Antioxidative and Antigenotoxic Effects of Garlic (Allium sativum L.) Prepared by Different Processing Methods |
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Authors: | Jae-Hee Park Yoo Kyoung Park Eunju Park |
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Affiliation: | (1) Department of Food and Nutrition, Kyungnam University, Masan, 631-701, Republic of Korea;(2) Department of Medical Nutrition, Kyunghee University, Masan, 446-701, Republic of Korea; |
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Abstract: | This study describes the antioxidant activities and antigenotoxic effects of garlic extracts prepared by different processing methods. Aged-garlic extract (AGE) showed a significantly higher total phenolic content (562.6 ± 1.92 mg/100 g garlic acid equivalents) than those of raw garlic extract (RGE) or heated garlic extract (HGE). The SC50 for DPPH RSA in HGE was significantly the highest at 2.1 mg/ml. The SC50 for SOD-like activity in garlic extracts was, in decreasing order, RGE (7.3 mg/ml) > AGE (8.5 mg/ml) > HGE (9.2 mg /ml). The ED50 of AGE was the highest (19.3 μg/ml) regarding H2O2 induced DNA damage and its inhibition rate was 70.8%. The ED50 of RGE for 4-hydroxynonenal (a lipid peroxidation product) induced DNA damage was 38.6 μg/ml, followed by AGE > HGE. Although the heat treatment of garlic tended to decrease the TPC and SOD-like activity and increased DPPH RSA, garlic, in general, has significant antioxidant activity and protective effects against oxidative DNA damage regardless of processing method. |
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