POTENTIAL ANTIOXIDANT ACTIVITY OF MARINE RED ALGA GRATELOUPIA FILICINA EXTRACTS |
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| Authors: | YASANTHA ATHUKORALA KI-WAN LEE CHOONBOK SONG CHANG-BUM AHN TAI-SUN SHIN YONG-JUN CHA FEREIDOON SHAHIDI YOU-JIN JEON |
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| Affiliation: | Faculty of Applied Marine Science Cheju National University Jeju 690–756, Korea;Dept. of Food Science and Nutrition Yosu National University Yosu 550–749, Korea;Dept. of Food Science and Nutrition Changwon National University Changwon 641–773, Korea;Dept. of Biochemistry Memorial University of Newfoundland St. John's, NL, Canada, A1B 3X9 |
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| Abstract: | Grateloupia filicina is an important alga cultivated as a source of food in Korea and Japan. In order to examine its potential antioxidant activity, crude extracts of G. filicina were evaluated for their effect on scavenging of reactive oxygen species (DPPH, H, H2O2 and O2) and inhibition of lipid peroxidation. The activities of these extracts were compared with those of commercial antioxidants such as BHA, BHT and α-tocopherol. The methanolic extract (2 mg/mL) of G. filicina scavenged 82% of DPPH radicals which is almost three times higher than that of BHT. The same methanolic extract scavenged 65% of superoxide onion which is almost two times higher than that of BHT and α-tocopherol. In contrast, the extracts in chloroform and carbon tetrachloride inhibited lipid peroxidation more effectively than all commercial antioxidants tested in a linoleic acid model system. |
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