硒化合物对人脐带间充质干细胞ROS和NO生成及NOS活性的影响  

Effect of selenium compounds on ROS and NO production and NOS activity in human umbilical cord mesenchymal stem cells

在线阅读下载全文

作  者:邹颖[1,2] 凌钦婕[1] 刘秋英[3,4] 张逸波[1] 高冬芳[1] 陆俏颖[1] 刘杰[2] 郑文杰[2] 黄峙[1] 

机构地区:[1]暨南大学生命科学技术学院生物系,广东广州510632 [2]暨南大学生命科学技术学院化学系,广东广州510632 [3]暨南大学生命科学技术学院 [4]暨南大学生物医药研究开发基地,广东广州510632

出  处:《中国病理生理杂志》2010年第12期2363-2367,共5页Chinese Journal of Pathophysiology

基  金:国家自然科学基金资助项目(No.20975045;No.20675045);广东省自然科学基金资助项目(No.8251063201000008);广东省科技攻关重点资助项目(No.2008A030201020)

摘  要:目的:通过观察不同的硒化合物对人脐带间充质干细胞(MSCs)一氧化氮(NO)、活性氧(ROS)的生成及一氧化氮合酶(NOS)活性的影响,初步探讨硒的免疫调节作用机制。方法:在MSCs培养的过程中,分别添加0.1μmol/L和0.5μmol/L亚硒酸钠[Se(Ⅳ)]、硒代胱氨酸(Se-Cys)、纳米硒(Nano-Se),采用硝酸还原酶法检测24 h和48 h MSCs NO和NOS活性的变化,通过DCFH-DA荧光探针检测细胞内ROS。结果:在24 h,对照组、0.1μmol/L和0.5μmol/L Se(Ⅳ)处理MSCs的NO水平分别是(18.13±6.80)μmol/L、(20.93±5.68)μmol/L和(16.73±5.03)μmol/L。在48 h,0.1μmol/L和0.5μmol/L Se(IV)处理MSCs的NO水平分别是(17.20±9.11)μmol/L(P<0.05)和(9.98±4.35)μmol/L(P<0.01),明显低于对照组的(26.23±4.35)μmol/L。Se(IV)对ROS和NOS有明显的抑制作用,Se-Cys和Nano-Se对NO、ROS的生成和NOS活性没有明显影响。结论:Se(Ⅳ)对MSCs NO、ROS的生成和NOS活性有明显的抑制效应。AIM:To investigate the effects of selenium(Se) compounds on the generation of nitric oxide(NO) and reactive oxygen species(ROS),and the activity of nitric oxide synthase(NOS) in umbilical cord mesenchymal stem cells(MSCs).METHODS: MSCs were cultured in the medium of DMEM/F12 containing 10% FBS and exposed to the compounds of selenium [Na2SeO3,Se(IV)],selenocysteine(Se-Cys) or nano-selenium(Nano-Se) at concentrations of 0.1 μmol/L to 0.5 μmol/L.The concentration of NO and the activity of NOS in treated MSCs were detected by the method of nitrate reductase assay.The fluorescent intensity of ROS was determined by DCFH-DA probe.RESULTS: The production of NO was(18.13±6.80) μmol/L in the control MSCs,(20.93±5.68) μmol/L in the MSCs treated with Se(Ⅳ) at concentration of 0.1 μmol/L and(16.73±5.03) μmol/L in the MSCs treated with Se(Ⅳ) at concentration of 0.5 μmol/L for 24 h.The production of NO was(17.20±9.11) μmol/L(P0.05) in the MSCs treated with Se(IV) at concentration of 0.1 μmol/L and(9.98±4.35) μmol/L(P0.01) in the MSCs treated with Se(IV) at concentration of 0.5 μmol/L for 48 h,which was significantly lower than that in the control MSCs [(26.23±4.35) μmol/L].No inhibitory effect of Nano-Se and Se-Cys on the production of NO in MSCs was observed.Compared with the control MSCs,Se(Ⅳ) at concentrations of 0.1 μmol/L and 0.5 μmol/L significantly inhibited the generation of ROS and the activity of NOS in MSCs at 24 h and 48 h.CONCLUSION: Se(Ⅳ) inhibits NO/ROS production and NOS activity in a dose-dependent manner in MSCs.

关 键 词:间充质干细胞 硒化合物 一氧化氮 一氧化氮合酶 活性氧 

分 类 号:R363[医药卫生—病理学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象