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Chesneau B, Calvas P, Cassagne M, Varenne F, Rozet JM, Bonneville F, Chassaing N, Fournié P, Fares-Taie L, Plaisancié J. ITPR1: The missing gene in miosis-ataxia syndrome? Am J Med Genet A 2024:e63655. [PMID: 38711238 DOI: 10.1002/ajmg.a.63655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/23/2024] [Accepted: 04/26/2024] [Indexed: 05/08/2024]
Abstract
The association of early-onset non-progressive ataxia and miosis is an extremely rare phenotypic entity occasionally reported in the literature. To date, only one family (two siblings and their mother) has benefited from a genetic diagnosis by the identification of a missense heterozygous variant (p.Arg36Cys) in the ITPR1 gene. This gene encodes the inositol 1,4,5-trisphosphate receptor type 1, an intracellular channel that mediates calcium release from the endoplasmic reticulum. Deleterious variants in this gene are known to be associated with two types of spinocerebellar ataxia, SCA15 and SCA29, and with Gillespie syndrome that is associated with ataxia, partial iris hypoplasia, and intellectual disability. In this work, we describe a novel individual carrying a heterozygous missense variant (p.Arg36Pro) at the same position in the N-terminal suppressor domain of ITPR1 as the family previously reported, with the same phenotype associating early-onset non-progressive ataxia and miosis. This second report confirms the implication of ITPR1 in the miosis-ataxia syndrome and therefore broadens the clinical spectrum of the gene. Moreover, the high specificity of the phenotype makes it a recognizable syndrome of genetic origin.
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Affiliation(s)
- Bertrand Chesneau
- Laboratoire de Référence (LBMR) des anomalies malformatives de l'œil, Institut Fédératif de Biologie (IFB), CHU Toulouse, Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique, CARGO, site constitutif, CHU Toulouse, Toulouse, France
- Molecular, Cellular and Developmental Biology Unit (MCD), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Patrick Calvas
- Centre de Référence des Affections Rares en Génétique Ophtalmologique, CARGO, site constitutif, CHU Toulouse, Toulouse, France
| | | | - Fanny Varenne
- Centre de Référence des Affections Rares en Génétique Ophtalmologique, CARGO, site constitutif, CHU Toulouse, Toulouse, France
- Service d'Ophtalmologie, Hôpital Purpan, Toulouse, France
| | - Jean-Michel Rozet
- Laboratoire de Génétique Ophtalmologique, INSERM U1163, Institut Imagine, Paris, France
| | - Fabrice Bonneville
- Département de Neuroradiologie, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Nicolas Chassaing
- Laboratoire de Référence (LBMR) des anomalies malformatives de l'œil, Institut Fédératif de Biologie (IFB), CHU Toulouse, Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique, CARGO, site constitutif, CHU Toulouse, Toulouse, France
| | - Pierre Fournié
- Service d'Ophtalmologie, Hôpital Purpan, Toulouse, France
| | - Lucas Fares-Taie
- Laboratoire de Génétique Ophtalmologique, INSERM U1163, Institut Imagine, Paris, France
| | - Julie Plaisancié
- Laboratoire de Référence (LBMR) des anomalies malformatives de l'œil, Institut Fédératif de Biologie (IFB), CHU Toulouse, Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique, CARGO, site constitutif, CHU Toulouse, Toulouse, France
- Molecular, Cellular and Developmental Biology Unit (MCD), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, Toulouse, France
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Plaisancié J, Chesneau B, Fares-Taie L, Rozet JM, Pechmeja J, Noero J, Gaston V, Bailleul-Forestier I, Calvas P, Chassaing N. Structural Variant Disrupting the Expression of the Remote FOXC1 Gene in a Patient with Syndromic Complex Microphthalmia. Int J Mol Sci 2024; 25:2669. [PMID: 38473917 DOI: 10.3390/ijms25052669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 03/14/2024] Open
Abstract
Ocular malformations (OMs) arise from early defects during embryonic eye development. Despite the identification of over 100 genes linked to this heterogeneous group of disorders, the genetic cause remains unknown for half of the individuals following Whole-Exome Sequencing. Diagnosis procedures are further hampered by the difficulty of studying samples from clinically relevant tissue, which is one of the main obstacles in OMs. Whole-Genome Sequencing (WGS) to screen for non-coding regions and structural variants may unveil new diagnoses for OM individuals. In this study, we report a patient exhibiting a syndromic OM with a de novo 3.15 Mb inversion in the 6p25 region identified by WGS. This balanced structural variant was located 100 kb away from the FOXC1 gene, previously associated with ocular defects in the literature. We hypothesized that the inversion disrupts the topologically associating domain of FOXC1 and impairs the expression of the gene. Using a new type of samples to study transcripts, we were able to show that the patient presented monoallelic expression of FOXC1 in conjunctival cells, consistent with the abolition of the expression of the inverted allele. This report underscores the importance of investigating structural variants, even in non-coding regions, in individuals affected by ocular malformations.
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Affiliation(s)
- Julie Plaisancié
- Laboratoire de Référence des Anomalies Malformatives de l'Œil, Institut Fédératif de Biologie, Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique (CARGO), Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Molecular, Cellular and Developmental Biology Unit (MCD), Centre de Biologie Intégrative (CBI), (CNRS), Université Toulouse III Paul Sabatier (UPS), Université de Toulouse, 31062 Toulouse, France
| | - Bertrand Chesneau
- Laboratoire de Référence des Anomalies Malformatives de l'Œil, Institut Fédératif de Biologie, Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique (CARGO), Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Molecular, Cellular and Developmental Biology Unit (MCD), Centre de Biologie Intégrative (CBI), (CNRS), Université Toulouse III Paul Sabatier (UPS), Université de Toulouse, 31062 Toulouse, France
| | - Lucas Fares-Taie
- Laboratoire de Génétique Ophtalmologique, Institut national de la Santé et de la Recherche Médicale (INSERM) U1163, Institut Imagine, 75015 Paris, France
| | - Jean-Michel Rozet
- Laboratoire de Génétique Ophtalmologique, Institut national de la Santé et de la Recherche Médicale (INSERM) U1163, Institut Imagine, 75015 Paris, France
| | - Jacmine Pechmeja
- Centre de Référence des Affections Rares en Génétique Ophtalmologique (CARGO), Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Service d'Ophtalmologie, Hôpital Purpan, Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
| | - Julien Noero
- Laboratoire de Référence des Anomalies Malformatives de l'Œil, Institut Fédératif de Biologie, Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Molecular, Cellular and Developmental Biology Unit (MCD), Centre de Biologie Intégrative (CBI), (CNRS), Université Toulouse III Paul Sabatier (UPS), Université de Toulouse, 31062 Toulouse, France
| | - Véronique Gaston
- Laboratoire de Référence des Anomalies Malformatives de l'Œil, Institut Fédératif de Biologie, Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
| | | | - Patrick Calvas
- Laboratoire de Référence des Anomalies Malformatives de l'Œil, Institut Fédératif de Biologie, Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique (CARGO), Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
| | - Nicolas Chassaing
- Laboratoire de Référence des Anomalies Malformatives de l'Œil, Institut Fédératif de Biologie, Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique (CARGO), Centre Hospitalier Universitaire de Toulouse, 31300 Toulouse, France
- Laboratoire AURAGEN, 69003 Lyon, France
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Plaisancié J, Martinovic J, Chesneau B, Whalen S, Rodriguez D, Audebert-Bellanger S, Marzin P, Grotto S, Perthus I, Holt RJ, Bax DA, Ragge N, Chassaing N. Clinical, genetic and biochemical signatures of RBP4-related ocular malformations. J Med Genet 2023; 61:84-92. [PMID: 37586836 DOI: 10.1136/jmg-2023-109331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 07/16/2023] [Indexed: 08/18/2023]
Abstract
BACKGROUND The retinoic acid (RA) pathway plays a crucial role in both eye morphogenesis and the visual cycle. Individuals with monoallelic and biallelic pathogenic variants in retinol-binding protein 4 (RBP4), encoding a serum retinol-specific transporter, display variable ocular phenotypes. Although few families have been reported worldwide, recessive inherited variants appear to be associated with retinal degeneration, while individuals with dominantly inherited variants manifest ocular development anomalies, mainly microphthalmia, anophthalmia and coloboma (MAC). METHODS We report here seven new families (13 patients) with isolated and syndromic MAC harbouring heterozygous RBP4 variants, of whom we performed biochemical analyses. RESULTS For the first time, malformations that overlap the clinical spectrum of vitamin A deficiency are reported, providing a link with other RA disorders. Our data support two distinct phenotypes, depending on the nature and mode of inheritance of the variants: dominantly inherited, almost exclusively missense, associated with ocular malformations, in contrast to recessive, mainly truncating, associated with retinal degeneration. Moreover, we also confirm the skewed inheritance and impact of maternal RBP4 genotypes on phenotypical expression in dominant forms, suggesting that maternal RBP4 genetic status and content of diet during pregnancy may modify MAC occurrence and severity. Furthermore, we demonstrate that retinol-binding protein blood dosage in patients could provide a biological signature crucial for classifying RBP4 variants. Finally, we propose a novel hypothesis to explain the mechanisms underlying the observed genotype-phenotype correlations in RBP4 mutational spectrum. CONCLUSION Dominant missense variants in RBP4 are associated with MAC of incomplete penetrance with maternal inheritance through a likely dominant-negative mechanism.
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Affiliation(s)
- Julie Plaisancié
- Laboratoire National de Référence (LBMR), Génétique des anomalies malformatives de l'œil, CHU Toulouse, Toulouse, France
- Unité ToNIC Inserm 1214, CHU Toulouse, Toulouse, France
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU Toulouse, Toulouse, France
| | - Jelena Martinovic
- Département de Génétique, Unité de Fœtopathologie, Hopital Necker-Enfants Malades, Paris, France
| | - Bertrand Chesneau
- Laboratoire National de Référence (LBMR), Génétique des anomalies malformatives de l'œil, CHU Toulouse, Toulouse, France
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU Toulouse, Toulouse, France
| | - Sandra Whalen
- Genetique Medicale, Hopital Armand-Trousseau, Paris, France
| | - Diana Rodriguez
- Département de Génétique, Hôpitaux Universitaires Paris Ile-de-France Ouest, Paris, France
| | | | - Pauline Marzin
- Fédération de Génétique et Médecine Génomique, Service de Médecine Génomique des Maladies Rares, Necker-Enfants Malades Hospitals, Paris, France
| | - Sarah Grotto
- Maternité Port-Royal, FHU PREMA, Hôpital Cochin, Paris, France
| | - Isabelle Perthus
- Centre d'Etude des Malformations Congénitales en Auvergne, Génétique Médicale, CHU Estaing, Clermont-Ferrand, France
| | - Richard James Holt
- Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Dorine A Bax
- Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Nicola Ragge
- Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
- West Midlands Regional Genetics Service, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Nicolas Chassaing
- Laboratoire National de Référence (LBMR), Génétique des anomalies malformatives de l'œil, CHU Toulouse, Toulouse, France
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU Toulouse, Toulouse, France
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4
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Kesim Y, Ceroni F, Damián A, Blanco-Kelly F, Ayuso C, Williamson K, Paquis-Flucklinger V, Bax DA, Plaisancié J, Rieubland C, Chamlal M, Cortón M, Chassaing N, Calvas P, Ragge NK. Correction: Clinical and genetic analysis further delineates the phenotypic spectrum of ALDH1A3-related anophthalmia and microphthalmia. Eur J Hum Genet 2023; 31:1196-1198. [PMID: 37106145 PMCID: PMC10545745 DOI: 10.1038/s41431-023-01363-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Affiliation(s)
- Yesim Kesim
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Fabiola Ceroni
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Alejandra Damián
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Fiona Blanco-Kelly
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Carmen Ayuso
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Kathy Williamson
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | | | - Dorine A Bax
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Julie Plaisancié
- INSERM U1214, ToNIC, Université Toulouse III, Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France
| | - Claudine Rieubland
- Department of Human Genetics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Mostafa Chamlal
- Department of Pediatrics, RAZI-CLINIC Hospital, Tangier, Morocco
| | - Marta Cortón
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Nicolas Chassaing
- Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France
| | - Patrick Calvas
- Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France
| | - Nicola K Ragge
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK.
- Department of Clinical Genetics, West Midlands Regional Clinical Genetics Service and Birmingham Health Partners, Birmingham Women's and Children's Foundation Trust, Birmingham, UK.
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5
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Kesim Y, Ceroni F, Damián A, Blanco-Kelly F, Ayuso C, Williamson K, Paquis-Flucklinger V, Bax DA, Plaisancié J, Rieubland C, Chamlal M, Cortón M, Chassaing N, Calvas P, Ragge NK. Clinical and genetic analysis further delineates the phenotypic spectrum of ALDH1A3-related anophthalmia and microphthalmia. Eur J Hum Genet 2023; 31:1175-1180. [PMID: 36997679 PMCID: PMC10545824 DOI: 10.1038/s41431-023-01342-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 01/30/2023] [Accepted: 03/13/2023] [Indexed: 04/29/2023] Open
Abstract
Biallelic pathogenic variants in ALDH1A3 are responsible for approximately 11% of recessively inherited cases of severe developmental eye anomalies. Some individuals can display variable neurodevelopmental features, but the relationship to the ALDH1A3 variants remains unclear. Here, we describe seven unrelated families with biallelic pathogenic ALDH1A3 variants: four compound heterozygous and three homozygous. All affected individuals had bilateral anophthalmia/microphthalmia (A/M), three with additional intellectual or developmental delay, one with autism and seizures and three with facial dysmorphic features. This study confirms that individuals with biallelic pathogenic ALDH1A3 variants consistently manifest A/M, but additionally display neurodevelopmental features with significant intra- and interfamilial variability. Furthermore, we describe the first case with cataract and highlight the importance of screening ALDH1A3 variants in nonconsanguineous families with A/M.
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Affiliation(s)
- Yesim Kesim
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Fabiola Ceroni
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Alejandra Damián
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Fiona Blanco-Kelly
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Carmen Ayuso
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Kathy Williamson
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | | | - Dorine A Bax
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Julie Plaisancié
- INSERM U1214, ToNIC, Université Toulouse III, Toulouse, France
- Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France
| | - Claudine Rieubland
- Department of Human Genetics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Mostafa Chamlal
- Department of Pediatrics, RAZI-CLINIC Hospital, Tangier, Morocco
| | - Marta Cortón
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, Spain
| | - Nicolas Chassaing
- Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France
| | - Patrick Calvas
- Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France
| | - Nicola K Ragge
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK.
- Department of Clinical Genetics, West Midlands Regional Clinical Genetics Service and Birmingham Health Partners, Birmingham Women's and Children's Foundation Trust, Birmingham, UK.
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6
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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7
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Chesneau B, Ivashchenko V, Habib C, Gaston V, Escudié F, Morel G, Capri Y, Vincent-Delorme C, Calvas P, Chassaing N, Plaisancié J. Evaluation of somatic and/or germline mosaicism in congenital malformation of the eye. Eur J Hum Genet 2023; 31:526-530. [PMID: 36404347 PMCID: PMC10172375 DOI: 10.1038/s41431-022-01234-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/17/2022] [Accepted: 11/01/2022] [Indexed: 11/22/2022] Open
Abstract
Microphthalmia, Anophthalmia and Coloboma (MAC) form a spectrum of congenital eye malformations responsible for severe visual impairment. Despite the exploration of hundreds of genes by High-Throughput Sequencing (HTS), most of the patients remain without genetic diagnosis. One explanation could be the not yet demonstrated involvement of somatic mosaicism (undetected by conventional analysis pipelines) in those patients. Furthermore, the proportion of parental germline mosaicism in presumed de novo variations is still unknown in ocular malformations. Thus, using dedicated bioinformatics pipeline designed to detect mosaic variants, we reanalysed the sequencing data obtained from a 119 ocular development genes panel performed on blood samples of 78 probands with sporadic MAC without genetic diagnosis. Using the same HTS strategy, we sequenced 80 asymptomatic parents of 41 probands carrying a disease-causing variant in an ocular development gene considered de novo after Sanger sequencing of both parents. Reanalysis of the previously sequencing data did not find any mosaic variant in probands without genetic diagnosis. However, HTS of parents revealed undetected SOX2 and PAX6 mosaic variants in two parents. Finally, this work, performed on two large cohorts of patients with MAC spectrum, provides for the first time an overview of the interest of looking for mosaicism in ocular development disorders. Somatic mosaicism does not appear to be frequent in MAC spectrum and might explain only few diagnoses. Thus, other approaches such as whole genome sequencing should be considered in those patients. Parental mosaicism is however not that rare (around 5%) and challenging for genetic counselling.
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Affiliation(s)
- Bertrand Chesneau
- Service de Génétique Médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU de Toulouse, Toulouse, France
| | | | - Christophe Habib
- Service de Génétique Médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France
| | - Véronique Gaston
- Service de Génétique Médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France
| | - Fréderic Escudié
- Département d'anatomopathologie, IUCT Oncopole, Toulouse, France
| | - Godelieve Morel
- Service de Génétique Médicale, CHU de Rennes, Rennes, France
| | - Yline Capri
- Service de Génétique Médicale, Hôpital Robert Debré, APHP, Paris, France
| | | | - Patrick Calvas
- Service de Génétique Médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU de Toulouse, Toulouse, France
| | - Nicolas Chassaing
- Service de Génétique Médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU de Toulouse, Toulouse, France
| | - Julie Plaisancié
- Service de Génétique Médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France.
- Centre de Référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), CHU de Toulouse, Toulouse, France.
- INSERM U1214, ToNIC, Université Toulouse III, Toulouse, France.
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8
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Bouasker S, Patel N, Greenlees R, Wellesley D, Fares Taie L, Almontashiri NA, Baptista J, Alghamdi MA, Boissel S, Martinovic J, Prokudin I, Holden S, Mudhar HS, Riley LG, Nassif C, Attie-Bitach T, Miguet M, Delous M, Ernest S, Plaisancié J, Calvas P, Rozet JM, Khan AO, Hamdan FF, Jamieson RV, Alkuraya FS, Michaud JL, Chassaing N. Bi-allelic variants in WNT7B disrupt the development of multiple organs in humans. J Med Genet 2023; 60:294-300. [PMID: 35790350 DOI: 10.1136/jmedgenet-2022-108475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 06/11/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND Pulmonary hypoplasia, Diaphragmatic anomalies, Anophthalmia/microphthalmia and Cardiac defects delineate the PDAC syndrome. We aim to identify the cause of PDAC syndrome in patients who do not carry pathogenic variants in RARB and STRA6, which have been previously associated with this disorder. METHODS We sequenced the exome of patients with unexplained PDAC syndrome and performed functional validation of candidate variants. RESULTS We identified bi-allelic variants in WNT7B in fetuses with PDAC syndrome from two unrelated families. In one family, the fetus was homozygous for the c.292C>T (p.(Arg98*)) variant whereas the fetuses from the other family were compound heterozygous for the variants c.225C>G (p.(Tyr75*)) and c.562G>A (p.(Gly188Ser)). Finally, a molecular autopsy by proxy in a consanguineous couple that lost two babies due to lung hypoplasia revealed that both parents carry the p.(Arg98*) variant. Using a WNT signalling canonical luciferase assay, we demonstrated that the identified variants are deleterious. In addition, we found that wnt7bb mutant zebrafish display a defect of the swimbladder, an air-filled organ that is a structural homolog of the mammalian lung, suggesting that the function of WNT7B has been conserved during evolution for the development of these structures. CONCLUSION Our findings indicate that defective WNT7B function underlies a form of lung hypoplasia that is associated with the PDAC syndrome, and provide evidence for involvement of the WNT-β-catenin pathway in human lung, tracheal, ocular, cardiac, and renal development.
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Affiliation(s)
- Samir Bouasker
- Research Center, University Hospital Centre Sainte-Justine, Montreal H3T 1C5, Québec, Canada
| | - Nisha Patel
- Department of Translational Genomics, Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Rebecca Greenlees
- Eye Genetics Research Unit, Children's Medical Research Institute, University of Sydney; The Children's Hospital at Westmead, Sydney Children's Hospitals Network; and Save Sight Institute, Sydney, New South Wales, Australia
| | - Diana Wellesley
- Wessex Clinical Genetic Service, University Hospital Southampton, Southampton, UK
| | - Lucas Fares Taie
- Laboratory Genetics in Ophthalmology, INSERM UMR1163, Imagine Institute for Genetic Diseases, Université Paris Descartes-Sorbonne, Paris, Île-de-France, France
| | - Naif A Almontashiri
- Center for Genetics and Inherited Diseases (CGID), Taibah University, Madinah, Al Madinah, Saudi Arabia.,Research Department, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia
| | - Julia Baptista
- Peninsula Medical School, Faculty of Health, University of Plymouth, Plymouth, UK.,Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK
| | - Malak Ali Alghamdi
- Medical Genetic Division, Pediatric Department, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Sarah Boissel
- Research Center, University Hospital Centre Sainte-Justine, Montreal H3T 1C5, Québec, Canada
| | - Jelena Martinovic
- Unit of Fetal Pathology, APHP Hopital Antoine-Beclere, Clamart, Île-de-France, France
| | - Ivan Prokudin
- Eye Genetics Research Unit, Children's Medical Research Institute, University of Sydney; The Children's Hospital at Westmead, Sydney Children's Hospitals Network; and Save Sight Institute, Sydney, New South Wales, Australia
| | - Samantha Holden
- Department of Cellular Pathology, University Hospital Southampton, Southampton, UK
| | - Hardeep-Singh Mudhar
- National Specialist Ophthalmic Pathology Service (NSOPS), Dept of Histopathology, Royal Hallamshire Hospital, Sheffield, UK
| | - Lisa G Riley
- Rare Diseases Functional Genomics Laboratory, The Children's Hospital at Westmead, Sydney Children's Hospitals Network, Children's Medical Research Institute, University of Sydney, Sydney, New South Wales, Australia.,Specialty of Paediatrics and Child Health, Faculty of Medicine and Health, University of Sydney, Sidney, New South Wales, Australia
| | - Christina Nassif
- Research Center, University Hospital Centre Sainte-Justine, Montreal H3T 1C5, Québec, Canada
| | - Tania Attie-Bitach
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM UMR 1163, Imagine Institute for Genetic Diseases, Paris, Île-de-France, France
| | - Marguerite Miguet
- Research Center, University Hospital Centre Sainte-Justine, Montreal H3T 1C5, Québec, Canada
| | - Marion Delous
- Equipe GENDEV, Centre de Recherche en Neurosciences de Lyon, Inserm U1028, CNRS UMR5292, Université Lyon 1, Université St Etienne, Lyon, Auvergne-Rhône-Alpes, France
| | - Sylvain Ernest
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM UMR 1163, Imagine Institute for Genetic Diseases, Paris, Île-de-France, France
| | - Julie Plaisancié
- Department of Medical Genetics, Purpan University Hospital, Toulouse, Midi-Pyrénées, France.,Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, Purpan University Hospital, Toulouse, Midi-Pyrénées, France.,INSERM U1214, ToNIC, Université Toulouse III, Toulouse, France
| | - Patrick Calvas
- Department of Medical Genetics, Purpan University Hospital, Toulouse, Midi-Pyrénées, France.,Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, Purpan University Hospital, Toulouse, Midi-Pyrénées, France
| | - Jean-Michel Rozet
- Laboratory Genetics in Ophthalmology, INSERM UMR1163, Imagine Institute for Genetic Diseases, Université Paris Descartes-Sorbonne, Paris, Île-de-France, France
| | - Arif O Khan
- Eye Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, Abu Dhabi, UAE
| | - Fadi F Hamdan
- Research Center, University Hospital Centre Sainte-Justine, Montreal H3T 1C5, Québec, Canada
| | - Robyn V Jamieson
- Eye Genetics Research Unit, Children's Medical Research Institute, University of Sydney; The Children's Hospital at Westmead, Sydney Children's Hospitals Network; and Save Sight Institute, Sydney, New South Wales, Australia.,Specialty of Genomic Medicine, Faculty of Medicine and Health and Child and Adolescent Health, University of Sydney, Sydney, New South Wales, Australia
| | - Fowzan S Alkuraya
- Department of Translational Genomics, Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia .,Department of Anatomy and Cell Biology, College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia
| | - Jacques L Michaud
- Departments of Pediatrics and Neurosciences, Université de Montréal, Montreal H3T 1J4, Québec, Canada .,Departments of Pediatrics and Neurosciences, Université de Montréal, Montreal, Québec, Canada
| | - Nicolas Chassaing
- Department of Medical Genetics, Purpan University Hospital, Toulouse, Midi-Pyrénées, France .,Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, Purpan University Hospital, Toulouse, Midi-Pyrénées, France
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9
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Santorini M, Chesneau B, Koskas-Boublil P, Metge F, Caputo G, Chassaing N, Martin G, Plaisancié J. First implication of MIP in bilateral microphthalmia with persistent fetal vasculature. Am J Med Genet A 2023; 191:1373-1377. [PMID: 36734406 DOI: 10.1002/ajmg.a.63133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 01/11/2023] [Accepted: 01/14/2023] [Indexed: 02/04/2023]
Abstract
Persistent fetal vasculature (PFV) is a rare malformative ocular disorder resulting from the failure of the hyaloid vasculature to regress. The severity of the visual impairment is depending on the underlying eye defects, ranging from discreet hyaloid remnants to severe ocular anomalies. Although PFV is generally unilateral, sporadic and idiopathic, a genetic cause has been described in some individuals, especially those presenting with a bilateral and/or syndromic form of PFV. The genes occasionally described in PFV are most often responsible for a wide spectrum of ocular phenotypes such as ATOH7 or NDP, a gene also known to be involved in Norrie disease, a X-linked vitreoretinopathy with extra-ocular features. We describe here a patient with an ocular phenotype consisting in non-syndromic bilateral PFV with cataract and microphthalmia, in whom a recurrent heterozygous de novo MIP disease-causing variant was detected after using a dedicated 119-ocular genes panel approach. Defects in the MIP gene are classically associated with dominant non-syndromic congenital cataract without other ocular malformative features. Thus, this case highlights the value of exploring individuals with PFV, even those with non-syndromic forms. It also broadens the phenotypic spectrum of the MIP gene, adding new insights into the gene networks underlying PFV pathophysiology, that remains unclear.
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Affiliation(s)
- Mélissa Santorini
- Ophthalmology Department, Rothschild Foundation Hospital, Paris, France.,Ophthalmology Department, Robert Debré University Hospital, Reims, France
| | - Bertrand Chesneau
- Department of Medical Genetics, Purpan University Hospital, Toulouse, France.,National Reference Centre for the Rare Ophthalmological Disorders (CARGO), Toulouse University Hospital, Toulouse, France
| | | | - Florence Metge
- Ophthalmology Department, Rothschild Foundation Hospital, Paris, France
| | - Georges Caputo
- Ophthalmology Department, Rothschild Foundation Hospital, Paris, France
| | - Nicolas Chassaing
- Department of Medical Genetics, Purpan University Hospital, Toulouse, France.,National Reference Centre for the Rare Ophthalmological Disorders (CARGO), Toulouse University Hospital, Toulouse, France
| | - Gilles Martin
- Ophthalmology Department, Rothschild Foundation Hospital, Paris, France
| | - Julie Plaisancié
- Department of Medical Genetics, Purpan University Hospital, Toulouse, France.,National Reference Centre for the Rare Ophthalmological Disorders (CARGO), Toulouse University Hospital, Toulouse, France.,Inserm 1214 ToNIC, Purpan University Hospital, Toulouse, France
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10
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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: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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11
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Chesneau B, Plancke A, Rolland G, Marcheix B, Dulac Y, Edouard T, Plaisancié J, Aubert-Mucca M, Julia S, Langeois M, Lavabre-Bertrand T, Khau Van Kien P. A +3 variant at a donor splice site leads to a skipping of the MYH11 exon 32, a recurrent RNA defect causing Heritable Thoracic Aortic Aneurysm and Dissection and/or Patent Ductus Arteriosus. Mol Genet Genomic Med 2021; 9:e1814. [PMID: 34672437 PMCID: PMC8606209 DOI: 10.1002/mgg3.1814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 08/11/2021] [Accepted: 09/03/2021] [Indexed: 12/29/2022] Open
Abstract
Background Pathogenic variants in MYH11 are associated with either heritable thoracic aortic aneurysm and dissection (HTAAD), patent ductus arteriosus (PDA) syndrome, or megacystis‐microcolon‐intestinal hypoperistalsis syndrome (MMIHS). Methods and Results We report a family referred for molecular diagnosis with HTAAD/PDA phenotype in which we found a variant at a non‐conserved position of the 5’ donor splice site of intron 32 of MYH11 potentially altering splicing (NM_002474.3:c.4578+3A>C). Although its cosegregation with disease was observed, it remained of unknown significance. Later, aortic surgery in the proband gave us the opportunity to perform a transcript analysis. This showed a skipping of the exon 32, an RNA defect previously reported to be translated to an in‐frame loss of 71 amino acids and a dominant‐negative effect in the smooth muscle myosin rod. This RNA defect is also reported in 3 other HTAAD/PDA pedigrees. Conclusion This report confirms that among rare variants in MYH11, skipping of exon 32 is recurrent. This finding is of particular interest to establish complex genotype–phenotype correlations where some alleles are associated with autosomal dominant HTAAD/PDA, while others result in recessive or dominant visceral myopathies.
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Affiliation(s)
- Bertrand Chesneau
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Régional Universitaire de Nîmes, Nîmes, France.,Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
| | - Aurélie Plancke
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Régional Universitaire de Nîmes, Nîmes, France
| | - Guillaume Rolland
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Régional Universitaire de Nîmes, Nîmes, France
| | - Bertrand Marcheix
- Département de Chirurgie Cardiaque, Hôpital Universitaire de Rangueil, Toulouse, France
| | - Yves Dulac
- Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
| | - Thomas Edouard
- Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
| | - Julie Plaisancié
- Service de Génétique Médicale, Hôpital Universitaire de Purpan, Toulouse, France
| | - Marion Aubert-Mucca
- Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France.,Service de Génétique Médicale, Hôpital Universitaire de Purpan, Toulouse, France
| | - Sophie Julia
- Service de Génétique Médicale, Hôpital Universitaire de Purpan, Toulouse, France
| | - Maud Langeois
- Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France.,Service de Génétique Médicale, Hôpital Universitaire de Purpan, Toulouse, France
| | - Thierry Lavabre-Bertrand
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Régional Universitaire de Nîmes, Nîmes, France.,Institut des Biomolécules Max Mousseron (IBMM), CNRS UMR5247, Université de Montpellier, Montpellier, France.,Faculté de Médecine Montpellier-Nîmes, Laboratoire d'Histologie-Embryologie-Cytogénétique, Institut des Biomolécules Max Mousseron (IBMM), CNRS UMR5247, Nîmes, France
| | - Philippe Khau Van Kien
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Régional Universitaire de Nîmes, Nîmes, France.,Institut des Biomolécules Max Mousseron (IBMM), CNRS UMR5247, Université de Montpellier, Montpellier, France.,Faculté de Médecine Montpellier-Nîmes, Laboratoire d'Histologie-Embryologie-Cytogénétique, Institut des Biomolécules Max Mousseron (IBMM), CNRS UMR5247, Nîmes, France
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12
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Chesneau B, Plancke A, Rolland G, Chassaing N, Coubes C, Brischoux-Boucher E, Edouard T, Dulac Y, Aubert-Mucca M, Lavabre-Bertrand T, Plaisancié J, Khau Van Kien P. Parental mosaicism in Marfan and Ehlers-Danlos syndromes and related disorders. Eur J Hum Genet 2021; 29:771-779. [PMID: 33414558 PMCID: PMC8110803 DOI: 10.1038/s41431-020-00797-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 11/25/2020] [Accepted: 12/02/2020] [Indexed: 01/29/2023] Open
Abstract
Marfan syndrome (MFS) is a heritable connective tissue disorder (HCTD) caused by pathogenic variants in FBN1 that frequently occur de novo. Although individuals with somatogonadal mosaicisms have been reported with respect to MFS and other HCTD, the overall frequency of parental mosaicism in this pathology is unknown. In an attempt to estimate this frequency, we reviewed all the 333 patients with a disease-causing variant in FBN1. We then used direct sequencing, combined with High Resolution Melting Analysis, to detect mosaicism in their parents, complemented by NGS when a mosaicism was objectivized. We found that (1) the number of apparently de novo events is much higher than the classically admitted number (around 50% of patients and not 25% as expected for FBN1) and (2) around 5% of the FBN1 disease-causing variants were not actually de novo as anticipated, but inherited in a context of somatogonadal mosaicisms revealed in parents from three families. High Resolution Melting Analysis and NGS were more efficient at detecting and evaluating the level of mosaicism compared to direct Sanger sequencing. We also investigated individuals with a causal variant in another gene identified through our "aortic diseases genes" NGS panel and report, for the first time, on an individual with a somatogonadal mosaicism in COL5A1. Our study shows that parental mosaicism is not that rare in Marfan syndrome and should be investigated with appropriate methods given its implications in patient's management.
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Affiliation(s)
- Bertrand Chesneau
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Universitaire de Nîmes, Nîmes, France ,Centre de Référence du Syndrome de Marfan et des Syndromes Apparentés, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Aurélie Plancke
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Universitaire de Nîmes, Nîmes, France
| | - Guillaume Rolland
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Universitaire de Nîmes, Nîmes, France
| | - Nicolas Chassaing
- Service de Génétique Médicale, Hôpital Purpan, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Christine Coubes
- Service de Génétique Clinique, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Hôpital Arnaud de Villeneuve, Centre Hospitalier Universitaire de Montpellier, Montpellier, France
| | | | - Thomas Edouard
- Centre de Référence du Syndrome de Marfan et des Syndromes Apparentés, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Yves Dulac
- Centre de Référence du Syndrome de Marfan et des Syndromes Apparentés, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Marion Aubert-Mucca
- Centre de Référence du Syndrome de Marfan et des Syndromes Apparentés, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, Toulouse, France ,Service de Génétique Médicale, Hôpital Purpan, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Thierry Lavabre-Bertrand
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Universitaire de Nîmes, Nîmes, France
| | - Julie Plaisancié
- Centre de Référence du Syndrome de Marfan et des Syndromes Apparentés, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, Toulouse, France ,Service de Génétique Médicale, Hôpital Purpan, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Philippe Khau Van Kien
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Universitaire de Nîmes, Nîmes, France
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13
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Aubert-Mucca M, Pernin-Grandjean J, Marchasson S, Gaston V, Habib C, Meunier I, Sigaudy S, Kaplan J, Roche O, Denis D, Bitoun P, Haye D, Verloes A, Calvas P, Chassaing N, Plaisancié J. Confirmation of FZD5 implication in a cohort of 50 patients with ocular coloboma. Eur J Hum Genet 2020; 29:131-140. [PMID: 32737437 DOI: 10.1038/s41431-020-0695-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 07/01/2020] [Accepted: 07/07/2020] [Indexed: 11/09/2022] Open
Abstract
Defects in optic fissure closure can lead to congenital ocular coloboma. This ocular malformation, often associated with microphthalmia, is described in various clinical forms with different inheritance patterns and genetic heterogeneity. In recent times, the identification of an increased number of genes involved in numerous cellular functions has led to a better understanding in optic fissure closure mechanisms. Nevertheless, most of these genes are also involved in wider eye growth defects such as micro-anophthalmia, questioning the mechanisms controlling both extension and severity of optic fissure closure defects. However, some genes, such as FZD5, have only been so far identified in isolated coloboma. Thus, to estimate the frequency of implication of different ocular genes, we screened a cohort of 50 patients affected by ocular coloboma by using targeted sequencing of 119 genes involved in ocular development. This analysis revealed seven heterozygous (likely) pathogenic variants in RARB, MAB21L2, RBP4, TFAP2A, and FZD5. Surprisingly, three out of the seven variants detected herein were novel disease-causing variants in FZD5 identified in three unrelated families with dominant inheritance. Although molecular diagnosis rate remains relatively low in patients with ocular coloboma (14% (7/50) in this work), these results, however, highlight the importance of genetic screening, especially of FZD5, in such patients. Indeed, in our series, FZD5 variants represent half of the genetic causes, constituting 6% (3/50) of the patients who benefited from a molecular diagnosis. Our findings support the involvement of FZD5 in ocular coloboma and provide clues for screening this gene during current diagnostic procedures.
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Affiliation(s)
- Marion Aubert-Mucca
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France
| | | | | | - Veronique Gaston
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France
| | - Christophe Habib
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France
| | - Isabelle Meunier
- Centre de Référence des Maladies Sensorielles Génétiques, Hôpital Gui de Chauliac, Institut de Neurosciences de Montpellier, INSERM U1051, Université de Montpellier, Montpellier, France
| | - Sabine Sigaudy
- Département de Génétique Médicale, AP-HM, CHU Timone Enfants, Marseille, France
| | - Josseline Kaplan
- Laboratoire de Génétique Ophtalmologique, INSERM U1163 Institut Imagine, Paris, France
| | - Olivier Roche
- Département d'Ophtalmologie, IHU Necker-Enfants-Malades, Université Paris-Descartes, Paris, France
| | - Danièle Denis
- Institut de Neurosciences de la Timone (INT), Centre National de la Recherche Scientifique (CNRS), Aix-Marseille Université (AMU), Marseille, France
| | - Pierre Bitoun
- Département d'Ophtalmologie, SIDVA 91, Juvisy-sur-Orge, France
| | - Damien Haye
- Département de Génétique, Hôpital Robert Debré, Paris, France
| | - Alain Verloes
- Département de Génétique, Hôpital Robert Debré, Paris, France
| | - Patrick Calvas
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France.,INSERM U1056, UDEAR, Equipe 4, Université Toulouse III, Toulouse, France.,Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France
| | - Nicolas Chassaing
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France.,INSERM U1056, UDEAR, Equipe 4, Université Toulouse III, Toulouse, France.,Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France
| | - Julie Plaisancié
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France. .,INSERM U1056, UDEAR, Equipe 4, Université Toulouse III, Toulouse, France. .,Centre de Référence des Affections Rares en Génétique Ophtalmologique CARGO, Site Constitutif, CHU Toulouse, Toulouse, France.
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14
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Dubucs C, Chassaing N, Sergi C, Aubert-Mucca M, Attié-Bitach T, Lacombe D, Thauvin-Robinet C, Arpin S, Perez MJ, Cabrol C, Chen CP, Aziza J, Colin E, Martinovic J, Calvas P, Plaisancié J. Re-focusing on Agnathia-Otocephaly complex. Clin Oral Investig 2020; 25:1353-1362. [PMID: 32643087 DOI: 10.1007/s00784-020-03443-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 07/03/2020] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Agnathia-otocephaly complex is a rare condition characterized by mandibular hypoplasia or agnathia, ear anomalies (melotia/synotia) and microstomia with aglossia. This severe anomaly of the first branchial arch is most often lethal. The estimated incidence is less than 1 in 70.000 births, with etiologies linked to both genetic and teratogenic factors. Most of the cases are sporadic. To date, two genes have been described in humans to be involved in this condition: OTX2 and PRRX1. Nevertheless, the overall proportion of mutated cases is unknown and a significant number of patients remain without molecular diagnosis. Thus, the involvement of other genes than OTX2 and PRRX1 in the agnathia-otocephaly complex is not unlikely. Heterozygous mutations in Cnbp in mice are responsible for mandibular and eye defects mimicking the agnathia-otocephaly complex in humans and appear as a good candidate. Therefore, in this study, we aimed (i) to collect patients presenting with agnathia-otocephaly complex for screening CNBP, in parallel with OTX2 and PRRX1, to check its possible implication in the human phenotype and (ii) to compare our results with the literature data to estimate the proportion of mutated cases after genetic testing. MATERIALS AND METHODS In this work, we describe 10 patients suffering from the agnathia-otocephaly complex. All of them benefited from array-CGH and Sanger sequencing of OTX2, PRRX1 and CNBP. A complete review of the literature was made using the Pubmed database to collect all the patients described with a phenotype of agnathia-otocephaly complex during the 20 last years (1998-2019) in order (i) to study etiology (genetic causes, iatrogenic causes…) and (ii), when genetic testing was performed, to study which genes were tested and by which type of technologies. RESULTS In our 10 patients' cohort, no point mutation in the three tested genes was detected by Sanger sequencing, while array-CGH has allowed identifying a 107-kb deletion encompassing OTX2 responsible for the agnathia-otocephaly complex phenotype in 1 of them. In 4 of the 70 cases described in the literature, a toxic cause was identified and 22 out the 66 remaining cases benefited from genetic testing. Among those 22 patients, 6 were carrying mutation or deletion in the OTX2 gene and 4 in the PRRX1 gene. Thus, when compiling results from our cohort and the literature, a total of 32 patients benefited from genetic testing, with only 34% (11/32) of patients having a mutation in one of the two known genes, OTX2 or PRRX1. CONCLUSIONS From our work and the literature review, only mutations in OTX2 and PRRX1 have been found to date in patients, explaining around one third of the etiologies after genetic testing. Thus, agnathia-otocephaly complex remains unexplained in the majority of the patients, which indicates that other factors might be involved. Although involved in first branchial arch defects, no mutation in the CNBP gene was found in this study. This suggests that mutations in CNBP might not be involved in such phenotype in humans or that, unlike in mice, a compensatory effect might exist in humans. Nevertheless, given that agnathia-otocephaly complex is a rare phenotype, more patients have to be screened for CNBP mutations before we definitively conclude about its potential implication. Therefore, this work presents the current state of knowledge on agnathia-otocephaly complex and underlines the need to expand further the understanding of the genetic bases of this disorder, which remains largely unknown. CLINICAL RELEVANCE We made here an update and focus on the clinical and genetic aspects of agnathia-otocephaly complex as well as a more general review of craniofacial development.
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Affiliation(s)
- C Dubucs
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France.,Département d'Anatomie et de Cytologie Pathologiques, Institut Universitaire du cancer de Toulouse, Toulouse, France
| | - N Chassaing
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France.,INSERM U1056, Université Toulouse III, Toulouse, France
| | - C Sergi
- Department of Lab. Med. & Pathology (5B4.09), University of Alberta, Edmonton, AB, Canada
| | - M Aubert-Mucca
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France
| | - T Attié-Bitach
- Unité d'Embryofœtopathologie, Service d'Histologie Embryologie Cytogénétique, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris (APHP), Paris, France.,Institut Imagine, INSERM U1163, Université Paris Descartes, Sorbonne Paris Cite, Paris, France
| | - D Lacombe
- Service de Génétique Médicale, CRMR, CHU de Bordeaux, Bordeaux, France.,INSERM U1211, Université de Bordeaux, 33076, Bordeaux, France
| | - C Thauvin-Robinet
- UMR1231 GAD, Inserm - Université Bourgogne-Franche Comté, Dijon, France.,Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, CHU Dijon, Dijon, Bourgogne, France.,Centre de Référence maladies rares "Anomalies du Développement et syndromes malformatifs," Centre de Génétique, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
| | - S Arpin
- Service de Génétique Clinique, Centre Hospitalier Régional Universitaire de Tours, Tours, France
| | - M J Perez
- Department of Medical Genetics, Reference Center for Developmental Abnormalities and Constitutional Bone Diseases, CHRU, Montpellier, France
| | - C Cabrol
- Centre de Génétique Humaine, Centre Hospitalier Universitaire, Université de Franche-Comté, Besançon, France
| | - C P Chen
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - J Aziza
- Département d'Anatomie et de Cytologie Pathologiques, Institut Universitaire du cancer de Toulouse, Toulouse, France
| | - E Colin
- Department de Biochimie et Génétique, Centre Hospitalier Universitaire, Angers, France.,UMR CNRS 6214-INSERM 1083 and PREMMI, Université d'Angers, Angers, France
| | - J Martinovic
- Unit of Fetal Pathology, AP-HP Antoine Béclère Hospital, Clamart, France
| | - P Calvas
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France.,INSERM U1056, Université Toulouse III, Toulouse, France
| | - Julie Plaisancié
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France. .,INSERM U1056, Université Toulouse III, Toulouse, France.
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15
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Chesneau B, Edouard T, Dulac Y, Colineaux H, Langeois M, Hanna N, Boileau C, Arnaud P, Chassaing N, Julia S, Jondeau G, Plancke A, Khau Van Kien P, Plaisancié J. Clinical and genetic data of 22 new patients with SMAD3 pathogenic variants and review of the literature. Mol Genet Genomic Med 2020; 8:e1132. [PMID: 32154675 PMCID: PMC7216810 DOI: 10.1002/mgg3.1132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 01/07/2020] [Indexed: 12/23/2022] Open
Abstract
Background Pathogenic SMAD3 variants are responsible for a cardiovascular phenotype, mainly thoracic aortic aneurysms and dissections. Precocious identification of the vascular risk such as aortic dilatation in mutated patients has a major impact in terms of management, particularly to avoid dissection and sudden death. These vascular damages are classically associated with premature osteoarthritis and skeletal abnormalities. However, variable expressivity and incomplete penetrance are common with SMAD3 variants. Methods To investigate the clinical variability observed within SMAD3 patients, we reviewed the phenotypic and genetic data of 22 new patients from our Centre and of 133 patients reported in the literature. From this cohort of 155 mutated individuals, we first aimed to delineate an estimated frequency of the main clinical signs associated with SMAD3 pathogenic variants and, then, to look for genotype‐phenotype correlations, mainly to see if the aortic phenotype (AP) could be predicted by the SMAD3 variant type. Results We showed, herein, the absence of correlation between the SMAD3 variant type and the occurrence of an AP in patients. Conclusion Therefore, this report brings additional data for the genotype‐phenotype correlations of SMAD3 variants and the need to explore in more detail the effects of genetic modifiers that could influence the phenotype.
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Affiliation(s)
- Bertrand Chesneau
- Service de génétique médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France.,Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
| | - Thomas Edouard
- Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
| | - Yves Dulac
- Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
| | - Hélène Colineaux
- Département d'épidémiologie, d'économie de la santé et de santé publique, CHU de Toulouse, Toulouse, France.,LEASP UMR1027, INSERM, Université Toulouse III, Toulouse, France
| | - Maud Langeois
- Service de génétique médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France.,Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
| | - Nadine Hanna
- Centre de Référence pour le syndrome de Marfan et apparentés, AP-HP, Hôpital Bichat, Faculté Paris Diderot, LVTS INSERM U1148, Paris, France
| | - Catherine Boileau
- Centre de Référence pour le syndrome de Marfan et apparentés, AP-HP, Hôpital Bichat, Faculté Paris Diderot, LVTS INSERM U1148, Paris, France
| | - Pauline Arnaud
- Centre de Référence pour le syndrome de Marfan et apparentés, AP-HP, Hôpital Bichat, Faculté Paris Diderot, LVTS INSERM U1148, Paris, France
| | - Nicolas Chassaing
- Service de génétique médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France
| | - Sophie Julia
- Service de génétique médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France
| | - Guillaume Jondeau
- Centre de Référence pour le syndrome de Marfan et apparentés, AP-HP, Hôpital Bichat, Faculté Paris Diderot, LVTS INSERM U1148, Paris, France
| | - Aurélie Plancke
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Régional Universitaire de Nîmes, Nîmes, France
| | - Philippe Khau Van Kien
- UF de Génétique Médicale et Cytogénétique, Centre Hospitalier Régional Universitaire de Nîmes, Nîmes, France
| | - Julie Plaisancié
- Service de génétique médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France.,Centre de Référence du syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
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16
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Dulac Y, Chesneau B, Vincent R, Edouard T, Khau Van Kien P, Guitarte A, Karsenty C, Plaisancié J. Clinical and genetic data of 20 new patients with SMAD3 mutations, type 3 Loeys Dietz Syndrome (LDS), and reviews of the literature. Archives of Cardiovascular Diseases Supplements 2020. [DOI: 10.1016/j.acvdsp.2019.09.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Dulac Y, Chesneau B, Vincent R, Edouard T, Guitarte A, Karsenty C, Khau Van Kien P, Plaisancié J. Clinical and genetic data of 20 new patients with SMAD3 mutations type 3 Loeys Dietz syndrome (LDS) and reviews of the literature. Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2019.06.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Plaisancié J, Tarilonte M, Ramos P, Jeanton-Scaramouche C, Gaston V, Dollfus H, Aguilera D, Kaplan J, Fares-Taie L, Blanco-Kelly F, Villaverde C, Francannet C, Goldenberg A, Arroyo I, Rozet JM, Ayuso C, Chassaing N, Calvas P, Corton M. Implication of non-coding PAX6 mutations in aniridia. Hum Genet 2018; 137:831-846. [PMID: 30291432 DOI: 10.1007/s00439-018-1940-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 09/23/2018] [Indexed: 01/14/2023]
Abstract
There is an increasing implication of non-coding regions in pathological processes of genetic origin. This is partly due to the emergence of sophisticated techniques that have transformed research into gene expression by allowing a more global understanding of the genome, both at the genomic, epigenomic and chromatin levels. Here, we implemented the analysis of PAX6, whose coding loss-of-function variants are mainly implied in aniridia, by studying its non-coding regions (untranslated regions, introns and cis-regulatory sequences). In particular, we have taken advantage of the development of high-throughput approaches to screen the upstream and downstream regulatory regions of PAX6 in 47 aniridia patients without identified mutation in the coding sequence. This was made possible through the use of custom targeted resequencing and/or CGH array to analyze the entire PAX6 locus on 11p13. We found candidate variants in 30 of the 47 patients. 9/30 correspond to the well-known described 3' deletions encompassing SIMO and other enhancer elements. In addition, we identified numerous different variants in various non-coding regions, in particular untranslated regions. Among these latter, most of them demonstrated an in vitro functional effect using a minigene strategy, and 12/21 are thus considered as causative mutations or very likely to explain the phenotypes. This new analysis strategy brings molecular diagnosis to more than 90% of our aniridia patients. This study revealed an outstanding mutation pattern in non-coding PAX6 regions confirming that PAX6 remains the major gene for aniridia.
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Affiliation(s)
- Julie Plaisancié
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France.
- INSERM U1056, Université Toulouse III, Toulouse, France.
| | - M Tarilonte
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - P Ramos
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - C Jeanton-Scaramouche
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France
| | - V Gaston
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France
| | - H Dollfus
- Centre de Référence pour les affections rares en génétique ophtalmologique, CARGO, Filière SENSGENE, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - D Aguilera
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - J Kaplan
- Laboratoire de Génétique Ophtalmologique INSERM U1163, Institut Imagine, Paris, France
| | - L Fares-Taie
- Laboratoire de Génétique Ophtalmologique INSERM U1163, Institut Imagine, Paris, France
| | - F Blanco-Kelly
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - C Villaverde
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - C Francannet
- Service de Génétique Médicale, CHU Estaing, Clermont-Ferrand, France
| | - A Goldenberg
- Service de Génétique, CHU de Rouen, Centre Normand de Génomique Médicale et Médecine Personnalisée, Rouen, France
| | - I Arroyo
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
- Department of Genetics, Hospital of Cáceres, Cáceres, Spain
| | - J M Rozet
- Laboratoire de Génétique Ophtalmologique INSERM U1163, Institut Imagine, Paris, France
| | - C Ayuso
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
| | - N Chassaing
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France
- INSERM U1056, Université Toulouse III, Toulouse, France
| | - P Calvas
- Service de Génétique Médicale, Pavillon Lefebvre, Hôpital Purpan, CHU Toulouse, Place du Dr Baylac, 31059, Toulouse Cedex 9, France
- INSERM U1056, Université Toulouse III, Toulouse, France
| | - M Corton
- Department of Genetics, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz University Hospital-Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), ISCIII, Madrid, Spain
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Plaisancié J, Ragge N, Dollfus H, Kaplan J, Lehalle D, Francannet C, Morin G, Colineaux H, Calvas P, Chassaing N. FOXE3
mutations: genotype-phenotype correlations. Clin Genet 2018; 93:837-845. [DOI: 10.1111/cge.13177] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 08/21/2017] [Accepted: 08/22/2017] [Indexed: 01/25/2023]
Affiliation(s)
- J. Plaisancié
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse; Toulouse France
- INSERM U1056; Université Toulouse III; Toulouse France
| | - N.K. Ragge
- Faculty of Health and Life Sciences; Oxford Brookes University; Oxford UK
- West Midlands Regional Genetics Service; Birmingham Women and Children’s NHS Foundation Trust; Birmingham UK
| | - H. Dollfus
- Centre de Référence pour les affections rares en génétique ophtalmologique; CARGO, Filière SENSGENE, Hôpitaux Universitaires de Strasbourg; Strasbourg France
| | - J. Kaplan
- INSERM U1163; Génétique Ophtalmologique; Paris France
| | - D. Lehalle
- Centre de Génétique et Centre de Référence "Anomalies du Développement et Syndromes Malformatifs; Hôpital d'Enfants; Dijon France
| | - C. Francannet
- Service de Génétique Médicale; CHU Estaing; Clermont-Ferrand France
| | - G. Morin
- Service de génétique; Hôpital nord d’Amiens; Amiens France
| | - H. Colineaux
- Department of Epidemiology, Health Economics and Public Health; Toulouse University Hospital; France
- LEASP UMR1027, INSERM; Université Toulouse III; Toulouse France
| | - P. Calvas
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse; Toulouse France
- INSERM U1056; Université Toulouse III; Toulouse France
| | - N. Chassaing
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse; Toulouse France
- INSERM U1056; Université Toulouse III; Toulouse France
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20
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Zazo Seco C, Plaisancié J, Lupasco T, Michot C, Pechmeja J, Delanne J, Cottereau E, Ayuso C, Corton M, Calvas P, Ragge N, Chassaing N. Identification of PITX3 mutations in individuals with various ocular developmental defects. Ophthalmic Genet 2018; 39:314-320. [PMID: 29405783 DOI: 10.1080/13816810.2018.1430243] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Congenital cataract displays large phenotypic (syndromic and isolated cataracts) and genetic heterogeneity. Mutations in several transcription factors involved in eye development, like PITX3, have been associated with congenital cataracts and anterior segment mesenchymal disorders. MATERIALS AND METHODS Targeted sequencing of 187 genes involved in ocular development was performed in 96 patients with mainly anophthalmia and microphthalmia. Additionally, Sanger sequencing analysis of PITX3 was performed on a second cohort of 32 index cases with congenital cataract and Peters anomaly and/or sclereocornea. RESULTS We described five families with four different PITX3 mutations, two of which were novel. In Family 1, the heterozygous recurrent c.640_656dup (p.Gly220Profs*95) mutation cosegregated with eye anomalies ranging from congenital cataract to Peters anomaly. In Family 2, the novel c.669del [p.(Leu225Trpfs*84)] mutation cosegregated with dominantly inherited eye anomalies ranging from posterior embryotoxon to congenital cataract in heterozygous carriers and congenital sclereocornea and cataract in a patient homozygous for this mutation. In Family 3, we identified the recurrent heterozygous c.640_656dup (p.Gly220Profs*95) mutation segregating with congenital cataract. In Family 4, the de novo c.582del [p.(Ile194Metfs*115)] mutation was identified in a patient with congenital cataract, microphthalmia, developmental delay and autism. In Family 5, the c.38G>A (p.Ser13Asn) mutation segregated dominantly in a family with Peters anomaly, which is a novel phenotype associated with the c.38G>A variant compared with the previously reported isolated congenital cataract. CONCLUSIONS Our study unveils different phenotypes associated with known and novel mutations in PITX3, which will improve the genetic counselling of patients and their families.
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Affiliation(s)
- Celia Zazo Seco
- a UDEAR , Université de Toulouse, UMRS 1056 INSERM-Université Paul Sabatier , Toulouse , France
| | - Julie Plaisancié
- a UDEAR , Université de Toulouse, UMRS 1056 INSERM-Université Paul Sabatier , Toulouse , France.,b Service de Génétique Médicale , Hôpital Purpan, CHU , Toulouse , France
| | - Tatiana Lupasco
- a UDEAR , Université de Toulouse, UMRS 1056 INSERM-Université Paul Sabatier , Toulouse , France
| | - Caroline Michot
- c INSERM UMR1163 Unit, Department of Genetics , Institut Imagine, Paris Descartes University-Sorbonne Paris Cité, Necker Enfants-Malades Hospital , Paris , France
| | - Jacmine Pechmeja
- d Service d'ophtalmologie , Hôpital Purpan, CHU , Toulouse , France
| | - Julian Delanne
- e Centre de Génétique et Centre de référence «Anomalies du Développement et Syndromes Malformatifs» , Hôpital d'Enfants, Centre Hospitalier Universitaire de Dijon , Dijon , France
| | | | - Carmen Ayuso
- g Genetics Service , IIS - Fundación Jiménez Díaz University Hospital, CIBERER, (IIS-FJD, UAM) , Madrid , Spain
| | - Marta Corton
- g Genetics Service , IIS - Fundación Jiménez Díaz University Hospital, CIBERER, (IIS-FJD, UAM) , Madrid , Spain
| | - Patrick Calvas
- a UDEAR , Université de Toulouse, UMRS 1056 INSERM-Université Paul Sabatier , Toulouse , France.,b Service de Génétique Médicale , Hôpital Purpan, CHU , Toulouse , France
| | - Nicola Ragge
- h Department of Biological and Medical Sciences, Faculty of Health and Life Sciences , Oxford Brookes University , Oxford , UK.,i West Midlands Regional Clinical Genetics Service and Birmingham Health Partners , Birmingham Women and Children's Hospital NHS Foundation Trust , Birmingham , UK
| | - Nicolas Chassaing
- a UDEAR , Université de Toulouse, UMRS 1056 INSERM-Université Paul Sabatier , Toulouse , France.,b Service de Génétique Médicale , Hôpital Purpan, CHU , Toulouse , France
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21
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Bessis D, Plaisancié J, Gaston V, Bieth E. Fibroblast Growth Factor Receptor 3 Epidermal Naevus Syndrome with Urothelial Mosaicism for the Activating p.Ser249Cys FGFR3 Mutation. Acta Derm Venereol 2017; 97:402-403. [PMID: 27786351 DOI: 10.2340/00015555-2554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Didier Bessis
- Department of Dermatology, University of Montpellier I, Hôpital Saint-Eloi, CHU de Montpellier, 80, avenue Augustin Fliche, FR-34295 Montpellier, France. , ,
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22
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Chassaing N, Ragge N, Plaisancié J, Patat O, Geneviève D, Rivier F, Malrieu-Eliaou C, Hamel C, Kaplan J, Calvas P. Confirmation of TENM3 involvement in autosomal recessive colobomatous microphthalmia. Am J Med Genet A 2016; 170:1895-8. [PMID: 27103084 DOI: 10.1002/ajmg.a.37667] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 04/07/2016] [Indexed: 11/11/2022]
Abstract
Anophthalmia and microphthalmia are the most severe malformations of the eye, referring to a congenital absence, and a reduced size of the eyeball respectively. More than 20 genes have been shown to be mutated in patients with syndromic and non-syndromic forms of anophthalmia-microphthalmia. In a recent study combining autozygome and exome analysis, a homozygous loss of function mutation in TENM3 (previously named ODZ3) was reported in two siblings with isolated bilateral colobomatous microphthalmia from a consanguineous Saudi family. Herein, we report a third patient (not related to the previously reported family) with bilateral colobomatous microphthalmia and developmental delay in whom genetic studies identified a homozygous TENM3 splicing mutation c.2968-2A>T (p.Val990Cysfs*13). This report supports the association of TENM3 mutations with colobomatous microphthalmia and expands the phenotypic spectrum associated with mutations in this gene. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Nicolas Chassaing
- CHU Toulouse, Service de Génétique Médicale, Hôpital Purpan, Toulouse, France.,UDEAR, Université de Toulouse, Inserm, UPS, CNRS, Toulouse, France
| | - Nicola Ragge
- Birmingham Women's Hospital Clinical Genetics Unit, Birmingham, UK.,School of Life Sciences, Oxford Brookes University, Oxford, UK
| | - Julie Plaisancié
- CHU Toulouse, Service de Génétique Médicale, Hôpital Purpan, Toulouse, France
| | - Oliver Patat
- CHU Toulouse, Service de Génétique Médicale, Hôpital Purpan, Toulouse, France
| | - David Geneviève
- CHRU Montpellier, Service de Génétique Médicale, Montpellier, France
| | - François Rivier
- CHRU Montpellier, Service de Neuropédiatrie, Montpellier, France
| | | | - Christian Hamel
- CHRU Montpellier, Maladies Sensorielles Génétiques, Montpellier, France
| | | | - Patrick Calvas
- CHU Toulouse, Service de Génétique Médicale, Hôpital Purpan, Toulouse, France.,UDEAR, Université de Toulouse, Inserm, UPS, CNRS, Toulouse, France
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23
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Masset H, Hestand MS, Van Esch H, Kleinfinger P, Plaisancié J, Afenjar A, Molignier R, Schluth-Bolard C, Sanlaville D, Vermeesch JR. A Distinct Class of Chromoanagenesis Events Characterized by Focal Copy Number Gains. Hum Mutat 2016; 37:661-8. [DOI: 10.1002/humu.22984] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 02/24/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Heleen Masset
- Department of Human Genetics; KU Leuven; Leuven Belgium
| | | | | | - Pascale Kleinfinger
- Laboratoire Cerba; Département de Génétique Humaine; Saint-Ouen l'Aumône France
| | - Julie Plaisancié
- Service de Génétique Médicale; Hôpital Purpan; CHU Toulouse France
| | - Alexandra Afenjar
- APHP; Hôpital Armand-Trousseau; Service de Génétique Clinique; Paris France
- APHP; Hôpital Armand-Trousseau; Service de Neuropédiatrie; Paris France
| | - Romain Molignier
- Laboratoire de Biologie Clinique; Clinique Saint Jean Languedoc; Toulouse France
| | - Caroline Schluth-Bolard
- Laboratoire de Cytogénétique Constitutionnelle; Hospices Civils de Lyon; France
- Lyon Neuroscience Research Center; CNRS UMR5292, INSERM U1028, UCBL Lyon France
| | - Damien Sanlaville
- Laboratoire de Cytogénétique Constitutionnelle; Hospices Civils de Lyon; France
- Lyon Neuroscience Research Center; CNRS UMR5292, INSERM U1028, UCBL Lyon France
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De Potter MJ, Edouard T, Amadieu R, Plaisancié J, Julia S, Hadeed K, Hascoët S, Acar P, Dulac Y. [Loeys-Dietz syndrome (TGFβR2 mutation) in a 4-year-old child with thoracic aortic aneurysm]. Arch Pediatr 2016; 23:504-7. [PMID: 27017362 DOI: 10.1016/j.arcped.2016.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 10/23/2015] [Accepted: 02/09/2016] [Indexed: 10/22/2022]
Abstract
Loeys-Dietz syndrome is a rare form of connective tissue disorder, whose clinical features can resemble those of Marfan syndrome, but with a more unpolished appearance. Recently brought out, this pathology remains little known; however, its consequences may be dramatic. We report on the case of a 4-year-old girl followed for a congenital hip dislocation, in which a systematic exam found increased cutaneous elasticity and a bifid uvula, suggesting a connective tissue disorder. Symptoms were unpolished, as the child's height was normal, without any positive cardiac, rheumatological, or ophthalmological family history. Cardiovascular tests found a thoracic aortic aneurysm at the Valsalva sinus (26mm, Z-score=+4.24). A genetic investigation found a TGFβR2 gene mutation, leading to the diagnosis of Loeys-Dietz syndrome type 2. Skeletal damage associated with bifid uvula and/or hypertelorism and an aneurysm of the ascending aorta should guide the genetic investigation to the search for TGF-β vasculopathy such as Loeys-Dietz syndrome.
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Affiliation(s)
- M-J De Potter
- Service de cardiologie pédiatrique, centre de compétence du syndrome de Marfan et des syndromes apparentés, hôpital des Enfants, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France
| | - T Edouard
- Service d'endocrinologie pédiatrique, centre de compétence du syndrome de Marfan et des syndromes apparentés, hôpital des Enfants, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France
| | - R Amadieu
- Service de cardiologie pédiatrique, centre de compétence du syndrome de Marfan et des syndromes apparentés, hôpital des Enfants, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France
| | - J Plaisancié
- Service de génétique médicale, centre de compétence du syndrome de Marfan et des syndromes apparentés, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France
| | - S Julia
- Service de génétique médicale, centre de compétence du syndrome de Marfan et des syndromes apparentés, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France
| | - K Hadeed
- Service de cardiologie pédiatrique, centre de compétence du syndrome de Marfan et des syndromes apparentés, hôpital des Enfants, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France
| | - S Hascoët
- Service de cardiologie pédiatrique, centre de compétence du syndrome de Marfan et des syndromes apparentés, hôpital des Enfants, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France
| | - P Acar
- Service de cardiologie pédiatrique, centre de compétence du syndrome de Marfan et des syndromes apparentés, hôpital des Enfants, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France
| | - Y Dulac
- Service de cardiologie pédiatrique, centre de compétence du syndrome de Marfan et des syndromes apparentés, hôpital des Enfants, CHU de Toulouse, 330, avenue de Grande-Bretagne, 31026 Toulouse cedex 3, France.
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Plaisancié J, Kleinfinger P, Cances C, Bazin A, Julia S, Trost D, Lohmann L, Vigouroux A. Constitutional chromoanasynthesis: description of a rare chromosomal event in a patient. Eur J Med Genet 2014; 57:567-70. [PMID: 25128687 DOI: 10.1016/j.ejmg.2014.07.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 07/30/2014] [Indexed: 11/24/2022]
Abstract
Structural alterations in chromosomes are a frequent cause of cancers and congenital diseases. Recently, the phenomenon of chromosome crisis, consisting of a set of tens to hundreds of clustered genomic rearrangements, localized in one or a few chromosomes, was described in cancer cells under the term chromothripsis. Better knowledge and recognition of this catastrophic chromosome event has brought to light two distinct entities, chromothripsis and chromoanasynthesis. The complexity of these rearrangements and the original descriptions in tumor cells initially led to the thought that it was an acquired anomaly. In fact, a few patients have been reported with constitutional chromothripsis or chromoanasynthesis. Using microarray we identified a very complex chromosomal rearrangement in a patient who had a cytogenetically visible rearrangement of chromosome 18. The rearrangement contained more than 15 breakpoints localized on a single chromosome. Our patient displayed intellectual disability, behavioral troubles and craniofacial dysmorphism. Interestingly, the succession of duplications and triplications identified in our patient was not clustered on a single chromosomal region but spread over the entire chromosome 18. In the light of this new spectrum of chromosomal rearrangements, this report outlines the main features of these catastrophic events and discusses the underlying mechanism of the complex chromosomal rearrangement identified in our patient, which is strongly evocative of a chromoanasynthesis.
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Affiliation(s)
- Julie Plaisancié
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, France.
| | - Pascale Kleinfinger
- Laboratoire Cerba, Département de Génétique Humaine, Saint-Ouen l'Aumône, France
| | - Claude Cances
- Service de Neuropédiatrie, Hôpital des Enfants, CHU Toulouse, France
| | - Anne Bazin
- Laboratoire Cerba, Département de Génétique Humaine, Saint-Ouen l'Aumône, France
| | - Sophie Julia
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, France
| | - Detlef Trost
- Laboratoire Cerba, Département de Génétique Humaine, Saint-Ouen l'Aumône, France
| | - Laurence Lohmann
- Laboratoire Cerba, Département de Génétique Humaine, Saint-Ouen l'Aumône, France
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Plaisancié J, Collet C, Pelletier V, Perdomo Y, Studer F, Fradin M, Schaefer E, Speeg-Schatz C, Bloch-Zupan A, Flori E, Dollfus H. MSX2 Gene Duplication in a Patient with Eye Development Defects. Ophthalmic Genet 2014; 36:353-8. [PMID: 24666290 DOI: 10.3109/13816810.2014.886270] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND MSX2 mutations are a very rare cause of craniosynostosis. Gain-of-function mutations may lead to the Boston-type craniosynostosis with limb defects and refraction errors, whereas loss-of-function mutations causes primary osseous defects such as enlarged parietal foramina. MATERIALS AND METHODS Herein we report the case of a child with bicoronal synostosis and cutaneous syndactylies, who presented iridal and chorioretinal colobomas. Due to the craniofacial features that were prominent in the clinical picture, the genes involved in craniosynostosis were explored. RESULTS The patient disclosed an intragenic duplication of the entire MSX2 gene whereas no mutation was identified in any major genes known to be involved in craniosynostosis. CONCLUSION This is the first report of an eye development defect due to an increase in the MSX2 copy number in a human being. The implication of this gene in eye development has already been shown in several animal models. Indeed, overexpression of the Msx2 gene in a mouse model resulted also in optic nerve aplasia and microphthalmia. This report expands the phenotypic spectrum of the MSX2 mutations impacting early ocular development knowledge.
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Affiliation(s)
- Julie Plaisancié
- a Centre de référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), Hôpital Civil , Strasbourg , France
| | - Corinne Collet
- b Service de Biochimie et Biologie Moléculaire, Hôpital Lariboisière , Paris , France
| | - Valerie Pelletier
- a Centre de référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), Hôpital Civil , Strasbourg , France
| | - Yaumara Perdomo
- a Centre de référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), Hôpital Civil , Strasbourg , France
| | - Fouzia Studer
- a Centre de référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), Hôpital Civil , Strasbourg , France
| | - Mélanie Fradin
- c Service de Génétique Médicale, Hôpital de Hautepierre , Strasbourg , France
| | - Elise Schaefer
- c Service de Génétique Médicale, Hôpital de Hautepierre , Strasbourg , France
| | | | - Agnès Bloch-Zupan
- e Reference Centre for Orodental Manifestations of Rare Diseases, Pôle de Médecine et Chirurgie Bucco-Dentaires, Hôpitaux Universitaires de Strasbourg , Strasbourg , France
| | - Elisabeth Flori
- f Laboratoire de Cytogénétique , Hôpital de Hautepierre , Strasbourg , France , and
| | - Hélène Dollfus
- a Centre de référence pour les Affections Rares en Génétique Ophtalmologique (CARGO), Hôpital Civil , Strasbourg , France .,c Service de Génétique Médicale, Hôpital de Hautepierre , Strasbourg , France .,g Laboratoire de Génétique Médicale , INSERM U1112 , Strasbourg , France
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Plaisancié J, Bailleul-Forestier I, Gaston V, Vaysse F, Lacombe D, Holder-Espinasse M, Abramowicz M, Coubes C, Plessis G, Faivre L, Demeer B, Vincent-Delorme C, Dollfus H, Sigaudy S, Guillén-Navarro E, Verloes A, Jonveaux P, Martin-Coignard D, Colin E, Bieth E, Calvas P, Chassaing N. Mutations in WNT10A are frequently involved in oligodontia associated with minor signs of ectodermal dysplasia. Am J Med Genet A 2013; 161A:671-8. [PMID: 23401279 DOI: 10.1002/ajmg.a.35747] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Accepted: 10/11/2012] [Indexed: 11/09/2022]
Abstract
Ectodermal dysplasias (ED) are a clinically and genetically heterogeneous group of hereditary disorders that have in common abnormal development of ectodermal derivatives. Hypohidrotic ectodermal dysplasia (HED) is characterized by abnormal development of eccrine sweat glands, hair, and teeth. The X-linked form of the disease, caused by mutations in the EDA gene, represents the majority of patients with the hypohidrotic form. Autosomal dominant and autosomal recessive forms are occasionally seen, and result from mutations in at least three genes (WNT10A, EDAR, or more rarely EDARADD). We have screened for mutations in EDAR (commonly involved in the hypohidrotic form) and WNT10A (involved in a wide spectrum of ED and in isolated hypodontia) in a cohort of 36 patients referred for EDA molecular screening, which failed to identify any mutation. We identified eight EDAR mutations in five patients (two with homozygous mutations, one with compound heterozygous mutations, and two with heterozygous mutation), four of which were novel variants. We identified 28 WNT10A mutations in 16 patients (5 with homozygous mutations, 7 with compound heterozygous mutations, and 4 with heterozygous mutations), seven of which were novel variants. Our study allows a more precise definition of the phenotypic spectrum associated with EDAR and WNT10A mutations and underlines the importance of the implication of WNT10A among patients with ED.
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Affiliation(s)
- Julie Plaisancié
- Service de Génétique Médicale, Hôpital Purpan, CHU, Toulouse, France
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