[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.