Heroin dependence is a debilitating psychiatric disorder with a complex inheritance mechanism. Genetic polymorphisms in functional regions of the glutamate receptor, N-methyl D-aspartate 2A (GRIN2A) gene, which encodes the 2A subunit of the N-methyl D-aspartate (NMDA) receptor, may modulate the risk of heroin addiction. We investigated the potential association between 8 single nucleotide polymorphisms (SNPs) of the GRIN2A gene (SNPs rs3219790, rs1014531, rs8044472, rs8045712, rs9933624, rs9940680, rs1420040, and rs767749) and heroin addiction using the MassARRAY system and GeneScan. A total of 405 heroin-addicted patients and 397 healthy control subjects were recruited for this study. Statistically significant differences were observed for rs3219790 in the promoter region of the GRIN2A gene.
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