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Comparison of Diglyceride, Conjugated Linoleic Acid, and Diglyceride-Conjugated Linoleic Acid on Proliferation and Differentiation of 3T3-L1 Preadipocytes  

Jeong, Jae-Hwang (College of Liberal Arts, Seowon University)
Lee, Sang-Hwa (Department of Food and Nutrition, Seowon University)
Hue, Jin-Joo (College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungbuk National University)
Lee, Yea-Eun (College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungbuk National University)
Lee, Young-Ho (Ilshinwells Co., Ltd)
Hong, Soon-Ki (Ilshinwells Co., Ltd)
Jeong, Seong-Woon (Ilshinwells Co., Ltd)
Nam, Sang-Yoon (College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungbuk National University)
Yun, Young-Won (College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungbuk National University)
Lee, Beom-Jun (College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungbuk National University)
Publication Information
Journal of Food Hygiene and Safety / v.22, no.3, 2007 , pp. 145-150 More about this Journal
Abstract
Conjugated linoleic acid (CLA) reduces fat deposition in several mammalian species. The proposed mechanisms for this effect are reduced preadipocyte proliferation and differentiation. The objective of this study was to investigate the inhibitory effects of diglyceride (DG), CLA, DG-CLA of proliferation and differentiation of 3T3-L1 preadipocytes. Cell viability was determined using WST-8 analysis and cell differentiation was determined by glycerol-3-phosphate dehydrogenase (GPDH) activity. Lipid accumulation in differentiating 3T3-L1 cells was measured by Oil red O staining. The proliferation of preconfluent 3T3-L1 cells by treatments of DG, CLA, and DG-CLA was reduced in a dose-dependent manner. CLA among them was the most effective in reduction of viable cells with increasing concentrations. Treatments of the DG, CLA, and DG-CLA at the concentration of $100{\cdot}\ddot{I}g/ml$ for 48h significantly inhibited differentiation of 3T3-L1 cells (p<0.05). In addition. cytoplasmic lipid accumulation during differentiation of the 3T3-L1 preadipocytes was also inhibited by treatments of the test solutions. DG-CLA was the most effective in the inhibition of differentiation and lipid accumulation in 3T3-L1 cells. These results indicate that the DG including CLA as fatty acids is more effective for anti-obesity than DG or CLA alone and that consumption of DG-CLA as a dietary oil may give a benefit for controlling overweight in humans.
Keywords
conjugated linoleic acid; differentiation; diglyceride; obesity; proliferation; 3T3-L1 cells;
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