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• W2103752783 abstract "Increased prostaglandin H synthase-2 (PGHS-2) expression in the amnion is critical for the production of prostaglandins that induce labour. The aim of the present investigation was to determine whether PGHS-2 gene activity is controlled by NFkappaB transcription factors in term amnion in vivo as suggested by in vitro findings. Amnion membranes were collected after elective Caesarean section (n = 14) or spontaneous labour (n = 12) at term, and histone acetylation and transcription factor binding to the PGHS-2 and IkappaBalpha promoters were determined in fresh tissues by chromatin immunoprecipitation. High level of histone-3 and -4 acetylation was detected in the proximal 1000 bp region of the PGHS-2 promoter indicating permissive chromatin structure in an area that contains two consensus NFkappaB binding sites and other transcription factor binding motifs. The TATA-box was occupied by TATA-binding protein (TBP) demonstrating that the PGHS-2 gene was transcriptionally active before and after labour. NFkappaB (p65 and p50) binding to the consensus sites, however, was detected only before, but not after, labour. Moreover, NFkappaB factor binding before labour was unrelated to TBP binding to the PGHS-2 TATA-box in the same tissues. Further, p65 binding to the NFkappaB-responsive IkappaBalpha promoter increased at labour and correlated strongly with TBP binding to the TATA-box of this gene. We conclude that the proximal 1000 bp region is involved in PGHS-2 promoter regulation in term amnion. The NFkappaB system is activated at labour and stimulates the IkappaBalpha gene, but the NFkappaB factors do not drive PGHS-2 transcription using consensus promoter sites in normal term amnion in vivo." @default.
• W2103752783 created "2016-06-24" @default.
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• W2103752783 date "2008-01-01" @default.
• W2103752783 modified "2023-10-16" @default.
• W2103752783 title "Prostaglandin H synthase-2 gene regulation in the amnion at labour: histone acetylation and nuclear factor kappa B binding to the promoter in vivo" @default.
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• W2103752783 doi "https://doi.org/10.1093/molehr/gam086" @default.
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