275 resultados para Glándula endometrial


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In mares, the embryo migrates to the uterus between days 5 and 6 postovulation beginning its mobility through all uterine segments, which is essential for the maternal recognition of pregnancy. During the mobility phase, the embryonic vesicle shows a linear growth rate until its fixation between days 15 and 17, when the orientation phenomenon occurs. From fixation to day 28 of pregnancy, the embryonic growth is less evident (plateau) by cross-section ultrasound examination. After this period the linear growth rate is reestablished until day 46. This plateau is attributed to the increased uterine tone that compresses the vesicle and to volume expansion, making it difficult to detect the conceptus growth only by the cross-section diameter. Around day 20, the embryo proper is visualized as an echogenic spot in the ventral aspect of the vesicle. Additionally, development of allantoic sac, embryonic heartbeat, yolk sac regression and posterior umbilical cord formation also can be visualized from days 20 to 40. An intimate interaction between uterus and conceptus is essential for the normal pregnancy development. Color-and spectral-Doppler ultrasonography can be useful for the evaluation of this interface. A gradual increase on uterine vascularity during the early pregnancy and transient changes in endometrial vascularity accompanying the vesicle location during the mobility phase have been described. Around day 38 of gestation, the formation of the endometrial cups begins and, consequently, the synthesis of the equine chorionic gonadotropin (eCG) induces the formation and development of supplementary corpora lutea, which are important to secrete progesterone and to maintain pregnancy until around day 120.

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O objetivo do presente estudo foi realizar bioensaios para avaliação da toxicidade da hidrametilnona, (solubilizada em acetona, com e sem óleo de soja) para operárias de Atta sexdens rubropilosa, bem como a análise morfológica dos órgãos dissecados dessa espécie de formiga, cujos indivíduos foram coletados em momentos específicos dos bioensaios de toxicidade. Por meio da análise morfológica, verificou-se o efeito toxicológico do composto químico nas glândulas pós-faríngeas, no ventrículo (intestino médio) e nos túbulos de Malpighi das formigas e, adicionalmente, foi possível correlacionar esses dados morfológicos com os dados da taxa de sobrevivência obtida nos bioensaios. O experimento com a hidrametilnona, solubilizada em uma mistura de acetona e óleo, indicaram uma via alternativa de ingestão do princípio ativo das iscas formicidas devido ao fato do óleo atuar como um coadjuvante, confirmando estudos prévios que sugerem a ação da glândula pós-faríngea na metabolização dos lipídios ingeridos. Dessa forma, o óleo presente na solução de hidrametilnona poderia estar envolvido no carregamento indireto da hidrametilnona para a glândula e, consequentemente, a diminuição da concentração desse princípio ativo no lúmen intestinal. Isto explicaria o menor grau de degeneração tecidual observada no intestino das formigas tratadas com hidrametilnona solubilizada em uma solução de acetona e óleo, em comparação com formigas tratadas com hidrametilnona solubilizada somente em acetona. Os controles com adição da acetona não apresentaram diferença significativa na porcentagem de sobrevivência em relação ao grupo testemunha e este solvente não interferiu na morfofisiologia das células. Os dados obtidos foram importantes para a melhor compreensão do efeito toxicológico da hidrametilnona nestes indivíduos

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Hypothyroidism is a common endocrine disorder in dogs caused by insufficient production and secretion of thyroid hormones. Most affected dogs have primary hypothyroidism that results from lymphocytic thyroiditis, idiopathic thyroid atrophy, or more rarely, neoplastic destruction. Secondary hypothyroidism resulting from inadequate secretion of thyrotropin (thyroid-stimulating hormone –TSH) from the pituitary gland is less commonly recognized. Tertiary hypothyroidism resulting from a deficiency of hypothalamic thyrotropin-releasing hormone (TRH) has not been documented in dogs. The diagnosis of hypothyroidism in dogs is made on the basis of clinical findings, results of routine laboratory and thyroid gland function tests and response to thyroid hormone replacement. Unfortunately, these tests have high sensitivity, but low specificity, for use in the diagnosis of hypothyroidism. Thyroid hormone supplementation is indicated for the treatment of confirmed hypothyroidism and for the diagnoses of the disease through clinical response to trial therapy

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The endocrine diseases, notably Cushing's disease, are of great importance from the morbid pictures that affect the canine species. Due to the imprecision of the standard tests, the HAC can be a diagnosis difficult to confirm. Often, the clinical manifestations and biochemical and hematological findings support the diagnosis of HAC, but endocrine tests are normal or inconclusive. The excessive production of ACTH may, in the adrenals, not only stimulate the increase of glucocorticoids, but also of sex hormones. In recent studies, the concentrations of sex hormones were used as parameters to check the adrenal gland function in animals with suspected Cushing's disease, suggesting that high serum concentrations of 17 hydroxyprogesterone (17OHP) and other sex steroid hormones would be the cause of the so called atypical hyperadrenocorticism

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Pós-graduação em Medicina Veterinária - FCAV

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Endometriosis is a continuous and progressive disease with a poorly understood aetiology, pathophysiology and natural history. This study evaluated the histological differences between eutopic and ectopic endometria (abdominal wall endometriosis) and the expression of mast cell proteases (tryptase and chymase), annexin A1 (ANXA1) and formyl peptide receptor 1 (FPR1). Ectopic endometrium from 18 women with abdominal wall endometriosis and eutopic endometrium from 10 women without endometriosis were obtained. The endometrial samples were analysed by histopathology, immunohistochemistry and ultrastructural immunogold labeling to determine mast cell heterogeneity (tryptase and chymase positive cells) and the expression levels of ANXA1 and FPR1. Histopathological analysis of the endometriotic lesions showed a glandular pattern of mixed differentiation and an undifferentiated morphology with a significant influx of inflammatory cells and a change in mast cell heterogeneity, as evidenced by a significant increase in the number of chymase-positive cells and endogenous chymase expression. The undifferentiated glandular pattern of endometriotic lesions was positively associated with a marked increase and co-localization of ANXA1 and FPR1 in the epithelial cells. In conclusion, the co-upregulated expression of mast cell chymase and ANXA1–FPR1 system in ectopic endometrium suggests their involvement in the development of endometriotic lesions.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Fonoaudiologia - FFC