Leydig Cells
Mostrando 25-36 de 152 artigos, teses e dissertações.
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25. Tumores testiculares na infância
Testicular and paratesticular prepuberal tumors are rare. They represent around 1% of the total of tumors of infancy. They subdivide in 2 groups: germ cells tumors and non germ cells tumors, being able to occur in all the ages, and about 75% are malignant, and about 19% of these they present metastasis. The tumors of germ cells tumors represent 60 75% of the
Revista do Colégio Brasileiro de Cirurgiões. Publicado em: 2009-02
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26. Testicular development of the Mongolian gerbil : postnatal differentiation of germ and Leydig cells / Desenvolvimento testicular no gerbilo da Mongolia : diferenciação pos-natal das celulas germinativas e de Leydig
O gerbilo da Mongólia (Meriones unguiculatus) tem sido utilizado de maneira crescente em estudos sobre o sistema genital masculino. Alguns aspectos da espermatogênese e o ciclo do epitélio seminífero dessa espécie são conhecidos, mas investigações sobre o desenvolvimento pós-natal do testículo e diferenciação das suas principais populações celu
Publicado em: 2009
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27. Morphophunctional assessments of testis in adult coatis (Nasua nasua Linnaeus, 1766) / Avaliação morfofuncional do testículo de quatis (Nasua nasua, Linnaeus, 1766) adultos
The study of the testicular morphophysiology in wild animals has been increased in the last years, seeking the development of protocols in assisted reproduction, due the constants threats on the fauna with the crescent human development. On the other hand, some few species, like the procyonids coati (Nasua nasua), present great adaptability to adverse condit
Publicado em: 2009
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28. Testicular morphology and morphometry in mice chronically exposed to arsenic / Morfologia e morfometria testicular de camundongos adultos submetidos à exposição crônica ao arsenato
There is an increasing concern about the potentially harmful effects of several environmental pollutants, as for instance, the inorganic arsenic, one of the main pollutants of the water worldwide. The intoxication by arsenic can be acute or chronic, and lead to a variety of pathologies and impairment of male reproductive system. This work aimed to investigat
Publicado em: 2009
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29. Morfometria testicular em ratos wistar adultos tratados com paracetamol (acetaminofeno) / Testis morphometry in adult Wistar rats treated with acetaminophen
Acetaminophen is non-prescrition analgesic and antipyretic considered safe and well tolerated in therapeutics doses, but it might cause hepatic and extrahepatic damage in animal and human models exposed to high doses. The chronic use of paracetamol in supratherapeutics doses has been implied in testicular lesions and sexual behavior alterations in animal mod
Publicado em: 2008
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30. Morphofunctional evaluation of the testis and the process of spermatogenic the oncilla (Leopardus tigrinus, SCHREBER, 1775) adult / Avaliação morfofuncional do testículo e do processo espermatogênico do gato-do-mato-pequeno (Leopardus tigrinus, SCHREBER, 1775) adulto
The study of testicular morphology and the spermatogenic process in wild animals is fundamentally important for the knowledge about the physiologic patterns, by which the assisted reproduction protocols are established. The objectives of this study were to describe morphometry data of testis and seminiferous tubule, quantify and describe the arrangement of t
Publicado em: 2008
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31. Testicular morphometry and morphology in insectivorous bat (Molossus molossus Pallas, 1776) (Chiroptera, Molossidae) / Morfologia e morfometria testicular em morcego insetívoro (Molossus molossus Pallas, 1776) (Chiroptera, Molossidae)
Testicular morphometric analysis have been implemented in order to infer on the gonadal dynamics and reproductive capacity of the insectivorous bat Molossus molossus in the southeast of Minas Gerais, Brazil, collected during the four annual climatic seasons, from 2007 to 2008. After euthanasia animal tissues were collected and included in methacrylate, and h
Publicado em: 2008
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32. Estrogens and male reproduction: a new concept
The mammalian testis serves two main functions: production of spermatozoa and synthesis of steroids; among them estrogens are the end products obtained from the irreversible transformation of androgens by a microsomal enzymatic complex named aromatase. The aromatase is encoded by a single gene (cyp19) in humans which contains 18 exons, 9 of them being transl
Brazilian Journal of Medical and Biological Research. Publicado em: 2007-06
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33. Association of cyclosporine and Heteropterys aphrodisiaca (no-de-cachorro) administered to Wistar rats : testicular structure, ultrastructure and morphometry / Associação de ciclosporina e Heteropterys aphrodisiaca (no-de-cachorro) adminstrados a ratos wistar : estrutura, ultra-estrutura e morfometria testicular
Cyclosporine A (CsA) has potent immunosuppressive properties and it has markedly improved the ability of transplant patients to survive grafts and is also used in some autoimmune diseases. However, the drug has several side effects, including testicular toxicity, leading to male infertility (and temporary impotence). Stimulant and aphrodisiac properties has
Publicado em: 2007
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34. Morfometria testicular de ratos Wistar adultos tratados com infusão aquosa de catuaba (Trichilia catigua A. Juss. Meliaceae) / Testicular morphometry of adult Wistar rats treated with aqueous infusion of catuaba (Trichilia catigua A. Juss. Meliaceae)
Throughout the last decades, it was observed an increase of the search for substances of vegetal origin, which can act in the reproductive organs assisting in the performance of the sexual functions, mainly of males. However, a few works have been doing to evaluate the effect of those substances in the reproductive organs. The effect of the extracts of Trich
Publicado em: 2007
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35. Influência da pentoxifilina no desenvolvimento testicular neonatal e no processo espermatogênico de ratos Wistar adultos.
Objetivou-se estudar a influência da pentoxifilina no desenvolvimento testicular durante o período neonatal e no processo espermatogênico de ratos Wistar adultos. Foram utilizados 37 ratos neonatos Wistar, os quais foram submetidos aos diversos tratamentos, durante os primeiros 21 dias de vida, de acordo com o grupo experimental: controle (n=10), 1mg/kg (
Publicado em: 2007
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36. Histological and stereological analysis of epididymis and Leydig cells in mice submitted to experimental cryptorchidism and orchidopexy / Analise histologica e estereologica do epididimo e celulas deLeydig em camundongos submetidos ao criptorquidismo experimental e orquidopexia
The mammalian epididymis, through secretion of androgen-dependents proteins, is responsible for maturation of the sperm aiming fecundation process, modifying the sperm in theirs morphological and biochemical features. Cryptorchidism is a pathological condition in which testis and epididymis are retained in the abdominal cavity, resulting in interruption of t
Publicado em: 2006