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Genomic and phenotypic characterization of 404 individuals with neurodevelopmental disorders caused by CTNNB1 variants

2022; Elsevier BV; Volume: 24; Issue: 11 Linguagem: Inglês

10.1016/j.gim.2022.08.006

1530-0366

Sayaka Kayumi, Luis A. Pérez‐Jurado, María Palomares‐Bralo, Sneha Rangu, Sarah E. Sheppard, Wendy K. Chung, Michael C. Kruer, Mira Kharbanda, David J. Amor, George McGillivray, Julie S. Cohen, Sixto García‐Miñaúr, Clare L. van Eyk, Kelly Harper, Lachlan A. Jolly, Dani L. Webber, Christopher Barnett, Fernando Santos‐Simarro, Marta Pacio‐Míguez, Ángela del Pozo, Somayeh Bakhtiari, Matthew A. Deardorff, Holly Dubbs, Kosuke Izumi, Katheryn Grand, Christopher Gray, Paul R. Mark, Elizabeth Bhoj, Dong Li, Xilma R. Ortiz‐González, Beth Keena, Elaine H. Zackai, Ethan M. Goldberg, Guiomar Pérez de Nanclares, Arrate Pereda, Isabel Llano‐Rivas, Ignacio Arroyo, María Ángeles Fernández-Cuesta, Christel Thauvin‐Robinet, Laurence Faivre, Aurore Garde, Benoît Mazel, Ange‐Line Bruel, Michael L. Tress, Eva H. Brilstra, Amena Smith Fine, Kylie Crompton, Alexander P.A. Stegmann, Margje Sinnema, Servi J.C. Stevens, Joost Nicolai, Gaëtan Lesca, Laurence Lion‐François, Damien Haye, Nicolas Chatron, Amélie Piton, Mathilde Nizon, Benjamin Cogné, Siddharth Srivastava, Jennifer A. Bassetti, Candace Muss, Karen W. Gripp, Rebecca Procopio, Francisca Millan, Michelle M. Morrow, Melissa Assaf, Andrés Moreno-De-Luca, Shelagh Joss, Mark Hamilton, M. Bertoli, Nicola Foulds, Shane McKee, Alastair H. MacLennan, Jozef Gécz, Mark Corbett,

Autism Spectrum Disorder Research

Germline loss-of-function variants in CTNNB1 cause neurodevelopmental disorder with spastic diplegia and visual defects (NEDSDV; OMIM 615075) and are the most frequent, recurrent monogenic cause of cerebral palsy (CP). We investigated the range of clinical phenotypes owing to disruptions of CTNNB1 to determine the association between NEDSDV and CP.Genetic information from 404 individuals with collectively 392 pathogenic CTNNB1 variants were ascertained for the study. From these, detailed phenotypes for 52 previously unpublished individuals were collected and combined with 68 previously published individuals with comparable clinical information. The functional effects of selected CTNNB1 missense variants were assessed using TOPFlash assay.The phenotypes associated with pathogenic CTNNB1 variants were similar. A diagnosis of CP was not significantly associated with any set of traits that defined a specific phenotypic subgroup, indicating that CP is not additional to NEDSDV. Two CTNNB1 missense variants were dominant negative regulators of WNT signaling, highlighting the utility of the TOPFlash assay to functionally assess variants.NEDSDV is a clinically homogeneous disorder irrespective of initial clinical diagnoses, including CP, or entry points for genetic testing.