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- W2885210048 abstract "Progesterone (P4) acting through the P4 receptor (PR) isoforms, PR-A and PR-B, promotes uterine quiescence for most of pregnancy, in part, by inhibiting the response of myometrial cells to pro-labor inflammatory stimuli. This anti-inflammatory effect is inhibited by phosphorylation of PR-A at serine-344 and -345 (pSer344/345-PRA). Activation of the cyclic adenosine monophosphate (cAMP) signaling pathway also promotes uterine quiescence and myometrial relaxation. This study examined the cross-talk between P4/PR and cAMP signaling to exert anti-inflammatory actions and control pSer344/345-PRA generation in myometrial cells. In the hTERT-HMA/B immortalized human myometrial cell line P4 inhibited responsiveness to interleukin (IL)-1β and forskolin (increases cAMP) and 8-Br-cAMP increased this effect in a concentration-dependent and synergistic manner that was mediated by activation of protein kinase A (PKA). Forskolin also inhibited the generation of pSer344/345-PRA and expression of key contraction-associated genes. Generation of pSer344/345-PRA was catalyzed by stress-activated protein kinase/c-Jun NH2-terminal kinase (SAPK/JNK). Forskolin inhibited pSer344/345-PRA generation, in part, by increasing the expression of dual specificity protein phosphatase 1 (DUSP1), a phosphatase that inactivates mitogen-activated protein kinases (MAPKs) including SAPK/JNK. P4/PR and forskolin increased DUSP1 expression. The data suggest that P4/PR promotes uterine quiescence via cross-talk and synergy with cAMP/PKA signaling in myometrial cells that involves DUSP1-mediated inhibition of SAPK/JNK activation." @default.
- W2885210048 created "2018-08-22" @default.
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- W2885210048 date "2019-01-01" @default.
- W2885210048 modified "2023-10-17" @default.
- W2885210048 title "Progesterone and cAMP synergize to inhibit responsiveness of myometrial cells to pro-inflammatory/pro-labor stimuli" @default.
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- W2885210048 doi "https://doi.org/10.1016/j.mce.2018.08.005" @default.
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