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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Variations in plasma sex steroid hormones of the wild caspian cyprinid fish, kutum (rutilus frisii kutum)
TL;DR: The results showed that plasma steroid levels in females manifested in two phases in annual reproductive cycle; the resting phase being characterized with the lowest level of steroid hormones and the peak reproduction activity phase with simultaneously a significant increase in level of E2, P and T in plasma.
Journal ArticleDOI
Sex steroid levels in females and males of Brycon orbignyanus throughout different juvenile and adult ages and during induction hormone in the mature females
Daniel Antonio Rotili,Darci Carlos Fornari,Éverton Luís Zardo,Juan R. Esquivel-Muelbert,Marcelo Bernardi,Diógenes Henrique de Siqueira-Silva,Danilo Pedro Streit +6 more
TL;DR: In this article, the plasma levels of the major sex steroids, 17β-estradiol (E2), 17α-hydroxyprogesterone (17α-OHP), testosterone (T) and 11-ketotestosterone (11-KT), in males and females of Brycon orbignyanus of different ages, juveniles with 12 and 24 months and adults with 48 months, were collected, identified through the sexual dimorphism of the species.
Journal ArticleDOI
In vitro modulation by steroids and growth hormone of the specific binding of gonadotropin II in rainbow trout (Oncorhynchus mykiss) follicular layers
Hélène Quesnel,Bernard Breton +1 more
TL;DR: GTH II binding on thecal tissues may be modulated in vitro by steroids, especially testosterone, and by GH, which act through synergism with GtH II.
Journal ArticleDOI
Sex steroid levels in females and males of Brycon orbignyanus throughout different juvenile and adult ages and during induction hormone in the mature females
TL;DR: In this article , the levels of reproductive hormones for fish stocked in fish farming ponds can be varying with respect to age and sex, and the plasma levels of the major sex steroids, 17β-estradiol (E2), 17α-hydroxyprogesterone (17α-OHP), testosterone (T) and 11-ketotestosterone (11-KT), in males and females of Brycon orbignyanus of different ages, juveniles with 12 and 24 months and adults with 48 months, were collected, identified through the sexual dimorphism of the species.
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.