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Mutation Update for Kabuki Syndrome Genes KMT2D and KDM6A and Further Delineation of X‐Linked Kabuki Syndrome Subtype 2
Authors:Nina Bögershausen  Vincent Gatinois  Vera Riehmer  Hülya Kayserili  Jutta Becker  Michaela Thoenes  Pelin Özlem Simsek‐Kiper  Mouna Barat‐Houari  Nursel H. Elcioglu  Dagmar Wieczorek  Sigrid Tinschert  Guillaume Sarrabay  Tim M. Strom  Aurélie Fabre  Gareth Baynam  Elodie Sanchez  Gudrun Nürnberg  Umut Altunoglu  Yline Capri  Bertrand Isidor  Didier Lacombe  Carole Corsini  Valérie Cormier‐Daire  Damien Sanlaville  Fabienne Giuliano  Kim‐Hanh Le Quan Sang  Honorine Kayirangwa  Peter Nürnberg  Thomas Meitinger  Koray Boduroglu  Barbara Zoll  Stanislas Lyonnet  Andreas Tzschach  Alain Verloes  Nataliya Di Donato  Isabelle Touitou  Christian Netzer  Yun Li  David Geneviève  Gökhan Yigit  Bernd Wollnik
Affiliation:1. Institute of Human Genetics, University Medical Center Goettingen, Goettingen, Germany;2. Laboratory of Rare and Autoinflammatory Diseases, CHU Montpellier, Montpellier, France;3. University of Montpellier, Montpellier, France;4. INSERM UMR1183, Montpellier, France;5. Institute of Human Genetics, University of Cologne, Cologne, Germany;6. Medical Genetics Department, Ko? University School of Medicine (KUSOM), Istanbul, Turkey;7. Pediatric Genetics Unit, Department of Pediatrics, Hacettepe University Medical Faculty, Ankara, Turkey;8. Department of Pediatric Genetics, Marmara University Medical Faculty, Istanbul, Turkey;9. Institute of Human Genetics, University of Duesseldorf, Duesseldorf, Germany;10. Institute for Clinical Genetics, Faculty of Medicine Carl Gustav Carus, Technische Universit?t Dresden, Germany;11. Zentrum für Humangenetik, Medizinische Universit?t, Innsbruck, Austria;12. Institute of Human Genetics, Technische Universit?t München, Munich, Germany;13. Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany;14. Genetic Services of Western Australia, Princess Margaret and King Edward Memorial Hospitals, Perth, Australia;15. Western Australian Register of Developmental Anomalies, Perth, Australia;16. Telethon Kids Institute, Perth, Australia;17. School of Paediatrics and Child Health, University of Western Australia, Perth, Australia;18. Cologne Center for Genomics, University of Cologne, Cologne, Germany;19. Department of Medical Genetics, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey;20. Department of Genetics, APHP‐Robert DEBRE University Hospital, Paris VII University, Denis Diderot Medical School, Paris, France;21. Department of Genetics, Nantes University Hospital, Nantes, France;22. Department of Medical Genetics, Bordeaux University, CHU Bordeaux, Bordeaux, France;23. Department of Medical Genetics, Reference Center for Developmental Abnormalities, CHU, Montpellier, France;24. Institut Imagine, Paris Descartes‐Sorbonne Paris Cité University, Paris, France;25. Service de Génétique, H?pital Universitaire Necker‐Enfants Malades, Assistance Publique ‐ H?pitaux de Paris, Paris, France;26. HCL Genetic Department, INSERM U1028 CNRS UMR 5292, Lyon, France;27. Department of Medical Genetics, l'Archet II Hospital, Nice, France
Abstract:Kabuki syndrome (KS) is a rare but recognizable condition that consists of a characteristic face, short stature, various organ malformations, and a variable degree of intellectual disability. Mutations in KMT2D have been identified as the main cause for KS, whereas mutations in KDM6A are a much less frequent cause. Here, we report a mutation screening in a case series of 347 unpublished patients, in which we identified 12 novel KDM6A mutations (KS type 2) and 208 mutations in KMT2D (KS type 1), 132 of them novel. Two of the KDM6A mutations were maternally inherited and nine were shown to be de novo. We give an up‐to‐date overview of all published mutations for the two KS genes and point out possible mutation hot spots and strategies for molecular genetic testing. We also report the clinical details for 11 patients with KS type 2, summarize the published clinical information, specifically with a focus on the less well‐defined X‐linked KS type 2, and comment on phenotype–genotype correlations as well as sex‐specific phenotypic differences. Finally, we also discuss a possible role of KDM6A in Kabuki‐like Turner syndrome and report a mutation screening of KDM6C (UTY) in male KS patients.
Keywords:Kabuki syndrome  KDM6A  MLL2  KMT2D  UTY  KDM6C
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