1. ARID2-related disorder: further delineation of the clinical phenotype of 27 novel individuals and description of an epigenetic signature
- Author
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Houdayer, Clara, Rooney, Kathleen, van der Laan, Liselot, Bris, Céline, Alders, Mariëlle, Bahr, Angela, Barcia, Giulia, Battault, Clarisse, Begemann, Anais, Bonneau, Dominique, Bonnevalle, Antoine, Boughalem, Aicha, Bourges, Alice, Bournez, Marie, Bruel, Ange-Line, Buhas, Daniela, Carallis, Floriane, Cogné, Benjamin, Cormier-Daire, Valérie, Delanne, Julian, Demaret, Tanguy, Denommé-Pichon, Anne-Sophie, Désir, Julie, Dubourg, Christèle, Fradin, Mélanie, Geneviève, David, Goel, Himanshu, Goldenberg, Alice, Gripp, Karen W., Guichet, Agnès, Guimier, Anne, Jacquinet, Adeline, Keren, Boris, Legoff, Louis, Levy, Michael A., McConkey, Haley, Mendelsohn, Bryce A., Mignot, Cyril, Milon, Vincent, Nizon, Mathilde, Oneda, Beatrice, Pasquier, Laurent, Patat, Olivier, Philippe, Christophe, Procaccio, Vincent, Procopio, Rebecca, Prouteau, Clément, Rambaud, Thomas, Rauch, Anita, Relator, Raissa, Rondeau, Sophie, Santen, Gijs W E., Schleit, Jennifer, Sorlin, Arthur, Steindl, Katharina, Tedder, Matt, Tessarech, Marine, Mau-Them, Frédéric Tran, Trost, Detlef, Van der Sluijs, Pleuntje J, Vincent, Marie, Whalen, Sandra, Thauvin-Robinet, Christel, Isidor, Bertrand, Sadikovic, Bekim, Vitobello, Antonio, and Colin, Estelle
- Abstract
Rare genetic variants in ARID2are responsible for a recently described neurodevelopmental condition called ARID2-related disorder (ARID2-RD). ARID2 belongs to PBAF, a unit of the SWI/SNF complex, which is a chromatin remodeling complex. This work aims to further delineate the phenotypic spectrum of ARID2-RD, providing clinicians with additional data for better care and aid in the future diagnosis of this condition. We obtained the genotypes and phenotypes of 27 previously unreported individuals with ARID2-RD and compared this series with findings in the literature. We also assessed peripheral blood DNA methylation profiles in individuals with ARID2-RD compared to episignatures of controls, unresolved cases, and other neurodevelopmental disorders. The main clinical features of ARID2-RD are developmental delay, speech disorders, intellectual disability (ID), behavior problems, short stature, and various dysmorphic and ectodermal features. Genome-wide differential methylation analysis revealed a global hypermethylated profile in ARID2-RD that could aid in reclassifying variants of uncertain significance. Our study doubles the number of reported individuals with ARID2pathogenic variants to 53. It confirms loss-of-function as a pathomechanism and shows the absence of a clear genotype-phenotype correlation. We provide evidence for a unique DNA methylation episignature for ARID2-RD and further delineate the ARID2-associated phenotype.
- Published
- 2025
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