NADPH氧化酶4在高糖促进HUVECs内活性氧产生机制中的作用

目的：研究在高浓度葡萄糖刺激状态下，人脐静脉内皮细胞（HUVECs）内活性氧的主要来源。方法：Ⅱ型胶原酶消化法分离培养人脐静脉内皮细胞，流式细胞术检测细胞内活性氧的生成，RT-PCR及Western blot检测细胞内NADPH氧化酶4（NOX4）的表达。结果：高糖处理HUVECs后细胞内ROS升高、NOX4表达明显上调；NOX抑制剂DPI能够抑制NOX4表达的上调和细胞内ROS的升高。结论：高糖处理HUVECs时细胞内ROS升高主要来源于NOX4。

The role of NADPH oxidase in intracellular ROS generation stimulated by high concentration of glucose

Objective： To study the main source of ROS generated in human umbilical vein endothelial cells （HUVECs） while stimulated by high concentration of glucose.Methods：Human umbilical vein endothelial cells was isolated by type Ⅱ collagenase, Intracellular ROS generation was measured by flow cytometry, NOX4 expression in HUVECs was detected by RT-PCR and Western blot.Results：High concentration of glucose could increase ROS generation and NOX4 expression; DPI, the specially inhibitor of NADPH oxidase, could attenuated these effects. Conclusion：NOX4 was the main source of ROS generation in HUVECs cultured with high concentration of glucose.