Free Radical Scavenging and In-vitro Antioxidant Effects of Ethanol Extract of the Medicinal Herb Chromolaena odorata Linn.
C. S. Alisi, O. A. Ojiako, C. G. Osuagwu, G. O. C. Onyeze
Journal of Pharmaceutical Research International · pp. 141–155 · Published 23 Jul 2011
10.9734/BJPR/2011/409Abstract
The ethanol extract of the leaf of Chromolaena odorata (Linn) was assessed for free-radical-scavenging and antioxidant potentials. Ability of the extract to scavenge reactive intermediates (superoxide ion O2·-, hydrogen peroxide H2O2, nitric oxide NO˙, hydroxyl radical OH˙) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals, were used to assess its free radical scavenging potentials. Antioxidant potential was studied by assessing in-vitro inhibition of lipid peroxidation in both the brain (Neuro-protective potentials) and liver homogenates of Fenton-oxidant stressed rabbits. Inhibition of protein oxidation was assessed in-vitro by loss of protein thiol (P-SH), while assessment of the reducing power of the extract was further used to assess antioxidant capacity. Results obtained showed the ability of the extract to scavenge free radicals and reactive intermediates in a dose-response manner. The plant also had good antioxidant capacity. The secondary plant metabolites found earlier in the extract may explain reasons for the bio-efficacy of the plant. These findings are of great importance in view of the availability of the plant and its observed possible diverse applications in medicine and nutrition.
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