Genetic features of the dopaminergic neurotransmitter system in patients with alcohol dependence and depression comorbidity
Aim. Test the hypothesis about the effect of polymorphisms of the DA system on the risk of developing depression in patients with alcohol dependence. Material and methods. 104 patients: 64 patients with a combination of diagnoses of “alcohol dependence” and “depression” (F10.2 and F32, F33 according to ICD-10, average age 41.23 ± 9.903 years) and 40 patients with a diagnosis of alcohol dependence (F10.2 according to ICD-10, average age 45.57 ± 10.853 years) and 113 control (average age 43.65 ± 4.318 years). Results. In patients with a combination of AD and depression, the frequency of occurrence of the C allele C polymorphism rs1611115 of the DBH gene is higher than in the control group (p = 0.087, trend). In patients with a combination of AD and depression, the frequency of occurrence of the A allele of the rs1108580 polymorphism of the DBH gene is higher than in patients with AD (p = 0.059, trend). In patients with AD allele A., the DBH gene rs1108580 polymorphism increases the risk of depression by 174.0% (p = 0.009), the DBH gene rs1108580 AA polymorphism increases the risk of depression by 684.1% (p = 0.010), the rs1108580 gene AG polymorphism rs1108580 in the gene DBH increases the risk of depression by 261.1% (p = 0.010). Conclusion. It has been shown for the first time that polymorphic variants of the rs1108580 locus of the DBH gene act as important risk factors for depression in patients with AD. Polymorphism rs1611115 of the DBH gene can also play an important role in the development of depression in patients with AD, which requires further study.