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Shi J, Pan X, Wang Z, Yi M, Xie S, Zhang X, Tao D, Yang Y, Liu Y. SCN5A-L256del and L1621F exhibit loss-of-function properties related to autosomal recessive congenital cardiac disorders presenting as sick sinus syndrome, dilated cardiomyopathy, and sudden cardiac death. Gene 2024; 898:148093. [PMID: 38123004 DOI: 10.1016/j.gene.2023.148093] [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: 10/20/2023] [Revised: 11/30/2023] [Accepted: 12/17/2023] [Indexed: 12/23/2023]
Abstract
Pathogenic mutations in SCN5A could result in dysfunctions of Nav1.5 and consequently lead to a wide range of inherited cardiac diseases. However, the presence of numerous SCN5A-related variants with unknown significance (VUS) and the comprehensive genotype-phenotype relationship pose challenges to precise diagnosis and genetic counseling for affected families. Here, we functionally identified two novel compound heterozygous variants (L256del and L1621F) in SCN5A in a Chinese family exhibiting complex congenital cardiac phenotypes from sudden cardiac death to overlapping syndromes including sick sinus syndrome and dilated cardiomyopathy in an autosomal recessive pattern. In silico tools predicted decreased stability and hydrophobicity of the two mutated proteins due to conformational changes. Patch-clamp electrophysiology revealed slightly decreased sodium currents, accelerated inactivation, and reduced sodium window current in the Nav1.5-L1621F channels as well as no sodium currents in the Nav1.5-L256del channels. Western blotting analysis demonstrated decreased expression levels of mutated Nav1.5 on the plasma membrane, despite enhanced compensatory expression of the total Nav1.5 expression levels. Immunofluorescence imaging showed abnormal condensed spots of the mutated channels within the cytoplasm instead of normal membrane distribution, indicating impaired trafficking. Overall, we identified the loss-of-function characteristics exhibited by the two variants, thereby providing further evidence for their pathogenic nature. Our findings not only extended the variation and phenotype spectrums of SCN5A, but also shed light on the crucial role of patch-clamp electrophysiology in the functional analysis of VUS in SCN5A, which have significant implications for the clinical diagnosis, management, and genetic counseling in affected individuals with complex cardiac phenotypes.
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Affiliation(s)
- Jiaying Shi
- Department of Medical Genetics, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xueqi Pan
- School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
| | - Zhaokun Wang
- Department of Medical Genetics, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Ming Yi
- Department of Medical Genetics, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Shengyu Xie
- Department of Medical Genetics, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xinyue Zhang
- Department of Medical Genetics, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Dachang Tao
- Department of Medical Genetics, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yuan Yang
- Department of Medical Genetics, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China.
| | - Yunqiang Liu
- Department of Medical Genetics, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China.
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2
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Schulze-Bahr E. [Cardiogenetics in Germany- a view and review]. Herzschrittmacherther Elektrophysiol 2024; 35:127-137. [PMID: 38418599 PMCID: PMC10924006 DOI: 10.1007/s00399-024-01008-y] [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] [Accepted: 02/06/2024] [Indexed: 03/01/2024]
Abstract
The development of the cardiogenetics field in Germany has been increasing since the mid-1990s with many national contributions, some of them were really important and groundbreaking. The starting point was and still is the patient and his family, e.g. with a familial form of arrhythmia or cardiomyopathy, the clarification of the genetic cause and the personalized treatment of those being affected. The scientific, always translationally oriented interest in identifying a causative gene and uncovering the underlying pathomechanisms has led to notable contributions for Brugada syndrome, short QT syndrome and cardiac conduction disorders or sinus node dysfunction, but also in DCM or ARVC. What is important, however, is always the way back (bench > bed side): implementation of national and international recommendations for cardiogenetic diagnostics in daily cardiological routine and the personalized care and therapy of those being affected.
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Affiliation(s)
- E Schulze-Bahr
- Institut für Genetik von Herzerkrankungen (IfGH), Spezialambulanz für Patienten mit genetischen Herzerkrankungen, Universitätsklinikum Münster (UKM), Domagkstr. 3, 48145, Münster, Deutschland.
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3
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Errata: Rare Compound Heterozygous Missense Mutation of the SCN5A Gene with Childhood-Onset Sick Sinus Syndrome in Two Chinese Sisters: A Case Report. Int Heart J 2024; 65:169. [PMID: 38296574 DOI: 10.1536/ihj.65-1_Errata] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
An error appeared in the article entitled "Rare Compound Heterozygous Missense Mutation of the SCN5A Gene with Childhood-Onset Sick Sinus Syndrome in Two Chinese Sisters: A Case Report" by Yanyun Wang, Siyu Long, Chenxi Wei, and Xiaoqin Wang (Vol. 64 No.2, 299-305, 2023). The name of the first affiliation on page 299 was wrong. It should be "Laboratory of Molecular Translational Medicine, Center for Translational Medicine, West China Second University Hospital, Sichuan University, Chengdu, China" and not "Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Sichuan University, Chengdu, China".
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Kayser A, Dittmann S, Šarić T, Mearini G, Verkerk AO, Schulze-Bahr E. The W101C KCNJ5 Mutation Induces Slower Pacing by Constitutively Active GIRK Channels in hiPSC-Derived Cardiomyocytes. Int J Mol Sci 2023; 24:15290. [PMID: 37894977 PMCID: PMC10607318 DOI: 10.3390/ijms242015290] [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: 09/18/2023] [Revised: 10/13/2023] [Accepted: 10/15/2023] [Indexed: 10/29/2023] Open
Abstract
Mutations in the KCNJ5 gene, encoding one of the major subunits of cardiac G-protein-gated inwardly rectifying K+ (GIRK) channels, have been recently linked to inherited forms of sinus node dysfunction. Here, the pathogenic mechanism of the W101C KCNJ5 mutation underlying sinus bradycardia in a patient-derived cellular disease model of sinus node dysfunction (SND) was investigated. A human-induced pluripotent stem cell (hiPSCs) line of a mutation carrier was generated, and CRISPR/Cas9-based gene targeting was used to correct the familial mutation as a control line. Both cell lines were further differentiated into cardiomyocytes (hiPSC-CMs) that robustly expressed GIRK channels which underly the acetylcholine-regulated K+ current (IK,ACh). hiPSC-CMs with the W101C KCNJ5 mutation (hiPSCW101C-CM) had a constitutively active IK,ACh under baseline conditions; the application of carbachol was able to increase IK,ACh, further indicating that not all available cardiac GIRK channels were open at baseline. Additionally, hiPSCW101C-CM had a more negative maximal diastolic potential (MDP) and a slower pacing frequency confirming the bradycardic phenotype. Of note, the blockade of the constitutively active GIRK channel with XAF-1407 rescued the phenotype. These results provide further mechanistic insights and may pave the way for the treatment of SND patients with GIRK channel dysfunction.
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Affiliation(s)
- Anne Kayser
- Institute for Genetics of Heart Diseases (IfGH), University Hospital Münster, 48149 Münster, Germany (S.D.); (E.S.-B.)
| | - Sven Dittmann
- Institute for Genetics of Heart Diseases (IfGH), University Hospital Münster, 48149 Münster, Germany (S.D.); (E.S.-B.)
| | - Tomo Šarić
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany;
| | - Giulia Mearini
- Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Arie O. Verkerk
- Department of Medical Biology, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
- Department of Experimental Cardiology, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Eric Schulze-Bahr
- Institute for Genetics of Heart Diseases (IfGH), University Hospital Münster, 48149 Münster, Germany (S.D.); (E.S.-B.)
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5
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He S, Zhang L, Liu XY, Ji XJ, Tang SL, Wu XY, Lu TW. Cerebral Infarction from Sick Sinus Syndrome (Based on SCN5A) via Patent Foramen Ovale. Indian J Pediatr 2023; 90:836. [PMID: 37145349 DOI: 10.1007/s12098-023-04645-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 04/20/2023] [Indexed: 05/06/2023]
Affiliation(s)
- Shuang He
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, 136 Second Zhongshan Road, Chongqing, 400014, China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
- National Clinical Research Center for Child Health and Disorders, Chongqing, China
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China
- Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Lei Zhang
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, 136 Second Zhongshan Road, Chongqing, 400014, China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
- National Clinical Research Center for Child Health and Disorders, Chongqing, China
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China
- Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Xiao-Yan Liu
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, 136 Second Zhongshan Road, Chongqing, 400014, China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
- National Clinical Research Center for Child Health and Disorders, Chongqing, China
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China
- Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Xiao-Juan Ji
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
- National Clinical Research Center for Child Health and Disorders, Chongqing, China
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China
- Chongqing Key Laboratory of Pediatrics, Chongqing, China
- Department of Ultrasound, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Shi-Long Tang
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
- National Clinical Research Center for Child Health and Disorders, Chongqing, China
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China
- Chongqing Key Laboratory of Pediatrics, Chongqing, China
- Department of Radiology, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Xiao-Yun Wu
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, 136 Second Zhongshan Road, Chongqing, 400014, China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
- National Clinical Research Center for Child Health and Disorders, Chongqing, China
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China
- Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Tie-Wei Lu
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, 136 Second Zhongshan Road, Chongqing, 400014, China.
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China.
- National Clinical Research Center for Child Health and Disorders, Chongqing, China.
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China.
- Chongqing Key Laboratory of Pediatrics, Chongqing, China.
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6
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Wang Y, Long S, Wei C, Wang X. Rare Compound Heterozygous Missense Mutation of the SCN5A Gene with Childhood-Onset Sick Sinus Syndrome in Two Chinese Sisters. Int Heart J 2023; 64:299-305. [PMID: 36927930 DOI: 10.1536/ihj.22-515] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Sick sinus syndrome (SSS) is a group of syndromes characterized by pathological changes in the sinoatrial node and its adjacent tissues. Although several mutations in the SCN5A gene have been associated with early-onset SSS, pediatric patients are still less common. Here, we report a rare compound missense mutation in the SCN5A gene [c.2893C>T (p. R965C) and c.2431C>T (p. R811C) ] in two sisters with childhood-onset SSS in Chinese population. The proband (5 years and 5 months old) was the second child of a clinically normal and nonconsanguineous couple. Her elder sister was 12 years old and had been implanted with a pacemaker because of the diagnosis of SSS at another hospital one year ago. The proband was presented to the hospital with a slowed heart rate and reduced endurance exercise capacity for more than three months. After a comprehensive clinical examination, she was diagnosed with SSS and underwent pacemaker implantation. Exome and Sanger sequencing were used to determine the compound heterozygous missense mutation of [c.2893C>T (p. R965C) and c.2431C>T (p. R811C) ] in the SCN5A in the patient and her elder sister. Each healthy parent carried a different heterozygous missense mutation. The compound heterozygous mutation of c.2893C>T (p. R965C) and c.2431C>T (p. R811C) rather than the single mutation might be the primary cause of familial early-onset SSS in Chinese population. Our current findings expanded the current understanding of the SCN5A gene mutations. We further confirmed the essential role of the SCN5A gene on the diagnosis, family cascade screening, early intervention, and prognostic evaluation of SSS.
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Affiliation(s)
- Yanyun Wang
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Sichuan University
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education
- NHC Key Laboratory of Chronobiology (Sichuan University), West China Second University Hospital, Sichuan University
| | - Siyu Long
- Department of Immunology, West China School of Basic Medical Science and Forensic Medicine, Sichuan University
| | - Chenxi Wei
- Wu Yuzhang Honors College, Sichuan University
| | - Xiaoqin Wang
- NHC Key Laboratory of Chronobiology (Sichuan University), West China Second University Hospital, Sichuan University
- Department of Pediatric Cardiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education
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7
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Manoj P, Kim JA, Kim S, Li T, Sewani M, Chelu MG, Li N. Sinus node dysfunction: current understanding and future directions. Am J Physiol Heart Circ Physiol 2023; 324:H259-H278. [PMID: 36563014 PMCID: PMC9886352 DOI: 10.1152/ajpheart.00618.2022] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
The sinoatrial node (SAN) is the primary pacemaker of the heart. Normal SAN function is crucial in maintaining proper cardiac rhythm and contraction. Sinus node dysfunction (SND) is due to abnormalities within the SAN, which can affect the heartbeat frequency, regularity, and the propagation of electrical pulses through the cardiac conduction system. As a result, SND often increases the risk of cardiac arrhythmias. SND is most commonly seen as a disease of the elderly given the role of degenerative fibrosis as well as other age-dependent changes in its pathogenesis. Despite the prevalence of SND, current treatment is limited to pacemaker implantation, which is associated with substantial medical costs and complications. Emerging evidence has identified various genetic abnormalities that can cause SND, shedding light on the molecular underpinnings of SND. Identification of these molecular mechanisms and pathways implicated in the pathogenesis of SND is hoped to identify novel therapeutic targets for the development of more effective therapies for this disease. In this review article, we examine the anatomy of the SAN and the pathophysiology and epidemiology of SND. We then discuss in detail the most common genetic mutations correlated with SND and provide our perspectives on future research and therapeutic opportunities in this field.
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Affiliation(s)
- Pavan Manoj
- School of Public Health, Texas A&M University, College Station, Texas
| | - Jitae A Kim
- Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Stephanie Kim
- Department of BioSciences, Rice University, Houston, Texas
| | - Tingting Li
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Maham Sewani
- Department of BioSciences, Rice University, Houston, Texas
| | - Mihail G Chelu
- Division of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Na Li
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, Texas
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Rinné S, Stallmeyer B, Pinggera A, Netter MF, Matschke LA, Dittmann S, Kirchhefer U, Neudorf U, Opp J, Striessnig J, Decher N, Schulze-Bahr E. Whole Exome Sequencing Identifies a Heterozygous Variant in the Cav1.3 Gene CACNA1D Associated with Familial Sinus Node Dysfunction and Focal Idiopathic Epilepsy. Int J Mol Sci 2022; 23:ijms232214215. [PMID: 36430690 PMCID: PMC9693521 DOI: 10.3390/ijms232214215] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 11/04/2022] [Accepted: 11/11/2022] [Indexed: 11/18/2022] Open
Abstract
Cav1.3 voltage-gated L-type calcium channels (LTCCs) are involved in cardiac pacemaking, hearing and hormone secretion, but are also expressed postsynaptically in neurons. So far, homozygous loss of function mutations in CACNA1D encoding the Cav1.3 α1-subunit are described in congenital sinus node dysfunction and deafness. In addition, germline mutations in CACNA1D have been linked to neurodevelopmental syndromes including epileptic seizures, autism, intellectual disability and primary hyperaldosteronism. Here, a three-generation family with a syndromal phenotype of sinus node dysfunction, idiopathic epilepsy and attention deficit hyperactivity disorder (ADHD) is investigated. Whole genome sequencing and functional heterologous expression studies were used to identify the disease-causing mechanisms in this novel syndromal disorder. We identified a heterozygous non-synonymous variant (p.Arg930His) in the CACNA1D gene that cosegregated with the combined clinical phenotype in an autosomal dominant manner. Functional heterologous expression studies showed that the CACNA1D variant induces isoform-specific alterations of Cav1.3 channel gating: a gain of ion channel function was observed in the brain-specific short CACNA1D isoform (Cav1.3S), whereas a loss of ion channel function was seen in the long (Cav1.3L) isoform. The combined gain-of-function (GOF) and loss-of-function (LOF) induced by the R930H variant are likely to be associated with the rare combined clinical and syndromal phenotypes in the family. The GOF in the Cav1.3S variant with high neuronal expression is likely to result in epilepsy, whereas the LOF in the long Cav1.3L variant results in sinus node dysfunction.
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Affiliation(s)
- Susanne Rinné
- Institute of Physiology and Pathophysiology, Vegetative Physiology, University of Marburg, 35037 Marburg, Germany
| | - Birgit Stallmeyer
- Institute for Genetics of Heart Diseases (IfGH), University Hospital Muenster, 48149 Muenster, Germany
| | - Alexandra Pinggera
- Department of Pharmacology and Toxicology, Center for Molecular Biosciences, University of Innsbruck, 6020 Innsbruck, Austria
| | - Michael F. Netter
- Institute of Physiology and Pathophysiology, Vegetative Physiology, University of Marburg, 35037 Marburg, Germany
| | - Lina A. Matschke
- Institute of Physiology and Pathophysiology, Vegetative Physiology, University of Marburg, 35037 Marburg, Germany
| | - Sven Dittmann
- Institute for Genetics of Heart Diseases (IfGH), University Hospital Muenster, 48149 Muenster, Germany
| | - Uwe Kirchhefer
- Institute of Pharmacology and Toxicology, University Hospital Muenster, 48149 Muenster, Germany
| | - Ulrich Neudorf
- Zentrum für Kinder-und Jugendmedizin, Klinik für Kinderheilkunde III-Bereich Kardiologie, University Hospital Essen, 45147 Essen, Germany
| | - Joachim Opp
- Ev. Krankenhaus Oberhausen, 46047 Oberhausen, Germany
| | - Jörg Striessnig
- Department of Pharmacology and Toxicology, Center for Molecular Biosciences, University of Innsbruck, 6020 Innsbruck, Austria
| | - Niels Decher
- Institute of Physiology and Pathophysiology, Vegetative Physiology, University of Marburg, 35037 Marburg, Germany
- Correspondence: (N.D.); (E.S.-B.); Tel.: +49-(0)6421/28-62148 (N.D.); +49-(0)251/83-55326 (E.S.-B.)
| | - Eric Schulze-Bahr
- Institute for Genetics of Heart Diseases (IfGH), University Hospital Muenster, 48149 Muenster, Germany
- Correspondence: (N.D.); (E.S.-B.); Tel.: +49-(0)6421/28-62148 (N.D.); +49-(0)251/83-55326 (E.S.-B.)
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9
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Sanner K, Mueller-Leisse J, Zormpas C, Duncker D, Leffler A, Veltmann C. A novel SCN5A variant causes temperature-sensitive loss-of-function in a family with symptomatic Brugada syndrome, cardiac conduction disease and sick sinus syndrome. Cardiology 2021; 146:754-762. [PMID: 34348284 DOI: 10.1159/000518210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 06/28/2021] [Indexed: 11/19/2022]
Affiliation(s)
- Karolina Sanner
- Department of Anesthesiology and Intensive Care Medicine, Hannover Medical School, Hannover, Germany
| | - Johanna Mueller-Leisse
- Rhythmology and Electrophysiology, Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
| | - Christos Zormpas
- Rhythmology and Electrophysiology, Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
| | - David Duncker
- Rhythmology and Electrophysiology, Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
| | - Andreas Leffler
- Department of Anesthesiology and Intensive Care Medicine, Hannover Medical School, Hannover, Germany,
| | - Christian Veltmann
- Rhythmology and Electrophysiology, Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
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10
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Ou ZH, Mai JH, Liu L, Zeng SY, Li BN, Xu MG, Liu C. [Intellectual disorder and idiopathic sick sinus syndrome associated with GNB5 mutation: a case report]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:185-187. [PMID: 33611908 DOI: 10.3760/cma.j.cn112148-20200423-00342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Z H Ou
- Department of Cardiology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - J H Mai
- Department of Neurology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - L Liu
- Department of Cardiology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - S Y Zeng
- Department of Pediatric Cardiology, Guangdong Provincial Cardiovascular Institute, Guangdong General Hospital, Guangzhou 510080, China
| | - B N Li
- Department of Cardiology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - M G Xu
- Department of Cardiology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - C Liu
- Department of Cardiology, Shenzhen Children's Hospital, Shenzhen 518038, China
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11
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Porretta AP, Davoine E, Superti-Furga A, Bhuiyan ZA, Domenichini G, Herrera Siklody C, Pascale P, Haddad C, Schläpfer J, Pruvot É. [Sinus node dysfunction, Brugada syndrome and long QT syndrome affecting the same patient : when genetics can't make head or tail of it]. Rev Med Suisse 2020; 16:1148-1152. [PMID: 32496703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The gene SCN5A encodes the cardiac sodium channel which, through the conduction of Na+ current into the cell, generates the fast upstroke of the action potential of cardiomyocytes. Pathogenic variants of SCN5A have been causally associated to several hereditary cardiac diseases including, among others, Brugada syndrome, congenital long QT syndrome and sinus node dysfunction. Recently, overlap syndromes have been described that are characterized by the simultaneous expression of mixed clinical phenotypes among two or more hereditary cardiac diseases associated to the gene SCN5A (HCD-SCN5A). For this reason, it is time to rethink about HCD-SCN5A as different expressions of the same complex spectrum encompassing multiple clinical phenotypes with pronounced overlaps instead of as distinct clinical entities.
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Affiliation(s)
- Alessandra Pia Porretta
- Service de cardiologie, Département cœur-vaisseaux, CHUV, 1011 Lausanne
- Université de Pavie, 27100 Pavie, Italie
| | - Emeline Davoine
- Service de médecine génétique, Département médecine de laboratoire et pathologie, CHUV, 1011 Lausanne
| | - Andrea Superti-Furga
- Service de médecine génétique, Département médecine de laboratoire et pathologie, CHUV, 1011 Lausanne
| | - Zahurul Alam Bhuiyan
- Service de médecine génétique, Département médecine de laboratoire et pathologie, CHUV, 1011 Lausanne
| | | | | | - Patrizio Pascale
- Service de cardiologie, Département cœur-vaisseaux, CHUV, 1011 Lausanne
| | - Christelle Haddad
- Service de cardiologie, Département cœur-vaisseaux, CHUV, 1011 Lausanne
| | - Jürg Schläpfer
- Service de cardiologie, Département cœur-vaisseaux, CHUV, 1011 Lausanne
| | - Étienne Pruvot
- Service de cardiologie, Département cœur-vaisseaux, CHUV, 1011 Lausanne
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Yan J, Li H, Bu H, Jiao K, Zhang AX, Le T, Cao H, Li Y, Ding Y, Xu X. Aging-associated sinus arrest and sick sinus syndrome in adult zebrafish. PLoS One 2020; 15:e0232457. [PMID: 32401822 PMCID: PMC7219707 DOI: 10.1371/journal.pone.0232457] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 02/01/2020] [Accepted: 04/15/2020] [Indexed: 12/24/2022] Open
Abstract
Because of its powerful genetics, the adult zebrafish has been increasingly used for studying cardiovascular diseases. Considering its heart rate of ~100 beats per minute at ambient temperature, which is very close to human, we assessed the use of this vertebrate animal for modeling heart rhythm disorders such as sinus arrest (SA) and sick sinus syndrome (SSS). We firstly optimized a protocol to measure electrocardiogram in adult zebrafish. We determined the location of the probes, implemented an open-chest microsurgery procedure, measured the effects of temperature, and determined appropriate anesthesia dose and time. We then proposed an PP interval of more than 1.5 seconds as an arbitrary criterion to define an SA episode in an adult fish at ambient temperature, based on comparison between the current definition of an SA episode in humans and our studies of candidate SA episodes in aged wild-type fish and Tg(SCN5A-D1275N) fish (a fish model for inherited SSS). With this criterion, a subpopulation of about 5% wild-type fish can be considered to have SA episodes, and this percentage significantly increases to about 25% in 3-year-old fish. In response to atropine, this subpopulation has both common SSS phenotypic traits that are shared with the Tg(SCN5A-D1275N) model, such as bradycardia; and unique SSS phenotypic traits, such as increased QRS/P ratio and chronotropic incompetence. In summary, this study defined baseline SA and SSS in adult zebrafish and underscored use of the zebrafish as an alternative model to study aging-associated SSS.
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Affiliation(s)
- Jianhua Yan
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, United States of America
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
- Division of Cardiology, Xinhua Hospital Affiliated To Shanghai Jiaotong University School Of Medicine, Shanghai, China
| | - Hongsong Li
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, United States of America
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Haisong Bu
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, United States of America
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Kunli Jiao
- Division of Cardiology, Xinhua Hospital Affiliated To Shanghai Jiaotong University School Of Medicine, Shanghai, China
| | - Alex X. Zhang
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, United States of America
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Tai Le
- Department of Electrical Engineering and Computer Science, UC Irvine, Irvine, California
| | - Hung Cao
- Department of Electrical Engineering and Computer Science, UC Irvine, Irvine, California
- Department of Biomedical Engineering, UC Irvine, Irvine, California
| | - Yigang Li
- Division of Cardiology, Xinhua Hospital Affiliated To Shanghai Jiaotong University School Of Medicine, Shanghai, China
| | - Yonghe Ding
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, United States of America
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Xiaolei Xu
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, United States of America
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
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Piché J, Van Vliet PP, Pucéat M, Andelfinger G. The expanding phenotypes of cohesinopathies: one ring to rule them all! Cell Cycle 2019; 18:2828-2848. [PMID: 31516082 PMCID: PMC6791706 DOI: 10.1080/15384101.2019.1658476] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [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: 05/28/2019] [Revised: 08/13/2019] [Accepted: 08/17/2019] [Indexed: 12/13/2022] Open
Abstract
Preservation and development of life depend on the adequate segregation of sister chromatids during mitosis and meiosis. This process is ensured by the cohesin multi-subunit complex. Mutations in this complex have been associated with an increasing number of diseases, termed cohesinopathies. The best characterized cohesinopathy is Cornelia de Lange syndrome (CdLS), in which intellectual and growth retardations are the main phenotypic manifestations. Despite some overlap, the clinical manifestations of cohesinopathies vary considerably. Novel roles of the cohesin complex have emerged during the past decades, suggesting that important cell cycle regulators exert important biological effects through non-cohesion-related functions and broadening the potential pathomechanisms involved in cohesinopathies. This review focuses on non-cohesion-related functions of the cohesin complex, gene dosage effect, epigenetic regulation and TGF-β in cohesinopathy context, especially in comparison to Chronic Atrial and Intestinal Dysrhythmia (CAID) syndrome, a very distinct cohesinopathy caused by a homozygous Shugoshin-1 (SGO1) mutation (K23E) and characterized by pacemaker failure in both heart (sick sinus syndrome followed by atrial flutter) and gut (chronic intestinal pseudo-obstruction) with no intellectual or growth delay. We discuss the possible impact of SGO1 alterations in human pathologies and the potential impact of the SGO1 K23E mutation in the sinus node and gut development and functions. We suggest that the human phenotypes observed in CdLS, CAID syndrome and other cohesinopathies can inform future studies into the less well-known non-cohesion-related functions of cohesin complex genes. Abbreviations: AD: Alzheimer Disease; AFF4: AF4/FMR2 Family Member 4; ANKRD11: Ankyrin Repeat Domain 11; APC: Anaphase Promoter Complex; ASD: Atrial Septal Defect; ATRX: ATRX Chromatin Remodeler; ATRX: Alpha Thalassemia X-linked intellectual disability syndrome; BIRC5: Baculoviral IAP Repeat Containing 5; BMP: Bone Morphogenetic Protein; BRD4: Bromodomain Containing 4; BUB1: BUB1 Mitotic Checkpoint Serine/Threonine Kinase; CAID: Chronic Atrial and Intestinal Dysrhythmia; CDK1: Cyclin Dependent Kinase 1; CdLS: Cornelia de Lange Syndrome; CHD: Congenital Heart Disease; CHOPS: Cognitive impairment, coarse facies, Heart defects, Obesity, Pulmonary involvement, Short stature, and skeletal dysplasia; CIPO: Chronic Intestinal Pseudo-Obstruction; c-kit: KIT Proto-Oncogene Receptor Tyrosine Kinase; CoATs: Cohesin Acetyltransferases; CTCF: CCCTC-Binding Factor; DDX11: DEAD/H-Box Helicase 11; ERG: Transcriptional Regulator ERG; ESCO2: Establishment of Sister Chromatid Cohesion N-Acetyltransferase 2; GJC1: Gap Junction Protein Gamma 1; H2A: Histone H2A; H3K4: Histone H3 Lysine 4; H3K9: Histone H3 Lysine 9; HCN4: Hyperpolarization Activated Cyclic Nucleotide Gated Potassium and Sodium Channel 4;p HDAC8: Histone deacetylases 8; HP1: Heterochromatin Protein 1; ICC: Interstitial Cells of Cajal; ICC-MP: Myenteric Plexus Interstitial cells of Cajal; ICC-DMP: Deep Muscular Plexus Interstitial cells of Cajal; If: Pacemaker Funny Current; IP3: Inositol trisphosphate; JNK: C-Jun N-Terminal Kinase; LDS: Loeys-Dietz Syndrome; LOAD: Late-Onset Alzheimer Disease; MAPK: Mitogen-Activated Protein Kinase; MAU: MAU Sister Chromatid Cohesion Factor; MFS: Marfan Syndrome; NIPBL: NIPBL, Cohesin Loading Factor; OCT4: Octamer-Binding Protein 4; P38: P38 MAP Kinase; PDA: Patent Ductus Arteriosus; PDS5: PDS5 Cohesin Associated Factor; P-H3: Phospho Histone H3; PLK1: Polo Like Kinase 1; POPDC1: Popeye Domain Containing 1; POPDC2: Popeye Domain Containing 2; PP2A: Protein Phosphatase 2; RAD21: RAD21 Cohesin Complex Component; RBS: Roberts Syndrome; REC8: REC8 Meiotic Recombination Protein; RNAP2: RNA polymerase II; SAN: Sinoatrial node; SCN5A: Sodium Voltage-Gated Channel Alpha Subunit 5; SEC: Super Elongation Complex; SGO1: Shogoshin-1; SMAD: SMAD Family Member; SMC1A: Structural Maintenance of Chromosomes 1A; SMC3: Structural Maintenance of Chromosomes 3; SNV: Single Nucleotide Variant; SOX2: SRY-Box 2; SOX17: SRY-Box 17; SSS: Sick Sinus Syndrome; STAG2: Cohesin Subunit SA-2; TADs: Topology Associated Domains; TBX: T-box transcription factors; TGF-β: Transforming Growth Factor β; TGFBR: Transforming Growth Factor β receptor; TOF: Tetralogy of Fallot; TREK1: TREK-1 K(+) Channel Subunit; VSD: Ventricular Septal Defect; WABS: Warsaw Breakage Syndrome; WAPL: WAPL Cohesin Release Factor.
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Affiliation(s)
- Jessica Piché
- Cardiovascular Genetics, Department of Pediatrics, CHU Sainte-Justine, Montréal, QC, Canada
| | - Patrick Piet Van Vliet
- Cardiovascular Genetics, Department of Pediatrics, CHU Sainte-Justine, Montréal, QC, Canada
- LIA (International Associated Laboratory), CHU Sainte-Justine, Montréal, QC, Canada
- LIA (International Associated Laboratory), INSERM, Marseille, U1251-13885, France
| | - Michel Pucéat
- LIA (International Associated Laboratory), CHU Sainte-Justine, Montréal, QC, Canada
- LIA (International Associated Laboratory), INSERM, Marseille, U1251-13885, France
- INSERM U-1251, MMG,Aix-Marseille University, Marseille, 13885, France
| | - Gregor Andelfinger
- Cardiovascular Genetics, Department of Pediatrics, CHU Sainte-Justine, Montréal, QC, Canada
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Nikulina SY, Marilovceva OV, Chernova AA, Tret'Jakova SS, Nikulin DA, Maksimov VN. Polymorphisms of the SCN10A Gene in Patients With Sick Sinus Syndrome. Kardiologiia 2018; 58:53-59. [PMID: 30704383 DOI: 10.18087/cardio.2018.4.10096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Indexed: 06/09/2023]
Abstract
PURPOSE To study association of rs6795970 polymorphism of SCN10A gene with development of idiopathic sick sinus syndrome (ISSS). MATERIALS AND METHODS We examined 109 patients with ISSS, 59 their healthy 1-st-, 2-nd-, and 3-rd-degree relatives, and 630 controls. Patients with ISSS were divided into subgroups according to gender and clinical variant of the disease. All patients underwent cardiologic examination and molecular genetic testing of DNA. RESULTS We revealed significant preponderance of homozygous genotype with rare allele of the studied gene among patients with ISSS compared with control group. In addition, this genotype significantly prevailed among men with SSSU in comparison with the control group. CONCLUSION Genotype AA of the SCN10A gene is associated with a predisposition to the development of ISSS.
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Affiliation(s)
- S Yu Nikulina
- ФГБОУ ВО «Красноярский государственный медицинский университет им. проф. В. Ф. Войно-Ясенецкого» Минздрава РФ.
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15
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Aizawa Y, Fujisawa T, Katsumata Y, Kohsaka S, Kunitomi A, Ohno S, Sonoda K, Hayashi H, Hojo R, Fukamizu S, Nagase S, Ito S, Nakajima K, Nishiyama T, Kimura T, Kurita Y, Furukawa Y, Takatsuki S, Ogawa S, Nakazato Y, Sumiyoshi M, Kosaki K, Horie M, Fukuda K. Sex-Dependent Phenotypic Variability of an SCN5A Mutation: Brugada Syndrome and Sick Sinus Syndrome. J Am Heart Assoc 2018; 7:e009387. [PMID: 30371189 PMCID: PMC6222934 DOI: 10.1161/jaha.118.009387] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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] [Received: 04/05/2018] [Accepted: 07/12/2018] [Indexed: 11/25/2022]
Abstract
Background Brugada syndrome ( BS ) is known to be 9 times more prevalent in males than females. However, little is known about the development of sick sinus syndrome in female members with familial BS . Methods and Results Familial BS patients and family members, both from our institutions and collaborating sites that specialize in clinical care of BS , participated in this study. We collected information on their clinical and genetic background, along with the inheritance patterns of BS . Detailed information on each case with familial BS is described. A total of 7 families, including 25 BS patients (12 females and 13 males), were included. Seven were probands and 18 were family members. Ten out of the 12 female patients and none of the 13 male patients developed sick sinus syndrome. Sudden death or spontaneous ventricular fibrillation occurred in 7 out of 13 male patients and 2 out of 12 female patients. Conclusions Familial BS existed in which female patients developed sick sinus syndrome but male patients did not. Some of those female patients with sick sinus syndrome had unrecognized BS . Information should be collected not only regarding a family history of sudden death or BS , but also whether a pacemaker was implanted in female members.
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Affiliation(s)
| | | | | | | | | | - Seiko Ohno
- Shiga University of Medical ScienceOtsuJapan
- National Cerebral and Cardiovascular CenterSuitaJapan
| | - Keiko Sonoda
- Shiga University of Medical ScienceOtsuJapan
- National Cerebral and Cardiovascular CenterSuitaJapan
| | | | | | | | | | | | | | | | | | - Yasuo Kurita
- International University of Health & WelfareTokyoJapan
| | | | | | - Satoshi Ogawa
- International University of Health & WelfareTokyoJapan
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16
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Niculina SY, Marilovceva OV, Chernova AA, Tret'jakova SS, Nikulin DA, Maksimov VN. [Polymorphisms of the SCN10A Gene in Patients With Sick Sinus Syndrome]. Kardiologiia 2018:53-59. [PMID: 29782260] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE To study association of rs6795970 polymorphism of SCN10A gene with development of idiopathic sick sinus syndrome (ISSS). MATERIALS AND METHODS We examined 109 patients with ISSS, 59 their healthy 1‑st-, 2‑nd-, and 3‑rd-degree relatives, and 630 controls. Patients with ISSS were divided into subgroups according to gender and clinical variant of the disease. All patients underwent cardiologic examination and molecular genetic testing of DNA. RESULTS We revealed significant preponderance of homozygous genotype with rare allele of the studied gene among patients with ISSS compared with control group. In addition, this genotype significantly prevailed among men with SSSU in comparison with the control group. CONCLUSION Genotype AA of the SCN10A gene is associated with a predisposition to the development of ISSS.
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Affiliation(s)
- S Y Niculina
- Krasnoyarsk State Medical University named after Prof. V. F. Vojno-Yasenetsky
| | - O V Marilovceva
- Krasnoyarsk State Medical University named after Prof. V. F. Vojno-Yasenetsky
| | - A A Chernova
- Krasnoyarsk State Medical University named after Prof. V. F. Vojno-Yasenetsky
| | - S S Tret'jakova
- Krasnoyarsk State Medical University named after Prof. V. F. Vojno-Yasenetsky
| | - D A Nikulin
- Krasnoyarsk State Medical University named after Prof. V. F. Vojno-Yasenetsky
| | - V N Maksimov
- Federal State Budgetary Institution, "Research Institute of Therapy and Preventive Medicine" at the Siberian Branch of Russian Academy of Medical Sciences
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17
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Yagihara N, Watanabe H, Barnett P, Duboscq-Bidot L, Thomas AC, Yang P, Ohno S, Hasegawa K, Kuwano R, Chatel S, Redon R, Schott JJ, Probst V, Koopmann TT, Bezzina CR, Wilde AAM, Nakano Y, Aiba T, Miyamoto Y, Kamakura S, Darbar D, Donahue BS, Shigemizu D, Tanaka T, Tsunoda T, Suda M, Sato A, Minamino T, Endo N, Shimizu W, Horie M, Roden DM, Makita N. Variants in the SCN5A Promoter Associated With Various Arrhythmia Phenotypes. J Am Heart Assoc 2016; 5:JAHA.116.003644. [PMID: 27625342 PMCID: PMC5079027 DOI: 10.1161/jaha.116.003644] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Mutations in the coding sequence of SCN5A, which encodes the cardiac Na(+) channel α subunit, have been associated with inherited susceptibility to various arrhythmias. Variable expression of SCN5A is a possible mechanism responsible for this pleiotropic effect; however, it is unknown whether variants in the promoter and regulatory regions of SCN5A also modulate the risk of arrhythmias. METHODS AND RESULTS We resequenced the core promoter region of SCN5A and the regulatory regions of SCN5A transcription in 1298 patients with arrhythmia phenotypes (atrial fibrillation, n=444; sinus node dysfunction, n=49; conduction disease, n=133; Brugada syndrome, n=583; and idiopathic ventricular fibrillation, n=89). We identified 26 novel rare variants in the SCN5A promoter in 29 patients affected by various arrhythmias (atrial fibrillation, n=6; sinus node dysfunction, n=1; conduction disease, n=3; Brugada syndrome, n=14; idiopathic ventricular fibrillation, n=5). The frequency of rare variants was higher in patients with arrhythmias than in controls. In the alignment with chromatin immunoprecipitation sequencing data, the majority of variants were located at regions bound by transcription factors. Using a luciferase reporter assay, 6 variants (Brugada syndrome, n=3; idiopathic ventricular fibrillation, n=2; conduction disease, n=1) were functionally characterized, and each displayed decreased promoter activity compared with the wild-type sequences. We also identified rare variants in the regulatory region that were associated with atrial fibrillation, and the variant decreased promoter activity. CONCLUSIONS Variants in the core promoter region and the transcription regulatory region of SCN5A were identified in multiple arrhythmia phenotypes, consistent with the idea that altered SCN5A transcription levels modulate susceptibility to arrhythmias.
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Affiliation(s)
- Nobue Yagihara
- Department of Cardiovascular Biology and Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Hiroshi Watanabe
- Department of Cardiovascular Biology and Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN
| | - Phil Barnett
- Department of Anatomy, Embryology and Physiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Laetitia Duboscq-Bidot
- Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR) 1087, L'Institut du Thorax, Nantes, France Centre National de la Recherche Scientifique (CNRS) UMR 6291, Nantes, France Université de Nantes, France Centre Hospitalier Universitaire (CHU) Nantes, Nantes, France
| | - Atack C Thomas
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN
| | - Ping Yang
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN
| | - Seiko Ohno
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Shiga, Japan
| | - Kanae Hasegawa
- Department of Cardiovascular Biology and Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Ryozo Kuwano
- Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata, Japan
| | - Stéphanie Chatel
- Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR) 1087, L'Institut du Thorax, Nantes, France Centre National de la Recherche Scientifique (CNRS) UMR 6291, Nantes, France Université de Nantes, France Centre Hospitalier Universitaire (CHU) Nantes, Nantes, France
| | - Richard Redon
- Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR) 1087, L'Institut du Thorax, Nantes, France Centre National de la Recherche Scientifique (CNRS) UMR 6291, Nantes, France Université de Nantes, France Centre Hospitalier Universitaire (CHU) Nantes, Nantes, France
| | - Jean-Jacques Schott
- Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR) 1087, L'Institut du Thorax, Nantes, France Centre National de la Recherche Scientifique (CNRS) UMR 6291, Nantes, France Université de Nantes, France Centre Hospitalier Universitaire (CHU) Nantes, Nantes, France
| | - Vincent Probst
- Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR) 1087, L'Institut du Thorax, Nantes, France Centre National de la Recherche Scientifique (CNRS) UMR 6291, Nantes, France Université de Nantes, France Centre Hospitalier Universitaire (CHU) Nantes, Nantes, France
| | - Tamara T Koopmann
- Department of Clinical and Experimental Cardiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Connie R Bezzina
- Department of Clinical and Experimental Cardiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Arthur A M Wilde
- Department of Clinical and Experimental Cardiology, Academic Medical Center, Amsterdam, The Netherlands Princess Al-Jawhara Al-Brahim Centre of Excellence in Research of Hereditary Disorders, Jeddah, Kingdom of Saudi Arabia
| | - Yukiko Nakano
- Division of Frontier Medical Science, Department of Cardiovascular Medicine, Programs for Biomedical Research, Graduate School of Biomedical Science, Hiroshima University, Hiroshima, Japan
| | - Takeshi Aiba
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yoshihiro Miyamoto
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Shiro Kamakura
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Dawood Darbar
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN University of Illinois at Chicago, IL
| | - Brian S Donahue
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN
| | - Daichi Shigemizu
- Department of Medical Science Mathematics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan Laboratory for Medical Science Mathematics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Toshihiro Tanaka
- Department of Human Genetics and Disease Diversity, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tatsuhiko Tsunoda
- Department of Medical Science Mathematics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan Laboratory for Medical Science Mathematics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Masayoshi Suda
- Department of Cardiovascular Biology and Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Akinori Sato
- Department of Cardiovascular Biology and Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Tohru Minamino
- Department of Cardiovascular Biology and Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Naoto Endo
- Division of Orthopedic Surgery, Brain Research Institute, Niigata University, Niigata, Japan Center for the Inter-organ Communication Research, Brain Research Institute, Niigata University, Niigata, Japan
| | - Wataru Shimizu
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan Department of Cardiovascular Medicine, Nippon Medical School, Tokyo, Japan
| | - Minoru Horie
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Shiga, Japan
| | - Dan M Roden
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN
| | - Naomasa Makita
- Department of Molecular Physiology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Chen JY, Liu JH, Wu HDI, Lin KH, Chang KC, Liou YM. Transforming Growth Factor-β1 T869C Gene Polymorphism Is Associated with Acquired Sick Sinus Syndrome via Linking a Higher Serum Protein Level. PLoS One 2016; 11:e0158676. [PMID: 27380173 PMCID: PMC4933337 DOI: 10.1371/journal.pone.0158676] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 12/22/2015] [Accepted: 06/20/2016] [Indexed: 12/19/2022] Open
Abstract
Background Familial sick sinus syndrome is associated with gene mutations and dysfunction of ion channels. In contrast, degenerative fibrosis of the sinus node tissue plays an important role in the pathogenesis of acquired sick sinus syndrome. There is a close relationship between transforming growth factor-β1 mediated cardiac fibrosis and acquired arrhythmia. It is of interest to examine whether transforming growth factor-β1 is involved in the pathogenesis of acquired sick sinus syndrome. Methods Overall, 110 patients with acquired SSS and 137 age/gender-matched controls were screened for transforming growth factor-β1 and cardiac sodium channel gene polymorphisms using gene sequencing or restriction fragment length polymorphism methods. An enzyme-linked immunosorbent assay was used to determine the serum level of transforming growth factor-β1. Results Two transforming growth factor-β1 gene polymorphisms (C-509T and T+869C) and one cardiac sodium channel gene polymorphism (H588R) have been identified. The C-dominant CC/CT genotype frequency of T869C was significantly higher in acquired sick sinus syndrome patients than in controls (OR 2.09, 95% CI 1.16–3.75, P = 0.01). Consistently, the level of serum transforming growth factor-β1 was also significantly greater in acquired sick sinus syndrome group than in controls (5.3±3.4 ng/ml vs. 3.7±2.4 ng/ml, P = 0.01). In addition, the CC/CT genotypes showed a higher transforming growth factor-β1 serum level than the TT genotype (4.25 ± 2.50 ng/ml vs. 2.71± 1.76 ng/ml, P = 0.028) in controls. Conclusion Transforming growth factor-β1 T869C polymorphism, correlated with high serum transforming growth factor-β1 levels, is associated with susceptibility to acquired sick sinus syndrome.
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Affiliation(s)
- Jan-Yow Chen
- Division of Cardiology, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Jiung-Hsiun Liu
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Hong-Dar Isaac Wu
- Department of Applied Mathematics and Institute of Statistics, National Chung Hsing University, Taichung, Taiwan
| | - Kuo-Hung Lin
- Division of Cardiology, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Kuan-Cheng Chang
- Division of Cardiology, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Ying-Ming Liou
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- * E-mail:
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Zaragoza MV, Fung L, Jensen E, Oh F, Cung K, McCarthy LA, Tran CK, Hoang V, Hakim SA, Grosberg A. Exome Sequencing Identifies a Novel LMNA Splice-Site Mutation and Multigenic Heterozygosity of Potential Modifiers in a Family with Sick Sinus Syndrome, Dilated Cardiomyopathy, and Sudden Cardiac Death. PLoS One 2016; 11:e0155421. [PMID: 27182706 PMCID: PMC4868298 DOI: 10.1371/journal.pone.0155421] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [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: 04/13/2016] [Accepted: 04/28/2016] [Indexed: 11/18/2022] Open
Abstract
The goals are to understand the primary genetic mechanisms that cause Sick Sinus Syndrome and to identify potential modifiers that may result in intrafamilial variability within a multigenerational family. The proband is a 63-year-old male with a family history of individuals (>10) with sinus node dysfunction, ventricular arrhythmia, cardiomyopathy, heart failure, and sudden death. We used exome sequencing of a single individual to identify a novel LMNA mutation and demonstrated the importance of Sanger validation and family studies when evaluating candidates. After initial single-gene studies were negative, we conducted exome sequencing for the proband which produced 9 gigabases of sequencing data. Bioinformatics analysis showed 94% of the reads mapped to the reference and identified 128,563 unique variants with 108,795 (85%) located in 16,319 genes of 19,056 target genes. We discovered multiple variants in known arrhythmia, cardiomyopathy, or ion channel associated genes that may serve as potential modifiers in disease expression. To identify candidate mutations, we focused on ~2,000 variants located in 237 genes of 283 known arrhythmia, cardiomyopathy, or ion channel associated genes. We filtered the candidates to 41 variants in 33 genes using zygosity, protein impact, database searches, and clinical association. Only 21 of 41 (51%) variants were validated by Sanger sequencing. We selected nine confirmed variants with minor allele frequencies <1% for family studies. The results identified LMNA c.357-2A>G, a novel heterozygous splice-site mutation as the primary mutation with rare or novel variants in HCN4, MYBPC3, PKP4, TMPO, TTN, DMPK and KCNJ10 as potential modifiers and a mechanism consistent with haploinsufficiency.
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Affiliation(s)
- Michael V. Zaragoza
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
- * E-mail:
| | - Lianna Fung
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Ember Jensen
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Frances Oh
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Katherine Cung
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Linda A. McCarthy
- Department of Biomedical Engineering and The Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California Irvine, Irvine, California, United States of America
| | - Christine K. Tran
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Van Hoang
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Simin A. Hakim
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Anna Grosberg
- Department of Biomedical Engineering and The Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California Irvine, Irvine, California, United States of America
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Celestino-Soper PBS, Doytchinova A, Steiner HA, Uradu A, Lynnes TC, Groh WJ, Miller JM, Lin H, Gao H, Wang Z, Liu Y, Chen PS, Vatta M. Evaluation of the Genetic Basis of Familial Aggregation of Pacemaker Implantation by a Large Next Generation Sequencing Panel. PLoS One 2015; 10:e0143588. [PMID: 26636822 PMCID: PMC4670209 DOI: 10.1371/journal.pone.0143588] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 07/24/2015] [Accepted: 11/06/2015] [Indexed: 12/17/2022] Open
Abstract
Background The etiology of conduction disturbances necessitating permanent pacemaker (PPM) implantation is often unknown, although familial aggregation of PPM (faPPM) suggests a possible genetic basis. We developed a pan-cardiovascular next generation sequencing (NGS) panel to genetically characterize a selected cohort of faPPM. Materials and Methods We designed and validated a custom NGS panel targeting the coding and splicing regions of 246 genes with involvement in cardiac pathogenicity. We enrolled 112 PPM patients and selected nine (8%) with faPPM to be analyzed by NGS. Results Our NGS panel covers 95% of the intended target with an average of 229x read depth at a minimum of 15-fold depth, reaching a SNP true positive rate of 98%. The faPPM patients presented with isolated cardiac conduction disease (ICCD) or sick sinus syndrome (SSS) without overt structural heart disease or identifiable secondary etiology. Three patients (33.3%) had heterozygous deleterious variants previously reported in autosomal dominant cardiac diseases including CCD: LDB3 (p.D117N) and TRPM4 (p.G844D) variants in patient 4; TRPM4 (p.G844D) and ABCC9 (p.V734I) variants in patient 6; and SCN5A (p.T220I) and APOB (p.R3527Q) variants in patient 7. Conclusion FaPPM occurred in 8% of our PPM clinic population. The employment of massive parallel sequencing for a large selected panel of cardiovascular genes identified a high percentage (33.3%) of the faPPM patients with deleterious variants previously reported in autosomal dominant cardiac diseases, suggesting that genetic variants may play a role in faPPM.
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Affiliation(s)
- Patrícia B. S. Celestino-Soper
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - Anisiia Doytchinova
- Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - Hillel A. Steiner
- Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States of America
- Baruch Padeh Medical Center, Poriya MP Lower Galilee, Israel
- Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel
| | - Andrea Uradu
- Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - Ty C. Lynnes
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - William J. Groh
- Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - John M. Miller
- Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - Hai Lin
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, United States of America
- Center for Computational Biology and Bioinformatics, Indiana University Purdue University Indianapolis, Indianapolis, IN, United States of America
| | - Hongyu Gao
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - Zhiping Wang
- Center for Computational Biology and Bioinformatics, Indiana University Purdue University Indianapolis, Indianapolis, IN, United States of America
| | - Yunlong Liu
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, United States of America
- Center for Computational Biology and Bioinformatics, Indiana University Purdue University Indianapolis, Indianapolis, IN, United States of America
| | - Peng-Sheng Chen
- Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - Matteo Vatta
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, United States of America
- Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States of America
- * E-mail:
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Liang X, Zhang Q, Cattaneo P, Zhuang S, Gong X, Spann NJ, Jiang C, Cao X, Zhao X, Zhang X, Bu L, Wang G, Chen HSV, Zhuang T, Yan J, Geng P, Luo L, Banerjee I, Chen Y, Glass CK, Zambon AC, Chen J, Sun Y, Evans SM. Transcription factor ISL1 is essential for pacemaker development and function. J Clin Invest 2015; 125:3256-68. [PMID: 26193633 DOI: 10.1172/jci68257] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 06/04/2015] [Indexed: 01/29/2023] Open
Abstract
The sinoatrial node (SAN) maintains a rhythmic heartbeat; therefore, a better understanding of factors that drive SAN development and function is crucial to generation of potential therapies, such as biological pacemakers, for sinus arrhythmias. Here, we determined that the LIM homeodomain transcription factor ISL1 plays a key role in survival, proliferation, and function of pacemaker cells throughout development. Analysis of several Isl1 mutant mouse lines, including animals harboring an SAN-specific Isl1 deletion, revealed that ISL1 within SAN is a requirement for early embryonic viability. RNA-sequencing (RNA-seq) analyses of FACS-purified cells from ISL1-deficient SANs revealed that a number of genes critical for SAN function, including those encoding transcription factors and ion channels, were downstream of ISL1. Chromatin immunoprecipitation assays performed with anti-ISL1 antibodies and chromatin extracts from FACS-purified SAN cells demonstrated that ISL1 directly binds genomic regions within several genes required for normal pacemaker function, including subunits of the L-type calcium channel, Ank2, and Tbx3. Other genes implicated in abnormal heart rhythm in humans were also direct ISL1 targets. Together, our results demonstrate that ISL1 regulates approximately one-third of SAN-specific genes, indicate that a combination of ISL1 and other SAN transcription factors could be utilized to generate pacemaker cells, and suggest ISL1 mutations may underlie sick sinus syndrome.
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Ziyadeh-Isleem A, Clatot J, Duchatelet S, Gandjbakhch E, Denjoy I, Hidden-Lucet F, Hatem S, Deschênes I, Coulombe A, Neyroud N, Guicheney P. A truncating SCN5A mutation combined with genetic variability causes sick sinus syndrome and early atrial fibrillation. Heart Rhythm 2014; 11:1015-1023. [PMID: 24582607 PMCID: PMC4056672 DOI: 10.1016/j.hrthm.2014.02.021] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Indexed: 01/08/2023]
Abstract
BACKGROUND Mutations in the SCN5A gene, encoding the α subunit of the cardiac Na(+) channel, Nav1.5, can result in several life-threatening arrhythmias. OBJECTIVE To characterize a distal truncating SCN5A mutation, R1860Gfs*12, identified in a family with different phenotypes including sick sinus syndrome, atrial fibrillation (AF), atrial flutter, and atrioventricular block. METHODS Patch-clamp and biochemical analyses were performed in human embryonic kidney 293 cells transfected with wild-type (WT) and/or mutant channels. RESULTS The mutant channel expressed alone caused a 70% reduction in inward sodium current (INa) density compared to WT currents, which was consistent with its partial proteasomal degradation. It also led to a negative shift of steady-state inactivation and to a persistent current. When mimicking the heterozygous state of the patients by coexpressing WT and R1860Gfs*12 channels, the biophysical properties of INa were still altered and the mutant channel α subunits still interacted with the WT channels. Since the proband developed paroxysmal AF at a young age, we screened 17 polymorphisms associated with AF risk in this family and showed that the proband carries at-risk polymorphisms upstream of PITX2, a gene widely associated with AF development. In addition, when mimicking the difference in resting membrane potentials between cardiac atria and ventricles in human embryonic kidney 293 cells or when using computer model simulations, R1860Gfs*12 induced a more drastic decrease in INa at the atrial potential. CONCLUSION We have identified a distal truncated SCN5A mutant associated with gain- and loss-of-function effects, leading to sick sinus syndrome and atrial arrhythmias. A constitutively higher susceptibility to arrhythmias of atrial tissues and genetic variability could explain the complex phenotype observed in this family.
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Affiliation(s)
- Azza Ziyadeh-Isleem
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Jérôme Clatot
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, USA
| | - Sabine Duchatelet
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Estelle Gandjbakhch
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
- AP-HP, Hôpital Pitié-Salpêtrière, Département de Cardiologie, Paris, France
| | - Isabelle Denjoy
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
- AP-HP, Hôpital Bichat, Département de Cardiologie, Centre de Référence des Maladies Cardiaques Héréditaires, Paris, France
| | - Françoise Hidden-Lucet
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
- AP-HP, Hôpital Pitié-Salpêtrière, Département de Cardiologie, Paris, France
| | - Stéphane Hatem
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Isabelle Deschênes
- Heart and Vascular Research Center, MetroHealth Campus, Case Western Reserve University, Cleveland, OH, USA
| | - Alain Coulombe
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Nathalie Neyroud
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Pascale Guicheney
- INSERM, UMR_S1166, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
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Abstract
Loss-of-function gene variants which affect the biophysical properties of ion channel proteins have long been associated with the destabilization of cardiac electrical activity, leading to human arrhythmia and sudden cardiac death. However, recent studies have also demonstrated the importance of ion channel/transporter-anchoring molecules for normal cardiac function. Ankyrins are a family of membrane adaptor proteins whose role in metazoan physiology has been elucidated over the last quarter of a century, but with great strides taken in the last half decade with regard to cardiac cell physiology. The association of dysfunction in ankyrin-based cellular pathways with abnormal human cardiac function represents a surprising turn in the genetics of arrhythmias and sudden cardiac death, demonstrating an exciting new player in the field of 'channelopathies'.
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Affiliation(s)
- Crystal F Kline
- Vanderbilt University School of Medicine, Graduate Program in Pathology, Nashville, TN 37232, USA.
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Chernova AA, Nikulina SI, Tret'iakova SS, Maksimov VN, Voevoda MI, Chernov VN. [Polymorphic alele variants of eNOS gene in patients with disorders of cardiac conduction]. Kardiologiia 2014; 54:26-31. [PMID: 25675717 DOI: 10.18565/cardio.2014.10.26-31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We studied the role of endothelial nitric oxide synthase gene polymorphism 4a/4b in development of such disturbances of cardiac conduction as atrioventricular (AV) block and sick sinus node syndrome (SSNS). We examined 69 subjects (36 men, 33 women) with AV block and 90 subjects (33 men and 57 women) with SSNS. They were divided into groups in dependence on type of conduction disorder and sex. Probands with pathologies studied composed separate groups. All participants underwent included clinical-instrumental cardiological examination and molecular genetic study of eNOS gene polymorphisms. In all groups we revealed significant predominance of a rare homozygous genotype 4b/4b and tendency to decreased number of carriers of widely spread 4a/4a allele.
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Sönmez O, Bacaksız A, Vatankulu MA, Ulucan H, Göktekin O. Familial sick sinus syndrome. Anadolu Kardiyol Derg 2013; 13:727-728. [PMID: 24172807 DOI: 10.5152/akd.2013.248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- Osman Sönmez
- Department of Cardiology, Faculty of Medicine, Bezmialem Vakıf University, İstanbul-Turkey.
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Li X, Zhang J, Cheng R, Jiang Y, Gao F. [A simulation study for the effect of acid concentration and temperture on sick sinus syndrome]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2013; 30:697-703. [PMID: 24059039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The effective therapeutics for the sinoatrial node (SAN) pacemaker dysfunction induced by SCN5A gene mutation this is still being explored recently. In this study, a two-dimensional experimental model of rabbit SAN-atrial cell system which proposed by Zhang et al., was used as a prototype, the gene mutation was considered, and effects of both the acid concentration and temperature were also introduced. The effects of acid concentration and temperature on sick sinus syndrome (SSS) at the tissue level were investigated by simulation. The results showed that the SAN abnormal pacemaker could be caused by the reduction of I(Na), which is induced by the two mutations of T220I and delF1617. The results also showed that if we properly adjusted the acid concentration and temperature of the system, not only could we increase the relevant currents, but also could we increase I(Na) which reduced by gene mutations, so that the pacemaking behavior of SAN tissue could return to normal state from abnormalities. The above simulation results imply that the abnormal pacemaking of SAN system may closely relate to the gene mutation of ion channel mutations, and the acid concentration and temperature may play a modulatory role. Our study could be useful for clinical medical diagnosis and therapy of cardiac disease.
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Affiliation(s)
- Xiang Li
- College of Physics and Electronic Informnation, Anhui Normal University, Wuhu 241000, China
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27
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Chernova AA, Nikulina SI, Tret'iakova SS, Maksimov VN, Voevoda MI, Chernov VN. [α-2β-adrenoreceptor gene polymorphism in patients with disorders of cardiac conduction]. Kardiologiia 2013; 53:45-49. [PMID: 24087960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The article is devoted to the role of insertion-deletion polymorphism of -2-adrenoreceptor gene in development of hereditary disorders of cardiac conduction. We examined 71 patients with atrioventricular blocks and 92 patients with sick sinus node syndrome. Statistically significant preponderance of homozygous genotype DD of ADRA2B gene was found in both groups. Associations of alleles with male or female gender were also revealed.
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Affiliation(s)
- A A Chernova
- Krasnoyarsk State Medical University of prof. V.F. Vojno-Yasenetsky, ul. Partizana Zheleznyaka 1, 660022 Krasnoyarsk, Russia
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Nakajima S, Makiyama T, Hanazawa K, Kaitani K, Amano M, Hayama Y, Onishi N, Tamaki Y, Miyake M, Tamura T, Kondo H, Motooka M, Izumi C, Nakagawa Y, Horie M. A novel SCN5A mutation demonstrating a variety of clinical phenotypes in familial sick sinus syndrome. Intern Med 2013; 52:1805-8. [PMID: 23955615 DOI: 10.2169/internalmedicine.52.0085] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Mutations in SCN5A have been reported to cause several types of hereditary arrhythmias (overlap syndrome). We herein report two patients with the overlapping phenotypes of juvenile sick sinus syndrome (SSS) and Brugada syndrome (BrS). The proband was a man who was in his twenties and had been diagnosed with both SSS and ventricular tachycardia (VT). A pilsicainide challenge test revealed a coved type ST segment elevation. His teenage brother also suffered from SSS, but no VT had been documented. A pilsicainide challenge failed to produce a Brugada-type ST elevation, but there was a marked prolongation of the His-ventricle interval. Their electrocardiograms at rest did not display any Brugada-type ST elevations. We identified a novel SCN5A (F1775Lfs*15) mutation in both patients, even though there was a phenotype discrepancy.
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29
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Chernova AA, Nikulina SI, Tret'iakova SS. [Genetic predictors of sick sinus node syndrome]. Kardiologiia 2013; 53:12-17. [PMID: 23953040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The article is devoted to the role of heredity in development of the sick sinus node syndrome (SSNS). We have examined 14 probands and 110 their relatives from families with idiopathic SSNS and established the role in development of hereditary SSNS of polymorphisms of the following genes: -2-adrenoreceptor, enzyme endothelial NO synthase, protein connexin 40, voltage dependent cardiac sodium channels, cardiac myosin heavy chains. We also revealed associations of clinical variants of idiopathic SSNS with genotypes of the studied genes.
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Chen JY, Liou YM, Wu HDI, Lin KH, Chang KC. Promoter polymorphism G-6A, which modulates angiotensinogen gene expression, is associated with non-familial sick sinus syndrome. PLoS One 2012; 7:e29951. [PMID: 22242192 PMCID: PMC3252346 DOI: 10.1371/journal.pone.0029951] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [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: 09/20/2011] [Accepted: 12/07/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND It is well known that familial sick sinus syndrome (SSS) is caused by functional alterations of ion channels and gap junction. Limited information is available on the mechanism of age-related non-familial SSS. Although evidence shows a close link between arrhythmia and the renin-angiotensin system (RAS), it remains to be determined whether the RAS is involved in the pathogenesis of non-familial SSS. METHODS In this study, 113 patients with documented non-familial SSS and 125 controls were screened for angiotensinogen (AGT) and gap junction protein-connexin 40 (Cx40) promoter polymorphisms by gene sequencing, followed by an association study. A luciferase assay was used to determine the transcriptional activity of the promoter polymorphism. The interaction between nuclear factors and the promoter polymorphism was characterized by an electrophoretic mobility shift assay (EMSA). RESULTS Association study showed the Cx40 -44/+71 polymorphisms are not associated with non-familial SSS; however, it indicated that four polymorphic sites at positions -6, -20, -152, and -217 in the AGT promoter are linked to non-familial SSS. Compared to controls, SSS patients had a lower frequency of the G-6A AA genotype (OR 2.88, 95% CI 1.58-5.22, P = 0.001) and a higher frequency of the G allele at -6 position (OR 2.65, 95% CI 1.54-4.57, P = 0.0003). EMSA and luciferase assays confirmed that nucleotide G at position -6 modulates the binding affinity with nuclear factors and yields a lower transcriptional activity than nucleotide A (P<0.01). CONCLUSION G-6A polymorphism, which modulates the transcriptional activity of the AGT promoter, may contribute to non-familial SSS susceptibility.
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Affiliation(s)
- Jan-Yow Chen
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- Division of Cardiology, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Ying-Ming Liou
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
- * E-mail:
| | - Hong-Dar Isaac Wu
- Department of Applied Mathematics and Institute of Statistics, National Chung Hsing University, Taichung, Taiwan
| | - Kuo-Hung Lin
- Division of Cardiology, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Kuan-Cheng Chang
- Division of Cardiology, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
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33
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Abstract
A new study successfully applies complementary whole-genome sequencing and imputation approaches to establish robust disease associations in an isolated population. This strategy is poised to help elucidate the role of variants at the low end of the allele frequency spectrum in the genetic architecture of complex traits.
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Holm H, Gudbjartsson DF, Sulem P, Masson G, Helgadottir HT, Zanon C, Magnusson OT, Helgason A, Saemundsdottir J, Gylfason A, Stefansdottir H, Gretarsdottir S, Matthiasson SE, Thorgeirsson GM, Jonasdottir A, Sigurdsson A, Stefansson H, Werge T, Rafnar T, Kiemeney LA, Parvez B, Muhammad R, Roden DM, Darbar D, Thorleifsson G, Walters GB, Kong A, Thorsteinsdottir U, Arnar DO, Stefansson K. A rare variant in MYH6 is associated with high risk of sick sinus syndrome. Nat Genet 2011; 43:316-20. [PMID: 21378987 PMCID: PMC3066272 DOI: 10.1038/ng.781] [Citation(s) in RCA: 231] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Accepted: 02/10/2011] [Indexed: 12/16/2022]
Abstract
Through complementary application of SNP genotyping, whole-genome sequencing and imputation in 38,384 Icelanders, we have discovered a previously unidentified sick sinus syndrome susceptibility gene, MYH6, encoding the alpha heavy chain subunit of cardiac myosin. A missense variant in this gene, c.2161C>T, results in the conceptual amino acid substitution p.Arg721Trp, has an allelic frequency of 0.38% in Icelanders and associates with sick sinus syndrome with an odds ratio = 12.53 and P = 1.5 × 10⁻²⁹. We show that the lifetime risk of being diagnosed with sick sinus syndrome is around 6% for non-carriers of c.2161C>T but is approximately 50% for carriers of the c.2161C>T variant.
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Affiliation(s)
- Hilma Holm
- deCODE Genetics, Sturlugata 8, Reykjavik, Iceland.
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Chernova AA, Nikulina SI, Shul'man VA, Kukushkina TS, Voevoda MI, Maksimov VN. [Polymorphism of connexin 40 gene-- a novel genetic marker of the sick sinus node syndrome]. Kardiologiia 2011; 51:17-9. [PMID: 21649591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this work we have demonstrated for the first time on the clinico-genetic material association between hereditary sick sinus node syndrome and connexin 40 gene polymorphism. We have revealed that heterozygous variant of connexin 40 gene variant is more frequent among patients with sick sinus node syndrome and their healthy relatives than in persons of control group.
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Chernova AA, Nikulina SI, Shul'man VA, Kukushkina TS, Voevoda MI, Maksimov VN. [Polymorphisms of 2B-adrenergic receptor and endothelial NO-Synthase genes in genesis of the hereditary sick sinus node syndrome]. Kardiologiia 2011; 51:55-59. [PMID: 21878072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this work we have demonstrated for the first time on the clinico-genetic material association between hereditary sick sinus node syndrome (SSNS) ADRA2B and eNOS genes polymorphisms. We have established predominance of homozygote genotype of more rare DD allele in patients with SSNS (28%) compared with subjects of control group (8.99%). We have found predominance of heterozygote genotype 4a/4b in patients with SSNS compared with subjects of control group (41.8 and 25.39%, respectively). The data obtained allow to suggest that eNOS gene polymorphism might be associated with SSNS.
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Nikulina SI, Shul'man VA, Chernova AA, Voevoda MI, Maksimov VN, Kazarinova IL. [Ser49gly polymorphism as predictor of development of hereditary sick sinus node syndrome]. Kardiologiia 2009; 49:32-34. [PMID: 19845516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We demonstrated for the first time on clinico-genetic material an association of hereditary sick sinus node syndrome (SSNS) with polymorphism of beta-adrenorecetor gene. We found that heterozygous variant of Ser49gly of beta-adrenoreceptor gene was significantly more often met in patients with SSNS and their healthy relatives than in subjects of control group. In the group of patients with SSNS contrary to control group we noted statistically significant preponderance of carriers of mutant Gly49 allele of.
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Zhang Y, Wang T, Ma A, Zhou X, Gui J, Wan H, Shi R, Huang C, Grace AA, Huang CLH, Trump D, Zhang H, Zimmer T, Lei M. Correlations between clinical and physiological consequences of the novel mutation R878C in a highly conserved pore residue in the cardiac Na+ channel. Acta Physiol (Oxf) 2008; 194:311-23. [PMID: 18616619 PMCID: PMC2659387 DOI: 10.1111/j.1748-1716.2008.01883.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [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] [Indexed: 11/30/2022]
Abstract
Aim: We compared the clinical and physiological consequences of the novel mutation R878C in a highly conserved pore residue in domain II (S5-S6) of human, hNav1.5, cardiac Na+ channels. Methods: Full clinical evaluation of pedigree members through three generations of a Chinese family combined with SCN5A sequencing from genomic DNA was compared with patch and voltage-clamp results from two independent expression systems. Results: The four mutation carriers showed bradycardia, and slowed sino-atrial, atrioventricular and intraventricular conduction. Two also showed sick sinus syndrome; two had ST elevation in leads V1 and V2. Unlike WT-hNav1.5, whole-cell patch-clamped HEK293 cells expressing R878C-hNav1.5 showed no detectable Na+ currents (iNa), even with substitution of a similarly charged lysine residue. Voltage-clamped Xenopus oocytes injected with either 0.04 or 1.5 μg μL−1 R878C-hNav1.5 cRNA similarly showed no iNa, yet WT-hNav1.5 cRNA diluted to 0.0004–0.0008 ng μL−1resulted in expression of detectable iNa. iNa was simply determined by the amount of injected WT-hNav1.5: doubling the dose of WT-hNav1.5 cRNA doubled iNa. iNa amplitudes and activation and inactivation characteristics were similar irrespective of whether WT-hNav1.5 cRNA was given alone or combined with equal doses of R878C-hNav1.5 cRNA therefore excluding dominant negative phenotypic effects. Na+ channel function in HEK293 cells transfected with R878C-hNav1.5 was not restored by exposure to mexiletine (200 μm) and lidocaine (100 μm). Fluorescence confocal microscopy using E3-Nav1.5 antibody demonstrated persistent membrane expression of both WT and R878C-hNav1.5. Modelling studies confirmed that such iNa reductions reproduced the SSS phenotype. Conclusion: Clinical consequences of the novel R878C mutation correlate with results of physiological studies.
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Affiliation(s)
- Y Zhang
- Cardiovascular Ion Channel Disease Laboratory, Department of Paediatrics, First Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an, China
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Vitved T, Lianee HT, Støvring B, Sigurd BM, Christiansen M. [Mutations in the heart's pacemaker channels--a new cause of sick sinus node syndrome and long-QT syndrome]. Ugeskr Laeger 2008; 170:929-933. [PMID: 18397618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The sinus node hyperpolarization-activated If current generated by the cardiac pacemaker channels HCN2 and HCN4 determines the autonomous beating of the heart. Cardiac arrhythmias, like long-QT syndrome, are often caused by irregularities of the heart action potential generated by mutations in cardiac ion channel genes. Mutations in the HCN4 gene have been associated with sick sinus syndrome and long-QT syndrome. The identification of cardiac arrhythmia disease-associated genes makes possible new therapeutic strategies based on gene-specific drug treatment and gene therapy.
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Affiliation(s)
- Tine Vitved
- Statens Serum Institut, Klinisk Biokemisk Afdeling, Markørlaboratoriet, DK-2300 København S
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Michielsen P, Martin JJ, Vanagt E, Vrints C, Gillebert T, Snoeck J. Cardiac Involvement in Juvenile Ceroid Lipofuscinosis of the Spielmeyer-Vogt-Sjögren Type: Prospective Noninvasive Findings in Two Siblings. Eur Neurol 2008; 23:166-72. [PMID: 6540681 DOI: 10.1159/000115699] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The results of prospective noninvasive cardiologic investigations, including echocardiography and Holter monitoring are described in 2 siblings with juvenile ceroid lipofuscinosis of the Spielmeyer-Vogt-Sjögren type. In the elder patient, echocardiography revealed ventricular hypertrophy with slowed ventricular relaxation. Holter monitoring showed not only bradycardia but also slow and fast ectopic atrial rhythms, sinus arrests and complex ventricular ectopic activity including ventricular tachycardia. In the younger patient the findings were less severe. These functional disturbances due to cardiac involvement, never reported before in this disease, are discussed.
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Tan BH, Iturralde-Torres P, Medeiros-Domingo A, Nava S, Tester DJ, Valdivia CR, Tusié-Luna T, Ackerman MJ, Makielski JC. A novel C-terminal truncation SCN5A mutation from a patient with sick sinus syndrome, conduction disorder and ventricular tachycardia. Cardiovasc Res 2007; 76:409-17. [PMID: 17897635 PMCID: PMC2100438 DOI: 10.1016/j.cardiores.2007.08.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Revised: 07/24/2007] [Accepted: 08/15/2007] [Indexed: 01/12/2023] Open
Abstract
OBJECTIVES Individual mutations in the SCN5A-encoding cardiac sodium channel alpha-subunit cause single cardiac arrhythmia disorders, but a few cause multiple distinct disorders. Here we report a family harboring an SCN5A mutation (L1821fs/10) causing a truncation of the C-terminus with a marked and complex biophysical phenotype and a corresponding variable and complex clinical phenotype with variable penetrance. METHODS AND RESULTS A 12-year-old male with congenital sick sinus syndrome (SSS), cardiac conduction disorder (CCD), and recurrent monomorphic ventricular tachycardia (VT) had mutational analysis that identified a 4 base pair deletion (TCTG) at position 5464-5467 in exon 28 of SCN5A. The mutation was also present in six asymptomatic family members only two of which showed mild ECG phenotypes. The deletion caused a frame-shift mutation (L1821fs/10) with truncation of the C-terminus after 10 missense amino acid substitutions. When expressed in HEK-293 cells for patch-clamp study, the current density of L1821fs/10 was reduced by 90% compared with WT. In addition, gating kinetic analysis showed a 5-mV positive shift in activation, a 12-mV negative shift of inactivation and enhanced intermediate inactivation, all of which would tend to reduce peak and early sodium current. Late sodium current, however, was increased in the mutated channels. CONCLUSIONS The L1821fs/10 mutation causes the most severe disruption of SCN5A structure for a naturally occurring mutation that still produces current. It has a marked loss-of-function and unique phenotype of SSS, CCD and VT with incomplete penetrance.
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Affiliation(s)
- Bi-Hua Tan
- Department of Medicine, Cardiovascular Section, University of Wisconsin-Madison, WI
| | | | - Argelia Medeiros-Domingo
- Instituto de Investigaciones Biomédicas, UNAM, Instituto Nacional de Ciencias Médicas y Nutrición, SZ, México
- The Departments of Medicine (Division of Cardiovascular Diseases), Pediatrics (Division of Pediatric Cardiology), and Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine, Rochester, MN
| | - Santiago Nava
- Instituto Nacional de Cardiología “Ignacio Chávez”, México
| | - David J Tester
- The Departments of Medicine (Division of Cardiovascular Diseases), Pediatrics (Division of Pediatric Cardiology), and Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine, Rochester, MN
| | - Carmen R. Valdivia
- Department of Medicine, Cardiovascular Section, University of Wisconsin-Madison, WI
| | - Teresa Tusié-Luna
- Instituto de Investigaciones Biomédicas, UNAM, Instituto Nacional de Ciencias Médicas y Nutrición, SZ, México
| | - Michael J. Ackerman
- The Departments of Medicine (Division of Cardiovascular Diseases), Pediatrics (Division of Pediatric Cardiology), and Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine, Rochester, MN
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Meng XY, Huang C, Song TS. [Genetic analysis of the familial noncompaction ventricular myocardium with sick sinus syndrome]. Zhonghua Xin Xue Guan Bing Za Zhi 2007; 35:580-1. [PMID: 17711726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
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Tester DJ, Ackerman MJ. Genetic testing for cardiac channelopathies: ten questions regarding clinical considerations for heart rhythm allied professionals. Heart Rhythm 2005; 2:675-7. [PMID: 15922282 DOI: 10.1016/j.hrthm.2004.09.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2004] [Indexed: 11/28/2022]
Affiliation(s)
- David J Tester
- Department of Medicine, Division of Cardiovascular Diseases, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA
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Affiliation(s)
- Arthur A M Wilde
- Experimental & Molecular Cardiology Group, Academic Medical Center, Amsterdam, The Netherlands.
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Tveskov C, Skytthe A, Arnsbo P, Vaupel JW, Møller M, Christensen K. Twins with implanted pacemakers: Is there an increased mortality risk for the co-twin? A follow-up study based on the Danish Twin Registry and the Danish Pacemaker Register. Europace 2005; 7:598-603. [PMID: 16216763 DOI: 10.1016/j.eupc.2005.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2004] [Accepted: 07/08/2005] [Indexed: 10/25/2022] Open
Abstract
BACKGROUND The main indications for implanting a cardiac pacemaker are either acquired atrio-ventricular block (AVB) or sick sinus syndrome (SSS). In general, the exact aetiology of these conditions is unknown. Genetic factors may play a role. Untreated AVB is associated with increased mortality but SSS seems to have a good prognosis. The present study was designed to assess whether first-degree relatives of these patients have an increased mortality risk. METHODS We investigated the survival pattern of the co-twins of twins who have had a cardiac pacemaker implanted, by linking two nationwide registries in Denmark: the Danish Pacemaker Register and the Danish Twin Registry. For each "pacemaker-twin" four control-twins matched with respect to age, sex, and zygosity were selected among the twins who were alive at the time of the pacemaker implantation. A total of 159 twins with a pacemaker treated bradycardia of unknown aetiology were identified of which 73 had AVB and 64 had SSS. A total of 622 matched control-twins could be identified. The survival from age six of the co-twins of the "pacemaker-twins" was compared with that of the co-twins of the control-twins. The follow-up period ended January 1st, 2000. FINDINGS The survival curves for the co-twins of the "pacemaker-twins" were virtually identical to those of the co-twins of the control-twins. This finding was consistent for both AVB and SSS and for monozygotic as well as dizygotic twins. CONCLUSION No increased mortality risk could be demonstrated for first-degree relatives--including monozygotic twins--of patients with a cardiac pacemaker implanted due to either acquired AVB or SSS.
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Affiliation(s)
- Claus Tveskov
- The Danish Pacemaker Register, Department of Cardiology, Odense University Hospital, DK-5000 Odense C, Denmark.
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Smits JPP, Koopmann TT, Wilders R, Veldkamp MW, Opthof T, Bhuiyan ZA, Mannens MMAM, Balser JR, Tan HL, Bezzina CR, Wilde AAM. A mutation in the human cardiac sodium channel (E161K) contributes to sick sinus syndrome, conduction disease and Brugada syndrome in two families. J Mol Cell Cardiol 2005; 38:969-81. [PMID: 15910881 DOI: 10.1016/j.yjmcc.2005.02.024] [Citation(s) in RCA: 134] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2004] [Revised: 02/04/2005] [Accepted: 02/08/2005] [Indexed: 11/30/2022]
Abstract
BACKGROUND Mutations in the gene encoding the human cardiac sodium channel (SCN5A) have been associated with three distinct cardiac arrhythmia disorders: the long QT syndrome, the Brugada syndrome and cardiac conduction disease. Here we report the biophysical features of a novel sodium channel mutation, E161K, which we identified in individuals of two non-related families with symptoms of bradycardia, sinus node dysfunction, generalized conduction disease and Brugada syndrome, or combinations thereof. METHODS AND RESULTS Wild-type (WT) or E161K sodium channel alpha-subunit and beta-subunit were cotransfected into tsA201 cells to study the functional consequences of mutant sodium channels. Characterization of whole-cell sodium current (I(Na)) using the whole cell patch-clamp technique revealed that the E161K mutation caused an almost threefold reduction in current density (P < 0.001), and an 11.9 mV positive shift of the voltage-dependence of activation (P < 0.0001). The inactivation properties of mutant and WT sodium channels were similar. These results suggest an overall reduction of E161K I(Na). Incorporation of the experimental findings into computational models demonstrate atrial and ventricular conduction slowing as well as a reduction in sinus rate by slowing of the diastolic depolarization rate and upstroke velocity of the sinus node action potential. This reduction in sinus rate was aggravated by application of acetylcholine, simulating the dominant vagal tone during night. CONCLUSION Our experimental and computational analysis of the E161K mutation suggests that a loss of sodium channel function is not only associated with Brugada syndrome and conduction disease, but may also cause sinus node dysfunction in carriers of this mutation.
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Affiliation(s)
- Jeroen P P Smits
- Experimental and Molecular Cardiology Group, Academic Medical Center, University of Amsterdam, The Netherlands
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Abstract
Cardiac rhythm problems result in high levels of morbidity and mortality, with sudden arrhythmic death claiming approximately 300,000 lives in the United States each year. Investigations into the genetic contributions to rhythm and conduction disorders have found genes or loci associated with primary rhythm/conduction disorders such as familial atrial fibrillation and atrio-ventricular block, underscoring the importance of collecting a thorough family history. Combinations of single or multiple genes and environmental risk factors may place only certain family members at risk. Some cardiac muscle problems, such as cardiomyopathy, predispose to arrhythmia and have documented genetic components. Primary health care providers need current knowledge of genetic contributions to rhythm/conduction problems so that family members at risk can be identified early and cared for appropriately. This article provides an overview of the genetic contributions to cardiac rhythm and conduction problems.
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Affiliation(s)
- Theresa Terry Beery
- Institute for Nursing Research, University of Cincinnati, College of Nursing, PO Box 210038, Cincinnati, OH 45221-0038, USA.
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Tomita T, Kinoshita O, Hanaoka T, Kai R, Yokoseki O, Uchikawa SI, Tsutsui H, Yazaki Y, Imamura H, Hongo M, Kubo K. Familial sick sinus syndrome complicated by extensive cardiac conduction disturbance. Int J Cardiol 2004; 94:343-5. [PMID: 15094010 DOI: 10.1016/j.ijcard.2003.04.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2003] [Accepted: 04/12/2003] [Indexed: 10/26/2022]
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Benson DW, Wang DW, Dyment M, Knilans TK, Fish FA, Strieper MJ, Rhodes TH, George AL. Congenital sick sinus syndrome caused by recessive mutations in the cardiac sodium channel gene (SCN5A). J Clin Invest 2003; 112:1019-28. [PMID: 14523039 PMCID: PMC198523 DOI: 10.1172/jci18062] [Citation(s) in RCA: 160] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Sick sinus syndrome (SSS) describes an arrhythmia phenotype attributed to sinus node dysfunction and diagnosed by electrocardiographic demonstration of sinus bradycardia or sinus arrest. Although frequently associated with underlying heart disease and seen most often in the elderly, SSS may occur in the fetus, infant, and child without apparent cause. In this setting, SSS is presumed to be congenital. Based on prior associations with disorders of cardiac rhythm and conduction, we screened the alpha subunit of the cardiac sodium channel (SCN5A) as a candidate gene in ten pediatric patients from seven families who were diagnosed with congenital SSS during the first decade of life. Probands from three kindreds exhibited compound heterozygosity for six distinct SCN5A alleles, including two mutations previously associated with dominant disorders of cardiac excitability. Biophysical characterization of the mutants using heterologously expressed recombinant human heart sodium channels demonstrate loss of function or significant impairments in channel gating (inactivation) that predict reduced myocardial excitability. Our findings reveal a molecular basis for some forms of congenital SSS and define a recessive disorder of a human heart voltage-gated sodium channel.
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Affiliation(s)
- D Woodrow Benson
- Department of Pediatrics, Cincinnati Children's Hospital, Ohio, USA.
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