[Relationship of polymorphisms of AhR -1661G/A with GSTP1 -313A/G and susceptibility to endometriosis].

OBJECTIVE: To investigate the association of polymorphisms of arylhydrocarbon receptor (AhR)-1661G/A with glutathione S-transferase pi (GSTP1) -313A/G and the susceptibility to endometriosis in southern Han Chinese. METHODS: Total of 432 endometriosis patients undergoing laparoscopic or laparotomy surgery matched with 493 patients with fallopian tube ligation, tubal recanalization, laparoscopic hydrotubation, benign ovarian tumor and teratoma surgeries without endometriosis as control group were enrolled in this study. The single nucleotide polymorphism (SNP) of AhR -1661G/A and GSTP1 -313A/G were detected by using a fluorescent quantitative PCR-based high resolution melting (HRM). RESULTS: The numbers of combined genotypes AhR -1661G/A and GSTP1 -313A/G were 120 patients with AG + AA, 64 patients with AG + AG, 8 patients with AG + GG, 109 patients with GG + AA, 84 patients with GG + AG, 4 patients with GG + GG, 31 patients with AA + AA, 10 patients with AA + AG, 1 patient with AA + GG at endometriosis group and 131 patients with AG + AA, 68 patients with AG + AG, 6 patients with AG + GG, 157 patients with GG + AA, 66 patients with GG + AG, 4 patients with GG + GG, 35 patients with AA + AA, 20 patients with AA + AG, 3 patients with AA + GG at endometriosis group. There was no statistically different frequencies of genotypes between endometriosis group and control group (χ(2) = 12.558, P = 0.128). Compared with genotype GG + AA, the risk of endometriosis with genotype GG + AG was increased 1.833 time (95%CI: 1.233 - 2.274). CONCLUSION: The combined genotype GG + AG [from AhR -1661G/A (GG) and GSTP1 -313A/G (AG)] might be related with susceptibility to endometriosis.