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        Antiadipogenic Effects and Mechanisms of Combinations of Genistein, Epigallocatechin-3-Gallate, and/or Resveratrol in Preadipocytes

        Bulbul Ahmed,Siqin Liu,Hongwei Si 한국식품영양과학회 2017 Journal of medicinal food Vol.20 No.2

        Natural bioactive compounds are considered an excellent alternative strategy for developing effective, safe, and cost-effective antiobesity agents. The aim of this study was to investigate if combinations of soy bean genistein (G), green tea epigallocatechin-3-gallate (E), and/or grape resveratrol (R) at low dosages synergistically inhibit preadipocyte differentiation both in 3T3-L1 cells and human primary preadipocytes (HPAs). Our results show that combinations of G, E, and/or R additively inhibited preadipocyte differentiation (39–56% of control) both in 3T3-L1 cells at 30 μM and HPAs at 15 μM, while the individual compounds have no antiadipogenic effect at the selected concentrations. We also observed similar patterns that combinations of G, E, and/or R additively reduced protein expressions of peroxisome proliferator-activated receptor gamma (PPAR-γ) and CCAAT binding proteins alpha (C/EBP-α), the two key preadipocyte differentiation regulators, both in differentiated 3T3-L1 cells and HPAs. Moreover, combined G, E, and/or R attenuated protein expressions of fatty acid binding protein 4 and perilipin, two PPAR-γ/C/EBP-α downstream molecules in fat drop development in a very similar pattern, in inhibiting differentiation in preadipocytes. This combined antiadipogenic effect of G + E + R is additive, not synergistic according to our results and the Median-Effect Principle. In addition, we found that a lower concentration (15 μM) of G, E, and/or R is required in HPAs than the concentration (30 μM) needed in 3T3-L1 cells, to exert the combined antiadipogenic effect. These data suggest that combinations of G, E, and/or R intake or soy bean, green tea, and/or grape simultaneous consumption may prevent obesity in human being.

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