Abstract
D-chiro-Inositol (DCI) is a natural cyclohexanol isomer that widely exists in all living beings, which can effectively prevent glucose and lipid metabolism disorders in mammals. This study revealed the DCI elevated adiponectin levels to reduce obesity and hepatic lipid deposition in high-fat diet (HFD) fed mice. Twelve weeks of DCI supplementation (50 and 100 mg per kg body weight per day) lowered body weight and serum triglyceride, total cholesterol, insulin, and fasting glucose levels. Histopathology analysis revealed that DCI inhibited hepatic steatosis and adipocyte expansion. Remarkably, DCI significantly increased serum adiponectin levels and upgraded the expressions of adiponectin receptors (AdipoR1 and AdipoR2) in the liver. The results of western blot and qRT-PCR showed that DCI impeded the inhibitory effect of HFD on liver AMPKα and PPARs activities through activating AdipoRs and regulated downstream fatty acid metabolism. In addition, we analyzed the concentration difference of DCI in mouse liver and adipose tissue by the HRLC-MS/MS technology, indicating the preference of DCI in different tissues. Therefore, DCI relieved liver lipid deposition and hyperlipidemia potentially by promoting adiponectin synthesis in white adipose tissue and activating the AdipoR-AMPKα/PPARs pathway in the liver.
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