H, Parthiban P, Kang GJ, Shi G, Feng F, Zhou A, Gu L, Karnopp C, Tolkacheva EG, Dudley SC. Inhibition of the unfolded protein response reduces arrhythmic risk after myocardial infarction. J Clin Invest 2021; 131:e147836. [PMID: 34324437 DOI: 10.1172/jci147836] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 07/28/2021] [Indexed: 11/17/2022] Open
Abstract
Ischemic cardiomyopathy is associated with an increased risk of sudden death, activation of the unfolded protein response (UPR), and reductions in multiple cardiac ion channels. When activated, the protein kinase-like ER kinase (PERK) branch of the UPR reduces protein translation and abundance. We hypothesized that PERK inhibition could prevent ion channel downregulation and reduce arrhythmic risk after myocardial infarct (MI). MI induced by coronary artery ligation resulted in mice exhibited reduced ion channel levels, ventricular tachycardia (VT), and prolonged corrected intervals between the Q and T waves of the ECGs (QTc). Protein levels of major cardiac ion channels were decreased. MI cardiomyocytes showed significantly prolonged action potential duration and decreased maximum upstroke velocity. Cardiac-specific PERK knockout (PERKKO) reduced electrical remodeling in response to MI with shortened QTc intervals, less VT episodes, and higher survival rates (P<0.05 vs. MI). Pharmacological PERK inhibition had similar effects. In conclusion, activated PERK during MI contributed to arrhythmic risk by downregulation of select cardiac ion channels. PERK inhibition prevented these changes and reduced arrhythmic risk. These results suggest that ion channel downregulation during MI is a fundamental arrhythmic mechanism and maintaining ion channel levels is antiarrhythmic.
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Affiliation(s)
- Man Liu
- Lillehei Heart Institute, University of Minnesota, Minneapolis, United States of America
| | - Hong Liu
- Lillehei Heart Institute, University of Minnesota, Minneapolis, United States of America
| | - Preethy Parthiban
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, United States of America
| | - Gyeoung-Jin Kang
- Lillehei Heart Institute, University of Minnesota, Minneapolis, United States of America
| | - Guangbin Shi
- Department of Medicine, Brown University, Providence, United States of America
| | - Feng Feng
- Lillehei Heart Institute, University of Minnesota, Minneapolis, United States of America
| | - Anyu Zhou
- Department of Medicine, Brown University, Providence, United States of America
| | - Lianzhi Gu
- Lillehei Heart Institute, University of Minnesota, Minneapolis, United States of America
| | - Courtney Karnopp
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, United States of America
| | - Elena G Tolkacheva
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, United States of America
| | - Samuel C Dudley
- Lillehei Heart Institute, University of Minnesota, Minneapolis, United States of America
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16
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Unfolded protein response during cardiovascular disorders: a tilt towards pro-survival and cellular homeostasis. Mol Cell Biochem 2021; 476:4061-4080. [PMID: 34259975 DOI: 10.1007/s11010-021-04223-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/08/2021] [Indexed: 12/13/2022]
Abstract
The endoplasmic reticulum (ER) is an organelle that orchestrates the production and proper assembly of an extensive types of secretory and membrane proteins. Endoplasmic reticulum stress is conventionally related to prolonged disruption in the protein folding machinery resulting in the accumulation of unfolded proteins in the ER. This disruption is often manifested due to oxidative stress, Ca2+ leakage, iron imbalance, disease conditions which in turn hampers the cellular homeostasis and induces cellular apoptosis. A mild ER stress is often reverted back to normal. However, cells retaliate to acute ER stress by activating the unfolded protein response (UPR) which comprises three signaling pathways, Activating transcription factor 6 (ATF6), inositol requiring enzyme 1 alpha (IRE1α), and protein kinase RNA-activated-like ER kinase (PERK). The UPR response participates in both protective and pro-apoptotic responses and not much is known about the mechanistic aspects of the switch from pro-survival to pro-apoptosis. When ER stress outpaces UPR response then cell apoptosis prevails which often leads to the development of various diseases including cardiomyopathies. Therefore, it is important to identify molecules that modulate the UPR that may serve as promising tools towards effective treatment of cardiovascular diseases. In this review, we elucidated the latest advances in construing the contribution imparted by the three arms of UPR to combat the adverse environment in the ER to restore cellular homeostasis during cardiomyopathies. We also summarized the various therapeutic agents that plays crucial role in tilting the UPR response towards pro-survival.
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17
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He J, Gong M, Wang Z, Liu D, Xie B, Luo C, Li G, Tse G, Liu T. Cardiac abnormalities after induction of endoplasmic reticulum stress are associated with mitochondrial dysfunction and connexin43 expression. Clin Exp Pharmacol Physiol 2021; 48:1371-1381. [PMID: 34133785 DOI: 10.1111/1440-1681.13541] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 05/30/2021] [Accepted: 06/09/2021] [Indexed: 02/06/2023]
Abstract
The endoplasmic reticulum (ER) is responsible for protein synthesis and calcium storage. ER stress, reflected by protein unfolding and calcium handling abnormalities, has been studied as a pathogenic factor in cardiovascular diseases. The aim of this study is to examine the effects of ER stress on mechanical and electrophysiological functions in the heart and explore the underlying molecular mechanisms. A total of 30 rats were randomly divided into control, ER stress inducer (tunicamycin[TN]) and ER stress inhibitor (tunicamycin+4-phenylbutyric acid [4-PBA]) groups. ER stress induction led to significantly systolic and diastolic dysfunction as reflected by maximal increasing/decreasing rate of left intraventricular pressure (±dp/dt), left ventricular peaksystolic pressure(LVSP) and LV end-diastolic pressure(LVEDP). Epicardial mapping performed in vivo revealed reduced conduction velocity and increased conduction heterogeneity associated with the development of spontaneous ventricular tachycardia. Masson's trichrome staining revealed marked fibrosis in the myocardial interstitial and sub-pericardial regions, and thickened epicardium. Western blot analysis revealed increased pro-fibrotic factor transforming growth factor-β1 (TGF-β1), decreased mitochondrial biogenesis protein peroxlsome proliferator-activated receptor-γ coactlvator-1α (PGC-1a), and decreased mitochondrial fusion protein mitofusin-2 (MFN2). These changes were associated with mitochondria dysfunction and connexin 43(CX43)translocation to mitochondria. These abnormalities can be partially prevented by the ER stress inhibitor 4-PBA. Our study shows that ER stress induction can produce cardiac electrical and mechanism dysfunction as well as structural remodelling. Mitochondrial function alterations are contributed by CX43 transposition to mitochondria. These abnormalities can be partially prevented by the ER stress inhibitor 4-PBA.
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Affiliation(s)
- Jinli He
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Mengqi Gong
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China.,Department of Cardiology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zaojia Wang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Daiqi Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Bingxin Xie
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Cunjin Luo
- School of Computer Science and Electronic Engineering, University of Essex, Colchester, UK
| | - Guangping Li
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Gary Tse
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK.,Kent and Medway Medical School, Canterbury, UK
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
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18
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Zheng Y, Wan X, Yang D, Ramirez-Navarro A, Liu H, Fu JD, Deschênes I. A Heart Failure-Associated SCN5A Splice Variant Leads to a Reduction in Sodium Current Through Coupled-Gating With the Wild-Type Channel. Front Physiol 2021; 12:661429. [PMID: 33828490 PMCID: PMC8019726 DOI: 10.3389/fphys.2021.661429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 03/01/2021] [Indexed: 12/14/2022] Open
Abstract
Nav1.5, encoded by the gene SCN5A, is the predominant voltage-gated sodium channel expressed in the heart. It initiates the cardiac action potential and thus is crucial for normal heart rhythm and function. Dysfunctions in Nav1.5 have been involved in multiple congenital or acquired cardiac pathological conditions such as Brugada syndrome (BrS), Long QT Syndrome Type 3, and heart failure (HF), all of which can lead to sudden cardiac death (SCD) - one of the leading causes of death worldwide. Our lab has previously reported that Nav1.5 forms dimer channels with coupled gating. We also found that Nav1.5 BrS mutants can exert a dominant-negative (DN) effect and impair the function of wildtype (WT) channels through coupled-gating with the WT. It was previously reported that reduction in cardiac sodium currents (INa), observed in HF, could be due to the increased expression of an SCN5A splice variant - E28D, which results in a truncated sodium channel (Nav1.5-G1642X). In this study, we hypothesized that this SCN5A splice variant leads to INa reduction in HF through biophysical coupling with the WT. We showed that Nav1.5-G1642X is a non-functional channel but can interact with the WT, resulting in a DN effect on the WT channel. We found that both WT and the truncated channel Nav1.5-G1642X traffic at the cell surface, suggesting biophysical coupling. Indeed, we found that the DN effect can be abolished by difopein, an inhibitor of the biophysical coupling. Interestingly, the sodium channel polymorphism H558R, which has beneficial effect in HF patients, could also block the DN effect. In summary, the HF-associated splice variant Nav1.5-G1642X suppresses sodium currents in heart failure patients through a mechanism involving coupled-gating with the wildtype sodium channel.
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Affiliation(s)
- Yang Zheng
- Department of Physiology and Cell Biology, Frick Center for Heart Failure and Arrhythmias, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United States
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
| | - Xiaoping Wan
- Department of Physiology and Cell Biology, Frick Center for Heart Failure and Arrhythmias, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United States
| | - Dandan Yang
- Department of Physiology and Cell Biology, Frick Center for Heart Failure and Arrhythmias, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United States
| | - Angelina Ramirez-Navarro
- Department of Physiology and Cell Biology, Frick Center for Heart Failure and Arrhythmias, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United States
| | - Haiyan Liu
- Department of Physiology and Cell Biology, Frick Center for Heart Failure and Arrhythmias, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United States
| | - Ji-Dong Fu
- Department of Physiology and Cell Biology, Frick Center for Heart Failure and Arrhythmias, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United States
| | - Isabelle Deschênes
- Department of Physiology and Cell Biology, Frick Center for Heart Failure and Arrhythmias, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United States
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19
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Dong C, Wang Y, Ma A, Wang T. Life Cycle of the Cardiac Voltage-Gated Sodium Channel Na V1.5. Front Physiol 2020; 11:609733. [PMID: 33391024 PMCID: PMC7773603 DOI: 10.3389/fphys.2020.609733] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 11/12/2020] [Indexed: 12/13/2022] Open
Abstract
Cardiac voltage-gated sodium channel NaV1.5, encoded by SCN5A, is crucial for the upstroke of action potential and excitation of cardiomyocytes. NaV1.5 undergoes complex processes before it reaches the target membrane microdomains and performs normal functions. A variety of protein partners are needed to achieve the balance between SCN5A transcription and mRNA decay, endoplasmic reticulum retention and export, Golgi apparatus retention and export, selective anchoring and degradation, activation, and inactivation of sodium currents. Subtle alterations can impair NaV1.5 in terms of expression or function, eventually leading to NaV1.5-associated diseases such as lethal arrhythmias and cardiomyopathy.
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Affiliation(s)
- Caijuan Dong
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Ya Wang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Aiqun Ma
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory of Molecular Cardiology, Shaanxi Province, Xi'an, China.,Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, China
| | - Tingzhong Wang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory of Molecular Cardiology, Shaanxi Province, Xi'an, China.,Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, China
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20
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Kubra KT, Akhter MS, Uddin MA, Barabutis N. Unfolded protein response in cardiovascular disease. Cell Signal 2020; 73:109699. [PMID: 32592779 DOI: 10.1016/j.cellsig.2020.109699] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 06/20/2020] [Accepted: 06/21/2020] [Indexed: 12/21/2022]
Abstract
The unfolded protein response (UPR) is a highly conserved molecular machinery, which protects the cells against a diverse variety of stimuli. Activation of this element has been associated with both human health and disease. The purpose of the current manuscript is to provide the most updated information on the involvement of UPR towards the improvement; or deterioration of cardiovascular functions. Since UPR is consisted of three distinct elements, namely the activating transcription factor 6, the protein kinase RNA-like endoplasmic reticulum kinase; and the inositol-requiring enzyme-1α, a highly orchestrated manipulation of those molecular branches may provide new therapeutic possibilities against the severe outcomes of cardiovascular disease.
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Affiliation(s)
- Khadeja-Tul Kubra
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, LA 71201, USA
| | - Mohammad S Akhter
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, LA 71201, USA
| | - Mohammad A Uddin
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, LA 71201, USA
| | - Nektarios Barabutis
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, LA 71201, USA.
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21
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Zhang H, Brown RD, Stenmark KR, Hu CJ. RNA-Binding Proteins in Pulmonary Hypertension. Int J Mol Sci 2020; 21:ijms21113757. [PMID: 32466553 PMCID: PMC7312837 DOI: 10.3390/ijms21113757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 12/21/2022] Open
Abstract
Pulmonary hypertension (PH) is a life-threatening disease characterized by significant vascular remodeling and aberrant expression of genes involved in inflammation, apoptosis resistance, proliferation, and metabolism. Effective therapeutic strategies are limited, as mechanisms underlying PH pathophysiology, especially abnormal expression of genes, remain unclear. Most PH studies on gene expression have focused on gene transcription. However, post-transcriptional alterations have been shown to play a critical role in inflammation and metabolic changes in diseases such as cancer and systemic cardiovascular diseases. In these diseases, RNA-binding proteins (RBPs) have been recognized as important regulators of aberrant gene expression via post-transcriptional regulation; however, their role in PH is less clear. Identifying RBPs in PH is of great importance to better understand PH pathophysiology and to identify new targets for PH treatment. In this manuscript, we review the current knowledge on the role of dysregulated RBPs in abnormal mRNA gene expression as well as aberrant non-coding RNA processing and expression (e.g., miRNAs) in PH.
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Affiliation(s)
- Hui Zhang
- Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (H.Z.); (R.D.B.); (K.R.S.)
| | - R. Dale Brown
- Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (H.Z.); (R.D.B.); (K.R.S.)
| | - Kurt R. Stenmark
- Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (H.Z.); (R.D.B.); (K.R.S.)
| | - Cheng-Jun Hu
- Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (H.Z.); (R.D.B.); (K.R.S.)
- Department of Craniofacial Biology School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
- Correspondence: ; Tel.: +1-303-724-4576; Fax: +1-303-724-4580
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22
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Martewicz S, Magnussen M, Elvassore N. Beyond Family: Modeling Non-hereditary Heart Diseases With Human Pluripotent Stem Cell-Derived Cardiomyocytes. Front Physiol 2020; 11:384. [PMID: 32390874 PMCID: PMC7188911 DOI: 10.3389/fphys.2020.00384] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 03/30/2020] [Indexed: 12/23/2022] Open
Abstract
Non-genetic cardiac pathologies develop as an aftermath of extracellular stress-conditions. Nevertheless, the response to pathological stimuli depends deeply on intracellular factors such as physiological state and complex genetic backgrounds. Without a thorough characterization of their in vitro phenotype, modeling of maladaptive hypertrophy, ischemia and reperfusion injury or diabetes in human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) has been more challenging than hereditary diseases with defined molecular causes. In past years, greater insights into hPSC-CM in vitro physiology and advancements in technological solutions and culture protocols have generated cell types displaying stress-responsive phenotypes reminiscent of in vivo pathological events, unlocking their application as a reductionist model of human cardiomyocytes, if not the adult human myocardium. Here, we provide an overview of the available literature of pathology models for cardiac non-genetic conditions employing healthy (or asymptomatic) hPSC-CMs. In terms of numbers of published articles, these models are significantly lagging behind monogenic diseases, which misrepresents the incidence of heart disease causes in the human population.
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Affiliation(s)
- Sebastian Martewicz
- Shanghai Institute for Advanced Immunochemical Studies (SIAIS), ShanghaiTech University, Shanghai, China
| | - Michael Magnussen
- Stem Cells & Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Nicola Elvassore
- Shanghai Institute for Advanced Immunochemical Studies (SIAIS), ShanghaiTech University, Shanghai, China.,Stem Cells & Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.,Venetian Institute of Molecular Medicine, Padua, Italy.,Department of Industrial Engineering, University of Padova, Padua, Italy
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Banerjee D, Grammatopoulos TN, Palmisciano A, Klinger JR, Krishnan I, Whittenhall M, Zhou A, Dudley S, Ventetuolo CE. Alternative Splicing of the Cardiac Sodium Channel in Pulmonary Arterial Hypertension. Chest 2020; 158:735-738. [PMID: 32112775 DOI: 10.1016/j.chest.2019.12.052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/04/2019] [Accepted: 12/14/2019] [Indexed: 01/03/2023] Open
Affiliation(s)
| | | | | | | | | | | | - Anyu Zhou
- Lillehei Heart Institute, University of Minnesota, Minneapolis, MN
| | - Samuel Dudley
- Lillehei Heart Institute, University of Minnesota, Minneapolis, MN
| | - Corey E Ventetuolo
- Department of Medicine, Brown University, Providence, RI; Department of Health Services, Policy, and Practice, Brown University, Providence, RI.
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24
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The role of MicroRNAs on endoplasmic reticulum stress in myocardial ischemia and cardiac hypertrophy. Pharmacol Res 2019; 150:104516. [DOI: 10.1016/j.phrs.2019.104516] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/12/2019] [Accepted: 10/29/2019] [Indexed: 12/22/2022]
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25
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Yan B, Wang H, Tan Y, Fu W. microRNAs in Cardiovascular Disease: Small Molecules but Big Roles. Curr Top Med Chem 2019; 19:1918-1947. [PMID: 31393249 DOI: 10.2174/1568026619666190808160241] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 06/01/2019] [Accepted: 07/25/2019] [Indexed: 01/01/2023]
Abstract
microRNAs (miRNAs) are an evolutionarily conserved class of small single-stranded noncoding RNAs. The aberrant expression of specific miRNAs has been implicated in the development and progression of diverse cardiovascular diseases. For many decades, miRNA therapeutics has flourished, taking advantage of the fact that miRNAs can modulate gene expression and control cellular phenotypes at the posttranscriptional level. Genetic replacement or knockdown of target miRNAs by chemical molecules, referred to as miRNA mimics or inhibitors, has been used to reverse their abnormal expression as well as their adverse biological effects in vitro and in vivo in an effort to fully implement the therapeutic potential of miRNA-targeting treatment. However, the limitations of the chemical structure and delivery systems are hindering progress towards clinical translation. Here, we focus on the regulatory mechanisms and therapeutic trials of several representative miRNAs in the context of specific cardiovascular diseases; from this basic perspective, we evaluate chemical modifications and delivery vectors of miRNA-based chemical molecules and consider the underlying challenges of miRNA therapeutics as well as the clinical perspectives on their applications.
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Affiliation(s)
- Bingqian Yan
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Huijing Wang
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Yao Tan
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Wei Fu
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.,Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.,Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
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Predictors of cardiac arrhythmic events in non coronary artery disease patients. BMC Cardiovasc Disord 2019; 19:104. [PMID: 31046686 PMCID: PMC6498690 DOI: 10.1186/s12872-019-1083-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 04/16/2019] [Indexed: 11/29/2022] Open
Abstract
Arrhythmic sudden cardiac death (SCD) represents a major worldwide public health problem accounting for 15–20% of deaths. Risk stratification to identify patients at risk of SCD is crucial in order to implement preventive measures in the general population. Several biomarkers have been tested exploring different pathophysiological mechanisms of cardiac conditions. Conflicting results have been described limiting so far their use in clinical practice. The use of new biomarkers such as microRNAs and sex hormones and the emerging role of genetic on risk prediction of SCD is a current research topic showing promising results. This review outlines the role of plasma biomarkers to predict ventricular arrhythmias and SCD in non coronary artery disease with a special focus on their relationship with the genetic biomarkers.
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27
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Zhang G, Wang X, Gillette TG, Deng Y, Wang ZV. Unfolded Protein Response as a Therapeutic Target in Cardiovascular Disease. Curr Top Med Chem 2019; 19:1902-1917. [PMID: 31109279 PMCID: PMC7024549 DOI: 10.2174/1568026619666190521093049] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 04/09/2019] [Accepted: 05/02/2019] [Indexed: 12/15/2022]
Abstract
Cardiovascular disease is the leading cause of death worldwide. Despite overwhelming socioeconomic impact and mounting clinical needs, our understanding of the underlying pathophysiology remains incomplete. Multiple forms of cardiovascular disease involve an acute or chronic disturbance in cardiac myocytes, which may lead to potent activation of the Unfolded Protein Response (UPR), a cellular adaptive reaction to accommodate protein-folding stress. Accumulation of unfolded or misfolded proteins in the Endoplasmic Reticulum (ER) elicits three signaling branches of the UPR, which otherwise remain quiescent. This ER stress response then transiently suppresses global protein translation, augments production of protein-folding chaperones, and enhances ER-associated protein degradation, with an aim to restore cellular homeostasis. Ample evidence has established that the UPR is strongly induced in heart disease. Recently, the mechanisms of action and multiple pharmacological means to favorably modulate the UPR are emerging to curb the initiation and progression of cardiovascular disease. Here, we review the current understanding of the UPR in cardiovascular disease and discuss existing therapeutic explorations and future directions.
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Affiliation(s)
- Guangyu Zhang
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Xiaoding Wang
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Thomas G. Gillette
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Yingfeng Deng
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Zhao V. Wang
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
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Santa-Helena E, da Costa Cabrera D, Teixeira S, Rodrigues J, Castro M, Montes D'Oca MG, Maia Nery LE, Neves Gonçalves CA. New fatty dihydropyridines present cardioprotective potential in H9c2 cardioblasts submitted to simulated ischemia and reperfusion. Biomed Pharmacother 2018; 109:1532-1540. [PMID: 30551405 DOI: 10.1016/j.biopha.2018.11.009] [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] [Received: 09/27/2018] [Revised: 11/01/2018] [Accepted: 11/02/2018] [Indexed: 10/27/2022] Open
Abstract
Nifedipine is a calcium channel blocker dihydropyridine that has been used in the treatment of hypertension. The production of reactive species and calcium overload are the main contributors to myocardial ischemia-reperfusion (I / R) injury. We investigated the ability of novel dihydropyridines (DHPs) to improve the effect of protecting against the injury induced by ischemia and reperfusion in cardioblasts when compared to nifedipine. Forty three DHPs were created varying the fatty chains derived from palmitic acid, stearic acid and oleic acids and aromatic moiety in addition to the addition of chemical elements such as chlorine, nitrogen dioxide, furfural, hydroxyl and methoxy. Cytotoxicity and inhibition of linoleic oxidation were evaluated for all new DHPs and also for nifedipine. The alpha-tocopherol and butylated hydroxytoluene (BHT) were used as antioxidants controls. The compounds with the best antioxidant potential were used in the ischemia and reperfusion (I / R) induction test in cardioblasts (H9c2). Cardioblasts were treated 24 h after assembly of plates and submitted to the ischemia simulation (30 min), after which, normoxia and cellular nutrition conditions were reestablished, simulating reperfusion (additional 30 min). Right after, cell viability, apoptosis, necrosis, and the generation of reactive oxygen species (ROS) were evaluated. Cell viability during I / R was not altered in cells treated with nifedipine, BHT and the new DHP composed of palmitic acid with hydroxyl group in the aromatic substituent. The other new DHPs increased cell viability during I / R simulation and reduced levels of reactive species compared to the I / R group, demonstrating the antioxidant capacity of the new DHPs. Therefore, DHPS with palmitic and oleic acids in the C3 and C5 position with NO2 or Cl in aromatic moiety, presented the highest antioxidant potential (linoleic oxidant test). The new DHPs increased cell viability during I / R simulation and reduced levels of reactive species compared to the ischemia and reperfusion group, demonstrating the antioxidant capacity of the new DHPs. Taken together, these results indicate that those new DHPs have a greater cardioprotective antioxidant capacity to face the damages of ischemia and reperfusion.
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Affiliation(s)
- Eduarda Santa-Helena
- Programa de Pós-graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil.
| | - Diego da Costa Cabrera
- Laboratório Kolbe de Síntese Orgânica, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil.
| | - Stefanie Teixeira
- Programa de Pós-graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil.
| | - Jonathan Rodrigues
- Programa de Pós-graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil.
| | - Micheli Castro
- Programa de Pós-graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil.
| | - Marcelo G Montes D'Oca
- Laboratório Kolbe de Síntese Orgânica, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil.
| | - Luiz Eduardo Maia Nery
- Programa de Pós-graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil.
| | - Carla Amorim Neves Gonçalves
- Programa de Pós-graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil.
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Michalak M, Agellon LB. Stress Coping Strategies in the Heart: An Integrated View. Front Cardiovasc Med 2018; 5:168. [PMID: 30519562 PMCID: PMC6258784 DOI: 10.3389/fcvm.2018.00168] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 11/02/2018] [Indexed: 12/15/2022] Open
Abstract
The heart is made up of an ordered amalgam of cardiac cell types that work together to coordinate four major processes, namely energy production, electrical conductance, mechanical work, and tissue remodeling. Over the last decade, a large body of information has been amassed regarding how different cardiac cell types respond to cellular stress that affect the functionality of their elaborate intracellular membrane networks, the cellular reticular network. In the context of the heart, the manifestations of stress coping strategies likely differ depending on the coping strategy outcomes of the different cardiac cell types, and thus may underlie the development of distinct cardiac disorders. It is not clear whether all cardiac cell types have similar sensitivity to cellular stress, how specific coping response strategies modify their unique roles, and how their metabolic status is communicated to other cells within the heart. Here we discuss our understanding of the roles of specialized cardiac cells that together make the heart function as an organ with the ability to pump blood continuously and follow a regular rhythm.
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Affiliation(s)
- Marek Michalak
- Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - Luis B Agellon
- School of Human Nutrition, McGill University, Ste. Anne de Bellevue, QC, Canada
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Abstract
Human heart failure is characterized by arrhythmogenic electrical remodeling consisting mostly of ion channel downregulations. Reversing these downregulations is a logical approach to antiarrhythmic therapy, but understanding the pathophysiological mechanisms of the reduced currents is crucial for finding the proper treatments. The unfolded protein response (UPR) is activated by endoplasmic reticulum (ER) stress and has been found to play pivotal roles in different diseases including neurodegenerative diseases, diabetes mellitus, and heart disease. Recently, the UPR is reported to regulate multiple cardiac ion channels, contributing to arrhythmias in heart disease. In this review, we will discuss which UPR modulators and effectors could be involved in regulation of cardiac ion channels in heart disease, and how the understanding of these regulating mechanisms may lead to new antiarrhythmic therapeutics that lack the proarrhythmic risk of current ion channel blocking therapies.
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Affiliation(s)
- Man Liu
- a Division of Cardiology, Department of Medicine, The Lillehei Heart Institute , University of Minnesota at Twin Cities , Minneapolis , USA
| | - Samuel C Dudley
- a Division of Cardiology, Department of Medicine, The Lillehei Heart Institute , University of Minnesota at Twin Cities , Minneapolis , USA
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Li Z, Meng Z, Lu J, Chen FM, Wong WT, Tse G, Zheng C, Keung W, Tse K, Li RA, Jiang L, Yao X. TRPV6 protects ER stress-induced apoptosis via ATF6α-TRPV6-JNK pathway in human embryonic stem cell-derived cardiomyocytes. J Mol Cell Cardiol 2018; 120:1-11. [DOI: 10.1016/j.yjmcc.2018.05.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 04/27/2018] [Accepted: 05/10/2018] [Indexed: 02/06/2023]
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32
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Burgeiro A, Fonseca A, Espinoza D, Carvalho L, Lourenço N, Antunes M, Carvalho E. Proteostasis in epicardial versus subcutaneous adipose tissue in heart failure subjects with and without diabetes. Biochim Biophys Acta Mol Basis Dis 2018; 1864:2183-2198. [PMID: 29625179 PMCID: PMC6375688 DOI: 10.1016/j.bbadis.2018.03.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/14/2018] [Accepted: 03/29/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND Cardiovascular diseases (CVDs) are leading cause of death and primary cause of morbidity and mortality in diabetic population. Epicardial adipose tissue (EAT) covers the heart's surface and is a source of biomolecules regulating heart and blood vessel physiology. The protective activation of the unfolded protein response (UPR) and autophagy allows the cardiomyocyte reticular network to restore energy and/or nutrient homeostasis and to avoid cell death. However, an excessive or prolonged UPR activation can trigger cell death. UPR activation is an early event of diabetic cardiomyopathies and deregulated autophagy is associated with CVDs. RESULTS An upregulation of UPR markers (glucose-regulated protein 78 KDa, glucose-regulated protein 94 KDa, inositol-requiring enzyme 1α, protein kinase RNA-like ER kinase and CCAAT/-enhancer-binding protein homologous protein (CHOP) gene) in EAT compared to subcutaneous adipose tissue (SAT), was observed as well as the UPR-related apoptosis marker caspase-4/procaspase-4 ratio but not in CHOP protein levels. Additionally, levels of ubiquitin and ubiquitinated proteins were decreased in EAT. Moreover, upregulation of autophagy markers (5' adenosine monophosphate-activated protein kinase, mechanistic target of rapamycin, Beclin 1, microtubule-associated protein light chain 3-II, lysosome-associated membrane protein 2, and PTEN-induced putative kinase 1) was observed, as well as an increase in the apoptotic Bim but not the ratio between Bim and the anti-apoptotic Bcl-2 in EAT. Diabetic patients show alterations in UPR activation markers but not in autophagy or apoptosis markers. CONCLUSION UPR and autophagy are increased in EAT compared to SAT, opening doors to the identification of early biomarkers for cardiomyopathies and novel therapeutic targets.
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Affiliation(s)
- A. Burgeiro
- Center of Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal
| | - A.C. Fonseca
- Center of Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal
| | - D. Espinoza
- Center of Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal
| | - L. Carvalho
- Institute of Pathology, Faculty of Medicine, University of Coimbra, 3004-517 Coimbra, Portugal
| | - N. Lourenço
- Centre for Informatics and Systems of the University of Coimbra (CISUC), Department of Informatics Engineering, University of Coimbra, Portugal
| | - M. Antunes
- Cardiothoracic Surgery Unit at the Coimbra University Hospital Centre, Praceta Prof. Mota Pinto, 3000-075 Coimbra, Portugal
| | - E. Carvalho
- Center of Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal,The Portuguese Diabetes Association (APDP), 1250-203 Lisbon, Portugal,Arkansas Children's Research Institute, Little Rock, Arkansas 72202, United States,Corresponding author: Eugénia Carvalho, , Address for correspondence: Centro de Neurociências e Biologia Celular, Universidade de Coimbra, Rua Larga, Faculdade de Medicina, Pólo I, 1° andar,3004-504 Coimbra, Phone number: 00351 239820190, Fax number: 00351 239822776
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Wang S, Binder P, Fang Q, Wang Z, Xiao W, Liu W, Wang X. Endoplasmic reticulum stress in the heart: insights into mechanisms and drug targets. Br J Pharmacol 2018; 175:1293-1304. [PMID: 28548229 PMCID: PMC5867005 DOI: 10.1111/bph.13888] [Citation(s) in RCA: 134] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 05/04/2017] [Accepted: 05/16/2017] [Indexed: 01/03/2023] Open
Abstract
The endoplasmic reticulum (ER) serves several essential cellular functions including protein synthesis, protein folding, protein translocation, calcium homoeostasis and lipid biosynthesis. Physiological or pathological stimuli, which disrupt ER homoeostasis and disturb its functions, lead to an accumulation of misfolded and unfolded proteins, a condition referred to as ER stress. ER stress triggers the unfolded protein response to restore the homoeostasis of ER, through activating transcriptional and translational pathways. However, prolonged ER stress will lead to cell dysfunction and apoptosis. Recent evidence revealed that ER stress is involved in the development and progression of various heart diseases, such as cardiac hypertrophy, ischaemic heart diseases and heart failure. Therefore, improved understanding of the molecular mechanisms of ER stress in heart disease will help to investigate more potential targets for new therapeutic interventions and drug discovery. LINKED ARTICLES This article is part of a themed section on Spotlight on Small Molecules in Cardiovascular Diseases. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.8/issuetoc.
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Affiliation(s)
- Shunyao Wang
- Faculty of Biology, Medicine and HealthThe University of ManchesterManchesterUK
| | - Pablo Binder
- Faculty of Biology, Medicine and HealthThe University of ManchesterManchesterUK
| | - Qiru Fang
- State Key Laboratory of New‐tech for Chinese Medicine Pharmaceutical ProcessLianyungangChina
| | - Zhenzhong Wang
- State Key Laboratory of New‐tech for Chinese Medicine Pharmaceutical ProcessLianyungangChina
| | - Wei Xiao
- State Key Laboratory of New‐tech for Chinese Medicine Pharmaceutical ProcessLianyungangChina
| | - Wei Liu
- Faculty of Biology, Medicine and HealthThe University of ManchesterManchesterUK
| | - Xin Wang
- Faculty of Biology, Medicine and HealthThe University of ManchesterManchesterUK
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Liu M, Shi G, Zhou A, Rupert CE, Coulombe KLK, Dudley SC. Activation of the unfolded protein response downregulates cardiac ion channels in human induced pluripotent stem cell-derived cardiomyocytes. J Mol Cell Cardiol 2018; 117:62-71. [PMID: 29474817 DOI: 10.1016/j.yjmcc.2018.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 02/03/2018] [Accepted: 02/14/2018] [Indexed: 10/18/2022]
Abstract
RATIONALE Heart failure is characterized by electrical remodeling that contributes to arrhythmic risk. The unfolded protein response (UPR) is active in heart failure and can decrease protein levels by increasing mRNA decay, accelerating protein degradation, and inhibiting protein translation. OBJECTIVE Therefore, we investigated whether the UPR downregulated cardiac ion channels that may contribute to arrhythmogenic electrical remodeling. METHODS Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) were used to study cardiac ion channels. Action potentials (APs) and ion channel currents were measured by patch clamp recording. The mRNA and protein levels of channels and the UPR effectors were determined by quantitative RT-PCR and Western blotting. Tunicamycin (TM, 50 ng/mL and 5 μg/mL), GSK2606414 (GSK, 300 nmol/L), and 4μ8C (5 μmol/L) were utilized to activate the UPR, inhibit protein kinase-like ER kinase (PERK) and inositol-requiring protein-1 (IRE1), respectively. RESULTS TM-induced activation of the UPR caused significant prolongation of the AP duration (APD) and a reduction of the maximum upstroke velocity (dV/dtmax) of the AP phase 0 in both acute (20-24 h) and chronic treatment (6 days). These changes were explained by reductions in the sodium, L-type calcium, the transient outward and rapidly/slowly activating delayed rectifier potassium currents. Nav1.5, Cav1.2, Kv4.3, and KvLQT1 channels showed concomitant reductions in mRNA and protein levels under activated UPR. Inhibition of PERK or IRE1 shortened the APD and reinstated dV/dtmax. The PERK branch regulated Nav1.5, Kv4.3, hERG, and KvLQT1. The IRE1 branch regulated Nav1.5, hERG, KvLQT1, and Cav1.2. CONCLUSIONS Activated UPR downregulates all major cardiac ion currents and results in electrical remodeling in hiPSC-CMs. Both PERK and IRE1 branches downregulate Nav1.5, hERG, and KvLQT1. The PERK branch specifically downregulates Kv4.3, while the IRE1 branch downregulates Cav1.2. Therefore, the UPR contributed to electrical remodeling, and targeting the UPR might be anti-arrhythmic.
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Affiliation(s)
- Man Liu
- Division of Cardiology, Dept. of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, United States
| | - Guangbin Shi
- Division of Cardiology, Dept. of Medicine, The Warren Alpert School of Medicine, Brown University; Lifespan Cardiovascular Research Center, Providence, RI, United States
| | - Anyu Zhou
- Division of Cardiology, Dept. of Medicine, The Warren Alpert School of Medicine, Brown University; Lifespan Cardiovascular Research Center, Providence, RI, United States
| | - Cassady E Rupert
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, RI, United States
| | - Kareen L K Coulombe
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, RI, United States
| | - Samuel C Dudley
- Division of Cardiology, Dept. of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, United States.
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Gouveia M, Xia K, Colón W, Vieira SI, Ribeiro F. Protein aggregation, cardiovascular diseases, and exercise training: Where do we stand? Ageing Res Rev 2017; 40:1-10. [PMID: 28757291 DOI: 10.1016/j.arr.2017.07.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Revised: 07/11/2017] [Accepted: 07/24/2017] [Indexed: 12/11/2022]
Abstract
Cells ensure their protein quality control through the proteostasis network. Aging and age-related diseases, such as neurodegenerative and cardiovascular diseases, have been associated to the reduction of proteostasis network efficiency and, consequently, to the accumulation of protein misfolded aggregates. The decline in protein homeostasis has been associated with the development and progression of atherosclerotic cardiovascular disease, cardiac hypertrophy, cardiomyopathies, and heart failure. Exercise training is a key component of the management of patients with cardiovascular disease, consistently improving quality of life and prognosis. In this review, we give an overview on age-related protein aggregation, the role of the increase of misfolded protein aggregates on cardiovascular pathophysiology, and describe the beneficial or deleterious effects of the proteostasis network on the development of cardiovascular disease. We subsequently discuss how exercise training, a key lifestyle intervention in those with cardiovascular disease, could restore proteostasis and improve disease status.
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Abnormal sodium channel mRNA splicing in hypertrophic cardiomyopathy. Int J Cardiol 2017; 249:282-286. [PMID: 28916354 DOI: 10.1016/j.ijcard.2017.08.071] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 08/03/2017] [Accepted: 08/29/2017] [Indexed: 01/21/2023]
Abstract
BACKGROUND Our previous studies showed that in ischemic and nonischemic heart failure (HF), the voltage-gated cardiac Na+ channel α subunit (SCN5A) mRNA is abnormally spliced to produce two truncated transcript variants (E28C and D) that activate the unfolded protein response (UPR). We tested whether SCN5A post-transcriptional regulation was abnormal in hypertrophic cardiomyopathy (HCM). MATERIAL AND METHODS Human heart tissue was obtained from HCM patients. The changes in relative abundances of SCN5A, its variants, splicing factors RBM25 and LUC7A, and PERK, a major effector of the UPR, were analyzed by real time RT-PCR and the expression changes were confirmed by Western Blot. RESULTS We found reduced full-length transcript, increased SCN5A truncation variants and activation of UPR in HCM when compared to control hearts. In these patients, real time RT-PCR revealed that HCM patients had decreased SCN5A mRNA to 27.8±4.07% of control (P<0.01) and an increased abundance of E28C and E28D (3.4±0.3 and 2.8±0.3-fold, respectively, P<0.05). PERK mRNA increased 8.2±3.1 fold (P<0.01) in HCM patients. Western blot confirmed a significant increase of PERK. CONCLUSIONS These data suggested that the full-length SCN5A was reduced in patients with HCM. This reduction was accompanied by abnormal SCN5A pre-mRNA splicing and UPR activation. These changes may contribute to the arrhythmic risk in HCM.
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Luo L, Ning F, Du Y, Song B, Yang D, Salvage SC, Wang Y, Fraser JA, Zhang S, Ma A, Wang T. Calcium-dependent Nedd4-2 upregulation mediates degradation of the cardiac sodium channel Nav1.5: implications for heart failure. Acta Physiol (Oxf) 2017; 221:44-58. [PMID: 28296171 DOI: 10.1111/apha.12872] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 12/08/2016] [Accepted: 03/03/2017] [Indexed: 12/18/2022]
Abstract
AIM Reductions in voltage-gated sodium channel (Nav1.5) function/expression provide a slowed-conduction substrate for cardiac arrhythmias. Nedd4-2, which is activated by calcium, post-translationally modulates Nav1.5. We aim to investigate whether elevated intracellular calcium ([Ca2+ ]i ) reduces Nav1.5 through Nedd4-2 and its role in heart failure (HF). METHODS Using a combination of biochemical, electrophysiological, cellular and in vivo methods, we tested the effect and mechanism of calcium on Nedd4-2 and in turn Nav1.5. RESULTS Increased [Ca2+ ]i , following 24-h ionomycin treatment, decreased sodium current (INa ) density and Nav1.5 protein without altering its mRNA in both neonatal rat cardiomyocytes (NRCMs) and HEK 293 cells stably expressing Nav1.5. The calcium chelator BAPTA-AM restored the reduced Nav1.5 and INa in NRCMs pre-treated by ionomycin. Nav1.5 was decreased by Nedd4-2 transfection and further decreased by 6-h ionomycin treatment. These effects were not observed in cells transfected with the catalytically inactive mutant, Nedd4-2 C801S, or with Y1977A-Nav1.5 mutant containing the impaired Nedd4-2 binding motif. Furthermore, elevated [Ca2+ ]i increased Nedd4-2, the interaction between Nedd4-2 and Nav1.5, and Nav1.5 ubiquitination. Nav1.5 protein is decreased, whereas Nedd4-2 is increased in volume-overload HF rat hearts, with increased co-localization of Nav1.5 with ubiquitin or Nedd4-2 as indicated by immunofluorescence staining. BAPTA-AM rescued the reduced Nav1.5 protein, INa and increased Nedd4-2 in hypertrophied NRCMs induced by isoproterenol or angiotensin II. CONCLUSION Calcium-mediated increases in Nedd4-2 downregulate Nav1.5 by ubiquitination. Nav1.5 is downregulated and co-localizes with Nedd4-2 and ubiquitin in failing rat heart. These data suggest a role of Nedd4-2 in Nav1.5 downregulation in HF.
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Affiliation(s)
- L. Luo
- Department of Cardiovascular Medicine; First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
| | - F. Ning
- Department of Cardiovascular Medicine; First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
| | - Y. Du
- Department of Cardiovascular Medicine; First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
| | - B. Song
- Department of Cardiovascular Medicine; First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
| | - D. Yang
- Department of Cardiovascular Medicine; First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
| | - S. C. Salvage
- Physiological Laboratory; University of Cambridge; Cambridge UK
| | - Y. Wang
- Department of Cardiovascular Medicine; First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
| | - J. A. Fraser
- Physiological Laboratory; University of Cambridge; Cambridge UK
| | - S. Zhang
- Department of Biomedical and Molecular Sciences; Queen's University; Kingston Ontario Canada
| | - A. Ma
- Department of Cardiovascular Medicine; First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
- Key Laboratory of Molecular Cardiology; Xi'an Shaanxi Province China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University); Ministry of Education; Xi'an China
| | - T. Wang
- Department of Cardiovascular Medicine; First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
- Key Laboratory of Molecular Cardiology; Xi'an Shaanxi Province China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University); Ministry of Education; Xi'an China
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Badreddin A, Fady Y, Attia H, Hafez M, Khairallah A, Johar D, Bernstein L. What role does the stress response have in congestive heart failure? J Cell Physiol 2017; 233:2863-2870. [PMID: 28493471 DOI: 10.1002/jcp.26003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Accepted: 05/10/2017] [Indexed: 01/10/2023]
Abstract
This review is concerned with cardiac malfunction as a result of an imbalance in protein proteostasis, the homeostatic balance between protein removal and regeneration in a long remodeling process involving the endoplasmic reticulum (ER) and the unfolded protein response (UPR). The importance of this is of special significance with regard to cardiac function as a high energy requiring muscular organ that has a high oxygen requirement and is highly dependent on mitochondria. The importance of mitochondria is not only concerned with high energy dependence on mitochondrial electron transport, but it also has a role in the signaling between the mitochondria and the ER under stress. Proteins made in the ER are folded as a result of sulfhydryl groups (-SH) and attractive and repulsive reactions in the tertiary structure. We discuss how this matters with respect to an imbalance between muscle breakdown and repair in a stressful environment, especially as a result of oxidative and nitrosative byproducts of mitochondrial activity. The normal repair is a remodeling, but under this circumstance, the cell undergoes or even lysosomal "self eating" autophagy, or even necrosis instead of apoptosis. We shall discuss the relationship of the UPR pathway to chronic congestive heart failure (CHF).
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Affiliation(s)
- Ahmed Badreddin
- Department of Cardiothoracic Surgery, Beni-Suef University Faculty of Medicine, Beni-Suef, Egypt
| | - Youssef Fady
- Department of Cardiac Surgery, Cardiac Surgery Center Sultan Qaboos Hospital, Salalah, Dhofar, Sultanate of Oman, Salalah, Oman
| | - Hamdy Attia
- Kasr Al'Ainy Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Mohamed Hafez
- Kasr Al'Ainy Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Ahmed Khairallah
- Medical Research Division, Department of Pharmacology, National Research Centre, Dokki, Cairo, Egypt
| | - Dina Johar
- Faculty of Women for Arts, Sciences, and Education, Department of Biochemistry and Nutrition, Ain Shams University, Heliopolis, Cairo, Egypt.,Max Rady Faculty of Health Sciences, Department of Physiology and Pathophysiology, Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
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Bao Q, Zhao M, Chen L, Wang Y, Wu S, Wu W, Liu X. MicroRNA-297 promotes cardiomyocyte hypertrophy via targeting sigma-1 receptor. Life Sci 2017; 175:1-10. [PMID: 28286226 DOI: 10.1016/j.lfs.2017.03.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 03/04/2017] [Accepted: 03/09/2017] [Indexed: 02/05/2023]
Abstract
AIMS Sigma-1 receptor (Sig-1R) is a ligand-regulated endoplasmic reticulum (ER) chaperone involved in cardiac hypertrophy, but it is not known whether Sig-1R is regulated by microRNAs (miRNAs). According to bioinformatic analysis, miR-297 was suggested as a potential target miRNA for Sig-1R. Therefore, we verified whether miR-297 could target Sig-1R and investigated the possible mechanisms underlying the role of miR-297 in cardiac hypertrophy. MAIN METHODS Bioinformatic analysis combined with laboratory experiments, including quantitative RT-PCR, Western blotting, and luciferase assay, were performed to identify the target miRNA of Sig-1R. Transverse aortic constriction (TAC) model and neonatal rat cardiomyocytes (NCMs) stimulated with angiotensin II (AngII) were used to explore the relationship between miR-297 and Sig-1R. Additionally, the function of miR-297 in cardiomyocyte hypertrophy and ER stress/unfolded protein response (UPR) signaling pathway was investigated by transfecting miR-297 mimics/inhibitor. KEY FINDINGS miR-297 levels were increased in both TAC-induced hypertrophic heart tissue and AngII-induced cardiomyocyte hypertrophy. Up-regulation of miR-297 by specific mimics exacerbated AngII-induced cardiomyocyte hypertrophy, whereas inhibition of miR-297 suppressed the process. During cardiomyocyte hypertrophy, Sig-1R expression, which was negatively regulated by miR-297 by directly targeting its 3'untranslated region (UTR), was decreased. Furthermore, attenuation of miR-297 inhibited the activation of X-box binding protein 1 (Xbp1) and activating transcriptional factor 4 (ATF4) signaling pathways in NCMs. SIGNIFICANCE Our data demonstrate that miR-297 promotes cardiomyocyte hypertrophy by inhibiting the expression of Sig-1R and activation of ER stress signaling, which provides a novel interpretation for cardiac hypertrophy.
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Affiliation(s)
- Qinxue Bao
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China
| | - Mingyue Zhao
- Laboratory of Cardiovascular Diseases, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - Li Chen
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China
| | - Yu Wang
- Laboratory of Molecular Diagnosis of Cancer, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Siyuan Wu
- Laboratory of Cardiovascular Diseases, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - Wenchao Wu
- Laboratory of Cardiovascular Diseases, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - Xiaojing Liu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China; Laboratory of Cardiovascular Diseases, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China.
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Jensen BC, Bultman SJ, Holley D, Tang W, de Ridder G, Pizzo S, Bowles D, Willis MS. Upregulation of autophagy genes and the unfolded protein response in human heart failure. Int J Clin Exp Med 2017; 10:1051-1058. [PMID: 28794819 PMCID: PMC5546743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The cellular environment of the mammalian heart constantly is challenged with environmental and intrinsic pathological insults, which affect the proper folding of proteins in heart failure. The effects of damaged or misfolded proteins on the cell can be profound and result in a process termed "proteotoxicity". While proteotoxicity is best known for its role in mediating the pathogenesis of neurodegenerative diseases such as Alzheimer's disease, its role in human heart failure also has been recognized. The UPR involves three branches, including PERK, ATF6, and IRE1. In the presence of a misfolded protein, the GRP78 molecular chaperone that normally interacts with the receptors PERK, ATF6, and IRE-1 in the endoplasmic reticulum detaches to attempt to stabilize the protein. Mouse models of cardiac hypertrophy, ischemia, and heart failure demonstrate increases in activity of all three branches after removing GRP78 from these internal receptors. Recent studies have linked elevated PERK and CHOP in vitro with regulation of ion channels linked with human systolic heart failure. With this in mind, we specifically investigated ventricular myocardium from 10 patients with a history of conduction system defects or arrhythmias for expression of UPR and autophagy genes compared to myocardium from non-failing controls. We identified elevated Chop, Atf3, and Grp78 mRNA, along with XBP-1-regulated Cebpa mRNA, indicative of activation of the UPR in human heart failure with arrhythmias.
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Affiliation(s)
- Brian C Jensen
- Division of Cardiology, Department of Internal Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
- McAllister Heart Institute, University of North Carolina, Chapel Hill, NC 27599, USA
- Department of Pharmacology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Scott J Bultman
- Division of Cardiology, Department of Internal Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
- Department of Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Darcy Holley
- Division of Cardiology, Department of Internal Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Wei Tang
- Department of Pathology & Laboratory Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
| | | | - Salvatore Pizzo
- Department of Pathology, Duke University, Durham, NC 27710, USA
| | - Dawn Bowles
- Department of Duke University, Durham, NC 27710, USA
| | - Monte S Willis
- McAllister Heart Institute, University of North Carolina, Chapel Hill, NC 27599, USA
- Department of Pathology & Laboratory Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
- Department of Pharmacology, University of North Carolina, Chapel Hill, NC 27599, USA
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Tse G, Yan BP, Chan YWF, Tian XY, Huang Y. Reactive Oxygen Species, Endoplasmic Reticulum Stress and Mitochondrial Dysfunction: The Link with Cardiac Arrhythmogenesis. Front Physiol 2016; 7:313. [PMID: 27536244 PMCID: PMC4971160 DOI: 10.3389/fphys.2016.00313] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 07/11/2016] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Cardiac arrhythmias represent a significant problem globally, leading to cerebrovascular accidents, myocardial infarction, and sudden cardiac death. There is increasing evidence to suggest that increased oxidative stress from reactive oxygen species (ROS), which is elevated in conditions such as diabetes and hypertension, can lead to arrhythmogenesis. METHOD A literature review was undertaken to screen for articles that investigated the effects of ROS on cardiac ion channel function, remodeling and arrhythmogenesis. RESULTS Prolonged endoplasmic reticulum stress is observed in heart failure, leading to increased production of ROS. Mitochondrial ROS, which is elevated in diabetes and hypertension, can stimulate its own production in a positive feedback loop, termed ROS-induced ROS release. Together with activation of mitochondrial inner membrane anion channels, it leads to mitochondrial depolarization. Abnormal function of these organelles can then activate downstream signaling pathways, ultimately culminating in altered function or expression of cardiac ion channels responsible for generating the cardiac action potential (AP). Vascular and cardiac endothelial cells become dysfunctional, leading to altered paracrine signaling to influence the electrophysiology of adjacent cardiomyocytes. All of these changes can in turn produce abnormalities in AP repolarization or conduction, thereby increasing likelihood of triggered activity and reentry. CONCLUSION ROS plays a significant role in producing arrhythmic substrate. Therapeutic strategies targeting upstream events include production of a strong reducing environment or the use of pharmacological agents that target organelle-specific proteins and ion channels. These may relieve oxidative stress and in turn prevent arrhythmic complications in patients with diabetes, hypertension, and heart failure.
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Affiliation(s)
- Gary Tse
- Li Ka Shing Faculty of Medicine, School of Biomedical Sciences, University of Hong KongHong Kong, China
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong KongHong Kong, China
| | - Bryan P. Yan
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong KongHong Kong, China
- Department of Epidemiology and Preventive Medicine, Monash UniversityMelbourne, VIC, Australia
| | - Yin W. F. Chan
- Department of Psychology, School of Biological Sciences, University of CambridgeCambridge, UK
| | - Xiao Yu Tian
- Faculty of Medicine, School of Biomedical Sciences, Chinese University of Hong KongHong Kong, China
| | - Yu Huang
- Faculty of Medicine, School of Biomedical Sciences, Chinese University of Hong KongHong Kong, China
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Ortega A, Roselló-Lletí E, Tarazón E, Gil-Cayuela C, Lago F, González-Juanatey JR, Martinez-Dolz L, Portolés M, Rivera M. TRPM7 is down-regulated in both left atria and left ventricle of ischaemic cardiomyopathy patients and highly related to changes in ventricular function. ESC Heart Fail 2016; 3:220-224. [PMID: 27818786 PMCID: PMC5071679 DOI: 10.1002/ehf2.12085] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 01/12/2016] [Accepted: 01/17/2016] [Indexed: 01/17/2023] Open
Abstract
Aims The kinase ion channel transient receptor potential melastatin 7 (TRPM7) is considered a modulator of cardiac fibrosis progression; nevertheless, we lack of studies analysing its role in human ischaemic cardiomyopathy (ICM). Our objective was to analyse the expression of genes encoding cardiac ion channels in human ICM, focusing on the alterations in mRNA levels of TRPM7 and its relationship with changes in the ventricular function. Methods and results RNA‐sequencing was carried out in 13 left ventricular (LV) samples of patients with ICM compared with a control group (n = 10). The analysis revealed a total of 25 ion channel genes differentially expressed. We performed an RTqPCR analysis of the TRPM7 mRNA in LV and left atrial samples and found that it was down‐regulated in both cavities (−1.43‐fold and −1.52‐fold, respectively). Atrial TRPM7 mRNA levels showed an excellent and inverse relationships with the depressed ejection fraction (r = −0.724, P = 0.042) and with the mitral A wave (r = −0.938, P = 0.006). Conclusions We report the down‐regulation of TRPM7 in tissue samples from both left atria and left ventricle in patients with ICM. We found an inverse relationship between both cardiac chambers mRNA levels with LV dysfunction, suggesting an important role of TRPM7 in the left atrial and LV functional depression found in this cardiomyopathy.
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Affiliation(s)
- Ana Ortega
- Cardiocirculatory Unit Health Research Institute of La Fe University Hospital Valencia Spain
| | - Esther Roselló-Lletí
- Cardiocirculatory Unit Health Research Institute of La Fe University Hospital Valencia Spain
| | - Estefanía Tarazón
- Cardiocirculatory Unit Health Research Institute of La Fe University Hospital Valencia Spain
| | - Carolina Gil-Cayuela
- Cardiocirculatory Unit Health Research Institute of La Fe University Hospital Valencia Spain
| | - Francisca Lago
- Cellular and Molecular Cardiology Research Unit, Department of Cardiology and Institute of Biomedical Research University Clinical Hospital Santiago de Compostela Spain
| | - Jose-Ramón González-Juanatey
- Cellular and Molecular Cardiology Research Unit, Department of Cardiology and Institute of Biomedical Research University Clinical Hospital Santiago de Compostela Spain
| | - Luis Martinez-Dolz
- Heart Failure and Transplantation Unit, Cardiology Department La Fe University Hospital Valencia Spain
| | - Manuel Portolés
- Cardiocirculatory Unit Health Research Institute of La Fe University Hospital Valencia Spain
| | - Miguel Rivera
- Cardiocirculatory Unit Health Research Institute of La Fe University Hospital Valencia Spain
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43
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Liu M, Dudley SC. Role for the Unfolded Protein Response in Heart Disease and Cardiac Arrhythmias. Int J Mol Sci 2015; 17:ijms17010052. [PMID: 26729106 PMCID: PMC4730297 DOI: 10.3390/ijms17010052] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 12/14/2015] [Accepted: 12/16/2015] [Indexed: 12/23/2022] Open
Abstract
The unfolded protein response (UPR) has been extensively investigated in neurological diseases and diabetes, while its function in heart disease is less well understood. Activated UPR participates in multiple cardiac conditions and can either protect or impair heart function. Recently, the UPR has been found to play a role in arrhythmogenesis during human heart failure by affecting cardiac ion channels expression, and blocking UPR has an antiarrhythmic effect. This review will discuss the rationale for and challenges to targeting UPR in heart disease for treatment of arrhythmias.
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Affiliation(s)
- Man Liu
- The Warren Alpert Medical School of Brown University, Lifespan Cardiovascular Institute, the Providence VA Medical Center, 593 Eddy Street, APC814, Providence, RI 02903, USA.
| | - Samuel C Dudley
- The Warren Alpert Medical School of Brown University, Lifespan Cardiovascular Institute, the Providence VA Medical Center, 593 Eddy Street, APC814, Providence, RI 02903, USA.
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Yang KC, Kyle JW, Makielski JC, Dudley SC. Mechanisms of sudden cardiac death: oxidants and metabolism. Circ Res 2015; 116:1937-55. [PMID: 26044249 PMCID: PMC4458707 DOI: 10.1161/circresaha.116.304691] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Accepted: 02/09/2015] [Indexed: 02/07/2023]
Abstract
Ventricular arrhythmia is the leading cause of sudden cardiac death (SCD). Deranged cardiac metabolism and abnormal redox state during cardiac diseases foment arrhythmogenic substrates through direct or indirect modulation of cardiac ion channel/transporter function. This review presents current evidence on the mechanisms linking metabolic derangement and excessive oxidative stress to ion channel/transporter dysfunction that predisposes to ventricular arrhythmias and SCD. Because conventional antiarrhythmic agents aiming at ion channels have proven challenging to use, targeting arrhythmogenic metabolic changes and redox imbalance may provide novel therapeutics to treat or prevent life-threatening arrhythmias and SCD.
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Affiliation(s)
- Kai-Chien Yang
- From the Department of Pharmacology (K.-C.Y.) and Division of Cardiology, Department of Internal Medicine (K.-C.Y.), National Taiwan University Hospital, Taipei, Taiwan; Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin, Madison (J.W.K., J.C.M.); and Lifespan Cardiovascular Institute, the Providence VA Medical Center, and Brown University, RI (S.C.D.)
| | - John W Kyle
- From the Department of Pharmacology (K.-C.Y.) and Division of Cardiology, Department of Internal Medicine (K.-C.Y.), National Taiwan University Hospital, Taipei, Taiwan; Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin, Madison (J.W.K., J.C.M.); and Lifespan Cardiovascular Institute, the Providence VA Medical Center, and Brown University, RI (S.C.D.)
| | - Jonathan C Makielski
- From the Department of Pharmacology (K.-C.Y.) and Division of Cardiology, Department of Internal Medicine (K.-C.Y.), National Taiwan University Hospital, Taipei, Taiwan; Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin, Madison (J.W.K., J.C.M.); and Lifespan Cardiovascular Institute, the Providence VA Medical Center, and Brown University, RI (S.C.D.).
| | - Samuel C Dudley
- From the Department of Pharmacology (K.-C.Y.) and Division of Cardiology, Department of Internal Medicine (K.-C.Y.), National Taiwan University Hospital, Taipei, Taiwan; Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin, Madison (J.W.K., J.C.M.); and Lifespan Cardiovascular Institute, the Providence VA Medical Center, and Brown University, RI (S.C.D.).
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Zhang SM, Xie ZP, Xu ML, Shi LF. Cardioprotective effects of fucoidan against hypoxia-induced apoptosis in H9c2 cardiomyoblast cells. PHARMACEUTICAL BIOLOGY 2015; 53:1352-1357. [PMID: 25874385 DOI: 10.3109/13880209.2014.982298] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
CONTEXT Cardiomyocyte apoptosis plays a critical role in the progress of heart diseases. Fucoidan, a complex-sulfated polysaccharide, has been reported to possess potential cardioprotective efficacy in vivo. OBJECTIVE The present study determines whether fucoidan could provide cardioprotection on hypoxia-induced cardiomyocyte apoptosis. MATERIALS AND METHODS H9c2 cardiomyoblast cells were incubated with various concentrations (15, 30, and 60 μg/ml) of fucoidan in a humidified incubator at 37 °C with 95% O2 and 5% CO2. After 6 h, hypoxia was processed and the cardioprotective effects of fucoidan were evaluated by applying MTT, ELISA, Hoechst 33258 nucleus staining, and western blot. RESULTS Following a 6 h exposure of H9c2 to hypoxic condition, significant reduction was found in cell survival (0.57-fold) and superoxide dismutase (SOD) activity (0.56-fold), which were associated with the increase of malondialdehyde (MDA) level (2.58-fold), creatine phosphokinase (CK, 3.57-fold), and lactate dehydrogenase (LDH) activities (2.39-fold). Moreover, hypoxia-induced apoptosis was confirmed by Hoechst 33258 nuclear staining, and these changes were accompanied by the increase of Bcl-2 (1.27-fold) and Bax expression (2.6-fold). However, preincubation of the cells with fucoidan prior to hypoxia exposure elevated the cell viability (30 μg/ml, 1.18-fold; 60 μg/ml, 1.32-fold) and SOD activity (30 μg/ml, 1.12-fold; 60 μg/ml, 1.25-fold), but decreased the MDA level (30 μg/ml, 0.70-fold; 60 μg/ml, 0.80-fold), CK (30 μg/ml, 0.69-fold; 60 μg/ml, 0.76-fold), and LDH (30 μg/ml, 0.67-fold; 60 μg/ml, 0.86-fold) leakages. Hoechst 33258 nuclear staining observations demonstrated the same protective effect of fucoidan on hypoxia-induced myocardial injury. Also, cardioprotective effects of fucoidan were reflected by increasing Bcl-2 (60 μg/ml, 1.84-fold), as well as decreasing Bax (60 μg/ml, 0.6-fold). CONCLUSION Fucoidan had protective effect against hypoxia-induced cardiomyocytes apoptosis, and the mechanism might involve protections of the cell from oxidative injury.
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Affiliation(s)
- S M Zhang
- School of Pharmacy, Binzhou Medical College , Yantai , China and
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Abstract
Mutations of the cardiac sodium channel (Nav1.5) can induce gain or loss of channel function. Gain-of-function mutations can cause long QT syndrome type 3 and possibly atrial fibrillation, whereas loss-of-function mutations are associated with a variety of phenotypes, such as Brugada syndrome, cardiac conduction disease, sick sinus syndrome, and possibly dilated cardiomyopathy. The phenotypes produced by Nav1.5 mutations vary according to the direct effect of the mutation on channel biophysics, but also with age, sex, body temperature, and between regions of the heart. This phenotypic variability makes genotype-phenotype correlations difficult. In this Perspectives article, we propose that phenotypic variability not ascribed to mutation-dependent changes in channel function might be the result of additional modifiers of channel behaviour, such as other genetic variation and alterations in transcription, RNA processing, translation, post-translational modifications, and protein degradation. Consideration of these modifiers might help to improve genotype-phenotype correlations and lead to new therapeutic strategies.
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Affiliation(s)
- Man Liu
- Warren Alpert Medical School, Brown University, 593 Eddy Street, APC730, Providence, RI 02903, USA
| | - Kai-Chien Yang
- Warren Alpert Medical School, Brown University, 593 Eddy Street, APC730, Providence, RI 02903, USA
| | - Samuel C Dudley
- Warren Alpert Medical School, Brown University, 593 Eddy Street, APC730, Providence, RI 02903, USA
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Beltran-Alvarez P, Tarradas A, Chiva C, Pérez-Serra A, Batlle M, Pérez-Villa F, Schulte U, Sabidó E, Brugada R, Pagans S. Identification of N-terminal protein acetylation and arginine methylation of the voltage-gated sodium channel in end-stage heart failure human heart. J Mol Cell Cardiol 2014; 76:126-9. [PMID: 25172307 DOI: 10.1016/j.yjmcc.2014.08.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 07/25/2014] [Accepted: 08/15/2014] [Indexed: 11/30/2022]
Abstract
The α subunit of the cardiac voltage-gated sodium channel, NaV1.5, provides the rapid sodium inward current that initiates cardiomyocyte action potentials. Here, we analyzed for the first time the post-translational modifications of NaV1.5 purified from end-stage heart failure human cardiac tissue. We identified R526 methylation as the major post-translational modification of any NaV1.5 arginine or lysine residue. Unexpectedly, we found that the N terminus of NaV1.5 was: 1) devoid of the initiation methionine, and 2) acetylated at the resulting initial alanine residue. This is the first evidence for N-terminal acetylation in any member of the voltage-gated ion channel superfamily. Our results open the door to explore NaV1.5 N-terminal acetylation and arginine methylation levels as drivers or markers of end-stage heart failure.
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Affiliation(s)
- Pedro Beltran-Alvarez
- Cardiovascular Genetics Center, Institut d'Investigació Biomèdica de Girona, 17003 Girona, Spain.
| | - Anna Tarradas
- Cardiovascular Genetics Center, Institut d'Investigació Biomèdica de Girona, 17003 Girona, Spain; Department of Medical Sciences, School of Medicine, University of Girona, 17003 Girona, Spain
| | - Cristina Chiva
- Proteomics Unit, Centre for Genomic Regulation (CRG), 08003 Barcelona, Spain; Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
| | - Alexandra Pérez-Serra
- Cardiovascular Genetics Center, Institut d'Investigació Biomèdica de Girona, 17003 Girona, Spain; Department of Medical Sciences, School of Medicine, University of Girona, 17003 Girona, Spain
| | - Montserrat Batlle
- Thorax Institute, Cardiology Department, Hospital Clínic, University of Barcelona, Institute of Biomedical Research August Pi i Sunyer, 08036 Barcelona, Spain
| | - Félix Pérez-Villa
- Thorax Institute, Cardiology Department, Hospital Clínic, University of Barcelona, Institute of Biomedical Research August Pi i Sunyer, 08036 Barcelona, Spain
| | - Uwe Schulte
- Logopharm GmbH, 79232 March-Buchheim, Germany
| | - Eduard Sabidó
- Proteomics Unit, Centre for Genomic Regulation (CRG), 08003 Barcelona, Spain; Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
| | - Ramon Brugada
- Cardiovascular Genetics Center, Institut d'Investigació Biomèdica de Girona, 17003 Girona, Spain; Department of Medical Sciences, School of Medicine, University of Girona, 17003 Girona, Spain.
| | - Sara Pagans
- Cardiovascular Genetics Center, Institut d'Investigació Biomèdica de Girona, 17003 Girona, Spain; Department of Medical Sciences, School of Medicine, University of Girona, 17003 Girona, Spain.
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48
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Abstract
In neurological disease and diabetes, the unfolded protein response (UPR) has been investigated for years, while its function in heart disease is less well understood. All three branches of the UPR are involved in ischaemia/reperfusion and can either protect or impair heart function. Recently, UPR has been found to play a role in arrhythmogenesis during human heart failure, and blocking UPR has an antiarrhythmic effect. This review will discuss the rationale for and challenges to targeting UPR in heart disease.
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Affiliation(s)
- Man Liu
- Brown University, Lifespan Cardiovascular Institute, The Providence VA Medical Center , Providence, RI , USA
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49
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Gao G, Brahmanandam V, Raicu M, Gu L, Zhou L, Kasturirangan S, Shah A, Negi SI, Wood MR, Desai AA, Tatooles A, Schwartz A, Dudley SC. Enhanced risk profiling of implanted defibrillator shocks with circulating SCN5A mRNA splicing variants: a pilot trial. J Am Coll Cardiol 2014; 63:2261-9. [PMID: 24703920 DOI: 10.1016/j.jacc.2014.02.588] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 01/26/2014] [Accepted: 02/04/2014] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The aim of this study was to determine the association of SCN5A cardiac sodium (Na(+)) channel mRNA splice variants in white blood cells (WBCs) with risk of arrhythmias in heart failure (HF). BACKGROUND HF is associated with upregulation of two cardiac SCN5A mRNA splice variants that encode prematurely truncated, nonfunctional Na(+) channels. Because circulating WBCs demonstrate similar SCN5A splicing patterns, we hypothesized that these WBC-derived splice variants might further stratify patients with HF who are at risk for arrhythmias. METHODS Simultaneously obtained myocardial core samples and WBCs were compared for SCN5A variants C (VC) and D (VD). Circulating variant levels were compared among patients with HF, divided into three groups: HF without an implantable cardioverter-defibrillator (ICD), HF with an ICD without appropriate intervention, and HF with an ICD with appropriate intervention. RESULTS Myocardial tissue-derived SCN5A variant expression levels strongly correlated with circulating WBC samples for both VC and VD variants (r = 0.78 and 0.75, respectively). After controlling for covariates, patients with HF who had received an appropriate ICD intervention had higher expression levels of both WBC-derived SCN5A variants compared with patients with HF with ICDs who had not received appropriate ICD intervention (odds ratio, 3.25; 95% CI, 1.64-6.45; p = 0.001). Receiver operating characteristic analysis revealed that circulating SCN5A variant levels were highly associated with the risk for appropriate ICD intervention (area under the curve ≥0.97). CONCLUSIONS Circulating expression levels of SCN5A variants were strongly associated with myocardial tissue levels. Furthermore, circulating variant levels were correlative with arrhythmic risk as measured by ICD events in an HF population within 1 year. (Sodium Channel Splicing in Heart Failure Trial [SOCS-HEFT]; NCT01185587).
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Affiliation(s)
- Ge Gao
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois
| | - Vikram Brahmanandam
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois
| | - Mihai Raicu
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois
| | - Lianzhi Gu
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois
| | - Li Zhou
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois
| | - Srinivasan Kasturirangan
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois
| | - Anish Shah
- University of Illinois at Chicago College of Medicine, Chicago, Illinois
| | - Smita I Negi
- The University of Texas Health Science Center, Houston, Texas
| | - Melissa R Wood
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois
| | - Ankit A Desai
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois; Institute for Personalized Respiratory Medicine and Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois
| | - Antone Tatooles
- Transplant/Mechanical Assist, Advocate Christ Medical Center, Oak Lawn, Illinois
| | - Alan Schwartz
- Departments of Medical Education and Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| | - Samuel C Dudley
- Section of Cardiology and the Jesse Brown VAMC, University of Illinois at Chicago, Chicago, Illinois.
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