洛伐他汀对人血管内皮细胞双向调节作用的实验研究

目的 探讨洛伐他汀对人血管内皮细胞的调节作用及其浓度相关性.方法 配制含不同浓度洛伐他汀的培养基(0.001、0.01、0.1、1、10μmol/L),分别于96孔板中进行人脐静脉内皮细胞(human umbilical vein endothelial cells,HUVECs)培养,在培养24、72、120 h后以噻唑蓝比色法(MTT)法进行细胞活性及增殖情况评估.将HUVECs接种于6孔板中,分别加入含上述不同浓度洛伐他汀的培养基,培养24 h后,消化细胞,计数,按照2×104/ml每孔接种在24孔板中,30 min后,洗掉尚未黏附的细胞,将余下的细胞每孔随机选一个视野,在200×视野中计量黏附细胞数,比较各组细胞的黏附情况. 结果培养24 h,0.01、0.1μmol/L的洛伐他汀对HUVECs存在明显的促进增殖作用;培养72 h,1μmol/L的洛伐他汀对HUVECs存在明显的促进增殖作用;培养120 h,0.001、0.01、0.1、1 μmol/L的洛伐他汀与对照组相比HUVECs增殖活性差异无统计学意义,10μmol/L的洛伐他汀表现出明显的增殖抑制作用.洛伐他汀与HUVECs作用24 h后,0.1、1μmol/L的洛伐他汀表现出明显的促进HUVECs黏附作用.结论 洛伐他汀对人血管内皮细胞存在双向调节作用,与浓度相关.体外浓度0.1、1μmol/L时可以表现出明显的促进增殖及黏附作用,浓度达10 μmol/L时则表现出抑制作用.

An in-vitro study of Lovastatin's biphasic effects on proliferation and adhesion of human umbilical vein endothelial cells

Objective To investigate Lovastatin's effects on proliferation and adhesion of human umbilical vein endothelial cells (HUVECs). Methods Culture medium with different concentration of Lovastatin(0.001、0.01、0.1、1.0、10μmol/L) was prepared, HUVECs was cultured in 96 well-plate with the different medium. AT the point of 24,72 and 120 h, the cell's activity and quantity was assessed by MTT. HUVECs was cultured with Lovastatin in 6 well-plate for 24 hours, then collected the cells by trypsin digestion. The cells were seeded in 24 well-plate with 2×104/ml and adhering for 30 mins. Then counting the adhered cells in different wells. Results At 24 h, Lovastatin (0.01、 0.1 μmol/L ) promoted proliferation of HUVECs ( P ＜ 0.05 ); at 72 h, Lovastatin ( 1.0μmol/L) was positive accelerating cell growth(P＜ 0.05 ). While Lovastatin ( 10μmol/L) inhibited the proliferation significantly ( P ＜0.05 ) at 120 h. As HUVECs was cultured with Lovastatin for 24 hours, Lovastatin (0.1、1μmol/L) inhanced the adhesion capability of HUVECs significantly( P＜ 0.05 ). Conclusion Lovastatin had biphasic effects on proliferation and adhesion of HUVECs dependent on the concentration. Lovastatin (0.1、1.0 μmol/L) could promote the proliferation and adhesion, while at higher concentration ( 10.0μmol/L) it inhibits cell proliferation and adhesion.