Alves MMC, Almeida M, Oliani AH, Breitenfeld L, Ramalhinho AC. Women with polycystic ovary syndrome and other causes of infertility have a higher prevalence of GSTT1 deletion.
Reprod Biomed Online 2020;
41:892-901. [PMID:
32855063 DOI:
10.1016/j.rbmo.2020.06.010]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 06/05/2020] [Accepted: 06/15/2020] [Indexed: 10/24/2022]
Abstract
RESEARCH QUESTION
Is GSTM1 and GSTT1 deletion associated with the development of polycystic ovary syndrome (PCOS)?
DESIGN
A case-control study was designed to investigate the association between GSTM1 and GSTT1 gene polymorphisms with PCOS. Blood samples from 201 women diagnosed with infertility were taken, of which 69 women were diagnosed with PCOS. Genomic DNA was extracted, and genotyping analyses were conducted by polymerase chain reaction-based methods. Odds ratios and 95% confidence intervals were calculated by unconditional logistic regression.
RESULTS
An increased risk of PCOS was found to be associated with GSTT1 null genotype (OR 4.890, 95% CI 2.261 to 9.122; P < 0.001). A strong association between GSTT1 null genotype was found with female infertility, regardless of the associated cause (OR 5.300, 95% CI 3.238 to 8.675; P < 0.001) as well as with the GSTM1 null genotype (OR 1.620, 95% CI 1.067 to 2.459; P = 0.026). A statistically significant association with the development of infertility was also found when carriers of the combined genotype GSTT1+/GSTM1+ was compared with carriers of the combined genotype GSTT1-/ GSTM1+ (OR 3.600 95% CI 1.864 to 6.956; P < 0.001). The two-way combination of GSTT1 and GSTM1 null genotypes resulted in an increased susceptibility to infertility development (OR 11.136; 95% CI 5.035 to 24.629; P < 0.001).
CONCLUSIONS
Carriers of GSTT1 null genotype seem to have higher susceptibility to developing PCOS and infertility from other causes. Also, GSTT1 null genotype, alone or in association, are related with increased susceptibility to infertility development, independently of its cause. GSTM1 null genotype is only associated with all cause of infertility when the GSTT1 is null.
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