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Alpha 2A adrenergic receptor gene and suicide
Adolfo Sequeira1, Firoza Mamdani, Aleksandra Lalovic
1McGill Group for Suicide Studies, Douglas Hospital, McGill University, 6875 LaSalle Blvd., Verdun, QC, Canada H4H 1R3.
Psychiatry Research
|March 10, 2004
Summary
Genetic variations in the alpha-2A adrenergic receptor gene may influence suicide risk. Specifically, the N251K variant was found exclusively in suicide cases, suggesting a potential role in a subset of individuals.
Area of Science:
- Neuroscience
- Genetics
- Psychiatry
Background:
- Suicide is a complex trait influenced by genetic factors.
- The noradrenergic system shows alterations in suicide victims.
- The alpha-2A adrenergic receptor gene is a candidate for genetic involvement in suicidal behavior.
Purpose of the Study:
- To investigate genetic variants of the alpha-2A adrenergic receptor gene in relation to suicide.
- To determine if these genetic variants modulate personality traits linked to suicidal behavior.
Main Methods:
- Studied genetic variation at four loci in the alpha-2A adrenergic receptor gene (g-1800t, c-1291 g, g-261a, N251K).
- Compared allele and genotype frequencies between suicide victims (N=110) and control subjects (N=130).
Main Results:
- No significant differences in promoter region loci (g-1800t, c-1291 g, g-261a) between groups.
- The functional N251K polymorphism's 251 K allele was present only in suicide cases (3 individuals).
- Two of the three individuals with the N251K allele were homozygous.
Conclusions:
- Preliminary findings suggest a potential role for alpha-2A adrenergic receptor gene variation in a small proportion of suicide cases.
- The N251K functional polymorphism warrants further investigation in larger cohorts.
- Genetic factors, including specific receptor gene variants, may contribute to suicidal behavior.
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