RSK2激酶小分子抑制剂的设计、合成和构效关系分析(英文)

通过对基于配体的虚拟筛选方法获得的先导化合物的结构优化,设计、合成了一系列苯甲酰肼衍生物,通过1HNMR、13CNMR和MS确定了化合物结构。生物活性测试表明,该系列化合物对RSK2激酶有中等程度的抑制作用。初步揭示了抑制RSK2活性的构效关系,并通过模建的RSK2氮端三维结构揭示了该系列化合物抑制RSK2的作用机制。     

Pravastatin induces rat aortic endothelial cell proliferation and migration via activation of PI3K/Akt/mTOR/p70 S6 kinase signaling

The HMG-CoA reductase inhibitors (statins) have been shown to exert several vascular protective effects that are not related to changes in cholesterol profile, and these effects of statins are partly caused by the activation of angiogenesis. Endothelial cell (EC) proliferation and migration are crucial events for angiogenesis and statins are known to enhance these events. However, the molecular mechanism by which statins promote EC proliferation and migration is not fully understood. In this study, we show Akt and its downstream target mammalian target of rapamycin (mTOR) play an important role in pravastatin-induced EC proliferation and migration. We found that pravastatin significantly enhanced the proliferation and migration of rat aortic endothelial cells (rAECs). The addition of pravastatin to rAECs resulted in rapid phosphorylation of Akt and p70 S6 kinase (p70S6K). LY294002, a specific inhibitor of phosphatidylinositol 3-kinase (PI3K), blocked both Akt and p70S6K phosphorylation, whereas rapamycin, a specific inhibitor of mTOR, suppressed only p70S6K phosphorylation induced by pravastatin. Furthermore, both LY294002 and rapamycin inhibited pravastatin-induced rAEC proliferation and migration. Taken together, our findings indicate that pravastatin activates PI3K/Akt/mTOR /p70S6K signaling in this sequential manner and this pathway contributes to pravastatin-induced rAEC proliferation and migration.