Genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathy

Introduction and Objectives: Dilated cardiomyopathy (DCM) is a myocardial disease that can progress to a terminal stage, requiring heart transplantation. In this work we aim to contribute to knowledge of genetic variants in adult patients undergoing heart transplantation due to end-stage DCM, report...

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Main Authors: Elisabete Martins, Alexandra Sousa, Paulo Canedo, Sérgio Leite, Roberto Pinto, Manuel Campelo, Sandra Amorim, Brenda Moura, José Manuel Lopes, José Carlos Machado, José Silva Cardoso
Format: Article
Language:English
Published: Elsevier 2019-06-01
Series:Revista Portuguesa de Cardiologia
Online Access:http://www.sciencedirect.com/science/article/pii/S0870255117304298
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author Elisabete Martins
Alexandra Sousa
Paulo Canedo
Sérgio Leite
Roberto Pinto
Manuel Campelo
Sandra Amorim
Brenda Moura
José Manuel Lopes
José Carlos Machado
José Silva Cardoso
spellingShingle Elisabete Martins
Alexandra Sousa
Paulo Canedo
Sérgio Leite
Roberto Pinto
Manuel Campelo
Sandra Amorim
Brenda Moura
José Manuel Lopes
José Carlos Machado
José Silva Cardoso
Genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathy
Revista Portuguesa de Cardiologia
author_facet Elisabete Martins
Alexandra Sousa
Paulo Canedo
Sérgio Leite
Roberto Pinto
Manuel Campelo
Sandra Amorim
Brenda Moura
José Manuel Lopes
José Carlos Machado
José Silva Cardoso
author_sort Elisabete Martins
title Genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathy
title_short Genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathy
title_full Genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathy
title_fullStr Genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathy
title_full_unstemmed Genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathy
title_sort genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathy
publisher Elsevier
series Revista Portuguesa de Cardiologia
issn 0870-2551
publishDate 2019-06-01
description Introduction and Objectives: Dilated cardiomyopathy (DCM) is a myocardial disease that can progress to a terminal stage, requiring heart transplantation. In this work we aim to contribute to knowledge of genetic variants in adult patients undergoing heart transplantation due to end-stage DCM, reporting the results obtained in our single-center tertiary hospital series using target next-generation sequencing (NGS). Methods and Results: Genetic variants were screened in 15 genes, preselected based on variants previously identified in DCM patients. Thirteen unrelated patients were included, nine (69%) male, mean age at diagnosis 33±13 years, eight (62%) with familial DCM. Nine genetic variants were identified in six (46%) patients: five in LMNA, two in LBD3, one in TNNT2 and one in TCAP. These variants were new in most patients. The majority were classified as of uncertain significance. Two patients were double and triple heterozygotes in the LBD3 and LMNA genes, respectively. Conclusion: Our results highlight the potential of NGS in the genetic characterization of DCM patients. LMNA is one of the most frequently mutated genes and should be included in all target gene assessments of end-stage DCM patients until more data are available. Resumo: Introdução e objetivos: A miocardiopatia dilatada é uma doença miocárdica que pode evoluir para um estádio terminal, requerendo transplante cardíaco. Neste trabalho, pretendemos contribuir para o conhecimento das variantes genéticas presentes em pacientes adultos submetidos a transplante cardíaco, descrevendo os resultados obtidos utilizando técnicas de sequenciação de ADN de nova geração. Métodos e resultados: Variantes genéticas foram pesquisadas em 15 genes pré-selecionados com base em variantes previamente identificadas em pacientes com miocardiopatia dilatada. Foram incluídos 13 pacientes não relacionados, nove (69%) do sexo masculino, com idade média na altura do diagnóstico de 33±13 anos, oito (62%) com doença familiar. Foram identificadas nove variantes genéticas em seis (46%) pacientes: LMNA-5, LBD3-2, TNNT2-1 e TCAP- 1. A maioria das variantes genéticas foi classificada como de significado incerto. Dois pacientes eram heterozigotos duplos e triplos nos genes LBD3 e LMNA, respetivamente. Conclusões: Os nossos resultados reforçam o potencial das novas tecnologias de sequenciação na caracterização genética de doentes com miocardiopatia dilatada. Até que mais dados estejam disponíveis, o gene LMNA é um dos mais frequentemente envolvidos e deverá ser incluído na avaliação de pacientes com miocardiopatia dilatada em fase terminal. Keywords: Dilated cardiomyopathy, Heart transplantation, Next-generation sequencing, Genetic variants, Palavras-chave: Miocardiopatia dilatada, Transplante cardíaco, Sequenciação de nova geração, Variantes genéticas
url http://www.sciencedirect.com/science/article/pii/S0870255117304298
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spelling doaj-93e294520b0b4aa59599ade3dda308682020-11-25T02:40:04ZengElsevierRevista Portuguesa de Cardiologia0870-25512019-06-01386441447Genetic variants identified by target next-generation sequencing in heart transplant patients with dilated cardiomyopathyElisabete Martins0Alexandra Sousa1Paulo Canedo2Sérgio Leite3Roberto Pinto4Manuel Campelo5Sandra Amorim6Brenda Moura7José Manuel Lopes8José Carlos Machado9José Silva Cardoso10Department of Medicine, Faculty of Medicine, University of Porto, Portugal; Institute for Innovation and Health Research (I3S), Porto, Portugal; Department of Cardiology, Centro Hospitalar Universitário de São João, E.P.E., Porto, Portugal; Corresponding author.Department of Medicine, Faculty of Medicine, University of Porto, Portugal; Center for Research in Health Technologies and Services (Cintesis), Porto, Portugal; Department of Cardiology, Santa Maria Maior Hospital, Barcelos, PortugalInstitute for Innovation and Health Research (I3S), Porto, PortugalDepartment of Medicine, Faculty of Medicine, University of Porto, PortugalDepartment of Cardiology, Centro Hospitalar Universitário de São João, E.P.E., Porto, PortugalDepartment of Medicine, Faculty of Medicine, University of Porto, Portugal; Center for Research in Health Technologies and Services (Cintesis), Porto, Portugal; Department of Cardiology, Centro Hospitalar Universitário de São João, E.P.E., Porto, PortugalCenter for Research in Health Technologies and Services (Cintesis), Porto, Portugal; Department of Cardiology, Centro Hospitalar Universitário de São João, E.P.E., Porto, PortugalHospital das Forças Armadas, Porto, PortugalInstitute for Innovation and Health Research (I3S), Porto, Portugal; Department of Pathology, Centro Hospitalar Universitário de São João, E.P.E., Porto, Portugal; Departament de Pathology and Oncology, Faculty of Medicine, Porto, PortugalDepartment of Medicine, Faculty of Medicine, University of Porto, Portugal; Institute for Innovation and Health Research (I3S), Porto, PortugalDepartment of Medicine, Faculty of Medicine, University of Porto, Portugal; Center for Research in Health Technologies and Services (Cintesis), Porto, Portugal; Department of Cardiology, Centro Hospitalar Universitário de São João, E.P.E., Porto, PortugalIntroduction and Objectives: Dilated cardiomyopathy (DCM) is a myocardial disease that can progress to a terminal stage, requiring heart transplantation. In this work we aim to contribute to knowledge of genetic variants in adult patients undergoing heart transplantation due to end-stage DCM, reporting the results obtained in our single-center tertiary hospital series using target next-generation sequencing (NGS). Methods and Results: Genetic variants were screened in 15 genes, preselected based on variants previously identified in DCM patients. Thirteen unrelated patients were included, nine (69%) male, mean age at diagnosis 33±13 years, eight (62%) with familial DCM. Nine genetic variants were identified in six (46%) patients: five in LMNA, two in LBD3, one in TNNT2 and one in TCAP. These variants were new in most patients. The majority were classified as of uncertain significance. Two patients were double and triple heterozygotes in the LBD3 and LMNA genes, respectively. Conclusion: Our results highlight the potential of NGS in the genetic characterization of DCM patients. LMNA is one of the most frequently mutated genes and should be included in all target gene assessments of end-stage DCM patients until more data are available. Resumo: Introdução e objetivos: A miocardiopatia dilatada é uma doença miocárdica que pode evoluir para um estádio terminal, requerendo transplante cardíaco. Neste trabalho, pretendemos contribuir para o conhecimento das variantes genéticas presentes em pacientes adultos submetidos a transplante cardíaco, descrevendo os resultados obtidos utilizando técnicas de sequenciação de ADN de nova geração. Métodos e resultados: Variantes genéticas foram pesquisadas em 15 genes pré-selecionados com base em variantes previamente identificadas em pacientes com miocardiopatia dilatada. Foram incluídos 13 pacientes não relacionados, nove (69%) do sexo masculino, com idade média na altura do diagnóstico de 33±13 anos, oito (62%) com doença familiar. Foram identificadas nove variantes genéticas em seis (46%) pacientes: LMNA-5, LBD3-2, TNNT2-1 e TCAP- 1. A maioria das variantes genéticas foi classificada como de significado incerto. Dois pacientes eram heterozigotos duplos e triplos nos genes LBD3 e LMNA, respetivamente. Conclusões: Os nossos resultados reforçam o potencial das novas tecnologias de sequenciação na caracterização genética de doentes com miocardiopatia dilatada. Até que mais dados estejam disponíveis, o gene LMNA é um dos mais frequentemente envolvidos e deverá ser incluído na avaliação de pacientes com miocardiopatia dilatada em fase terminal. Keywords: Dilated cardiomyopathy, Heart transplantation, Next-generation sequencing, Genetic variants, Palavras-chave: Miocardiopatia dilatada, Transplante cardíaco, Sequenciação de nova geração, Variantes genéticashttp://www.sciencedirect.com/science/article/pii/S0870255117304298