Language
English
Publication Date
7-1-2023
Journal
Genetics in Medicine
DOI
10.1016/j.gim.2023.100835
PMID
36999555
Abstract
Purpose: Miller-Dieker syndrome is caused by a multiple gene deletion, including PAFAH1B1 and YWHAE. Although deletion of PAFAH1B1 causes lissencephaly unambiguously, deletion of YWHAE alone has not clearly been linked to a human disorder.
Methods: Cases with YWHAE variants were collected through international data sharing networks. To address the specific impact of YWHAE loss of function, we phenotyped a mouse knockout of Ywhae.
Results: We report a series of 10 individuals with heterozygous loss-of-function YWHAE variants (3 single-nucleotide variants and 7 deletions < 1 Mb encompassing YWHAE but not PAFAH1B1), including 8 new cases and 2 follow-ups, added with 5 cases (copy number variants) from literature review. Although, until now, only 1 intragenic deletion has been described in YWHAE, we report 4 new variants specifically in YWHAE (3 splice variants and 1 intragenic deletion). The most frequent manifestations are developmental delay, delayed speech, seizures, and brain malformations, including corpus callosum hypoplasia, delayed myelination, and ventricular dilatation. Individuals with variants affecting YWHAE alone have milder features than those with larger deletions. Neuroanatomical studies in Ywhae-/- mice revealed brain structural defects, including thin cerebral cortex, corpus callosum dysgenesis, and hydrocephalus paralleling those seen in humans.
Conclusion: This study further demonstrates that YWHAE loss-of-function variants cause a neurodevelopmental disease with brain abnormalities.
Keywords
Humans, Animals, Mice, Brain, Lissencephaly, Neurodevelopmental Disorders, Classical Lissencephalies and Subcortical Band Heterotopias, Intellectual Disability, 14-3-3 Proteins, 14-3-3, Brain abnormalities, Miller-Dieker syndrome, Neurodevelopmental disorders, YWHAE
Published Open-Access
yes
Recommended Citation
Denommé-Pichon, Anne-Sophie; Collins, Stephan C; Bruel, Ange-Line; et al., "YWHAE Loss of Function Causes a Rare Neurodevelopmental Disease With Brain Abnormalities in Human and Mouse" (2023). Faculty and Staff Publications. 5005.
https://digitalcommons.library.tmc.edu/baylor_docs/5005
Included in
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