COMT polymorphisms in impulsively violent offenders with antisocial personality disorder

Area of Science:

• Genetics
• Forensic Psychology
• Neuroscience

Background:

• The catechol-O-methyltransferase (COMT) enzyme plays a crucial role in neurotransmitter metabolism.
• Genetic variations, or polymorphisms, in the COMT gene may influence behavior.
• Understanding the genetic underpinnings of violent behavior is important for both clinical and legal contexts.

Purpose of the Study:

• To investigate the association between specific COMT gene polymorphisms and violent behavior in non-psychotic offenders.
• To examine the role of COMT Val158Met and COMT Ala146Val polymorphisms in individuals diagnosed with Antisocial Personality Disorder (APD).

Main Methods:

• An association study was conducted comparing 47 male individuals with APD and a history of impulsive violent attacks to 43 matched healthy male controls.
• Three COMT polymorphisms were analyzed: COMT Val158Met (exon 4), COMT Ala146Val (exon 4), and a regulatory polymorphism in exon 6 (del/C deletion-insertion).

Main Results:

• The COMT Val158Met polymorphism showed no significant association with violence in the APD group.
• The COMT Ala146Val polymorphism was found to be significantly more frequent among violent offenders with APD compared to controls (p=0.017).

Conclusions:

• The findings suggest that COMT gene polymorphisms can act as modifying factors influencing individual differences in violent behavior.
• The COMT Ala146Val polymorphism may be a genetic marker associated with increased proclivity for violence in individuals without major mental disorders.