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http://dx.doi.org/10.3746/jkfn.2016.45.9.1239

Effect of Pumpkin, Corn Silk, Adzuki Bean, and Their Mixture on Weight Control and Antioxidant Activities in High Fat Diet-Induced Obesity Rats  

Park, Jae-Hee (Department of Food, Nutrition and Biotechnology, Kyungnam University)
Lee, Eunji (Department of Food, Nutrition and Biotechnology, Kyungnam University)
Park, Eunju (Department of Food, Nutrition and Biotechnology, Kyungnam University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.45, no.9, 2016 , pp. 1239-1248 More about this Journal
Abstract
Pumpkin juice (PJ), corn silk tea (CT), and adzuki bean tea (AT) have long been used for treatment of obesity in Korea. This study investigated the efficacy of PJ, CT, AT, and their mixture (PCA) on alteration of body weight and antioxidant metabolism in high-fat diet (HFD)-induced obese rats. After being fed HFD for 4 weeks, SD rats were divided into six groups fed a normal diet (ND), HFD, HFD+PJ [250 mg/kg body weight (BW)], HFD+CT (250 mg/kg BW), HFD+AT (250 mg/kg BW), and HFD+PCA (PJ : CT : AT=1:1:1, 250 mg/kg BW) for another 9 weeks. HFD consumption resulted in total lipid, triglyceride, and total cholesterol accumulation in adipose tissue, which was reduced by administration of PJ, CT, AT, or PCA. The plasma oxygen radical absorbance capacity value and hepatic glutathione peroxidase activity significantly increased compared to the HFD group. The liver thiobarbituric acid reactive substances was significantly lower in the PCA group than the HFD group. HFD-induced DNA damage in hepatocytes, as measured by comet assay, decreased in the PJ, AT, and PCA-supplemented groups. The PCA group exerted a superior antigenotoxic effect compared to other treatments. PCA recovered the concentration of plasma adiponectin, which was reduced by HFD. Adipocyte surface area (%) was significantly higher in the HFD group than the ND group, significantly lower in the PJ and PCA groups than the HFD group, and not significantly different compared with the ND group. Based on the results, supplementation of PJ, CT, AT, and PCA exhibited lipid-lowering effects in adipocytes of HFD-induced obese rats. Furthermore, the PCA group exhibited superior antioxidant activity in all treated groups. This study suggests that a mixed beverage consisting of PJ, CT, and AT may be a significant source of natural antioxidants, which might be helpful in preventing obesity and progress of various oxidative stresses induced by HFD.
Keywords
diet-induced obese; pumpkin; corn silk; adzuki bean; physiological activity;
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