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- W2400564437 abstract "The purpose of this investigation was to study the mechanism of stimulation of PGE2 output from human amnion epithelial cells by the synthetic glucocorticoid dexamethasone. Cells incubated in serum-free pseudo-amniotic fluid produced very low levels of PGE2, even when arachidonic acid (1 microM) was present. Pretreatment of cells with dexamethasone (50 nM) for 21 h increased the PGE2 output 6- to 7-fold in 2-h incubations only in the presence of arachidonic acid. The RNA synthesis inhibitor, actinomycin D (1 microgram/ml), and the protein synthesis inhibitor, cycloheximide (40 micrograms/ml), each blocked dexamethasone-stimulated arachidonic acid conversion to PGE2. The time course of these events suggests that dexamethasone first initiates RNA synthesis. Acetylsalicylic acid, a specific and irreversible blocker of prostaglandin endoperoxide H synthase (cyclooxygenase), was used to determine whether dexamethasone could stimulate new enzyme synthesis. Cells treated first with acetylsalicylic acid (30 min) then dexamethasone (22 h) produced as much PGE2 in response to 1 microM arachidonate as did cells exposed to dexamethasone only. Exposing cells to acetylsalicylic acid after dexamethasone completely eliminated PGE2 output. These data suggest that dexamethasone stimulates the synthesis of prostaglandin endoperoxide H synthase." @default.
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- W2400564437 date "1989-11-01" @default.
- W2400564437 modified "2023-10-17" @default.
- W2400564437 title "Dexamethasone stimulates arachidonic acid conversion to prostaglandin E2 in human amnion cells." @default.
- W2400564437 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/2634066" @default.
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