The arsenic contamination accident in Yangzonghai Lake,Yunnan has been of wide concern.In order to investigate the arsenic distribution and concentration trends after the accident,samples including lake water,sediment...The arsenic contamination accident in Yangzonghai Lake,Yunnan has been of wide concern.In order to investigate the arsenic distribution and concentration trends after the accident,samples including lake water,sediments,soil,aquatic organisms and crops were collected in November 2008,as well as in February,May and September 2009.The average arsenic concentrations (arithmetic average) in lake water in the four sampling events were 176.9,147.3,159.3,and 161.1 μg/L,while those in the sediments were 32.87,62.41,62.99,and 46.96 μg/g,respectively.The highest content of total arsenic in soil in the vicinity of Yangzonghai was 23.33 μg/g,which was below the limits of the relevant national standard.The total arsenic levels in most aquatic plants were in the range of 100-200 μg/g,with Vallisneria natans (Lour.) Hara having the highest concentration of ～300 μg/g.The arsenic levels of fish and shrimps were in the range of 1.52-11.4 μg/g (dry weight).展开更多
目的:探讨环境低砷暴露地区2型糖尿病人群尿砷浓度与外周血单个核细胞(PBMC)相对端粒长度的关系。方法:选取华南某地574名2型糖尿病患者作为研究对象,进行基本情况调查与生化指标检测,利用电感耦合等离子质谱仪(ICP-MS)检测尿砷浓度,实...目的:探讨环境低砷暴露地区2型糖尿病人群尿砷浓度与外周血单个核细胞(PBMC)相对端粒长度的关系。方法:选取华南某地574名2型糖尿病患者作为研究对象,进行基本情况调查与生化指标检测,利用电感耦合等离子质谱仪(ICP-MS)检测尿砷浓度,实时荧光定量PCR法(qPCR)检测PBMC相对端粒长度。根据尿砷浓度将研究对象分为3组,比较各组间生化指标与PBMC相对端粒长度的差异;采用单因素与多因素有序Logistic回归分析研究2型糖尿病人群PBMC相对端粒长度的影响因素;采用SPSS Process 2.0分析糖化血红蛋白在尿砷与相对端粒长度之间的中介效应。结果:2型糖尿病患者尿砷中位数为29.80μg/L,四分位数间距为39.81μg/L。PBMC相对端粒长度为0.82±0.60,低砷组、中砷组与高砷组PBMC相对端粒长度分别为1.04±0.92,0.77±0.29与0.63±0.28,差异具有统计学意义(P<0.05)。多因素有序Logistic回归分析发现,尿砷是影响相对端粒长度的危险因素;中砷组与低砷组相比,OR(95%CI)为2.149(1.451,3.182);高砷组与低砷组相比,OR(95%CI)为4.077(2.687,6.185),差异均具有统计学意义(P<0.01)。中介效应分析结果显示,尿砷对相对端粒长度的直接效应值为-0.287(-0.369,-0.204),糖化血红蛋白是尿砷与相对端粒长度之间的一个中介变量,中介效应值为-0.072(-0.106,-0.045),中介比例为19.99%。结论:环境低砷暴露条件下,尿砷是影响2型糖尿病患者PBMC相对端粒长度的危险因素,尿砷浓度越高,相对端粒长度越短。2型糖尿病患者PBMC相对端粒长度可能是砷暴露的潜在生物标志。展开更多
基金supported by the National Basic Research Program of China (2009CB421605)the National Natural Science Foundation of China (20677069)Key Project in Foreign Cooperation of Chinese Academy of Sciences (GJHZ 0907)
文摘The arsenic contamination accident in Yangzonghai Lake,Yunnan has been of wide concern.In order to investigate the arsenic distribution and concentration trends after the accident,samples including lake water,sediments,soil,aquatic organisms and crops were collected in November 2008,as well as in February,May and September 2009.The average arsenic concentrations (arithmetic average) in lake water in the four sampling events were 176.9,147.3,159.3,and 161.1 μg/L,while those in the sediments were 32.87,62.41,62.99,and 46.96 μg/g,respectively.The highest content of total arsenic in soil in the vicinity of Yangzonghai was 23.33 μg/g,which was below the limits of the relevant national standard.The total arsenic levels in most aquatic plants were in the range of 100-200 μg/g,with Vallisneria natans (Lour.) Hara having the highest concentration of ～300 μg/g.The arsenic levels of fish and shrimps were in the range of 1.52-11.4 μg/g (dry weight).
文摘目的:探讨环境低砷暴露地区2型糖尿病人群尿砷浓度与外周血单个核细胞(PBMC)相对端粒长度的关系。方法:选取华南某地574名2型糖尿病患者作为研究对象,进行基本情况调查与生化指标检测,利用电感耦合等离子质谱仪(ICP-MS)检测尿砷浓度,实时荧光定量PCR法(qPCR)检测PBMC相对端粒长度。根据尿砷浓度将研究对象分为3组,比较各组间生化指标与PBMC相对端粒长度的差异;采用单因素与多因素有序Logistic回归分析研究2型糖尿病人群PBMC相对端粒长度的影响因素;采用SPSS Process 2.0分析糖化血红蛋白在尿砷与相对端粒长度之间的中介效应。结果:2型糖尿病患者尿砷中位数为29.80μg/L,四分位数间距为39.81μg/L。PBMC相对端粒长度为0.82±0.60,低砷组、中砷组与高砷组PBMC相对端粒长度分别为1.04±0.92,0.77±0.29与0.63±0.28,差异具有统计学意义(P<0.05)。多因素有序Logistic回归分析发现,尿砷是影响相对端粒长度的危险因素;中砷组与低砷组相比,OR(95%CI)为2.149(1.451,3.182);高砷组与低砷组相比,OR(95%CI)为4.077(2.687,6.185),差异均具有统计学意义(P<0.01)。中介效应分析结果显示,尿砷对相对端粒长度的直接效应值为-0.287(-0.369,-0.204),糖化血红蛋白是尿砷与相对端粒长度之间的一个中介变量,中介效应值为-0.072(-0.106,-0.045),中介比例为19.99%。结论:环境低砷暴露条件下,尿砷是影响2型糖尿病患者PBMC相对端粒长度的危险因素,尿砷浓度越高,相对端粒长度越短。2型糖尿病患者PBMC相对端粒长度可能是砷暴露的潜在生物标志。
基金National Natural Science Foundation of China(21177163)111 Project B08044+6 种基金First-class University First-class Academic Program of Minzu University of China(YLDX01013)Special Guidance Fund of Building World First-class Universities(Disciplines)and Characteristic Development(2016)Coordinate Development of First-class and First-class University Discipline Construction Funds(10301-0150200604)The Academic Team Construction Project of Minzu University of China(2015MDTD25C&13C)Student Innovation Project of Minzu University of China(URTP2015110060)First-class Universities and First-class Discipline Construction Transitional Funds Under Special Funding(2016,Master)Collaborative Innovation Center for Ethnic Minority Development,Minzu University of China
