Abstract
Obesity is caused by excessive accumulation of body fat and is closely related to complex metabolic diseases. Adipogenesis is a key process that is required in adipocyte hypertrophy in the development of obesity. Curcumin (Cur) has been reported to inhibit adipocyte differentiation, but the inhibitory effects of other curcuminoids present in turmeric, such as demethoxycurcumin (DMC) and bisdemethoxycurcumin (BDMC), on adipogenesis have not been investigated. Here, we investigated the effects of curcuminoids on adipogenesis and the molecular mechanisms of adipocyte differentiation. Among three curcuminoids, BDMC was the most effective suppressor of lipid accumulation in adipocytes. BDMC suppressed adipogenesis in the early stage primarily through attenuation of mitotic clonal expansion (MCE). In BDMC-treated preadipocytes, cell cycle arrest at the G0/G1 phase was found after initiation of adipogenesis and was accompanied by downregulation of cyclin A, cyclin B, p21, and mitogen-activated protein kinase (MAPK) signaling. The protein levels of the adipogenic transcription factors peroxisome proliferator-activated receptor (PPAR)γ and CCAAT/enhancer-binding proteins (C/EBP)α were also reduced by BDMC treatment. Furthermore, 0.5% di...Continue Reading
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