|
|
|
|
|
| Silva,Doris; Lizama,Carlos; Tapia,Verónica; Moreno,Ricardo D. |
| Mammalian germ cell apoptosis plays a key role in controlling the correct number of germ cells supported by Sertoli cells during the first wave of spermatogenesis in mammalian puberty. However, little is known about hormonal factors that could influence the rate of germ cell apoptosis during puberty or adulthood. In this work we evaluate germ cell apoptosis under hypothyroidism induced by goitrogen propylthiouracil (PTU) during the first wave of spermatogenesis. Neonatally administered PTU promoted a delay in the differentiation of Sertoli cells as evaluated by the expression of clusterin using immunohistochemistry and RT-PCR. Clusterin had different expression levels in control and PTU-treated animals, but under both conditions the highest levels were... |
| Tipo: Journal article |
Palavras-chave: Testis; Spermatocyte; Sertoli cell; Caspase; Apoptosis; Thyroid. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000200010 |
| |
|
|
| Araújo,Francisco G.; Nascimento,Aparecida A.; Gomes,Iracema D.; Sales,Armando; Oliveira,Beatriz A. Chagas de. |
| ABSTRACT The gonadal development of the characin Astyanax aff. bimaculatus from Funil Reservoir, an impoundment in the middle reaches of the Paraiba do Sul River in southeastern Brazil was analysed through histological, histochemical and histometric techniques, and the spawning season was determined. Unbalanced sex ratio was found, with females outnumbering and reaching larger sizes than males. The following stages of oogenic cell development were identified for females: primary growth, pre-vitellogenic (cortical alveolar) and vitellogenic. In males, the following stages were determined: spermatogonia primary and secondary, spermatocyte primary and secondary, spermatid and spermatozoa. The spawning occurs most of the year, peaking in January-February, as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Freshwater fish; Histology; Oocyte; Spawning type; Spermatocyte. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100326 |
| |
|
|
|
