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Estrogen and progesterone receptor expression in macrophages and regulation of hepatocyte growth factor by ovarian steroids in women with endometriosis

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Title: Estrogen and progesterone receptor expression in macrophages and regulation of hepatocyte growth factor by ovarian steroids in women with endometriosis
Authors: Khan, Khaleque Newaz / Masuzaki, Hideaki / Fujishita, Akira / Kitajima, Michio / Sekine, Ichiro / Matsuyama, Toshifumi / Ishimaru, Tadayuki
Issue Date: Jul-2005
Publisher: Oxford University Press
Citation: Human Reproduction, 20(7), pp.2004-2013; 2005
Abstract: Background: Information regarding macrophage-mediated regulation of hepatocyte growth factor (HGF) by ovarian steroid hormones in women with endometriosis is limited. Therefore, we investigated the regulation of HGF by steroid hormones in isolated macrophages and stromal cells derived from women with or without endometriosis. Methods: We isolated CD68 immunoreactive adherent macrophages in vitro from 46 women with endometriosis and 30 women without endometriosis. Estrogen receptor (ER) and progesterone receptor (PR) expression in macrophages was demonstrated by immunohistochemistry and RT-PCR. Production of HGF in the culture media of basal and ovarian steroid-stimulated macrophages was examined by enzyme-linked immunosorbent assay. Expression of mRNA for HGF and its receptor, c-Met in macrophages and stromal cells in response to ovarian steroid was investigated by RT-PCR. The single and combined effect of HGF and estrogen on the growth of macrophages and stromal cells was analysed by bromodeoxyuridine (BrdU) incorporation. Results: ER and PR were expressed in isolated macrophages and intact tissue at the protein and mRNA levels. Macrophages derived from women with endometriosis produced significantly higher concentration of HGF (352.2 ± 4.9 pg/ml) in conditioned media after treatment with estradiol (10-8 mol/l) than that of basal macrophages (221.5 ± 32.8 pg/ml, P < 0.05) or women without endometriosis (170.6 ± 2.6 pg/ml, P < 0.05). These effects were less evident after treatment with progesterone. Treatment with tamoxifen (10-6 mol/l) reversed the production of HGF and other macromolecules. Secretion of HGF in response to ovarian steroids was further enhanced after activation with lipopolysaccharide. The mRNA expressions of HGF and its receptor, c-Met, were also detected in macrophages and stroma in response to estrogen, suggesting an autocrine regulation. HGF mRNA expression was higher in cells of women with endometriosis than non-endometriosis women. Bromodeoxyuridine incorporation indicated that exogenous stimulation with HGF and estrogen, either alone or in combination, significantly increased the cell proliferation of both endometrial stroma and macrophages compared to that of non-endometriosis or non-treated cells. Conclusion: These results suggest that besides other inflammatory mediators, ovarian steroids also participate in the production of HGF by peritoneal macrophages which may be involved in the growth of endometriosis either alone or in combination with estrogen.
Keywords: Endometriosis / Estrogen receptor / Hepatocyte growth factor / Ovarian steroids / Progesterone receptor
URI: http://hdl.handle.net/10069/34523
ISSN: 02681161
DOI: 10.1093/humrep/deh897
Rights: © The Author 2005. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved. / This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Human Reproduction following peer review. The definitive publisher-authenticated version Human Reproduction, 20(7), pp.2004-2013; 2005 is available online at: http://dx.doi.org/10.1093/humrep/deh897
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/34523

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