ANÁLISE DO POLIMORFISMO DA GLUTATIONA S-TRANSFERASE M1 E T1 EM HOMENS COM INFERTILIDADE IDIOPÁTICA

Abstract

The infertility is a significant problem in the world-wide population, more than affecting 15% of the couples in reproductive age. Separately the man contributes with 50% in the conjugal infertility. The genetic causes are responsible for 60% of the cases of idiopathic infertility. The polymorphisms in genes that codify enzymes of phase II detoxificant can modify its expression or function, modifying the biometabolism of toxic composites to the male reproductive system. Genes GSTM1 and GSTT1 they codify enzymes of same name, they are basic in the process of detoxification of the endogenous or exogenous xenobiotics, facilitating its excretion. The aim of the present study was to detect the polymorphism of genes GSTM1 and GSTT1 in men with idiopathic infertility for the Service of Reproduction Human being of the Hospital das Clínicas de Goiânia (HC), according to finding of the spermograms. To the total 304 samples of patients with age between 15 had been evaluated - 69 years, diagnosis with idiopathic infertility, in the period of 2004 - 2006. The results had observed in samples of DNA of semen gen frequencies of 28,6% (30/105) for genotype GSTM1/T1 (null) in normal individuals and 50,0% (6/128) for the GSTM1/T1 (null) in abnormal individuals, demonstrating to significant relation statistics enters the polymorphism of gene GSTM1 and GSTT1 with the idiopathic male infertility. The seminal alteration associate to the polymorphic genotype of higher frequency GSTM1/T1 (null) does the number alteration (oligozoospermia) possessing bigger frequency in such a way for GSTM1 (78.9%) as well as for GSTT1 (73.7%), although not to be significant. Analyzing the genotype frequencies of the samples of blood we do not find statistical associations with male infertility, since 46.6% (34/76) are GSTM1/T1 (null) in normal individuals and 58, 4% (73/125) are GSTM1/T1 (null) in abnormal individuals. Significant influence of the consumption of alcohol, cigarette, mumps and use of xenobiotics analyzed in the basic parameters of the analyzed spermogram was not found. Polymorphic individuals for genes GSTM1 and GSTT1 are susceptiveis the reduction in the seminal quality and infertility, possibly being that oligospermic individuals are affected by the genic polymorphism.