Caracterização de uma amostra de cetáceos arrojados que apresentaram glóbulos hialinos no citoplasma de hepatócitos
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2014
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Nos animais, o fígado é um dos órgãos fundamentais para uma adequada homeostasia. Sendo os cetáceos mamíferos, exclusivamente aquáticos, que vivem nos mares, rios e/ou estuários, este órgão desempenha um papel importante frente aos desafios da vida no ambiente marinho. A presença de glóbulos hialinos no citoplasma de hepatócitos foi observada microscopicamente e descrita no fígado de cetáceos. Contudo, a natureza e mecanismos de desenvolvimento de tais glóbulos são pouco conhecidos.
O presente trabalho, desenvolvido nas Ilhas Canarias, procurou investigar a presença de glóbulos hialinos nos hepatócitos de cetáceos arrojados entre 2009 e 2013, do ponto de vista epidemiológico, tendo em conta factores como espécie e idade, assim como tipo de arrojamento, entre outros.
De 170 amostras de fígado foi possível avaliar 100, das quais 69 apresentaram glóbulos hialinos. Estes parecem estar relacionados com congestão hepática em animais bem nutridos, e o seu aparecimento é independente da espécie, sexo e idade dos animais. Factores como má nutrição e arrojamento por doença não consumptiva de origem natural parecem inibir a formação destas estruturas.
In animals, the liver is the key organ for proper homeostasis. Since cetaceans are exclusively aquatic mammals that live in the sea, rivers and/or estuaries, this organ plays an important role towards the challenges of life in a marine environment. The presence of hyaline cells in the cytoplasm of hepatocytes was microscopically observed and described in the liver of cetaceans. However, the nature and mechanisms involved in the appearance of these cells are poorly understood. This work, developed in the Canary Islands, attempted to investigate the presence of hyaline globules in hepatocytes of cetaceans stranded between 2009 and 2013, from the epidemiological point of view, taking into account factors such as species and age, and type of stranding, among others. From 170 liver samples was possible to evaluate 100, of which 69 showed hyaline globules. These seem to be related to hepatic congestion in well-nourished animals, and their occurrence is independent of species, sex and age of the animals. Factors such as low nutrition and stranding by a non-consumptive disease of natural origin appear to inhibit the formation of these structures.
In animals, the liver is the key organ for proper homeostasis. Since cetaceans are exclusively aquatic mammals that live in the sea, rivers and/or estuaries, this organ plays an important role towards the challenges of life in a marine environment. The presence of hyaline cells in the cytoplasm of hepatocytes was microscopically observed and described in the liver of cetaceans. However, the nature and mechanisms involved in the appearance of these cells are poorly understood. This work, developed in the Canary Islands, attempted to investigate the presence of hyaline globules in hepatocytes of cetaceans stranded between 2009 and 2013, from the epidemiological point of view, taking into account factors such as species and age, and type of stranding, among others. From 170 liver samples was possible to evaluate 100, of which 69 showed hyaline globules. These seem to be related to hepatic congestion in well-nourished animals, and their occurrence is independent of species, sex and age of the animals. Factors such as low nutrition and stranding by a non-consumptive disease of natural origin appear to inhibit the formation of these structures.
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Orientação: Ana Godinho
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VETERINÁRIA, MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA, CETÁCEOS, FÍGADO, CETACEANS, LIVER, MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA, FISIOPATOLOGIA, PHYSIOPATHOLOGY, EPIDEMIOLOGIA VETERINÁRIA, ANIMAL EPIDEMIOLOGY, MEDICINA VETERINÁRIA, VETERINARY MEDICINE