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Arif M, Nabavizadeh P, Song T, Desai D, Singh R, Bazrafshan S, Kumar M, Wang Y, Gilbert RJ, Dhandapany PS, Becker RC, Kranias EG, Sadayappan S. Genetic, clinical, molecular, and pathogenic aspects of the South Asian-specific polymorphic MYBPC3 Δ25bp variant. Biophys Rev 2020; 12:1065-1084. [PMID: 32656747 PMCID: PMC7429610 DOI: 10.1007/s12551-020-00725-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 07/03/2020] [Indexed: 02/06/2023] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is a cardiac genetic disease characterized by ventricular enlargement, diastolic dysfunction, and increased risk for sudden cardiac death. Sarcomeric genetic defects are the predominant known cause of HCM. In particular, mutations in the myosin-binding protein C gene (MYBPC3) are associated with ~ 40% of all HCM cases in which a genetic basis has been established. A decade ago, our group reported a 25-base pair deletion in intron 32 of MYBPC3 (MYBPC3Δ25bp) that is uniquely prevalent in South Asians and is associated with autosomal dominant cardiomyopathy. Although our studies suggest that this deletion results in left ventricular dysfunction, cardiomyopathies, and heart failure, the precise mechanism by which this variant predisposes to heart disease remains unclear. Increasingly appreciated, however, is the contribution of secondary risk factors, additional mutations, and lifestyle choices in augmenting or modifying the HCM phenotype in MYBPC3Δ25bp carriers. Therefore, the goal of this review article is to summarize the current research dedicated to understanding the molecular pathophysiology of HCM in South Asians with the MYBPC3Δ25bp variant. An emphasis is to review the latest techniques currently applied to explore the MYBPC3Δ25bp pathogenesis and to provide a foundation for developing new diagnostic strategies and advances in therapeutics.
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Affiliation(s)
- Mohammed Arif
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA.
| | - Pooneh Nabavizadeh
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA
| | - Taejeong Song
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA
| | - Darshini Desai
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA
| | - Rohit Singh
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA
| | - Sholeh Bazrafshan
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA
| | - Mohit Kumar
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA
| | - Yigang Wang
- Department of Pathology and Laboratory Medicine, University of Cincinnati, College of Medicine, Cincinnati, OH, 45267, USA
| | - Richard J Gilbert
- Research Service, Providence VA Medical Center, Providence, RI, 02908, USA
| | - Perundurai S Dhandapany
- Centre for Cardiovascular Biology and Disease, Institute for Stem Cell Biology and Regenerative Medicine (inStem), Bangalore, India
- The Knight Cardiovascular Institute, Oregon Health and Science University, Portland, OR, USA
- Department of Medicine, Oregon Health and Science University, Portland, OR, USA
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Portland, OR, USA
| | - Richard C Becker
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA
| | - Evangelia G Kranias
- Department of Pharmacology and Systems Physiology, University of Cincinnati, College of Medicine, Cincinnati, OH, 45267, USA
| | - Sakthivel Sadayappan
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267-0575, USA
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Harper AR, Bowman M, Hayesmoore JBG, Sage H, Salatino S, Blair E, Campbell C, Currie B, Goel A, McGuire K, Ormondroyd E, Sergeant K, Waring A, Woodley J, Kramer CM, Neubauer S, Farrall M, Watkins H, Thomson KL. Reevaluation of the South Asian MYBPC3Δ25bp Intronic Deletion in Hypertrophic Cardiomyopathy. CIRCULATION-GENOMIC AND PRECISION MEDICINE 2020; 13:e002783. [PMID: 32163302 PMCID: PMC7299222 DOI: 10.1161/circgen.119.002783] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Supplemental Digital Content is available in the text. The common intronic deletion, MYBPC3Δ25, detected in 4% to 8% of South Asian populations, is reported to be associated with cardiomyopathy, with ≈7-fold increased risk of disease in variant carriers. Here, we examine the contribution of MYBPC3Δ25 to hypertrophic cardiomyopathy (HCM) in a large patient cohort.
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Affiliation(s)
- Andrew R Harper
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Wellcome Centre for Human Genetics, Oxford, United Kingdom (A.R.H., S.S., A.G., A.W., M.F., H.W., K.L.T.)
| | - Michael Bowman
- Oxford Medical Genetics Laboratories, Churchill Hospital, Oxford, United Kingdom (M.B., J.B.G.H., H.S., C.C., B.C., K.M., K.S., K.L.T.)
| | - Jesse B G Hayesmoore
- Oxford Medical Genetics Laboratories, Churchill Hospital, Oxford, United Kingdom (M.B., J.B.G.H., H.S., C.C., B.C., K.M., K.S., K.L.T.)
| | - Helen Sage
- Oxford Medical Genetics Laboratories, Churchill Hospital, Oxford, United Kingdom (M.B., J.B.G.H., H.S., C.C., B.C., K.M., K.S., K.L.T.)
| | - Silvia Salatino
- Wellcome Centre for Human Genetics, Oxford, United Kingdom (A.R.H., S.S., A.G., A.W., M.F., H.W., K.L.T.)
| | - Edward Blair
- Oxford Centre for Genomic Medicine, Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom (E.B.)
| | - Carolyn Campbell
- Oxford Medical Genetics Laboratories, Churchill Hospital, Oxford, United Kingdom (M.B., J.B.G.H., H.S., C.C., B.C., K.M., K.S., K.L.T.)
| | - Bethany Currie
- Oxford Medical Genetics Laboratories, Churchill Hospital, Oxford, United Kingdom (M.B., J.B.G.H., H.S., C.C., B.C., K.M., K.S., K.L.T.)
| | - Anuj Goel
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Wellcome Centre for Human Genetics, Oxford, United Kingdom (A.R.H., S.S., A.G., A.W., M.F., H.W., K.L.T.)
| | - Karen McGuire
- Oxford Medical Genetics Laboratories, Churchill Hospital, Oxford, United Kingdom (M.B., J.B.G.H., H.S., C.C., B.C., K.M., K.S., K.L.T.)
| | - Elizabeth Ormondroyd
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.)
| | - Kate Sergeant
- Oxford Medical Genetics Laboratories, Churchill Hospital, Oxford, United Kingdom (M.B., J.B.G.H., H.S., C.C., B.C., K.M., K.S., K.L.T.)
| | - Adam Waring
- Wellcome Centre for Human Genetics, Oxford, United Kingdom (A.R.H., S.S., A.G., A.W., M.F., H.W., K.L.T.)
| | - Jessica Woodley
- West Midlands Regional Genetics Laboratory, Birmingham Woman's and Children's NHS Foundation Trust, Birmingham, United Kingdom (J.W.)
| | | | - Stefan Neubauer
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.)
| | - Martin Farrall
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Wellcome Centre for Human Genetics, Oxford, United Kingdom (A.R.H., S.S., A.G., A.W., M.F., H.W., K.L.T.)
| | - Hugh Watkins
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Wellcome Centre for Human Genetics, Oxford, United Kingdom (A.R.H., S.S., A.G., A.W., M.F., H.W., K.L.T.)
| | - Kate L Thomson
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford, United Kingdom (A.R.H., A.G., E.O., S.N., M.F., H.W., K.L.T.).,Wellcome Centre for Human Genetics, Oxford, United Kingdom (A.R.H., S.S., A.G., A.W., M.F., H.W., K.L.T.).,Oxford Medical Genetics Laboratories, Churchill Hospital, Oxford, United Kingdom (M.B., J.B.G.H., H.S., C.C., B.C., K.M., K.S., K.L.T.)
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Tabish AM, Arif M, Song T, Elbeck Z, Becker RC, Knöll R, Sadayappan S. Association of intronic DNA methylation and hydroxymethylation alterations in the epigenetic etiology of dilated cardiomyopathy. Am J Physiol Heart Circ Physiol 2019; 317:H168-H180. [PMID: 31026178 PMCID: PMC6692731 DOI: 10.1152/ajpheart.00758.2018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 04/15/2019] [Accepted: 04/22/2019] [Indexed: 01/03/2023]
Abstract
In this study, we investigated the role of DNA methylation [5-methylcytosine (5mC)] and 5-hydroxymethylcytosine (5hmC), epigenetic modifications that regulate gene activity, in dilated cardiomyopathy (DCM). A MYBPC3 mutant mouse model of DCM was compared with wild type and used to profile genomic 5mC and 5hmC changes by Chip-seq, and gene expression levels were analyzed by RNA-seq. Both 5mC-altered genes (957) and 5hmC-altered genes (2,022) were identified in DCM hearts. Diverse gene ontology and KEGG pathways were enriched for DCM phenotypes, such as inflammation, tissue fibrosis, cell death, cardiac remodeling, cardiomyocyte growth, and differentiation, as well as sarcomere structure. Hierarchical clustering of mapped genes affected by 5mC and 5hmC clearly differentiated DCM from wild-type phenotype. Based on these data, we propose that genomewide 5mC and 5hmC contents may play a major role in DCM pathogenesis. NEW & NOTEWORTHY Our data demonstrate that development of dilated cardiomyopathy in mice is associated with significant epigenetic changes, specifically in intronic regions, which, when combined with gene expression profiling data, highlight key signaling pathways involved in pathological cardiac remodeling and heart contractile dysfunction.
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Affiliation(s)
- Ali M Tabish
- Integrated Cardio-Metabolic Centre, Karolinska Institutet , Stockholm , Sweden
| | - Mohammed Arif
- Heart, Lung, Vascular Institute, Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati , Cincinnati, Ohio
| | - Taejeong Song
- Heart, Lung, Vascular Institute, Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati , Cincinnati, Ohio
| | - Zaher Elbeck
- Integrated Cardio-Metabolic Centre, Karolinska Institutet , Stockholm , Sweden
| | - Richard C Becker
- Heart, Lung, Vascular Institute, Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati , Cincinnati, Ohio
| | - Ralph Knöll
- Integrated Cardio-Metabolic Centre, Karolinska Institutet , Stockholm , Sweden
- Cardiovascular and Metabolic Disease Innovative Medicines and Early Development Unit, AstraZeneca R&D, Gothenburg , Sweden
| | - Sakthivel Sadayappan
- Heart, Lung, Vascular Institute, Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati , Cincinnati, Ohio
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