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Crow YJ, Marshall H, Rice GI, Seabra L, Jenkinson EM, Baranano K, Battini R, Berger A, Blair E, Blauwblomme T, Bolduc F, Boddaert N, Buckard J, Burnett H, Calvert S, Caumes R, Ng ACH, Chiang D, Clifford DB, Cordelli DM, de Burca A, Demic N, Desguerre I, De Waele L, Di Fonzo A, Dunham SR, Dyack S, Elmslie F, Ferrand M, Fisher G, Karimiani EG, Ghoumid J, Gibbon F, Goel H, Hilmarsen HT, Hughes I, Jacob A, Jones EA, Kumar R, Leventer RJ, MacDonald S, Maroofian R, Mehta SG, Metz I, Monfrini E, Neumann D, Noetzel M, O'Driscoll M, Õunap K, Panzer A, Parikh S, Prabhakar P, Ramond F, Sandford R, Saneto R, Soh C, Stutterd CA, Subramanian GM, Talbot K, Thomas RH, Toro C, Touraine R, Wakeling E, Wassmer E, Whitney A, Livingston JH, O'Keefe RT, Badrock AP. Leukoencephalopathy with calcifications and cysts: Genetic and phenotypic spectrum. Am J Med Genet A 2021; 185:15-25. [PMID: 33029936 DOI: 10.1002/ajmg.a.61907] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/03/2020] [Accepted: 09/16/2020] [Indexed: 12/19/2022]
Abstract
Biallelic mutations in SNORD118, encoding the small nucleolar RNA U8, cause leukoencephalopathy with calcifications and cysts (LCC). Given the difficulty in interpreting the functional consequences of variants in nonprotein encoding genes, and the high allelic polymorphism across SNORD118 in controls, we set out to provide a description of the molecular pathology and clinical spectrum observed in a cohort of patients with LCC. We identified 64 affected individuals from 56 families. Age at presentation varied from 3 weeks to 67 years, with disease onset after age 40 years in eight patients. Ten patients had died. We recorded 44 distinct, likely pathogenic, variants in SNORD118. Fifty two of 56 probands were compound heterozygotes, with parental consanguinity reported in only three families. Forty nine of 56 probands were either heterozygous (46) or homozygous (three) for a mutation involving one of seven nucleotides that facilitate a novel intramolecular interaction between the 5' end and 3' extension of precursor-U8. There was no obvious genotype-phenotype correlation to explain the marked variability in age at onset. Complementing recently published functional analyses in a zebrafish model, these data suggest that LCC most often occurs due to combinatorial severe and milder mutations, with the latter mostly affecting 3' end processing of precursor-U8.
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Affiliation(s)
- Yanick J Crow
- Centre for Genomic and Experimental Medicine, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
- Laboratory of Neurogenetics and Neuroinflammation, Institut Imagine, Université de Paris, Paris, France
| | - Heather Marshall
- Centre for Genomic and Experimental Medicine, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Gillian I Rice
- Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Luis Seabra
- Laboratory of Neurogenetics and Neuroinflammation, Institut Imagine, Université de Paris, Paris, France
| | - Emma M Jenkinson
- Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Kristin Baranano
- Department of Neurology and Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Roberta Battini
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
- Department of Developmental Neuroscience, IRCCS Fondazione Stella Maris, Pisa, Italy
| | - Andrea Berger
- Department of Neuropediatrics, Kliniken Nordoberpfalz AG, Germany
| | - Edward Blair
- Oxford Centre for Genomic Medicine, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Thomas Blauwblomme
- Paediatric Neurosurgery Department, Necker-Enfants Malades Hospital, APHP, Université de Paris, Paris, France
| | - Francois Bolduc
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Natalie Boddaert
- Paediatric Radiology Department, Hôpital Necker Enfants Malades, AP-HP, University de Paris, INSERM U1163, Institut Imagine, Paris, France
| | - Johannes Buckard
- Department of Neuropediatrics, Sozialpädiatrisches Zentrum am EVK Düsseldorf, Düsseldorf, Germany
| | | | - Sophie Calvert
- Neurosciences Department, Queensland Children's Hospital, Brisbane, Queensland, Australia
| | - Roseline Caumes
- Clinique de Génétique Guy Fontaine, CHU Lille, Lille, France
| | - Andy Cheuk-Him Ng
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Diana Chiang
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - David B Clifford
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Duccio M Cordelli
- Child Neurology and Psychiatry Unit, Department of Medical and Surgical Sciences (DIMEC), S. Orsola Hospital, University of Bologna, Italy
| | - Anna de Burca
- Oxford Centre for Genomic Medicine, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Natasha Demic
- Department of Neurology, Vestfold Hospital, Tønsberg, Norway
| | - Isabelle Desguerre
- Department of Paediatric Neurology, Université de Paris, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Liesbeth De Waele
- Department of Paediatric Neurology, University Hospitals Leuven, Leuven, Belgium
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Alessio Di Fonzo
- Foundation IRCCS Ca 'Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy
- Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - S Richard Dunham
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sarah Dyack
- Division of Medical Genetics, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Frances Elmslie
- South West Thames Regional Genetics Service, St George's, University of London, London, UK
| | | | - Gemma Fisher
- Department of Paediatric Neurology, University Hospital of Wales, Cardiff, UK
| | - Ehsan Ghayoor Karimiani
- Molecular and Clinical Sciences Institute, St. George's University of London, London, UK
- Innovative Medical Research Center, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Jamal Ghoumid
- Clinique de Génétique Guy Fontaine, CHU Lille, Lille, France
| | - Frances Gibbon
- Department of Paediatric Neurology, University Hospital of Wales, Cardiff, UK
| | - Himanshu Goel
- Hunter Genetics, Hunter New England Local Health District, Waratah, Australia
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
| | - Hilde T Hilmarsen
- Department of Medical Genetics, Telemark Hospital Trust, Skien, Norway
| | - Imelda Hughes
- Department of Paediatric Neurology, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - Anu Jacob
- Department of Neurology, The Walton Centre NHS Trust, Liverpool, UK
- Department of Neurology, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Elizabeth A Jones
- Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
- Clinical Genetic Service, Manchester Centre for Genomic Medicine, Saint Mary's Hospital, Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - Ram Kumar
- Department of Paediatric Neurology, Alder Hey Children's NHS Foundation Trust, Liverpool, UK
| | - Richard J Leventer
- Department of Neurology Royal Children's Hospital, Murdoch Children's Research Institute, Melbourne, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Shelley MacDonald
- Maritime Medical Genetics, IWK Health Centre, Halifax, Nova Scotia, Canada
| | - Reza Maroofian
- Department of Neuromuscular Disorders, University College London Queen Square Institute of Neurology, London, UK
| | - Sarju G Mehta
- East Anglian Regional Genetics Service, Addenbrookes Hospital, Cambridge, UK
| | - Imke Metz
- Department of Neuropathology, University Medical Center, Georg August University, Göttingen, Germany
| | - Edoardo Monfrini
- Foundation IRCCS Ca 'Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy
- Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Daniela Neumann
- Klinikum Wilhelmshaven, Department of Neuropediatrics, Germany
| | - Michael Noetzel
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Washington, USA
| | - Mary O'Driscoll
- West Midlands Regional Clinical Genetics Service, Birmingham Health Partners, Birmingham Women's Hospital NHS Foundation Trust, Birmingham, UK
| | - Katrin Õunap
- Department of Clinical Genetics, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
- Department of Clinical Genetics, United Laboratories, Tartu University Hospital, Tartu, Estonia
| | - Axel Panzer
- Paediatric Neurology, DRK Kliniken Berlin-Westend, Berlin, Germany
| | - Sumit Parikh
- Neurogenetics Program, Center for Pediatric Neurology, Neurosciences Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Prab Prabhakar
- Department of Paediatric Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Francis Ramond
- Service de Génétique, CHU-Hôpital Nord, Saint Etienne, France
| | - Richard Sandford
- Academic Department of Medical Genetics, University of Cambridge School of Clinical Medicine, Cambridge, UK
| | - Russell Saneto
- Neuroscience Institute, Division of Paediatric Neurology, Seattle Children's Hospital and University of Washington, Seattle, Washington, USA
- Department of Neurology, Seattle Children's Hospital and University of Washington, Seattle, Washington, USA
| | - Calvin Soh
- Radiology Department, Manchester University Foundation NHS Trust, Manchester, UK
| | | | - Gopinath M Subramanian
- Department of Paediatric Neurology, John Hunter Children's Hospital, New Lambton Heights, New South Wales, Australia
| | - Kevin Talbot
- Nuffield Department of Clinical Neurosciences, Oxford University, Oxford, UK
| | - Rhys H Thomas
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Camilo Toro
- NIH Undiagnosed Diseases Program (UDP), National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Renaud Touraine
- Neuroscience Institute, Division of Paediatric Neurology, Seattle Children's Hospital and University of Washington, Seattle, Washington, USA
| | - Emma Wakeling
- North East Thames Regional Genetics Service, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Evangeline Wassmer
- Department of Paediatric Neurology, Birmingham Children's Hospital, Birmingham, UK
| | - Andrea Whitney
- University Hospital Southampton NHS Foundation Trust, Department of Paediatric Neurology, Southampton, UK
| | - John H Livingston
- Department of Paediatric Neurology, Leeds General Infirmary, Leeds, UK
| | - Raymond T O'Keefe
- Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Andrew P Badrock
- Centre for Genomic and Experimental Medicine, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
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