摘要
目的研究昆虫变态激素蜕皮甾酮(EDS)是否能抑制内皮细胞的凋亡。方法采用亚砷酸钠(Ars)致培养内皮细胞凋亡的模型,流式细胞术测定内皮细胞的凋亡细胞数、细胞间粘附因子-1及氧化状态,观察EDS对内皮凋亡的影响。结果40、80、160 mmol/L剂量的Ars均可引起培养内皮细胞凋亡数目增加,以160 mmol/L剂量的Ars的作用最强。EDS可影响Ars诱导的内皮细胞凋亡:50、200 mg/L EDS减少Ars诱导的内皮细胞凋亡,而800 mg/L EDS却增加内皮细胞凋亡。EDS(50、200 mg/L)还可减少Ars所致的细胞间粘附分子增加,但不能显著升高Ars所致的内皮细胞氧化状态降低(P>0.05)。结论Ars可剂量依赖地诱导内皮细胞凋亡;EDS能剂量依赖地影响Ars诱导的内皮细胞凋亡;EDS(50、200 mg/L)能减少内皮细胞的凋亡细胞数和细胞间粘附分子表达量,从而表现出对内皮细胞凋亡的保护作用。
Objective To study whether ecdysterone (EDS) inhibits apoptosis of endothelial cells. Methods In the model of sodium arsenite (Ars)-induced endothelial cell apoptosis, the effect of EDS at varied dosages (50, 200, 800 mg/L) on cell apoptosis was observed by measuring the number of apoptotic endothelial cells, intracellular adhesion molecule-1 (ICAM-1) and the oxidative state (OS). Results Ars at the dosages of 40, 80, 160 mmol/L was capable of causing an increase in the number of apoptotic endothelial cells in vitro, and 160 mmol/L Ars exhibited the strongest effect. EDS was shown to exert influence on the apoptosis-inducing effect of Ars, which decreased the apoptotic cell number at the dosage of 50 and 200 mg/L, but a contrary effect occurred while at the dosage of 800 mg/L. Meanwhile EDS (50, 200 mg/L) inhibited the increase of ICAM-1 expression in the endothelial cells in response to Ars, but failed to significantly elevate the low OS induced by Ars (P>0.05). Conclusions Ars induces endothelial cell apoptosis dose-dependently, and in a similar manner, EDS produces influence on the apoptosis-inducing action of Ars. EDS (50, 200 mg/L) may decrease the apoptotic endothelial cell number and lower the Ars-induced increase of ICAM-1 expression, demonstrating its protective effect on the endothelial cells against apoptosis.
出处
《第一军医大学学报》
CSCD
北大核心
2003年第11期1219-1221,共3页
Journal of First Military Medical University
关键词
蜕皮甾酮
亚砷酸钠
内皮细胞
保护作用
细胞凋亡
流式细胞术
ecdysterone
endothelial cells
cell apoptosis
flow cytometry
intracell adherent molecule
oxidative state
sodium arsenite
