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Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/4891

Title: Gastroprotective effect and cytotoxicity of terpenes from the Paraguayan crude drug “yagua rova” (Jatropha isabelli)
Authors: Pertino, M.
Schmeda-Hirschmann, G.
Rodriguez, J.
Theoduloz, C.
Keywords: Jatropha isabelli; Euphorbiaceae; Jatrophone derivatives; Jatropholones; Gastroprotective effect; Cytotoxicity; Paraguay
Issue Date: 2007
Publisher: Elsevier Ireland Ltd
Citation: Journal of Ethnopharmacology 111(3): 553-559
Abstract: A new jatrophone derivative (6), jatrophone (3), jatropholone A (4) and jatropholone B (5), acetyl aleuritolic acid (1), cyperenoic acid (2) and a monoterpene were isolated from the rhizomes of the Paraguayan crude drug Jatropha isabelli. The compounds were characterized by spectroscopic means. The gastroprotective effect of jatrophone, jatropholone A and B as well as 9β,13-dihydroxyisabellione 6 and the triterpene 1 was assessed in the HCl/EtOH-induced gastric lesions model in mice. Jatrophone elicited a strong gastroprotective effect with no significant differences between 25, 50 or 100 mg/kg and reducing lesions from 88 to 93%. The jatropholones A and B showed remarkable differences in the gastroprotective assay. Jatropholone A presented a dose-related response, with maximum effect (54% lesion reduction) at the highest dose (100 mg/kg), jatropholone B showed a strong action at all the doses, reducing lesions by 83–91%. The cytotoxicity of the compounds was assessed towards fibroblasts and AGS cells. Jatrophone was toxic against both cell lines (IC50 values: 2.8 and 2.5 μM, respectively). Jatropholone B (5) was not cytotoxic while jatropholone A (4) displayed a selective effect against AGS cells (IC50: 49 μM). The relevance of stereochemistry in the biological effects is clear comparing the effect of jatropholone A and B against AGS cells, with IC50 values of 49 and >1000 μM for the β and C-16 isomers, respectively. The results provide scientific support for the use of “yagua rova” as a gastroprotective crude drug in Paraguayan traditional medicine.
Description: Mariano Pertinoa and Guillermo Schmeda-Hirschmann. Laboratorio de Química de Productos Naturales, Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, Talca, Chile Jaime A. Rodríguez and Cristina Theoduloz. Departamento de Ciencias Básicas Biomédicas, Facultad de Ciencias de la Salud, Universidad de Talca, Casilla 747, Talca, Chile
URI: http://dspace.utalca.cl/handle/1950/4891
ISSN: 0378-8741
Appears in Collections:Artículos en publicaciones ISI - Universidad de Talca

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