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Xeno-oestrogens and phyto-oestrogens induce the synthesis of leukaemia inhibitory factor by human and bovine oviduct cells

Reinhart, Karin C. ; Dubey, Raghvendra K. ; Keller, Paul J. ; Lauper, Urs ; Rosselli, Marinella

In: Molecular Human Reproduction, 1999, vol. 5, no. 10, p. 899-907

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    Title
    • Xeno-oestrogens and phyto-oestrogens induce the synthesis of leukaemia inhibitory factor by human and bovine oviduct cells
    Author
    • Reinhart, Karin C.. Department of Obstetrics and Gynaecology, Clinic for Endocrinology, University Hospital, 8091 Zurich, Switzerland and
    • Dubey, Raghvendra K.. Department of Obstetrics and Gynaecology, Clinic for Endocrinology, University Hospital, 8091 Zurich, Switzerland and
    • Keller, Paul J.. Department of Obstetrics and Gynaecology, Clinic for Endocrinology, University Hospital, 8091 Zurich, Switzerland and
    • Lauper, Urs. Department of Obstetrics and Gynaecology, Clinic for Endocrinology, University Hospital, 8091 Zurich, Switzerland and
    • Rosselli, Marinella. Department of Obstetrics and Gynaecology, Clinic for Endocrinology, University Hospital, 8091 Zurich, Switzerland and
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Molecular Human Reproduction, 1999, vol. 5, no. 10, p. 899-907. Oxford University Press
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:296948
    Summary
    In bovine oviduct cells 17β-oestradiol can induce the synthesis of leukaemia inhibitory factor (LIF), a glycoprotein essential for embryo implantation. Therefore substances which are structurally similar to 17β-oestradiol and possess oestrogenic activity may also modulate LIF synthesis and influence the reproductive process. We used primary cultures of bovine and human oviduct cells (epithelial cells:fibroblasts 1:1) to compare the effects of 17β-oestradiol, phyto-oestrogens (genistein, biochanin A, daidzein, formononetin, and equol) and xeno-oestrogens [polychlorinated biphenyls (PCB): trichlorobiphenyl, 4-hydroxy-trichlorobiphenyl and 4-hydroxy-dichlorobiphenyl] on LIF synthesis. Immunoreactive LIF-enzyme-linked immunosorbent assay was used to determine the concentration of LIF in the culture medium. Similar to 17β-oestradiol, genistein (0.02-2 μmol/l) induced LIF synthesis in bovine oviduct cells in a concentration-dependent manner. Equol, biochanin A and daidzein (2 μmol/l), 4-hydroxy-trichlorobiphenyl and 4-hydroxy-dichlorobiphenyl (0.01-10 μmol/l) but not formononetin (2 μmol/l) also induced LIF synthesis in bovine cells. Phyto-oestrogens and xeno-oestrogens also induced LIF synthesis in human oviduct cells (P < 0.05). The stimulatory effects of PCB, phyto-oestrogens and 17β-oestradiol were blocked by ICI 182,780 (1 μmol/l). Moreover, 17β-oestradiol, 4-hydroxy-trichlorobiphenyl, 4-hydroxy-dichlorobiphenyl, genistein, tamoxifen and ICI 182,780 displaced [3H]17β-oestradiol from cytosolic oestrogen receptors in bovine oviduct cells. These results suggest that phyto-oestrogens and PCB mimic the effects of oestradiol in inducing LIF synthesis by bovine and human oviduct cells and that these stimulatory effects are oestrogen receptor-mediated. Environmental oestrogens act as endocrine modulators/disrupters and may induce deleterious effects on the reproductive process by influencing LIF synthesis in a non-cyclic fashion leading to tubal infertility