教師資料查詢 | 類別: 期刊論文 | 教師: 張玉坤 Yue-cune Chang (瀏覽個人網頁)

標題:Exposure to fine particulate matter causes oxidative and methylated DNA damage in young adults: A longitudinal study
學年105
學期2
出版(發表)日期2017/04/23
作品名稱Exposure to fine particulate matter causes oxidative and methylated DNA damage in young adults: A longitudinal study
作品名稱(其他語言)
著者Ching-Huang Lai , Han-Bin Huang, Yue-Cune Chang, Ting-Yao Su, Chin-Sheng Tang, Trong-Neng Wu, Saou-Hsing Liou
單位
出版者
著錄名稱、卷期、頁數Science of the Total Environment 598, p.289–296
摘要An increased understanding is needed of the physiological effects and plausible biological mechanisms that link PM2.5 (particulate matter with an aerodynamic diameter below 2.5 μm) exposure to mortality and morbidities such as atherosclerosis and respiratory disease. PM2.5 causes carcinogenic health effects. Biomonitoring in humans has suggested that 8-oxo-7, 8-dihydro-2-deoxyguanosine (8-oxodG) and N7-methylguanine (N7-MeG) are correlated with oxidative and methylated DNA damage. Thus, it is meaningful to explore the mechanisms of mutagenesis and carcinogenesis associated with oxidative and methylated DNA damage by simultaneously measuring these two markers. We recruited 72 participants from 2 areas (residential and commercial as well as residential and industrial) in the greater Taipei metropolitan area at baseline. Personal samplers were used to collect 24-hour PM2.5-integrated samples. All participants completed an interview, and blood and urine samples were collected the next morning. All collection procedures were repeated twice after a two-month follow-up period. Urinary 8-oxodG and N7-MeG were assayed as biomarkers of oxidative and methylated DNA damage, respectively. Plasma superoxide dismutase (SOD) and glutathione peroxidase-1 (GPX-1) were measured as biomarkers of antioxidants. Urinary 1-hydroxypyrene (1-OHP) was used as a biomarker of exposure to polycyclic aromatic hydrocarbons (PAHs).
The mean PM2.5 level was 37.3 μg/m3 at baseline. PM2.5 concentrations were higher during winter than during spring and summer. After adjusting for confounds through a generalized estimating equation (GEE) analysis, N7-MeG was significantly increased by 8.1% (β = 0.034, 95% CIs = 0.001–0.068) per 10 μg/m3 increment in PM2.5. 8-oxodG levels were positively correlated with N7-MeG according to both cross-sectional and longitudinal analyses, and 1-OHP was significantly associated with increasing 8-oxodG and N7-MeG concentrations.
Exposure to PM2.5 increases methylated DNA damage. The mean level of urinary N7-MeG was 1000-fold higher than that of 8-oxodG.
關鍵字Fine particulate matter; PM2.5; 1-Hydroxypyrene; N7-methylguanine (N7-MeG); 8-Oxo-7,8-dihydro-2-deoxyguanosine (8-oxodG); Longitudinal study
語言英文
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別荷蘭
公開徵稿
出版型式,電子版,紙本
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