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Lezirovitz K, Vieira-Silva GA, Batissoco AC, Levy D, Kitajima JP, Trouillet A, Ouyang E, Zebarjadi N, Sampaio-Silva J, Pedroso-Campos V, Nascimento LR, Sonoda CY, Borges VM, Vasconcelos LG, Beck RMO, Grasel SS, Jagger DJ, Grillet N, Bento RF, Mingroni-Netto RC, Oiticica J. A rare genomic duplication in 2p14 underlies autosomal dominant hearing loss DFNA58. Hum Mol Genet 2021; 29:1520-1536. [PMID: 32337552 DOI: 10.1093/hmg/ddaa075] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/02/2020] [Accepted: 04/20/2020] [Indexed: 02/07/2023] Open
Abstract
Here we define a ~200 Kb genomic duplication in 2p14 as the genetic signature that segregates with postlingual progressive sensorineural autosomal dominant hearing loss (HL) in 20 affected individuals from the DFNA58 family, first reported in 2009. The duplication includes two entire genes, PLEK and CNRIP1, and the first exon of PPP3R1 (protein coding), in addition to four uncharacterized long non-coding (lnc) RNA genes and part of a novel protein-coding gene. Quantitative analysis of mRNA expression in blood samples revealed selective overexpression of CNRIP1 and of two lncRNA genes (LOC107985892 and LOC102724389) in all affected members tested, but not in unaffected ones. Qualitative analysis of mRNA expression identified also fusion transcripts involving parts of PPP3R1, CNRIP1 and an intergenic region between PLEK and CNRIP1, in the blood of all carriers of the duplication, but were heterogeneous in nature. By in situ hybridization and immunofluorescence, we showed that Cnrip1, Plek and Ppp3r1 genes are all expressed in the adult mouse cochlea including the spiral ganglion neurons, suggesting changes in expression levels of these genes in the hearing organ could underlie the DFNA58 form of deafness. Our study highlights the value of studying rare genomic events leading to HL, such as copy number variations. Further studies will be required to determine which of these genes, either coding proteins or non-coding RNAs, is or are responsible for DFNA58 HL.
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Affiliation(s)
- Karina Lezirovitz
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil.,Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
| | - Gleiciele A Vieira-Silva
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil.,Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
| | - Ana C Batissoco
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil.,Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
| | - Débora Levy
- Lipids, Oxidation, and Cell Biology Group, Head, Laboratory of Immunology (LIM19), Heart Institute (InCor), Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-900, Brazil
| | | | - Alix Trouillet
- Department of Otolaryngology - Head and Neck Surgery, Stanford University, Stanford, CA 94305, USA
| | - Ellen Ouyang
- Department of Otolaryngology - Head and Neck Surgery, Stanford University, Stanford, CA 94305, USA
| | - Navid Zebarjadi
- Department of Otolaryngology - Head and Neck Surgery, Stanford University, Stanford, CA 94305, USA
| | - Juliana Sampaio-Silva
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil
| | - Vinicius Pedroso-Campos
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil
| | - Larissa R Nascimento
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil.,Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
| | - Cindy Y Sonoda
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil
| | - Vinícius M Borges
- Centro de Pesquisas sobre o Genoma Humano e Células-Tronco, Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo 05508-900, Brazil
| | - Laura G Vasconcelos
- Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
| | - Roberto M O Beck
- Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
| | - Signe S Grasel
- Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
| | - Daniel J Jagger
- UCL Ear Institute, University College London, London WC1E 6BT, UK
| | - Nicolas Grillet
- Department of Otolaryngology - Head and Neck Surgery, Stanford University, Stanford, CA 94305, USA
| | - Ricardo F Bento
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil.,Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
| | - Regina C Mingroni-Netto
- Centro de Pesquisas sobre o Genoma Humano e Células-Tronco, Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo 05508-900, Brazil
| | - Jeanne Oiticica
- Otorhinolaryngology/LIM32, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 01246-000, Brazil.,Departamento de Otorrinolaringologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 05403-000, Brazil
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Considering specific clinical features as evidence of pathogenic copy number variants. J Appl Genet 2014; 55:189-96. [PMID: 24535828 DOI: 10.1007/s13353-014-0197-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 01/24/2014] [Accepted: 01/29/2014] [Indexed: 01/29/2023]
Abstract
Since the introduction of high-resolution microarray technologies, it has become apparent that structural chromosomal rearrangements can lead to a wide variety of clinical manifestations, including developmental delay/intellectual disability (DD/ID). It has been shown previously that the diagnostic yield of genome-wide array-based identification of submicroscopic alterations in patients with ID varies widely and depends on the patient selection criteria. More attempts have recently been made to define the phenotypic clues of pathogenic copy number variants (CNVs). The aim of this study was to investigate a well-phenotyped cohort of patients with DD/ID and determine whether certain clinical features may serve as indicators for pathogenic CNVs. A retrospective analysis was conducted for patients with DD/ID (n = 211) who were tested using genome-wide chromosomal microarray technologies and a review of the clinical data was performed. Pathogenic CNVs were detected in 29 patients. In comparison with individuals who had normal molecular karyotyping results (n = 182), malformations of the musculoskeletal system; congenital malformations of the CNS (particularly hydrocephalus and congenital malformations of the corpus callosum); minor anomalies of the eye, face, and neck subgroup (particularly downward-slanting palpebral fissures, minor anomalies of the ear, and micrognathia); brachydactyly; and umbilical hernia were more common in patients with chromosomal alterations. A multivariate logistic regression analysis allowed the identification of three independent pathogenic CNV predictors: congenital malformations of the corpus callosum, minor anomalies of the ear, and brachydactyly. Insights into the chromosomal phenotype may help to increase the diagnostic yield of microarray technologies and sharpen the distinction between chromosomal alterations and other conditions.
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Blassnig-Ezeh A, Bandelier C, Frühmesser A, Revencu N, Krabichler B, Beauloye V, Ravoet M, Fauth C, Zschocke J, Simma B, Kotzot D. Severe growth retardation, delayed bone age, and facial dysmorphism in two patients with microduplications in 2p16 → p22. Am J Med Genet A 2013; 161A:3176-81. [DOI: 10.1002/ajmg.a.36176] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 07/16/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Anya Blassnig-Ezeh
- Department of Pediatrics, Landeskrankenhaus Feldkirch; Academic Teaching Hospital; Austria
| | - Claude Bandelier
- Center for Human Genetics; Cliniques universitaires Saint-Luc; Université catholique de Louvain; Brussels Belgium
| | - Anne Frühmesser
- Division of Human Genetics, Department of Medical Genetics; Molecular and Clinical Pharmacology, Innsbruck Medical University; Innsbruck Austria
| | - Nicole Revencu
- Center for Human Genetics; Cliniques universitaires Saint-Luc; Université catholique de Louvain; Brussels Belgium
| | - Birgit Krabichler
- Division of Human Genetics, Department of Medical Genetics; Molecular and Clinical Pharmacology, Innsbruck Medical University; Innsbruck Austria
| | - Véronique Beauloye
- Paediatric Endocrinology Unit, Cliniques universitaires Saint-Luc; Université catholique de Louvain; Brussels Belgium
| | - Marie Ravoet
- Center for Human Genetics; Cliniques universitaires Saint-Luc; Université catholique de Louvain; Brussels Belgium
| | - Christine Fauth
- Division of Human Genetics, Department of Medical Genetics; Molecular and Clinical Pharmacology, Innsbruck Medical University; Innsbruck Austria
| | - Johannes Zschocke
- Division of Human Genetics, Department of Medical Genetics; Molecular and Clinical Pharmacology, Innsbruck Medical University; Innsbruck Austria
| | - Burkhard Simma
- Department of Pediatrics, Landeskrankenhaus Feldkirch; Academic Teaching Hospital; Austria
| | - Dieter Kotzot
- Division of Human Genetics, Department of Medical Genetics; Molecular and Clinical Pharmacology, Innsbruck Medical University; Innsbruck Austria
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