[The association of GSTP1 polymorphisms with male idiopathic infertility].

AIM: To identify the association between Ile105Val, Ala114Val polymorphisms of gene GSTP1 (glutathione transferase pi1) and infertility in Russian men. MATERIALS AND METHODS: A total of 160 infertile Russian men of reproductive age (mean age 30.2+/-3.6 years) were included in study group, while in control group there were 104 age-matched healthy fertile Russian male (mean age 31.3+/-5.4 years). Molecular and genetic studies of Ile105Val, Ala114Val polymorphisms of gene GSTP1 were performed using real-time polymerase chain reaction. Genomic DNA was extracted from the peripheral blood. RESULTS: A frequency of genotypes (p=0.024; df=2; p=0.024) and alleles (z=2,778; p=0,005) of Ile105Val locus was significantly different in the study and control group. In the study group, there was an increase in the frequency of the Ile/Ile genotype by 13% (=3.995; df=1; p=0.046) and a decrease in the frequency of the Val/Val genotype by 6% (=4.887; df=1; p=0.027). A rate of genotype Ile/Ile in infertile men with was 1.7 time higher than in control group (odds ratio (OR):1.73; 95% confidence interval (Cl): 1.04-2.87; p<0.05). There was not significant difference in frequency of genotypes and alleles of Ala114Val polymorphism of gene GSTP1 between the study and control groups. CONCLUSIONS: The male infertility in Russia is associated with Ile105Val polymorphism and not associated with Ala114Val polymorphism of gene GSTP1. In infertile men wild-type genotype and major allele Ile105Val polymorphism of gene GSTP1 were significant more frequent compared to control group. A rate of genotype Ile/Ile in men with infertility was 1.7 time higher.

[Association of polymorphism of GSTT1 and GSTM1 genes with infertility in men].

AIM: To identify the association between homozygous deletion genotypes of glutathione transferase genes GSTT1 (glutathione transferase theta 1), GSTM1 (glutathione S-transferase mu1) and infertility in Russian men. MATERIALS AND METHODS: The article presents a comparative analysis of the incidence of homozygous deletion genotypes of glutathione transferase genes GSTM1 and GSTT1 in Russian men with and without infertility. The study group comprised 160 infertile Russian men of reproductive age (mean age 30.2+/-3.6 years.) The infertility diagnosis was verified according to the WHO guidelines. The control group comprised 104 healthy Russian volunteers (mean age 31.3+/-5.4 years.) Molecular genetic detection of GSTM1 and GSTT1 deletion polymorphisms was performed using PCR. The genomic DNA for the study was extracted from whole blood samples. RESULTS: The study and control group differed significantly in incidence of GSTM1 (p=0.043) and GSTT1 (p=0.008) deletion polymorphisms. The probability of detecting "zero" genotypes of the GSTT1 and GSTM1 genes in infertile men was 2.5 (p<0.05) and 1.7 times higher (p<0.05), respectively, than in fertile men. CONCLUSIONS: Therefore, the study findings allow us to conclude that the deletion genotypes of GSTM1 and GSTT1 are associated with infertility in Russian men. Molecular genetic analysis of deletion polymorphism of glutathione transferase genes can be recommended for a comprehensive examination of infertile men.