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- W2008216580 abstract "Ovaries from immature intact rats contain an apparently low molecular weight substance which mimics the action of follitropin (FSH) on ovarian granulosa cells in culture. Similar to FSH action, the ovarian substance (OS) induced cell-shape changes followed by intensive progestin production. Like FSH action, OS-induced steroidogenesis reversibly ceased upon washing the factor from the cultured cells, and could be blocked in the presence of cycloheximide or α-amanitin. Although OS stimulated aromatase activity in granulosa cells, it failed to elicit LH responsiveness in the cultured cells. Androstenedione synergistically augmented OS-induced progestin production and aromatase activity. OS itself synergistically augmented FSH-induced progestin but did not have any effect on FSH-induced aromatase activity. In contrast to FSH action which is mediated via cAMP formation, OS doses which evoked extensive synthesis of progestin products failed to stimulate significant increases in intracellular cAMP accumulation. These results suggest the existence of a putative intraovarian hormone-like substance which can mimic some effects of the gonadotropins on the follicular granulosa cell differentiation and may facilitate FSH action at yet unknown stages of the follicular development." @default.
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- W2008216580 date "1984-06-01" @default.
- W2008216580 modified "2023-09-27" @default.
- W2008216580 title "Low molecular weight substance from rat ovary induces steroidogenesis in cultured granulosa cells" @default.
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- W2008216580 doi "https://doi.org/10.1016/0303-7207(84)90093-5" @default.
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