摘要
目的探讨铬酸盐生产场所铬、铁联合暴露对工人外周血红细胞代谢的影响及其可能机制。方法2008年12月于济南某化工厂选择115名铬酸盐生产工人作为暴露组,选取远离工厂某小区的60名健康居民作为对照组。通过空气滤膜采样,调查各工段铬、铁的环境浓度。采集研究对象的外周血,进行全血铬、铁、铜含量(以下简称血铬、血铁、血铜)、血清中叶酸、维生素B12含量和平均红细胞血红蛋白含量(MCH)、平均红细胞体积(MCV)检测及相关性分析。结果铬酸盐生产场所各工段空气铬浓度中位数(四分位数间距)为9.0(10.5)ug/m3,空气铁浓度中位数(四分位数间距)为11.2(10.1)ug/m3,均高于对照组所在的居民小区[分别为0.1(0.1)、7.2(2.5)ug/m3](P值均〈0.01);暴露组血铬含量中位数(四分位数间距)为15.5(14.1)ug/L,血铁含量为(895.1±90.2)mg/L,与对照组[分别为3.6(2.0)ug/L、(563.7±49.3)mg/L]相比,差异有统计学意义(P值均〈0.01);暴露组血清叶酸、维生素B12血铜含量分别为(6.9±2.5)、(396.4±177.0)、(777.6±103.5)ug/L,均低于对照组[分别为(5580±330.8)、(8.1±3.8)、(812.1±94.6)ug/L](P值均〈0.05)。血铬含量与血清叶酸、维生素B12含量相关(r值分别为-0.319和-0.293,P值均〈0.01),血铁含最与血铜含量相关(r=-0.247,P〈0.01),血清维生素B12含量、血铜含量均与MCH、MCV相关(r值分别为-0.223、-0.242、-0.261、-0.292,P值均〈0.01)。结论铬酸盐生产各工段存在铬、铁的联合暴露,铬可能通过影响叶酸和维生素B12代谢、铁可能通过影响铜代谢,对机体红细胞代谢产生抑制作用。
Objective To investigate the effect of combined occupational exposure of chromiun and iron on erythrocyte metabolism, and the possible mechanism. Methods A total of 115 chromate production workers were selected in a chemical factory of Jinan as exposure group, Dec. 2008, and 60 healthy residents from a community which was far away from the factory were enrolled as control group. Environmental concentrations of chromium and iron were collected by filter membrane sampling and determined. The peripheral blood of subjects were collected for determination of chromium, iron, copper in whole blood and folate, vitamin BI2 in serum, mean corpuscular hemoglobin (MCH) and mean corpuscular volume (MCV) and correlation analysis was conducted. Results The median (quartile interval ) concentration of airchromium and air-iron in workplace were 9. 0 ( 10. 5 ) significantly higher than that of the control (0. 1 (0. 1 ) and 11.2 ( 10. 1 ) ug/m3 , respectively, which were and 7. 2(2. 5) ug/m3) (all P values 〈0. 01 ). Bloodchromium and blood-iron of the exposed group were 15.5( 14. 1) ug/L and (895.1 ±90.2) mg/L, which were significantly higher them the counterpart of the control(3.6(2. 0) ug/L, (563.7 ±49. 3) mg/L) ( all P values 〈0. 01 ). Serum folate ( (6. 9 ±2.5) ug/L), serum vitamin B12 ( (396. 4 ± 177. 0) ug/L) and hlood copper( (777.6 ± 103.5 ) ug/L) of the exposed group were all significantly lower comparing to the contro gropu ((558.0 ±330.8), (8.1±3.8),(812.1 ±94.6) ug/L) (all P values 〈0.05).The relationships betwecn blood chromium and serum folate, serum vitamin B12 were statistical significant (r =-0. 319 and -0. 293, P〈 0.01 ). Both serum vitamin B12 and blood copper correlated with mean corpuscular hemoglobin(MCH) and mean corpuscular volume (MCV) ( r = - 0. 223, - 0. 242, - 0. 261,-0. 292, all P values 〈 0.01 ). Conclusion Combined chromium and iron exposure existed in the wor
出处
《中华预防医学杂志》
CAS
CSCD
北大核心
2012年第4期355-358,共4页
Chinese Journal of Preventive Medicine
基金
基金项目:国家自然科学基金(81072281)
卫生部公益项目(200902006)
关键词
铬酸盐类
铬
铁
红细胞
Chromates
Chromium
Iron
Erythrocytes