相关靶点 |
作用机制 INSR激动剂 [+1] |
在研机构 |
原研机构 |
非在研适应症- |
最高研发阶段临床前 |
首次获批国家/地区- |
首次获批日期1800-01-20 |
The antihyperglycemic activity of extracellular polysaccharopeptides (ePSP) obtained from <i>Trametes versicolor </i>(TV) strain LH-1 has been demonstrated in hepatic cells and diabetic animals. This study further investigated the mechanisms of <i>T. versicolor</i>-ePSP on regulating glucose metabolism, including insulin signaling molecules and glucose metabolism-associated enzymes, in the liver of rats with type 2 diabetes mellitus (T2DM). Male Wistar rats, fed with a high-fat diet followed by a streptozotocin injection to induce T2DM, were orally administered water or <i>T. versicolor</i>-ePSP at doses of 0.1, 0.5, or 1.0 g/kg/d. After 4 weeks of <i>T. versicolor</i>-ePSP administration, T2DM rats exhibited significantly lower postprandial blood glucose levels, decreased liver triglyceride and cholesterol contents, and improved serum liver function indices in a dose-dependent manner (<i>P</i> < 0.05, one-way ANOVA). Additionally, T2DM rats administered <i>T. versicolor</i>-ePSP had significantly activated insulin receptors and decreased proteins involved in insulin signaling pathway, such as insulin receptor substrates, PI3K, and total and activated Akt, and AMP-activated protein kinase in the liver. <i>T. versicolor</i>-ePSP administration, especially at 1.0 g/kg per day, significantly increased glucose transporters in the cell membrane and decreased glucokinase and glucose-6-phosphotase in the cytosol of the liver. In conclusion, the antihyperglycemic activities of <i>T. versicolor</i>-ePSP may be associated with enhanced hepatic function, alleviated gluconeogenesis, and facilitated glucose transport in an insulin- and AMPK-independent manner in the liver of T2DM rats.