Steroid production by amago salmon (Oncorhynchus rhodurus) testes at different development stages.
Oogenesis in the Medaka Oryzias latipes : Stages of Oocyte Development : Developmental Biology
Etude des caracteristiques des follicules vivants et fixes, par microscopie optique et microscopie electronique en vue d'etablir une table standard des stades de developpement d'ovocytes d'O. latipes…
Isolation and characterization of goldfish cdk2, a cognate variant of the cell cycle regulator cdc2.
Rainbow trout cytochrome P‐450c17 (17α‐hydroxylase/17,20‐lyase) cDNA cloning, enzymatic properties and temporal pattern of ovarian P‐450c17 mRNA expression during oogenesis
Rainbow trout ovarian cholesterol side‐chain cleavage cytochrome P450 (P450scc)
Induction and inhibition of in vitro oocyte maturation and production of steroids in fish follicles by forskolin.
- T. Iwamatsu, S. Takahashi, N. Sakai, Y. Nagahama, K. Onitake
- BiologyThe Journal of experimental zoology
Data indicate that in Oryzias latipes, FK induces oocyte maturation by stimulating follicular production of maturation-inducing steroid (MIS), probably 17 alpha,20 beta-diOH prog, via an increase in cAMP, and that it may inhibit oocytematuration by increasing ooplasmic cAMP and some inhibitory interaction between the granulosa cells and the oocyte through intercellular communication.
Steroidogenesis in the Ovarian Follicle of Medaka (Oryzias latipes, a daily spawner) during Oocyte Maturation
The timely synthesis of 17α,20β‐DP in medaka at the onset of oocyte maturation, together with the demonstration that this progestogen is the most potent inducer of oocytes maturation in vitro, provides further evidence that 17 α,20 β‐DP is the naturally occurring maturation‐inducing hormone in the medaka.
Influence of follicular development on steroid production in the medaka (Oryzias latipes) ovarian follicle in response to exogenous substrates.
Oogenesis and Changes in the Levels of Reproductive Hormones in Triploid Female Rainbow Trout
Akihiko Hara,*4 Masafumi Amano,*5,•õ•õ•õ•õ Katsumi Aida,*5 Masaru Nakamura,*6 and Yoshitaka Nagahama*3 *2Shiga Prefectural Samegai Trout Farm , Kaminyu, Maihara, Shiga 521-0033, Japan *3 National…
Ovarian 3 beta-hydroxysteroid dehydrogenase/delta 5-4-isomerase of rainbow trout: its cDNA cloning and properties of the enzyme expressed in a mammalian cell.
- N. Sakai, M. Tanaka, M. Takahashi, S. Fukada, J. Mason, Y. Nagahama
- Biology, Environmental ScienceFEBS Letters
Interestingly, the trout 3 beta-HSD expressed in COS-1 cells exhibited minimal ability to convert pregnenolone to progesterone, and dehydroepiandrosterone was a more favoral substrate of the trout3 beta- HSD than 1- alpha-hydroxypregnanolone.