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In vitro steroid production in the postovulatory follicles of the amago salmon,Oncorhynchus rhodurus, in response to salmon gonadotropin

✍ Scribed by Nagahama, Yoshitaka ;Kagawa, Hirohiko

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
416 KB
Volume
219
Category
Article
ISSN
0022-104X

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✦ Synopsis

Abstract

Partially purified chinook salmon gonadotropin (SG‐G100) was used to investigate estradiol‐17β and progesterone production in vitro in the isolated postovulatory follicles of the amago salmon, Oncorhynchus rhodurus, at varying intervals after ovulation. Chinook salmon gonadotropin stimulated progesterone production in vitro in the young postovulatory follicles, but not in the older ones. In contrast, estradiol‐17β production was not stimulated in either young or older postovulatory follicles. Morphological observations indicate that young postovulatory follicles are more glandular than older ones. Thus, it is concluded that the young postovulatory follicles of the amago salmon are steroidogenic.

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Oocyte maturation in the amago salmon (Oncorhynchus rhodurus): In vitro effects of salmon gonadotropin, steroids, and cyanoketone (an inhibitor of 3β-hydroxy-Δ5-steroid dehydrogenase)
✍ Young, Graham ;Kagawa, Hirohiko ;Nagahama, Yoshitaka 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 874 KB

## Abstract The effect of partially purified chinook salmon gonadotropin (SG‐G100) and a number of steroids on the induction of germinal vesicle breakdown (GVBD) in amago salmon (__Oncorhynchus rhodurus__) oocytes (with intact follicle layers) was investigated in vitro. SG‐G100 was effective only a