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Polla DL, Cardoso MTO, Silva MCB, Cardoso ICC, Medina CTN, Araujo R, Fernandes CC, Reis AMM, de Andrade RV, Pereira RW, Pogue R. Use of Targeted Exome Sequencing for Molecular Diagnosis of Skeletal Disorders. PLoS One 2015; 10:e0138314. [PMID: 26380986 PMCID: PMC4575211 DOI: 10.1371/journal.pone.0138314] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 08/28/2015] [Indexed: 01/19/2023] Open
Abstract
Genetic disorders of the skeleton comprise a large group of more than 450 clinically distinct and genetically heterogeneous diseases associated with mutations in more than 300 genes. Achieving a definitive diagnosis is complicated due to the genetic heterogeneity of these disorders, their individual rarity and their diverse radiographic presentations. We used targeted exome sequencing and designed a 1.4Mb panel for simultaneous testing of more than 4,800 exons in 309 genes involved in skeletal disorders. DNA from 69 individuals from 66 families with a known or suspected clinical diagnosis of a skeletal disorder was analyzed. Of 36 cases with a specific clinical hypothesis with a known genetic basis, mutations were identified for eight cases (22%). Of 20 cases with a suspected skeletal disorder but without a specific diagnosis, four causative mutations were identified. Also included were 11 cases with a specific skeletal disorder but for which there was at the time no known associated gene. For these cases, one mutation was identified in a known skeletal disease genes, and re-evaluation of the clinical phenotype in this case changed the diagnoses from osteodysplasia syndrome to Apert syndrome. These results suggest that the NGS panel provides a fast, accurate and cost-effective molecular diagnostic tool for identifying mutations in a highly genetically heterogeneous set of disorders such as genetic skeletal disorders. The data also stress the importance of a thorough clinical evaluation before DNA sequencing. The strategy should be applicable to other groups of disorders in which the molecular basis is largely known.
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Affiliation(s)
- Daniel L. Polla
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - Maria T. O. Cardoso
- Núcleo de Genética da Secretaria de Saúde do Distrito Federal, Brasília, Distrito Federal, Brazil
- Curso de Medicina, Universidade Católica de Brasília, Taguatinga, Distrito Federal, Brazil
| | - Mayara C. B. Silva
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - Isabela C. C. Cardoso
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - Cristina T. N. Medina
- Núcleo de Genética da Secretaria de Saúde do Distrito Federal, Brasília, Distrito Federal, Brazil
| | - Rosenelle Araujo
- Núcleo de Genética da Secretaria de Saúde do Distrito Federal, Brasília, Distrito Federal, Brazil
| | - Camila C. Fernandes
- Departamento de Tecnologia, Laboratório Multiusuário Centralizado para Sequenciamento de DNA em Larga Escala e Análise de Expressão Gênica, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Campus Jaboticabal, Jaboticabal, São Paulo, Brazil
| | - Alessandra M. M. Reis
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - Rosangela V. de Andrade
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - Rinaldo W. Pereira
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - Robert Pogue
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
- * E-mail:
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