Attempted suicide and oxytocin-related gene polymorphisms

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Oxytocin influences social behavior but is also linked to adverse mental health outcomes.
• Specific genetic variations, including OXTR rs53576 and CD38 rs3796863, are associated with depression and suicidal ideation.

Purpose of the Study:

• To investigate the relationship between OXTR rs53576 and CD38 rs3796863 genetic variations and a history of suicide attempts.
• To explore genotype associations with sex, diagnosis, abuse history, depression, suicidal ideation, and personality traits in adults with major depressive disorder or bipolar disorder.

Main Methods:

• An exploratory study was conducted on adults diagnosed with major depressive disorder (MDD) or bipolar disorder (BD).
• Genotyping for OXTR rs53576 and CD38 rs3796863 was performed.
• Statistical analyses examined the association of these genotypes with suicide attempt history and other clinical variables.

Main Results:

• The 'A' allele of OXTR rs53576 was associated with a history of suicide attempts.
• The CD38 rs3796863 genotype showed a differential effect on suicide attempt risk based on diagnosis.
• In bipolar disorder patients, CC and AC genotypes of rs3796863 were linked to higher odds of suicide attempts compared to AA.
• In major depressive disorder patients, AC genotype of rs3796863 was associated with a greater likelihood of suicide attempts compared to CC.

Conclusions:

• The study provides evidence for oxytocin's involvement in suicide attempts.
• The investigated genetic variations may serve as potential biomarkers for distinguishing between suicide attempters and non-attempters among individuals with depression.