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Open AccessArticle

Rice Bran Reduces Weight Gain and Modulates Lipid Metabolism in Rats with High-Energy-Diet-Induced Obesity

1
School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110, Taiwan
2
Department of Exercise and Health Science, National Taipei University of Nursing and Health Sciences, Taipei City 112, Taiwan
3
Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei 110, Taiwan
4
Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan 333, Taiwan
5
Graduate School of Agricultural Science, Tohoku University, Miyagi 980-8572, Japan
6
Faculty of Agricultural Engineering and Technology, Bogor Agricultural University, Jawa Barat 16680, Indonesia
7
Nutrition Research Center, Taipei Medical University Hospital, Taipei 110, Taiwan
8
Cell Physiology and Molecular Image Research Center, Wan Fang Hospital, Taipei Medical University, Taipei City 116, Taiwan
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Nutrients 2019, 11(9), 2033; https://doi.org/10.3390/nu11092033
Received: 9 August 2019 / Revised: 27 August 2019 / Accepted: 28 August 2019 / Published: 30 August 2019
Obesity has become an epidemic worldwide. It is a complex metabolic disorder associated with many serious complications and high morbidity. Rice bran is a nutrient-dense by product of the rice milling process. Asia has the world’s highest rice production (90% of the world’s rice production); therefore, rice bran is inexpensive in Asian countries. Moreover, the high nutritional value of the rice bran suggests its potential as a food supplement promoting health improvements, such as enhancing brain function, lowering blood pressure, and regulating pancreatic secretion. The present study evaluated the anti-obesity effect of rice bran in rats with high-energy diet (HED)-induced obesity. Male Sprague–Dawley rats were randomly divided into one of five diet groups (n = 10 per group) and fed the following for eight weeks: Normal diet with vehicle treatment, HED with vehicle, rice bran-0.5X (RB-0.5X) (2% wt/wt rice bran), RB-1.0X (4% wt/wt rice bran), and RB-2.0X (8% wt/wt rice bran). Rice bran (RB-1.0X and RB-2.0X groups) markedly reduced obesity, including body weight and adipocyte size. In addition, treating rats with HED-induced obesity using rice bran significantly reduced the serum uric acid and glucose as well as the liver triglyceride (TG) and total cholesterol (TC). Furthermore, administration of an HED to obese rats significantly affected hepatic lipid homeostasis by increasing phosphotidylcholine (PC; 18:2/22:6), diacylglycerol (DG; 18:2/16:0), DG (18:2/18:1), DG (18:1/16:0), cholesteryl ester (CE; 20:5), CE (28:2), TG (18:0/16:0/18:3), and glycerol-1-2-hexadecanoate 3-octadecanoate. However, the rice bran treatment demonstrated an anti-adiposity effect by partially reducing the HED-induced DG (18:2/18:1) and TG (18:0/16:0/18:3) increases in obese rats. In conclusion, rice bran could act as an anti-obesity supplement in rats, as demonstrated by partially reducing the HED-induced DG and TG increases in obese rats, and thus limit the metabolic diseases associated with obesity and the accumulation of body fat and hepatic lipids in rats. View Full-Text
Keywords: high-energy diet (HED); lipid metabolism; lipidomics; obesity; rice bran high-energy diet (HED); lipid metabolism; lipidomics; obesity; rice bran
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Yang, S.-C.; Huang, W.-C.; Ng, X.E.; Lee, M.-C.; Hsu, Y.-J.; Huang, C.-C.; Wu, H.-H.; Yeh, C.-L.; Shirakawa, H.; Budijanto, S.; Tung, T.-H.; Tung, Y.-T. Rice Bran Reduces Weight Gain and Modulates Lipid Metabolism in Rats with High-Energy-Diet-Induced Obesity. Nutrients 2019, 11, 2033.

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