Glutathione S-transferase M1 and T1 gene polymorphisms in Brazilian women with endometriosis

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This study compared GSTM1 and GSTT1 gene polymorphisms in Brazilian women with and without endometriosis, finding no difference in GSTM1 but a higher prevalence of GSTT1 null genotype in controls.

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This case-control study investigated the association between glutathione S-transferase M1 (GSTM1) and T1 (GSTT1) gene polymorphisms and endometriosis in a cohort of Brazilian women. Researchers compared genotypes from 121 patients with surgically confirmed endometriosis against 97 controls without the disease, analyzing potential links to menstrual cycle intervals. The results indicated no significant difference in GSTM1 null genotype frequencies between groups, whereas the GSTT1 null genotype was significantly more prevalent in the control group, suggesting a protective effect against endometriosis development. This paper is centrally about endometriosis — specifically examining genetic susceptibility factors related to detoxification enzymes in Brazilian women.

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Abstract

PurposeThe glutathione family (GST) genes appear to play a role in the genesis of endometriosis. This case-control study aimed to compare the frequencies of GSTM1 and GSTT1 polymorphisms in women with endometriosis and women without endometriosis.MethodsPolymerase chain reaction was performed to analyze the GSTM1 and GSTT1 genotypes among women with surgically and histologically confirmed endometriosis (case group n = 121) and in women without evidence of endometriosis confirmed by laparoscopy for investigation the infertility or for laparoscopic tubal sterilization (control group n = 97).Result(s)No differences in the frequencies of GSTM1 polymorphism (null genotype) were observed between the cases and controls: odds ratio (OR) = 1.13; 95 % CI 0.656-1.93 (p = 0.659). The GSTT1 polymorphism (null genotype) was more prevalent in the endometriosis group than in the control group (OR = 0.53; 95 % CI 0.94-0.29 (p = 0.039). No relationship between menstrual cycle interval and GSTM1 null genotype frequency was observed in either cases or controls (p = 0.370 and p = 0.664, respectively). In addition, no relationship between menstrual cycle interval and GSTT1 null genotype was observed in cases (p = 0.797) or controls (p = 0.052).ConclusionsGSTM1 null genotype frequency was similar between cases and controls. The GSTT1 null genotype was more frequent in the control group.
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Abstract

Purpose The glutathione family (GST) genes appear to play a role in the genesis of endometriosis. This case–control study aimed to compare the frequencies of GSTM1 and GSTT1 polymorphisms in women with endometriosis and women without endometriosis.

Methods

Polymerase chain reaction was performed to analyze the GSTM1 and GSTT1 genotypes among women with surgically and histologically confirmed endometriosis (case group n = 121) and in women without evidence of endometriosis confirmed by laparoscopy for investigation the infertility or for laparoscopic tubal sterilization (control group n = 97). Result(s) No differences in the frequencies of GSTM1 polymorphism (null genotype) were observed between the cases and controls: odds ratio (OR) = 1.13; 95 % CI 0.656–1.93 (p = 0.659). The GSTT1 polymorphism (null genotype) was more prevalent in the endometriosis group than in the control group (OR = 0.53; 95 % CI 0.94–0.29 (p = 0.039). No relationship between menstrual cycle interval and GSTM1 null genotype frequency was observed in either cases or controls (p = 0.370 and p = 0.664, respectively). In addition, no relationship between menstrual cycle interval and GSTT1 null genotype was observed in cases (p = 0.797) or controls (p = 0.052).

Conclusions

GSTM1 null genotype frequency was similar between cases and controls. The GSTT1 null genotype was more frequent in the control group. Similar content being viewed by others Abbreviations - CEP-HUJM: - Research Ethics Committee—Julio Muller Hospital University - DNA: - Deoxyribonucleic acid - GSH: - Glutathione - GSTM1: - Gene mu (μ) 1 the glutathione S-transferase system - GSTT1: - Gene theta (θ) 1 the glutathione S-transferase system - BMI: - Body mass index - bp: - Base pairs - PCR: - Polymerase chain reaction - UFMT: - Federal University of Mato Grosso - USA: - United States of America

References

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Glutathione S-transferase M1 and T1 gene polymorphisms in Brazilian women with endometriosis. J Assist Reprod Genet 32, 1531–1535 (2015). https://doi.org/10.1007/s10815-015-0554-7 Received: Accepted: Published: Issue date: DOI: https://doi.org/10.1007/s10815-015-0554-7

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endometriosis

MeSH descriptors

Endometriosis Glutathione Transferase Polymorphism, Genetic Adult Brazil Case-Control Studies Endometriosis Female Gene Frequency Genetic Predisposition to Disease Glutathione Transferase Humans Menstrual Cycle Menstrual Cycle

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