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- W2788187854 abstract "Estrogen and progesterone are the main pregnancy hormones produced by the placenta. It is well understood that estrogen stimulates angiogenesis in the uterus during the reproductive cycle. Although the estrogen and progesterone signaling pathways are assumed to be associated with placental vascularization and preeclampsia, expression of estrogen receptors (ESRs) and progesterone receptor (PGR) in the placenta have not been well studied. The present study examined the expression patterns of steroid hormone receptors in placentas. Human placenta samples were collected and divided into normal and preeclampsia groups. Results revealed that expression levels of ESR1 were reduced, whereas ESR2 and PGR were elevated in preeclamptic placentas. To generate an in vitro preeclampsia environment, human placenta‑derived BeWo cells were incubated under hypoxic conditions, or treated with catechol‑O‑methyl transferase inhibitor (COMT‑in) or L‑NG‑nitroarginine methyl ester (L‑NAME). Expression levels of ESR1, ESR2 and PGR in hypoxic cells demonstrated similar regulation as those in placentas from women with preeclampsia. Although COMT‑in and L‑NAME did not significantly regulate the expression levels of the receptors, COMT‑in translocated ESR2 and PGR from the nucleus to the cytoplasm, indicating that these receptors were inactivated. These results suggested that ESRs and PGR are associated with symptoms of preeclampsia in the placenta. The expression of ESR1 was reduced in preeclamptic placenta and hypoxic BeWo cells. In addition, the activation of ESR2 and PGR was blocked in placenta cells subjected to COMT‑in treatment. The reduced ESR1 expression and inactivation of ESR2 and PGR proteins may affect the physiological complications of preeclampsia in the placenta." @default.
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- W2788187854 date "2018-02-08" @default.
- W2788187854 modified "2023-09-27" @default.
- W2788187854 title "The expression and activation of sex steroid receptors in the preeclamptic placenta" @default.
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- W2788187854 doi "https://doi.org/10.3892/ijmm.2018.3474" @default.
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