Glutathione S-transferase omega gene polymorphism as a biomarker for human papilloma virus and cervical cancer in Iranian women

Abstract

Objective: Human papillomavirus (HPV) infection is an important sexually-transmitted infection worldwide. Persistent infections with differenthigh-risk HPV genotypes may cause cervical intraepithelial neoplasia and cervical cancer. Single nucleotide polymorphisms of glutathioneS-transferase omega (GSTO) 1 and 2 play an important role in cancer progression. To evaluate GSTO gene polymorphism influence on women’ssusceptibility to low-risk or high-risk HPV infections and also risk of cervical cancer development.Material and Methods: We examined 50 patients with cervical cancer, 43 patients who were positive for HPV, and 43 healthy individuals asnegative controls. We used polymerase chain reaction-restriction fragment length polymorphism to determine GSTO1 A140D and GSTO2 N142Dvariants in study participants.Results: We found a significant association between the GSTO1 A140D gene polymorphism and HPV 6, 16, 18, 16/18 infections and cervicalcancer in Iranian women. We noted a significant difference for the 140AD/142NN combination genotype between patients in the cervical cancergroup and healthy controls. There were no significant differences for the GSTO2 N142D genotype and allele frequencies between the patient (i.e.,cervical cancer and HPV-positive) groups and controls.Conclusion: The 140AD genotype, 140D allele, and 140AD/142NN combination genotype seem to confer a protective property in women’ssusceptibility to HPV 6, 16, 18, 16/18 infections and cervical cancer. However, the GSTO2 N142D polymorphism is not associated with HPVinfections and cervical cancer. It would appear that GSTO1 A140D SNPs likely play a role in the level of susceptibility to HPV-related cervicalcancer. (J Turk Ger Gynecol Assoc 2018; 19: 193-200)