Hum. Reprod. Advance Access originally published online on September 25, 2006
Human Reproduction 2006 21(12):3054-3058; doi:10.1093/humrep/del225
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Leukaemia inhibitory factor and interleukin 11 levels in uterine flushings of infertile patients with endometriosis
Department of Obstetrics and Gynecology, Division of Reproduction, University of Medical Sciences, Poznan, Poland
1 To whom correspondence should be addressed at: Division of Reproduction, Department of Obstetrics and Gynecology, University of Medical Sciences, 60-535, ul. Polna 32, Poznan, Poland. E-mail: matmikol{at}mail.gpsk.am.poznan.pl
BACKGROUND: Exact aetiology of infertility in stage I/II endometriosis patients is not known. Interleukin 11 (IL-11) and leukaemia-inhibitory factor (LIF) are factors associated with implantation window in human eutopic endometrium. We decided to test whether there is an altered secretion of these factors, which could explain receptivity defect in patients with minimal endometriosis. METHODS: Uterine flushing and endometrial samples were collected 79 days after ovulation (implantation window) from infertile patients with stage I/II endometriosis (n = 14) and fertile, endometriosis-free controls (n = 21). IL-11 and LIF were assessed in uterine flushings in eutopic endometria in all patients by enzyme-linked immunosorbent assay (ELISA). In eutopic endometrium, semiquantitative RTPCR was performed for LIF and IL-11 mRNA expressions. RESULTS: No statistically significant differences were found in uterine flushing in women with and without endometriosis with regard to IL-11 levels (0.0 pg/ml versus 0.0 pg/ml) and LIF (25.53 pg/ml versus 36.26 pg/ml). These results were confirmed by the results of RTPCR, where there were also no differences between studied groups. CONCLUSIONS: There is no receptivity defect with regard to LIF and IL-11 secretions by eutopic endometrium in infertile women with endometriosis.
Key words: endometrial receptivity/endometriosis/IL-11/infertility/LIF
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