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Proliferation of guinea-pig uterine epithelial cells in serum-free culture conditions: effect of 17 beta-estradiol, epidermal growth factor and insulin



Proliferation of guinea-pig uterine epithelial cells in serum-free culture conditions: effect of 17 beta-estradiol, epidermal growth factor and insulin



Journal of Steroid Biochemistry and Molecular Biology 38(3): 345-350



The effects of 17 beta-estradiol (E2), epidermal growth factor (EGF) and insulin, alone or in association on guinea-pig uterine epithelial cell proliferation were examined in serum-free culture conditions. Primary cultures of epithelial cells were made quiescent by serum depletion, then incubated in a chemically defined medium. In this medium, insulin increased DNA synthesis but not in a dose-dependent manner for concentrations ranging from 0.2 to 10 micrograms/ml. A significant effect of EGF was found only for the highest concentration tested (100 ng/ml). E2 alone or in the presence of insulin (1 microgram/ml) had no effect whatsoever on the concentration tested (10(-10)-10(-5)M). Insulin (10 micrograms/ml) plus EGF (100 ng/ml) exerted on DNA synthesis and cell proliferation a significant additive effect which was identical to the growth stimulation induced by 10% fetal calf serum. The effects of insulin plus EGF were not modified by the addition of E2. These findings suggest that E2 is not directly mitogenic for uterine epithelial cells in defined culture conditions and that the mitogenic response to optimal concentration of insulin plus EGF is independent of E2.

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Accession: 041094327

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PMID: 2009226


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