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Braz. j. vet. res. anim. sci ; 48(3): 200-206, jun. 2011. ilus, graf
Article in English | LILACS | ID: lil-642209

ABSTRACT

This study was carried out to evaluate leukocyte infiltration and anti-myeloperoxidase immunoreactivity in granulocytesof the mucosa and submucosa of the large intestine of horses submitted to dietetic starch overload. Eight adult horseswere allocated randomly in three treatments: Treatment I (Control) (n = 2), animals euthanized without starch overload;and Treatments II (n = 3) and III (n = 3), animals undergoing starch overload, with gastric infusion of 17.6 g starch perkg of body weight, euthanized after 24 and 36 hours, respectively. Only afflux of neutrophils in the intestinal mucosa andsubmucosa blood vessels (leukocyte stasis) was observed. Eosinophils were the predominant cells in the mucosa andsubmucosa in all horses, independent of dietetic overload, with infiltration grade from mild to moderate. Lymphocyteinfiltration was also observed in all horses, but with lower intensity when compared to eosinophils. Congestion, edemaand dilatation of lymphatic vessels were the main circulatory alterations observed, with more intensity in the submucosa.Higher immunoreactivity to the anti-myeloperoxidase antibodies was observed in the mucosa and submucosa of horses36 hours after overload. Horses submitted to dietetic starch overload showed intestinal inflammatory response withprevalence of eosinophils, leukocyte stasis and circulatory alterations, varying from discreet to moderate


Este estudo teve como objetivo avaliar a infiltração de leucócitos e a imunorreatividade antimieloperoxidase emgranulócitos da mucosa e submucosa do intestino grosso de equinos submetidos à sobrecarga dietética com amido.Oito equinos adultos foram distribuídos aleatoriamente em três tratamentos: Tratamento I (Controle) (n = 2), equinoseutanasiados sem sobrecarga com amido; Tratamento II (n = 3) e III (n = 3), equinos submetidos à sobrecarga comamido, com infusão gástrica de 17,6 g de amido/kg de peso vivo e eutanasiados após 24 e 36 horas, respectivamente.Observou-se apenas afluxo de neutrófilos (leucocitoestase) nos vasos sanguíneos da mucosa e submucosa intestinal.Eosinófilos foram as células predominantes na mucosa e submucosa em todos os equinos, independente da sobrecargadietética, com grau de infiltração de leve a moderada. Infiltração por linfócitos também foi observado em todos osequinos, porém com menor intensidade quando comparado aos eosinófilos. Congestão, edema e dilatação de vasoslinfáticos foram as principais alterações circulatórias observadas, com maior intensidade na submucosa. Maiorimunorreatividade para anticorpos antimieloperoxidase foi observado na mucosa e submucosa dos equinos 36 horasapós a sobrecarga. Equinos submetidos à sobrecarga dietética com amido apresentam resposta inflamatória intestinalcom predominância de eosinófilos, leucocitoestase e alterações circulatórias variando de discreta a moderada


Subject(s)
Animals , Dietary Carbohydrates/administration & dosage , Inflammation , Intestinal Mucosa , Leukocytes/pathology , Animal Feed/analysis , Horses , Immunohistochemistry
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