瑞舒伐他汀抑制同型半胱氨酸诱导的内皮祖细胞凋亡涉及Nox4氧化应激途径

目的研究瑞舒伐他汀(Rosu)对同型半胱氨酸(Hcy)诱导的内皮祖细胞(EPCs)活性氧(ROS)产牛以及凋亡的影响。方法从外周血中分离EPCs与Hey共孵育,或经Rosu、不同的应激信号通路抑制剂甲羟戊酸(100μmlol/L)、乙酰半胱馘酸(NAC,10μmol/L)、NADPH氧化酶(Nox)抑制剂(DPI,10wmol/L)、内皮一氧化氮合成酶抑制剂(LNMA,1mmol/L)预培养后再加入Hcy共孵育。采用流式法检测细胞凋亡率,2’,7’-二氯荧光黄双乙酸盐法(H。DCF—DA)检测细胞内ROS水平,光泽精化学发光法检测Nox活性,RT—PCR检测Nox4mRNA的表达。结果Rosu...

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Published in上海交通大学学报:医学版 Vol. 33; no. 11; pp. 1436 - 1439
Main Author 鲍晓梅 郑宏超 吴春芳 陆国平
Format Journal Article
LanguageChinese
Published 2013
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ISSN1674-8115

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Summary:目的研究瑞舒伐他汀(Rosu)对同型半胱氨酸(Hcy)诱导的内皮祖细胞(EPCs)活性氧(ROS)产牛以及凋亡的影响。方法从外周血中分离EPCs与Hey共孵育,或经Rosu、不同的应激信号通路抑制剂甲羟戊酸(100μmlol/L)、乙酰半胱馘酸(NAC,10μmol/L)、NADPH氧化酶(Nox)抑制剂(DPI,10wmol/L)、内皮一氧化氮合成酶抑制剂(LNMA,1mmol/L)预培养后再加入Hcy共孵育。采用流式法检测细胞凋亡率,2’,7’-二氯荧光黄双乙酸盐法(H。DCF—DA)检测细胞内ROS水平,光泽精化学发光法检测Nox活性,RT—PCR检测Nox4mRNA的表达。结果Rosu显著抑制了Hcy诱导的ROS蓄积和EPCs凋亡,拮抗了Hcy诱导的Nox激活以及Nox4mRNA表达。Nox4siRNA转染EPCs可以产生相似的效果。结论Rosu对EPCs的保护作用口f能址通过Nox4途径抑制Hcy诱导的Nox激活、ROS蓄积和EPCs凋亡来实现。
Bibliography:BAO Xiao-mei, ZHENG Hong-chao, WU Chun-Fang, LU Guo-Ping (1. Department of Cardiology, Xuhui District Central Hospital, Shanghai 200031, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025)
rosuvastatin; homocysteine; apoptosis; reactive oxygen species; Nox4
Objective To study inhibition of rosuvastatin (Rosu) on homocysteine (Hcy) -induced reactive oxygen species (ROS) and apoptosis in endothelial progenitor cells (EPCs). Methods EPCs were isolated from peripheral blood and then incubated with Hcy, or pre-incubated with Rosu or with different stress signaling pathway inhibitors including mevalonate (100 Ixmol/L), acetyl-cysteine (NAC, 10 txmol/L), NADPH oxidase inhibitor (DPI, 10μmol/L), and endothelial nitric oxide synthase inhibitor (LNMA, 1 mmol/L) before adding Hcy. Apoptosis rate was evaluated by fluorescence activated cell sorting (FACS) analysis. ROS levels were detected by 2' , 7' -dichlorodihydrofluoresccin diacctatc ( H2DCFH-DA) . NADPH oxidases were evaluated with lucig
ISSN:1674-8115