Age-Related Characteristics of SYT1-Associated Neurodevelopmental Disorder

Area of Science:

• Neurodevelopmental disorders
• Genetics
• Clinical neurology

Background:

• SYT1-associated neurodevelopmental disorder, also known as Baker-Gordon syndrome, presents a complex clinical picture.
• Understanding its progression from infancy to adulthood is crucial for diagnosis and management.

Purpose of the Study:

• To describe the clinical, developmental, neuroradiological, and electrophysiological features of SYT1-associated neurodevelopmental disorder.
• To explore age-related changes and brain-symptom associations in affected individuals.

Main Methods:

• Recruitment of participants through the UK-based Brain and Behavior in Neurodevelopmental Disorders of Genetic Origin project.
• Collection of medical history, neurodevelopmental measures, MRI, and EEG data.
• Systematic analysis of age-related manifestations and neuroimaging, with balanced accuracy testing for brain-symptom associations.

Main Results:

• Study of 40 individuals with 30 distinct de novo SYT1 variants, including 10 novel ones.
• Observed age-related trends: resolution of hypotonia, worsening movement disorders, sleep difficulties, and self-injurious behaviors; prominent and progressive social-communicative impairments.
• High rates of abnormalities: 45% MRI, 93% EEG; epileptiform activity linked to movement disorders, irregular sleep EEG to sleep/respiratory issues.

Conclusions:

• The study characterizes the wide spectrum and age-related progression of clinical and brain findings in SYT1-associated neurodevelopmental disorder.
• Further research is necessary to understand individual variability and develop targeted interventions for improved quality of life.