Vitae (Jan 2007)
ACTIVIDAD ANTIAGREGANTE DEL EXTRACTO ETANÓLICO DE Solanum tuberosum EN PLAQUETAS HUMANAS ANTIAGGREGANT ACTIVITY OF THE ETHANOLIC EXTRACTS OF Solanum tuberosum IN HUMAN PLATELETS
Abstract
Se evaluó la actividad antiagregante en plaquetas humanas del extracto etanólico (96%, residuo seco) obtenido de las cáscaras de los tubérculos de Solanum tuberosum, especie medicinal que se utiliza etnobotánicamente en Colombia para el tratamiento de la hipertensión arterial. El material obtenido de dos variedades, sabanera y pastusa, presentó, en función de la dosis (1 µg/mL -100 µg/mL), efectos antiagregantes in vitro en plaquetas estimuladas con adenosindifosfato (ADP 10 µM), epinefrina (300 µM), colágeno (10 µg/mL) y ácido araquidónico (AA 150 µg/mL). Los valores de CI50 obtenidos por las variedades sabanera y pastusa fueron respectivamente de: 1,8 µg/mL y 0,4 mg/mL frente a ADP, 4,4 µg/mL y 0,1 mg/mL frente a epinefrina, 34,1 µg/mL y 1,3 mg/mL, frente a colágeno y 12,3 µg/mL y The plant Solanum tuberosum is used in Colombian folk medicine for the treatment of hypertension. We evaluated the antiaggregant properties on human platelets of an ethanolic extract (96%) obtained from the skin of tubers of this species. Extracts from two varieties, sabanera and pastusa revealed in vitro dose-dependent (10-100 mg/mL) antiaggregant effects on platelets stimulated with adenosindiphosphate (ADP 10 µM), epinephrine (300 µM), collagen (10 µg/mL), and arachidonic acid (150 µg/mL). The IC50 values for the sabanera and pastusa varieties were, respectively, 1,8 µg/mL and 0,4 mg/mL, against ADP; 4,4 µg/mL and 0,1 mg/mL against epinephrine; 34,1 µg/mL and 1,3 mg/mL against collagen, and 12,3 µg/mL and < 0,1 µg/mL, against arachidonic acid, a key precursor in prostaglandin synthesis. Our findings suggest that S. tuberosum has a promising pharmacological profile since it combines the hypotensive effects, previously described, with the antiaggregant ones; therefore, it is potentially useful for the treatment of cardiovascular disorders such as hypertension and coronary artery disease.
