Efecto hepatoprotector del extracto acuoso de Smallanthus sonchifolius (yacón) en un modelo de intoxicación con acetaminofén

Objectives: To determine in serum and erythrocytes the yacon leaves (EAY) aqueous extract hepatoprotective effect in a model of acetaminophen poisoning in rats. Design: Experimental, cross sectional. Institution: Biochemistry and Nutrition Research Center, Faculty of Medicine, Universidad Nacional Mayor de San Marcos, Lima, Peru. Biological material: Yacon leaves. Interventions: Five groups of female rats (n = 6) received orally for five days either saline (SF), EAY or silymarin (Sil) (50 mg/kg) and after 1 hour, SF or acetaminophen (A) 250 mg/kg, as follows: G1 (control; SF-SF), G2 (SF-A), G3 (EAY (200 mg/kg)-A), G4 (EAY (400 mg/kg)-A) and G5 (Sil-A). Main outcome measures: Aspartate amino transferase activity (AST), alanine amino transferase (ALT), alkaline phosphatase (ALP), and γ-glutamyltranspeptidase (γ-GTP); total bilirubin levels (BT), protein and lipid peroxidation (MDA). Superoxide dismutase (SOD), catalase (CAT) and hemoglobin activities in erythrocytes. Results: There was significant increase of γ-GTP activity (p <0.05) between group G2 and groups G3 and G4, and significant decrease (p <0.05) in proteins in group G2 in relation to group G1. MDA level was lower in the group receiving 200 mg/kg of EAY with respect to control. AST, ALT and FAL activities showed no significant differences. SOD/CAT ratio was similar between groups G1, G4 and G5, evidence of recovery from acetaminophen damage. Conclusions: EAY administration had hepatoprotective effect comparable to silymarin.hepatoprotector. Objetivos: Evaluar en suero y hematíes el efecto hepatoprotector del extracto acuoso de hojas de yacón (EAY) en un modelo de intoxicación con acetaminofén en ratas. Diseño: Experimental, transversal. Institución: Centro de Investigación de Bioquímica y Nutrición, Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material biológico: Hojas de yacón. Intervenciones: Se formó cinco grupos de ratas hembra (n=6) que recibieron por cinco días, por vía oral, suero fisiológico (SF), EAY o silimarina (Sil) (50 mg/kg) y luego de 1 hora, SF o acetaminofén (A) 250 mg/kg, según lo siguiente: G1 (control; SF-SF), G2 (SF-A), G3 (EAY (200 mg/kg)-A), G4 (EAY (400 mg/kg)-A) y G5 (Sil-A). Principales medidas de los resultados: Actividad de aspartato amino transferasas (AST), alanina amino transferasa (ALT), fosfatasa alcalina (FAL) y γ-glutamiltranspeptidasa (γ-GTP); niveles de bilirrubina total (BT), proteínas y lipoperoxidación (MDA). En hematíes, actividades de superóxido dismutasa (SOD), catalasa (CAT) y hemoglobina. Resultados: Se observó aumento significativo (p<0,05) en la actividad de γ-GTP entre el grupo G2 y los grupos G3 y G4. Hubo disminución significativa (p