Polymorphism of the Interleukin-1β Gene and Endometriosis

Abstract

Objective: Experimental data indicate that interleukin (IL)-1 plays a role in the pathogenesis of endometriosis. We determined the genotype and the allele frequencies of the IL1B exon 5 polymorphism and the corresponding IL-1β serum levels in women with endometriosis.

Methods: We genotyped 92 women with surgically and histologically confirmed endometriosis and 69 controls without history of endometriosis. Both groups were of middle Euroepan genetic background for the IL1B exon 5 polymorphism (at position +3954). Genotyping was performed by pyrosequencing. IL-1β serum levels were anlayzed by a commercially available enzyme-linked immunosorbent assay.

Results: Allele frequencies in women with endometriosis and control swere 76.6% and 76.8%, respectively, for the E1 allele (wild type) and 23.4% and 23.2%, respectively, for the E2 allele (polymorphic) (odds ratio 1.01; P > .99). The investigated polymorphism of the IL-1β gene was not correlated with IL-1β serum levels.

Conclusion: We did not find an association between the IL1B exon 5 polymorphism, endometriosis, or increased serum IL-1η levels.

Keywords

Endometriosis polymorphism interleukin-1

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