Citations 2
Loss‐of‐Function Variants in CUL3 Cause a Syndromic Neurodevelopmental Disorder
Blackburn, Patrick R. , Herkert, Johanna C. , Rinne, Tuula , Thiffault, Isabelle, Rapp, Michele, Alders, Mariel, Maas, Saskia M. , Gérard, Bénédicte, Smol, Thomas , Vincent‐Delorme, Catherine , Isidor, Bertrand , Joset, Pascal , Husson, Thomas , Guerrot, Anne‐Marie , Bacino, Carlos A. , Macmurdo, Colleen, Thompson, Stephanie S., Faivre, Laurence , Deb, Wallid , Vignard, Virginie , Goldenberg, Alice, Lecoquierre, François , Zech, Michael , Necpál, Ján , Winkelmann, Juliane , Koprušáková, Monika Turčanová , Konstantopoulou, Vassiliki , Younce, John R. , Mighton, Chloe, Fung, Charlotte, Morel, Chantal F. , Barth, Magalie , Krapels, Ingrid P.C. , Schoot, Vyne van der , Bußmann, Cornelia, Wortmann, Saskia B. , Ravelli, Claudia , Keren, Boris , Ziegler, Alban , Hasadsri, Linda , Pichurin, Pavel N. , Klee, Eric W. , Grand, Katheryn , Sanchez‐Lara, Pedro A. , Krüger, Elke , Klinkhammer, Hannah , Tartaglia, Marco , Wang, Tianyun , Prokisch, Holger , Shinawi, Marwan , Brunet, Theresa , Tartaglia, Marco , Wang, Tianyun , Lecoquierre, Francois , Faivre, Laurence , Ebstein, Frédéric , Hsieh, Tzung‐Chien , Motta, Marialetizia , Radio, Francesca Clementina , Cogné, Benjamin , Vincent, Marie , Bachmann‐Gagescu, Ruxandra , Rauch, Anita , Ferrero, Giovanni Battista , Ciolfi, Andrea , Rosenfeld, Jill A. , Mau‐Them, Frédéric Tran , Agrawal, Pankaj B. , Madden, Jill A. , Goldenberg, Alice , Jech, Robert , Shinawi, Marwan , Lerner‐Ellis, Jordan P. , DiTroia, Stephanie P. , Bonneau, Dominique , Stegmann, Alexander P.A. , Mignot, Cyril , Zampino, Giuseppe , Mayr, Johannes A , Feichtinger, René G. , Courtin, Thomas , Bezieau, Stéphane , Krawitz, Peter Michael , Eichler, Evan E , Küry, Sébastien
Annals of Neurology | September 20, 2024 | Volume: 97 | Issue: 1 | Pages: 76-89
ObjectiveDe novo variants in cullin‐3 ubiquitin ligase (CUL3) have been strongly associated with neurodevelopmental disorders (NDDs), but no large case series have been reported so far. Here, we aimed to collect sporadic cases carrying rare variants in CUL3, describe the genotype–phenotype correlation, and investigate the underlying pathogenic mechanism.MethodsGenetic data and detailed clinical records were collected via multicenter collaboration. Dysmorphic facial features were analyzed using GestaltMatcher. Variant effects on CUL3 protein stability were assessed using patient‐derived T‐cells.ResultsWe assembled a cohort of 37 individuals with heterozygous CUL3 variants presenting a syndromic NDD characterized by intellectual disability with or without autistic features. Of these, 35 have loss‐of‐function (LoF) and 2 have missense variants. CUL3 LoF variants in patients may affect protein stability leading to perturbations in protein homeostasis, as evidenced by decreased ubiquitin‐protein conjugates in vitro. Notably, we show that 4E‐BP1 (EIF4EBP1), a prominent substrate of CUL3, fails to be targeted for proteasomal degradation in patient‐derived cells.InterpretationOur study further refines the clinical and mutational spectrum of CUL3‐associated NDDs, expands the spectrum of cullin RING E3 ligase‐associated neuropsychiatric disorders, and suggests haploinsufficiency via LoF variants is the predominant pathogenic mechanism. ANN NEUROL 2025;97:76–89
Expanding the phenotype of ASXL3‐related syndrome: A comprehensive description of 45 unpublished individuals with inherited and de novo pathogenic variants in ASXL3
Schirwani, Schaida , Albaba, Shadi , Carere, Deanna Alexis , Sacoto, María J. Guillen , Zamora, Francisca Milan, Si, Yue , Rabin, Rachel , Renaud, Deborah L. , Hauser, Natalie , Blanchet, Patricia, Foulds, Nichola, Dixit, Abhijit , Fisher, Richard, Armstrong, Ruth, Isidor, Bertrand , Demirdas, Serwet , Dykzeul, Natalie, Cohen, Julie S. , Grand, Katheryn , Swols, Dayna Morel , Albassam, Hessa F., Naik, Swati , Ragge, Nicola , Tedesco, Maria Giovanna , Harrison, Rachel , Bouman, Arjan , Palen, Emily, Challman, Thomas D. , Willemsen, Marjolein H. , Vogt, Julie , Cunniff, Christopher , Bergstrom, Katherine , Bruel, Ange‐Line , Kini, Usha , Alkuraya, Fowzan S. , Slegesky, Valerie, Meeks, Naomi, Girotto, Paula Natale , Johnson, Diana , Study, DDD, Newbury‐Ecob, Ruth , Lynch, Sally Ann , Graham, John M. , Balasubramanian, Meena , Hauser, Natalie , Schrier Vergano, Samantha , Bouman, Arjan , Cunniff, Christopher , Bergstrom, Katherine , Bruel, Ange-Line , Alkuraya, Fowzan S , Prontera, Paolo , Li, Dong , Graham, John M , Zamora, Francisca Millan, Pappas, John , Reid, Evan , Cogné, Benjamin , Vergano, Samantha A. Schrier , Slavotinek, Anne , Naik, Swati, Dean, John , Costa, Cinzia , Walia, Jagdeep Singh , Study, DDD, Ockeloen, Charlotte W. , Li, Dong , Pierson, Tyler Mark
American Journal of Medical Genetics Part A | August 26, 2021 | Volume: 185 | Issue: 11 | Pages: 3446-3458
AbstractThe study aimed at widening the clinical and genetic spectrum of ASXL3‐related syndrome, a neurodevelopmental disorder, caused by truncating variants in the ASXL3 gene. In this international collaborative study, we have undertaken a detailed clinical and molecular analysis of 45 previously unpublished individuals with ASXL3‐related syndrome, as well as a review of all previously published individuals. We have reviewed the rather limited functional characterization of pathogenic variants in ASXL3 and discuss current understanding of the consequences of the different ASXL3 variants. In this comprehensive analysis of ASXL3‐related syndrome, we define its natural history and clinical evolution occurring with age. We report familial ASXL3 pathogenic variants, characterize the phenotype in mildly affected individuals and discuss nonpenetrance. We also discuss the role of missense variants in ASXL3. We delineate a variable but consistent phenotype. The most characteristic features are neurodevelopmental delay with consistently limited speech, significant neuro‐behavioral issues, hypotonia, and feeding difficulties. Distinctive features include downslanting palpebral fissures, hypertelorism, tubular nose with a prominent nasal bridge, and low‐hanging columella. The presented data will inform clinical management of individuals with ASXL3‐related syndrome and improve interpretation of new ASXL3 sequence variants.