Recent Advances in the Morphology, Histochemistry, and Biochemistry of Steroid-Synthesizing Cellular Sites in the Testes of Nonmammalian Vertebrates

Guraya, Sardul S.

doi:10.1016/s0074-7696(08)60087-x

Cited by 37 publications

(16 citation statements)

References 99 publications

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“…Our finding in amago salmon that plasma GTH is highest during spermiation is in agreement with the observations on other salmonid species.3-9) Al though the precise mechanism underlying the ac tion of GTH on spermiation is unknown, it is likely that GTH action is mediated by steroidogenic tissues; steroidogenesis may occur in at least two sites in the teleost testis, the interstitial (Leydig) cells and the Sertoli (lobule boundary) cells. [17][18][19] It is possible that GTH interacts with these cells to stimulate the synthesis and secretion of steroids. In addition to their involvement in spermato genesis, testicular steroids are believed to be in volved in spermiation.…”

Section: Discussionmentioning

confidence: 99%

Some endocrine aspects of precocious sexual maturation in the amago salmon Oncorhynchus rhodurus.

Ueda¹,

Nagahama²,

Tashiro³

et al. 1983

NIPPON SUISAN GAKKAISHI

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Section: Discussionmentioning

confidence: 99%

Some endocrine aspects of precocious sexual maturation in the amago salmon Oncorhynchus rhodurus.

Ueda¹,

Nagahama²,

Tashiro³

et al. 1983

NIPPON SUISAN GAKKAISHI

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“…Progesterone is known to be secreted by postovulatory corpora lutea in tetrapods and elasmobranchs (Xavier and Ozon 1972;Guraya 1976). Although progesterone secretion by teleost postovulatory corpora lutea has not been established, there is good histochemical and ultrastructural evidence of steroidogenic activity in teleost postovulatory corpora lutea (see Introduction).…”

Section: Discussionmentioning

confidence: 99%

Effect of progesterone and estradiol-17β on ovarian fluid secretion in the threespine stickleback, Gasterosteus aculeatus L., form trachurus

Lam¹,

Chan²,

Hoar³

1979

Can. J. Zool.

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Immersion of postspawning sticklebacks in seawater containing 0.5 ppm progesterone for 5 days (medium changed daily) caused marked fluid accumulation in the ovarian cavity. A similar effect was obtained in overripe fish treated in the same way for 9 days; overripe fish have overripe ovulated eggs in the ovarian cavity with very little fluid. Estradiol-17β (1 ppm) also caused ovarian fluid secretion in some postspawning fish, but this may be related to its marked stimulation of ovarian recrudescence. The findings are discussed in relation to the possible role of the postovulatory corpora lutea in ovarian fluid secretion for the maintenance of ovulated eggs.

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“…Although the lobule boundary cells, according to Marshall & Lofts (1956), often occur in testes of fishes not having typical interstitial cells (Leydig cells), ultrastructural observations clearly indicate that there are some species whose testes appear to have both interstitial and lobule boundary cells (Guraya, 1976;Nakagama et al, 1982).…”

Section: Introductionmentioning

confidence: 99%

Morphological changes of Sertoli cells during the male reproductive cycle of the teleost Piaractus mesopotamicus (Holmberg, 1887)

2005

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An investigation of the histological and ultrastructural changes of Sertoli cells during the male reproductive cycle in Piaractus mesopotamicus was made. The results showed that the Sertoli cell development is closely related with germ cell maturation. Therefore, these cells may have some role in germ cell maturation during the reproductive cycle of this species, whether in forming a tissue framework for the developing spermatogenic cysts, aiding in testes reorganization for a new reproductive cycle, in addition to other possible functions discussed in the text.Key words: spermatogenesis, testes, cyst cells, reproduction. RESUMO Mudanças morfológicas nas células de Sertoli durante o ciclo reprodutivo de machos do teleósteo Piaractus mesopotamicus (Holmberg, 1887)Realizou-se uma investigação das mudanças histológicas e ultra-estruturais das células de Sertoli durante o ciclo reprodutivo de machos de Piaractus mesopotamicus. Os resultados mostraram que o desenvolvimento das células de Sertoli está estritamente relacionado à maturação das células gaméticas. Portanto, as células de Sertoli têm algum papel na maturação das células germinativas durante o ciclo reprodutivo dessa espécie, talvez formando um tecido de sustentação para os cistos espermatogênicos em desenvolvimento, ajudando a reorganização testicular para um novo ciclo reprodutivo, além de outras possíveis funções discutidas no texto.Palavras-chave: spermatogênese, testículos, células do cisto, reprodução.

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Recent Advances in the Morphology, Histochemistry, and Biochemistry of Steroid-Synthesizing Cellular Sites in the Testes of Nonmammalian Vertebrates

Cited by 37 publications

References 99 publications

Some endocrine aspects of precocious sexual maturation in the amago salmon Oncorhynchus rhodurus.

Some endocrine aspects of precocious sexual maturation in the amago salmon Oncorhynchus rhodurus.

Effect of progesterone and estradiol-17β on ovarian fluid secretion in the threespine stickleback, Gasterosteus aculeatus L., form trachurus

Morphological changes of Sertoli cells during the male reproductive cycle of the teleost Piaractus mesopotamicus (Holmberg, 1887)

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