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Caron V, Chassaing N, Ragge N, Boschann F, Ngu AMH, Meloche E, Chorfi S, Lakhani SA, Ji W, Steiner L, Marcadier J, Jansen PR, van de Pol LA, van Hagen JM, Russi AS, Le Guyader G, Nordenskjöld M, Nordgren A, Anderlid BM, Plaisancié J, Stoltenburg C, Horn D, Drenckhahn A, Hamdan FF, Lefebvre M, Attie-Bitach T, Forey P, Smirnov V, Ernould F, Jacquemont ML, Grotto S, Alcantud A, Coret A, Ferrer-Avargues R, Srivastava S, Vincent-Delorme C, Romoser S, Safina N, Saade D, Lupski JR, Calame DG, Geneviève D, Chatron N, Schluth-Bolard C, Myers KA, Dobyns WB, Calvas P, Salmon C, Holt R, Elmslie F, Allaire M, Prigozhin DM, Tremblay A, Michaud JL. Clinical and functional heterogeneity associated with the disruption of retinoic acid receptor beta. Genet Med 2023; 25:100856. [PMID: 37092537 PMCID: PMC10757562 DOI: 10.1016/j.gim.2023.100856] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 04/13/2023] [Accepted: 04/16/2023] [Indexed: 04/25/2023] Open
Abstract
PURPOSE Dominant variants in the retinoic acid receptor beta (RARB) gene underlie a syndromic form of microphthalmia, known as MCOPS12, which is associated with other birth anomalies and global developmental delay with spasticity and/or dystonia. Here, we report 25 affected individuals with 17 novel pathogenic or likely pathogenic variants in RARB. This study aims to characterize the functional impact of these variants and describe the clinical spectrum of MCOPS12. METHODS We used in vitro transcriptional assays and in silico structural analysis to assess the functional relevance of RARB variants in affecting the normal response to retinoids. RESULTS We found that all RARB variants tested in our assays exhibited either a gain-of-function or a loss-of-function activity. Loss-of-function variants disrupted RARB function through a dominant-negative effect, possibly by disrupting ligand binding and/or coactivators' recruitment. By reviewing clinical data from 52 affected individuals, we found that disruption of RARB is associated with a more variable phenotype than initially suspected, with the absence in some individuals of cardinal features of MCOPS12, such as developmental eye anomaly or motor impairment. CONCLUSION Our study indicates that pathogenic variants in RARB are functionally heterogeneous and associated with extensive clinical heterogeneity.
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Affiliation(s)
| | - Nicolas Chassaing
- Service de Génétique Médicale, Hôpital Purpan CHU Toulouse, Toulouse, France; Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, CHU Toulouse, Toulouse, France
| | - Nicola Ragge
- Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, United Kingdom; West Midlands Regional Genetics Service, Birmingham Women's and Children's NHS Foundation Trust and Birmingham Health Partners, Birmingham, United Kingdom
| | - Felix Boschann
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute for Medical Genetics and Human Genetics, Berlin, Germany
| | | | | | - Sarah Chorfi
- CHU Sainte-Justine Research Center, Montréal, QC, Canada
| | - Saquib A Lakhani
- Pediatric Genomic Discovery Program, Department of Pediatrics, Yale University School of Medicine, New Haven, CT
| | - Weizhen Ji
- Pediatric Genomic Discovery Program, Department of Pediatrics, Yale University School of Medicine, New Haven, CT
| | - Laurie Steiner
- Department of Pediatrics, University of Rochester Medical Center, Rochester, NY
| | - Julien Marcadier
- Department of Medical Genetics, Alberta Children's Hospital, Calgary, AB, Canada
| | - Philip R Jansen
- Department of Human Genetics, Amsterdam UMC, Amsterdam, The Netherlands
| | - Laura A van de Pol
- Department of Pediatric Neurology, Amsterdam UMC, location Vrije Universiteit, Amsterdam, The Netherlands
| | | | | | | | - Magnus Nordenskjöld
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Department of Clinical genetics, Karolinska University Hospital, Stockholm, Sweden
| | - Ann Nordgren
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Department of Clinical genetics, Karolinska University Hospital, Stockholm, Sweden
| | - Britt-Marie Anderlid
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Department of Clinical genetics, Karolinska University Hospital, Stockholm, Sweden
| | - Julie Plaisancié
- Service de Génétique Médicale, Hôpital Purpan CHU Toulouse, Toulouse, France; Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, CHU Toulouse, Toulouse, France
| | - Corinna Stoltenburg
- Department of Pediatric Neurology, Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Denise Horn
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute for Medical Genetics and Human Genetics, Berlin, Germany
| | - Anne Drenckhahn
- Department of Pediatric Neurology, Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Fadi F Hamdan
- CHU Sainte-Justine Research Center, Montréal, QC, Canada; Department of Pediatrics, Université de Montréal, Montréal, QC, Canada
| | | | - Tania Attie-Bitach
- Service de médecine génomique des maladies rares, Hôpital Universitaire Necker-Enfants malade, Paris, France
| | - Peggy Forey
- Centre Hospitalier d'Angoulême, Angoulême, France
| | - Vasily Smirnov
- Exploration de la Vision et Neuro-Ophtalmologie, Hôpital Roger-Salengro, CHU de Lille, Lille, France
| | - Françoise Ernould
- Service d'ophtalmologie, Hôpital Claude Huriez, CHU de Lille, Lille, France
| | | | - Sarah Grotto
- Unité de Génétique Clinique, Hôpital Robert Debré, Paris, France
| | | | - Alicia Coret
- Servicio de Pediatría, Hospital de Sagunto, Valencia, Spain
| | | | - Siddharth Srivastava
- Department of Neurology, Rosamund Stone Zander Translational Neuroscience Center, Boston Children's Hospital, Boston, MA
| | | | - Shelby Romoser
- Division of Medical Genetics and Genomics, Stead Family Department of Pediatrics, University of Iowa Hospitals and Clinics, Iowa City, IA
| | - Nicole Safina
- Division of Medical Genetics and Genomics, Stead Family Department of Pediatrics, University of Iowa Hospitals and Clinics, Iowa City, IA
| | - Dimah Saade
- Division of Child Neurology, Stead Family Department of Pediatrics, Department of Neurology, UI Carver College of Medicine, Iowa City, IA
| | - James R Lupski
- Department of Pediatrics and Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Texas Children's Hospital, Houston, TX; Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX
| | - Daniel G Calame
- Department of Pediatrics and Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Texas Children's Hospital, Houston, TX; Section of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - David Geneviève
- Université Montpellier, INSERM U1183, Génétique clinique, CHU de Montpellier, Montpellier, France
| | - Nicolas Chatron
- Service de Génétique, Hospices Civils de Lyon, Lyon, France; Institut Neuromyogène, CNRS UMR 5310 - INSERM U1217, Université Claude Bernard Lyon 1, Lyon, France
| | | | - Kenneth A Myers
- Division of Neurology, Department of Pediatrics, McGill University Health Centre, Montreal, QC, Canada
| | - William B Dobyns
- Department of Pediatrics, University of Minnesota, Minneapolis, MN
| | - Patrick Calvas
- Service de Génétique Médicale, Hôpital Purpan CHU Toulouse, Toulouse, France; Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, CHU Toulouse, Toulouse, France
| | - Caroline Salmon
- Children's & Adolescent Services, Royal Surrey County Hospital, Guildford, Surrey, United Kingdom
| | - Richard Holt
- Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, United Kingdom
| | - Frances Elmslie
- St George's University Hospitals NHS Foundation Trust, London, United Kingdom
| | - Marc Allaire
- Berkeley Center for Structural Biology, Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA
| | - Daniil M Prigozhin
- Berkeley Center for Structural Biology, Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA
| | - André Tremblay
- CHU Sainte-Justine Research Center, Montréal, QC, Canada; Department of Obstetrics & Gynecology, Université de Montréal, Montréal, QC, Canada; Department of Biochemistry and Molecular Medecine, Université de Montréal, Montréal, QC, Canada.
| | - Jacques L Michaud
- CHU Sainte-Justine Research Center, Montréal, QC, Canada; Department of Pediatrics, Université de Montréal, Montréal, QC, Canada; Department of Neurosciences, Université de Montréal, Montréal, QC, Canada.
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Chesneau B, Aubert-Mucca M, Fremont F, Pechmeja J, Soler V, Isidor B, Nizon M, Dollfus H, Kaplan J, Fares-Taie L, Rozet JM, Busa T, Lacombe D, Naudion S, Amiel J, Rio M, Attie-Bitach T, Lesage C, Thouvenin D, Odent S, Morel G, Vincent-Delorme C, Boute O, Vanlerberghe C, Dieux A, Boussion S, Faivre L, Pinson L, Laffargue F, Le Guyader G, Le Meur G, Prieur F, Lambert V, Laudier B, Cottereau E, Ayuso C, Corton-Pérez M, Bouneau L, Le Caignec C, Gaston V, Jeanton-Scaramouche C, Dupin-Deguine D, Calvas P, Chassaing N, Plaisancié J. First evidence of SOX2 mutations in Peters' anomaly: lessons from molecular screening of 95 patients. Clin Genet 2022; 101:494-506. [PMID: 35170016 DOI: 10.1111/cge.14123] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 02/10/2022] [Accepted: 02/12/2022] [Indexed: 11/30/2022]
Abstract
Peters' anomaly (PA) is a rare anterior segment dysgenesis characterized by central corneal opacity and irido-lenticulo-corneal adhesions. Several genes are involved in syndromic or isolated PA (B3GLCT, PAX6, PITX3, FOXE3, CYP1B1). Some Copy Number Variations (CNVs) have also been occasionally reported. Despite this genetic heterogeneity, most of patients remain without genetic diagnosis. We retrieved a cohort of 95 individuals with PA and performed genotyping using a combination of Comparative genomic hybridization, whole genome, exome and targeted sequencing of 119 genes associated with ocular development anomalies. Causative genetic defects involving 12 genes and CNVs were identified for 1/3 of patients. Unsurprisingly, B3GLCT and PAX6 were the most frequently implicated genes, respectively in syndromic and isolated PA. Unexpectedly, the third gene involved in our cohort was SOX2, the major gene of micro-anophthalmia. Four unrelated patients with PA (isolated or with microphthalmia) were carrying pathogenic variants in this gene that was never associated with PA before. Here we described the largest cohort of PA patients ever reported. The genetic bases of PA are still to be explored as genetic diagnosis was unavailable for 2/3 of patients. Nevertheless, we showed here for the first time the involvement of SOX2 in PA, offering new evidence for its role in corneal transparency and anterior segment development. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Bertrand Chesneau
- Génétique Médicale, Hôpital Purpan, CHU, Toulouse, France.,Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU, Toulouse, France
| | | | - Félix Fremont
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU, Toulouse, France.,Service d'ophtalmologie, Hôpital Purpan, CHU Toulouse, France
| | - Jacmine Pechmeja
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU, Toulouse, France.,Service d'ophtalmologie, Hôpital Purpan, CHU Toulouse, France
| | - Vincent Soler
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU, Toulouse, France.,Service d'ophtalmologie, Hôpital Purpan, CHU Toulouse, France
| | - Bertrand Isidor
- Génétique Médicale, Institut du thorax, INSERM, CNRS, UNIV Nantes, Nantes, France
| | - Mathilde Nizon
- Génétique Médicale, Institut du thorax, INSERM, CNRS, UNIV Nantes, Nantes, France
| | - Hélène Dollfus
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), Hôpitaux Universitaires, Strasbourg, France
| | - Josseline Kaplan
- Laboratoire de Génétique Ophtalmologique, INSERM U1163, Institut Imagine, Paris, France
| | - Lucas Fares-Taie
- Laboratoire de Génétique Ophtalmologique, INSERM U1163, Institut Imagine, Paris, France
| | - Jean-Michel Rozet
- Laboratoire de Génétique Ophtalmologique, INSERM U1163, Institut Imagine, Paris, France
| | - Tiffany Busa
- Génétique Clinique, AP- HM CHU Timone Enfants, Marseille, France
| | - Didier Lacombe
- Département de Génétique Médicale, CHU Bordeaux, Bordeaux, France
| | - Sophie Naudion
- Département de Génétique Médicale, CHU Bordeaux, Bordeaux, France
| | - Jeanne Amiel
- Service de Génétique Médicale, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Marlène Rio
- Service de Génétique Médicale, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Tania Attie-Bitach
- Service d'Histologie-Embryologie-Cytogénétique, Hôpital Necker-Enfants Malades, AP-, HP, Paris, France
| | | | | | - Sylvie Odent
- Service de Génétique Clinique, Centre Labellisé pour les Anomalies du Développement Ouest, CHU Rennes; Institut de Génétique et Développement de Rennes, CNRS, UMR 6290, Université de Rennes, ERN ITHACA, France
| | - Godelieve Morel
- Service de Génétique Clinique, Centre Labellisé pour les Anomalies du Développement Ouest, CHU Rennes; Institut de Génétique et Développement de Rennes, CNRS, UMR 6290, Université de Rennes, ERN ITHACA, France
| | | | | | | | | | | | - Laurence Faivre
- Centre de Référence Anomalies du Développement et Syndromes Malformatifs, FHU TRANSLAD, CHU, Dijon, France
| | - Lucile Pinson
- Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, CHU de Montpellier, France
| | | | | | | | | | - Victor Lambert
- Service d'ophtalmologie, Hôpital Nord, Saint-Etienne, France
| | | | | | - Carmen Ayuso
- Genetics & Genomics Department, Jiménez Díaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD-UAM). Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Marta Corton-Pérez
- Genetics & Genomics Department, Jiménez Díaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD-UAM). Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | | | | | | | | | | | - Patrick Calvas
- Génétique Médicale, Hôpital Purpan, CHU, Toulouse, France.,Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU, Toulouse, France
| | - Nicolas Chassaing
- Génétique Médicale, Hôpital Purpan, CHU, Toulouse, France.,Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU, Toulouse, France
| | - Julie Plaisancié
- Génétique Médicale, Hôpital Purpan, CHU, Toulouse, France.,Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU, Toulouse, France.,INSERM U1214, ToNIC, Université Toulouse III, France
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