Antioxidant and Antitumor Activities of Ethanol Extracts from Unhulled and Hulled Rice Hiami (Oryza sativa L. cv. Hiami)
2010
Woo, K.S., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Chun, A.R., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Oh, S.K., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Kim, K.J., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Kim, D.J., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Yang, C.I., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Kim, Y.G., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Kim, J.H., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Jeong, H.S., Chungbuk National University, Cheongju, Republic of Korea
To evaluate the antioxidant and antitumor potential of a newly bred rice, Hiami (Suweon-511), total polyphenol content, γ-oryzanol content, radical scavenging activities, and antitumor activities were measured (control: Ilpum). Total polyphenol contents were 6.31 and 3.75 ㎎/g for unhulled (UHR) and hulled rice (HR) of Hiami, which was higher than that of Ilpum (5.66 and 3.47 ㎎/g). The γ-oryzanol contents were 33.53 and 39.47 ㎎/100 g for UHR and HR of Hiami, which was higher than that of Ilpum (24.33 and 28.68 ㎎/100 g). DPPH radical, hydrogen peroxide, superoxide radical and hydroxyl radical scavenging activities of 70% ethanol extracts of Hiami were higher compared to Ilpum, and UHR was higher than those of HR. Antitumor activities of the 70% ethanol extracts of Hiami and Ilpum were increased with a dose-dependent manner. The extracts of Hiami have higher activities of antitumor activities on gastric and breast cancer cell lines compared to other cancer cell lines, and Ilpum has higher activities of antitumor activities on colon and liver cancer cell lines.
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