Association of Alcohol Use Disorder Risk With ADH1B, DRD2, FAAH, SLC39A8, GCKR, and PDYN Genetic Polymorphisms

Area of Science:

• Genetics
• Psychiatry
• Public Health

Background:

• Alcohol use disorder (AUD) is a significant public health issue with a substantial genetic component.
• Genome-wide association studies (GWAS) have identified several genetic polymorphisms associated with AUD.
• Understanding genetic predisposition is crucial for developing targeted prevention and treatment strategies.

Purpose of the Study:

• To investigate the association of specific genetic variants in ADH1B, DRD2, FAAH, SLC39A8, GCKR, and PDYN genes with AUD in a Greek cohort.
• To identify potential genetic biomarkers for AUD susceptibility.

Main Methods:

• Genotyping of 251 alcohol-dependent individuals and 280 control subjects using PCR-RFLP or allele-specific PCR.
• Analysis of known variants: rs1229984 (ADH1B), rs7121986 (DRD2), rs324420 (FAAH), rs13107325 (SLC39A8), rs1260326 (GCKR), and rs2281285 (PDYN).
• Statistical analysis adjusted for age and sex, with Bonferroni correction for multiple comparisons.

Main Results:

• The FAAH rs324420 A allele was significantly associated with an increased risk of AUD (p<0.0001).
• The SLC39A8 rs13107325 T allele and ADH1B rs1229984 T allele were overrepresented in control subjects (p<0.0001 for both).
• No significant association was found for GCKR, DRD2, and PDYN polymorphisms after Bonferroni correction.

Conclusions:

• Genetic variations in FAAH, ADH1B, and SLC39A8 genes are associated with AUD susceptibility.
• These identified polymorphisms may serve as potential biomarkers for predicting AUD risk.
• Further research is warranted to validate these findings in diverse populations.