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| Bizzott,Paula M.; Godinho,Hugo P.. |
| The Erythrinidae trahira, Hoplias malabaricus (Bloch, 1794), is widespread throughout South America river basins. We determined Sertoli cell supporting capacity (ratio of primary spermatocytes: Sertoli cells and spermatids: Sertoli cells), meiotic index (ratio of spermatids: primary spermatocytes) and the number of spermatogonial mitotic generations of this fish. The fish were captured in the Igarapava reservoir, Grande River, Alto Paraná River basin, Brazil. Testis fragments of three sexually mature trahiras were fixed in 5% buffered glutaraldehyde solution and embedded in glycol methacrylate. Serial sections of 2 and 3 µm in thickness were stained with 0.5% toluidine blue. Histological counts from cysts of primary spermatocytes and spermatids revealed,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sertoli cell; Spermatogonial generations; Teleost testis morphometry. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000300003 |
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| 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 |
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| Silva Junior, Valdemiro Amaro da; Universidade Federal Rural de Pernambuco; Monteiro Filho, Waldo Oliveira; Universidade Federal Rural de Pernambuco; Pinto, Catarina Ferreira; Universidade Federal Rural de Pernambuco; Torres, Sandra Maria de; Universidade Federal Rural de Pernambuco; Tenorio, Bruno Mendes; Universidade Federal Rural de Pernambuco. |
| In current assay the serotoninergic system in newly-born Wistar rats underwent pharmacological modification by fluoxetine, a selective serotonin reuptake inhibitor (SSRI), to investigate its repercussion on testicular parameters in adult animals. Thirty animals were distributed according to treatment: control animals (n = 6), animals treated with 1 mg kg-1 (n = 6), 5 mg kg-1 (n = 6), 10 mg kg-1 (n = 6) and 20 mg kg-1 (n = 6) of fluoxetine (IP). When 150 days old, the animals were anesthetized and perfused intra-cardiacally with fixative solution. Testes were routinely processed for inclusion in plastic resin (methacrylate glycol). Further, 4 µm-thick histological sections were stained with toluidine blue/sodium borate 1% and analyzed histometrically.... |
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Palavras-chave: 2.06.00.00-3 spermatogenesis; Sertoli cell; Sperm production; Fluoxetine chlorohydrate Morfologia. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10946 |
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