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  • Title: Polymorphisms in aryl hydrocarbon receptor gene are associated with idiopathic male factor infertility.
    Author: Safarinejad MR, Shafiei N, Safarinejad S.
    Journal: Reprod Sci; 2013 Dec; 20(12):1423-32. PubMed ID: 23703535.
    Abstract:
    We wanted to determine whether genetic polymorphisms of aryl hydrocarbon receptor (AhR) gene are associated with susceptibility to male infertility. This study comprised 176 men with idiopathic infertility and 352 healthy fertile men who served as controls. Seven single-nucleotide polymorphisms (SNPs) of the AhR gene (rs2066853, rs1476080, rs10250822, rs10247158, rs2282885, rs6960165, and rs7811989) were selected and genotyped by the polymerase chain reaction-restriction fragment length polymorphism analysis. The serum levels of reproductive and thyroid hormones and inhibin B were also measured. After multiple regression analysis, 2 of the 7 studied SNPs were significantly associated with the occurrence of male infertility. Men with rs2066853 AA genotype had 33% decreased risk of being infertile (odds ratio [OR] = 0.67, 95% confidence interval [CI]: 0.46-0.87; P = .003). The C allele of rs2282885 was significantly associated with infertility risk, with an OR of 2.14 (95% CI: 1.64-3.72) for heterozygotes and 3.54 (95% CI: 2.25-5.84) for homozygotes. When haplotypes were composed of 7 AhR SNP sites, patients with AACACAG haplotype harbored more than 75% decreased risk of being infertile (OR = 0.21, 95% CI: 0.11-0.32; P = .001). Conversely, carriers of the AACACGA haplotype had more than 12-fold increased risk of being infertile (OR = 12.62, 95% CI: 2.77-52.74; P = .00001). Homozygosity for the rs2066853 A allele and rs2282885 C allele decreases and increases the risk of developing male infertility, respectively.
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