Oleanolic acid and its derivatives: New inhibitor of protein tyrosine phosphatase 1B with cellular activities
作者:Yi-Nan Zhang、Wei Zhang、Di Hong、Lei Shi、Qiang Shen、Jing-Ya Li、Jia Li、Li-Hong Hu
DOI:10.1016/j.bmc.2008.07.080
日期:2008.9
Protein tyrosine phosphatase 1B is a key factor in the negative regulation of insulin pathway and a promising target for treatment of diabetes and obesity. Herein, a series of competitive inhibitors were optimized from oleanolic acid, a natural triterpenoid identified against PTP1B by screening libraries of traditional Chinese medicinal herbs. Modifying at 3 and 28 positions, we obtained compound 13
酪氨酸磷酸酶1B蛋白是胰岛素通路负调节的关键因素,也是治疗糖尿病和肥胖症的有希望的靶标。本文中,通过筛选传统中草药文库中鉴定出的针对PTP1B的天然三萜类化合物齐墩果酸,优化了一系列竞争性抑制剂。在3和28位上进行修饰,我们获得了K(i)为130 nM的化合物13,该化合物在除T细胞蛋白酪氨酸磷酸酶以外的其他与胰岛素途径有关的磷酸酶之间表现出良好的选择性。在细胞模型中的进一步评估表明,这些衍生物增强了CHO / hIR细胞中胰岛素受体的磷酸化作用,并刺激了添加或不添加胰岛素的L6肌管中的葡萄糖摄取。