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Kaviarasan V, Mohammed V, Veerabathiran R. Genetic predisposition study of heart failure and its association with cardiomyopathy. Egypt Heart J 2022; 74:5. [PMID: 35061126 PMCID: PMC8782994 DOI: 10.1186/s43044-022-00240-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 01/12/2022] [Indexed: 12/12/2022] Open
Abstract
Heart failure (HF) is a clinical condition distinguished by structural and functional defects in the myocardium, which genetic and environmental factors can induce. HF is caused by various genetic factors that are both heterogeneous and complex. The incidence of HF varies depending on the definition and area, but it is calculated to be between 1 and 2% in developed countries. There are several factors associated with the progression of HF, ranging from coronary artery disease to hypertension, of which observed the most common genetic cause to be cardiomyopathy. The main objective of this study is to investigate heart failure and its association with cardiomyopathy with their genetic variants. The selected novel genes that have been linked to human inherited cardiomyopathy play a critical role in the pathogenesis and progression of HF. Research sources collected from the human gene mutation and several databases revealed that numerous genes are linked to cardiomyopathy and thus explained the hereditary influence of such a condition. Our findings support the understanding of the genetics aspect of HF and will provide more accurate evidence of the role of changing disease accuracy. Furthermore, a better knowledge of the molecular pathophysiology of genetically caused HF could contribute to the emergence of personalized therapeutics in future.
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Affiliation(s)
- Vaishak Kaviarasan
- Human Cytogenetics and Genomics Laboratory, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, 603103, India
| | - Vajagathali Mohammed
- Human Cytogenetics and Genomics Laboratory, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, 603103, India
| | - Ramakrishnan Veerabathiran
- Human Cytogenetics and Genomics Laboratory, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, 603103, India.
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2
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Lee SH, Hadipour-Lakmehsari S, Kim DH, Di Paola M, Kuzmanov U, Shah S, Lee JJH, Kislinger T, Sharma P, Oudit GY, Gramolini AO. Bioinformatic analysis of membrane and associated proteins in murine cardiomyocytes and human myocardium. Sci Data 2020; 7:425. [PMID: 33262348 PMCID: PMC7708497 DOI: 10.1038/s41597-020-00762-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 11/17/2020] [Indexed: 12/13/2022] Open
Abstract
In the current study we examined several proteomic- and RNA-Seq-based datasets of cardiac-enriched, cell-surface and membrane-associated proteins in human fetal and mouse neonatal ventricular cardiomyocytes. By integrating available microarray and tissue expression profiles with MGI phenotypic analysis, we identified 173 membrane-associated proteins that are cardiac-enriched, conserved amongst eukaryotic species, and have not yet been linked to a 'cardiac' Phenotype-Ontology. To highlight the utility of this dataset, we selected several proteins to investigate more carefully, including FAM162A, MCT1, and COX20, to show cardiac enrichment, subcellular distribution and expression patterns in disease. We performed three-dimensional confocal imaging analysis to validate subcellular localization and expression in adult mouse ventricular cardiomyocytes. FAM162A, MCT1, and COX20 were expressed differentially at the transcriptomic and proteomic levels in multiple models of mouse and human heart diseases and may represent potential diagnostic and therapeutic targets for human dilated and ischemic cardiomyopathies. Altogether, we believe this comprehensive cardiomyocyte membrane proteome dataset will prove instrumental to future investigations aimed at characterizing heart disease markers and/or therapeutic targets for heart failure.
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Affiliation(s)
- Shin-Haw Lee
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, M5G 1M1, Canada
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5S 1M8, Canada
| | - Sina Hadipour-Lakmehsari
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, M5G 1M1, Canada
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5S 1M8, Canada
| | - Da Hye Kim
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, M5G 1M1, Canada
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5S 1M8, Canada
| | - Michelle Di Paola
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, M5G 1M1, Canada
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5S 1M8, Canada
| | - Uros Kuzmanov
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, M5G 1M1, Canada
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5S 1M8, Canada
| | - Saumya Shah
- Department of Medicine, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada
- Mazankowski Alberta Heart Institute, Edmonton, Alberta, T6G 2B7, Canada
| | - Joseph Jong-Hwan Lee
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, M5G 1M1, Canada
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5S 1M8, Canada
| | - Thomas Kislinger
- Princess Margaret Cancer Research Centre, Toronto, Ontario, M5G 1L8, Canada
- Department of Medical Biophysics, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5G 1L7, Canada
| | - Parveen Sharma
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5S 1M8, Canada
- Department of Cardiovascular & Metabolic Medicine, University of Liverpool, Liverpool, L69 3GE, UK
| | - Gavin Y Oudit
- Department of Medicine, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada
- Mazankowski Alberta Heart Institute, Edmonton, Alberta, T6G 2B7, Canada
| | - Anthony O Gramolini
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, M5G 1M1, Canada.
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, M5S 1M8, Canada.
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Fan LL, Liu L, Luo FM, Du R, Wang CY, Dong Y, Liu JS. A novel heterozygous variant of the COL4A4 gene in a Chinese family with hematuria and proteinuria leads to focal segmental glomerulosclerosis and chronic kidney disease. Mol Genet Genomic Med 2020; 8:e1545. [PMID: 33159707 PMCID: PMC7767549 DOI: 10.1002/mgg3.1545] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 09/14/2020] [Accepted: 10/16/2020] [Indexed: 01/15/2023] Open
Abstract
Background Focal segmental glomerulosclerosis (FSGS), as the frequent primary glomerular diseases in adults, accounts for symptomless proteinuria or nephrotic syndrome with or without renal insufficiency. As the crucial lesion of chronic kidney disease (CKD), accumulating evidence from recent studies show that mutations in Collagen‐related genes may be responsible for FSGS. The aim of this study was to identify the genetic lesion of a Chinese family with FSGS and CKD. Methods In this study, we recruited a Han‐Chinese family with unexplained high serum creatinine, hematuria, and proteinuria. Further renal biopsy and renal pathology indicated the diagnosis of FSGS in the proband. Whole‐exome sequencing and Sanger sequencing were employed to explore the pathogenic mutation of this family. Results A novel heterozygous mutation (NM_000092 c.2030G>A, p.G677D) of the collagen type IV alpha‐4 gene (COL4A4) was detected. Co‐segregation analysis revealed that the novel mutation was carried by all the five affected individuals and absent in other healthy members as well as in our 200 local control cohorts. Bioinformatics predication indicated that this novel mutation was pathogenic and may disrupt the structure and function of type IV collagen. Simultaneously, this variant is located in an evolutionarily conserved site of COL4A4 protein. Conclusion Here, we identified a novel mutation of COL4A4 in a family with FSGS and CKD. Our study expanded the variants spectrum of the COL4A4 gene and contributed to the genetic counseling and prenatal genetic diagnosis of the family. In addition, we also recommended the new classification of collagen IV nephropathies, which may be a benefit to the diagnosis, target drug treatment, and management of patients with COL4A3/COL4A4 mutations.
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Affiliation(s)
- Liang-Liang Fan
- Department of Nephrology, The Third Xiangya Hospital of Central South University, Changsha, China.,Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China.,Hunan Key Laboratory of Animal for Human Disease, School of Life Sciences, Central South University, Changsha, China
| | - Lv Liu
- Department of Respiratory Medicine, Diagnosis and Treatment Center of Respiratory Disease, the Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Fang-Mei Luo
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China.,Hunan Key Laboratory of Animal for Human Disease, School of Life Sciences, Central South University, Changsha, China
| | - Ran Du
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China.,Hunan Key Laboratory of Animal for Human Disease, School of Life Sciences, Central South University, Changsha, China
| | - Chen-Yu Wang
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China.,Hunan Key Laboratory of Animal for Human Disease, School of Life Sciences, Central South University, Changsha, China
| | - Yi Dong
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China.,Hunan Key Laboratory of Animal for Human Disease, School of Life Sciences, Central South University, Changsha, China
| | - Ji-Shi Liu
- Department of Nephrology, The Third Xiangya Hospital of Central South University, Changsha, China
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Long Y, Wang L, Li Z. SP1-induced SNHG14 aggravates hypertrophic response in in vitro model of cardiac hypertrophy via up-regulation of PCDH17. J Cell Mol Med 2020; 24:7115-7126. [PMID: 32436661 PMCID: PMC7339172 DOI: 10.1111/jcmm.15073] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/26/2020] [Accepted: 02/04/2020] [Indexed: 12/19/2022] Open
Abstract
Cardiac hypertrophy (CH) is a common cardiac disease and is closely associated with heart failure. Protocadherin 17 (PCDH17) was reported to aggravate myocardial infarction. Present study was designed to illustrate the impact of PCDH17 and the mechanism of PCDH17 expression regulation in CH. CH model in vivo and in vitro was established by transverse aortic constriction (TAC) and Ang‐II treatment. Hypertrophy was evaluated in PMC and H9c2 cells by examining cell surface area and hypertrophic markers. Results demonstrated that PCDH17 was up‐regulated in CH in vivo and in vitro. PCDH17 knock‐down alleviated hypertrophic response in Ang‐II‐induced cardiomyocytes. By means of ENCORI database and a series of mechanism assays, miR‐322‐5p and miR‐384‐5p were identified to interact with and inhibit PCDH17. Next, lncRNA SNHG14 (small nucleolar RNA host gene 14) was validated to sponge both miR‐322‐5p and miR‐384‐5p to elevate PCDH17 level. The subsequent rescue assays revealed that miR‐322‐5p and miR‐384‐5p restored SNHG14 depletion‐mediated suppression on hypertrophy in Ang‐II‐induced cardiomyocytes. Besides, Sp1 transcription factor (SP1) was verified as the transcription factor activating both SNHG14 and PCDH17. Both SNHG14 and PCDH17 reversed SP1 knock‐down‐mediated repression on hypertrophy in Ang‐II‐induced cardiomyocytes. Together, present study first uncovered ceRNA network of SNHG14/miR‐322‐5p/miR‐384‐5p/PCDH17 in Ang‐II‐induced cardiomyocytes.
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Affiliation(s)
- Yadong Long
- Department of Cardiovascular Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Lin Wang
- Department of Cardiovascular Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Zhiqiang Li
- Cardiovascular Surgery II, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
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Abstract
Intercalated discs (ICDs) are highly orchestrated structures that connect neighboring cardiomyocytes in the heart. Three major complexes are distinguished in ICD: desmosome, adherens junction (AJ), and gap junction (GJ). Desmosomes are major cell adhesion junctions that anchor cell membrane to the intermediate filament network; AJs connect the actin cytoskeleton of adjacent cells; and gap junctions metabolically and electrically connect the cytoplasm of adjacent cardiomyocytes. All these complexes work as a single unit, the so-called area composita, interdependently rather than individually. Mutation or altered expression of ICD proteins results in various cardiac diseases, such as ARVC (arrhythmogenic right ventricular cardiomyopathy), dilated cardiomyopathy, and hypotrophy cardiomyopathy, eventually leading to heart failure. In this article, we first review the recent findings on the structural organization of ICD and their functions and then focus on the recent advances in molecular pathogenesis of the ICD-related heart diseases, which include two major areas: i) the ICD gene mutations in cardiac diseases, and ii) the involvement of ICD proteins in signal transduction pathways leading to myocardium remodeling and eventual heart failure. These major ICD-related signaling pathways include Wnt/β-catenin pathway, p38 MAPK cascade, Rho-dependent serum response factor (SRF) signaling, calcineurin/NFAT signaling, Hippo kinase cascade, etc., which are differentially regulated in pathological conditions.
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Brodehl A, Weiss J, Debus JD, Stanasiuk C, Klauke B, Deutsch MA, Fox H, Bax J, Ebbinghaus H, Gärtner A, Tiesmeier J, Laser T, Peterschröder A, Gerull B, Gummert J, Paluszkiewicz L, Milting H. A homozygous DSC2 deletion associated with arrhythmogenic cardiomyopathy is caused by uniparental isodisomy. J Mol Cell Cardiol 2020; 141:17-29. [PMID: 32201174 DOI: 10.1016/j.yjmcc.2020.03.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 02/27/2020] [Accepted: 03/18/2020] [Indexed: 12/21/2022]
Abstract
AIMS We aimed to unravel the genetic, molecular and cellular pathomechanisms of DSC2 truncation variants leading to arrhythmogenic cardiomyopathy (ACM). METHODS AND RESULTS We report a homozygous 4-bp DSC2 deletion variant c.1913_1916delAGAA, p.Q638LfsX647hom causing a frameshift carried by an ACM patient. Whole exome sequencing and comparative genomic hybridization analysis support a loss of heterozygosity in a large segment of chromosome 18 indicating segmental interstitial uniparental isodisomy (UPD). Ultrastructural analysis of the explanted myocardium from a mutation carrier using transmission electron microscopy revealed a partially widening of the intercalated disc. Using qRT-PCR we demonstrated that DSC2 mRNA expression was substantially decreased in the explanted myocardial tissue of the homozygous carrier compared to controls. Western blot analysis revealed absence of both full-length desmocollin-2 isoforms. Only a weak expression of the truncated form of desmocollin-2 was detectable. Immunohistochemistry showed that the truncated form of desmocollin-2 did not localize at the intercalated discs. In vitro, transfection experiments using induced pluripotent stem cell derived cardiomyocytes and HT-1080 cells demonstrated an obvious absence of the mutant truncated desmocollin-2 at the plasma membrane. Immunoprecipitation in combination with fluorescence measurements and Western blot analyses revealed an abnormal secretion of the truncated desmocollin-2. CONCLUSION In summary, we unraveled segmental UPD as the likely genetic reason for a small homozygous DSC2 deletion. We conclude that a combination of nonsense mediated mRNA decay and extracellular secretion is involved in DSC2 related ACM.
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Affiliation(s)
- Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany.
| | - Jürgen Weiss
- Institute for Clinical Biochemistry and Pathobiochemistry, Cellular Morphology, German Diabetes Center, Auf'm Hennekamp 65, 40225 Düsseldorf, Germany
| | - Jana Davina Debus
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Caroline Stanasiuk
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Bärbel Klauke
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Marcus André Deutsch
- Department of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Henrik Fox
- Department of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Jördis Bax
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Hans Ebbinghaus
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Anna Gärtner
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Jens Tiesmeier
- Hospital Luebbecke-Rhaden, Muehlenkreis Hospitalsd, Medical-Campus OWL of the Ruhr-University Bochum, Virchowstr. 65, 32132 Luebbecke, Germany
| | - Thorsten Laser
- Center for Congenital Heart Defects, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Andreas Peterschröder
- Institute for Radiology, Nuclear Medicine and Molecular Imaging, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Brenda Gerull
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada; Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Germany
| | - Jan Gummert
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany; Department of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Lech Paluszkiewicz
- Department of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany.
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Hamada Y, Yamamoto T, Nakamura Y, Sufu-Shimizu Y, Nanno T, Fukuda M, Ono M, Oda T, Okuda S, Ueyama T, Kobayashi S, Yano M. G790del mutation in DSC2 alone is insufficient to develop the pathogenesis of ARVC in a mouse model. Biochem Biophys Rep 2020; 21:100711. [PMID: 31872082 PMCID: PMC6909225 DOI: 10.1016/j.bbrep.2019.100711] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 11/19/2019] [Accepted: 11/21/2019] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited heart disease that causes heart failure and/or sudden cardiac death. Several desmosomal genes (DSC2, PKG, PKP2, DSP, and RyR2) are thought to be the causative gene involved in ARVC. Out of them, DSC2 mutations account for 2% of ARVC genetic abnormalities. This study aimed to clarify the effect of G790del mutation in DSC2 on the arrhythmogenic mechanism and cardiac function in a mouse model. RESULT Neither the heterozygous +/G790del nor homozygous G790del/G790del mice showed structural and functional defects in the right ventricle (RV) or lethal arrhythmia. The homozygous G790del/G790del 6-month-old mice slightly showed left ventricular (LV) dysfunction. Cell shortening decreased with prolongation of intracellular Ca2+ transient in cardiomyocytes isolated from the homozygous G790del/G790del mice, and spontaneous Ca2+ transients were frequently observed in response to isoproterenol. CONCLUSIONS G790del mutation in DSC2 was not relevant to the pathogenesis of ARVC, but showed a slight contractile dysfunction and Ca2+ dysregulation in the LV.
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Affiliation(s)
- Yoriomi Hamada
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Takeshi Yamamoto
- Faculty of Health Sciences, Yamaguchi University Graduate School of Medicine, Japan
| | - Yoshihide Nakamura
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Yoko Sufu-Shimizu
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Takuma Nanno
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Masakazu Fukuda
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Makoto Ono
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Tesuro Oda
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Shinichi Okuda
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Takeshi Ueyama
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Shigeki Kobayashi
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
| | - Masafumi Yano
- Department of Medicine and Clinical Science, Division of Cardiology, Yamaguchi University Graduate School of Medicine, Japan
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8
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Fan LL, Ding DB, Huang H, Chen YQ, Jin JY, Xia K, Xiang R. A de novo mutation of SMYD1 (p.F272L) is responsible for hypertrophic cardiomyopathy in a Chinese patient. Clin Chem Lab Med 2019; 57:532-539. [PMID: 30205637 DOI: 10.1515/cclm-2018-0578] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 08/09/2018] [Indexed: 11/15/2022]
Abstract
Background Hypertrophic cardiomyopathy (HCM) is a serious disorder and one of the leading causes of mortality worldwide. HCM is characterized as left ventricular hypertrophy in the absence of any other loading conditions. In previous studies, mutations in at least 50 genes have been identified in HCM patients. Methods In this research, the genetic lesion of an HCM patient was identified by whole exome sequencing. Real-time polymerase chain reaction (PCR), immunofluorescence and Western blot were used to analyze the effects of the identified mutation. Results According to whole exome sequencing, we identified a de novo mutation (c.814T>C/p.F272L) of SET and MYND domain containing histone methyltransferase 1 (SMYD1) in a Chinese patient with HCM exhibiting syncope. We then generated HIS-SMYD1-pcDNA3.1+ (WT and c.814T>C/p.F272L) plasmids for transfection into AC16 cells to functionalize the mutation. The immunofluorescence experiments indicated that this mutation may block the SMYD1 protein from entering the nucleus. Both Western blot and real-time PCR revealed that, compared with cells transfected with WT plasmids, the expression of HCM-associated genes such as β-myosin heavy chains, SMYD1 chaperones (HSP90) and downstream targets including TGF-β were all disrupted in cells transfected with the mutant plasmid. Previous studies have demonstrated that SMYD1 plays a crucial role in sarcomere organization and heart development. Conclusions This novel mutation (c.814T>C/p.F272L) may be the first identified disease-causing mutation of SMYD1 in HCM patients worldwide. Our research expands the spectrum of HCM-causing genes and contributes to genetic counseling for HCM patients.
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Affiliation(s)
- Liang-Liang Fan
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, P.R. China
| | - Dong-Bo Ding
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, P.R. China
| | - Hao Huang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, P.R. China
| | - Ya-Qin Chen
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, P.R. China
| | - Jie-Yuan Jin
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, P.R. China
| | - Kun Xia
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, P.R. China
| | - Rong Xiang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, P.R. China.,Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, P.R. China
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Whole-Exome Sequencing Identified a De Novo Mutation of Junction Plakoglobin (p.R577C) in a Chinese Patient with Arrhythmogenic Right Ventricular Cardiomyopathy. BIOMED RESEARCH INTERNATIONAL 2019; 2019:9103860. [PMID: 31275992 PMCID: PMC6558630 DOI: 10.1155/2019/9103860] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/21/2019] [Accepted: 04/28/2019] [Indexed: 11/18/2022]
Abstract
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a rare and potentially life-threatening disorder of the heart. The clinical spectrum of ARVC includes myocyte loss and fibro-fatty tissue replacement. With the progress of ARVC, the patient can present serious ventricular arrhythmias, heart failure, and even sudden cardiac death. Previous studies have demonstrated that desmosomes and intermediate junctions play a crucial role in the generation and development of ARVC. In this study, we enrolled a Chinese patient with suspicious ARVC. The patient suffered from right ventricular enlargement and less thickening of right ventricular wall. ECG record showed an epsilon wave. However, there was no obvious symptom in his parents. After whole-exome sequencing and data filtering, we identified a de novo mutation (c.1729C>T/p.R577C) of junction plakoglobin (JUP) in this patient. Bioinformatics programs predicted that this mutation was deleterious. Western blot revealed that, compared to cells transfected with WT plasmids, the expressions of desmoglein 2 (DSG2) and Connexin 43 were decreased overtly in cells transfected with the mutant plasmid. Previous studies have proven that the reduction of DSG2 and Connexin 43 may disturb the stability of desmosomes. In this research, we reported a novel de novo mutation (c.1729C>T/p.R577C) of JUP in a Chinese patient with suspicious ARVC. Functional research further confirmed the pathogenicity of this novel mutation. Our study expanded the spectrum of JUP mutations and may contribute to the genetic diagnosis and counseling of patients with ARVC.
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Fan LL, Liu JS, Huang H, Du R, Xiang R. Whole exome sequencing identified a novel mutation (p.Ala1884Pro) of β-spectrin in a Chinese family with hereditary spherocytosis. J Gene Med 2019; 21:e3073. [PMID: 30690801 DOI: 10.1002/jgm.3073] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/06/2018] [Accepted: 01/07/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Hereditary spherocytosis (HS) is an inherited disorder of erythrocyte. The typical feature of HS is the presence of spherical-shaped erythrocytes on the peripheral blood smear. According to previous studies, more than five candidate genes, such as ANK1, SPTB, SPTA1, SLC4A1 and EPB42 have been identified in HS patients. METHODS In the present study, a Chinese HS family was investigated. The proband suffered from pathologic jaundice and splenomegaly. A blood test and peripheral blood smear experiment further confirmed the diagnosis of HS. We selected the proband to perform the whole exome sequencing. RESULTS After data filtering and co-segregation analysis, we identified 12 mutations in affected members that were absent in healthy members. In consideration of the inheritance pattern, Online Mendelian Inheritance in Man clinical phenotypes, Toppgene function and American College of Medical Genetics classification, we considered the novel mutation (c.5650G > C/p.Ala1884Pro) of β-spectrin (SPTB) to be the genetic lesion in this family. The novel mutation, resulting in a substitution of alanine by proline, may lead to transformation of the SPTB protein structure, which affects the binding between SPTB and ankyrin. CONCLUSIONS The present study confirmed the hereditary red blood cell membrane disorders at a molecular level and expanded the spectrum of SPTB mutations. This may contribute to the clinical management and genetic counseling with respect to HS.
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Affiliation(s)
- Liang-Liang Fan
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China
| | - Ji-Shi Liu
- Department of Nephrology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Hao Huang
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China
| | - Ran Du
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China
| | - Rong Xiang
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha, China.,Department of Nephrology, The Third Xiangya Hospital of Central South University, Changsha, China
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Ding DB, Fan LL, Xiao Z, Huang H, Chen YQ, Guo S, Liu ZH, Xiang R. A novel mutation of dipeptidyl aminopeptidase-like protein-6 in a family with suspicious idiopathic ventricular fibrillation. QJM 2018; 111:373-377. [PMID: 29474731 DOI: 10.1093/qjmed/hcy033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Sudden cardiac death (SCD) occurs in a broad spectrum of cardiac pathologies and is an important cause of mortality in the general population. Idiopathic ventricular fibrillation (IVF) is a rare but important factor resulting in SCD. It is diagnosed in a resuscitated cardiac arrest victim underlying unknown cause, with documented ventricular fibrillation. Previous studies have demonstrated that mutations in dipeptidyl aminopeptidase-like protein-6 (DPP6) and cardiac sodium channel Nav1.5 (SCN5A) are the most important genetic factors involve in IVF. AIM By using whole sequencing to identify the genetic lesion of a family with suspicious idiopathic ventricular fibrillation. DESIGN Prospective genetic study. METHODS In this study, we employed whole-exome sequencing in combination with arrhythmia-related gene filtering to identify the genetic lesion for a family suffering from suspicious IVF, syncope and SCD. We then generated the plasmids of DPP6-pcDNA3.1+ (WT and c.1578G>C/p.Q526H). Kv4.3-pcDNA3.1+ was co-transfected together with/without DPP6-pcDNA3.1+ (WT and/or c.1578G>C/p.Q526H) into HEK293 cells to perform the patch clamp experiments. RESULTS A novel missense mutation (c.1578G>C/p.Q526H) of DPP6 was identified and co-segregated with affected patients in this family. Patch clamp experiments suggested that this novel mutation might result in a gain of function and disturb the efflux of potassium ion. CONCLUSION Our study not only reported the second missense mutation of DPP6 in heart disease and expanded the spectrum of DPP6 mutations, but also contribute to the genetic diagnosis and counseling of families with suspicious IVF, syncope and SCD.
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Affiliation(s)
- D-B Ding
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
| | - L-L Fan
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
| | - Z Xiao
- National and Local Joint Engineering Laboratory for Animal Peptide Drug development, College of Life Sciences, Hunan Normal University, Changsha 410011, China
| | - H Huang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
| | - Y-Q Chen
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - S Guo
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
| | - Z-H Liu
- National and Local Joint Engineering Laboratory for Animal Peptide Drug development, College of Life Sciences, Hunan Normal University, Changsha 410011, China
| | - R Xiang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha 410011, China
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12
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Fan LL, Huang H, Jin JY, Li JJ, Chen YQ, Zhao SP, Xiang R. Whole exome sequencing identifies a novel mutation (c.333 + 2T > C) of TNNI3K in a Chinese family with dilated cardiomyopathy and cardiac conduction disease. Gene 2018; 648:63-67. [PMID: 29355681 DOI: 10.1016/j.gene.2018.01.055] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/02/2018] [Accepted: 01/16/2018] [Indexed: 12/27/2022]
Abstract
Dilated Cardiomyopathy (DCM) and cardiac conduction disease (CCD) are two kinds if diseases that can induce heart failure, syncope and even sudden cardiac death (SCD). DCM patients can experience CCD at the same time. In recent research, some disease-causing genes and variants have been identified in patients with DCM and CCD, such as Alpha-Actinin-2 and TNNI3 Interacting Kinase (TNNI3K). In this study, we employed whole-exome sequencing (WES) to explore the potential causative genes in a Chinese family with DCM and CCD. A novel splice site mutation (c.333 + 2 T > C) of TNNI3K was identified and co-segregated with the affected family members. This novel mutation was also absent in 200 healthy local controls and predicted to be disease-causing by Mutationtaster. The splice site mutation (c.333 + 2 T > C) may result in a premature stop codon in exon 4 of the TNNI3K gene and can induce nonsense-mediated mRNA decay. Real-time qPCR also confirmed that the level of TNNI3K mRNA expression was decreased significantly compared with the controls, which may lead to myocardial structural disorder and arrhythmia. In this study we reported the third novel mutation of TNNI3K in DCM and CCD patients which further supported the important role of TNNI3K in heart development and expanded the spectrum of TNNI3K mutations. The results may contribute to the genetic diagnosis and counseling of families with DCM and CCD.
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Affiliation(s)
- Liang-Liang Fan
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha 410013, China
| | - Hao Huang
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha 410013, China
| | - Jie-Yuan Jin
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha 410013, China
| | - Jing-Jing Li
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha 410013, China
| | - Ya-Qin Chen
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, 410011, China
| | - Shui-Ping Zhao
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, 410011, China
| | - Rong Xiang
- Department of Cell Biology, The School of Life Sciences, Central South University, Changsha 410013, China; Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, 410011, China.
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