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Abdelfatah N, Chen R, Duff HJ, Seifer CM, Buffo I, Huculak C, Clarke S, Clegg R, Jassal DS, Gordon PMK, Ober C, Frosk P, Gerull B. Characterization of a Unique Form of Arrhythmic Cardiomyopathy Caused by Recessive Mutation in LEMD2. JACC Basic Transl Sci 2019; 4:204-221. [PMID: 31061923 PMCID: PMC6488817 DOI: 10.1016/j.jacbts.2018.12.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 11/02/2018] [Accepted: 12/03/2018] [Indexed: 02/08/2023]
Abstract
Nuclear envelope proteins have been shown to play an important role in the pathogenesis of inherited dilated cardiomyopathy. Here, we present a remarkable cardiac phenotype caused by a homozygous LEMD2 mutation in patients of the Hutterite population with juvenile cataract. Mutation carriers develop arrhythmic cardiomyopathy with mild impairment of left ventricular systolic function but severe ventricular arrhythmias leading to sudden cardiac death. Affected cardiac tissue from a deceased patient and fibroblasts exhibit elongated nuclei with abnormal condensed heterochromatin at the periphery. The patient fibroblasts demonstrate cellular senescence and reduced proliferation capacity, which may suggest an involvement of LEM domain containing protein 2 in chromatin remodeling processes and premature aging.
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Key Words
- ACM, arrhythmogenic cardiomyopathy
- BANF, barrier to autointegration factor
- CMR, cardiac magnetic resonance
- DAPI, 4′,6′-diamidino-2-phenylindole
- DCM, dilated cardiomyopathy
- DNA, deoxyribonucleic acid
- EMD, emerin
- ICD, implantable cardioverter-defibrillator
- LEMD2
- LEMD2, LEM domain containing protein 2
- LGE, late gadolinium enhancement
- LMNA, lamin A/C
- LV, left ventricular
- NE, nuclear envelope
- P, passage
- PBS, phosphate-buffered saline
- SAHF, senescence-associated heterochromatin foci
- SNV, single nucleotide variant
- chromatin remodeling
- dilated cardiomyopathy
- eGFP, enhanced green fluorescent protein
- inner nuclear membrane
- sudden death
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Affiliation(s)
- Nelly Abdelfatah
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Ruping Chen
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany
| | - Henry J Duff
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Colette M Seifer
- Section of Cardiology, Department of Internal Medicine, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Ilan Buffo
- Variety Children's Heart Centre, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Cathleen Huculak
- Department of Medical Genetics, Alberta Health Services, Calgary, Alberta, Canada
| | - Stephanie Clarke
- Department of Biochemistry and Medical Genetics, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Robin Clegg
- Department of Pediatrics, University of Calgary, Calgary, Alberta, Canada
| | - Davinder S Jassal
- Section of Cardiology, Department of Internal Medicine, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Paul M K Gordon
- Cumming School of Medicine Centre for Health Genomics and Informatics, University of Calgary, Calgary, Alberta, Canada
| | - Carole Ober
- Department of Human Genetics, The University of Chicago, Chicago, Illinois
| | | | - Patrick Frosk
- Department of Biochemistry and Medical Genetics, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.,Department of Pediatrics and Child Health, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Brenda Gerull
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany.,Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
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