北京奥运大气污染控制措施对大气细颗粒物金属组分及其细胞毒性的影响

被引:6
作者
魏红英
邓芙蓉
郭新彪
机构
[1] 北京大学医学部公共卫生学院
关键词
空气污染; 细颗粒物; 细胞毒性; 金属元素; 膜毒性;
D O I
10.16241/j.cnki.1001-5914.2011.10.013
中图分类号
R122.2 [空气与卫生];
学科分类号
摘要
目的探讨2008北京奥运相关大气污染控制措施对大气细颗粒物(PM2.5)金属组分及其细胞毒性的影响。方法于2008年采集奥运前与奥运期间PM2.5,以电感耦合等离子体质谱仪和发射光谱仪测定PM2.5中金属元素含量。以不同浓度的两种PM2.5处理人肺腺癌A549细胞24 h,观察PM2.5对细胞膜通透性、线粒体琥珀酸脱氢酶(SDH)活力及溶酶体酸性磷酸酶(ACP)漏出的影响。结果奥运期间PM2.5元素含量大多低于奥运前PM2.5。与对照组相比,奥运前与奥运期间PM2.5在5、25和125μg/ml染毒组中的线粒体SDH活力下降,溶酶体ACP漏出增加(P<0.05);奥运前与奥运期间PM2.5在25和125μg/ml染毒组中的细胞膜通透性增加(P<0.05)。与奥运前相比,奥运期间PM2.5在25和125μg/ml组中对细胞膜通透性的影响较小(P<0.05)。结论北京奥运相关大气污染控制措施降低了PM2.5中的金属组分含量;奥运前与奥运期间PM2.5均可对A549细胞产生明显的毒性作用;奥运期间PM2.5具有更小的膜毒性,可能与金属组分的降低有关。
引用
收藏
页码:847 / 850
页数:4
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