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Jaillard A, Valence S, Vande Perre S, Dhombres F, Héron D, Billette de Villemeur T, Keren B, Afenjar A, Qebibo L, Harion M, Quenum-Miraillet G, Rodriguez D, Jouannic JM, Burglen L, Garel C. Prenatal diagnosis of pontocerebellar hypoplasia with postnatal follow-up. Prenat Diagn 2024; 44:35-48. [PMID: 38165124 DOI: 10.1002/pd.6495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 11/25/2023] [Accepted: 12/04/2023] [Indexed: 01/03/2024]
Abstract
OBJECTIVE To describe the MR features enabling prenatal diagnosis of pontocerebellar hypoplasia (PCH). METHOD This was a retrospective single monocentre study. The inclusion criteria were decreased cerebellar biometry on dedicated neurosonography and available fetal Magnetic Resonance Imaging (MRI) with PCH diagnosis later confirmed either genetically or clinically on post-natal MRI or by autopsy. The exclusion criteria were non-available MRI and sonographic features suggestive of a known genetic or other pathologic diagnosis. The collected data were biometric or morphological imaging parameters, clinical outcome, termination of pregnancy (TOP), pathological findings and genetic analysis (karyotyping, chromosomal microarray, DNA sequencing targeted or exome). PCH was classified as classic, non-classic, chromosomal, or unknown type. RESULTS Forty-two fetuses were diagnosed with PCH, of which 27 were referred for decreased transverse cerebellar diameter at screening ultrasound. Neurosonography and fetal MRI were performed at a mean gestational age of 29 + 4 and 31 + 0 weeks, respectively. Termination of pregnancy occurred. Pregnancy was terminated in 24 cases. Neuropathological examination confirmed the diagnosis in 24 cases and genetic testing identified abnormalities in 29 cases (28 families, 14 chromosomal anomaly). Classic PCH is associated with pontine atrophy and small MR measurements decreasing with advancing gestation. CONCLUSION This is the first large series of prenatally diagnosed PCHs. Our study shows the essential contribution of fetal MRI to the prenatal diagnosis of PCH. Classic PCHs are particularly severe and are associated with certain MR features.
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Affiliation(s)
- Alienor Jaillard
- Department of Radiology, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | - Stéphanie Valence
- Department of Pediatric Neurology, Reference Center for Rare Diseases and Intellectual Deficiencies of Rare Causes, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | - Saskia Vande Perre
- Department of Radiology, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | - Ferdinand Dhombres
- Fetal Medicine Department, Armand-Trousseau Hospital, APHP, Sorbonne University, GRC-26, Paris, France
| | - Delphine Héron
- Department of Genetics, Division of Medical Genetics, Reference Center for Rare Diseases and Intellectual Deficiencies of Rare Causes, La Pitié-Salpêtrière Hospital, APHP, Sorbonne University, Paris, France
| | - Thierry Billette de Villemeur
- Department of Pediatric Neurology, Reference Center for Rare Diseases and Intellectual Deficiencies of Rare Causes, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | - Boris Keren
- Department of Genetics, APHP, Sorbonne University, La Pitié-Salpêtrière Hospital, Paris, France
| | - Alexandra Afenjar
- Clinical Genetics Unit, Reference Center for Cerebellar Malformations and Congenital Diseases, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | - Leila Qebibo
- Department of Genetics, Pediatric Neurogenetics Laboratory, Reference Center for Cerebellar Malformations and Congenital Diseases, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | - Madeleine Harion
- Department of Pediatric Neurology, Reference Center for Rare Diseases and Intellectual Deficiencies of Rare Causes, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | | | - Diana Rodriguez
- Department of Pediatric Neurology, Reference Center for Rare Diseases and Intellectual Deficiencies of Rare Causes, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | - Jean-Marie Jouannic
- Fetal Medicine Department, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
| | - Lydie Burglen
- Department of Genetics, Pediatric Neurogenetics Laboratory, Reference Center for Cerebellar Malformations and Congenital Diseases, Armand-Trousseau Hospital, APHP, Sorbonne University, Paris, France
- Developmental Brain Disorders Laboratory, Imagine Institute, Paris, France
| | - Catherine Garel
- Department of Radiology, Reference Center for Cerebellar Malformations and Congenital Diseases, Armand-Trousseau Hospital, APHP, Sorbonne University, INSERM UMR 1163, Paris, France
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2
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Bloch-Zupan A, Rey T, Jimenez-Armijo A, Kawczynski M, Kharouf N, Dure-Molla MDL, Noirrit E, Hernandez M, Joseph-Beaudin C, Lopez S, Tardieu C, Thivichon-Prince B, Dostalova T, Macek M, Alloussi ME, Qebibo L, Morkmued S, Pungchanchaikul P, Orellana BU, Manière MC, Gérard B, Bugueno IM, Laugel-Haushalter V. Amelogenesis imperfecta: Next-generation sequencing sheds light on Witkop's classification. Front Physiol 2023; 14:1130175. [PMID: 37228816 PMCID: PMC10205041 DOI: 10.3389/fphys.2023.1130175] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 03/06/2023] [Indexed: 05/27/2023] Open
Abstract
Amelogenesis imperfecta (AI) is a heterogeneous group of genetic rare diseases disrupting enamel development (Smith et al., Front Physiol, 2017a, 8, 333). The clinical enamel phenotypes can be described as hypoplastic, hypomineralized or hypomature and serve as a basis, together with the mode of inheritance, to Witkop's classification (Witkop, J Oral Pathol, 1988, 17, 547-553). AI can be described in isolation or associated with others symptoms in syndromes. Its occurrence was estimated to range from 1/700 to 1/14,000. More than 70 genes have currently been identified as causative. Objectives: We analyzed using next-generation sequencing (NGS) a heterogeneous cohort of AI patients in order to determine the molecular etiology of AI and to improve diagnosis and disease management. Methods: Individuals presenting with so called "isolated" or syndromic AI were enrolled and examined at the Reference Centre for Rare Oral and Dental Diseases (O-Rares) using D4/phenodent protocol (www.phenodent.org). Families gave written informed consents for both phenotyping and molecular analysis and diagnosis using a dedicated NGS panel named GenoDENT. This panel explores currently simultaneously 567 genes. The study is registered under NCT01746121 and NCT02397824 (https://clinicaltrials.gov/). Results: GenoDENT obtained a 60% diagnostic rate. We reported genetics results for 221 persons divided between 115 AI index cases and their 106 associated relatives from a total of 111 families. From this index cohort, 73% were diagnosed with non-syndromic amelogenesis imperfecta and 27% with syndromic amelogenesis imperfecta. Each individual was classified according to the AI phenotype. Type I hypoplastic AI represented 61 individuals (53%), Type II hypomature AI affected 31 individuals (27%), Type III hypomineralized AI was diagnosed in 18 individuals (16%) and Type IV hypoplastic-hypomature AI with taurodontism concerned 5 individuals (4%). We validated the genetic diagnosis, with class 4 (likely pathogenic) or class 5 (pathogenic) variants, for 81% of the cohort, and identified candidate variants (variant of uncertain significance or VUS) for 19% of index cases. Among the 151 sequenced variants, 47 are newly reported and classified as class 4 or 5. The most frequently discovered genotypes were associated with MMP20 and FAM83H for isolated AI. FAM20A and LTBP3 genes were the most frequent genes identified for syndromic AI. Patients negative to the panel were resolved with exome sequencing elucidating for example the gene involved ie ACP4 or digenic inheritance. Conclusion: NGS GenoDENT panel is a validated and cost-efficient technique offering new perspectives to understand underlying molecular mechanisms of AI. Discovering variants in genes involved in syndromic AI (CNNM4, WDR72, FAM20A … ) transformed patient overall care. Unravelling the genetic basis of AI sheds light on Witkop's AI classification.
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Affiliation(s)
- Agnes Bloch-Zupan
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Université de Strasbourg, Institut d’études avancées (USIAS), Strasbourg, France
- Hôpitaux Universitaires de Strasbourg (HUS), Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de référence des maladies rares orales et dentaires, O-Rares, Filiére Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
- Eastman Dental Institute, University College London, London, United Kingdom
| | - Tristan Rey
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
- Hôpitaux Universitaires de Strasbourg, Laboratoires de diagnostic génétique, Institut de Génétique Médicale d’Alsace, Strasbourg, France
| | - Alexandra Jimenez-Armijo
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
| | - Marzena Kawczynski
- Hôpitaux Universitaires de Strasbourg (HUS), Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de référence des maladies rares orales et dentaires, O-Rares, Filiére Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
| | - Naji Kharouf
- Université de Strasbourg, Laboratoire de Biomatériaux et Bioingénierie, Inserm UMR_S 1121, Strasbourg, France
| | | | - Muriel de La Dure-Molla
- Rothschild Hospital, Public Assistance-Paris Hospitals (AP-HP), Reference Center for Rare Oral and Den-tal Diseases (O-Rares), Paris, France
| | - Emmanuelle Noirrit
- Centre Hospitalier Universitaire (CHU) Rangueil, Toulouse, Competence Center for Rare Oral and Den-tal Diseases, Toulouse, France
| | - Magali Hernandez
- Centre Hospitalier Régional Universitaire de Nancy, Université de Lorraine, Competence Center for Rare Oral and Dental Diseases, Nancy, France
| | - Clara Joseph-Beaudin
- Centre Hospitalier Universitaire de Nice, Competence Center for Rare Oral and Dental Diseases, Nice, France
| | - Serena Lopez
- Centre Hospitalier Universitaire de Nantes, Competence Center for Rare Oral and Dental Diseases, Nantes, France
| | - Corinne Tardieu
- APHM, Hôpitaux Universitaires de Marseille, Hôpital Timone, Competence Center for Rare Oral and Dental Diseases, Marseille, France
| | - Béatrice Thivichon-Prince
- Centre Hospitalier Universitaire de Lyon, Competence Center for Rare Oral and Dental Diseases, Lyon, France
| | | | - Tatjana Dostalova
- Department of Stomatology (TD) and Department of Biology and Medical Genetics (MM) Charles University 2nd Faculty of Medicine and Motol University Hospital, Prague, Czechia
| | - Milan Macek
- Department of Stomatology (TD) and Department of Biology and Medical Genetics (MM) Charles University 2nd Faculty of Medicine and Motol University Hospital, Prague, Czechia
| | | | - Mustapha El Alloussi
- Faculty of Dentistry, International University of Rabat, CReSS Centre de recherche en Sciences de la Santé, Rabat, Morocco
| | - Leila Qebibo
- Unité de génétique médicale et d’oncogénétique, CHU Hassan II, Fes, Morocco
| | | | | | - Blanca Urzúa Orellana
- Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología, Universidad de Chile, Santiago, Chile
| | - Marie-Cécile Manière
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Hôpitaux Universitaires de Strasbourg (HUS), Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de référence des maladies rares orales et dentaires, O-Rares, Filiére Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
| | - Bénédicte Gérard
- Hôpitaux Universitaires de Strasbourg, Laboratoires de diagnostic génétique, Institut de Génétique Médicale d’Alsace, Strasbourg, France
| | - Isaac Maximiliano Bugueno
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Hôpitaux Universitaires de Strasbourg (HUS), Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de référence des maladies rares orales et dentaires, O-Rares, Filiére Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
| | - Virginie Laugel-Haushalter
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
- Hôpitaux Universitaires de Strasbourg, Laboratoires de diagnostic génétique, Institut de Génétique Médicale d’Alsace, Strasbourg, France
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Khatri D, Putoux A, Cologne A, Kaltenbach S, Besson A, Bertiaux E, Guguin J, Fendler A, Dupont MA, Benoit-Pilven C, Qebibo L, Ahmed-Elie S, Audebert-Bellanger S, Blanc P, Rambaud T, Castelle M, Cornen G, Grotto S, Guët A, Guibaud L, Michot C, Odent S, Ruaud L, Sacaze E, Hamel V, Bordonné R, Leutenegger AL, Edery P, Burglen L, Attié-Bitach T, Mazoyer S, Delous M. Deficiency of the minor spliceosome component U4atac snRNA secondarily results in ciliary defects in human and zebrafish. Proc Natl Acad Sci U S A 2023; 120:e2102569120. [PMID: 36802443 PMCID: PMC9992838 DOI: 10.1073/pnas.2102569120] [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: 02/12/2021] [Accepted: 12/12/2022] [Indexed: 02/23/2023] Open
Abstract
In the human genome, about 750 genes contain one intron excised by the minor spliceosome. This spliceosome comprises its own set of snRNAs, among which U4atac. Its noncoding gene, RNU4ATAC, has been found mutated in Taybi-Linder (TALS/microcephalic osteodysplastic primordial dwarfism type 1), Roifman (RFMN), and Lowry-Wood (LWS) syndromes. These rare developmental disorders, whose physiopathological mechanisms remain unsolved, associate ante- and post-natal growth retardation, microcephaly, skeletal dysplasia, intellectual disability, retinal dystrophy, and immunodeficiency. Here, we report bi-allelic RNU4ATAC mutations in five patients presenting with traits suggestive of the Joubert syndrome (JBTS), a well-characterized ciliopathy. These patients also present with traits typical of TALS/RFMN/LWS, thus widening the clinical spectrum of RNU4ATAC-associated disorders and indicating ciliary dysfunction as a mechanism downstream of minor splicing defects. Intriguingly, all five patients carry the n.16G>A mutation, in the Stem II domain, either at the homozygous or compound heterozygous state. A gene ontology term enrichment analysis on minor intron-containing genes reveals that the cilium assembly process is over-represented, with no less than 86 cilium-related genes containing at least one minor intron, among which there are 23 ciliopathy-related genes. The link between RNU4ATAC mutations and ciliopathy traits is supported by alterations of primary cilium function in TALS and JBTS-like patient fibroblasts, as well as by u4atac zebrafish model, which exhibits ciliopathy-related phenotypes and ciliary defects. These phenotypes could be rescued by WT but not by pathogenic variants-carrying human U4atac. Altogether, our data indicate that alteration of cilium biogenesis is part of the physiopathological mechanisms of TALS/RFMN/LWS, secondarily to defects of minor intron splicing.
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Affiliation(s)
- Deepak Khatri
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
| | - Audrey Putoux
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
- Department of Genetics, Clinical Genetics Unit, Centre de Référence Maladies Rares des Anomalies du Développement, Hospices Civils de Lyon, Université Claude Bernard Lyon 1, 69500Bron, France
| | - Audric Cologne
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
- Institut national de recherche en sciences et technologies du numérique Erable, Laboratoire de Biométrie et Biologie Evolutive, UMR5558 CNRS, Université Claude Bernard Lyon 1, 69622Villeurbanne, France
| | - Sophie Kaltenbach
- Department of Histology Embryology and Cytogenetics, Assistance Publique - Hôpitaux de Paris, Necker-Enfants Malades Hospital, University of Paris, 75015Paris, France
| | - Alicia Besson
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
| | - Eloïse Bertiaux
- Department of Cell Biology, Sciences III, University of Geneva, 1211-Geneva, Switzerland
| | - Justine Guguin
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
| | - Adèle Fendler
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
| | - Marie A. Dupont
- Laboratory of hereditary kidney diseases, Imagine Institute, U1163 INSERM, University of Paris, 75015Paris, France
| | - Clara Benoit-Pilven
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
- Institut national de recherche en sciences et technologies du numérique Erable, Laboratoire de Biométrie et Biologie Evolutive, UMR5558 CNRS, Université Claude Bernard Lyon 1, 69622Villeurbanne, France
| | - Leila Qebibo
- Département de Génétique, Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Assistance Publique - Hôpitaux de Paris, Sorbonne University, Trousseau Hospital, 75012Paris, France
| | - Samira Ahmed-Elie
- Département de Génétique, Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Assistance Publique - Hôpitaux de Paris, Sorbonne University, Trousseau Hospital, 75012Paris, France
| | - Séverine Audebert-Bellanger
- Department of Genetics, Clinical Genetics Unit, Centre de Compétence Anomalies du Développement et Syndromes Polymalformatifs, Centre Hospitalier Universitaire Morvan, 29200Brest, France
| | | | | | - Martin Castelle
- Hematology-Immunology Unit, Assistance Publique - Hôpitaux de Paris, Necker-Enfants Malades Hospital, 75015Paris, France
| | - Gaëlle Cornen
- Pediatric service, Centre Hospitalier Morlaix, 29600Morlaix, France
| | - Sarah Grotto
- Clinical Genetics Unit, Maternité Port-Royal, Assistance Publique - Hôpitaux de Paris, Cochin Broca Hôtel-Dieu Hospitals75014Paris, France
| | - Agnès Guët
- Neonatal and Pediatric Units, Louis-Mourier Hospital, 92700Colombes, France
| | - Laurent Guibaud
- Pediatric and Fetal Imaging, Hospices Civils de Lyon, Université Claude Bernard Lyon 1, 69500Bron, France
| | - Caroline Michot
- Clinical Genetics Department, Centre de Référence Maladies Rares–Maladies Osseuses Constitutionnelles, Assistance Publique - Hôpitaux de Paris, Necker-Enfants Malades Hospital, 75015Paris, France
- Developmental Brain Disorders Laboratory, Imagine Institute, U1163 INSERM, University of Paris, 75015Paris, France
| | - Sylvie Odent
- Service de Génétique Clinique, Centre Hospitalier Universitaire Rennes, Centre de référence Anomalies du développement et syndromes malformatifs, Univ Rennes, CNRS, INSERM, Institut de Génétique et Développement de Rennes UMR 6290/ Equipe de Recherche Labellisée 1305, 35000Rennes, France
| | - Lyse Ruaud
- NeuroDiderot, UMR1141, University of Paris, 75019Paris, France
- Departement of Genetics, Assistance Publique - Hôpitaux de Paris, Robert Debré Hospital, 75019Paris, France
| | - Elise Sacaze
- Pediatric Service, Centre Hospitalier Régional Universitaire Brest, 29200Brest, France
| | - Virginie Hamel
- Department of Cell Biology, Sciences III, University of Geneva, 1211-Geneva, Switzerland
| | - Rémy Bordonné
- Institute of Molecular Genetics of Montpellier, UMR5535 CNRS, University of Montpellier, 34000Montpellier, France
| | | | - Patrick Edery
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
- Department of Genetics, Clinical Genetics Unit, Centre de Référence Maladies Rares des Anomalies du Développement, Hospices Civils de Lyon, Université Claude Bernard Lyon 1, 69500Bron, France
| | - Lydie Burglen
- Département de Génétique, Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Assistance Publique - Hôpitaux de Paris, Sorbonne University, Trousseau Hospital, 75012Paris, France
- Developmental Brain Disorders Laboratory, Imagine Institute, U1163 INSERM, University of Paris, 75015Paris, France
| | - Tania Attié-Bitach
- Department of Histology Embryology and Cytogenetics, Assistance Publique - Hôpitaux de Paris, Necker-Enfants Malades Hospital, University of Paris, 75015Paris, France
- Developmental Brain Disorders Laboratory, Imagine Institute, U1163 INSERM, University of Paris, 75015Paris, France
| | - Sylvie Mazoyer
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
| | - Marion Delous
- Université Claude Bernard Lyon 1, INSERM, CNRS, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292,Genetics of Neurodevelopment Team, 69500Bron, France
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4
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Faqeih EA, Alghamdi MA, Almahroos MA, Alharby E, Almuntashri M, Alshangiti AM, Clément P, Calame DG, Qebibo L, Burglen L, Doco-Fenzy M, Mastrangelo M, Torella A, Manti F, Nigro V, Alban Z, Alharbi GS, Hashmi JA, Alraddadi R, Alamri R, Mitani T, Magalie B, Coban-Akdemir Z, Geckinli BB, Pehlivan D, Romito A, Karageorgou V, Martini J, Colin E, Bonneau D, Bertoli-Avella A, Lupski JR, Pastore A, Peake RWA, Dallol A, Alfadhel M, Almontashiri NAM. Biallelic variants in HECT E3 paralogs, HECTD4 and UBE3C, encoding ubiquitin ligases cause neurodevelopmental disorders that overlap with Angelman syndrome. Genet Med 2023; 25:100323. [PMID: 36401616 DOI: 10.1016/j.gim.2022.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 04/26/2022] [Revised: 10/10/2022] [Accepted: 10/12/2022] [Indexed: 11/21/2022] Open
Abstract
PURPOSE Pathogenic variants in genes encoding ubiquitin E3 ligases are known to cause neurodevelopmental syndromes. Additional neurodevelopmental disorders associated with the other genes encoding E3 ligases are yet to be identified. METHODS Chromosomal analysis and exome sequencing were used to identify the genetic causes in 10 patients from 7 unrelated families with syndromic neurodevelopmental, seizure, and movement disorders and neurobehavioral phenotypes. RESULTS In total, 4 patients were found to have 3 different homozygous loss-of-function (LoF) variants, and 3 patients had 4 compound heterozygous missense variants in the candidate E3 ligase gene, HECTD4, that were rare, absent from controls as homozygous, and predicted to be deleterious in silico. In 3 patients from 2 families with Angelman-like syndrome, paralog-directed candidate gene approach detected 2 LoF variants in the other candidate E3 ligase gene, UBE3C, a paralog of the Angelman syndrome E3 ligase gene, UBE3A. The RNA studies in 4 patients with LoF variants in HECTD4 and UBE3C provided evidence for the LoF effect. CONCLUSION HECTD4 and UBE3C are novel biallelic rare disease genes, expand the association of the other HECT E3 ligase group with neurodevelopmental syndromes, and could explain some of the missing heritability in patients with a suggestive clinical diagnosis of Angelman syndrome.
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Affiliation(s)
- Eissa A Faqeih
- Section of Medical Genetics, Children's Specialist Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Malak Ali Alghamdi
- Medical Genetics Division, College of Medicine, King Saud University, Riyadh, Saudi Arabia; Medical Genetic Division, Department of Pediatrics, King Saud University Medical City, Riyadh, Saudi Arabia
| | - Marwa A Almahroos
- Section of Medical Genetics, Children's Specialist Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Essa Alharby
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia
| | - Makki Almuntashri
- Department of Radiology, King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia; King Abdullah International Medical Research Center (KAIMRC), King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Amnah M Alshangiti
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia
| | - Prouteau Clément
- Department of Medical Genetics and Mitovasc INSERM 1083, CNRS 6015, Angers University Hospital, Angers, France
| | - Daniel G Calame
- Division of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX; Texas Children's Hospital, Houston, TX; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - Leila Qebibo
- Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Département de Génétique, AP-HP, Sorbonne Université, Hôpital Trousseau, 75012, Paris, France
| | - Lydie Burglen
- Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Département de Génétique, AP-HP, Sorbonne Université, Hôpital Trousseau, 75012, Paris, France; Developmental Brain Disorders Laboratory, Imagine Institute, INSERM UMR, 1163, F-75015, Paris, France
| | - Martine Doco-Fenzy
- CHU Reims, SFR CAP Sante, EA3801, Reims, France and CHU de Nantes, service de génétique médicale, Nantes, France
| | - Mario Mastrangelo
- Child Neurology and Psychiatry Unit, Department of Human Neuroscience, Sapienza-University of Rome, Rome, Italy
| | - Annalaura Torella
- Department of Precision Medicine, Università della Campania "Luigi Vanvitelli" ,Naples, Italy; Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Filippo Manti
- Child Neurology and Psychiatry Unit, Department of Human Neuroscience, Sapienza-University of Rome, Rome, Italy
| | - Vincenzo Nigro
- Department of Precision Medicine, Università della Campania "Luigi Vanvitelli" ,Naples, Italy; Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Ziegler Alban
- Department of Medical Genetics and Mitovasc INSERM 1083, CNRS 6015, Angers University Hospital, Angers, France
| | - Ghadeer Saleh Alharbi
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia
| | - Jamil Amjad Hashmi
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia
| | - Rawya Alraddadi
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia
| | - Razan Alamri
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia
| | - Tadahiro Mitani
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - Barth Magalie
- Department of Medical Genetics and Mitovasc INSERM 1083, CNRS 6015, Angers University Hospital, Angers, France
| | - Zeynep Coban-Akdemir
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Human Genetics Center, Department of Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX
| | - Bilgen Bilge Geckinli
- Center of Genetics Diagnosis, Zeynep Kamil Maternity and Children's Training and Research Hospital, Istanbul, Turkey; Department of Medical Genetics, School of Medicine, Marmara University, Istanbul, Turkey
| | - Davut Pehlivan
- Division of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX; Texas Children's Hospital, Houston, TX; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - Antonio Romito
- Medical Reporting & Genomic Research, CENTOGENE GmbH, Rostock, Germany
| | | | - Javier Martini
- Medical Reporting & Genomic Research, CENTOGENE GmbH, Rostock, Germany
| | - Estelle Colin
- Department of Medical Genetics and Mitovasc INSERM 1083, CNRS 6015, Angers University Hospital, Angers, France
| | - Dominique Bonneau
- Department of Medical Genetics and Mitovasc INSERM 1083, CNRS 6015, Angers University Hospital, Angers, France
| | | | - James R Lupski
- Texas Children's Hospital, Houston, TX; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX; Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Annalisa Pastore
- Dementia Research Institute at King's College London, The Wohl Institute, 5 Cutcome Rd, London SE59RT, UK
| | - Roy W A Peake
- Department of Laboratory Medicine, Boston Children's Hospital, Boston, MA
| | - Ashraf Dallol
- Noor Diagnostics and Discovery, Innovation Cluster, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Majid Alfadhel
- King Abdullah International Medical Research Center (KAIMRC), King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia; Genetics and Precision Medicine Department, King Abdullah Specialized Children Hospital (KASCH), King Abdulaziz Medical City (KAMC), Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Naif A M Almontashiri
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia; College of Applied Medical Sciences, Taibah University, Almadinah Almunwarah, Saudi Arabia.
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5
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Burglen L, Van Hoeymissen E, Qebibo L, Barth M, Belnap N, Boschann F, Depienne C, De Clercq K, Douglas AGL, Fitzgerald MP, Foulds N, Garel C, Helbig I, Held K, Horn D, Janssen A, Kaindl AM, Narayanan V, Prager C, Rupin-Mas M, Afenjar A, Zhao S, Ramaekers VT, Ruggiero SM, Thomas S, Valence S, Van Maldergem L, Rohacs T, Rodriguez D, Dyment D, Voets T, Vriens J. Gain-of-function variants in the ion channel gene TRPM3 underlie a spectrum of neurodevelopmental disorders. eLife 2023; 12:81032. [PMID: 36648066 PMCID: PMC9886277 DOI: 10.7554/elife.81032] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 12/07/2022] [Indexed: 01/18/2023] Open
Abstract
TRPM3 is a temperature- and neurosteroid-sensitive plasma membrane cation channel expressed in a variety of neuronal and non-neuronal cells. Recently, rare de novo variants in TRPM3 were identified in individuals with developmental and epileptic encephalopathy, but the link between TRPM3 activity and neuronal disease remains poorly understood. We previously reported that two disease-associated variants in TRPM3 lead to a gain of channel function . Here, we report a further 10 patients carrying one of seven additional heterozygous TRPM3 missense variants. These patients present with a broad spectrum of neurodevelopmental symptoms, including global developmental delay, intellectual disability, epilepsy, musculo-skeletal anomalies, and altered pain perception. We describe a cerebellar phenotype with ataxia or severe hypotonia, nystagmus, and cerebellar atrophy in more than half of the patients. All disease-associated variants exhibited a robust gain-of-function phenotype, characterized by increased basal activity leading to cellular calcium overload and by enhanced responses to the neurosteroid ligand pregnenolone sulfate when co-expressed with wild-type TRPM3 in mammalian cells. The antiseizure medication primidone, a known TRPM3 antagonist, reduced the increased basal activity of all mutant channels. These findings establish gain-of-function of TRPM3 as the cause of a spectrum of autosomal dominant neurodevelopmental disorders with frequent cerebellar involvement in humans and provide support for the evaluation of TRPM3 antagonists as a potential therapy.
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Affiliation(s)
- Lydie Burglen
- Centre de référence des malformations et maladies congénitales du cervelet, Départementde Génétique, APHP, Sorbonne UniversityParisFrance
- Developmental Brain Disorders Laboratory, Imagine InstituteParisFrance
| | - Evelien Van Hoeymissen
- Laboratory of Ion Channel Research, Department of cellular and molecular medicine, University of LeuvenLeuvenBelgium
- VIB Center for Brain & Disease ResearchLeuvenBelgium
- Laboratory of Endometrium, Endometriosis & Reproductive Medicine, Department Development & Regeneration, University of LeuvenLeuvenBelgium
| | - Leila Qebibo
- Centre de référence des malformations et maladies congénitales du cervelet, Départementde Génétique, APHP, Sorbonne UniversityParisFrance
| | - Magalie Barth
- Department of Genetics, University Hospital of AngersAngersFrance
| | - Newell Belnap
- Translational Genomics Research Institute (TGen), Neurogenomics Division, Center for Rare Childhood DisordersPhoenixUnited States
| | - Felix Boschann
- Charité – Universitäts medizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Medical Genetics and Human GeneticsBerlinGermany
| | - Christel Depienne
- Institute of Human Genetics, University Hospital Essen, University Duisburg-EssenEssenGermany
| | - Katrien De Clercq
- Laboratory of Ion Channel Research, Department of cellular and molecular medicine, University of LeuvenLeuvenBelgium
- VIB Center for Brain & Disease ResearchLeuvenBelgium
- Laboratory of Endometrium, Endometriosis & Reproductive Medicine, Department Development & Regeneration, University of LeuvenLeuvenBelgium
| | - Andrew GL Douglas
- University Hospital Southampton NHS Foundation TrustSouthamptonUnited Kingdom
| | | | - Nicola Foulds
- Wessex Clinical Genetics Service, University Hospital Southampton NHS Foundation TrustSouthamptonUnited Kingdom
| | - Catherine Garel
- Centre de référence des malformations et maladies congénitales du cervelet, Départementde Génétique, APHP, Sorbonne UniversityParisFrance
- Service de Radiologie Pédiatrique, Hôpital Armand-Trousseau, Médecine Sorbonne UniversitéParisFrance
| | - Ingo Helbig
- Children's Hospital of PhiladelphiaPhiladelphiaUnited States
| | - Katharina Held
- Laboratory of Ion Channel Research, Department of cellular and molecular medicine, University of LeuvenLeuvenBelgium
- VIB Center for Brain & Disease ResearchLeuvenBelgium
- Laboratory of Endometrium, Endometriosis & Reproductive Medicine, Department Development & Regeneration, University of LeuvenLeuvenBelgium
| | - Denise Horn
- Charité – Universitäts medizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Medical Genetics and Human GeneticsBerlinGermany
| | - Annelies Janssen
- Laboratory of Ion Channel Research, Department of cellular and molecular medicine, University of LeuvenLeuvenBelgium
- VIB Center for Brain & Disease ResearchLeuvenBelgium
| | - Angela M Kaindl
- Institute of Cell Biology and Neurobiology, Charité - Universitäts medizin BerlinBerlinGermany
- Department of Pediatric Neurology, Charité - Universitäts medizin BerlinBerlinGermany
- Charité – Universitäts medizin Berlin, Center for Chronically Sick ChildrenBerlinGermany
| | - Vinodh Narayanan
- Translational Genomics Research Institute (TGen), Neurogenomics Division, Center for Rare Childhood DisordersPhoenixUnited States
| | - Christina Prager
- Department of Pediatric Neurology, Charité - Universitäts medizin BerlinBerlinGermany
- Charité – Universitäts medizin Berlin, Center for Chronically Sick ChildrenBerlinGermany
| | - Mailys Rupin-Mas
- Department of Neuropediatrics, University Hospital of AngersAngersFrance
| | - Alexandra Afenjar
- Centre de référence des malformations et maladies congénitales du cervelet, Départementde Génétique, APHP, Sorbonne UniversityParisFrance
| | - Siyuan Zhao
- Department of Pharmacology, Physiology and Neuroscience, Rutgers, The State University of New JerseyNewarkUnited States
| | | | | | - Simon Thomas
- Wessex Regional Genetics Laboratory, Salisbury District HospitalSalisburyUnited Kingdom
| | - Stéphanie Valence
- Centre de référence des malformations et maladies congénitales du cervelet, Départementde Génétique, APHP, Sorbonne UniversityParisFrance
- Sorbonne Université, Service de Neuropédiatrie, Hôpital Trousseau AP-HPParisFrance
| | - Lionel Van Maldergem
- Centre de Génétique Humaine, Université de Franche-Comté BesançonBesanconFrance
- Center of Clinical Investigation 1431, National Institute of Health and Medical ResearchBesanconFrance
| | - Tibor Rohacs
- Department of Pharmacology, Physiology and Neuroscience, Rutgers, The State University of New JerseyNewarkUnited States
| | - Diana Rodriguez
- Centre de référence des malformations et maladies congénitales du cervelet, Départementde Génétique, APHP, Sorbonne UniversityParisFrance
- Sorbonne Université, Service de Neuropédiatrie, Hôpital Trousseau AP-HPParisFrance
| | - David Dyment
- Children's Hospital of Eastern Ontario Research Institute, University of OttawaOttawaCanada
| | - Thomas Voets
- Laboratory of Ion Channel Research, Department of cellular and molecular medicine, University of LeuvenLeuvenBelgium
- VIB Center for Brain & Disease ResearchLeuvenBelgium
| | - Joris Vriens
- Laboratory of Endometrium, Endometriosis & Reproductive Medicine, Department Development & Regeneration, University of LeuvenLeuvenBelgium
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6
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Harion M, Qebibo L, Riquet A, Rougeot C, Afenjar A, Garel C, Louha M, Lacaze E, Audic-Gérard F, Barth M, Berquin P, Bonneau D, Bourdain F, Busa T, Colin E, Cuisset JM, Des Portes V, Dorison N, Francannet C, Héron B, Laroche C, Lebrun M, Métreau J, Odent S, Pasquier L, Trujillo YP, Perrin L, Pinson L, Rivier F, Sigaudy S, Thauvin-Robinet C, Louvier UW, Labayle O, Rodriguez D, Valence S, Burglen L. New insights into CC2D2A-related Joubert syndrome. J Med Genet 2022; 60:578-586. [DOI: 10.1136/jmg-2022-108754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 09/30/2022] [Indexed: 03/29/2023]
Abstract
PurposeIn this study, we describe the phenotype and genotype of the largest cohort of patients with Joubert syndrome (JS) carrying pathogenic variants on one of the most frequent causative genes,CC2D2A.MethodsWe selected 53 patients with pathogenic variants onCC2D2A, compiled and analysed their clinical, neuroimaging and genetic information and compared it to previous literature.ResultsDevelopmental delay (motor and language) was nearly constant but patients had normal intellectual efficiency in 74% of cases (20/27 patients) and 68% followed mainstream schooling despite learning difficulties. Epilepsy was found in only 13% of cases. Only three patients had kidney cysts, only three had genuine retinal dystrophy and no subject had liver fibrosis or polydactyly. Brain MRIs showed typical signs of JS with rare additional features. Genotype–phenotype correlation findings demonstrate a homozygous truncating variant p.Arg950* linked to a more severe phenotype.ConclusionThis study contradicts previous literature stating an association betweenCC2D2A-related JS and ventriculomegaly. Our study implies thatCC2D2A-related JS is linked to positive neurodevelopmental outcome and low rate of other organ defects except for homozygous pathogenic variant p.Arg950*. This information will help modulate patient follow-up and provide families with accurate genetic counselling.
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7
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Bainbridge MN, Mazumder A, Ogasawara D, Abou Jamra R, Bernard G, Bertini E, Burglen L, Cope H, Crawford A, Derksen A, Dure L, Gantz E, Koch-Hogrebe M, Hurst ACE, Mahida S, Marshall P, Micalizzi A, Novelli A, Peng H, Rodriguez D, Robbins SL, Rutledge SL, Scalise R, Schließke S, Shashi V, Srivastava S, Thiffault I, Topol S, Qebibo L, Wieczorek D, Cravatt B, Haricharan S, Torkamani A, Friedman J. Endocannabinoid dysfunction in neurological disease: neuro-ocular DAGLA-related syndrome. Brain 2022; 145:3383-3390. [PMID: 35737950 PMCID: PMC9586540 DOI: 10.1093/brain/awac223] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 05/30/2022] [Indexed: 11/12/2022] Open
Abstract
The endocannabinoid system is a highly conserved and ubiquitous signalling pathway with broad-ranging effects. Despite critical pathway functions, gene variants have not previously been conclusively linked to human disease. We identified nine children from eight families with heterozygous, de novo truncating variants in the last exon of DAGLA with a neuro-ocular phenotype characterized by developmental delay, ataxia and complex oculomotor abnormality. All children displayed paroxysms of nystagmus or eye deviation accompanied by compensatory head posture and worsened incoordination most frequently after waking. RNA sequencing showed clear expression of the truncated transcript and no differences were found between mutant and wild-type DAGLA activity. Immunofluorescence staining of patient-derived fibroblasts and HEK cells expressing the mutant protein showed distinct perinuclear aggregation not detected in control samples. This report establishes truncating variants in the last DAGLA exon as the cause of a unique paediatric syndrome. Because enzymatic activity was preserved, the observed mislocalization of the truncated protein may account for the observed phenotype. Potential mechanisms include DAGLA haploinsufficiency at the plasma membrane or dominant negative effect. To our knowledge, this is the first report directly linking an endocannabinoid system component with human genetic disease and sets the stage for potential future therapeutic avenues.
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Affiliation(s)
- Matthew N Bainbridge
- Rady Children's Institute for Genomic Medicine (RCIGM), San Diego, CA 92123, USA
| | - Aloran Mazumder
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Daisuke Ogasawara
- The Scripps Research Translational Institute, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Rami Abou Jamra
- Institute of Human Genetics, University Medical Center Leipzig, Leipzig 04103, Germany
| | - Geneviève Bernard
- Department of Neurology and Neurosurgery, McGill University, Montreal, Canada.,Department of Pediatrics and Human Genetics, McGill University, Montreal, Canada.,Department of Human Genetics, McGill University, Montreal, Canada.,Department Specialized Medicine, Division of Medical Genetics, McGill University Health Center, Montreal, Canada.,Child Health and Human Development Program, Research Institute of the McGill University Health Center, Montreal, Canada
| | - Enrico Bertini
- Unit of Neuromuscular and Neurodegenerative Disorders, Department of Neurosciences 'Bambino Gesu' Children's Research Hospital, IRCCS, Rome, Italy
| | - Lydie Burglen
- Centre de Référence Malformations et Maladies Congénitales du Cervelet, Département de génétique, AP-HP Sorbonne Université, Hôpital Trousseau, Paris, France.,Developmental Brain Disorders Laboratory, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Heidi Cope
- Department of Pediatrics, Division Medical Genetics Durham, Duke University Medical Center, North Carolina, USA
| | | | - Alexa Derksen
- Department of Neurology and Neurosurgery, McGill University, Montreal, Canada.,Child Health and Human Development Program, Research Institute of the McGill University Health Center, Montreal, Canada
| | - Leon Dure
- Division of Pediatric Neurology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | - Emily Gantz
- Division of Pediatric Neurology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | | | - Anna C E Hurst
- Department of Genetics, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Sonal Mahida
- Department of Neurology, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Paige Marshall
- Department of Neurology, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Alessia Micalizzi
- Translational Cytogenomics Research Unit, Bambino Gesù Children's Hospital, IRCCS, Roma, Italy
| | - Antonio Novelli
- Translational Cytogenomics Research Unit, Bambino Gesù Children's Hospital, IRCCS, Roma, Italy
| | - Hongfan Peng
- The Scripps Research Translational Institute, The Scripps Research Institute, La Jolla, CA 92037, USA
| | | | - Diana Rodriguez
- Sorbonne Université, INSERM UMR 1141, AP-HP.SU, Centre de Référence Maladies Rares Malformations et Maladies Congénitales du Cervelet & Service de Neuropédiatrie, Hôpital Trousseau, Paris, France
| | - Shira L Robbins
- Ratner Children's Eye Center at the Shiley Eye Institute; Viterbi Family Department of Ophthalmology, University of California San Diego, La Jolla, CA 92093, USA
| | - S Lane Rutledge
- Division of Pediatric Neurology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35233, USA.,Department of Genetics, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Roberta Scalise
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Pisa, Italy.,Tuscan PhD Program of Neuroscience, University of Florence, Pisa and Siena, Florence, Italy
| | - Sophia Schließke
- Institute of Human Genetics, University Medical Center Leipzig, Leipzig 04103, Germany
| | - Vandana Shashi
- Department of Pediatrics, Division Medical Genetics Durham, Duke University Medical Center, North Carolina, USA
| | | | - Isabella Thiffault
- Genomic Medicine Center, Children's Mercy Hospital, Kansas City, Missouri, USA.,Faculty of Medicine, University of Missouri Kansas City, Kansas City, Missouri, USA.,Department of Pathology, Children's Mercy Hospital, Kansas City, Missouri, USA
| | - Sarah Topol
- The Scripps Research Translational Institute, The Scripps Research Institute, La Jolla, CA 92037, USA
| | | | - Leila Qebibo
- Centre de Référence Malformations et Maladies Congénitales du Cervelet, Département de génétique, AP-HP Sorbonne Université, Hôpital Trousseau, Paris, France
| | - Dagmar Wieczorek
- Institute of Human Genetics, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, 40225, Düsseldorf, Germany
| | - Benjamin Cravatt
- The Scripps Research Translational Institute, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Svasti Haricharan
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Ali Torkamani
- The Scripps Research Translational Institute, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Jennifer Friedman
- Rady Children's Institute for Genomic Medicine (RCIGM), San Diego, CA 92123, USA.,Division of Neurology, Rady Children's Hospital San Diego, CA 92123, USA.,Department of Neurosciences, University of California La Jolla, CA 92037, USA.,Department of Pediatrics, University of California La Jolla, CA 92037, USA
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8
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Doummar D, Treven M, Qebibo L, Devos D, Ghoumid J, Ravelli C, Kranz G, Krenn M, Demailly D, Cif L, Davion JB, Zimprich F, Burglen L, Zech M. Childhood-onset progressive dystonia associated with pathogenic truncating variants in CHD8. Ann Clin Transl Neurol 2021; 8:1986-1990. [PMID: 34415117 PMCID: PMC8528468 DOI: 10.1002/acn3.51444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/06/2021] [Accepted: 08/06/2021] [Indexed: 12/28/2022] Open
Abstract
Originally described as a risk factor for autism, CHD8 loss‐of‐function variants have recently been associated with a wider spectrum of neurodevelopmental abnormalities. We further expand the CHD8‐related phenotype with the description of two unrelated patients who presented with childhood‐onset progressive dystonia. Whole‐exome sequencing conducted in two independent laboratories revealed a CHD8 nonsense variant in one patient and a frameshift variant in the second. The patients had strongly overlapping phenotypes characterized by generalized dystonia with mild‐to‐moderate neurodevelopmental comorbidity. Deep brain stimulation led to clinical improvement in both cases. We suggest that CHD8 should be added to the growing list of neurodevelopmental disorder‐associated genes whose mutations can also result in dystonia‐dominant phenotypes.
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Affiliation(s)
- Diane Doummar
- Pediatric Neurology Department, Movement Disorders Center, Armand Trousseau Hospital, AP-HP.Sorbonne Université, Paris, France
| | - Marco Treven
- Department of Neurology, Medical University of Vienna, Vienna, Austria.,Konrad Lorenz Institute for Evolution and Cognition Research, Klosterneuburg, 3400, Austria
| | - Leila Qebibo
- Cerebellar Malformations and Congenital diseases Reference Center and Neurogenetics Lab, Department of Genetics, Armand Trousseau Hospital, AP-HP.Sorbonne Université, Paris, France
| | - David Devos
- Université de Lille, INSERM, U1172, CHU-Lille, Lille, France.,Neuroscience Cognition Research Centre, Lille, France.,Neurology and Movement Disorders Department, CHU Lille, Licend, Lille, 59000, France
| | - Jamal Ghoumid
- CHU Lille, University of Lille, ULR7364 RADEME, Lille, France
| | - Claudia Ravelli
- Pediatric Neurology Department, Movement Disorders Center, Armand Trousseau Hospital, AP-HP.Sorbonne Université, Paris, France
| | | | - Martin Krenn
- Department of Neurology, Medical University of Vienna, Vienna, Austria.,School of Medicine, Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Diane Demailly
- Département de Neurochirurgie, Unité des Pathologies Cérébrales Résistantes, Unité de Recherche sur les Comportements et Mouvements Anormaux, Hôpital Gui de Chauliac, Centre Hospitalier Régional Montpellier, Montpellier, France.,Faculté de médecine, Université de Montpellier, France
| | - Laura Cif
- Département de Neurochirurgie, Unité des Pathologies Cérébrales Résistantes, Unité de Recherche sur les Comportements et Mouvements Anormaux, Hôpital Gui de Chauliac, Centre Hospitalier Régional Montpellier, Montpellier, France.,Faculté de médecine, Université de Montpellier, France
| | | | - Fritz Zimprich
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Lydie Burglen
- Cerebellar Malformations and Congenital diseases Reference Center and Neurogenetics Lab, Department of Genetics, Armand Trousseau Hospital, AP-HP.Sorbonne Université, Paris, France.,Developmental Brain Disorders Laboratory, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Michael Zech
- School of Medicine, Institute of Human Genetics, Technical University of Munich, Munich, Germany.,Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany
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9
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Lunati A, Petit A, Lapillonne H, Gameiro C, Saillour V, Garel C, Doummar D, Qebibo L, Aissat A, Fanen P, Bartolucci P, Galactéros F, Funalot B, Burglen L, Mansour‐Hendili L. VPS4A mutation in syndromic congenital hemolytic anemia without obvious signs of dyserythropoiesis. Am J Hematol 2021; 96:E121-E123. [PMID: 33460484 DOI: 10.1002/ajh.26099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/12/2021] [Accepted: 01/14/2021] [Indexed: 11/09/2022]
Affiliation(s)
- Ariane Lunati
- Département de Génétique, AP‐HP Hôpitaux Universitaires Henri Mondor Créteil France
- Université Paris Est Créteil, INSERM, IMRB Créteil France
| | - Arnaud Petit
- Sorbonne Université, AP‐HP, Hôpital Trousseau, Service d'hématologie et d'oncologie pédiatrique Paris France
| | - Hélène Lapillonne
- Service d'hématologie biologique, AP‐HP, Hôpital Trousseau Paris France
| | - Christine Gameiro
- Département de Génétique, AP‐HP Hôpitaux Universitaires Henri Mondor Créteil France
| | - Virginie Saillour
- Laboratoire de biologie médicale multisites Seqoia – FMG2025 Paris France
| | | | - Diane Doummar
- Sorbonne Université, Service de Neuropédiatrie, centre de référence neurogénétique, AP‐HP, Hôpital Armand Trousseau, Fédération Universitaire I2D2 Paris France
| | - Leila Qebibo
- Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Département de Génétique AP‐HP, Sorbonne Université, Hôpital Trousseau Paris France
| | - Abdelrazak Aissat
- Département de Génétique, AP‐HP Hôpitaux Universitaires Henri Mondor Créteil France
- Université Paris Est Créteil, INSERM, IMRB Créteil France
| | - Pascale Fanen
- Département de Génétique, AP‐HP Hôpitaux Universitaires Henri Mondor Créteil France
- Université Paris Est Créteil, INSERM, IMRB Créteil France
| | - Pablo Bartolucci
- Sickle Cell Referral Center – UMGGR, AP‐HP, Hôpitaux Universitaires Henri Mondor Créteil France
- Université Paris Est Créteil, IMRB Equipe Pirenne, Laboratoire d'excellence LABEX GRex Créteil France
| | - Fréderic Galactéros
- Sickle Cell Referral Center – UMGGR, AP‐HP, Hôpitaux Universitaires Henri Mondor Créteil France
- Université Paris Est Créteil, IMRB Equipe Pirenne, Laboratoire d'excellence LABEX GRex Créteil France
| | - Benoit Funalot
- Département de Génétique, AP‐HP Hôpitaux Universitaires Henri Mondor Créteil France
- Université Paris Est Créteil, INSERM, IMRB Créteil France
- Laboratoire de biologie médicale multisites Seqoia – FMG2025 Paris France
| | - Lydie Burglen
- Laboratoire de biologie médicale multisites Seqoia – FMG2025 Paris France
- Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Département de Génétique AP‐HP, Sorbonne Université, Hôpital Trousseau Paris France
- Developmental Brain Disorders Laboratory Institut Imagine, INSERM UMR 1163 Paris France
| | - Lamisse Mansour‐Hendili
- Département de Génétique, AP‐HP Hôpitaux Universitaires Henri Mondor Créteil France
- Laboratoire de biologie médicale multisites Seqoia – FMG2025 Paris France
- Université Paris Est Créteil, IMRB Equipe Pirenne, Laboratoire d'excellence LABEX GRex Créteil France
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10
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Meng L, Isohanni P, Shao Y, Graham BH, Hickey SE, Brooks S, Suomalainen A, Joset P, Steindl K, Rauch A, Hackenberg A, High FA, Armstrong-Javors A, Mencacci NE, Gonzàlez-Latapi P, Kamel WA, Al-Hashel JY, Bustos BI, Hernandez AV, Krainc D, Lubbe SJ, Van Esch H, De Luca C, Ballon K, Ravelli C, Burglen L, Qebibo L, Calame DG, Mitani T, Marafi D, Pehlivan D, Saadi NW, Sahin Y, Maroofian R, Efthymiou S, Houlden H, Maqbool S, Rahman F, Gu S, Posey JE, Lupski JR, Hunter JV, Wangler MF, Carroll CJ, Yang Y. MED27 Variants Cause Developmental Delay, Dystonia, and Cerebellar Hypoplasia. Ann Neurol 2021; 89:828-833. [PMID: 33443317 DOI: 10.1002/ana.26019] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 01/10/2021] [Accepted: 01/11/2021] [Indexed: 12/30/2022]
Abstract
The Mediator multiprotein complex functions as a regulator of RNA polymerase II-catalyzed gene transcription. In this study, exome sequencing detected biallelic putative disease-causing variants in MED27, encoding Mediator complex subunit 27, in 16 patients from 11 families with a novel neurodevelopmental syndrome. Patient phenotypes are highly homogeneous, including global developmental delay, intellectual disability, axial hypotonia with distal spasticity, dystonic movements, and cerebellar hypoplasia. Seizures and cataracts were noted in severely affected individuals. Identification of multiple patients with biallelic MED27 variants supports the critical role of MED27 in normal human neural development, particularly for the cerebellum. ANN NEUROL 2021;89:828-833.
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Affiliation(s)
- Linyan Meng
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
- Baylor Genetics, Houston, TX
| | - Pirjo Isohanni
- Research Programs Unit, Stem Cells and Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Department of Child Neurology, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Yunru Shao
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
- Department of Pediatrics, Baylor College of Medicine, Houston, TX
- Texas Children's Hospital, Houston, TX
| | - Brett H Graham
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN
| | - Scott E Hickey
- Department of Pediatrics, Ohio State University College of Medicine, Division of Genetic and Genomic Medicine, Nationwide Children's Hospital, Columbus, OH
| | - Stephanie Brooks
- Department of Pediatrics, Ohio State University College of Medicine, Division of Genetic and Genomic Medicine, Nationwide Children's Hospital, Columbus, OH
| | - Anu Suomalainen
- Research Programs Unit, Stem Cells and Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Pascal Joset
- Institute of Medical Genetics, University of Zürich, Schlieren-Zürich, Switzerland
| | - Katharina Steindl
- Institute of Medical Genetics, University of Zürich, Schlieren-Zürich, Switzerland
| | - Anita Rauch
- Institute of Medical Genetics, University of Zürich, Schlieren-Zürich, Switzerland
| | - Annette Hackenberg
- Department of Pediatric Neurology, University Children's Hospital Zürich, University of Zürich, Zürich, Switzerland
| | - Frances A High
- Division of Medical Genetics, Massachusetts General Hospital, Boston, MA
- Harvard Medical School, Boston, MA
| | - Amy Armstrong-Javors
- Harvard Medical School, Boston, MA
- Department of Pediatric Neurology, Massachusetts General Hospital, Boston, MA
| | - Niccolò E Mencacci
- Ken and Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Simpson Querrey Center for Neurogenetics, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Paulina Gonzàlez-Latapi
- Ken and Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Walaa A Kamel
- Department of Neurology, Ibn Sina Hospital, Kuwait City, Kuwait
- Department of Neurology, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Jasem Y Al-Hashel
- Department of Neurology, Ibn Sina Hospital, Kuwait City, Kuwait
- Department of Medicine, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Bernabé I Bustos
- Ken and Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Simpson Querrey Center for Neurogenetics, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Alejandro V Hernandez
- Ken and Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Dimitri Krainc
- Ken and Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Simpson Querrey Center for Neurogenetics, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Steven J Lubbe
- Ken and Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Simpson Querrey Center for Neurogenetics, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Hilde Van Esch
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Chiara De Luca
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Katleen Ballon
- Centre for Developmental Disabilities, University Hospitals Leuven, Leuven, Belgium
| | - Claudia Ravelli
- Pediatric Neurology Department, Neurogenetics Reference Center, I-motion Institute, Public Hospital Network of Paris, Sorbonne University, Armand Trousseau Hospital, Paris, France
| | - Lydie Burglen
- Cerebellar Malformations and Congenital Diseases Reference Center and Neurogenetics Lab, Department of Genetics, Public Hospital Network of Paris, Sorbonne University, Armand Trousseau Hospital, Paris, France
- Developmental Brain Disorders Laboratory, Imagine Institute, Paris, France
| | - Leila Qebibo
- Cerebellar Malformations and Congenital Diseases Reference Center and Neurogenetics Lab, Department of Genetics, Public Hospital Network of Paris, Sorbonne University, Armand Trousseau Hospital, Paris, France
| | - Daniel G Calame
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
- Texas Children's Hospital, Houston, TX
- Division of Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Tadahiro Mitani
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - Dana Marafi
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
- Department of Pediatrics, Faculty of Medicine, Kuwait University, Safat, Kuwait
| | - Davut Pehlivan
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
- Texas Children's Hospital, Houston, TX
- Division of Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Nebal W Saadi
- College of Medicine, Baghdad University, Baghdad, Iraq
- Children Welfare Teaching Hospital, Baghdad, Iraq
| | - Yavuz Sahin
- Department of Medical Genetics, Genoks Genetic Center, Ankara, Turkey
| | - Reza Maroofian
- Department of Neuromuscular Disorders, University College London Institute of Neurology, London, UK
| | - Stephanie Efthymiou
- Department of Neuromuscular Disorders, University College London Institute of Neurology, London, UK
| | - Henry Houlden
- Department of Neuromuscular Disorders, University College London Institute of Neurology, London, UK
| | - Shazia Maqbool
- Development and Behavioral Pediatrics Department, Institute of Child Health and Children Hospital, Lahore, Pakistan
| | - Fatima Rahman
- Development and Behavioral Pediatrics Department, Institute of Child Health and Children Hospital, Lahore, Pakistan
| | - Shen Gu
- School of Biomedical Sciences, Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Jennifer E Posey
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - James R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
- Department of Pediatrics, Baylor College of Medicine, Houston, TX
- Texas Children's Hospital, Houston, TX
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX
| | - Jill V Hunter
- Edward B. Singleton Department of Pediatric Radiology, Texas Children's Hospital, Houston, TX
- Department of Radiology, Baylor College of Medicine, Houston, TX
| | - Michael F Wangler
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
- Department of Child Neurology, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Jan and Dan Neurological Research Institute, Texas Children's Hospital, Houston, TX
| | - Christopher J Carroll
- Research Programs Unit, Stem Cells and Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Molecular and Clinical Sciences Research Institute, St George's, University of London, London, United Kingdom
| | - Yaping Yang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
- Baylor Genetics, Houston, TX
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11
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Foley AR, Zou Y, Dunford JE, Rooney J, Chandra G, Xiong H, Straub V, Voit T, Romero N, Donkervoort S, Hu Y, Markello T, Horn A, Qebibo L, Dastgir J, Meilleur KG, Finkel RS, Fan Y, Mamchaoui K, Duguez S, Nelson I, Laporte J, Santi M, Malfatti E, Maisonobe T, Touraine P, Hirano M, Hughes I, Bushby K, Oppermann U, Böhm J, Jaiswal JK, Stojkovic T, Bönnemann CG. GGPS1 Mutations Cause Muscular Dystrophy/Hearing Loss/Ovarian Insufficiency Syndrome. Ann Neurol 2020; 88:332-347. [PMID: 32403198 PMCID: PMC7496979 DOI: 10.1002/ana.25772] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/05/2020] [Accepted: 05/06/2020] [Indexed: 01/08/2023]
Abstract
Objective A hitherto undescribed phenotype of early onset muscular dystrophy associated with sensorineural hearing loss and primary ovarian insufficiency was initially identified in 2 siblings and in subsequent patients with a similar constellation of findings. The goal of this study was to understand the genetic and molecular etiology of this condition. Methods We applied whole exome sequencing (WES) superimposed on shared haplotype regions to identify the initial biallelic variants in GGPS1 followed by GGPS1 Sanger sequencing or WES in 5 additional families with the same phenotype. Molecular modeling, biochemical analysis, laser membrane injury assay, and the generation of a Y259C knock‐in mouse were done. Results A total of 11 patients in 6 families carrying 5 different biallelic pathogenic variants in specific domains of GGPS1 were identified. GGPS1 encodes geranylgeranyl diphosphate synthase in the mevalonate/isoprenoid pathway, which catalyzes the synthesis of geranylgeranyl pyrophosphate, the lipid precursor of geranylgeranylated proteins including small guanosine triphosphatases. In addition to proximal weakness, all but one patient presented with congenital sensorineural hearing loss, and all postpubertal females had primary ovarian insufficiency. Muscle histology was dystrophic, with ultrastructural evidence of autophagic material and large mitochondria in the most severe cases. There was delayed membrane healing after laser injury in patient‐derived myogenic cells, and a knock‐in mouse of one of the mutations (Y259C) resulted in prenatal lethality. Interpretation The identification of specific GGPS1 mutations defines the cause of a unique form of muscular dystrophy with hearing loss and ovarian insufficiency and points to a novel pathway for this clinical constellation. ANN NEUROL 2020;88:332–347.
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Affiliation(s)
- A Reghan Foley
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Yaqun Zou
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - James E Dunford
- Botnar Research Centre, National Institute for Health Research Biomedical Research Centre Oxford, University of Oxford, Oxford, United Kingdom
| | - Jachinta Rooney
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Goutam Chandra
- Children's National Health System, Center for Genetic Medicine Research, Washington, District of Columbia, USA
| | - Hui Xiong
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Volker Straub
- Institute of Genetic Medicine, International Centre for Life, Newcastle upon Tyne, United Kingdom
| | - Thomas Voit
- Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Norma Romero
- National Institute of Health and Medical Research U974, Sorbonne University, Institute of Myology, APHP, Paris, France.,Neuromuscular Morphology Unit, Institute of Myology, Pitié-Salpêtrière Hospital, Paris, France
| | - Sandra Donkervoort
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Ying Hu
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Thomas Markello
- National Institutes of Health Undiagnosed Diseases Program, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Adam Horn
- Children's National Health System, Center for Genetic Medicine Research, Washington, District of Columbia, USA
| | - Leila Qebibo
- Unit of Medical Genetics and Oncogenetics, University Hospital, Fes, Morocco
| | - Jahannaz Dastgir
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA.,Department of Pediatric Neurology, Goryeb Children's Hospital, Morristown, New Jersey, USA
| | - Katherine G Meilleur
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA.,Biogen, Cambridge, Massachusetts, USA
| | - Richard S Finkel
- Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Translational Neuroscience Program, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Yanbin Fan
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Kamel Mamchaoui
- National Institute of Health and Medical Research U974, Sorbonne University, Institute of Myology, APHP, Paris, France
| | - Stephanie Duguez
- National Institute of Health and Medical Research U974, Sorbonne University, Institute of Myology, APHP, Paris, France.,School of Biomedical Sciences, Ulster University, Derry, United Kingdom
| | - Isabelle Nelson
- National Institute of Health and Medical Research U974, Sorbonne University, Institute of Myology, APHP, Paris, France
| | - Jocelyn Laporte
- Institute of Genetics and Molecular and Cellular Biology, National Institute of Health and Medical Research U1258, National Center for Scientific Research UMR7104, University of Strasbourg, Illkirch, France
| | - Mariarita Santi
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Edoardo Malfatti
- National Institute of Health and Medical Research U974, Sorbonne University, Institute of Myology, APHP, Paris, France.,U1179 University of Versailles Saint-Quentin-en-Yvelines-National Institute of Health and Medical Research, Paris-Saclay University, Versailles, France.,Neurology Department, Reference Center for Neuromuscular Diseases North/East/Ile de France, Raymond-Poincaré University Hospital, Garches, France
| | - Thierry Maisonobe
- Department of Clinical Neurophysiology, Pitié-Salpêtrière Hospital, Paris, France
| | - Philippe Touraine
- Department of Endocrinology and Reproductive Medicine, Faculty of Medicine, Sorbonne University, Pitié-Salpêtrière Hospital, APHP, Reference Center for Rare Endocrine Diseases of Growth and Development and Reference Center for Rare Gynecologic Disorders, Paris, France
| | - Michio Hirano
- Department of Neurology, H. Houston Merritt Neuromuscular Research Center , Columbia University Medical Center, New York, New York, USA
| | - Imelda Hughes
- Department of Paediatric Neurology, Royal Manchester Children's Hospital, Manchester, United Kingdom
| | - Kate Bushby
- Institute of Genetic Medicine, International Centre for Life, Newcastle upon Tyne, United Kingdom
| | - Udo Oppermann
- Botnar Research Centre, National Institute for Health Research Biomedical Research Centre Oxford, University of Oxford, Oxford, United Kingdom.,Structural Genomics Consortium, University of Oxford, Oxford, United Kingdom.,Freiburg Institute of Advanced Studies, University of Freiburg, Freiburg, Germany
| | - Johann Böhm
- Institute of Genetics and Molecular and Cellular Biology, National Institute of Health and Medical Research U1258, National Center for Scientific Research UMR7104, University of Strasbourg, Illkirch, France
| | - Jyoti K Jaiswal
- Children's National Health System, Center for Genetic Medicine Research, Washington, District of Columbia, USA.,Department of Genomics and Precision Medicine, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, USA
| | - Tanya Stojkovic
- Faculty of Medicine, Sorbonne University, Pitié-Salpêtrière Hospital, APHP, Reference Center for Neuromuscular Diseases North/East/Ile de France, Paris, France
| | - Carsten G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
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