Interleukin-6, interleukin-1β, and tumor necrosis factor α in menstrual effluents as biomarkers of chronic endometritis

Cosimo Tortorella, Giuseppina Piazzolla, Maria Matteo, Vincenzo Pinto, Raffaele Tinelli, Carlo Sabbà, Margherita Fanelli, Ettore Cicinelli
In: Fertility and Sterility · 2013 · vol. 101(1) , pp. 242–247 · doi:10.1016/j.fertnstert.2013.09.041 · PMID:24314919 · W2083173439
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This study investigated the presence of interleukin-6, interleukin-1β, and tumor necrosis factor α in menstrual effluents as potential biomarkers for chronic endometritis.

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Abstract

ObjectiveTo assess the relationship between chronic endometritis (CE) and proinflammatory cytokine levels in menstrual effluents and to develop a simple noninvasive test for screening CE.DesignCase-control study.SettingAcademic center.Patient(s)Sixty-four women referred to our center for infertility.Intervention(s)Office hysteroscopy; endometrial biopsy; collection of menstrual blood at subsequent cycle.Main outcome measure(s)Interleukin (IL) 6, IL-1β, and tumor necrosis factor (TNF) α concentrations in menstrual effluents.Result(s)Thirty-six out of 64 infertile women had histologically proven CE. The remaining 28 women were included as controls. IL-6, IL-1β, and TNF-α levels were markedly higher in menstrual effluents of women with CE compared with control subjects. Receiver operating characteristic curve analysis revealed a good CE screening capacity for all of the cytokines. The combined evaluation of either IL-6/TNF-α or IL-6/IL-1β increased the diagnostic capacity of the test, which reached a 100% sensitivity and a negative predictive value of 100 when at least one cytokine was found to exceed its cutoff value; it also reached a 100% specificity and a positive predictive value of 100 in cases of positivity of both cytokines. Logistic regression analysis confirmed the IL-6/TNF-α-based model as a significant predictor of CE.Conclusion(s)Proinflammatory cytokine levels are increased in menstrual effluents of women with CE. A test dosing IL-6 and TNF-α seems to have a high screening capacity for CE.

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