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Jansen M, Schmidt AF, Jans JJM, Christiaans I, van der Crabben SN, Hoedemaekers YM, Dooijes D, Jongbloed JDH, Boven LG, Lekanne Deprez RH, Wilde AAM, van der Velden J, de Boer RA, van Tintelen JP, Asselbergs FW, Baas AF. Circulating Acylcarnitines Associated with Hypertrophic Cardiomyopathy Severity: an Exploratory Cross-Sectional Study in MYBPC3 Founder Variant Carriers. J Cardiovasc Transl Res 2023; 16:1267-1275. [PMID: 37278928 PMCID: PMC10721678 DOI: 10.1007/s12265-023-10398-2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 05/10/2023] [Indexed: 06/07/2023]
Abstract
Hypertrophic cardiomyopathy (HCM) is a relatively common genetic heart disease characterised by myocardial hypertrophy. HCM can cause outflow tract obstruction, sudden cardiac death and heart failure, but severity is highly variable. In this exploratory cross-sectional study, circulating acylcarnitines were assessed as potential biomarkers in 124 MYBPC3 founder variant carriers (59 with severe HCM, 26 with mild HCM and 39 phenotype-negative [G + P-]). Elastic net logistic regression identified eight acylcarnitines associated with HCM severity. C3, C4, C6-DC, C8:1, C16, C18 and C18:2 were significantly increased in severe HCM compared to G + P-, and C3, C6-DC, C8:1 and C18 in mild HCM compared to G + P-. In multivariable linear regression, C6-DC and C8:1 correlated to log-transformed maximum wall thickness (coefficient 5.01, p = 0.005 and coefficient 0.803, p = 0.007, respectively), and C6-DC to log-transformed ejection fraction (coefficient -2.50, p = 0.004). Acylcarnitines seem promising biomarkers for HCM severity, however prospective studies are required to determine their prognostic value.
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Affiliation(s)
- Mark Jansen
- Department of Genetics, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands.
- Department of Cardiology, University Medical Center Utrecht, Utrecht University, Internal Mail No HTx Secr. (E03.511), Postbus 85500, 3508 GA, Utrecht, the Netherlands.
- Netherlands Heart Institute, Utrecht, the Netherlands.
- , .
| | - A F Schmidt
- Department of Cardiology, University Medical Center Utrecht, Utrecht University, Internal Mail No HTx Secr. (E03.511), Postbus 85500, 3508 GA, Utrecht, the Netherlands
- Institute of Cardiovascular Science, Faculty of Population Health Sciences, University College London, London, UK
- Department of Cardiology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, Amsterdam, the Netherlands
| | - J J M Jans
- Department of Genetics, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - I Christiaans
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - S N van der Crabben
- Department of Human Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Y M Hoedemaekers
- Department of Cardiology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Department of Clinical Genetics, Radboud University Medical Center, Nijmegen, the Netherlands
| | - D Dooijes
- Department of Genetics, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - J D H Jongbloed
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - L G Boven
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - R H Lekanne Deprez
- Department of Human Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - A A M Wilde
- Department of Cardiology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, Amsterdam, the Netherlands
| | - J van der Velden
- Department of Physiology, Amsterdam UMC, Location Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - R A de Boer
- Department of Cardiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Department of Cardiology, Erasmus Medical Center, Rotterdam, the Netherlands
| | - J P van Tintelen
- Department of Genetics, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
- Netherlands Heart Institute, Utrecht, the Netherlands
| | - F W Asselbergs
- Department of Cardiology, University Medical Center Utrecht, Utrecht University, Internal Mail No HTx Secr. (E03.511), Postbus 85500, 3508 GA, Utrecht, the Netherlands
- Institute of Cardiovascular Science, Faculty of Population Health Sciences, University College London, London, UK
- Department of Cardiology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, Amsterdam, the Netherlands
- Health Data Research UK and Institute of Health Informatics, University College London, London, UK
| | - A F Baas
- Department of Genetics, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
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2
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Jansen M, Christiaans I, van der Crabben SN, Michels M, Huurman R, Hoedemaekers YM, Dooijes D, Jongbloed JDH, Boven LG, Lekanne Deprez RH, Wilde AAM, Jans JJM, van der Velden J, de Boer RA, van Tintelen JP, Asselbergs FW, Baas AF. BIO FOr CARE: biomarkers of hypertrophic cardiomyopathy development and progression in carriers of Dutch founder truncating MYBPC3 variants-design and status. Neth Heart J 2021; 29:318-329. [PMID: 33532905 PMCID: PMC8160056 DOI: 10.1007/s12471-021-01539-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2021] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Hypertrophic cardiomyopathy (HCM) is the most prevalent monogenic heart disease, commonly caused by truncating variants in the MYBPC3 gene. HCM is an important cause of sudden cardiac death; however, overall prognosis is good and penetrance in genotype-positive individuals is incomplete. The underlying mechanisms are poorly understood and risk stratification remains limited. AIM To create a nationwide cohort of carriers of truncating MYBPC3 variants for identification of predictive biomarkers for HCM development and progression. METHODS In the multicentre, observational BIO FOr CARe (Identification of BIOmarkers of hypertrophic cardiomyopathy development and progression in Dutch MYBPC3 FOunder variant CARriers) cohort, carriers of the c.2373dupG, c.2827C > T, c.2864_2865delCT and c.3776delA MYBPC3 variants are included and prospectively undergo longitudinal blood collection. Clinical data are collected from first presentation onwards. The primary outcome constitutes a composite endpoint of HCM progression (maximum wall thickness ≥ 20 mm, septal reduction therapy, heart failure occurrence, sustained ventricular arrhythmia and sudden cardiac death). RESULTS So far, 250 subjects (median age 54.9 years (interquartile range 43.3, 66.6), 54.8% male) have been included. HCM was diagnosed in 169 subjects and dilated cardiomyopathy in 4. The primary outcome was met in 115 subjects. Blood samples were collected from 131 subjects. CONCLUSION BIO FOr CARe is a genetically homogeneous, phenotypically heterogeneous cohort incorporating a clinical data registry and longitudinal blood collection. This provides a unique opportunity to study biomarkers for HCM development and prognosis. The established infrastructure can be extended to study other genetic variants. Other centres are invited to join our consortium.
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Affiliation(s)
- M Jansen
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands.
| | - I Christiaans
- Department of Genetics, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - S N van der Crabben
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - M Michels
- Department of Cardiology, Thoraxcenter, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - R Huurman
- Department of Cardiology, Thoraxcenter, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Y M Hoedemaekers
- Department of Genetics, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
- Department of Clinical Genetics, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - D Dooijes
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - J D H Jongbloed
- Department of Genetics, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - L G Boven
- Department of Genetics, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - R H Lekanne Deprez
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - A A M Wilde
- Heart Centre, Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - J J M Jans
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - J van der Velden
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - R A de Boer
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - J P van Tintelen
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
- Netherlands Heart Institute, Utrecht, The Netherlands
| | - F W Asselbergs
- Netherlands Heart Institute, Utrecht, The Netherlands
- Department of Cardiology, University Medical Centre Utrecht, Utrecht, The Netherlands
- Institute of Cardiovascular Science, Faculty of Population Health Sciences, University College London, London, UK
- Health Data Research UK and Institute of Health Informatics, University College London, London, UK
| | - A F Baas
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
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3
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van der Linde IHM, Hiemstra YL, Bökenkamp R, van Mil AM, Breuning MH, Ruivenkamp C, Ten Broeke SW, Veldkamp RF, van Waning JI, van Slegtenhorst MA, van Spaendonck-Zwarts KY, Lekanne Deprez RH, Herkert JC, Boven L, van der Zwaag PA, Jongbloed JDH, Bootsma M, Barge-Schaapveld DQCM. A Dutch MYH7 founder mutation, p.(Asn1918Lys), is associated with early onset cardiomyopathy and congenital heart defects. Neth Heart J 2017; 25:675-681. [PMID: 28864942 PMCID: PMC5691818 DOI: 10.1007/s12471-017-1037-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 08/22/2017] [Indexed: 02/07/2023] Open
Abstract
Background Mutations in the myosin heavy chain 7 (MYH7) gene commonly cause cardiomyopathy but are less frequently associated with congenital heart defects. Methods In this study, we describe a mutation in the MYH7 gene, c. 5754C > G; p. (Asn1918Lys), present in 15 probands and 65 family members. Results Of the 80 carriers (age range 0–88 years), 46 (57.5%) had cardiomyopathy (mainly dilated cardiomyopathy (DCM)) and seven (8.8%) had a congenital heart defect. Childhood onset of cardiomyopathy was present in almost 10% of carriers. However, in only a slight majority (53.7%) was the left ventricular ejection fraction reduced and almost no arrhythmias or conduction disorders were noted. Moreover, only one carrier required heart transplantation and nine (11.3%) an implantable cardioverter defibrillator. In addition, the standardised mortality ratio for MYH7 carriers was not significantly increased. Whole exome sequencing in several cases with paediatric onset of DCM and one with isolated congenital heart defects did not reveal additional known disease-causing variants. Haplotype analysis suggests that the MYH7 variant is a founder mutation, and is therefore the first Dutch founder mutation identified in the MYH7 gene. The mutation appears to have originated in the western region of the province of South Holland between 500 and 900 years ago. Conclusion Clinically, the p. (Asn1918Lys) mutation is associated with congenital heart defects and/or cardiomyopathy at young age but with a relatively benign course. Electronic supplementary material The online version of this article (10.1007/s12471-017-1037-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- I H M van der Linde
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - Y L Hiemstra
- Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - R Bökenkamp
- Department of Paediatric Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - A M van Mil
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - M H Breuning
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - C Ruivenkamp
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - S W Ten Broeke
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - R F Veldkamp
- Department of Cardiology, Haaglanden Medical Centre, The Hague, The Netherlands
| | - J I van Waning
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - M A van Slegtenhorst
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | | | - R H Lekanne Deprez
- Department of Clinical Genetics, Academic Medical Centre, Amsterdam, The Netherlands
| | - J C Herkert
- University Medical Centre Groningen, Department of Genetics, University of Groningen, Groningen, The Netherlands
| | - L Boven
- University Medical Centre Groningen, Department of Genetics, University of Groningen, Groningen, The Netherlands
| | - P A van der Zwaag
- University Medical Centre Groningen, Department of Genetics, University of Groningen, Groningen, The Netherlands
| | - J D H Jongbloed
- University Medical Centre Groningen, Department of Genetics, University of Groningen, Groningen, The Netherlands
| | - M Bootsma
- Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
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Smid BE, Hollak CEM, Poorthuis BJHM, van den Bergh Weerman MA, Florquin S, Kok WEM, Lekanne Deprez RH, Timmermans J, Linthorst GE. Diagnostic dilemmas in Fabry disease: a case series study on GLA mutations of unknown clinical significance. Clin Genet 2014; 88:161-6. [PMID: 25040344 DOI: 10.1111/cge.12449] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 06/13/2014] [Accepted: 06/24/2014] [Indexed: 11/28/2022]
Abstract
Fabry disease' (FD) phenotype is heterogeneous: alpha-galactosidase A gene mutations (GLA) can lead to classical or non-classical FD, or no FD. The aim of this study is to describe pitfalls in diagnosing non-classical FD and assess the diagnostic value of plasma globotriaosylsphingosine. This is a case series study. Family 1 (p.A143T) presented with hypertrophic cardiomyopathy (HCM), absent classical FD signs, high residual alpha-galactosidase A activity (AGAL-A) and normal plasma globotriaosylsphingosine. Co-segregating sarcomeric mutations were found. Cardiac biopsy excluded FD. In family 2 (p.P60L), FD was suspected after kidney biopsy in a female with chloroquine use. Males had residual AGAL-A, no classical FD signs and minimally increased plasma globotriaosylsphingosine, indicating that p.P60L is most likely non-pathogenic. Non-specific complications and histology can be explained by chloroquine and alternative causes. Males of two unrelated families (p.R112H) show AGAL-A <5%, but slightly elevated plasma globotriaosylsphingosine (1.2-2.0 classical males >50 nmol/l). Histological evidence suggests a variable penetrance of this mutation. Patients with GLA mutations and non-specific findings such as HCM may have non-classical FD or no FD. Other (genetic) causes of FD-like findings should be excluded, including medication inducing FD-like storage. Plasma globotriaosylsphingosine may serve as a diagnostic tool, but histology of an affected organ is often mandatory.
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Affiliation(s)
- B E Smid
- Department of Endocrinology and Metabolism, Academic Medical Centre of Amsterdam, Amsterdam, The Netherlands
| | - C E M Hollak
- Department of Endocrinology and Metabolism, Academic Medical Centre of Amsterdam, Amsterdam, The Netherlands
| | - B J H M Poorthuis
- Department of Genetic Metabolic Diseases, Academic Medical Centre of Amsterdam, Amsterdam, The Netherlands
| | | | - S Florquin
- Department of Pathology, Academic Medical Centre of Amsterdam, Amsterdam, The Netherlands
| | - W E M Kok
- Department of Cardiology, Academic Medical Centre of Amsterdam, Amsterdam, The Netherlands
| | - R H Lekanne Deprez
- Department of Clinical Genetics, Academic Medical Centre of Amsterdam, Amsterdam, The Netherlands
| | - J Timmermans
- Department of Cardiology, RadboudUMC, Nijmegen, The Netherlands
| | - G E Linthorst
- Department of Endocrinology and Metabolism, Academic Medical Centre of Amsterdam, Amsterdam, The Netherlands
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van der Tol L, Smid BE, Poorthuis BJHM, Biegstraaten M, Deprez RHL, Linthorst GE, Hollak CEM. A systematic review on screening for Fabry disease: prevalence of individuals with genetic variants of unknown significance. J Med Genet 2013; 51:1-9. [PMID: 23922385 DOI: 10.1136/jmedgenet-2013-101857] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- L van der Tol
- Department of Endocrinology and Metabolism, Amsterdam Lysosome Center 'Sphinx', Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Weterings AAW, Van Rijsingen IAW, Plomp AS, Zwinderman AH, Lekanne Deprez RH, Mannens MMAM, Van Den Bergh Weerman MA, Van Der Wal AC, Pinto SJ. A novel lamin a/c mutation in a Dutch family with premature atherosclerosis. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p2415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Weterings AAW, van Rijsingen IAW, Plomp AS, Zwinderman AH, Lekanne Deprez RH, Mannens MM, van den Bergh Weerman MA, van der Wal AC, Pinto-Sietsma SJ. A novel lamin A/C mutation in a Dutch family with premature atherosclerosis. Atherosclerosis 2013; 229:169-73. [PMID: 23659872 DOI: 10.1016/j.atherosclerosis.2013.04.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 04/05/2013] [Accepted: 04/10/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE We report a novel lamin A/C (LMNA) mutation, p.Glu223Lys, in a family with extensive atherosclerosis, diabetes mellitus and steatosis hepatis. METHODS Sequence analysis of LMNA (using Alamut version 2.2), co-segregation analysis, electron microscopy, extensive phenotypic evaluation of the mutation carriers and literature comparison were used to determine the loss of function of this mutation. RESULTS The father of three siblings died at the age of 45 years. The three siblings and the brother and sister of the father were referred to the cardiovascular genetics department, because of the premature atherosclerosis and dysmorphic characteristics observed in the father at autopsy. The novel LMNA mutation, p.Glu223Lys, was identified in the proband and his two sons. Clinical evaluation revealed atherosclerosis, insulin resistance and hypertension in the proband and dyslipidemia and hepatic steatosis in all the patients with the mutation. CONCLUSION Based on the facts that in silico analysis predicts a possibly pathogenic mutation, the mutation co-segregates with the disease, only fibroblasts from mutation carriers show nuclear blebbing and a similar phenotype was reported to be due to missense mutations in LMNA we conclude that we deal with a pathogenic mutation. We conclude that the phenotype is similar to Dunnigan-type familial partial lipodystrophy.
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Affiliation(s)
- A A W Weterings
- Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105AZ Amsterdam, The Netherlands
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Bouwman MG, Rombach SM, Linthorst GE, Poorthuis BJHM, Deprez RHL, Aerts JMFG, Wijburg FA. Early cerebral manifestations in a young female with Fabry disease with skewed X-inactivation. Clin Genet 2012; 80:500-2. [PMID: 22243051 DOI: 10.1111/j.1399-0004.2011.01643.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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van den Wijngaard A, Volders P, Van Tintelen JP, Jongbloed JDH, van den Berg MP, Lekanne Deprez RH, Mannens MMAM, Hofmann N, Slegtenhorst M, Dooijes D, Michels M, Arens Y, Jongbloed R, Smeets BJM. Recurrent and founder mutations in the Netherlands: cardiac Troponin I (TNNI3) gene mutations as a cause of severe forms of hypertrophic and restrictive cardiomyopathy. Neth Heart J 2011; 19:344-51. [PMID: 21533915 PMCID: PMC3144325 DOI: 10.1007/s12471-011-0135-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND About 2-7% of familial cardiomyopathy cases are caused by a mutation in the gene encoding cardiac troponin I (TNNI3). The related clinical phenotype is usually severe with early onset. Here we report on all currently known mutations in the Dutch population and compared these with those described in literature. METHODS TheTNNI3 gene was screened for mutations in all coding exons and flanking intronic sequences in a large cohort of cardiomyopathy patients. All Dutch index cases carrying a TNNI3 mutation that are described in this study underwent extensive cardiological evaluation and were listed by their postal codes. RESULTS In 30 families, 14 different mutations were identified. Three TNNI3 mutations were found relatively frequently in both familial and non-familial cases of hypertrophic cardiomyopathy (HCM) or restrictive cardiomyopathy (RCM). Haplotype analysis showed that p.Arg145Trp and p.Ser166Phe are founder mutations in the Netherlands, while p.Glu209Ala is not. The majority of Dutch TNNI3 mutations were associated with a HCM phenotype. Mean age at diagnosis was 36.5 years. Mutations causing RCM occurred less frequently, but were identified in very young children with a poor prognosis. CONCLUSION In line with previously published data, we found TNNI3 mutations to be rare and associated with early onset and severe clinical presentation.
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Affiliation(s)
- A van den Wijngaard
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, the Netherlands,
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Lekanne Deprez RH, Muurling-Vlietman JJ, Hruda J, Baars MJH, Wijnaendts LCD, Stolte-Dijkstra I, Alders M, van Hagen JM. Two cases of severe neonatal hypertrophic cardiomyopathy caused by compound heterozygous mutations in the MYBPC3 gene. J Med Genet 2006; 43:829-32. [PMID: 16679492 PMCID: PMC2563166 DOI: 10.1136/jmg.2005.040329] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Idiopathic (primary) hypertrophic cardiomyopathy (HCM) is mainly caused by mutations in genes encoding sarcomeric proteins. One of the most commonly mutated HCM genes is the myosin binding protein C (MYBPC3) gene. Mutations in this gene lead mainly to truncation of the protein which gives rise to a relatively mild phenotype. Pure HCM in neonates is rare and most of the time childhood HCM occurs in association with another underlying condition. OBJECTIVE To study the presence of mutations in the MYBPC3 gene in idiopathic childhood HCM. METHODS MYBPC3 coding region and splice junction variation were analysed by denaturing high performance liquid chromatography (DHPLC) and sequencing in DNA isolated from two neonates with severe unexplained HCM, who died within the first weeks of life. RESULTS Truncating mutations were found in both alleles of the MYBPC3 gene in both patients, suggesting there was no functional copy of the MYBPC3 protein. Patient 1 carried the maternally inherited c.2373_2374insG mutation and the paternally inherited splice-donor site mutation c.1624+1G-->A. Patient 2 carried the maternally inherited frameshift mutation c.3288delA (p.Glu1096fsX92) and the paternally inherited non-sense mutation c.2827C-->T (p.Arg943X). CONCLUSIONS The findings indicate the need for mutation analysis of genes encoding sarcomeric proteins in childhood HCM and the possibility of compound heterozygosity.
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Lekanne Deprez RH, Riegman PH, Groen NA, Warringa UL, van Biezen NA, Molijn AC, Bootsma D, de Jong PJ, Menon AG, Kley NA. Cloning and characterization of MN1, a gene from chromosome 22q11, which is disrupted by a balanced translocation in a meningioma. Oncogene 1995; 10:1521-8. [PMID: 7731706] [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: 01/26/2023]
Abstract
We have isolated a gene, called MN1, which resides on chromosome 22 and which was found to be disrupted by a balanced translocation (4;22) in meningioma 32. The MN1 gene spans about 70 kb and consists of at least two large exons of approximately 4.7 kb and 2.8 kb. The MN1 cDNA codes for a protein of 1319 amino acids when the first methionine in the open reading frame is used. The MN1 cDNA contains two CAG repeats, one of which codes for a string of 28 glutamines. The t(4;22) disrupts the 5'-exon within the open reading frame. In meningioma 32 no expression of the MN1 mRNA is observed. These results suggest that inactivation of the MN1 gene in this tumour may contribute to its pathogenesis.
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MESH Headings
- Amino Acid Sequence
- Base Sequence
- Blotting, Northern
- Blotting, Southern
- Chromosomes, Human, Pair 22
- Chromosomes, Human, Pair 4
- Cloning, Molecular
- DNA, Complementary/chemistry
- Genes, Tumor Suppressor
- Humans
- Meningeal Neoplasms/genetics
- Meningioma/genetics
- Molecular Sequence Data
- Translocation, Genetic
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12
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Lekanne Deprez RH, Riegman PH, van Drunen E, Warringa UL, Groen NA, Stefanko SZ, Koper JW, Avezaat CJ, Mulder PG, Zwarthoff EC. Cytogenetic, molecular genetic and pathological analyses in 126 meningiomas. J Neuropathol Exp Neurol 1995; 54:224-35. [PMID: 7876890 DOI: 10.1097/00005072-199503000-00009] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
In a series of 126 meningiomas, tumor and patient characteristics were investigated and statistically analyzed. A combined cytogenetic and molecular genetic approach was used to study chromosomal abnormalities and loss of markers on chromosome 22q. This approach was successfully applied to 93 meningiomas. In 66 cases, complete or partial loss of chromosome 22 was observed and in at least 12 of them this chromosome was involved in structural aberrations. In addition to chromosome 22 changes, chromosomes 1, 6, 11, 13, 14, 18, 19, X, and Y were also frequently involved in structural and numerical aberrations. Statistical analysis revealed a significant association between the number of chromosomal abnormalities and tumor grade. Complex karyotypes predominated in the group of grade II/III meningiomas. Furthermore, other variables showed statistically (or marginally statistically) significant differences. Meningiomas from the convexity were more often grade II/III, displayed predominantly (partial) loss of chromosome 22 and had complex karyotypes more often. These features were frequently found in meningiomas from males. Base meningiomas, on the other hand, occurred more often in females; they were usually grade I, showed loss of (parts of) chromosome 22 less often and displayed fewer additional chromosomal abnormalities.
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Lekanne Deprez RH, Bianchi AB, Groen NA, Seizinger BR, Hagemeijer A, van Drunen E, Bootsma D, Koper JW, Avezaat CJ, Kley N. Frequent NF2 gene transcript mutations in sporadic meningiomas and vestibular schwannomas. Am J Hum Genet 1994; 54:1022-9. [PMID: 7911002 PMCID: PMC1918179] [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: 01/27/2023] Open
Abstract
The gene for the hereditary disorder neurofibromatosis type 2 (NF2), which predisposes for benign CNS tumors such as vestibular schwannomas and meningiomas, has been assigned to chromosome 22 and recently has been isolated. Mutations in the NF2 gene were found in both sporadic meningiomas and vestibular schwannomas. However, so far only 6 of the 16 exons of the gene have been analyzed. In order to extend the analysis of an involvement of the NF2 gene in the sporadic counterparts of these NF2-related tumors, we have used reverse transcriptase-PCR amplification followed by SSCP and DNA sequence analysis to screen for mutations in the coding region of the NF2 gene. Analysis of the NF2 gene transcript in 53 unrelated patients with meningiomas and vestibular schwannomas revealed mutations in 32% of the sporadic meningiomas (n = 44), in 50% of the sporadic vestibular schwannomas (n = 4), in 100% of the tumors found in NF2 patients (n = 2), and in one of three tumors from multiple-meningioma patients. Of the 18 tumors in which a mutation in the NF2 gene transcript was observed and the copy number of chromosome 22 could be established, 14 also showed loss of (parts of) chromosome 22. This suggests that in sporadic meningiomas and NF2-associated tumors the NF2 gene functions as a recessive tumor-suppressor gene. The mutations detected resulted mostly in frameshifts, predicting truncations starting within the N-terminal half of the putative protein.
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van Biezen NA, Lekanne Deprez RH, Thijs A, Heutink P, Oostra BA, Geurts van Kessel AH, Zwarthoff EC. Isolation and characterization of 25 unique DNA markers for human chromosome 22. Genomics 1993; 15:206-8. [PMID: 8094368 DOI: 10.1006/geno.1993.1036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Twenty-five single-copy anonymous DNA markers for human chromosome 22 were isolated. These markers were assigned to four different regions on the chromosome. Six markers recognize restriction fragment length polymorphisms. The relative positions of five of these polymorphic markers on the framework map of chromosome 22 were determined by linkage analysis. The sizes of the NotI fragments recognized by 22 markers were determined by pulsed-field gel analysis. The total length of the NotI fragments identified is at least 12 Mb, which represents about 20% of the entire chromosome.
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Affiliation(s)
- N A van Biezen
- Department of Pathology, Erasmus University, Rotterdam, The Netherlands
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Lekanne Deprez RH, Groen NA, van Biezen NA, Hagemeijer A, van Drunen E, Koper JW, Avezaat CJ, Bootsma D, Zwarthoff EC. A t(4;22) in a meningioma points to the localization of a putative tumor-suppressor gene. Am J Hum Genet 1991; 48:783-90. [PMID: 2014801 PMCID: PMC1682947] [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: 12/29/2022] Open
Abstract
Cytogenetic analysis of meningioma cells from one particular patient (MN32) displayed the stem-line karyo-type 45, XY, -1, 4p+, 22q-, 22q+, which thus had rearrangements of both chromosomes 22. The 22q+ marker appeared as a dicentric: 22 pter----q11::1p11----qter. The reciprocal product of this translocation has presumably been lost because it lacked a centromere. The 22q- chromosome also appeared to have lost sequences distal to band q11. We assumed that this marker could have been the result of a reciprocal translocation between chromosomes 4 and 22. To investigate the 4p+ and 22q- chromosomes in more detail, human-hamster somatic cell hybrids were constructed that segregated the 22q- and 4p+ chromosomes. Southern blot analysis with DNA from these hybrids showed that sequences from 22q were indeed translocated to 4p+ and that reciprocally sequences from 4p were translocated to 22q-, demonstrating a balanced t(4;22)(p16;q11). On the basis of these results we presume that in this tumor a tumor-suppressor gene is deleted in the case of the 22q+ marker and that the t(4;22) disrupts the second allele of this gene. The latter translocation was mapped between D22S1 and D22S15, a distance of 1 cM on the linkage map of this chromosome. The area in which we have located the translocation is within the region where the gene predisposing to neurofibromatosis 2 has been mapped.
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Affiliation(s)
- R H Lekanne Deprez
- Departments of Pathology, Erasmus University, Rotterdam, The Netherlands
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Lekanne Deprez RH, van Biezen NA, Heutink P, Boejharat KR, de Klein A, Geurts van Kessel AH, Zwarthoff EC. A new polymorphic probe on chromosome 22: NB17 (D22S181). Nucleic Acids Res 1991; 19:686. [PMID: 1672761 PMCID: PMC333681] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Lekanne Deprez RH, van Biezen NA, Heutink P, Boejharat KR, de Klein A, Geurts van Kessel AH, Zwarthoff EC. A new polymorphic probe on chromosome 22: NB84 (D22S183). Nucleic Acids Res 1991; 19:687. [PMID: 1672763 PMCID: PMC333683] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Lekanne Deprez RH, van Biezen NA, Heutink P, Boejharat KR, de Klein A, Geurts van Kessel AH, Zwarthoff EC. A new polymorphic probe on chromosome 22: NB35 (D22S182). Nucleic Acids Res 1991; 19:686. [PMID: 1672762 PMCID: PMC333682] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Lekanne Deprez RH, van Biezen NA, Heutink P, Boejharat KR, de Klein A, Geurts van Kessel AH, Zwarthoff EC. A new polymorphic probe on chromosome 22q: NB129 (D22S193). Nucleic Acids Res 1991; 19:687. [PMID: 1672764 PMCID: PMC333684] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Lekanne Deprez RH, Potter van Loon BJ, van der Zon GC, Möller W, Lindhout D, Klinkhamer MP, Krans HM, Maassen JA. Individuals with only one allele for a functional insulin receptor have a tendency to hyperinsulinaemia but not to hyperglycaemia. Diabetologia 1989; 32:740-4. [PMID: 2687060 DOI: 10.1007/bf00274534] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [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: 01/02/2023]
Abstract
Recently, we described a leprechaun patient with a genetically transmitted severe insulin resistance due to the absence of functional insulin receptors as inferred from the loss of insulin binding to the patients' fibroblasts and the impaired autophosphorylation of the beta-chain of the receptor. This patient was homozygous for the genetic defect which was recently found to be a leucine to proline mutation at position 233 in the alpha-chain of the insulin receptor. In the present study we have examined insulin receptor functions in relatives of this patient. Some of these individuals are heterozygous for the genetic defect and have only one allele coding for a functional insulin receptor. Insulin binding to cultured fibroblasts from the heterozygous individuals is only 20-40% of control values indicating a Mendelian mode of inheritance of the binding defect. In contrast, insulin stimulated autophosphorylation of the beta-chain of the insulin receptor shows normal values, indicating compensation mechanisms operating on this process. The stimulation of the basal level of 2-deoxyglucose uptake by insulin in fibroblasts from the homozygous patient is 1.2 fold whereas the heterozygous and control individuals show stimulation values of approximately 1.65 fold. Basal levels of 2-deoxyglucose uptake are similar in these fibroblasts. Oral glucose tolerance tests on the heterozygous individuals indicate an increased requirement for insulin of the target tissues as concluded from the tendency towards hyperinsulinaemia with no observed hyperglycaemia.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- R H Lekanne Deprez
- Department of Medical Biochemistry, Sylvius Laboratories, Leiden, The Netherlands
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