多巴胺D1受体基因多态性位点与海洛因依赖的关联性研究

目的 探讨多巴胺D1受体(dopamine D1 receptor,DRD1)基因第一外显子5'非翻译区内rs4532(-48A/G)和第二外显子内3'非翻译区rs686两个SNPs位点和海洛因依赖的相关性.方法 按照诊断标准,选取无亲缘关系的海洛因依赖患者238例(海洛因依赖组)及健康体检者312例(对照组),提取基因组DNA,采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术检测rs4532和rs686两个多态性位点的基因型,采用HaploView 4.0及SPSS 13.0软件分析各位点基因型、等位基因频率并比较组间差异.结果 海洛因依赖组与对照组DRD1基因rs686位点的基因型及等位基因频率分布比较,差异均有统计学意义(P＜0.05),海洛因依赖组rs686位点的等位基因A频率显著高于对照组[x2=6.005,P=0.014,OR=1.434,95%CI(1.074,1.915)].海洛因依赖组与对照组DRD1基因rs4532的基因型及等位基因频率分布比较,差异无统计学意义(P＞0.05).结论 DRD1基因rs686多态性与海洛因依赖相关,携带有rs686多态性位点A等位基因的个体可能更容易对海洛因产生依赖.

Relationship between the Polymorphisms in Dopamine D1 Receptor Gene and Heroin Dependence

Objective To study a possible association between the two SNPs of rs4532 and rs686 of the dopamine D1 receptor gene(DRD1) polymorphisms and heroin dependence.Methods Genomic DNA was isolated from the venous blood leukocytes of 238 unrelated patients with heroin dependence(heroin dependence group) and 312 healthy unrelated individuals(control group).Genotypes of these two SNPs were tested by PCR-restriction fragment length polymorphisms(PCR-RFLP).Genotype and allele frequencies were analyzed by HaploView 4.0...