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Snakebite-induced acute renal failure: an experimental model
E A Burdmann1, V Woronik, E B Prado
1Department of Medicine, School of Medicine, University of Sao Paulo, Brazil.
The American Journal of Tropical Medicine and Hygiene
|January 1, 1993
Summary
Researchers developed a new animal model for acute renal failure (ARF) following snakebites. This model, using Bothrops jararaca venom in rats, mimics human ARF and helps study venom-induced kidney damage.
Area of Science:
- Nephrology
- Toxicology
- Veterinary Medicine
Background:
- Acute renal failure (ARF) is a common complication of Viperidae snakebites.
- A lack of reproducible animal models has hindered understanding of snakebite-induced renal damage mechanisms.
Purpose of the Study:
- To establish a reproducible animal model for studying acute renal failure induced by snake venom.
- To investigate the functional and morphological changes in the kidneys following envenomation.
Main Methods:
- Intravenous injection of rats with Bothrops jararaca venom (0.4 mg/kg).
- Assessment of renal function (glomerular filtration rate, diuresis, renal plasma flow).
- Hematological analysis (hematocrit, fibrinogen, lactate dehydrogenase, free hemoglobin).
- Histopathological examination (light and electron microscopy) of renal tissues.
Main Results:
- The model demonstrated decreased glomerular filtration rate, diuresis, and renal plasma flow.
- Intravascular hemolysis was evident, indicated by decreased hematocrit and increased plasma lactate dehydrogenase and free hemoglobin.
- Microscopy revealed significant fibrin deposition in glomeruli, tubular necrosis, and red blood cell casts.
Conclusions:
- A reproducible rat model for snakebite-induced acute renal failure was successfully established.
- Glomerular coagulation and intravascular hemolysis are key factors in venom-induced renal dysfunction.
- Direct venom nephrotoxicity cannot be ruled out as a contributing factor.
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