The research of genes series polymorphisms of brain neurotransmitter system and of the opioid reception at narcotized persons

Abstract

Alleles frequencies and polymorphisms genotypes frequencies of gene DRD4 (VNTR), gene DAT (VNTR), gene 5-HTT (VNTR and ID) and gene OPRM1 (SNP) were investigated at Russian males taking narcotic substances. It was determined that genotype 4/3 occurs only at persons taking narcotic substances, the most often occurring polymorphism of gene DRD4 is genotype 4/4 in all groups. It was detected that the polymorphism of gene DAT at narcotized persons is presented by the high enough part of genotypes 9/10 and 10/10, but in the rest of groups the distribution is the same. At narcotized persons and in the control group, the carriers’ part of genotype I/D of gene 5НТ2А is high. The genotype D/D occurs only at persons taking narcotic substances. The genotype10/10 of gene 5НТ2А occurs more often than in population group, which conforms to the literature data.