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Astilbe chinensis Franch. et Savat. (AC) has been used in traditional medicine for the treatment of chronic bronchitis, arthralgia, and gastralgia. In this study, we investigated the antiobesity effect of AC extract on 3T3-L1 preadipocytes and high-fat-diet-fed C57BL/6N obese mice. We found that AC extracts dramatically decreased the lipid content of 3T3-L1 cells in a concentration-dependent manner without cytotoxicity. The action mechanism of AC extract was demonstrated to be the inhibition of lipid accumulation and dose-dependent decrease in the expression of CCAAT/enhancer-binding protein α (C/EBPα), peroxisome proliferator-activated receptor-γ (PPAR-γ), and sterol regulatory element-binding protein 1 (SREBP1). Furthermore, AC extract increased the mitochondrial phosphorylation of AMP-activated protein kinase (AMPK) and acetyl-CoA carboxylase (ACC), mitochondrial biogenesis, and lipolysis-related factors. In amice model of high-fat-diet-induced obesity, the mice administered AC extract experienced significant decrease of 64% in weight gain, 55% in insulin resistance index, 22% in plasma triglycerides (TG), 56% in total cholesterol (TC), and 21% in nonesterified fatty acid (NEFA) levels compared with those in the high-fat diet-fed control mice. Collectively, these results indicated that AC extract exerted antiobesogenic activity through the modulation of the AMPK signaling pathway, inhibition of adipogenesis, decreased lipid content, and reduced adipocyte size.

evidence-based complementary and alternative medicine

Antiobesity Effect of Astilbe chinensis Franch. et Savet. Extract through Regulation of Adipogenesis and AMP-Activated Protein Kinase Pathways in 3T3-L1 Adipocyte and High-Fat Diet-Induced C57BL/6N Obese Mice