Sistema de Salut de Catalunya
Institut Català de la Salut
[Salpietro V] Department of Neuromuscular Disorders, UCL Queen Square Institute of Neurology, London, UK. Pediatric Neurology and Muscular Diseases Unit, IRCCS Istituto "Giannina Gaslini", Genoa, Italy. Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy. [Dixon CL, Bello OD] Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK. [Guo H] Department of Genome Sciences, University of Washington School of Medicine, Seattle, USA. Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China. [Vandrovcova J] Department of Neuromuscular Disorders, UCL Queen Square Institute of Neurology, London, UK. [Efthymiou S] Department of Neuromuscular Disorders, UCL Queen Square Institute of Neurology, London, UK. Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK. [Raspall-Chaure M, Macaya A] Servei de Neurologia Pediatrica, Hospital Universitari Vall d'Hebron, Barcelona, Spain. Universitat Autònoma de Barcelona, Barcelona, Spain.
Vall d'Hebron Barcelona Hospital Campus
2019-08-09T06:48:01Z
2019-08-09T06:48:01Z
2019-07-12
Neurodevelopmental disorders; AMPA; GluA2
Trastorns del neurodesenvolupament; AMPA; GluA2
Trastornos del neurodesarrollo; AMPA; GluA2
AMPA receptors (AMPARs) are tetrameric ligand-gated channels made up of combinations of GluA1-4 subunits encoded by GRIA1-4 genes. GluA2 has an especially important role because, following post-transcriptional editing at the Q607 site, it renders heteromultimeric AMPARs Ca2+-impermeable, with a linear relationship between current and trans-membrane voltage. Here, we report heterozygous de novo GRIA2 mutations in 28 unrelated patients with intellectual disability (ID) and neurodevelopmental abnormalities including autism spectrum disorder (ASD), Rett syndrome-like features, and seizures or developmental epileptic encephalopathy (DEE). In functional expression studies, mutations lead to a decrease in agonist-evoked current mediated by mutant subunits compared to wild-type channels. When GluA2 subunits are co-expressed with GluA1, most GRIA2 mutations cause a decreased current amplitude and some also affect voltage rectification. Our results show that de-novo variants in GRIA2 can cause neurodevelopmental disorders, complementing evidence that other genetic causes of ID, ASD and DEE also disrupt glutamatergic synaptic transmission.
Supported by the Wellcome Trust (WT093205MA and WT104033AIA), Medical Research Council (H.H. and D.M.K.), European Community’s Seventh Framework Programme (FP7/2007‐2013, under grant agreement No. 2012‐305121 to H.H.), Muscular Dystrophy Association (MDA), Muscular Dystrophy UK, The MSA Trust, Ataxia UK, The Sparkes Children’s Medical Research Charity, The Great Ormond Street Hospital Charity, Rosetrees Trust, Brain Research UK, The UK HSP Society, The European Union’s Horizon 2020 research and innovation programme Solve-RD project (No 779257), The Pakistan Council (Scholarship to HT), The National Natural Science Foundation of China (31671114, 81871079, 81330027, and 81525007 to H.G. and K.X.), the US National Institutes of Health (NIH grant R01MH101221 to E.E.E), the National Institute for Health Research (NIHR) University College London Hospitals (UCLH) and the Biomedical Research Centre (BRC)
Article
Published version
English
Trastorns del desenvolupament - Aspectes genètics; Proteïnes de membrana; Mutació (Biologia); PSYCHIATRY AND PSYCHOLOGY::Mental Disorders::Neurodevelopmental Disorders; Other subheadings::Other subheadings::Other subheadings::/genetics; CHEMICALS AND DRUGS::Amino Acids, Peptides, and Proteins::Proteins::Carrier Proteins::Membrane Transport Proteins::Ion Channels::Ligand-Gated Ion Channels::Receptors, Ionotropic Glutamate::Receptors, AMPA; PHENOMENA AND PROCESSES::Genetic Phenomena::Genetic Variation::Mutation; PSIQUIATRÍA Y PSICOLOGÍA::trastornos mentales::trastornos del desarrollo neurológico; Otros calificadores::Otros calificadores::Otros calificadores::/genética; COMPUESTOS QUÍMICOS Y DROGAS::aminoácidos, péptidos y proteínas::proteínas::proteínas transportadoras::proteínas de transporte de membrana::canales iónicos::canales iónicos de apertura por ligandos::receptores ionotrópicos de glutamato::receptores AMPA; FENÓMENOS Y PROCESOS::fenómenos genéticos::variación genética::mutación
Nature Research
Nature Communications;10(1)
https://www.nature.com/articles/s41467-019-10910-w
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
Articles científics - HVH [3439]
