Leydig Cells
Mostrando 13-24 de 152 artigos, teses e dissertações.
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13. Morphology and dynamics of male gametogenesis in Sympterygia bonapartii (Chondrichthyes, Rajidae) from Northern Patagonia
ABSTRACT The smallnose fanskate, Sympterygia bonapartii Müller & Henle, 1841 is one of the most disembarked items in commercial harbors in Argentina. In this work, the microscopic architecture of mature male gonads and the dynamics of cysts development are analyzed as a contribution to awareness of the reproductive biology of the species. Some biological da
Iheringia, Sér. Zool.. Publicado em: 2015-09
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14. Simultaneous Administration of Dexamethasone and Vitamin E Reversed Experimental Varicocele-induced Impact in testicular tissue in Rats; Correlation with Hsp70-2 Chaperone Expression
ABSTRACTPurpose:This study aimed to investigate the protective effects of isolated and co-administration of vitamin E (VitE) and dexamethasone (DEX) on varicocele (VCL)-induced damages in testicular tissue.Materials and Methods:Wistar rats were divided into five groups (n=6), including; control-sham, non-treated VCL-induced, VitE-treated VCL-induced (VitE, 1
Int. braz j urol.. Publicado em: 2015-08
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15. Urinary Excretion Profile of Luteinizing Hormone in Brazilian Athletes
Luteinizing hormone (LH) can be used by athletes as an alternative way to take illicit advantage of androgenic effects, since it stimulates the secretion of testosterone by the Leydig cells. As consequence, LH use is illegal for male athletes and the hormone is included in the World Anti-Doping Agency (WADA) prohibited list. Since LH is an endogenous subs
J. Braz. Chem. Soc.. Publicado em: 2015-08
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16. Testicular Histomorphometric Evaluation of Zebu Bull Breeds
The objective of this study was to evaluate the quantitative histology and testicular biometrics in zebu bulls of different breeds. Testicular fragments of Nelore (n=10), Polled Nelore (n=6), Gir (n=5), Guzerat (n=5) and Tabapuã bulls (n=5) were used. The fragments were perfusion-fixed in Karnovsky solution, embedded in glycol methacrylate and stained with
Braz. arch. biol. technol.. Publicado em: 2014-12
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17. Morfohistología testicular de Ceratophrys ornata (Bell) (Amphibia, Anura, Ceratophryidae)
This paper describes the morphohistological features of the testes of adult Ceratophrys ornata (Bell, 1843) (n = 5) from a wetland agroecosystem of central Argentina. The testes were processed by routine histological techniques, sectioned at 8 µm. The sheets obtained were stained with hematoxylin-eosin and Masson trichrome. The gonads are paired, yellowish,
Iheringia, Sér. Zool.. Publicado em: 2013-06
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18. Long term evaluation of morphometric and ultrastructural changes of testes of alloxan-induced diabetic rats
PURPOSE: To evaluate in a long term the morphometric and ultrastructural changes in seminiferous tubules (ST) of normal and diabetic rats, and to correlate any changes with animal age and diabetes duration. METHODS: Sixty male Wistar rats, three months-old, were randomly divided into two groups: 30 non-diabetic controls (N) and 30 alloxan untreated diabetic
Acta Cir. Bras.. Publicado em: 2013-04
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19. Preparation of infertile male rabbits by local electron beam irradiation for intratesticular transplantation of autologous bone marrow stem cells
PURPOSE: To explore an efficient and safe protocol for the preparation of infertile male rabbits from which bone marrow stem cells (BMSCs) could be isolated and cultured. METHODS: Autologous BMSCs could be used for intratesticular transplantation and male infertility research. For this model, various doses (e.g., 6, 8, 10, or 12 Gy) of electron beam irradiat
Acta Cir. Bras.. Publicado em: 2013-02
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20. Efeitos do inseticida endossulfam sobre a morfologia e a morfometria testicular em morcegos frugívoros Artibeus lituratus (OLFERS, 1818) / Effects of the endosulfan on the testicular morphology and morphometry in fruit bats Artibeus lituratus (OLFERS, 1818)
Large amounts of agricultural chemicals are discharged into the environment in Brazil. These pesticides are often used to destroy or impair the activity of organisms that attack crops. There are some reports in the literature concerning the decline of many wildlife populations as a result of contamination of their habitats by pesticides. One of the putative
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012
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21. Testicular morphology of adult wistar rats treated with Rudgea viburnoides (Cham.) Benth. leaf infusion
The present study was carried out to investigate the effects of Rudgea viburnoides infusion on the body biometry and testicular morphometry and stereology of adult Wistar rats. Two groups received the infusion daily at the concentration of 3 or 6 mg/mL for 40 days. The control group received only water. Neither the biometrical parameters nor the tubular diam
Brazilian Archives of Biology and Technology. Publicado em: 2012-02
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22. Effects of catuaba cristal® on the testis of wistar rats
The aim of this study was to evaluate the possible beneficial effects of Catuaba Cristal® (CC), an alcoholic drink made from wine and Erythroxylum catuaba Ar. Cam on testis. Wistar rats either received CC solution (n=8) or water (n=9). Results showed significant body weight reduction within the CC group, although, no weight changes were observed for liver,
Brazilian Archives of Biology and Technology. Publicado em: 2011-10
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23. Análise morfofuncional e imuno-histoquímica das células de Leydig e dos macrófagos testiculares em ratos, após a exposição à nicotina durante as fases pré-natal e de lactação / Morphofunctional and immunohistochemical analysis of the Leydig cells and testicular macrophages in rats, after nicotine exposure during the prenatal phase and lactation
A nicotina e altamente consumida, por ser um componente do cigarro. Em gestantes, atravessa a membrana placentaria e esta presente no leite materno. A nicotina induz apoptose em celulas de diferentes orgaos, interfere nas funcoes endocrinas e pode causar atrofia testicular, disfuncoes de erecao e das gonadas, bem como infertilidade masculina. Ela tambem supr
Publicado em: 2010
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24. Clinical, pathological and morphometric study of ten male disgenetic pseudohermaphroditism (DSD 46,XY) / Estudo investigativo clínico, laboratorial, patológico, morfométrico, molecular de 10 pacientes com pseudohermafroditismo masculino disgenético (ADS 46, XY)
O Pseudohermafroditismo masculino disgenético (Anomalia da diferenciação sexual 46,XY ADS 46,XY) é definido como ambigüidade genital num paciente com testículos e/ou cariótipo 46,XY com uma das seguintes características: alteração histológica testicular, ausência ou hipoplasia das células de Leydig em tecido previamente estimulado com gonadotrof
Publicado em: 2010