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  • Title: Association of OPRD1 Gene Variants with Opioid Dependence in Addicted Male Individuals Undergoing Methadone Treatment in the North of Iran.
    Author: Sharafshah A, Fazel H, Albonaim A, Omarmeli V, Rezaei S, Mirzajani E, Ajamian F, Keshavarz P.
    Journal: J Psychoactive Drugs; 2017; 49(3):242-251. PubMed ID: 28632076.
    Abstract:
    Genetic association of rs678849 along with neuroimaging and biomarker phenotypes, parallel with the known involvements of the OPRD1 in drug abuse, provided additional support for targeting these receptors as potential therapeutic targets in both neurodegenerative diseases and neuropsychiactric disorders such as Alzheimer's disease. Samples were selected among 202 opium-addicted participants undergoing methadone treatment and 202 healthy controls. Genomic DNA of all subjects was extracted from whole blood samples through a Salting Out procedure. Four variants (rs678849, 2236857, 2236855, and 760589) were genotyped in the studied subjects using ARMS-PCR. The analysis was performed using SNPalyze and SPSS ver.20 software. According to single locus analysis, rs678849 under dominant model (p < 0.001), rs2236857 under recessive model (p = 0.006), and the two variants, rs2236855 and rs760589 under co-dominant model, showed significant contributions between groups (p = 0.001 and p = 0.009, respectively). rs2236855 was associated with the development of libido dysfunction in opium-addicted patients undergoing methadone treatment (p = 0.011). Through haplotype analyses, five haplotypes with frequency of more than 5% displayed significant association with opioid dependence in study participants. In conclusion, the four studied OPRD1 gene variants and their haplotypes can play important roles in susceptibility to opioid dependence.
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