检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]华中科技大学同济医学院教育部环境与健康重点实验室,华中科技大学同济医学院卫生毒理学系,武汉430030 [2]上海大学环境与化学学院环境污染与健康研究所 [3]福建医科大学公共卫生学院、环境与健康研究所毒理学与化学物安全性评价研究室、职业与环境卫生学系
出 处:《中华劳动卫生职业病杂志》2008年第11期654-658,共5页Chinese Journal of Industrial Hygiene and Occupational Diseases
基 金:国家自然科学基金资助项目(30371225)
摘 要:目的研究溴氰菊酯(DM)对大鼠肾上腺嗜铬细胞瘤(PC12)细胞活性氧(ROS)生成的影响。方法对培养的PC12细胞分别进行处理:(1)终浓度为0、10和100μmol/L的DM分别处理PC12细胞1、6和12h(两因素析因设计);(2)终浓度为0、10和100μmol/L的DM分别处理PC12细胞1、6、24h或24、48h;(3)PC12细胞分别在终浓度为10mmol/L乙酰半胱氨酸(NAC)预处理2h、终浓度为500μmol/L的DL-甲硫氨酸磺酰亚胺(BSO)及终浓度为40μmol/L的叔丁基对苯二酚(tBHQ)预处理16h,再给予10μmol/L DM作用6h。所有处理结束时,用2’,7’-二氯荧光黄双乙酸酯(DCFH-DA)探针法测定细胞ROS含量。结果DM诱导ROS生成呈剂量和时间效应关系。10μmol/LDM处理组PC12细胞增加ROS的DCF荧光强度,是溶剂对照组的2.24倍,差异有统计学意义(P〈0.01)。而分别用NAC、BSO及tBHQ预先处理PC12细胞均能明显降低DM所增加的ROS,分别是DM组的22%、62%、38%,差异均有统计学意义(P〈0.05)。结论DM能诱导PC12细胞ROS生成增高,胞内巯基水平和抗氧化功能降低可能是ROS生成增高的影响因素。Objective To investigate the effect of deltamethrin (DM)on production of reactive oxygen species ( ROS ) of rat pheoehromocytoma (PC 12) cells and its mechanism. Methods PC 12 cells were treated with various dose of DM (0,10 or 100 μmol/L) for 1,6 or 12 h respectively. Furthermore,PC12 cells were treated with various dose of DM (0,10 or 100 μmol/L) for 24 or 48 h, respectively. PC12 ceils were pre-incubated with 10 mmol/L N-aeetyl-L-cysteine (NAC) for 2 h,or with 500 μmol/L DL-Buthionine-[S,R]-Sulfoximine (BSO) for 16 h,or with 40 μmol/L tertiary butylhydroquinone(tBHQ) for 16 h,prior to exposure to DM and then with 10 μmol/L DM for 6 h. After treatment,ROS production in PC12 cells were measured by a molecular probe,2',7'-diehlorofluorescein diacetate (DCFH-DA). Results DM induced a dose-time dependent increase in ROS production (indicated by DCF fluorescence intensity). 10 μmol/L DM treatment for 6 h enhanced DCF fluorescence intensity that reached approximately 2.24 times of values of control group. Furthermore, a pretreatment with NAC,BSO or tBHQ significantly reduced the DM-enhanced DCF fluorescence intensity that reached approximately 22%, 62% or 38% of values of DM treatment, respectively (P〈0.05), indicating that all these pretreatments atteruate ROS production. Conclusion The in vitro studies demonstrate that DM could enhance ROS production, and may be the influential factor for the decreased mercapto level and antioxidative function.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.249