Related Experiment Videos
Serotonin transporter missense mutation associated with a complex neuropsychiatric phenotype
1Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Aichi, Japan.
Molecular Psychiatry
|November 1, 2003
Summary
A rare serotonin transporter (SERT) gene mutation, Ile425Val, is linked to obsessive-compulsive disorder (OCD) and other neuropsychiatric disorders. This coding region mutation, along with a specific untranslated region variant, appears to increase disorder risk.
Area of Science:
- Neurogenetics
- Molecular Psychiatry
Background:
- Common serotonin transporter (SERT) untranslated region (UTR) gene variants show inconclusive links to neuropsychiatric disorders.
- Focus has been on UTR variants, overlooking potential impacts of coding region mutations.
Purpose of the Study:
- To investigate the role of an uncommon coding region SERT mutation, Ile425Val, in neuropsychiatric disorders.
- To explore the combined effect of coding and UTR SERT variants on disease presentation.
Main Methods:
- Genetic analysis of two unrelated families with obsessive-compulsive disorder (OCD) and related disorders.
- Clinical assessment and diagnosis of affected family members.
- Genotyping for SERT Ile425Val mutation and 5'-UTR variants.
Main Results:
- An uncommon coding region SERT mutation, Ile425Val, was identified in two families.
- Six of seven carriers had OCD or obsessive-compulsive personality disorder.
- The most affected individuals were homozygous for the Ile425Val mutation and a high-efficacy 5'-UTR variant, suggesting a gain-of-function effect.
Conclusions:
- The SERT Ile425Val mutation is associated with OCD and other serotonin-related neuropsychiatric disorders.
- A combination of the Ile425Val mutation and a specific 5'-UTR variant may contribute to increased disease severity.
- This finding highlights the importance of coding region mutations in SERT's role in neuropsychiatric conditions.