Resumo

TEIBLER, G.P. et al. Daño vascular inducido en el pie equino por veneno de la serpiente Bothrops diporus. Rev. vet. [online]. 2017, vol.28, n.1, pp.41-46. ISSN 1669-6840.

In this work we study the effects caused by the venom of Bothrops diporus on the dense vascular network that supplies the equine foot. In order to analyze the in vitro effects, samples of the knee area of five horse hoofs were incubated in DMEM (Dulbecco´s Modified Eagle´s Medium) plus 50 ug snake venom in cell culture plates. Samples incubated with DMEM and without venom were considered as controls. All the samples were incubated at 37 °C in a 5% carbon dioxide atmosphere, 95% humidity during 24 and 48 hours. After incubation samples were fixed in buffered formaldehyde and processed according to the classical techniques for histopathology, stained with hematoxylin and eosin (H&E) and periodic acid-Schiff (PAS) for observation under optic microscope. Samples for transmission electron microscopy (TEM) were treated by the classic method. Samples stained with H&E showed arteriolar endothelial cell detachment, strong basophilic, enlarged and rounded nuclei. The metarterioles had disruption of the vascular wall and separation of the layers of the tunica media with endothelial macrocariosis. Venules showed the same damage as well as disrup tion of the wall vessel. PAS staining showed damage at the basal membrane of endothelial cells of all the vessels under study. TEM showed mitochondria in certain parts of the cytoplasm with increased electrodensity. Pinocytic citoplasmic vesicles showed variable size, with irregular distribution, with altered cell junctions. The experimental model using biopsy as the primary culture allowed the study of alterations in the vascular network induced by the toxins present in the venom. Thus, it can be considered a useful tool considering as it does not affect the animal's health.

Palavras-chave : equine; snake venom; foot biopsy; cell culture; optical and transmission electron microscopy.

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