Association of interleukin 1beta gene (+3953) polymorphism and severity of endometriosis in Turkish women

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This study investigated the association between the IL-1beta (+3953) polymorphism and endometriosis severity in Turkish women but found no statistically significant links.

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This study investigated whether the interleukin-1β (IL-1β) gene (+3953) polymorphism is associated with endometriosis risk and disease severity in 118 Turkish women, with endometriosis diagnosis made by laparoscopy and staging by the Revised American Fertility Society classification. Using PCR-RFLP and gel electrophoresis to determine IL-1β (+3953) genotypes, the authors found a higher frequency of the TT genotype among cases (2.22-fold increase) and an increased frequency of the T allele, but neither difference reached statistical significance (P > 0.05). When stratifying by stage, TT genotype frequency was higher in stage IV than in earlier stages, yet this stage-related increase was also statistically insignificant (P > 0.05). The paper concludes that IL-1β (+3953) polymorphism is not associated with endometriosis in Turkish women. This paper is centrally about endometriosis — it tests the IL-1β (+3953) genetic variant for association with endometriosis severity in Turkish women.

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Abstract

Endometriosis is regarded as a complex trait, in which genetic and environmental factors contribute to the disease phenotype. We investigated whether the interleukin (IL) 1beta (+3953) polymorphism is associated with the severity of endometriosis. Diagnosis of endometriosis was made on the basis of laparoscopic findings. Stage of endometriosis was determined according to the Revised American Fertility Society classification. 118 women were enrolled in the study. 78 women didnot have endometriosis, 6 women had stage I, 3 had stage II, 13 had stage III and 18 had stage IV endometriosis. Polymerase Chain Reaction (PCR), Restriction Fragment Length Polymorphism (RFLP), and agarose gel electrophoresis techniques were used to determine the IL 1beta (+3953) genotype. Frequencies of the IL-1beta (+3953) genotypes in the control group were: CC, 0.397; TT, 0.115; CT, 0.487. Frequencies of the IL-1beta (+3953) genotypes in cases were: CC, 0.375; TT, 0.225; CT, 0.400. We found a 2.22 fold increase in TT genotype in the endometriosis group. However, the difference was not statistically significant (P > 0.05). We also observed an increase in the frequency of IL-1beta (+3953) T allele in the endometriosis group. However, the difference was not statistically significant. We also investigated the association between IL-1beta (+3953) polymorphism and the severity of endometriosis. The frequencies of CC+CT genotypes in stage I, III and IV endometriosis patients were 83.3, 84/6 and 72.2%, respectively; and TT genotypes were 16.7, 15.4 and 27.8%, respectively. We observed a statistically insignificant increase in TT genotype in stage IV endometriosis (P > 0.05). We suggest that IL-1beta (+3953) polymorphism is not associated with endometriosis in Turkish women. Similar content being viewed by others

References

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endometriosis

MeSH descriptors

Endometriosis Endometriosis Genetic Predisposition to Disease Interleukin-1beta Polymorphism, Single Nucleotide Case-Control Studies Endometriosis Female Gene Frequency Gene Frequency Humans Interleukin-1beta Polymorphism, Single Nucleotide Turkey

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