Abstract
Zebrafish is an excellent model organism for studying tissue alterations caused by Bothrops alternatus venom (BAV) and for screening new anti-venom drugs. To study tissue alterations following exposure to BAV and the roles that glucocorticoids play in these tissue reactions, zebrafish were randomly divided into five groups: the free injection control group (FIC), the phosphate-buffered saline injection control group (PIC), the venom injected group (VI), the group treated with dexamethasone 1 h before venom injection (D1hBVI) and the group treated with dexamethasone 1 h after venom injection (D1hAVI). The concentration of BAV injected was 0.13 mg/mL and each fish received an injection of 20 μL. Body weight measurements and histopathological characteristics of the gills, kidneys, liver, and intestine were determined. Histopathological analyses showed necrosis, inflammation and weight gain in animals that received BAV. The histological alteration indices of the gills, liver, kidneys, and intestines were statistically higher in the animal groups treated with BAV. These alteration indices were lower in the D1hBVI and D1hAVI groups compared to the group treated with BAV alone. The D1hBVI group is presented with minor alterations. A s...Continue Reading
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