Leydig Cell
Mostrando 1-12 de 117 artigos, teses e dissertações.
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1. Leydig and Sertoli cell function in individuals with genital ambiguity, 46,XY karyotype, palpable gonads and normal testosterone secretion: a case-control study
Abstract BACKGROUND: Because normal male sexual differentiation is more complex than normal female sexual differentiation, there are more cases of disorders of sex development (DSDs) with 46,XY karyotype that have unclear etiology. However, Leydig and Sertoli cell markers are rarely used in distinguishing such individuals. OBJECTIVES: To evaluate the funct
Sao Paulo Medical Journal. Publicado em: 2022
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2. Malignant leydig cell tumor in a 91-year-old man: Case report
ABSTRACT Testicle tumors are a rare entity among men population, accounting for only 1-1.5% of all cancers among men. The stromal tumors of the sexual cord correspond just 4% of all testicular cancers. Only 10% of them are malignant. The major representative of the sex cord-stromal tumors is the Leydig cell tumor, corresponding to 75 to 80% of the total. It
Int. braz j urol.. Publicado em: 20/12/2019
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3. Effect of bacterial endotoxin lipopolysaccharide treatment on duck Leydig cells
Abstract This study aimed to investigate the effects of bacterial endotoxin lipopolysaccharide (LPS) on hormone production and gene expression in duck Leydig cells and its underlying mechanisms. Leydig cells were collected from 200-day-old mallard ducks and divided into five treatment groups (0, 50, 100, 200, and 400 ng/mL LPS). After treatment with LPS for
Anim. Reprod.. Publicado em: 25/11/2019
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4. Improvement of fertility parameters with Tribulus Terrestris and Anacyclus Pyrethrum treatment in male rats
ABSTRACT Objective Anacyclus Pyrethrum (AP) and Tribulus Terrestris (TT) have been reported as male infertility treatment in several studies; however, in Iranian traditional medicine these two plants are prescribed simultaneously. In this study, we aimed to determine the effects of AP and TT extracts both separately and simultaneously on the male Wistar ra
Int. braz j urol.. Publicado em: 07/11/2019
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5. Ovarian Sertoli-Leydig Cell Tumors: Epidemiological, Clinical and Prognostic Factors
Resumo Objetivo Descrever uma série de casos de tumores de células de Sertoli-Leydig (TCSLs) ovarianos. Métodos Revisão retrospectiva de 12 casos de TCSL tratados no Hospital de Câncer de Barretos entre outubro de 2009 e agosto de 2017. Resultados A mediana de idade foi 31 anos (15-71 anos). Um total de 9 pacientes (75,0%) apresentaram sintomas: 8
Rev. Bras. Ginecol. Obstet.. Publicado em: 15/08/2019
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6. Nitric oxide modulates ATP-evoked currents in mouse Leydig cells
Testosterone synthesis within Leydig cells is a calcium-dependent process. Intracellular calcium levels are regulated by different processes including ATP-activated P2X purinergic receptors, T-type Ca2+ channels modulated by the luteinizing hormone, and intracellular calcium storages recruited by a calcium-induced calcium release mechanism. On the other hand
Braz J Med Biol Res. Publicado em: 15/03/2018
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7. Negative effects of bisphenol A on testicular functions in albino rats and their abolitions with Tribulus terristeris L.
ABSTRACT This study was conducted to find out the ameliorative properties of Tribulus terristeris L (TT) on BPA induced spermatotoxicity in male albino rats. Mature male albino rats were divided into five groups, Group A was taken as control for comparison group, whereas the other four groups namely B(vehicle control), C (toxic), D (preventive control) and G
Braz. J. Pharm. Sci.. Publicado em: 26/10/2017
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8. Numeric and volumetric changes in Leydig cells during aging of rats
Abstract Purpose: To analyze the effects of aging in rats on the nuclear volume, cytoplasmic volume, and total volume of Leydig cells, as well as their number. Methods: Seventy-two Wistar rats were divided into six subgroups of 12 rats, which underwent right orchiectomy at 3, 6, 9, 12, 18, and 24 months of age. The weight and volume of the resected testic
Acta Cir. Bras.. Publicado em: 2017-10
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9. Annual male reproductive activity and stages of the seminiferous epithelium cycle of the large fruit-eating Artibeus lituratus (Chiroptera: Phyllostomidae)
The large fruit-eating phyllostomid bat, Artibeus lituratus (Olfers, 1818), forearm 69-75 mm, body mass 66-82 g, has a diversified geographic distribution in the Neotropical region. Therefore it is subjected to different climatic conditions that affect its reproduction, leading to different reproductive strategies such as continuous reproduction, seasonal mo
Zoologia (Curitiba). Publicado em: 2015-06
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10. 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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11. 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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12. Efeitos da ingestão subcrônica de arsênio sobre os testículos de camundongos adultos / Effects of arsenic subchronic ingestion on the testes of adult mice
A toxicidade de um agente químico depende de sua propensão inerente de produzir danos ao sistema biológico com o qual interage. O arsênio (As), um conhecido poluente ambiental, merece destaque como elemento potencialmente tóxico para a função reprodutiva masculina. A exposição ao As pode afetar o testículo, resultando em efeitos adversos na reprodu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/10/2011