Seminiferous Tubules
Mostrando 13-24 de 122 artigos, teses e dissertações.
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13. A bradykinin-potentiating peptide (BPP-10c) from Bothrops jararaca induces changes in seminiferous tubules
Background The testis-specific isoform of angiotensin-converting enzyme (tACE) is exclusively expressed in germ cells during spermatogenesis. Although the exact role of tACE in male fertility is unknown, it clearly plays a critical function in spermatogenesis. The dipeptidase domain of tACE is identical to the C-terminal catalytic domain of somatic ACE (sAC
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 06/11/2013
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14. Pneumoperitoneum induces morphological alterations in the rat testicle
PURPOSE:To investigate the seminiferous tubule histological morphology after an 8 mmHg pneumoperitoneum in the rat model. METHODS: Fourteen rats were divided into two groups: a Sham group submitted to anesthesia and a pneumoperitoneum (Pp) group submitted to abdominal insufflation at 8 mmHg during three hours, followed by desuflation. All rats were killed af
Acta Cir. Bras.. Publicado em: 2013-06
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15. Microdissection Testicular Sperm Extraction (micro-TESE) as a Sperm Acquisition Method for Men with Nonobstructive Azoospermia Seeking Fertility: Operative and Laboratory Aspects
Introduction Rare foci of sperm production may be found in up to 60% of men with nonobstructive azoospermia (NOA). Sperm production, if present, is minimal for sperm appearance in the ejaculate. Given that there are no treatment options to restore fertility, sperm retrieval is the only alternative to find testicular sperm than then can be used for in vitro
Int. braz j urol.. Publicado em: 2013-06
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16. 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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17. 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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18. Laboratory processing and intracytoplasmic sperm injection using epididymal and testicular spermatozoa: what can be done to improve outcomes?
There are two main reasons why sperm may be absent from semen. Obstructive azoospermia is the result of a blockage in the male reproductive tract; in this case, sperm are produced in the testicle but are trapped in the epididymis. Non-obstructive azoospermia is the result of severely impaired or non-existent sperm production. There are three different sperm-
Clinics. Publicado em: 2013
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19. 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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20. Rat testicular impairment induced by electromagnetic radiation from a conventional cellular telephone and the protective effects of the antioxidants vitamins C and E
OBJECTIVE: The aim of this study was to investigate the possible effects of electromagnetic radiation from conventional cellular phone use on the oxidant and antioxidant status in rat blood and testicular tissue and determine the possible protective role of vitamins C and E in preventing the detrimental effects of electromagnetic radiation on the testes. MAT
Clinics. Publicado em: 2012-07
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21. Ações da epitestosterona através de um mecanismo de membrana em células de Sertoli : implicações no desenvolvimento sexual
Introduction: Epitestosterone is the 17¿-epimer of testosterone. It seems to possess an antiandrogenic activity, as well as a neuroprotective effect. The mechanism of action of epitestosterone has not been elucidated. Objective: The aim of this work is to investigate the non-classical effect of epitestosterone on the membrane of Sertoli cells from testis of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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22. Reproductive ecology and diet of Cnemidophorus ocellifer Spix 1825 (Squamata: Teiidae) in a coastal area from northeastern Brazil / Ecologia reprodutiva e dieta de Cnemidophorus ocellifer Spix 1825 (Squamata: Teiidae) em Ãrea de tabuleiro no nordeste do Brasil
Chapter 1:Reproduction of Cnemidophorus ocellifer was studied based on data collected from September 2009 to August 2010 in a coastal area of the SÃo GonÃalo do Amarante municipality, CearÃ, Brazil. Lizards were captured by manual collection, with the aid of pressure rifle or tourniquet and, after dead, individuals were dissected for sex determination by
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2011
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23. Papel dos canais K+ATP na resposta eletrofisiológica ao FSH e ao isoproterenol em células de Sertoli
Follicle-stimulating hormone (FSH) produces a dual effect on the membrane potential of Sertoli cells, with an initial rapid phase, which comprises a hyperpolarization for a period of seconds and a depolarization phase, wich occurs more slowly, within minutes. The depolarization phase involves calcium entry stimulated by FSH. Isoproterenol, an agonist of ¿-a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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24. Localization of acid phosphatase activity on the testis of two teleostean species (Oreochromis niloticus and Odonthestes perugiae) / Localização da atividade da fosfatase ácida em duas espécies de teleósteos (Oreochromis niloticus e Odonthestes perugiae)
A atividade da fosfatase ácida (AcP) foi estudada em duas espécies de teleósteos em duas estações: verão e inverno. A atividade AcP foi detectada em células de Sertoli de tilápia (Oreochromis niloticus) somente durante o período não reprodutivo de seu ciclo anual, que corresponde aos meses de inverno. Em peixerei (Odonthestes perugiae), a reação
Publicado em: 2010