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Modulation of human cytotrophoblastic leptin secretion by interleukin-1alpha and 17beta-oestradiol and its effect on HCG secretion

Authors
Cameo, P
Islami, D
Published in Molecular Human Reproduction. 1999, vol. 5, no. 11, p. 1077-82
Abstract To investigate the role of leptin during pregnancy, we assessed leptin production by pure cultured human cytotrophoblastic cells (CTB), its regulation by cytokines and 17beta-oestradiol and its effects on human chorionic gonadotrophin (HCG) secretion. Purified CTB from first trimester placenta were incubated in duplicates in the presence or absence of cytokines or 17beta-oestradiol. Medium was harvested on day 2 and the culture stopped on day 4. Results were corrected for protein content of each individual well and expressed as percent of controls per day (mean +/- SEM). Basal CTB leptin production was 25.2 +/- 2.6 (ng/mg prot). In comparison with controls, leptin production was stimulated to 320 +/- 16% (P < 0.0001) and 195 +/- 3.2% (P < 0.0004) by 3 and 10 ng/ml of interleukin-1alpha respectively. 17beta-oestradiol 10(-6) to 10(-9) mol/l increased basal leptin production 5-9-fold, while 10(-5) mol/l had no such effect. Basal CTB HCG secretion was 5722 +/- 1055 (mIU/mg prot). There was a dose-dependent leptin-induced increase in HCG secretion (P = 0.0039) reaching a 5-fold increase with a leptin concentration of 1 microg/ml (P < 0.006). Gonadotrophin-releasing hormone (GnRH) 8.5 x 10(-8) mol/l significantly increased HCG secretion to 140 +/- 21% of controls (P = 0.031). Cetrorelix (0.1 microg/ml) inhibited leptin-induced HCG secretion (P = 0.0028).
Keywords Cells, CulturedChorionic Gonadotropin/secretionEstradiol/metabolismFemaleGonadotropin-Releasing Hormone/antagonists & inhibitors/metabolismHumansInterleukin-1/metabolismLeptin/metabolism/secretionPregnancyRecombinant Proteins/metabolism/secretionTrophoblasts/metabolism/secretion
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PMID: 10541571
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CHARDONNENS, Didier et al. Modulation of human cytotrophoblastic leptin secretion by interleukin-1alpha and 17beta-oestradiol and its effect on HCG secretion. In: Molecular Human Reproduction, 1999, vol. 5, n° 11, p. 1077-82. https://archive-ouverte.unige.ch/unige:74315

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Deposited on : 2015-07-27

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