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van der Voorn SM, van Drie E, Proost V, Dimitrova K, Ernst RF, James CA, Tichnell C, Murray B, Calkins H, Saguner AM, Duru F, Ellinor PT, Bezzina CR, Jurgens SJ, van Tintelen JP, van Veen TAB. Lack of Evidence for the Role of the p.(Ser96Ala) Polymorphism in Histidine-Rich Calcium Binding Protein as a Secondary Hit in Cardiomyopathies. Int J Mol Sci 2023; 24:15931. [PMID: 37958923 PMCID: PMC10648441 DOI: 10.3390/ijms242115931] [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: 09/20/2023] [Revised: 10/17/2023] [Accepted: 11/01/2023] [Indexed: 11/15/2023] Open
Abstract
Inherited forms of arrhythmogenic and dilated cardiomyopathy (ACM and DCM) are characterized by variable disease expression and age-related penetrance. Calcium (Ca2+) is crucially important for proper cardiac function, and dysregulation of Ca2+ homeostasis seems to underly cardiomyopathy etiology. A polymorphism, c.286T>G p.(Ser96Ala), in the gene encoding the histidine-rich Ca2+ binding (HRC) protein, relevant for sarcoplasmic reticulum Ca2+ cycling, has previously been associated with a marked increased risk of life-threatening arrhythmias among idiopathic DCM patients. Following this finding, we investigated whether p.(Ser96Ala) affects major cardiac disease manifestations in carriers of the phospholamban (PLN) c.40_42delAGA; p.(Arg14del) pathogenic variant (cohort 1); patients diagnosed with, or predisposed to, ACM (cohort 2); and DCM patients (cohort 3). We found that the allele frequency of the p.(Ser96Ala) polymorphism was similar across the general European-American population (control cohort, 40.3-42.2%) and the different cardiomyopathy cohorts (cohorts 1-3, 40.9-43.9%). Furthermore, the p.(Ser96Ala) polymorphism was not associated with life-threatening arrhythmias or heart failure-related events across various patient cohorts. We therefore conclude that there is a lack of evidence supporting the important role of the HRC p.(Ser96Ala) polymorphism as a modifier in cardiomyopathy, refuting previous findings. Further research is required to identify bona fide genomic predictors for the stratification of cardiomyopathy patients and their risk for life-threatening outcomes.
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Affiliation(s)
- Stephanie M. van der Voorn
- Department of Medical Physiology, Division Heart & Lungs, University Medical Center Utrecht, 3584 CM Utrecht, The Netherlands (K.D.)
| | - Esmée van Drie
- Department of Genetics, Division Heart & Lungs, University Medical Center Utrecht, 3584 CM Utrecht, The Netherlands
- Netherlands Heart Institute, 3511 EP Utrecht, The Netherlands
| | - Virginnio Proost
- Departments of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Amsterdam University Medical Centers Location Academic Medical Center, 1105 AZ Amsterdam, The Netherlands (C.R.B.)
| | - Kristina Dimitrova
- Department of Medical Physiology, Division Heart & Lungs, University Medical Center Utrecht, 3584 CM Utrecht, The Netherlands (K.D.)
| | | | - Robert F. Ernst
- Department of Genetics, Division Heart & Lungs, University Medical Center Utrecht, 3584 CM Utrecht, The Netherlands
| | - Cynthia A. James
- Department of Medicine, Division Cardiology, Johns Hopkins University, Baltimore, MD 21218, USA (C.T.)
| | - Crystal Tichnell
- Department of Medicine, Division Cardiology, Johns Hopkins University, Baltimore, MD 21218, USA (C.T.)
| | - Brittney Murray
- Department of Medicine, Division Cardiology, Johns Hopkins University, Baltimore, MD 21218, USA (C.T.)
| | - Hugh Calkins
- Department of Medicine, Division Cardiology, Johns Hopkins University, Baltimore, MD 21218, USA (C.T.)
| | - Ardan M. Saguner
- Department of Cardiology, University Heart Center Zurich, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Firat Duru
- Department of Cardiology, University Heart Center Zurich, University Hospital Zurich, 8091 Zurich, Switzerland
- Center for Integrative Human Physiology (ZIHP), University of Zurich, 8091 Zurich, Switzerland
| | - Patrick T. Ellinor
- Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Connie R. Bezzina
- Departments of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Amsterdam University Medical Centers Location Academic Medical Center, 1105 AZ Amsterdam, The Netherlands (C.R.B.)
| | - Sean J. Jurgens
- Departments of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Amsterdam University Medical Centers Location Academic Medical Center, 1105 AZ Amsterdam, The Netherlands (C.R.B.)
- Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - J. Peter van Tintelen
- Department of Genetics, Division Heart & Lungs, University Medical Center Utrecht, 3584 CM Utrecht, The Netherlands
- Netherlands Heart Institute, 3511 EP Utrecht, The Netherlands
| | - Toon A. B. van Veen
- Department of Medical Physiology, Division Heart & Lungs, University Medical Center Utrecht, 3584 CM Utrecht, The Netherlands (K.D.)
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de Brouwer R, Meems LMG, Verstraelen TE, Mahmoud B, Proost V, Wilde AAM, Bosman LP, van Drie E, van der Zwaag PA, van Tintelen JP, Houweling AC, van den Berg MP, de Boer RA. Sex-specific aspects of phospholamban cardiomyopathy: The importance and prognostic value of low-voltage electrocardiograms. Heart Rhythm 2021; 19:427-434. [PMID: 34767988 DOI: 10.1016/j.hrthm.2021.11.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/02/2021] [Accepted: 11/04/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND A pathogenic variant in the gene encoding phospholamban (PLN), a protein that regulates calcium homeostasis of cardiomyocytes, causes PLN cardiomyopathy. It is characterized by a high arrhythmic burden and can progress to severe cardiomyopathy. Risk assessment guides implantable cardioverter-defibrillator therapy and benefits from personalization. Whether sex-specific differences in PLN cardiomyopathy exist is unknown. OBJECTIVE The purpose of this study was to improve the accuracy of PLN cardiomyopathy diagnosis and risk assessment by investigating sex-specific aspects. METHODS We analyzed a multicenter cohort of 933 patients (412 male, 521 female) with the PLN p.(Arg14del) pathogenic variant following up on a recently developed PLN risk model. Sex-specific differences in the incidence of risk model components were investigated: low-voltage electrocardiogram (ECG), premature ventricular contractions, negative T waves, and left ventricular ejection fraction. RESULTS Sustained ventricular arrhythmias (VAs) occurred in 77 males (18.7%) and 61 females (11.7%) (P = .004). Of the 933 cohort members, 287 (31%) had ≥1 low-voltage ECG during follow-up (180 females [63%], 107 males [37%]; P = .006). Female sex, age, age at clinical presentation, and proband status predicted low-voltage ECG during follow-up (area under the curve: 0.78). Sustained VA-free survival was lowest in males with low-voltage ECG (P <.001). CONCLUSION Low-voltage ECGs predict sustained VA and are a component of the PLN risk model. Low-voltage ECGs are more common in females, yet prognostic value is greater in males. Future studies should determine the impact of this difference on the risk prediction of PLN cardiomyopathy and possibly other cardiomyopathies.
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Affiliation(s)
- Remco de Brouwer
- Department of Cardiology, University Medical Centre Groningen, Groningen, The Netherlands; Netherlands Heart Institute, Moreelsepark Utrecht, The Netherlands
| | - Laura M G Meems
- Department of Cardiology, University Medical Centre Groningen, Groningen, The Netherlands
| | - Tom E Verstraelen
- Heart Centre, Department of Cardiology, Amsterdam University Medical Centre, Amsterdam, The Netherlands
| | - Belend Mahmoud
- Department of Cardiology, University Medical Centre Groningen, Groningen, The Netherlands
| | - Virginnio Proost
- Heart Centre, Department of Cardiology, Amsterdam University Medical Centre, Amsterdam, The Netherlands
| | - Arthur A M Wilde
- Heart Centre, Department of Cardiology, Amsterdam University Medical Centre, Amsterdam, The Netherlands
| | - Laurens P Bosman
- Department of Cardiology, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Esmée van Drie
- Department of Genetics, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Paul A van der Zwaag
- Department of Clinical Genetics, University Medical Centre Groningen, Groningen, The Netherlands
| | - J Peter van Tintelen
- Department of Genetics, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Arjan C Houweling
- Department of Clinical Genetics, Amsterdam University Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Maarten P van den Berg
- Department of Cardiology, University Medical Centre Groningen, Groningen, The Netherlands
| | - Rudolf A de Boer
- Department of Cardiology, University Medical Centre Groningen, Groningen, The Netherlands.
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