Publications by authors named "Aline Vincent-Devulder"
Background: Variants in GABRB2, encoding the β2 subunit of the γ-aminobutyric acid type A (GABA) receptor, can result in a diverse range of conditions, ranging from febrile seizures to severe developmental and epileptic encephalopathies. However, the mechanisms underlying the risk of developing milder vs more severe forms of disorder remain unclear. In this study, we conducted a comprehensive genotype-phenotype correlation analysis in a cohort of individuals with GABRB2 variants.
View Article and Find Full Text PDFBlepharophimosis with intellectual disability and Helsmoortel-Van Der Aa Syndrome share episignature and phenotype.
Am J Med Genet C Semin Med Genet
December 2024
Blepharophimosis with intellectual disability (BIS) is a recently recognized disorder distinct from Nicolaides-Baraister syndrome that presents with distinct facial features of blepharophimosis, developmental delay, and intellectual disability. BIS is caused by pathogenic variants in SMARCA2, that encodes the catalytic subunit of the superfamily II helicase group of the BRG1 and BRM-associated factors (BAF) forming the BAF complex, a chromatin remodeling complex involved in transcriptional regulation. Individuals bearing variants within the bipartite nuclear localization (BNL) signal domain of ADNP present with the neurodevelopmental disorder known as Helsmoortel-Van Der Aa Syndrome (HVDAS).
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- Duplications of the 3q29 chromosomal region are rare genetic variations linked to diverse neurodevelopmental disorders, often causing learning disabilities and neuropsychiatric issues.
- A study involving 31 families revealed different sizes of 3q29 duplications: 14 recurrent, 8 overlapping, and 9 smaller ones, with some patients showing additional genetic factors influencing their conditions.
- Most patients exhibited mild neurodevelopmental disorders, with many duplications being inherited and associated with low rates of intellectual disabilities, suggesting that severe cases might require more detailed genetic examination.
Article Synopsis
- The translation elongation factor eEF1A2 is crucial for binding aminoacyl-tRNA to the ribosome, and since 2012, 21 harmful variants have been linked to severe neurodevelopmental disorders, including epilepsy and intellectual disabilities.
- A recent study gathered 26 patients with EEF1A2 variants, revealing a milder clinical profile than previously reported, with higher walking and language skills and lower rates of intellectual disability and epilepsy.
- The research identified 8 new EEF1A2 variants and suggests that severe and moderate phenotypes are linked to specific protein regions affecting GTP exchange, while milder variants may affect secondary functions, contributing to a broader understanding
Recurrent 1q21.1 copy number variants (CNVs) have been associated with a wide spectrum of clinical features, ranging from normal phenotype to moderate intellectual disability, with congenital anomalies and dysmorphic features. They are often inherited from unaffected parents and the pathogenicity is difficult to assess.
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