Altered gene expression and secretion of interleukin-6 in stromal cells derived from endometriotic tissues

Tsudo T, Toshiyuki Tsudo, T Tsudo, Tasuku Harada, Harada T, T Harada, Tomio Iwabe, Iwabe T, T Iwabe, M Tanikawa, Tanikawa M, Masahiro Tanikawa, Nagano Y, Yorie Nagano, Y Nagano, M Ito, Ito M, Masayuki Itô, Taniguchi F, Fuminori Taniguchi, F Taniguchi, Terakawa N, N Terakawa, Naoki Terakawa
Fertility and sterility · 2000 · vol. 73(2) , pp. 205–211 · doi:10.1016/s0015-0282(99)00496-3 · PMID:10685516 · W2053211648
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Stromal cells from endometriotic tissues show altered gene expression and secrete increased levels of interleukin-6 compared to control cells.

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Abstract

ObjectiveTo compare the expression of interleukin-6 (IL-6) in endometrial and endometriotic cells.DesignProspective study.SettingDepartment of Obstetrics and Gynecology, Tottori University Hospital, Yonago, Japan.Patient(s)Twenty patients who underwent either hysterectomy or laparoscopic surgery.Intervention(s)Endometrial and endometriotic stromal cells were obtained from normal endometrium and from chocolate cyst linings of the ovary. Peritoneal macrophages were isolated from peritoneal fluids. Cells were cultured in the presence or absence of tumor necrosis factor-alpha.Main outcome measure(s)Gene expression of IL-6 was examined by Northern blot analysis. Interleukin-6 protein production was examined by immunocytochemical staining and ELISA.Result(s)A single IL-6 messenger RNA band of approximately 1.3 kilobases was detected in endometriotic stromal cells. Tumor necrosis factor-alpha increased the expression of IL-6 messenger RNA in endometriotic cells in a dose-dependent manner. In endometrial stromal cells, IL-6 messenger RNA signals were much weaker. Endometriotic stromal cells produced significantly larger amounts of IL-6 compared with endometrial stromal cells under basal conditions and after stimulation with tumor necrosis factor-alpha. Interleukin-6 protein was detected in cells isolated from endometriotic tissues by immunocytochemical staining. Interleukin-6 production by cultured macrophages from patients with endometriosis and endometriotic stromal cells was comparable.Conclusion(s)Altered gene expression and protein secretion of IL-6 in patients with endometriosis may contribute to the pathogenesis of the disease and/or to endometriosis-associated infertility.

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Condition tags

endometriosis

MeSH descriptors

Endometriosis Endometriosis Endometrium Interleukin-6 Interleukin-6 Adult Endometriosis Endometriosis Endometrium Endometrium Endometrium Female Gene Expression Regulation Humans Immunohistochemistry Interleukin-6 Leiomyoma Leiomyoma Leiomyoma Macrophages, Peritoneal

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