1. bookAHEAD OF PRINT
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eISSN
2300-8733
First Published
25 Nov 2011
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4 times per year
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English
access type Open Access

The effect of prostaglandins E2 and F2α on orexin system expression in the porcine uterus during the peri-implantation period

Published Online: 02 May 2022
Volume & Issue: AHEAD OF PRINT
Page range: -
Received: 21 Apr 2021
Accepted: 27 Jan 2022
Journal Details
License
Format
Journal
eISSN
2300-8733
First Published
25 Nov 2011
Publication timeframe
4 times per year
Languages
English
Abstract

The aim of this study was to evaluate the effect of prostaglandins E2 (PGE2) and F (PGF) on orexins (OXA and OXB) secretion (ELISA), prepro-orexin (PPO) gene expression and the content of orexin receptors (OX1R, OX2R) mRNA (qPCR) and proteins (Western blot) in porcine endometrial and myometrial tissue slices during early pregnancy (days 10–28) and on days 10–11 of the oestrous cycle. On days 10–11 of pregnancy, prostaglandins (PGs) decreased the expression of the PPO gene and OXR gene and protein in the endometrium. On days 12– 13, PGs increased OXB secretion, PGE2 enhanced OXA secretion, and PGF suppressed PPO expression. On days 15–16, both PGs inhibited PPO expression and OXB secretion, and PGF increased OXA release. On days 27–28, PGs decreased PPO mRNA and OX1R protein levels, PGE2 decreased OX2R protein content, and PGF decreased OXB secretion. On days 10-11 of the cycle PGs increased the expression of PPO mRNA and OX2R protein, whereas PGE2 increased OX1R protein content. The effect of PGs on orexin system expression in the porcine myometrium was dependent on the animal physiological status and the concentrations of specific PGs. The study demonstrated that PGs exert regulatory effects on orexin system expression in the porcine uterus, which suggests that a local regulatory mechanism could be responsible for modulating uterine metabolism. The observed differences in PGs’ influence on orexin system expression could be attributed to changes in the sensitivity of the studied tissues, associated with the phase of the oestrous cycle, the stage of early pregnancy or PGs concentration.

Keywords

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