✦ LIBER ✦

On the mechanism of action in gonadotropic stimulation of oocyte maturation inXenopus laevis

✍ Scribed by Merriam, R. W.

Publisher: John Wiley and Sons
Year: 1972
Tongue: English
Weight: 411 KB
Volume: 180
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.1401800313

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✦ Synopsis

Ripe ovarian follicles of Xenopus laeuis, like those of Rana p i p i e n s are capable of responding to gonadotropins even when their peritoneal epithelium and theca are removed by collagenase. Puromycin or cycloheximide stop oocyte maturation whether stimulated by gonadotropins or progesterone in vitro. Actinomycin D does not affect progesterone-induced maturation but does show variable inhibition with gonadotropin-induced maturation. Both gonadotropins and progesterone induce oocyte maturation to germinal vesicle breakdown in the same time. These data are taken as evidence that gonadotropins do not induce a macromolecular synthesis necessary for steroid release but rather simply induce the release of existing steroid in follicular epithelial cells.

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