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- W2029294144 abstract "An increasing body of information now suggests the existence of a complete intraovarian IL-1 system replete with ligands, receptor, and receptor antagonist. Since IL-1 is an established mediator of inflammation and since ovulation may constitute an inflammatory-like reaction, consideration may be given to the possibility that IL-1 may play an intermediary role in the ovulatory process. To further assess the above hypothesis, we have set out to determine whether IL-1 is capable of promoting ovarian prostaglandin biosynthesis, an established component of the ovulatory cascade. Cultured whole ovarian dispersates from immature (25 day old) rats constitutively elaborated major prostaglandin species (PGE2 greater than PGF2 alpha) in a cell density-dependent fashion. Treatment with IL-1 produced dose-dependent increments in prostaglandin (PGE2 greater than PGF2 alpha) accumulation as compared with untreated controls. Comparable cellular densities of untreated or IL-1 beta-treated whole ovarian dispersates elaborated substantially more PGE2 as compared with isolated granulosa or theca-interstitial cell preparations suggesting a requirement for cell-cell interaction. Indeed, cell contact-dependent reconstitution experiments involving isolated granulosa and theca-interstitial cells at a projected physiologic ratio of 4:1 revealed synergistic interactions in the elaboration of PGE2 under both basal and IL-1 beta-treated circumstances. Identical results were obtained for cell contact-independent heterologous (but not homologous) coculture experiments. Taken together, our present findings reveal optimal basal and IL-1-stimulated ovarian prostaglandin (PGE2 greater than PGF2 alpha) biosynthesis to require heterologous, contact-independent, presumably humorally-mediated, cell-cell interaction. These observations along with the demonstration of the gonadotropin-dependent preovulatory induction of ovarian IL-1 beta gene expression provide strong support for the view that IL-1 may be the centerpiece of an intraovarian regulatory loop concerned with the promotion of the preovulatory cascade." @default.
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- W2029294144 date "1992-05-01" @default.
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- W2029294144 title "Interleukin-1 stimulates ovarian prostaglandin biosynthesis: evidence for heterologous contact-independent cell-cell interaction." @default.
- W2029294144 doi "https://doi.org/10.1210/endo.130.5.1572315" @default.
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