胃癌高发低发区化学元素相关性研究

Chemical trace elements in the hair of residents living in the high and low incidence areas of gastric cancers

目的通过检测胃癌高、低发区居民头发中的化学元素含量,探讨化学元素与胃癌的关系。方法随机抽取福建省胃癌高、低发区年龄在50-65岁范围的常住居民,其中高发区长乐市103人,低发区福安市102人,取后枕部头发2 g为检测样本,采用等离子体质谱法（ICP-MS）和原子荧光光谱法（AFS）测试,采用非参数秩和检验对数据进行分析。结果胃癌高发区健康居民头发中Co、Hg、Mn、Ni、Se、Sr、Cu、Zn、Sn 9种元素显著高于低发区（P〈0.05）;而As、Mo元素含量显著低于胃癌低发区（P〈0.05）;Ba、Cd、Cr、Pb、Fe在两地健康居民头发中含量差异无统计学意义。结论微量元素在高、低发区居民体内的负荷存在差异,体内As、Mo含量高可能对胃癌低发区居民起到保护作用。

Objective To explore the relationship between chemical trace elements and gastric cancers.Methods The hair was randomly collected from the residents living in the areas with high（103） and low（102） incidence rate of gastric cancers.The sample of 2g hair was analyzed for trace chemical elements by the assays of inductively coupled plasma mass spectroscopy（ICP-MS） and atomic fluorescence spectrometry（AFS）.Non-parameter rank sum tests were used for statistical analysis.Results The hair trace chemical contents of Co,Hg,Mn,Ni,Se,Sr,Cu,Zn and Sn were significantly higher in the residents of areas with high gastric cancer incidence than in the residents of areas with low gastric cancer incidence（P0.05）.The hair trace chemical contents of As and Mo were lower in the residents of areas with high gastric cancer incidence than in the residents of areas with low gastric cancer incidence（P0.05）.Conclusion The trace chemical contents of hair were different between the residents living in the areas with the high and low incidences of gastric cancers.It should be further investigated for the low hair trace contents of As and Mo in the residents of areas with low cancer incidence.