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http://dx.doi.org/10.3746/jkfn.2014.43.3.333

Development of Lotus Root Bugak with Plasma Lipid Reduction Capacity by Addition of Opuntia ficus-indica var. saboten or Green Tea as a Coloring Agent  

Kim, Mijeong (Dept. of Food Science and Nutrition, and Kimchi Research Institute Pusan National University)
Hong, Sun Hee (Dept. of Food Science and Nutrition, and Kimchi Research Institute Pusan National University)
Chung, Lana (College of Hotel and Tourism Management, Kyunghee University)
Choe, Eunok (Dept. of Food and Nutrition, Inha University)
Song, Yeong-Ok (Dept. of Food Science and Nutrition, and Kimchi Research Institute Pusan National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.43, no.3, 2014 , pp. 333-340 More about this Journal
Abstract
The purpose of this study was to develop functional lotus root bugak with plasma lipid reduction capacity by controlling the color of batter used for bugak preparation. Lotus root, nearly colorless, was selected to observe color effects. Gardeniae fructus (GF), Opuntia ficus-indica var. saboten (OF), and green tea (GT), which are colored yellow, red, and green, respectively, were used as coloring agents. Fermented glutinous rice was prepared naturally during winter season by placing glutinous rice and water (1:2, w/w) together in a crock pot for 7 days. Coloring materials (10%, w/w) were blended with glue made from fermented glutinous rice flour to prepare the batter. Cooked lotus root was then mixed with a 1.1-fold amount of batter (w/w) and dried at room temperature. Lotus root bugak (LRB) is pan-fried with un-roasted sesame oil, which is traditionally used as frying oil in Korea. Low-density lipoprotein receptor knockout ($LDLr^{-/-}$) mice (n=36) were fed an atherogenic diet (AD) containing various types of LRB (10 g%) for 10 weeks. Plasma triglyceride, total cholesterol, and LDL-C concentrations decreased significantly in mice fed LRB prepared with OF batter (OFB) and GT batter (GTB) (P<0.05). Protein expression levels of fatty acid synthase (FAS) and 3-hydroxyl-3-methylglutaryl coenzyme A reductase (HMGCR) in the OFB and GTB groups were suppressed compared with the LRB group (P<0.05). In accordance with the results on FAS and HMGCR expression, sterol regulatory element binding protein-I and II (SREBP-I and II), which are responsible for the regulation of FAS and HMGCR gene expression, respectively, were down-regulated compared to the LRB group (P<0.05). In conclusion, the plasma lipid reduction activities of OFB and GTB could be mediated through down-regulation of FAS and HMGCR mRNA expression via suppression of regulatory molecules, SREBP-I and II, in $LDLr^{-/-}$ mice.
Keywords
bugak; Opuntia ficus-indica var. saboten; green tea; HMGCR; SREBPs;
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Times Cited By KSCI : 1  (Citation Analysis)
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