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- W2074228552 abstract "The presence of progesterone receptors (PR) throughout the human term fetoplacental vascular tree was investigated. By reverse transcription-polymerase chain reaction (RT-PCR), we showed expression of PR mRNAs in stem villi vessels, chorionic arteries and veins, and umbilical arteries and veins. Binding studies and Scatchard analysis revealed a single class of high-affinity binding sites for (3)H-R5020 (promegestone) in cytosolic extracts of all placental vessels, with K(d) values in the range of 2.5-4 nM. High levels of PR were detected in placental vessels compared to other vascular tissues. Thus, maximum binding capacities of stem villi vessels, chorionic arteries and veins, and umbilical arteries and veins were 247 +/- 25, 377 +/- 58, 295 +/- 40, 371 +/- 118, and 672 +/- 144 fmol/mg protein, respectively. Endothelial cell elimination in chorionic arteries did not significantly modify the number of PR. RT-PCR and binding studies also assessed PR expression in cultured placental vascular smooth muscle cells isolated from stem villi vessels. All these data suggested that most of the PR of fetoplacental vessels were from the media. In conclusion, we report here the first evidence of the presence of PR in the muscular layer of human term fetoplacental vessels. This finding, together with the high progesterone concentrations in cord blood, suggests that the interactions between the PR and its ligand may play a role in the physiology and physiopathology of human fetoplacental vascularization." @default.
- W2074228552 created "2016-06-24" @default.
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- W2074228552 date "2000-03-01" @default.
- W2074228552 modified "2023-10-01" @default.
- W2074228552 title "Evidence for Progesterone Receptors in the Human Fetoplacental Vascular Tree1" @default.
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- W2074228552 doi "https://doi.org/10.1095/biolreprod62.3.759" @default.
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