Journal ArticleDOI
Estradiol-17β production in amago salmon (Oncorhynchus rhodurus) ovarian follicles: Role of the thecal and granulosa cells
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TLDR
A two-cell-type model for the production of follicular estrogens, the thecal layer possibly contributing to estradiol-17β production by synthesizing androgens which are transferred to the granulosa layer and aromatized to est radiol- 17β is suggested.About:
This article is published in General and Comparative Endocrinology.The article was published on 1982-08-01. It has received 217 citations till now. The article focuses on the topics: Granulosa cell & Follicular phase.read more
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Sulfation and uptake of the maturation-inducing steroid, 17α,20β-dihydroxy-4-pregnen-3-one by rainbow trout ovarian follicles.
TL;DR: Rainbow trout ovarian follicles were incubated in vitro with tritiated 17,20β-dihydroxy-4-pregnen-3-one to indicate that the processes of sulfation and uptake of [3H]-17,20 β-P were related to each other and led to the hypothesis that, when cold 17, 20β-P is added to the medium, it reduces the proportion of [ 3H], which is sulfated and thus allows more free
Journal ArticleDOI
Membrane receptor cross talk in gonadotropin-, IGF-I-, and insulin-mediated steroidogenesis in fish ovary: An overview.
Dilip Mukherjee,Suravi Majumder,Sujata Roy Moulik,Puja Pal,Shreyasi Gupta,Payel Guha,Dhynendra Kumar +6 more
TL;DR: Investigation on the mechanism of signal transduction regulating fish ovarian steroidogenesis have shown that multiple, apparently independent signalTransduction pathways are needed to convey the message of single hormone or growth factor.
Journal ArticleDOI
Autoradiographic localization of gonadotrophin receptors in ovaries of the common carp, Cyprinus carpio L.
Krzysztof Bieniarz,David E. Kime +1 more
TL;DR: No binding of gonadotrophin was found in previtellogenic oocytes but binding appeared with the first indications of vitellogenesis and the relationship between binding location, steroidogenesis, and oocyte maturation is discussed.
Journal ArticleDOI
Hepatic Estrogen Receptors in the Japanese Eel, Anguilla japonica : Characterization and Changes in Binding Capacity during Artificially-induced Sexual Maturation
TL;DR: The changes in cER levels represent increased hepatic responsiveness to estrogenic stimuli during artificial maturation, and Lack of change in nER levels may be a feature of Artificial maturation compared to sexual maturation in nature.
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Changes in plasma steroid levels during oocyte development in Indian shad, Tenualosa ilisha (Hamilton, 1822): role of gonadotropins on in vitro steroid production and development of oocyte maturational competence.
Kousik Pramanick,Sourav Kundu,Sudipta Paul,Buddhadev Mallick,Sujata Roy Moulik,Puja Pal,Dilip Mukherjee +6 more
TL;DR: In vitro acquisition of in vitro oocyte maturational competence (OMC) was developed by the addition of HCG in culture medium and inhibited LH-induced development of OMC, indicating the requirement of de novo protein synthesis for this process.
References
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Journal ArticleDOI
Ovarian follicular development in the rat: hormone receptor regulation by estradiol follicle stimulating hormone and luteinizing hormone.
J. S. Richards,James J. Ireland,Mrinalini C. Rao,G. A. Bernath,A. R. Midgley,Leo E. Reichert +5 more
TL;DR: The results indicated that follicular development and granulosa cell differentiation are dependent on steroid-protein hormone regulation of hormone specific receptors.
Journal ArticleDOI
Granulosa cell maturation in the rat: increased binding of human chorionic gonadotropin following treatment with follicle-stimulating hormone in vivo.
TL;DR: Results suggest that FSH administered in vivo may act on granulosa cells to induce or activate receptors for I_H (hCG) and 3β-hydroxysteroid dehydrogenase activity as well as stimulate follicle-stimulating hormone in ovarian development.
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Site of production of oestrogen in rat ovary as studied in micro-transplants.
TL;DR: It is concluded that the theca interna gland cells and the interstitial gland cells most probably constitute the oestrogen-producing system in the ovary but that these cells are functionally dependent on the system granulosa-corpus luteum cells.
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Seasonal changes in plasma cortisol, testosterone and oestradiol-17β in the plaice, Pleuronectes platessa L
J.C. Wingfield,A.S. Grimm +1 more
TL;DR: Plasma cortisol levels are at a high during the season of poor feeding when mobilisation of energy reserves is likely to be greatest and steroid concentration in males showed small significant seasonal changes.
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Androgen production by theca and granulosa isolated from proestrous rat follicles.
J. E. Fortune,David T. Armstrong +1 more
TL;DR: It is concluded that the theca is the site of follicular androgen production and that LH regulates androgen secretion by rat ovarian follicles, and provides the androgen precursor needed for follicular estradiol-17beta synthesis.