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Bioactive Compounds and Antioxidant and Antiproliferative Activities of Korean White Lotus Cultivars
박용서,Korsak Towantakavanit,Teresa Kowalska,Soon-Teck Jung,함경식,Buk-Gu Heo,Ja-Yong Cho,Jae-Gill Yun,김현주,Shela Gorinstein 한국식품영양과학회 2009 Journal of medicinal food Vol.12 No.5
In traditional Korean medicine, lotus (Nelumbo nucifera Gaertn) roots have been used as an antidiabetic and an antiproliferative remedy. However, scientific publications on lotus properties are very limited. Therefore, it was decided to investigate the Korean white lotus cultivars in order to find out their bioactivity. It was found that all lotus cultivars (Inchisa, Muan, Garam, and Chungyang) possess high amounts of bioactive compounds: total phenols, between 7.95±0.8 and 4.21±0.3mg of gallic acid equivalents (GAE)/g dry weight (DW); ascorbic acid, between 15.8±1.1 and 22.3±1.7mg of ascorbic acid/g DW; and amino acids, between 15.05±0.82% and 16.62±0.90% DW. The highest contents of polyphenols (7.95±0.8mg of GAE/g DW) and the highest levels of antioxidant [by 2,2-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) and 1,1-diphenyl-2-picrylhydrazyl assays, 54.27±6.1 and 21.98±2.5μM Trolox equivalents/g DW, respectively] and antiproliferative activities on both human cancer cell lines (Calu-6 for human pulmonary carcinoma and SMU-601 for human gastric carcinoma, 59.75±3.99% and 71.21±2.79% cell viability, respectively) were found in the Chungyang cultivar. Fluorometry and Fourier transform infrared spectroscopy can be applied as rapid methods for determination of bioactive compounds, such as polyphenols. The correlation between the bioactive compounds and the antioxidant activity was high. In conclusion, all Korean white lotus cultivars are valuable medicinal foods, and in order to receive the best results a combination of lotus cultivars has to be consumed.
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