Dopaminergic genes modulate response inhibition in alcohol abusing adults

Francesca M. Filbey, Eric D. Claus, Marilee Morgan, Glen R. Forester, Kent Hutchison

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Compulsion in alcohol use disorders (AUD) has been attributed to impairment in response inhibition. Because genes that regulate dopamine (DA) have been implicated not only for risk for AUD but also for impulsivity based on behavioral studies, we set out to examine the underlying neural mechanisms associated with these effects. We collected functional magnetic resonance imaging images on 53 heavy drinking but otherwise healthy adults while performing the Go/NoGo task. We predicted that genetic variants previously reported in the literature to be associated with substance abuse, specifically the DRD2 rs1799732 and DRD4 VNTR, will modulate neural processes underlying response inhibition. Our results showed differential neural response for the DRD4 VNTR during successful inhibition in the inferior frontal gyrus (IFG) (cluster-corrected P < 0.05, z = 1.9). Similarly, DRD2 rs1799732 groups were significantly different in the precuneus and cingulate gyrus during successful response inhibition (cluster-corrected P < 0.05, z = 1.9). These findings provide further evidence for the role of DAergic genes in modulating neural response in areas that underlie response inhibition and self-monitoring processes. Variants within these genes appear to influence processes related to impulsive behavior, which may increase one's risk for alcohol abuse and dependence.

Original languageEnglish (US)
Pages (from-to)1046-1056
Number of pages11
JournalAddiction Biology
Issue number6
StatePublished - Nov 2012

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Pharmacology
  • Psychiatry and Mental health


Dive into the research topics of 'Dopaminergic genes modulate response inhibition in alcohol abusing adults'. Together they form a unique fingerprint.

Cite this