Case Report: A Novel GNB1 Mutation Causes Global Developmental Delay With Intellectual Disability and Behavioral
Jorge Diogo Da Silva1,2,3, Marta Daniela Costa1,2, Bruno Almeida1,2
1Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.
Frontiers in Neurology
|October 14, 2021
Summary
A novel GNB1 gene mutation was identified in a patient with severe neurodevelopmental disorders, including global developmental delay and behavioral issues. This finding expands the known spectrum of GNB1 encephalopathy and aids in understanding its genetic basis.
Area of Science:
- Genetics
- Neuroscience
- Molecular Biology
Background:
- Neurodevelopmental diseases present with a wide range of neurological and psychiatric symptoms.
- Genetic factors are increasingly identified as causes of neurodevelopmental disorders, with hundreds of genes implicated.
Observation:
- A patient presented with severe global developmental delay, intellectual disability, and behavioral disorders (ADHD, ASD, aggression).
- Genetic testing revealed a novel pathogenic variant (c.217G>A, p.A73T) in the GNB1 gene.
Findings:
- The identified GNB1 variant is a missense mutation located in a known mutational hotspot.
- In silico analysis suggests the mutation disrupts the GNB1 protein's WD40 domain, potentially impairing G-protein interactions and signal transduction.
Implications:
- This case expands the clinical and genetic understanding of GNB1 encephalopathy.
- Further research into GNB1-related disorders may lead to improved diagnostics and targeted therapeutic strategies.
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