Two Sisters From Qatar With TUSC3 Genetic Mutation: Psychiatric Considerations

Area of Science:

• Genetics
• Neuroscience
• Pediatrics

Background:

• Tumor suppressor candidate 3 (TUSC3) gene mutations are linked to autosomal recessive intellectual disability (ARID).
• Intellectual disability presents with diverse behavioral and developmental challenges.
• Understanding genotype-phenotype correlations is crucial for targeted interventions.

Observation:

• Two sisters from consanguineous Qatari family presented with ARID due to a TUSC3 gene mutation.
• Observed behavioral manifestations included aggression, impulsivity, hyperactivity, emotional dysregulation, and abnormal sleep/eating patterns.
• Initial management involved behavioral therapy and psychotropic medications.

Findings:

• Guanfacine treatment (2mg daily) significantly reduced aggressive behavior, hyperactivity, impulsivity, and insomnia in the affected sisters.
• The study highlights the efficacy of specific pharmacotherapy in managing TUSC3-related behavioral phenotypes.
• This is the first report of TUSC3 gene mutations in Qatar.

Implications:

• This research expands the known spectrum of TUSC3-associated intellectual disability and its behavioral comorbidities.
• It underscores the importance of genetic testing and comprehensive management strategies for rare neurodevelopmental disorders.
• Further research is warranted to elucidate the precise role of TUSC3 in neurodevelopment and to optimize treatment protocols.