柚皮苷对高糖引起血管内皮损伤的保护作用与CX3 CL1及抗氧化有关

摘要

Aim To study the protective effect of the naringin on chemotactic factor CX3 CL1 of human umbilical vein endothelial cells ( HUVEC) induced by high glucose. Methods The effect of different concen-trations of naringin on HUVEC cell viability was deter-mined by MTS. HUVECs were divided into 4 groups:① control group, ② high glucose group, ③ naringin group and④high glucose treated with naringin group. After treatment for 5 days, the concentration of nitric oxide ( NO ) in the culture medium was measured by nitrate reductase; intracellular reactive oxygen species ( ROS) was analyzed with fluorescence probe; the ex-pressions of CX3 CL1 mRNA and protein were deter-mined by the reverse transcription PCR ( RT-PCR ) and Western blot ( WB ) . Results NO content in the culture medium of high glucose group was markedly de-creased, which could be increased by naringin. Com-pared with the control group, intracellular ROS in the high glucose group was drastically elevated, but narin-gin decreased the elevated ROS induced by high glu-cose. The results of RT-PCR and WB showed that nar-ingin could downregulate the increased expressions of CX3CL1 mRNA and protein induced by high glucose. Conclusion Naringin has protective effect on the in-jury of the HUVEC induced by high glucose, which is associated with reducing the expression of CX3 CL1 and the antioxidative and anti-inflammatory action.%目的：研究柚皮苷(naringin,Nar)对趋化因子CX3CL1参与的慢性高糖诱导的人脐静脉血管内皮细胞( HUVEC)损伤机制的保护作用。方法 MTS法测定不同浓度的柚皮苷对正常HUVEC的活性影响,及不同葡萄糖浓度下对HUVEC的损伤程度。实验分为对照组( Ctrl)、柚皮苷组( Nar)、高糖组( HG)和高糖加柚皮苷组( HG+Nar)4组。细胞经各种条件处理5d后,硝酸还原酶法测定细胞上清液中一氧化氮(NO)含量,多功能酶标仪测定细胞内活性氧(ROS)含量, RT-PCR和Western blot检测CX3CL1 mRNA和蛋白的表达。结果高糖组与正常对照组相比NO水平明显降低,ROS含量则明显升高,高糖处理后加入柚皮苷能增加NO的产生,同时降低细胞内ROS含量,柚皮苷组与对照组之间差异无显著性。 RT-PCR和Western blot结果显示柚皮苷可以降低高糖组CX3CL1 mRNA和蛋白的表达,柚皮苷组与对照组相比无显著性差异。结论柚皮苷对趋化因子CX3CL1参与的慢性高糖引起的HUVEC损害具有保护作用,且其保护作用可能与其抗氧化应激及抗炎作用有关。