Objetivos. Determinar la actividad antiurolítica del extracto etanólico de propóleo ayacuchano en un modelo preventivo de urolitiasis inducido en ratas. Materiales y métodos. Se estudiaron 45 ratas albinas macho Sprague-Dawley. El efecto antiurolítico se analizó en cinco grupos de seis animales: blanco, control (1 mL de etilenglicol al 5% y 1 mL cloruro de amonio al 5%) y tres grupos tratados con el extracto etanólico de propóleo a dosis diaria de 250, 350 y 500 mg/Kg. Las sustancias fueron administradas mediante canulación orogástrica durante 16 días. El efecto diurético se evaluó en 15 ratas distribuidas en cinco grupos: blanco, control (furosemida 20 mg/Kg) y tres grupos tratados con extracto etanólico de propóleo a dosis de 250, 350 y 500 mg/Kg. Se midió el pH urinario, densidad urinaria y sedimentación del oxalato de calcio; la presencia de cálculos renales se evaluó mediante cortes histopatológicos por tinción con hematoxilina-eosina bajo luz polarizada. Resultados. El extracto etanólico de propóleo ayacuchano produjo cambios significativos en los valores de ácido úrico, lactato deshidrogenasa sérico, pH, densidad urinaria al comparar los tres grupos dosis; en el análisis histológico observado a luz polarizada se observó menor presencia de cristales de oxalato de calcio en células tubulares del riñón en el grupo tratado a dosis de 250 mg/Kg; el efecto diurético en el grupo tratado con dosis de 250 mg/kg fue mayor en comparación con la furosemida. Conclusiones. El extracto etanólico de propóleo ayacuchano presenta actividad antiurolítica en el modelo preventivo de urolitiasis en ratas albinas. Palabras clave: urolitiasis, furosemida, propóleo, ratas (Fuente: DeCS BIREME) ANTIUROLITHIC ACTIVITY OF THE ETHANOLIC EXTRACT OF AYACUCHANO PROPOLIS IN RATS ABSTRACTObjectives. To determine the antiurolytic activity of the ethanolic extract of Ayacuchan propolis in a preventive model of urolithiasis in rats. Materials and methods. A total of 45 male Sprague-Dawley albino rats were studied. The antiurolithic effect was analyzed in five groups of six animals each: blank, control (treated with 1 mL of 5% ethylene glycol and 1 mL of 5% ammonium chloride), and three experimental groups (treated with the ethanol extract of propolis at a daily dose of 250, 350, and 500 mg/kg, respectively). The drugs were administered by orogastric cannulation for 16 days. The diuretic effect was evaluated in 15 rats distributed in five groups: blank, control (treated with furosemide at 20 mg/kg), and three experimental groups (treated with the ethanol extract of propolis at daily doses of 250, 350, and 500 mg/kg, respectively). Urinary pH, urinary density, and sedimentation of calcium oxalate were measured. The presence of kidney stones was evaluated by examination of hematoxylin-eosin-stained histopathological sections under polarized light. Results. The ethanolic extract of Ayacuchan propolis caused significant changes in the levels of uric acid, serum lactate dehydrogenase, pH, and urinary density in the three dose groups. The results o...
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