摘要
目的:研究尼古丁对人脐静脉内皮细胞(HUVECs)释放组织型纤溶酶原激活物(t-PA)和纤溶酶原激活物抑制物-1(PAI-1)的影响。方法:HUVECs培养后接种于24孔培养板中,随机分为对照组及实验组,分别进行以下实验。(1)以0.1、1、10、100μmol/L尼古丁孵育HUVECs,12h后收集各组上清液;(2)以100μmol/L尼古丁与HUVECs孵育0、4、6、8、12及24h,收集各组上清液。采用ELISA法测定各组t-PA和PAI-1的浓度。结果:HUVECs与不同浓度尼古丁孵育12h后,100μmol/L尼古丁组PAI-1蛋白较对照组明显增加(P<0.01);0.1、1及10μmol/L尼古丁组PAI-1蛋白与对照组比较,均无显著差异(均P>0.05);各浓度组t-PA蛋白与对照组比较,均无显著差异(均P>0.05)。HUVECs与100μmol/L的尼古丁分别孵育4、6、8、12及24h,各组PAI-1蛋白均较对照组明显升高(P<0.05),且其升高呈时间依赖性;各组t-PA与对照组比较,均无显著差异(均P>0.05)。结论:尼古丁可抑制HUVECs的纤溶活性,对内皮细胞具有损伤作用。
AIM： To study the effect of nicotine on the release of tissue plasminogen activator （t-PA） and plasminogen activator inhibitor-1 （PAI-1） in human umbilical vein endothelial cells （HUVECs）.METHODS： HUVECs were cultured in 24-well tissue-culture plates and randomly divided into control group and nicotine treatment groups. In nicotine treatment groups, HUVECs were either incubated with nicotine at the concentrations of 0.1, 1, 10 and 100 μmol/L for 12 h, or exposed to 100 μmol/L nicotine for 0 h, 4 h, 6 h, 8 h, 12 h and 24 h. The cells in control group were exposed to the same volume of PBS instead of nicotine at corresponding time points. The supernatants were collected for determining the concentrations of t-PA and PAI-1 by ELISA. RESULTS： （1） Compared with control group, the protein levels of PAI-1 in 100 μmol/L nicotine treatment group increased significantly （P〈0.01）. No significant difference of t-PA protein among the groups was observed （P〉0.05）. （2） After stimulated with 100 μmol/L nicotine for 4 h, 6 h, 8 h, 12 h and 24 h, the protein levels of PAI-1 in the cells increased over time and reached the peak at 12 h, which was significantly higher than those in the control cells （P〈0.05）. However, no significant difference of t-PA protein in these cells was found as compared to the controls （P〉0.05）.CONCLUSION： Nicotine inhibits the fibrinolytic activity in HUVECs in vitro, thereby damaging the vascular endothelial cells.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2010年第11期2253-2255,共3页
Chinese Journal of Pathophysiology
基金
太原市科技兴市资助项目(No.0904051)
