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
Citations
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Journal ArticleDOI
Changes in steroidogenic enzyme and steroidogenic acute regulatory protein messenger RNAs in ovarian follicles during ovarian development of rainbow trout (Oncorhynchus mykiss)
Ikumi Nakamura,Jennifer C. Evans,Makoto Kusakabe,Makoto Kusakabe,Yoshitaka Nagahama,Graham Young,Graham Young,Graham Young +7 more
TL;DR: The acquisition of the ability of later stage follicles to rapidly produce large quantities of 17,20beta-P appears to be supported by a preparatory increase in mRNAs encoding StAR and other steroidogenic enzymes.
Journal ArticleDOI
Differentiation and development of Leydig cells, and changes of testosterone levels during testicular differentiation in tilapiaOreochromis niloticus.
TL;DR: Initial appearance and development of Leydig cells during testicular differentiation in tilapia,Oreochromis niloticus, were investigated histologically and changes of testosterone levels in gonadal tissue and serum were examined by radioimmunoassay.
Journal ArticleDOI
Changes in serum steroid hormones and steroidogenic ability of ovarian follicles during artificial maturation of cultivated Japanese eel, Anguilla japonica
TL;DR: E2 production by follicles was shown to depend largely on aromatase activity, while T production by hair follicles appeared to be depend partly on SPH-induced pregnenolone production, followed by a further increase or a slight decrease during the migratory nucleus stage.
Journal ArticleDOI
Effect of tributyltin on the development of ovary in female cuvier (Sebastiscus marmoratus)
TL;DR: The result showed that TBT at environmentally realistic concentrations can inhibit the ovarian development in fish, and apoptosis appears to be one mechanism affecting ovarian development.
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Influence of photoperiod on the onset of gonadogenesis in Eurasian perch Perca fluviatilis
TL;DR: This study showed that a 24-h photophase, applied to fish from mid-July to the beginning of October, inhibits the initiation of gametogenesis in perch, whereas a constant photoperiod resulted in a very heterogeneous gonadal development.
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.
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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.