| 2 | 城市大气可吸入颗粒物对质粒DNA的氧化性损伤显示文摘使用质粒DNA评价法(Plasmid DNA assay)研究了在北京市市区、郊区卫星城市南口镇和清洁对照点十三陵水库地区采集的PM10和PM2.5样品及部分源颗粒物的生物活性.结果表明,沙尘暴期间采集的颗粒物对DNA的生物活性小于非沙尘暴期间采集的样品.不同时间和地点采集的大气颗粒物样品对质粒DNA的损伤差别很大,它们的TM50(造成50%的DNA损伤所需的剂量)相差可高达一个数量级,其原因,可能是北京市大气颗粒物中矿物质量百分比的变化引起了生物活性较强的细颗粒物相对含量的改变.同PM10相比,大部分PM2.5样品的生物活性相对较大.最后,对比水溶和总体颗粒物质粒DNA评价的结果得出,大气颗粒物中的水溶组分是其生物活性的主要来源. | 时宗波 邵龙义 T.P.Jones A.G.Whittaker R.J.Richards 张鹏飞 | 2004 | 科学通报2004，49，7： | 39 |
| 3 | 室内PM_(10)对DNA氧化性损伤及其与微量元素组成关系显示文摘使用质粒DNA评价法(plasmid DNA assay)和电感偶合等离子体质谱(ICP-MS)研究了北 京市室内外PM10(可吸入颗粒物)的生物活性及与微量元素的关系.选择了4组样品分别代表吸烟 室内(1),非吸烟室内(2)和相应室外(1)进行质粒DNA评价研究.结果表明,室内PM10对超螺旋 DNA的氧化性损伤高于室外;吸烟室内PM10的TD50(引起50%DNA损伤所需的颗粒物剂量)低 达100 μg·mL-1,对DNA氧化性损伤最大,说明吸烟室内PM10的生物活性最大.结合微量元素 分析发现,吸烟室内PM10的水溶性Zn与TD50负相关性较其他元素强,说明水溶性Zn可能对 DNA的氧化性损伤起重要作用.Fe元素虽然被认为是最具生物活性的元素之一,但是在所分析样 品中Fe元素多是以不可溶状态存在,因此对DNA损伤较弱. | 邵龙义 赵厚银 T.P.Jones 吕森林 L.Merolla | 2005 | 自然科学进展2005，15，4： | 9 |
| 4 | Oxidative stress on plasmid DNA induced by inhalable particles in the urban atmosphere显示文摘Plasmid DNA assay is a newly-developed in vitro method to investigate bioreactivity of particles. In this paper, this method was used to study the bioreactivity of PM10 (particulate matter with aerodynamic diameter of less than 10 mm) and PM2.5 (particulate matter with aerodynamic diameter of less than 2.5 mm). Samples and dust storm particles were collected in 2001 in an urban area, a satellite city and a clean air area in Beijing. A big difference was found for oxidative DNA stress induced by different particulate matter (PM) samples, with the TM50 (particle mass causing 50% damage to DNA) values varying by a factor over 10. This was closely dependent on the sizes of particles as well as the variation in relative proportion of mineral matter. PM2.5 samples generally impose larger oxidative stress on plasmid DNA than PM10 samples. Airborne particles collected during dust storm episodes, usually with a higher proportion of mineral matter, have a much lower oxidative capacity than those collected during non-dust storm episodes. PM samples and their water-soluble fractions usually have similar bioreactivities, demonstrating that oxidative capacity of Beijing airborne particles is mainly sourced from their water-soluble fractions. | SHIZongbo SHAOLongyi T.P.Jones A.G.Whittaker R.J.Richards ZHANGPengfei | 2004 | Chinese Science Bulletin2004，49，7： | 4 |
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