Insulina e dexametasona na aerocistite aguda induzida por Aeromonas hydrophila em tilápias do Nilo, Oreochromis niloticus, Aloxano-diabéticas
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2014-01-14
Autores
Prado, Ed Johnny da Rosa [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Na avaliação da participação da insulina e dos efeitos da dexametasona sobre a resposta de tilápias do Nilo, Oreochromis niloticus, durante aerocistite induzida por Aeromonas hydrophila, foram utilizadas 189 tilápias com peso médio 532g (± 74g), constituindo nove tratamentos: Não tratado e Não inoculado (controle); Não tratado e inoculado; Tratado com insulina (INS) e inoculado; Tratado com INS + Aloxano (ALOX) e inoculado; Tratado com insulina (INS)+ dexametasona (DEXA) e inoculado; Tratado com ALOX e inoculado; Tratado com ALOX + DEXA e inoculado; Tratado DEXA e inoculado; Tratados com INS + ALOX + DEXA e inoculado. Após, seis, 24 e 48 horas após inóculo (HPI), as tilápias foram submetidas à anestesia profunda para colheita de sangue para determinação do hemograma completo e bioquímico sérico, assim como, obtenção de exsudato. Da mesma forma, foram realizados estudos dos índices somáticos hepáticos, esplênicos e renais, além do histopatológico destes mesmos órgãos. Contudo, as avaliações na aerocistite infecciosa revelaram o predomínio de neutrófilos no local inflamado, sendo esta alteração mais significativa 24 HPI, apresentando um padrão de inflamação aguda fibrinossupurativa na histopatologia. A neutrofilia apresentou correspondência com as alterações renais na porção cranial, sendo este resultado fortemente influenciado pela tratamento com insulina. O tratamento com dexametasona suprimiu a resposta imune inata das tilápias, resultando em linfopenia e monocitopenia, seguida pela ausência de macrófagos no exsudato durante a evolução da reação inflamatória infecciosa. Hiperglicemia e hipercolesterolemia em tilápias tratadas com dexametasona confirmaram o efeito glicocorticoide sobre o metabolismo intermediário dos peixes. A administração de aloxano resultou em alterações clínico-patológicos no globo ocular, tecido hepático e tecido...
For assessing the contribution of insulin and the dexamethasone effects on the response of Nile tilapia, Oreochromis niloticus, during Aeromonas hydrophila induced aerocistite, were used 189 tilapia mean weight 532g (± 74g) distributed in nine treatments: Untreated and not inoculated (control); Untreated and inoculated; Treated with insulin (INS) and inoculated; Treated with INS + alloxan (ALOX) and inoculated; Treated with insulin (INS) + dexamethasone (DEXA) and inoculated; Inoculated and treated with ALOX; Treated with ALOX + DEXA and inoculated; DEXA Treated and inoculated; Treated with INS + ALOX + DEXA and inoculated. After six, 24 and 48 hours post inoculation (HPI), tilapia were subjected to deep anesthesia for blood samples collection to determinate of complete blood count and serum biochemistry, as well as for obtaining exudate. Studies of liver, spleen and kidney somatic index were performed, and histopathology study was realized with the same organs. However, the infectious aerocistite revealed a predominance of neutrophils in the inflamed site, which was most significant at 24 HPI, with a pattern of fibrinossuppurative exudate, showing correspondence with renal changes in the cranial portion, principally in fish treated with insulin. The immunosuppressive effect of dexamethasone resulted in lymphopenia and monocytopenia, followed by the absence of macrophages in the exudate during the evolution of infectious inflammatory reaction. Hyperglycemia and hypercholesterolemia in dexamethasone treated tilapia confirmed the glucocorticoid effect on the intermediary metabolism. The administration of alloxan resulted in clinical and pathological changes in eyeball, liver tissue, skeletal muscle tissue, accompanied by increase in the amounts of glucose, triglycerides, cholesterol and serum alkaline phosphatase. The histopathology of cutaneous tissue and skeletal muscle in ...
For assessing the contribution of insulin and the dexamethasone effects on the response of Nile tilapia, Oreochromis niloticus, during Aeromonas hydrophila induced aerocistite, were used 189 tilapia mean weight 532g (± 74g) distributed in nine treatments: Untreated and not inoculated (control); Untreated and inoculated; Treated with insulin (INS) and inoculated; Treated with INS + alloxan (ALOX) and inoculated; Treated with insulin (INS) + dexamethasone (DEXA) and inoculated; Inoculated and treated with ALOX; Treated with ALOX + DEXA and inoculated; DEXA Treated and inoculated; Treated with INS + ALOX + DEXA and inoculated. After six, 24 and 48 hours post inoculation (HPI), tilapia were subjected to deep anesthesia for blood samples collection to determinate of complete blood count and serum biochemistry, as well as for obtaining exudate. Studies of liver, spleen and kidney somatic index were performed, and histopathology study was realized with the same organs. However, the infectious aerocistite revealed a predominance of neutrophils in the inflamed site, which was most significant at 24 HPI, with a pattern of fibrinossuppurative exudate, showing correspondence with renal changes in the cranial portion, principally in fish treated with insulin. The immunosuppressive effect of dexamethasone resulted in lymphopenia and monocytopenia, followed by the absence of macrophages in the exudate during the evolution of infectious inflammatory reaction. Hyperglycemia and hypercholesterolemia in dexamethasone treated tilapia confirmed the glucocorticoid effect on the intermediary metabolism. The administration of alloxan resulted in clinical and pathological changes in eyeball, liver tissue, skeletal muscle tissue, accompanied by increase in the amounts of glucose, triglycerides, cholesterol and serum alkaline phosphatase. The histopathology of cutaneous tissue and skeletal muscle in ...
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Palavras-chave
Peixe, Tilápia-do-Nilo, Inflamação, Glicocorticoides, Diabetes, Teleósteo, Fishes
Como citar
PRADO, Ed Johnny da Rosa. Insulina e dexametasona na aerocistite aguda induzida por Aeromonas hydrophila em tilápias do Nilo, Oreochromis niloticus, Aloxano-diabéticas. 2014. xxiv, 78 p. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, 2014.