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Asjad E, Dobrzynski H. MicroRNAs: Midfielders of Cardiac Health, Disease and Treatment. Int J Mol Sci 2023; 24:16207. [PMID: 38003397 PMCID: PMC10671258 DOI: 10.3390/ijms242216207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/05/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
MicroRNAs (miRNAs) are a class of small non-coding RNA molecules that play a role in post-transcriptional gene regulation. It is generally accepted that their main mechanism of action is the negative regulation of gene expression, through binding to specific regions in messenger RNA (mRNA) and repressing protein translation. By interrupting protein synthesis, miRNAs can effectively turn genes off and influence many basic processes in the body, such as developmental and apoptotic behaviours of cells and cardiac organogenesis. Their importance is highlighted by inhibiting or overexpressing certain miRNAs, which will be discussed in the context of coronary artery disease, atrial fibrillation, bradycardia, and heart failure. Dysregulated levels of miRNAs in the body can exacerbate or alleviate existing disease, and their omnipresence in the body makes them reliable as quantifiable markers of disease. This review aims to provide a summary of miRNAs as biomarkers and their interactions with targets that affect cardiac health, and intersperse it with current therapeutic knowledge. It intends to succinctly inform on these topics and guide readers toward more comprehensive works if they wish to explore further through a wide-ranging citation list.
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Affiliation(s)
- Emman Asjad
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PL, UK;
| | - Halina Dobrzynski
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PL, UK;
- Department of Anatomy, Jagiellonian University Medical College, 31-034 Krakow, Poland
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2
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Sekine O, Kanaami S, Masumoto K, Aihara Y, Morita-Umei Y, Tani H, Soma Y, Umei TC, Haga K, Moriwaki T, Kawai Y, Ohno M, Kishino Y, Kanazawa H, Fukuda K, Ieda M, Tohyama S. Seamless and non-destructive monitoring of extracellular microRNAs during cardiac differentiation from human pluripotent stem cells. Stem Cell Reports 2023; 18:1925-1939. [PMID: 37738969 PMCID: PMC10656301 DOI: 10.1016/j.stemcr.2023.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 08/20/2023] [Accepted: 08/21/2023] [Indexed: 09/24/2023] Open
Abstract
Monitoring cardiac differentiation and maturation from human pluripotent stem cells (hPSCs) and detecting residual undifferentiated hPSCs are indispensable for the development of cardiac regenerative therapy. MicroRNA (miRNA) is secreted from cells into the extracellular space, and its role as a biomarker is attracting attention. Here, we performed an miRNA array analysis of supernatants during the process of cardiac differentiation and maturation from hPSCs. We demonstrated that the quantification of extracellular miR-489-3p and miR-1/133a-3p levels enabled the monitoring of mesoderm and cardiac differentiation, respectively, even in clinical-grade mass culture systems. Moreover, extracellular let-7c-5p levels showed the greatest increase with cardiac maturation during long-term culture. We also verified that residual undifferentiated hPSCs in hPSC-derived cardiomyocytes (hPSC-CMs) were detectable by measuring miR-302b-3p expression, with a detection sensitivity of 0.01%. Collectively, we demonstrate that our method of seamlessly monitoring specific miRNAs secreted into the supernatant is non-destructive and effective for the quality evaluation of hPSC-CMs.
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Affiliation(s)
- Otoya Sekine
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Sayaka Kanaami
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Heartseed Inc, The Artcomplex Center of Tokyo, #302, 12-9, Daikyo-cho, Shinjuku-ku, Tokyo 160-0015, Japan
| | - Kanako Masumoto
- Sysmex Corporation, Central Research Laboratories, 4-4-4 Takatsukadai, Nishi-ku, Kobe 651-2271, Japan
| | - Yuki Aihara
- Sysmex Corporation, Central Research Laboratories, 4-4-4 Takatsukadai, Nishi-ku, Kobe 651-2271, Japan
| | - Yuika Morita-Umei
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Kanagawa Institute of Industrial Science and Technology (KISTEC), Kawasaki, Kanagawa, Japan
| | - Hidenori Tani
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Joint Research Laboratory for Medical Innovation in Heart Disease, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Yusuke Soma
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Tomohiko C Umei
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Kotaro Haga
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Taijun Moriwaki
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Yujiro Kawai
- Department of Cardiovascular Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Masatoshi Ohno
- Department of Cardiovascular Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Yoshikazu Kishino
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Hideaki Kanazawa
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Keiichi Fukuda
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Heartseed Inc, The Artcomplex Center of Tokyo, #302, 12-9, Daikyo-cho, Shinjuku-ku, Tokyo 160-0015, Japan
| | - Masaki Ieda
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Shugo Tohyama
- Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
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Mildeberger L, Bueto J, Wilmes V, Scheiper-Welling S, Niess C, Gradhand E, Verhoff MA, Kauferstein S. Suitable biomarkers for post-mortem differentiation of cardiac death causes: Quantitative analysis of miR-1, miR-133a and miR-26a in heart tissue and whole blood. Forensic Sci Int Genet 2023; 65:102867. [PMID: 37178622 DOI: 10.1016/j.fsigen.2023.102867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 02/03/2023] [Accepted: 03/24/2023] [Indexed: 04/03/2023]
Abstract
Cardiovascular diseases are the most common causes of death worldwide. Cardiac death can occur as reaction to myocardial infarction (MI). A diagnostic challenge arises for sudden unexpected death (SUD) cases with structural abnormalities (SA) or without any structural abnormalities (without SA). Therefore, the identification of reliable biomarkers to differentiate cardiac cases from each other is necessary. In the current study, the potential of different microRNAs (miRNAs) as biomarkers in tissue and blood samples of cardiac death cases was analyzed. Blood and tissue samples of 24 MI, 21 SUD and 5 control (C) cases were collected during autopsy. Testing for significance and receiver operating characteristic analysis (ROC) were performed. The results show that miR-1, miR-133a and miR-26a possess a high diagnostic power to discriminate between different cardiac death causes in whole blood and in tissue.
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Wang R, Bektik E, Sakon P, Wang X, Huang S, Meng X, Chen M, Han W, Chen J, Wang Y, Zhong J. Integrated Analysis of the microRNA–mRNA Network Predicts Potential Regulators of Atrial Fibrillation in Humans. Cells 2022; 11:2629. [PMID: 36078037 PMCID: PMC9454849 DOI: 10.3390/cells11172629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/15/2022] [Accepted: 08/15/2022] [Indexed: 11/17/2022] Open
Abstract
Atrial fibrillation (AF) is a form of sustained cardiac arrhythmia and microRNAs (miRs) play crucial roles in the pathophysiology of AF. To identify novel miR–mRNA pairs, we performed RNA-seq from atrial biopsies of persistent AF patients and non-AF patients with normal sinus rhythm (SR). Differentially expressed miRs (11 down and 9 up) and mRNAs (95 up and 82 down) were identified and hierarchically clustered in a heat map. Subsequently, GO, KEGG, and GSEA analyses were run to identify deregulated pathways. Then, miR targets were predicted in the miRDB database, and a regulatory network of negatively correlated miR–mRNA pairs was constructed using Cytoscape. To select potential candidate genes from GSEA analysis, the top-50 enriched genes in GSEA were overlaid with predicted targets of differentially deregulated miRs. Further, the protein–protein interaction (PPI) network of enriched genes in GSEA was constructed, and subsequently, GO and canonical pathway analyses were run for genes in the PPI network. Our analyses showed that TNF-α, p53, EMT, and SYDECAN1 signaling were among the highly affected pathways in AF samples. SDC-1 (SYNDECAN-1) was the top-enriched gene in p53, EMT, and SYDECAN1 signaling. Consistently, SDC-1 mRNA and protein levels were significantly higher in atrial samples of AF patients. Among negatively correlated miRs, miR-302b-3p was experimentally validated to suppress SDC-1 transcript levels. Overall, our results suggested that the miR-302b-3p/SDC-1 axis may be involved in the pathogenesis of AF.
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Mun D, Kim H, Kang JY, Yun N, Youn YN, Joung B. Small extracellular vesicles derived from patients with persistent atrial fibrillation exacerbate arrhythmogenesis via miR-30a-5p. Clin Sci (Lond) 2022:CS20211141. [PMID: 35411927 DOI: 10.1042/CS20211141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/21/2022] [Accepted: 04/11/2022] [Indexed: 11/17/2022]
Abstract
Small extracellular vesicles (sEVs) are nanometer-sized membranous vesicles that contribute to the pathogenesis of atrial fibrillation (AF). Here, we investigated the role of sEVs derived from patients with persistent AF in the pathophysiology of AF. First, we evaluated the pathological effects of sEVs derived from the peripheral blood of patients with persistent AF (AF-sEVs). AF-sEVs treatment reduced cell viability, caused abnormal Ca2+ handling, induced reactive oxygen species (ROS) production, and led to increased CaMKII activation of non-paced and paced atrial cardiomyocytes. Next, we analyzed the miRNA profile of AF-sEVs to investigate which components of AF-sEVs promote arrhythmias, and we selected six miRNAs that correlated with CaMKII activation. qRT-PCR experiment identified that miR-30a-5p was significantly downregulated in AF-sEVs, paced cardiomyocytes, and atrial tissues of patients with persistent AF. CaMKII was predicted by bioinformatics analysis as a miR-30a-5p target gene and validated by a dual luciferase reporter; hence, we evaluated the effects of miR-30a-5p on paced cardiomyocytes and validated miR-30a-5p as a pro-arrhythmic signature of AF-sEVs. Consequently, AF-sEVs-loaded with miR-30a-5p attenuated pacing-induced Ca2+-handling abnormalities, whereas AF-sEVs-loaded with anti-miR-30a-5p reversed the change in paced cardiomyocytes. Taken together, the regulation of CaMKII by miR-30a-5p revealed that miR-30a-5p is a major mediator for AF-sEVs-mediated AF pathogenesis. Accordingly, these findings suggest that sEVs derived from patients with persistent AF exacerbate arrhythmogenesis via miR-30a-5p.
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Yang CH, Liu HT, Lee HL, Lin FC, Chou CC. Left atrial booster-pump function as a predictive parameter for atrial fibrillation in patients with severely dilated left atrium. Quant Imaging Med Surg 2022; 12:2523-2534. [PMID: 35371928 PMCID: PMC8923837 DOI: 10.21037/qims-21-954] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 01/12/2022] [Indexed: 03/22/2024]
Abstract
BACKGROUND Left atrial (LA) dimension ≥50 mm had approximately four times the risk of developing atrial fibrillation (AF). The aim of this study was to investigate whether the application of clinical and echocardiographic parameters could differentiate between the patients having severely dilated left atrium with and without AF. METHODS This retrospective cross-sectional study enrolled consecutive patients with LA dimension ≥50 mm and divided them into three groups: no AF (no-AF), paroxysmal AF (PAF) and non-paroxysmal AF (non-PAF) groups. For PAF and non-PAF groups, all patients underwent radiofrequency ablation, and the echocardiographic parameters were obtained on the next day after ablation. RESULTS Our study population comprised 160 patients, including 80, 53, and 27 patients in the non-AF, PAF and non-PAF groups, respectively. The no-AF group had a significantly higher body mass index (kg/m2) (29.31±6.27, 27.58±4.12 and 26.57±2.81, P=0.01), and a higher prevalence of diabetes mellitus (DM) [31 (38.80%), 13 (25.00%) and 4 (14.80%), P=0.01] and hypertension [67 (83.80%), 34 (65.40%), and 19 (70.40%), P=0.04], but a lower prevalence of rheumatic heart disease (RHD) [3 (3.80%), 6 (11.50%) and 5 (18.50%), P=0.02] and sick sinus syndrome [0 (0.00%), 6 (11.50%) and 4 (14.80%), P=0.045]. Echocardiographic studies showed that the non-AF group had significantly smaller LA minimal volume index (24.89±9.74, 34.06±19.38 and 42.83±17.44 mL/m2, P<0.01), higher LA emptying fraction (51.99%±13.97%, 38.40%±15.96% and 33.89%±10.73%, P<0.01), longitudinal strain (23.87%±7.72%, 17.11%±8.52% and 12.38%±4.28%, P<0.01) and strain rate than the AF groups. The multivariate analysis showed that the late diastolic component of LA strain rate was the only independent factor associated with the presence of AF (odds ratio, 21.69; 95% CI, 9.77-48.13, P<0.01). CONCLUSIONS LA function plays an important role in the absence of AF in patients with LA dimension ≥50 mm; the late diastolic component of LA strain rate was the only independent variable on multivariate analysis.
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Affiliation(s)
- Chia-Hung Yang
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan
- Department of Internal Medicine, New Taipei Municipal TuCheng Hospital, New Taipei
| | - Hao-Tien Liu
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan
| | - Hui-Ling Lee
- Department of Anesthesia, Chang Gung Memorial Hospital, Taipei Branch, Taipei
| | - Fen-Chiung Lin
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan
| | - Chung-Chuan Chou
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan
- Chang Gung University College of Medicine, Taoyuan
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Ionescu RF, Enache RM, Cretoiu SM, Cretoiu D. The Interplay Between Gut Microbiota and miRNAs in Cardiovascular Diseases. Front Cardiovasc Med 2022; 9:856901. [PMID: 35369298 PMCID: PMC8965857 DOI: 10.3389/fcvm.2022.856901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 02/16/2022] [Indexed: 11/16/2022] Open
Abstract
The human microbiota contains microorganisms found on the skin, mucosal surfaces and in other tissues. The major component, the gut microbiota, can be influenced by diet, genetics, and environmental factors. Any change in its composition results in pathophysiological changes that can further influence the evolution of different conditions, including cardiovascular diseases (CVDs). The microbiome is a complex ecosystem and can be considered the metagenome of the microbiota. MicroRNAs (miRNAs) are speculated to interact with the intestinal microbiota for modulating gene expressions of the host. miRNAs represent a category of small non-coding RNAs, consisting of approximately 22 nucleotides, which can regulate gene expression at post-transcriptional level, by influencing the degradation of mRNA and modifying protein amounts. miRNAs display a multitude of roles, being able to influence the pathogenesis and progression of various diseases. Circulating miRNAs are stable against degradation, due to their enclosure into extracellular vesicles (EVs). This review aims to assess the current knowledge of the possible interactions between gut microbiota, miRNAs, and CVDs. As more scientific research is conducted, it can be speculated that personalized patient care in the future may include the management of gut microbiota composition and the targeted treatment against certain expression of miRNAs.
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Affiliation(s)
| | - Robert Mihai Enache
- Department of Radiology and Medical Imaging, Fundeni Clinical Institute, Bucharest, Romania
| | - Sanda Maria Cretoiu
- Department of Morphological Sciences, Cell and Molecular Biology and Histology, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- *Correspondence: Sanda Maria Cretoiu ;
| | - Dragos Cretoiu
- Department of Morphological Sciences, Cell and Molecular Biology and Histology, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Fetal Medicine Excellence Research Center, Alessandrescu-Rusescu National Institute for Mother and Child Health, Bucharest, Romania
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Vavassori C, Cipriani E, Colombo GI. Circulating MicroRNAs as Novel Biomarkers in Risk Assessment and Prognosis of Coronary Artery Disease. Eur Cardiol 2022; 17:e06. [PMID: 35321524 PMCID: PMC8924954 DOI: 10.15420/ecr.2021.47] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/05/2022] [Indexed: 12/14/2022] Open
Abstract
Coronary artery disease is among the leading causes of death worldwide. Nevertheless, available cardiovascular risk prediction algorithms still miss a significant portion of individuals at-risk. Thus, the search for novel non-invasive biomarkers to refine cardiovascular risk assessment is both an urgent need and an attractive topic, which may lead to a more accurate risk stratification and/or prognostic score definition for coronary artery disease. A new class of such non-invasive biomarkers is represented by extracellular microRNAs (miRNAs) circulating in the blood. MiRNAs are non-coding RNA of 22–25 nucleotides in length that play a significant role in both cardiovascular physiology and pathophysiology. Given their high stability and conservation, resistance to degradative enzymes, and detectability in body fluids, circulating miRNAs are promising emerging biomarkers, and specific expression patterns have already been associated with a wide range of cardiovascular conditions. In this review, an overview of the role of blood miRNAs in risk assessment and prognosis of coronary artery disease is given.
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Affiliation(s)
- Chiara Vavassori
- Unit of Immunology and Functional Genomics, Centro Cardiologico Monzino, IRCCS, Milan, Italy; Cardiovascular Section, Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Eleonora Cipriani
- Unit of Immunology and Functional Genomics, Centro Cardiologico Monzino, IRCCS, Milan, Italy
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Abstract
The initial identification of long non-coding RNA myocardial infarction associated transcript (MIAT) as a genetic risk factor of myocardial infarction has made this lncRNA (designated as lncR-MIAT here) a focus of intensive studies worldwide. Emerging evidence supports that lncR-MIAT is susceptible in its expression to multiple deleterious factors like angiotensin II, isoproterenol, hypoxia, and infection and is anomaly overexpressed in serum, plasma, blood cells and myocardial tissues under a variety of cardiovascular conditions including myocardial infarction, cardiac hypertrophy, diabetic cardiomyopathy, dilated cardiomyopathy, sepsis cardiomyopathy, atrial fibrillation and microvascular dysfunction. Experimental results consistently demonstrated that upregulation of lncR-MIAT plays active roles in the pathological processes of the cardiovascular system and knockdown of this lncRNA effectively ameliorates the adverse conditions. The available data revealed that lncR-MIAT acts through multiple mechanisms such as competitive endogenous RNA, natural antisense RNA and RNA/protein interactions. Moreover, the functional domains of lncR-MIAT accounting for certain specific cellular functions of the full-length transcript have been identified and characterized. These insights will not only tremendously advance our understanding of lncRNA biology and pathophysiology, but also offer good opportunities for more innovative and precise design of agents that have the potential to be developed into new drugs for better therapy of cardiovascular diseases (CVDs) in the future. Herein, we provide an overview of lncR-MIAT, focusing on its roles in cardiovascular diseases, underline the unique cellular/molecular mechanisms for its actions, and speculate the perspectives about the translational studies on the potential diagnostic and therapeutic applications of lncR-MIAT.
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Affiliation(s)
- Chao Yang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang, 150081, People's Republic of China.,Department of Biochemistry, Qiqihar Medical University, Qiqihar, 161000, Heilongjiang, People's Republic of China
| | - Yong Zhang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang, 150081, People's Republic of China.,Institute of Metabolic Disease, Heilongjiang Academy of Medical Science, Harbin, 150086, People's Republic of China
| | - Baofeng Yang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, 157 Baojian Road, Nangang District, Harbin, Heilongjiang, 150081, People's Republic of China.
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Abstract
Around the world there are 33.5 million patients suffering from atrial fibrillation (AF) with an annual increase of 5 million cases. Most AF patients have an established form of an atrial cardiomyopathy. The concept of atrial cardiomyopathy was introduced in 2016. Thus, therapy of underlying diseases and atrial tissue changes appear as a cornerstone of AF therapy. Furthermore, therapy or prevention of atrial endocardial changes has the potential to reduce atrial thrombogenesis and thereby cerebral stroke. The present manuscript will summarize the underlying pathophysiology and remodeling processes observed in the development of an atrial cardiomyopathy, thrombogenesis, and atrial fibrillation. In particular, the impact of oxidative stress, inflammation, diabetes, and obesity will be addressed.
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Affiliation(s)
- Andreas Goette
- Department of Cardiology and Intensive Care Medicine, St. Vincenz Hospital, 33098 Paderborn, Germany
- MAESTRIA Consortium/AFNET, 48149 Münster, Germany
- Correspondence:
| | - Uwe Lendeckel
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, 17475 Greifswald, Germany;
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Jost N, Christ T, Magyar J. New Strategies for the Treatment of Atrial Fibrillation. Pharmaceuticals (Basel) 2021; 14:ph14090926. [PMID: 34577626 PMCID: PMC8466466 DOI: 10.3390/ph14090926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 12/19/2022] Open
Abstract
Atrial fibrillation (AF) is the most prevalent cardiac arrhythmia in the clinical practice. It significantly contributes to the morbidity and mortality of the elderly population. Over the past 25-30 years intense effort in basic research has advanced the understanding of the relationship between the pathophysiology of AF and atrial remodelling. Nowadays it is clear that the various forms of atrial remodelling (electrical, contractile and structural) play crucial role in initiating and maintaining the persistent and permanent types of AF. Unlike in ventricular fibrillation, in AF rapid ectopic firing originating from pulmonary veins and re-entry mechanism may induce and maintain (due to atrial remodelling) this complex cardiac arrhythmia. The present review presents and discusses in detail the latest knowledge on the role of remodelling in AF. Special attention is paid to novel concepts and pharmacological targets presumably relevant to the drug treatment of atrial fibrillation.
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Affiliation(s)
- Norbert Jost
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, 6725 Szeged, Hungary
- Department of Pharmacology and Pharmacotherapy, Interdisciplinary Excellence Centre, University of Szeged, 6725 Szeged, Hungary
- ELKH-SZTE Research Group for Cardiovascular Pharmacology, Eötvös Loránd Research Network, 6725 Szeged, Hungary
- Correspondence:
| | - Torsten Christ
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany;
- DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 20246 Hamburg, Germany
| | - János Magyar
- Department of Physiology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary;
- Department of Sport Physiology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
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Xiang K, Akram M, Elbossaty WF, Yang J, Fan C. Exosomes in atrial fibrillation: therapeutic potential and role as clinical biomarkers. Heart Fail Rev 2021; 27:1211-1221. [PMID: 34251579 DOI: 10.1007/s10741-021-10142-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/05/2021] [Indexed: 12/21/2022]
Abstract
Atrial fibrillation (AF), the most common cardiac arrhythmia, is a global epidemic. AF can cause heart failure and myocardial infarction and increase the risk of stroke, disability, and thromboembolic events. AF is becoming increasingly ubiquitous and is associated with increased morbidity and mortality at higher ages, resulting in an increasing threat to human health as well as substantial medical and social costs. Currently, treatment strategies for AF focus on controlling heart rate and rhythm with medications to restore and maintain sinus rhythm, but this approach has limitations. Catheter ablation is not entirely satisfactory and does not address the issues underlying AF. Research exploring the mechanisms causing AF is urgently needed for improved prevention, diagnosis, and treatment of AF. Exosomes are small vesicles (30-150 nm) released by cells that transmit information between cells. MicroRNAs in exosomes play an important role in the pathogenesis of AF and are established as a biomarker for AF. In this review, a summary of the role of exosomes in AF is presented. The role of exosomes and microRNAs in AF occurrence, their therapeutic potential, and their potential role as clinical biomarkers is considered. A better understanding of exosomes has the potential to improve the prognosis of AF patients worldwide, reducing the global medical burden of this disease.
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Affiliation(s)
- Kun Xiang
- Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Middle Renmin Road 139, Changsha, 410011, China
| | - Muhammad Akram
- Department of Eastern Medicine, Government College University Faisalabad, Faisalabad, Pakistan
| | | | - Jinfu Yang
- Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Middle Renmin Road 139, Changsha, 410011, China
| | - Chengming Fan
- Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Middle Renmin Road 139, Changsha, 410011, China.
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Szilágyi J, Sághy L. Atrial Remodeling in Atrial Fibrillation. Comorbidities and Markers of Disease Progression Predict Catheter Ablation Outcome. Curr Cardiol Rev 2021; 17:217-229. [PMID: 32693769 PMCID: PMC8226201 DOI: 10.2174/1573403x16666200721153620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/29/2020] [Accepted: 06/01/2020] [Indexed: 01/19/2023] Open
Abstract
Atrial fibrillation is the most common supraventricular arrhythmia affecting an increasing proportion of the population in which mainstream therapy, i.e. catheter ablation, provides freedom from arrhythmia in only a limited number of patients. Understanding the mechanism is key in order to find more effective therapies and to improve patient selection. In this review, the structural and electrophysiological changes of the atrial musculature that constitute atrial remodeling in atrial fibrillaton and how risk factors and markers of disease progression can predict catheter ablation outcome will be discussed in detail.
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Affiliation(s)
- Judit Szilágyi
- 2nd Department of Internal Medicine and Cardiology Centre, University of Szeged, Szeged, Hungary
| | - László Sághy
- 2nd Department of Internal Medicine and Cardiology Centre, University of Szeged, Szeged, Hungary
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Gao Y, Liu Y, Fu Y, Wang Q, Liu Z, Hu R, Yang X, Chen M. The potential regulatory role of hsa_circ_0004104 in the persistency of atrial fibrillation by promoting cardiac fibrosis via TGF-β pathway. BMC Cardiovasc Disord 2021; 21:25. [PMID: 33421993 PMCID: PMC7797150 DOI: 10.1186/s12872-021-01847-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 01/01/2021] [Indexed: 12/26/2022] Open
Abstract
INTRODUCTION The progression of paroxysmal AF (PAF) to persistent AF (PsAF) worsens the prognosis of AF, but its underlying mechanisms remain elusive. Recently, circular RNAs (circRNAs) were reported to be associated with cardiac fibrosis. In case of the vital role of cardiac fibrosis in AF persistency, we hypothesis that circRNAs may be potential regulators in the process of AF progression. MATERIALS AND METHODS 6 persistent and 6 paroxysmal AF patients were enrolled as derivation cohort. Plasma circRNAs expressions were determined by microarray and validated by RT-PCR. Fibrosis level, manifested by serum TGF-β, was determined by ELISA. Pathways and related non-coding RNAs involving in the progression of AF regulated were predicted by in silico analysis. RESULTS PsAF patients showed a distinct circRNAs expression profile with 92 circRNAs significantly dysregulated (fold change ≥ 2, p < 0.05), compared with PAF patients. The validity of the expression patterns was subsequently validated by RT-PCR in another 60 AF patients (30 PsAF and PAF, respectively). In addition, all the 5 up and down regulated circRNAs were clustered in MAPK and TGF-beta signaling pathway by KEGG pathway analysis. Among the 5 circRNAs, hsa_circ_0004104 was consistently downregulated in PsAF group (0.6 ± 0.33 vs 1.46 ± 0.41, p < 0.001) and predicted to target several AF and/or cardiac fibrosis related miRNAs reported by previous studies. In addition, TGF-β1 level was significantly higher in the PsAF group (5560.23 ± 1833.64 vs 2236.66 ± 914.89, p < 0.001), and hsa_circ_0004104 showed a significant negative correlation with TGF-β1 level (r = - 0.797, p < 0.001). CONCLUSION CircRNAs dysregulation plays vital roles in AF persistency. hsa_circ_0004104 could be a potential regulator and biomarker in AF persistency by promoting cardiac fibrosis via targeting MAPK and TGF-beta pathways.
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Affiliation(s)
- Yuanfeng Gao
- Heart Center and Beijing Key Laboratory of Hypertension, Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, 8th Gongtinanlu Rd, Chaoyang District, Beijing, 100020, China
| | - Ye Liu
- Heart Center and Beijing Key Laboratory of Hypertension, Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, 8th Gongtinanlu Rd, Chaoyang District, Beijing, 100020, China
| | - Yuan Fu
- Heart Center and Beijing Key Laboratory of Hypertension, Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, 8th Gongtinanlu Rd, Chaoyang District, Beijing, 100020, China
| | - Qianhui Wang
- Heart Center and Beijing Key Laboratory of Hypertension, Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, 8th Gongtinanlu Rd, Chaoyang District, Beijing, 100020, China
| | - Zheng Liu
- Heart Center and Beijing Key Laboratory of Hypertension, Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, 8th Gongtinanlu Rd, Chaoyang District, Beijing, 100020, China
| | - Roumu Hu
- Heart Center and Beijing Key Laboratory of Hypertension, Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, 8th Gongtinanlu Rd, Chaoyang District, Beijing, 100020, China
| | - Xinchun Yang
- Heart Center and Beijing Key Laboratory of Hypertension, Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, 8th Gongtinanlu Rd, Chaoyang District, Beijing, 100020, China
| | - Mulei Chen
- Heart Center and Beijing Key Laboratory of Hypertension, Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, 8th Gongtinanlu Rd, Chaoyang District, Beijing, 100020, China.
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Khan MS, Yamashita K, Sharma V, Ranjan R, Dosdall DJ. RNAs and Gene Expression Predicting Postoperative Atrial Fibrillation in Cardiac Surgery Patients Undergoing Coronary Artery Bypass Grafting. J Clin Med 2020; 9:jcm9041139. [PMID: 32316120 PMCID: PMC7231013 DOI: 10.3390/jcm9041139] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/14/2020] [Accepted: 04/14/2020] [Indexed: 02/07/2023] Open
Abstract
Postoperative atrial fibrillation (POAF) is linked with increased morbidity, mortality rate and financial liability. About 20–50% of patients experience POAF after coronary artery bypass graft (CABG) surgery. Numerous review articles and meta-analyses have investigated links between patient clinical risk factors, demographic conditions, and pre-, peri- and post-operative biomarkers to forecast POAF incidence in CABG patients. This narrative review, for the first time, summarize the role of micro-RNAs, circular-RNAs and other gene expressions that have shown experimental evidence to accurately predict the POAF incidence in cardiac surgery patients after CABG. We envisage that identifying specific genomic markers for predicting POAF might be a significant step for the prevention and effective management of this type of post-operative complication and may provide critical perspective into arrhythmogenic substrate responsible for POAF.
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Affiliation(s)
- Muhammad Shuja Khan
- Nora Eccles Harrison Cardiovascular Research and Training Institute, The University of Utah, Salt Lake City, UT 84112, USA; (M.S.K.); (K.Y.); (R.R.)
| | - Kennosuke Yamashita
- Nora Eccles Harrison Cardiovascular Research and Training Institute, The University of Utah, Salt Lake City, UT 84112, USA; (M.S.K.); (K.Y.); (R.R.)
- Division of Cardiovascular Medicine, The University of Utah-Health, Salt Lake City, UT 84132, USA
| | - Vikas Sharma
- Division of Cardiothoracic Surgery, The University of Utah-Health, Salt Lake City, UT 84132, USA;
| | - Ravi Ranjan
- Nora Eccles Harrison Cardiovascular Research and Training Institute, The University of Utah, Salt Lake City, UT 84112, USA; (M.S.K.); (K.Y.); (R.R.)
- Division of Cardiovascular Medicine, The University of Utah-Health, Salt Lake City, UT 84132, USA
- Department of Biomedical Engineering, The University of Utah, Salt Lake City, UT 84112, USA
| | - Derek James Dosdall
- Nora Eccles Harrison Cardiovascular Research and Training Institute, The University of Utah, Salt Lake City, UT 84112, USA; (M.S.K.); (K.Y.); (R.R.)
- Division of Cardiovascular Medicine, The University of Utah-Health, Salt Lake City, UT 84132, USA
- Division of Cardiothoracic Surgery, The University of Utah-Health, Salt Lake City, UT 84132, USA;
- Department of Biomedical Engineering, The University of Utah, Salt Lake City, UT 84112, USA
- Correspondence: ; Tel.: +1-801-587-2036
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Kiyosawa N, Watanabe K, Morishima Y, Yamashita T, Yagi N, Arita T, Otsuka T, Suzuki S. Exploratory Analysis of Circulating miRNA Signatures in Atrial Fibrillation Patients Determining Potential Biomarkers to Support Decision-Making in Anticoagulation and Catheter Ablation. Int J Mol Sci 2020; 21:ijms21072444. [PMID: 32244749 PMCID: PMC7178177 DOI: 10.3390/ijms21072444] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/27/2020] [Accepted: 03/31/2020] [Indexed: 12/24/2022] Open
Abstract
Novel biomarkers are desired to improve risk management for patients with atrial fibrillation (AF). We measured 179 plasma miRNAs in 83 AF patients using multiplex qRT-PCR. Plasma levels of eight (i.e., hsa-miR-22-3p, hsa-miR-128-3p, hsa-miR-130a-3p, hsa-miR-140-5p, hsa-miR-143-3p, hsa-miR-148b-3p, hsa-miR-497-5p, hsa-miR-652-3p) and three (i.e., hsa-miR-144-5p, hsa-miR-192-5p, hsa-miR-194-5p) miRNAs showed positive and negative correlations with CHA2DS2-VASc scores, respectively, which also showed negative and positive correlations with catheter ablation (CA) procedure, respectively, within the follow-up observation period up to 6-month after enrollment. These 11 miRNAs were functionally associated with TGF-β signaling and androgen signaling based on pathway enrichment analysis. Seven of possible target genes of these miRNAs, namely TGFBR1, PDGFRA, ZEB1, IGFR1, BCL2, MAPK1 and DICER1 were found to be modulated by more than four miRNAs of the eleven. Of them, TGFBR1, PDGFRA, ZEB1 and BCL2 are reported to exert pro-fibrotic functions, suggesting that dysregulations of these eleven miRNAs may reflect pro-fibrotic condition in the high-risk patients. Although highly speculative, these miRNAs may potentially serve as potential biomarkers, providing mechanistic and quantitative information for pathophysiology in daily clinical practice with AF such as possible pro-fibrotic state in left atrium, which would enhance the risk of stroke and reduce the preference for performing CA.
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Affiliation(s)
- Naoki Kiyosawa
- Specialty Medicine Research Laboratories I, Daiichi Sankyo Co., Ltd., Tokyo 140-0005, Japan
- Correspondence: ; Tel.: +81-3-5740-3412
| | - Kenji Watanabe
- Biomarker & Translational Research Department, Daiichi Sankyo Co., Ltd., Tokyo 140-0005, Japan;
| | - Yoshiyuki Morishima
- Medical Science Department, Daiichi Sankyo Co., Ltd., Tokyo 103-8426, Japan;
| | - Takeshi Yamashita
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Tokyo 106-0031, Japan; (T.Y.); (T.A.); (T.O.); (S.S.)
| | - Naoharu Yagi
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Tokyo 106-0031, Japan; (T.Y.); (T.A.); (T.O.); (S.S.)
| | - Takuto Arita
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Tokyo 106-0031, Japan; (T.Y.); (T.A.); (T.O.); (S.S.)
| | - Takayuki Otsuka
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Tokyo 106-0031, Japan; (T.Y.); (T.A.); (T.O.); (S.S.)
| | - Shinya Suzuki
- Department of Cardiovascular Medicine, The Cardiovascular Institute, Tokyo 106-0031, Japan; (T.Y.); (T.A.); (T.O.); (S.S.)
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Regouski M, Galenko O, Doleac J, Olsen AL, Jacobs V, Liechty D, White KL, Bunch TJ, Lee PM, Rutigliano HM, Polejaeva IA, Cutler MJ. Spontaneous Atrial Fibrillation in Transgenic Goats With TGF (Transforming Growth Factor)-β1 Induced Atrial Myopathy With Endurance Exercise. Circ Arrhythm Electrophysiol 2019; 12:e007499. [PMID: 31707807 DOI: 10.1161/circep.119.007499] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND There is increasing evidence that endurance exercise is associated with increased risk of atrial fibrillation (AF). However, it is unknown if the relationship between endurance exercise and AF is dependent on an atrial myopathy. METHODS Six cardiac-specific TGF (transforming growth factor)-β1 transgenic and 6 wild-type (WT) goats were utilized for these studies. Pacemakers were implanted in all animals for continuous arrhythmia monitoring and AF inducibility. AF inducibility was evaluated using 5 separate 10 s bursts of atrial pacing (160-200 ms). Three months of progressive endurance exercise (up to 90 minutes at 4.5 mph) was performed. Quantitative assessment of circulating microRNAs and inflammatory biomarkers was performed. RESULTS Sustained AF (≥30 s) was induced with 10 s of atrial pacing in 4 out of 6 transgenic goats compared with 0 out of 6 WT controls at baseline (P<0.05). No spontaneous AF was observed at baseline. Interestingly, between 2 and 3 months of exercise 3 out of 6 transgenic animals developed self-terminating spontaneous AF compared with 0 out of 6 WT animals (P<0.05). There was an increase in AF inducibility in both transgenic and WT animals during the first 2 months of exercise with partial normalization at 3 months (transgenic 67%; 100%; 83% versus WT 0%; 67%; 17%). These changes in AF susceptibility were associated with a decrease in circulating microRNA-21 and microRNA-29 during the first 2 months of exercise with partial normalization at 3 months in both transgenic and WT animals. Finally, MMP9 (matrix metallopeptidase 9) was increased during the second and third months of exercise training. CONCLUSIONS This study demonstrates a novel transgenic goat model of cardiac fibrosis (TGF-β1 overexpression) to demonstrate that endurance exercise in the setting of an underlying atrial myopathy increases the incidence of spontaneous AF. Furthermore, endurance exercise seems to increase inducible AF secondary to altered expression of key profibrotic biomarkers that is independent of the presence of an atrial myopathy.
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Affiliation(s)
- Misha Regouski
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan (M.R., A.L.O., K.L.W., T.J.B., H.M.R., I.A.P., M.J.C.)
| | - Oxana Galenko
- Intermountain Medical Center Heart Institute, Intermountain Medical Center, Murray, UT (O.G., V.J., T.J.B., M.J.C.)
| | | | - Aaron L Olsen
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan (M.R., A.L.O., K.L.W., T.J.B., H.M.R., I.A.P., M.J.C.)
| | - Victoria Jacobs
- Intermountain Medical Center Heart Institute, Intermountain Medical Center, Murray, UT (O.G., V.J., T.J.B., M.J.C.)
| | - Dustin Liechty
- College of Veterinary Medicine, Washington State University, Pullman, WA (D.L., P.M.L.)
| | - Kenneth L White
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan (M.R., A.L.O., K.L.W., T.J.B., H.M.R., I.A.P., M.J.C.)
| | - T Jared Bunch
- Intermountain Medical Center Heart Institute, Intermountain Medical Center, Murray, UT (O.G., V.J., T.J.B., M.J.C.).,Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan (M.R., A.L.O., K.L.W., T.J.B., H.M.R., I.A.P., M.J.C.).,Department of Internal Medicine, Stanford University, Palo Alto, CA (T.J.B.)
| | - Pamela M Lee
- College of Veterinary Medicine, Washington State University, Pullman, WA (D.L., P.M.L.)
| | - Heloisa M Rutigliano
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan (M.R., A.L.O., K.L.W., T.J.B., H.M.R., I.A.P., M.J.C.)
| | - Irina A Polejaeva
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan (M.R., A.L.O., K.L.W., T.J.B., H.M.R., I.A.P., M.J.C.)
| | - Michael J Cutler
- Intermountain Medical Center Heart Institute, Intermountain Medical Center, Murray, UT (O.G., V.J., T.J.B., M.J.C.).,Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan (M.R., A.L.O., K.L.W., T.J.B., H.M.R., I.A.P., M.J.C.)
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18
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Zhang Y, Du W, Yang B. Long non-coding RNAs as new regulators of cardiac electrophysiology and arrhythmias: Molecular mechanisms, therapeutic implications and challenges. Pharmacol Ther 2019; 203:107389. [DOI: 10.1016/j.pharmthera.2019.06.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 06/27/2019] [Indexed: 12/21/2022]
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19
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Shen NN, Zhang ZL, Li Z, Zhang C, Li H, Wang JL, Wang J, Gu ZC. Identification of microRNA biomarkers in atrial fibrillation: A protocol for systematic review and bioinformatics analysis. Medicine (Baltimore) 2019; 98:e16538. [PMID: 31348272 PMCID: PMC6708903 DOI: 10.1097/md.0000000000016538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Atrial fibrillation (AF) is recognized as the most prevalent arrhythmia, and its subsequently serious complications of heart failure and thromboembolism always raise the social attention. To date, the molecular pathogenesis of AF has largely remained unclear. Publications of contemporary studies have evaluated individual miRNAs expression signatures for AF, and findings of different studies are inconsistent and not all miRNAs reported are actually important in the pathogenesis of AF. METHODS Medline, Embase, and Cochrane Library databases will be comprehensively searched (up to April 30, 2019) for studies identifying miRNA expression profiling in subjects with and without AF. Log10 odds ratios (logORs) and associated 95% confidence interval (95%CI) will be calculated using random-effects models. Subgroup analysis will be performed according to miRNA detecting methods, species, sample types, and ethnicities. Sensitivity analysis will be conducted to detect the robustness of the findings. The methodological quality of studies will be independently assessed using criteria adopted from the Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2). Furthermore, bioinformatics analysis will be performed to identify the potential target genes in AF and the corresponding pathways of dysregulated miRNAs. Two reviewers will independently screen potential studies and extract data in a structured eligibility items, with any disagreements being resolved by consensus. RESULTS The present systematic review will identify potential biomarkers by pooling all differentially expressed miRNAs in AF studies, as well as to predict miRNA-target interactions and to identify the potential biometric functions using bioinformatics analysis. CONCLUSIONS This systematic review and bioinformatics analysis will identify several miRNAs as potential biomarkers for AF, and explore the biological pathways regulated by the eligible miRNAs. PROSPERO REGISTRATION NUMBER CRD42019127594.
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Affiliation(s)
- Nan-Nan Shen
- Department of Pharmacy
- Department of Geriatrics, Affiliated Hospital of Shaoxing University, Shao Xing, Zhejiang Province
- Department of Pharmacy
| | | | - Zheng Li
- Department of Cardiology, Renji Hospital
| | | | - Hao Li
- Department of Pharmacy, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Jia-Liang Wang
- Department of Pharmacy
- Department of Geriatrics, Affiliated Hospital of Shaoxing University, Shao Xing, Zhejiang Province
| | - Jun Wang
- Department of Pharmacy
- Department of Geriatrics, Affiliated Hospital of Shaoxing University, Shao Xing, Zhejiang Province
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Oikonomou E, Zografos T, Papamikroulis GA, Siasos G, Vogiatzi G, Theofilis P, Briasoulis A, Papaioannou S, Vavuranakis M, Gennimata V, Tousoulis D. Biomarkers in Atrial Fibrillation and Heart Failure. Curr Med Chem 2019; 26:873-887. [PMID: 28875838 DOI: 10.2174/0929867324666170830100424] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/25/2016] [Accepted: 11/11/2016] [Indexed: 02/07/2023]
Abstract
Atrial fibrillation (AF) is the most common sustained arrhythmia encountered in clinical practice and an important contributor to cardiovascular morbidity and mortality. Although the exact mechanisms behind AF are not completely elucidated, the underlying pathophysiological changes have been well described. Predisposal factors for AF include the older age, the increased left atrial size, the decreased left atrial function, the presence of heart failure and left ventricular systolic dysfunction and the presence of coronary heart disease or pulmonary or mitral valve disease. In addition to these factors, emerging evidence demonstrate that myocardial strain, fibrosis and inflammation, are associated with AF as well as the pathogenesis of the arrhythmia. The natruretic peptide system including Atrial Natriuretic Peptide (ANP), Brain Natriuretic Peptide (BNP) and C-type Natriuretic Peptide (CNP) is indicative of the level of myocardial strain which may predispose to AF. As a result, the aforementioned peptides are increased in AF patients. The levels of myocardial fibrosis biomarkers, such as ST2 and Galectin-3, are elevated suggesting atrial structural abnormalities, while the increased levels of CRP and Interleukin-6 supplement the inflammatory profile of AF patients. Emerging data for the aforementioned biomarkers are discussed in the present review.
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Affiliation(s)
- Evangelos Oikonomou
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | - Theodoros Zografos
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | | | - Gerasimos Siasos
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | - Georgia Vogiatzi
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | - Panagiotis Theofilis
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | - Alexandros Briasoulis
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | - Spyridon Papaioannou
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | - Manolis Vavuranakis
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | - Vasiliki Gennimata
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
| | - Dimitris Tousoulis
- 1st Department of Cardiology, 'Hippokration' Hospital, University of Athens Medical School, Athens, Greece
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Abstract
Acute myocardial infarction (AMI) and heart failure (HF) are two major causes of cardiovascular mortality and morbidity. Early diagnosis of these conditions is essential to instigate immediate treatment that may result in improved outcomes. Traditional biomarkers of AMI include cardiac troponins and other proteins released from the injured myocardium but there are a number of limitations with these biomarkers especially with regard to specificity. In the past few years circulating nucleic acids, notably microRNA that are small non-coding RNAs that regulate various cellular processes, have been investigated as biomarkers of disease offering improved sensitivity and specificity in the diagnosis and prognostication of various conditions. In this review, the role of microRNAs as biomarkers used in the diagnosis of AMI and HF is discussed, their advantage over traditional biomarkers is outlined and the potential for their implementation in clinical practice is critically assessed.
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Affiliation(s)
- En C Fung
- Department of Laboratory Services, Raja Isteri Pengiran Anak Saleha (RIPAS) Hospital, Bandar Seri Begawan, Brunei Darussalam
| | - Asif N Butt
- Department of Clinical Biochemistry, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Jarlath Eastwood
- Aberdeen Royal Infirmary, NHS Grampian, Aberdeen, United Kingdom
| | - Ramasamyiyer Swaminathan
- Department of Clinical Biochemistry, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Ravinder Sodi
- Department of Blood Sciences, University Hospitals of Morecambe Bay NHS Foundation Trust, Lancaster, United Kingdom; Lancaster Medical School, Lancaster University, Lancaster, United Kingdom.
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Ioannou A, Papageorgiou N, Falconer D, Rehal O, Sewart E, Zacharia E, Toutouzas K, Vlachopoulos C, Siasos G, Tsioufis C, Tousoulis D. Biomarkers Associated with Stroke Risk in Atrial Fibrillation. Curr Med Chem 2019; 26:803-823. [DOI: 10.2174/0929867324666170718120651] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 12/08/2016] [Accepted: 12/16/2016] [Indexed: 11/22/2022]
Abstract
Background:Atrial fibrillation (AF) is associated with an increased risk of cardioembolic stroke. The risk of cardioembolism is not adequately reduced with the administration of oral anticoagulants, since a number of patients continue to experience thromboembolic events despite receiving treatment. Therefore, identification of a circulating biomarker to identify these high-risk patients would be clinically beneficial.Objective:In the present article, we aim to review the available data regarding use of biomarkers to predict cardioembolic stroke in patients with AF.Methods:We performed a thorough search of the literature in order to analyze the biomarkers identified thus far and critically evaluate their clinical significance.Results:A number of biomarkers have been proposed to predict cardioembolic stroke in patients with AF. Some of them are already used in the clinical practice, such as d-dimers, troponins and brain natriuretic peptide. Novel biomarkers, such as the inflammatory growth differentiation factor-15, appear to be promising, while the role of micro-RNAs and genetics appear to be useful as well. Even though these biomarkers are associated with an increased risk for thromboembolism, they cannot accurately predict future events. In light of this, the use of a scoring system, that would incorporate both circulating biomarkers and clinical factors, might be more useful.Conclusions:Recent research has disclosed several biomarkers as potential predictors of cardioembolic stroke in patients with AF. However, further research is required to establish a multifactorial scoring system that will identify patients at high-risk of thromboembolism, who would benefit from more intensive treatment and monitoring.
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Affiliation(s)
| | | | | | - Onkar Rehal
- University College London Hospital, London, United Kingdom
| | - Emma Sewart
- University College London Medical School, London, United Kingdom
| | - Effimia Zacharia
- 1st Cardiology Department, Athens University Medical School, Hippokration Hospital, Athens, Greece
| | - Konstantinos Toutouzas
- 1st Cardiology Department, Athens University Medical School, Hippokration Hospital, Athens, Greece
| | - Charalambos Vlachopoulos
- 1st Cardiology Department, Athens University Medical School, Hippokration Hospital, Athens, Greece
| | - Gerasimos Siasos
- 1st Cardiology Department, Athens University Medical School, Hippokration Hospital, Athens, Greece
| | - Costas Tsioufis
- 1st Cardiology Department, Athens University Medical School, Hippokration Hospital, Athens, Greece
| | - Dimitris Tousoulis
- 1st Cardiology Department, Athens University Medical School, Hippokration Hospital, Athens, Greece
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Mun D, Kim H, Kang J, Park H, Park H, Lee S, Yun N, Joung B. Expression of miRNAs in circulating exosomes derived from patients with persistent atrial fibrillation. FASEB J 2019; 33:5979-5989. [DOI: 10.1096/fj.201801758r] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Dasom Mun
- Division of CardiologyYonsei University College of Medicine Seoul South Korea
| | - Hyoeun Kim
- Division of CardiologyYonsei University College of Medicine Seoul South Korea
| | - Ji‐Young Kang
- Division of CardiologyYonsei University College of Medicine Seoul South Korea
| | - Hyelim Park
- Division of CardiologyYonsei University College of Medicine Seoul South Korea
| | - Hyewon Park
- Division of CardiologyYonsei University College of Medicine Seoul South Korea
| | - Seung‐Hyun Lee
- Department of Biochemistry and Molecular BiologyYonsei University College of Medicine Seoul South Korea
| | - Nuri Yun
- Institute of Life Science and BiotechnologyYonsei University Seoul South Korea
| | - Boyoung Joung
- Division of CardiologyYonsei University College of Medicine Seoul South Korea
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Galenko O, Jacobs V, Knight S, Taylor M, Cutler MJ, Muhlestein JB, Carlquist JL, Knowlton KU, Jared Bunch T. The role of microRNAs in the development, regulation, and treatment of atrial fibrillation. J Interv Card Electrophysiol 2019; 55:297-305. [PMID: 30607665 DOI: 10.1007/s10840-018-0495-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 12/09/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND MicroRNAs (miRNA)s regulate expression of genes involved in various processes including cardiac automaticity, conduction, excitability, and fibrosis and therefore may provide a diagnostic utility to identify high-risk patients for atrial fibrillation (AF). In this study, we tested the hypothesis that specific profiles of circulating miRNAs can identify patients with AF and can also help to identify patients at high risk of AF recurrence after ablation. METHODS Two patient populations were studied: 140 AF cases (93 paroxysmal and 47 persistent) and 50 healthy controls, and 141 AF ablation cases with (n = 86) and without (n = 55) 1-year recurrence. Assessment of several previously identified AF-associated plasma miRNAs (21, 29a, 133a, 133b, 150, 328) was performed with TaqMan assays, using synthetic miRNAs as standards. RESULTS The AF cases compared to the healthy controls were older and were more often male and hypertensive. After multivariate adjustment, higher miRNA-21 levels significantly decreased the risk of AF (OR = 0.93 per fmol/μl (95% CI = 0.89-0.98, p = 0.007)). There were no significant differences in circulating miRNAs between the AF subtypes of persistent and paroxysmal. Among the AF ablation cases, miRNA-150 was lower for those with AF recurrences at 1 year (adjusted OR = 0.98 per 500,000 fmol/μl; 95% CI = 0.965, 0.998; p = 0.039). CONCLUSIONS Decreased circulating miRNA-21 is associated with AF, but not with AF subtypes, suggestive that molecular mechanisms responsible for the onset and progression of the AF may be different. Circulating miRNA-150 was significantly associated with a reduction in 1-year AF recurrence post ablation suggestive of adverse structural and electrical remodeling as recurrence mechanisms.
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Affiliation(s)
- Oxana Galenko
- Intermountain Medical Center Heart Institute, Murray, UT, USA
| | - Victoria Jacobs
- Intermountain Medical Center Heart Institute, Murray, UT, USA
| | - Stacey Knight
- Intermountain Medical Center Heart Institute, Murray, UT, USA.,Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | - Madisyn Taylor
- Intermountain Medical Center Heart Institute, Murray, UT, USA
| | | | - Joseph B Muhlestein
- Intermountain Medical Center Heart Institute, Murray, UT, USA.,Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | | | - Kirk U Knowlton
- Intermountain Medical Center Heart Institute, Murray, UT, USA.,Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | - T Jared Bunch
- Intermountain Medical Center Heart Institute, Murray, UT, USA. .,Department of Internal Medicine, Stanford University, Palo Alto, CA, USA. .,Intermountain Medical Center Heart Institute, Intermountain Medical Center, 5169 Cottonwood St, Salt Lake City, UT, 84107, USA.
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25
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Shangguan W, Liang X, Shi W, Liu T, Wang M, Li G. Identification and characterization of circular RNAs in rapid atrial pacing dog atrial tissue. Biochem Biophys Res Commun 2018; 506:1-6. [PMID: 29772236 DOI: 10.1016/j.bbrc.2018.05.082] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 05/13/2018] [Indexed: 12/11/2022]
Abstract
Circular RNAs (circRNAs) have emerged as novel molecules of interest in gene regulation as other noncoding RNAs, and participating in the process of many diseases. However, the expression and functions of circRNAs in Rapid atrial pacing (RAP) dog atrial tissue still unknown. 12 canines were randomly assigned to control and pacing group. RAP at 500 beats per minute was maintained 14 days in the pacing group. The expression characterization of circRNAs were revealed by high-throughput sequencing. We totally predicted 15,990 circRNAs in dog atrial tissues. Moreover, we found 146 differentially expressed circRNAs between control and RAP dogs. Five circRNAs were selected for subsequent RT-PCR validation, and four circRNAs confirmed with the high throughput sequencing analysis. GO analysis showed that the differentially expressed circRNAs might involve in the process of "structural constituent of cytoskeleton, ion channel activity". We explored the circRNA-miRNA interaction network, and found extensive interaction among differentially expressed circRNAs and AF related miRNAs and mRNAs. Our work firstly identified the characterization of circRNAs in the dog atrial, and revealed the differentially expressed circRNAs in the RAP dog, this might lay a solid foundation on the function of circRNA in the mechanisms of AF.
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Affiliation(s)
- Wenfeng Shangguan
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, 300211, People's Republic of China
| | - Xue Liang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, 300211, People's Republic of China
| | - Wen Shi
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, 300211, People's Republic of China
| | - 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, 300211, People's Republic of China
| | - Manman 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, 300211, People's Republic of China
| | - 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, 300211, People's Republic of China.
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Hajalirezay Yazdi S, Paryan M, Mohammadi-Yeganeh S. An integrated approach of bioinformatic prediction and in vitro analysis identified that miR-34a targets MET and AXL in triple-negative breast cancer. Cell Mol Biol Lett 2018; 23:51. [PMID: 30386383 PMCID: PMC6201502 DOI: 10.1186/s11658-018-0116-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/11/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Breast cancer is the most prevalent cancer among women, and AXL and MET are the key genes in the PI3K/AKT/mTOR pathway as critical elements in proliferation and invasion of cancer cells. MicroRNAs (miRNAs) are small non-coding RNAs regulating the expression of genes. METHODS Bioinformatic approaches were used to find a miRNA that simultaneously targets both AXL and MET 3'-UTRs. The expression of target miRNA was evaluated in triple-negative (MDA-MB-231) and HER2-overexpressing (SK-BR-3) breast cancer cell lines as well as normal breast cells, MCF-10A, using quantitative real-time PCR. Then, the miRNA was overexpressed in normal and cancer cell lines using a lentiviral vector system. Afterwards, effects of overexpressed miRNA on the expression of AXL and MET genes were evaluated using quantitative real-time PCR. RESULTS By applying bioinformatic software and programs, miRNAs that target the 3'-UTR of both AXL and MET mRNAs were determined, and according to the scores, miR-34a was selected for further analyses. The expression level of miR-34a in MDA-MB-231 and SK-BR-3 was lower than that of MCF-10A. Furthermore, AXL and MET expression in SK-BR-3 and MDA-MB-231 was lower and higher, respectively, than that of MCF-10A. After miR-34a overexpression, MET and AXL were downregulated in MDA-MB-231. In addition, MET was downregulated in SK-BR-3, while AXL was upregulated in this cell line. CONCLUSIONS These findings may indicate that miR-34a is an oncogenic miRNA, downregulated in the distinct breast cancer subtypes. It also targets MET and AXL 3'-UTRs in triple-negative breast cancer. Therefore, it can be considered as a therapeutic target in this type of breast cancer.
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Affiliation(s)
- Shadan Hajalirezay Yazdi
- 0000 0001 0706 2472grid.411463.5Department of Cellular and Molecular Biology, Faculty of Advanced Sciences & Technology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Mahdi Paryan
- 0000 0000 9562 2611grid.420169.8Department of Research and Development, Production and Research Complex, Pasteur Institute of Iran, Tehran, Iran
| | - Samira Mohammadi-Yeganeh
- grid.411600.2Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran ,grid.411600.2Department of Biotechnology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran ,grid.411600.2Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Doñate Puertas R, Jalabert A, Meugnier E, Euthine V, Chevalier P, Rome S. Analysis of the microRNA signature in left atrium from patients with valvular heart disease reveals their implications in atrial fibrillation. PLoS One 2018; 13:e0196666. [PMID: 29723239 PMCID: PMC5933750 DOI: 10.1371/journal.pone.0196666] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 04/17/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Among the potential factors which may contribute to the development and perpetuation of atrial fibrillation, dysregulation of miRNAs has been suggested. Thus in this study, we have quantified the basal expressions of 662 mature human miRNAs in left atrium (LA) from patients undergoing cardiac surgery for valve repair, suffering or not from atrial fibrillation (AF) by using TaqMan® Low Density arrays (v2.0). RESULTS Among the 299 miRNAs expressed in all patients, 42 miRNAs had altered basal expressions in patients with AF. Binding-site predictions with Targetscan (conserved sites among species) indicated that the up- and down-regulated miRNAs controlled respectively 3,310 and 5,868 genes. To identify the most relevant cellular functions under the control of the altered miRNAs, we focused on the 100 most targeted genes of each list and identified 5 functional protein-protein networks among these genes. Up-regulated networks were involved in synchronisation of circadian rythmicity and in the control of the AKT/PKC signaling pathway (i.e., proliferation/adhesion). Down-regulated networks were the IGF-1 pathway and TGF-beta signaling pathway and a network involved in RNA-mediated gene silencing, suggesting for the first time that alteration of miRNAs in AF would also perturbate the whole miRNA machinery. Then we crossed the list of miRNA predicted genes, and the list of mRNAs altered in similar patients suffering from AF and we found that respectively 44.5% and 55% of the up- and down-regulated mRNA are predicted to be conserved targets of the altered miRNAs (at least one binding site in 3'-UTR). As they were involved in the same biological processes mentioned above, these data demonstrated that a great part of the transcriptional defects previously published in LA from AF patients are likely due to defects at the post-transcriptional level and involved the miRNAs. CONCLUSIONS Our stringent analysis permitted us to identify highly targeted protein-protein networks under the control of miRNAs in LA and, among them, to highlight those specifically affected in AF patients with altered miRNA signature. Further studies are now required to determine whether alterations of miRNA levels in AF pathology are causal or represent an adaptation to prevent cardiac electrical and structural remodeling.
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Affiliation(s)
- Rosa Doñate Puertas
- Institut NeuroMyoGene (INMG), UMR CNRS 5310-INSERM U1217 / University of Lyon, Lyon, France
| | - Audrey Jalabert
- CarMeN Laboratory (UMR INSERM 1060-INRA 1397, INSA), Lyon-Sud Faculty of Medicine, University of Lyon, Pierre-Bénite, France
| | - Emmanuelle Meugnier
- CarMeN Laboratory (UMR INSERM 1060-INRA 1397, INSA), Lyon-Sud Faculty of Medicine, University of Lyon, Pierre-Bénite, France
| | - Vanessa Euthine
- CarMeN Laboratory (UMR INSERM 1060-INRA 1397, INSA), Lyon-Sud Faculty of Medicine, University of Lyon, Pierre-Bénite, France
| | - Philippe Chevalier
- Institut NeuroMyoGene (INMG), UMR CNRS 5310-INSERM U1217 / University of Lyon, Lyon, France
- Rhythmology Unit, Louis Pradel Cardiology Hospital, Hospices Civils de Lyon, Bron, France
- * E-mail: (SR); (PC)
| | - Sophie Rome
- CarMeN Laboratory (UMR INSERM 1060-INRA 1397, INSA), Lyon-Sud Faculty of Medicine, University of Lyon, Pierre-Bénite, France
- * E-mail: (SR); (PC)
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Jung S, Bohan A. Genome-wide sequencing and quantification of circulating microRNAs for dogs with congestive heart failure secondary to myxomatous mitral valve degeneration. Am J Vet Res 2018; 79:163-169. [PMID: 29359980 DOI: 10.2460/ajvr.79.2.163] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To characterize expression profiles of circulating microRNAs via genome-wide sequencing for dogs with congestive heart failure (CHF) secondary to myxomatous mitral valve degeneration (MMVD). ANIMALS 9 healthy client-owned dogs and 8 age-matched client-owned dogs with CHF secondary to MMVD. PROCEDURES Blood samples were collected before administering cardiac medications for the management of CHF. Isolated microRNAs from plasma were classified into microRNA libraries and subjected to next-generation sequencing (NGS) for genome-wide sequencing analysis and quantification of circulating microRNAs. Quantitative reverse transcription PCR (qRT-PCR) assays were used to validate expression profiles of differentially expressed circulating microRNAs identified from NGS analysis of dogs with CHF. RESULTS 326 microRNAs were identified with NGS analysis. Hierarchical analysis revealed distinct expression patterns of circulating microRNAs between healthy dogs and dogs with CHF. Results of qRT-PCR assays confirmed upregulation of 4 microRNAs (miR-133, miR-1, miR-let-7e, and miR-125) and downregulation of 4 selected microRNAs (miR-30c, miR-128, miR-142, and miR-423). Results of qRT-PCR assays were highly correlated with NGS data and supported the specificity of circulating microRNA expression profiles in dogs with CHF secondary to MMVD. CONCLUSIONS AND CLINICAL RELEVANCE These results suggested that circulating microRNA expression patterns were unique and could serve as molecular biomarkers of CHF in dogs with MMVD.
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Roldán V, Arroyo AB, Salloum-Asfar S, Manzano-Fernández S, García-Barberá N, Marín F, Vicente V, González-Conejero R, Martínez C. Prognostic role of MIR146A polymorphisms for cardiovascular events in atrial fibrillation. Thromb Haemost 2017; 112:781-8. [DOI: 10.1160/th14-01-0092] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 05/21/2014] [Indexed: 11/05/2022]
Abstract
SummaryThere are few biomarkers able to forecast new thrombotic events in patients with AF. In this framework, microRNAs have emerged as critical players in cardiovascular biology. In particular, miR-146a-5p is recognised as an important negative regulator of inflammation. This study aims to evaluate the prognostic role and biological effect of functional MIR146A polymorphisms, rs2431697 and rs2910164, in non-valvular atrial fibrillation (AF) patients under oral anticoagulation. We studied 901 patients with permanent/paroxysmal AF stabilized for at least six months. Patients were followed-up for two years and adverse cardiovascular events (ACE) were recorded. In vitro studies were performed in monocytes from healthy homozygous for the two genotypes of rs2431697. Rs2910164 had no association with ACE. However, multivariate analysis (adjusted by CHA2DS2–VASc score) revealed that rs2431697TT was associated with adverse cardiovascular events [HR: 1.64 (1.09–2.47); p=0.017]. The predictive value of usefulness of the CHA2DS2–VASc+IL6+rs2431697 for predicting ACE, was statistically better than that predicted by CHA2DS2–VASc+IL6. Functional studies showed that after 24 hours incubation, monocytes from CC individuals showed a 65 % increase in miR-146a-5p levels, while TT individuals only showed a 28 % increase. Indeed, after 24 hours of LPS activation, TT monocytes showed a higher increase in IL6 mRNA expression than CC (52 % vs 26 %). Our study established MIR146A rs2431697 as a prognostic biomarker for ACE in anticoagulated AF patients. These data suggest that TT individuals, when submitted to an inflammatory stress, may be prone to a highest pro-inflammatory state due, in part, to lower levels of miR-146a-5p.
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Feldman A, Moreira DAR, Gun C, Wang HTL, Hirata MH, de Freitas Germano J, Leite GGS, Farsky P. Analysis of Circulating miR-1, miR-23a, and miR-26a in Atrial Fibrillation Patients Undergoing Coronary Bypass Artery Grafting Surgery. Ann Hum Genet 2017; 81:99-105. [PMID: 28422282 DOI: 10.1111/ahg.12188] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 01/28/2017] [Accepted: 01/30/2017] [Indexed: 01/04/2023]
Abstract
Atrial fibrillation (AF) is the most common arrhythmia after cardiac surgery. From a pathophysiological point of view, a myriad of factors such as trauma, atrial dilation, ischemia, mechanical myopericarditis, autonomic imbalance, loss of connexins, AF nest remodeling, inflammation, sutures, and dysfunction caused by postextracorporeal circulation can contribute to postoperative atrial fibrillation (POAF) resulting in a longer hospital stay and consequently higher cost. Recent studies showed that short fragments of RNA, called microRNA (miRNA), can contribute to the development of several cardiovascular diseases, including AF. The aim of this study was to evaluate the levels of circulating miRNAs (miR-1, -23a, and -26a) that can be involved in POAF. Patients submitted to coronary artery bypass graft surgery were grouped in POAF (24 patients) and without POAF (24 patients). Results showed older age, longer clamp-time, and more days in the intensive care unit as well as a longer total hospital stay in the POAF group. Preoperative levels of circulating miRNAs were similar. Analysis of miRNAs revealed significantly lower circulating levels of miRNA-23a (P = 0.02) and -26a (P = 0.01) in the POAF group during the postoperative period. Receiver operating characteristic (ROC) analysis showed the area under the ROC curve of miR-23a and miR-26a for predicting FA was 0.63 (95% confidence interval [CI]: 0.51-0.74; P = 0.02) and 0.66 (95% CI: 0.55-0.77; P = 0.01), respectively. Our data suggests that circulating miRNA-23a and -26a may be involved in the underlying biology of postoperative AF development.
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Affiliation(s)
- Andre Feldman
- Instituto Dante Pazzanese de Cardiologia Sao Paulo, São Paulo, BR
| | | | - Carlos Gun
- Instituto Dante Pazzanese de Cardiologia Sao Paulo, São Paulo, BR
| | - Hui-Tzu Lin Wang
- Instituto Dante Pazzanese de Cardiologia Sao Paulo, São Paulo, BR
| | | | | | | | - Pedro Farsky
- Instituto Dante Pazzanese de Cardiologia Sao Paulo, São Paulo, BR
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Schulte C, Karakas M, Zeller T. microRNAs in cardiovascular disease - clinical application. Clin Chem Lab Med 2017; 55:687-704. [PMID: 27914211 DOI: 10.1515/cclm-2016-0576] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 11/02/2016] [Indexed: 12/11/2022]
Abstract
microRNAs (miRNAs) are well-known, powerful regulators of gene expression, and their potential to serve as circulating biomarkers is widely accepted. In cardiovascular disease (CVD), numerous studies have suggested miRNAs as strong circulating biomarkers with high diagnostic as well as prognostic power. In coronary artery disease (CAD) and heart failure (HF), miRNAs have been suggested as reliable biomarkers matching up to established protein-based such as cardiac troponins (cT) or natriuretic peptides. Also, in other CVD entities, miRNAs were identified as surprisingly specific biomarkers - with great potential for clinical applicability, especially in those entities that lack specific protein-based biomarkers such as atrial fibrillation (AF) and acute pulmonary embolism (APE). In this regard, miRNA signatures, comprising a set of miRNAs, yield high sensitivity and specificity. Attempts to utilize miRNAs as therapeutic agents have led to promising results. In this article, we review the clinical applicability of circulating miRNAs in CVD. We are giving an overview of miRNAs as biomarkers in numerous CVD entities to depict the variety of their potential clinical deployment. We illustrate the function of miRNAs by means of single miRNA examples in CVD.
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Affiliation(s)
- Christian Schulte
- Department of General and Interventional Cardiology, University Heart Center Hamburg Eppendorf, Hamburg
| | - Mahir Karakas
- Department of General and Interventional Cardiology, University Heart Center Hamburg Eppendorf, Hamburg
| | - Tanja Zeller
- Department of General and Interventional Cardiology, University Heart Center Hamburg Eppendorf, Hamburg
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Masè M, Grasso M, Avogaro L, D’Amato E, Tessarolo F, Graffigna A, Denti MA, Ravelli F. Selection of reference genes is critical for miRNA expression analysis in human cardiac tissue. A focus on atrial fibrillation. Sci Rep 2017; 7:41127. [PMID: 28117343 PMCID: PMC5259703 DOI: 10.1038/srep41127] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 12/15/2016] [Indexed: 12/23/2022] Open
Abstract
MicroRNAs (miRNAs) are emerging as key regulators of complex biological processes in several cardiovascular diseases, including atrial fibrillation (AF). Reverse transcription-quantitative polymerase chain reaction is a powerful technique to quantitatively assess miRNA expression profile, but reliable results depend on proper data normalization by suitable reference genes. Despite the increasing number of studies assessing miRNAs in cardiac disease, no consensus on the best reference genes has been reached. This work aims to assess reference genes stability in human cardiac tissue with a focus on AF investigation. We evaluated the stability of five reference genes (U6, SNORD48, SNORD44, miR-16, and 5S) in atrial tissue samples from eighteen cardiac-surgery patients in sinus rhythm and AF. Stability was quantified by combining BestKeeper, delta-Cq, GeNorm, and NormFinder statistical tools. All methods assessed SNORD48 as the best and U6 as the worst reference gene. Applications of different normalization strategies significantly impacted miRNA expression profiles in the study population. Our results point out the necessity of a consensus on data normalization in AF studies to avoid the emergence of divergent biological conclusions.
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Affiliation(s)
- Michela Masè
- Department of Physics, University of Trento, Trento, Italy
| | | | - Laura Avogaro
- Department of Physics, University of Trento, Trento, Italy
- Centre for Integrative Biology, University of Trento, Trento, Italy
| | - Elvira D’Amato
- Department of Physics, University of Trento, Trento, Italy
| | - Francesco Tessarolo
- Healthcare Research and Innovation Program (IRCS-PAT), Bruno Kessler Foundation, Trento, Italy
- Department of Industrial Engineering, University of Trento, Trento, Italy
| | - Angelo Graffigna
- Division of Cardiac Surgery, Santa Chiara Hospital, Trento, Italy
| | | | - Flavia Ravelli
- Department of Physics, University of Trento, Trento, Italy
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Soeki T, Matsuura T, Bando S, Tobiume T, Uematsu E, Ise T, Kusunose K, Yamaguchi K, Yagi S, Fukuda D, Yamada H, Wakatsuki T, Shimabukuro M, Sata M. Relationship between local production of microRNA-328 and atrial substrate remodeling in atrial fibrillation. J Cardiol 2016; 68:472-7. [DOI: 10.1016/j.jjcc.2015.12.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/29/2015] [Accepted: 12/15/2015] [Indexed: 02/01/2023]
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FENG WEI, RAO NINI, WAN YONGLI, LI SAN, ZHENG JI, ZENG WEI, WANG GUANGBIN, CHEN XU. COMPUTATIONAL EVIDENCE FROM TWO CORRELATED DATA SOURCES AT DIFFERENT MOLECULAR LEVELS FOR AF-VHD-SPECIFIC MICRORNA SIGNATURE. J BIOL SYST 2016. [DOI: 10.1142/s0218339016500157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The important roles of microRNAs (miRNAs) in the pathological process of the cardiovascular system have been recognized. However, identification of miRNAs related to valvular heart disease with atrial fibrillation (AF-VHD) has been difficult and very slow because of complex pathological mechanism of AF-VHD. Analysis of microarray expression profiles provides the possibility to rapid prediction of disease-regulating miRNAs and can lay a theoretical foundation for further experimental studies. A computational method is proposed to predict AF-VHD-specific miRNAs by combining miRNA and gene expression data, which are strongly correlated. Using the proposed method, a 45-miRNA AF-VHD-specific signature is predicted. Compared with other related results, 15 of 45 miRNAs are the same and the rest 30 miRNAs are different. Our analysis shows that 11 of 30 new miRNAs are associated with the diseases inducing AF-VHD and the remaining 19 miRNAs have good combinational discrimination power. Therefore, the AF-VHD signature we have predicted is confirmed to be reliable and specific. In a word, this study proposes an effective computational strategy in prediction of disease-regulating miRNAs and finds some AF-VHD-specific miRNAs, which provides new insight into the further experimental study and molecular mechanism leading to the development of AF-VHD.
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Affiliation(s)
- WEI FENG
- Key Laboratory for NeuroInformation of Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610000, P. R. China
| | - NINI RAO
- Key Laboratory for NeuroInformation of Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610000, P. R. China
| | - YONGLI WAN
- Key Laboratory for NeuroInformation of Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610000, P. R. China
| | - SAN LI
- Key Laboratory for NeuroInformation of Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610000, P. R. China
| | - JI ZHENG
- Key Laboratory for NeuroInformation of Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610000, P. R. China
| | - WEI ZENG
- Key Laboratory for NeuroInformation of Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610000, P. R. China
| | - GUANGBIN WANG
- Key Laboratory for NeuroInformation of Ministry of Education, Center for Information in BioMedicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610000, P. R. China
| | - XU CHEN
- Cardiovascular Department, Sichuan Academy of Medical Sciences and Sichuan Provinical People’s Hospital, Chengdu 610000, P. R. China
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Zhao Y, Yuan Y, Qiu C. Underexpression of CACNA1C Caused by Overexpression of microRNA-29a Underlies the Pathogenesis of Atrial Fibrillation. Med Sci Monit 2016; 22:2175-81. [PMID: 27341015 PMCID: PMC4924888 DOI: 10.12659/msm.896191] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Background The objective of this study was to investigate the molecular mechanism of atrial fibrillation (AF), as well as the negative regulatory relationship between miR-29a-3p and CACNA1C. Material/Methods We searched the online miRNA database (www.mirdb.org) and identified the miR-29a-3p binding sequence within the 3′-UTR of the target gene, and then conducted luciferase assay to verify it. The cells were transfected with miR-29a-3p and ICa,L was determined in those cells. Results We validated CACNA1C to be the direct target gene of miR-29a-3p. We also established the negative regulatory relationship between miR-29a-3p and CACNA1C via studying the relative luciferase activity. We also conducted real-time PCR and Western blot analysis to study the mRNA and protein expression level of CACNA1C among different groups of cells treated with scramble control, 30nM miR-29a-3p mimics, and 60nM miR-29a-3p mimics, indicating a negative regulatory relationship between miR-29a-3p and CACNA1C. We next analyzed whether miR-29a-3p transfection in cardiomyocytes produced the effects on the ICa,L induced by electrical remodeling, and found a tonic inhibition of IBa by endogenous miR-29a-3p in atrial myocytes. Conclusions We validated the negative regulation between miR-29a-3p and CACNA1C, and found that miR-29a-3p might a potential therapeutic target in the treatment of AF.
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Affiliation(s)
- Yujie Zhao
- Department of Cardiovascular, No. 7 People's Hospital in Zhengzhou, Zhengzhou, Henan, China (mainland)
| | - Yiqiang Yuan
- Department of Cardiovascular, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Chunguang Qiu
- Department of Cardiovascular, No. 7 People's Hospital in Zhengzhou, Zhengzhou, Henan, China (mainland)
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Yamac AH, Kucukbuzcu S, Ozansoy M, Gok O, Oz K, Erturk M, Yilmaz E, Ersoy B, Zeybek R, Goktekin O, Kilic U. Altered expression of micro-RNA 199a and increased levels of cardiac SIRT1 protein are associated with the occurrence of atrial fibrillation after coronary artery bypass graft surgery. Cardiovasc Pathol 2016; 25:232-236. [DOI: 10.1016/j.carpath.2016.02.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 01/28/2016] [Accepted: 02/09/2016] [Indexed: 10/22/2022] Open
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Hoffmann S, Clauss S, Berger IM, Weiß B, Montalbano A, Röth R, Bucher M, Klier I, Wakili R, Seitz H, Schulze-Bahr E, Katus HA, Flachsbart F, Nebel A, Guenther SP, Bagaev E, Rottbauer W, Kääb S, Just S, Rappold GA. Coding and non-coding variants in the SHOX2 gene in patients with early-onset atrial fibrillation. Basic Res Cardiol 2016; 111:36. [PMID: 27138930 PMCID: PMC4853439 DOI: 10.1007/s00395-016-0557-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 04/18/2016] [Indexed: 11/25/2022]
Abstract
Atrial fibrillation (AF) is the most prevalent cardiac arrhythmia with a strong genetic component. Molecular pathways involving the homeodomain transcription factor Shox2 control the development and function of the cardiac conduction system in mouse and zebrafish. Here we report the analysis of human SHOX2 as a potential susceptibility gene for early-onset AF. To identify causal variants and define the underlying mechanisms, results from 378 patients with early-onset AF before the age of 60 years were analyzed and compared to 1870 controls or reference datasets. We identified two missense mutations (p.G81E, p.H283Q), that were predicted as damaging. Transactivation studies using SHOX2 targets and phenotypic rescue experiments in zebrafish demonstrated that the p.H283Q mutation severely affects SHOX2 pacemaker function. We also demonstrate an association between a 3'UTR variant c.*28T>C of SHOX2 and AF (p = 0.00515). Patients carrying this variant present significantly longer PR intervals. Mechanistically, this variant creates a functional binding site for hsa-miR-92b-5p. Circulating hsa-miR-92b-5p plasma levels were significantly altered in AF patients carrying the 3'UTR variant (p = 0.0095). Finally, we demonstrate significantly reduced SHOX2 expression levels in right atrial appendages of AF patients compared to patients with sinus rhythm. Together, these results suggest a genetic contribution of SHOX2 in early-onset AF.
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Affiliation(s)
- Sandra Hoffmann
- Department of Human Molecular Genetics, Institute of Human Genetics, University Heidelberg, INF 366, 69120, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research), Partner site Heidelberg/Mannheim, Heidelberg, Germany
| | - Sebastian Clauss
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University Munich (LMU), Munich, Germany.,DZHK (German Centre for Cardiovascular Research), Partner site Munich, Munich, Germany
| | - Ina M Berger
- Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Birgit Weiß
- Department of Human Molecular Genetics, Institute of Human Genetics, University Heidelberg, INF 366, 69120, Heidelberg, Germany
| | - Antonino Montalbano
- Department of Human Molecular Genetics, Institute of Human Genetics, University Heidelberg, INF 366, 69120, Heidelberg, Germany
| | - Ralph Röth
- Department of Human Molecular Genetics, Institute of Human Genetics, University Heidelberg, INF 366, 69120, Heidelberg, Germany
| | - Madeline Bucher
- Department of Human Molecular Genetics, Institute of Human Genetics, University Heidelberg, INF 366, 69120, Heidelberg, Germany
| | - Ina Klier
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University Munich (LMU), Munich, Germany
| | - Reza Wakili
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University Munich (LMU), Munich, Germany.,DZHK (German Centre for Cardiovascular Research), Partner site Munich, Munich, Germany
| | - Hervé Seitz
- Institut de génétique humaine (CNRS UPR 1142), Montpellier, France
| | - Eric Schulze-Bahr
- Department of Cardiovascular Medicine, Institute for Genetics of Heart Diseases, University Hospital Münster, Münster, Germany
| | - Hugo A Katus
- DZHK (German Centre for Cardiovascular Research), Partner site Heidelberg/Mannheim, Heidelberg, Germany.,Department of Internal Medicine III, University Hospital Heidelberg, Heidelberg, Germany
| | | | - Almut Nebel
- Institute of Clinical Molecular Biology, University of Kiel, Kiel, Germany
| | - Sabina Pw Guenther
- Department of Cardiac Surgery, University Hospital Munich, Ludwig-Maximilians-University Munich (LMU), Munich, Germany
| | - Erik Bagaev
- Department of Cardiac Surgery, University Hospital Munich, Ludwig-Maximilians-University Munich (LMU), Munich, Germany
| | | | - Stefan Kääb
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University Munich (LMU), Munich, Germany.,DZHK (German Centre for Cardiovascular Research), Partner site Munich, Munich, Germany
| | - Steffen Just
- Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Gudrun A Rappold
- Department of Human Molecular Genetics, Institute of Human Genetics, University Heidelberg, INF 366, 69120, Heidelberg, Germany. .,DZHK (German Centre for Cardiovascular Research), Partner site Heidelberg/Mannheim, Heidelberg, Germany.
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Calore M, De Windt LJ, Rampazzo A. Genetics meets epigenetics: Genetic variants that modulate noncoding RNA in cardiovascular diseases. J Mol Cell Cardiol 2015; 89:27-34. [DOI: 10.1016/j.yjmcc.2015.10.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 10/22/2015] [Accepted: 10/23/2015] [Indexed: 12/30/2022]
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Torrado M, Franco D, Lozano-Velasco E, Hernández-Torres F, Calviño R, Aldama G, Centeno A, Castro-Beiras A, Mikhailov A. A MicroRNA-Transcription Factor Blueprint for Early Atrial Arrhythmogenic Remodeling. Biomed Res Int 2015; 2015:263151. [PMID: 26221584 PMCID: PMC4499376 DOI: 10.1155/2015/263151] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 04/22/2015] [Accepted: 04/23/2015] [Indexed: 12/27/2022]
Abstract
Spontaneous self-terminating atrial fibrillation (AF) is one of the most common heart rhythm disorders, yet the regulatory molecular mechanisms underlying this syndrome are rather unclear. MicroRNA (miRNA) transcriptome and expression of candidate transcription factors (TFs) with potential roles in arrhythmogenesis, such as Pitx2, Tbx5, and myocardin (Myocd), were analyzed by microarray, qRT-PCR, and Western blotting in left atrial (LA) samples from pigs with transitory AF established by right atrial tachypacing. Induced ectopic tachyarrhythmia caused rapid and substantial miRNA remodeling associated with a marked downregulation of Pitx2, Tbx5, and Myocd expression in atrial myocardium. The downregulation of Pitx2, Tbx5, and Myocd was inversely correlated with upregulation of the corresponding targeting miRNAs (miR-21, miR-10a/10b, and miR-1, resp.) in the LA of paced animals. Through in vitro transient transfections of HL-1 atrial myocytes, we further showed that upregulation of miR-21 did result in downregulation of Pitx2 in cardiomyocyte background. The results suggest that immediate-early miRNA remodeling coupled with deregulation of TF expression underlies the onset of AF.
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Affiliation(s)
- Mario Torrado
- Institute of Health Sciences, University of La Coruña, 15006 La Coruña, Spain
| | - Diego Franco
- Department of Experimental Biology, University of Jaén, Jaén, Spain
| | | | | | - Ramón Calviño
- University Hospital Center of La Coruña, La Coruña, Spain
| | | | | | | | - Alexander Mikhailov
- Institute of Health Sciences, University of La Coruña, 15006 La Coruña, Spain
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Yang H, Wu C, Xiao Y, Zhou S. Connexin and fibrosis related microRNAs in complex fractionated atrial electrograms. Arch Med Sci 2015; 11:679-82. [PMID: 26170864 PMCID: PMC4495163 DOI: 10.5114/aoms.2015.52375] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 06/25/2013] [Accepted: 08/30/2013] [Indexed: 02/06/2023] Open
Affiliation(s)
- Hui Yang
- Department of Cardiology, Second Xiangya Hospital, Central South University, Changsha Hunan, China
| | - Chenlu Wu
- Department of Cardiology, Second Xiangya Hospital, Central South University, Changsha Hunan, China
| | - Yichao Xiao
- Department of Cardiology, Second Xiangya Hospital, Central South University, Changsha Hunan, China
| | - Shenghua Zhou
- Department of Cardiology, Second Xiangya Hospital, Central South University, Changsha Hunan, China
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Abstract
OBJECTIVES Although remote ischemic preconditioning (RIPC) has shown favorable effects on ischemia-reperfusion injury, much remains unknown of its mechanisms and clinical significance. We hypothesized that RIPC would reduce the incidence of postoperative atrial fibrillation (POAF) following coronary artery bypass graft (CABG) surgery. In addition, we investigated whether RIPC could induce alterations of circulating microRNA in blood plasma. DESIGN This is a single-center, double-blind, randomized controlled trial. 92 adult patients referred for first-time isolated CABG surgery were randomly assigned to either RIPC (n = 45) or control (n = 47). The RIPC-stimulus comprised three 5-min cycles of upper arm ischemia, induced by inflating a blood pressure cuff to 200 mmHg, with an intervening 5 min reperfusion. Heart rhythm was assessed by telemetry. MicroRNA expression was assessed in plasma by real-time polymerase chain reaction. RESULTS Of the 92 patients included in the study, 27 patients developed POAF (29%). 17 of these patients belonged to the RIPC group (38%), and 10 to the control group (21%). There were no significant alterations of microRNA expression. CONCLUSIONS We did not observe a reduced incidence of POAF by RIPC before CABG surgery. Larger multi-center studies may be necessary to further clarify this issue.
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Nigam D, Kumar S, Mishra D, Rai A, Smita S, Saha A. Synergistic regulatory networks mediated by microRNAs and transcription factors under drought, heat and salt stresses in Oryza Sativa spp. Gene 2015; 555:127-39. [DOI: 10.1016/j.gene.2014.10.054] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 09/12/2014] [Accepted: 10/26/2014] [Indexed: 01/16/2023]
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Wolke C, Bukowska A, Goette A, Lendeckel U. Redox control of cardiac remodeling in atrial fibrillation. Biochim Biophys Acta Gen Subj 2014; 1850:1555-65. [PMID: 25513966 DOI: 10.1016/j.bbagen.2014.12.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 11/04/2014] [Accepted: 12/09/2014] [Indexed: 01/08/2023]
Abstract
BACKGROUND Atrial fibrillation (AF) is the most common arrhythmia in clinical practice and is a potential cause of thromboembolic events. AF induces significant changes in the electrophysiological properties of atrial myocytes and causes alterations in the structure, metabolism, and function of the atrial tissue. The molecular basis for the development of structural atrial remodeling of fibrillating human atria is still not fully understood. However, increased production of reactive oxygen or nitrogen species (ROS/RNS) and the activation of specific redox-sensitive signaling pathways observed both in patients with and animal models of AF are supposed to contribute to development, progression and self-perpetuation of AF. SCOPE OF REVIEW The present review summarizes the sources and targets of ROS/RNS in the setting of AF and focuses on key redox-sensitive signaling pathways that are implicated in the pathogenesis of AF and function either to aggravate or protect from disease. MAJOR CONCLUSIONS NADPH oxidases and various mitochondrial monooxygenases are major sources of ROS during AF. Besides direct oxidative modification of e.g. ion channels and ion handling proteins that are crucially involved in action potential generation and duration, AF leads to the reversible activation of redox-sensitive signaling pathways mediated by activation of redox-regulated proteins including Nrf2, NF-κB, and CaMKII. Both processes are recognized to contribute to the formation of a substrate for AF and, thus, to increase AF inducibility and duration. GENERAL SIGNIFICANCE AF is a prevalent disease and due to the current demographic developments its socio-economic relevance will further increase. Improving our understanding of the role that ROS and redox-related (patho)-mechanisms play in the development and progression of AF may allow the development of a targeted therapy for AF that surpasses the efficacy of previous general anti-oxidative strategies. This article is part of a Special Issue entitled Redox regulation of differentiation and de-differentiation.
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Affiliation(s)
- Carmen Wolke
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, D-17487 Greifswald, Germany
| | - Alicja Bukowska
- EUTRAF Working Group: Molecular Electrophysiology, University Hospital Magdeburg, D-39120 Magdeburg, Germany
| | - Andreas Goette
- EUTRAF Working Group: Molecular Electrophysiology, University Hospital Magdeburg, D-39120 Magdeburg, Germany; Department of Cardiology and Intensive Care Medicine, St. Vincenz-Hospital, D-33098 Paderborn, Germany
| | - Uwe Lendeckel
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, D-17487 Greifswald, Germany.
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Abstract
Cardiovascular diseases are one of the most common causes of death in humans and are responsible for billions of dollars in health care expenditures. As the molecular basis of cardiac diseases continues to be explored, there remains the hope for identification of more effective therapeutics. MicroRNAs (miRNAs) are recognized as important regulators of numerous biological pathways and stress responses, including those found in cardiovascular diseases. MicroRNA signatures of cardiovascular diseases can provide targets for miRNA adjustment and offer the possibility of changing gene and protein expression to treat certain pathologies. These adjustments can be conferred using advances in oligonucleotide delivery methods, which can target single miRNAs, families of miRNAs, and certain tissue types. In this review, we will discuss the use of miRNAs in vivo and recent advances in their use for cardiovascular disease in mammalian models.
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Affiliation(s)
- Tyler Calway
- Institute for Cardiovascular Research, University of Chicago, Chicago, IL, USA
| | - Gene H Kim
- Institute for Cardiovascular Research, University of Chicago, Chicago, IL, USA
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45
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Slagsvold KH, Johnsen AB, Rognmo O, Høydal M, Wisløff U, Wahba A. Comparison of left versus right atrial myocardium in patients with sinus rhythm or atrial fibrillation - an assessment of mitochondrial function and microRNA expression. Physiol Rep 2014; 2:2/8/e12124. [PMID: 25168873 PMCID: PMC4246587 DOI: 10.14814/phy2.12124] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Several of the cellular alterations involved in atrial fibrillation (AF) may be linked to mitochondrial function and altered microRNA (miR) expression. A majority of studies on human myocardium involve right atrial (RA) tissue only. There are indications that AF may affect the two atria differentially. This study aimed to compare interatrial differences in mitochondrial respiration and miR expression in the RA versus left atrium (LA) within patients with sinus rhythm (SR) and AF. Thirty‐seven patients with AF (n = 21) or SR (n = 16), undergoing coronary artery bypass surgery and/or heart valve surgery, were included. Myocardial biopsies were obtained from RA and LA appendages. Mitochondrial respiration was assessed in situ in permeabilized myocardium. MiR array and real‐time quantitative polymerase chain reaction were performed to evaluate miR expression. Mitochondrial respiratory rates were similar in RA versus LA. Expression of miR‐100, ‐10b, ‐133a, ‐133b, ‐146a, ‐155, ‐199a‐5p, ‐208b, and ‐30b were different between the atria in both SR and AF patients. In contrast, differential expression was observed between RA versus LA for miR‐93 in patients with SR only, and for miR‐1, ‐125b, ‐142‐5p, ‐208a, and ‐92b within AF patients only. These results indicate that mitochondrial respiratory capacity is similar in the RA and LA of patients with SR and AF. Differences in miR expressional profiles are observed between the RA versus LA in both SR and AF, and several interatrial differences in miR expression diverge between SR and AF. These findings may contribute to the understanding of how AF pathophysiology may affect the two atria differently. There are indications that atrial fibrillation (AF) may affect the two atria differentially. We assess interatrial differences in mitochondrial respiration and microRNA expression within patients with AF versus SR. The results of our study indicate that mitochondrial respiratory capacity is similar in the right versus the left atrium of patients with SR and AF. Differences in microRNA expression are observed between the right versus left atrium in both SR and AF, and several interatrial differences in miR expression diverge between SR and AF.
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Affiliation(s)
- Katrine Hordnes Slagsvold
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway Department of Cardiothoracic Surgery, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Anne Berit Johnsen
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Oivind Rognmo
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Morten Høydal
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ulrik Wisløff
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Alexander Wahba
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway Department of Cardiothoracic Surgery, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway
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Slagsvold KH, Johnsen AB, Rognmo O, Høydal MA, Wisløff U, Wahba A. Mitochondrial respiration and microRNA expression in right and left atrium of patients with atrial fibrillation. Physiol Genomics 2014; 46:505-11. [PMID: 24824214 DOI: 10.1152/physiolgenomics.00042.2014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Atrial fibrillation (AF) is the most common cardiac arrhythmia with a potential to cause serious complications. Mitochondria play central roles in cardiomyocyte function and have been implicated in AF pathophysiology. MicroRNA (miR) are suggested to influence both mitochondrial function and the development of AF. Yet mitochondrial function and miR expression remain largely unexplored in human atrial tissue. This study aims to investigate mitochondrial function and miR expression in the right (RA) and left atria (LA) of patients with AF and sinus rhythm (SR). Myocardial tissue from the RA and LA appendages was investigated in 37 patients with AF (n = 21) or SR (n = 16) undergoing coronary artery bypass surgery and/or heart valve surgery. Mitochondrial respiration was measured in situ after tissue permeabilization by saponin. MiR expression was assessed by miR array and real-time quantitative reverse-transcription polymerase chain reaction. Maximal mitochondrial respiratory rate was increased in both RA and LA tissue of patients with AF vs. SR. Biatrial downregulation of miR-208a and upregulation of miR-106b, -144, and -451 were observed in AF vs. SR. In addition, miR-15b was upregulated in AF within RA only, and miR-106a, -18a, -18b, -19a, -19b, -23a, -25, -30a, -363, -486-5p, -590-5p, and -93 were upregulated in AF within LA only. These findings suggest that mitochondrial function and miR are involved in AF pathophysiology and should be areas of focus in the exploration for potential novel therapeutic targets.
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Affiliation(s)
- Katrine Hordnes Slagsvold
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and technology, Trondheim, Norway; and Department of Cardiothoracic Surgery, St. Olav's University Hospital, Trondheim, Norway
| | - Anne Berit Johnsen
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and technology, Trondheim, Norway; and
| | - Oivind Rognmo
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and technology, Trondheim, Norway; and
| | - Morten Andre Høydal
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and technology, Trondheim, Norway; and
| | - Ulrik Wisløff
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and technology, Trondheim, Norway; and
| | - Alexander Wahba
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and technology, Trondheim, Norway; and Department of Cardiothoracic Surgery, St. Olav's University Hospital, Trondheim, Norway
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Affiliation(s)
- Siyi Fu
- Regeneration Lab and Experimental Center of Life Sciences, School of Life Science, Shanghai University Shanghai, China ; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University Shanghai, China
| | - Leqi Huang
- Regeneration Lab and Experimental Center of Life Sciences, School of Life Science, Shanghai University Shanghai, China ; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University Shanghai, China
| | - Yalong Wang
- Regeneration Lab and Experimental Center of Life Sciences, School of Life Science, Shanghai University Shanghai, China ; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University Shanghai, China
| | - Xing Li
- Regeneration Lab and Experimental Center of Life Sciences, School of Life Science, Shanghai University Shanghai, China ; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University Shanghai, China
| | - Jie Li
- Regeneration Lab and Experimental Center of Life Sciences, School of Life Science, Shanghai University Shanghai, China ; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University Shanghai, China
| | - Junjie Xiao
- Regeneration Lab and Experimental Center of Life Sciences, School of Life Science, Shanghai University Shanghai, China ; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University Shanghai, China ; Innovative Drug Research Center of Shanghai University Shanghai, China
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Llombart V, Garcia-Berrocoso T, Bustamante A, Fernandez-Cadenas I, Montaner J. Cardioembolic stroke diagnosis using blood biomarkers. Curr Cardiol Rev 2014; 9:340-52. [PMID: 24527683 PMCID: PMC3941099 DOI: 10.2174/1573403x10666140214122633] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 11/12/2013] [Accepted: 02/04/2014] [Indexed: 12/11/2022] Open
Abstract
Stroke is one of the main causes of death and disability in the world. Cardioembolic etiology accounts for approximately
one fifth of all ischemic strokes whereas 25-30% remains undetermined even after an advanced diagnostic
workup. Despite there is not any biomarker currently approved to distinguish cardioembolic stroke among other etiologies
in clinical practice the use of biomarkers represents a promising valuable complement to determine stroke etiology reducing
the number of cryptogenic strokes and aiding in the prescription of the most appropriated primary and secondary
treatments in order to minimize therapeutic risks and to avoid recurrences. In this review we present an update about specific
cardioembolic stroke-related biomarkers at a protein, transcriptomic and genetic level. Finally, we also focused on
reported biomarkers associated with atrial fibrillation (a cardiac illness strongly related with cardioembolic stroke subtype)
thus with a potential to become biomarkers to detect cardioembolic stroke in the future.
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Affiliation(s)
| | | | | | | | - Joan Montaner
- Neurovascular Research Laboratory, Institut de Recerca Vall d'Hebron. Barcelona, Spain. Neurovascular Unit. Department of Neurology. Universitat Autonoma de Barcelona. Hospital Vall d'Hebron. Barcelona. Spain.
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Liu H, Qin H, Chen GX, Liang MY, Rong J, Yao JP, Wu ZK. Comparative expression profiles of microRNA in left and right atrial appendages from patients with rheumatic mitral valve disease exhibiting sinus rhythm or atrial fibrillation. J Transl Med 2014; 12:90. [PMID: 24708751 PMCID: PMC4077055 DOI: 10.1186/1479-5876-12-90] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 04/02/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The atrial fibrillation (AF) associated microRNAs (miRNAs) were found in the right atrium (RA) and left atrium (LA) from patients with rheumatic mitral valve disease (RMVD). However, most studies only focus on the RA; and the potential differences of AF-associated miRNAs between the RA and LA are still unknown. The aim of this study was to perform miRNA expression profiles analysis to compare the potential differences of AF-associated miRNAs in the right atrial appendages (RAA) and left atrial appendages (LAA) from RMVD patients. METHODS Samples tissues from the RAA and LAA were obtained from 18 RMVD patients (10 with AF) during mitral valve replacement surgery. From these tissues, miRNA expression profiles were created and analyzed using a human miRNA microarray. Then, the results were validated using qRT-PCR analysis for 12 selected miRNAs. Finally, potential targets of 10 validated miRNAs were predicted and their functions and potential pathways were analyzed using the miRFocus database. RESULTS In RAA, 65 AF-associated miRNAs were found and significantly dysregulated (i.e. 28 miRNAs were up-regulated and 37 were down-regulated). In LAA, 42 AF-associated miRNAs were found and significantly dysregulated (i.e. 22 miRNAs were up-regulated and 20 were down-regulated). Among these AF-associated miRNAs, 23 of them were found in both RAA and LAA, 45 of them were found only in RAA, and 19 of them were found only in LAA. Finally, 10 AF-associated miRNAs validated by qRT-PCR were similarly distributed in RAA and LAA; 3 were found in both RAA and LAA, 5 were found only in RAA, and 2 were found only in LAA. Potential miRNA targets and molecular pathways were identified. CONCLUSIONS We have found the different distributions of AF-associated miRNAs in the RAA and LAA from RMVD patients. This may reflect different miRNA mechanisms in AF between the RA and LA. These findings may provide new insights into the underlying mechanisms of AF in RMVD patients.
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Affiliation(s)
| | | | | | | | | | | | - Zhong-kai Wu
- Second Department of Cardiac Surgery, First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, China.
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Abstract
SIGNIFICANCE HMG-CoA reductase inhibitors (statins) lower serum cholesterol concentrations and are beneficial in the primary and secondary prevention of coronary heart disease. The positive clinical effects have only partially been reproduced with other lipid-lowering interventions suggesting potential statin effects in addition to cholesterol lowering. In experimental models, direct beneficial cardiovascular effects that are mediated by the inhibition of isoprenoids have been documented, which serve as lipid attachments for intracellular signaling molecules such as small Rho guanosine triphosphate-binding proteins, whose membrane localization and function are dependent on isoprenylation. RECENT ADVANCES Rac1 GTPase is an established master regulator of cell motility through the cortical actin reorganization and of reactive oxygen species generation through the regulation of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity. CRITICAL ISSUES Observations in cells, animals, and humans have implicated the activation of Rac1 GTPase as a key component of cardiovascular pathologies, including the endothelial dysfunction, cardiac hypertrophy and fibrosis, atrial fibrillation, stroke, hypertension, and chronic kidney disease. However, the underlying signal transduction remains incompletely understood. FUTURE DIRECTIONS Based on the recent advance made in Rac1 research in the cardiovascular system by using mouse models with transgenic overexpression of activated Rac1 or conditional knockout, as well as Rac1-specific small molecule inhibitor NSC 23766, the improved understanding of the Rac1-mediated effects statins may help to identify novel therapeutic targets and strategies.
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Affiliation(s)
- Oliver Adam
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes , Homburg, Germany
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