ANTIOXIDANT POTENTIAL OF SOME SPECIES OF THE GENUS Bomarea (ALSTROEMERIACEAE) POTENCIAL ANTIOXIDANTE DE ALGUNAS ESPECIES DEL GÉNERO Bomarea (ALSTROEMERIACEAE)

This work evaluated the antioxidant activity of ethanol extracts from 11 species of the genus Bomarea (Alstroemeriaceae) by means of two in vitro methods. Values of CE50 between 51 and 333 µg/mL were obtained for DPPH the test, and the highest activity levels were found for B. glaucescens,...

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Bibliographic Details
Main Authors: Fernando A ALZATE G, Jorge A GIL Q, Nora del S JIMÉNEZ U, Gabriel J ARANGO A, Bernard WENIGER
Format: Article
Language:English
Published: Universidad de Antioquia 2011-05-01
Series:Vitae
Subjects:
Online Access:http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0121-40042011000200011
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Summary:This work evaluated the antioxidant activity of ethanol extracts from 11 species of the genus Bomarea (Alstroemeriaceae) by means of two in vitro methods. Values of CE50 between 51 and 333 &micro;g/mL were obtained for DPPH the test, and the highest activity levels were found for B. glaucescens, B. setacea, B. pardina and B. euryantha, which presented a similar CE50 or lower than the reference used, silymarin (70.6 ug/mL). Likewise, the TBARS method showed that the maximum inhibition of lipid peroxidation of the linoleic acid was produced by B. hirsuta (malondialdehyde = 0.429 &micro;M), followed by B. bredemeyerana (0.474 &micro;M), B. callejasiana (0.479 &micro;M), B. euryantha (0.489 &micro;M), B. glaberrima (0.497 &micro;M), and B. setacea (0.500 &micro;M). Additionally, the concentration of phenol compounds was evaluated by the Folin-Ciocalteau method, finding that B. setacea presented the highest content of these (159.75 gallic acid equivalents/mg of extract). Bomarea setacea showed the highest antioxidant properties demonstrated by its free-radical scavenging and significant inhibition capacity of the oxidation of linoleic acid.<br>En este trabajo se evaluó la actividad antioxidante de extractos etanólicos de 11 especies del género Bomarea (Alstroemeriaceae) por medio de métodos in vitro. Los valores de CE50 obtenidos con la prueba de DPPH se encuentran entre 51 y 333 &micro;g/mL, siendo los valores más altos los obtenidos para B. glaucescens, B. setacea, B. pardina y B. euryantha, los cuales presentaron CE50 similares o inferiores al referente utilizado: silimarina (70,6 &micro;g/mL). Con el método TBARS se encontró que la máxima inhibición de la lipoperoxidación del ácido linoléico, se produce por B. hirsuta (malondialdehido = 0,429 &micro;M), seguida por B. bredemeyerana (0,474 &micro;M), B. callejasiana (0,479 &micro;M), B. euryantha (0,489 &micro;M), B. glaberrima (0,497 &micro;M) y B. setacea (0,500 &micro;M). Se evaluó además el contenido de compuestos fenólicos por el método Folin-Ciocalteau, encontrando que B. setacea presenta el mayor contenido de éstos (159,75 equivalentes de ácido gálico /mg de extracto). La especie B. setacea presenta mayores propiedades antioxidantes, evidenciado esto en su actividad estabilizadora de radicales libres y significativa capacidad de inhibir la oxidación del ácido linoléico.
ISSN:0121-4004