WANG Jian-xia, ZHENG Tao, SHU Guang-wen, et al. Mechanisms and Effect of Total Saponins from on the Insulin Resistance[J]. Chinese journal of experimental traditional medical formulae, 2012, 18(20): 157-161.
WANG Jian-xia, ZHENG Tao, SHU Guang-wen, et al. Mechanisms and Effect of Total Saponins from on the Insulin Resistance[J]. Chinese journal of experimental traditional medical formulae, 2012, 18(20): 157-161.DOI:
Objective:To study the effect of total saponins from Entada phaseoloides (TSEP) on insulin resistance in type 2 diabetes rats and exploring the molecular mechanism using HepG-2 insulin resistance hepatocytes. Method: ①Type 2 diabetic rat model was established by high-fat diet and low-dose streptozotocin. Insulin tolerance test was performed to determine the effect of TSEP on insulin resistance. ②Insuin resistance in HepG-2 cells was induced by 0.25 mmol·L-1 of palmitic acid. The expression levels of protein tyrosine phosphatase-1B (PTP-1B) among different treatment groups were compared by Western blot. Result: Compared with the model group
the insulin sensitivity in the TSEP treated rats was increased. In normal HepG-2 cells
the protein levels of PTP-1B were decreased after insulin treatment. However
its expression level could not be ameliorated by TSEP. Conclusion: TSEP can improve the insulin resistance in type 2 diabetes mellitus rats. A possible mechanism underlying the insulin resistanceby TSEP in hepatocytes may be related to modulating PTP-1B expression.