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Brito D, Miltenberger-Miltenyi G, Vale Pereira S, Silva D, Diogo AN, Madeira H. Sarcomeric hypertrophic cardiomyopathy: genetic profile in a Portuguese population. Rev Port Cardiol 2012; 31:577-87. [PMID: 22857948 DOI: 10.1016/j.repc.2011.12.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 12/15/2011] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Sarcomeric hypertrophic cardiomyopathy has heterogeneous phenotypic expressions, of which sudden cardiac death is the most feared. A genetic diagnosis is essential to identify subjects at risk in each family. The spectrum of disease-causing mutations in the Portuguese population is unknown. METHODS Seventy-seven unrelated probands with hypertrophic cardiomyopathy were systematically screened for mutations by PCR and sequencing of five sarcomeric genes: MYBPC3, MYH7, TNNT2, TNNI3 and MYL2. Familial cosegregation analysis was performed in most patients. RESULTS Thirty-four different mutations were identified in 41 (53%) index patients, 71% with familial hypertrophic cardiomyopathy. The most frequently involved gene was MYBPC3 (66%) with 22 different mutations (8 novel) in 27 patients, followed by MYH7 (22%), TNNT2 (12%) and TNNI3 (2.6%). In three patients (7%), two mutations were found in MYBPC3 and/or MYH7. Additionally, 276 relatives were screened, leading to the identification of a mean of three other affected relatives for each pedigree with the familial form of the disease. CONCLUSIONS Disease-associated mutations were identified mostly in familial hypertrophic cardiomyopathy, corroborating the idea that rarely studied genes may be implicated in sporadic forms. Private mutations are the rule, MYBPC3 being the most commonly involved gene. Mutations in MYBPC3 and MYH7 accounted for most cases of sarcomere-related disease. Multiple mutations in these genes may occur, which highlights the importance of screening both. The detection of novel mutations strongly suggests that all coding regions should be systematically screened. Genotyping in hypertrophic cardiomyopathy enables a more precise diagnosis of the disease, with implications for risk stratification and genetic counseling.
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Affiliation(s)
- Dulce Brito
- Centro de Cardiologia da Universidade de Lisboa, Lisboa, Portugal.
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105
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Otsuka H, Arimura T, Abe T, Kawai H, Aizawa Y, Kubo T, Kitaoka H, Nakamura H, Nakamura K, Okamoto H, Ichida F, Ayusawa M, Nunoda S, Isobe M, Matsuzaki M, Doi YL, Fukuda K, Sasaoka T, Izumi T, Ashizawa N, Kimura A. Prevalence and Distribution of Sarcomeric Gene Mutations in Japanese Patients With Familial Hypertrophic Cardiomyopathy. Circ J 2012; 76:453-461. [DOI: 10.1253/circj.cj-11-0876] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Affiliation(s)
- Haruna Otsuka
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University
| | - Takuro Arimura
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University
| | - Tadaaki Abe
- Department of Pediatric Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Hiroya Kawai
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | | | - Toru Kubo
- Department of Medicine and Geriatrics, Kochi Medical School
| | | | - Hiroshi Nakamura
- Department of Community Health and Medicine, Yamaguchi University School of Medicine
| | - Kazufumi Nakamura
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Hiroshi Okamoto
- Department of Cardiovascular Medicine, Hokkaido Medical Center
| | - Fukiko Ichida
- Department of Pediatrics, Toyama University School of Medicine
| | - Mamoru Ayusawa
- Department of Pediatrics and Child Health, Nihon University School of Medicine
| | - Shinichi Nunoda
- Cardiovascular Division, Tokyo Women's Medical University Medical Center East
| | - Mitsuaki Isobe
- Department of Cardiovascular Medicine, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University
| | - Masunori Matsuzaki
- Department of Cardiovascular Medicine, Yamaguchi University School of Medicine
| | | | - Keiichi Fukuda
- Department of Cardiology, Keio University School of Medicine
| | - Taishi Sasaoka
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Toru Izumi
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Naoto Ashizawa
- Department of Cardiovascular Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Akinori Kimura
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University
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110
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Probst S, Oechslin E, Schuler P, Greutmann M, Boyé P, Knirsch W, Berger F, Thierfelder L, Jenni R, Klaassen S. Sarcomere Gene Mutations in Isolated Left Ventricular Noncompaction Cardiomyopathy Do Not Predict Clinical Phenotype. ACTA ACUST UNITED AC 2011; 4:367-74. [DOI: 10.1161/circgenetics.110.959270] [Citation(s) in RCA: 144] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Background—
Left ventricular noncompaction of the myocardium (LVNC) has been recognized as a cardiomyopathy with a genetic etiology. Mutations in genes encoding sarcomere proteins were shown to be associated with LVNC. We evaluated the potential clinical impact of genetic analysis of sarcomere genes in patients with LVNC.
Methods and Results—
We identified 5 mutations in cardiac myosin-binding protein C (
MYBPC3
) and 2 mutations in α-tropomyosin (
TPM1
) in a cohort of unrelated adult probands with isolated LVNC. The mutations in
MYBPC3
and
TPM1
and in 6 other previously reported sarcomere genes in this cohort resulted in a total of 18 (29%) heterozygous mutations in 63 probands. β-myosin heavy chain (
MYH7
) was the most prevalent disease gene and accounts for 13% of cases, followed by
MYBPC3
(8%). Comparing sarcomere mutation-positive and mutation-negative LVNC probands showed no significant differences in terms of average age, myocardial function, and presence of heart failure or tachyarrhythmias at initial presentation or at follow-up. Familial disease was found in 16 probands of whom 8 were sarcomere mutation positive. Nonpenetrance was detected in 2 of 8 mutation-positive families with LVNC.
Conclusions—
Mutations in sarcomere genes account for a significant (29%) proportion of cases of isolated LVNC in this cohort. The distribution of disease genes confirms genetic heterogeneity and opens new perspectives in genetic testing in patients with LVNC and their relatives at high risk of inheriting the cardiomyopathy. The presence or absence of a sarcomere gene mutation in LVNC cannot be related to the clinical phenotype.
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Affiliation(s)
- Susanne Probst
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Erwin Oechslin
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Pia Schuler
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Matthias Greutmann
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Philipp Boyé
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Walter Knirsch
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Felix Berger
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Ludwig Thierfelder
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Rolf Jenni
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
| | - Sabine Klaassen
- From the Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (S.P., L.T., S.K.); Toronto Congenital Cardiac Center for Adults, University Health Network/Toronto General Hospital, Peter Munk Cardiac Center, and University of Toronto, Toronto, Ontario, Canada (E.O.); Department of Cardiology, Cardiovascular Center, University Hospital Zürich, Zürich, Switzerland (P.S., M.G., R.J.); Working Group Cardiac MRI, Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, and Clinic
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