蛋白质加合物作为分子生物标志物的分析研究

为了探索研究用人的静脉血中蛋白质 -环氧苯乙烯加合物作为人接触苯乙烯的分子生物标志物的可行性 ,用改进的 Ra-Ni方法分析测定蛋白质 -环氧苯乙烯加合物 .收集大白鼠鲜血与环氧苯乙烯体外反应的加合物样品 ,用定量苯乙烯 ,环氧苯乙烯染毒的大白鼠血样品和 2个现场接触苯乙烯的工人静脉血 (石棉厂 ,钢琴厂 )样品 ,测所有样品里的蛋白质加合物 .结果表明体外反应样品 ,所测的蛋白质 -环氧苯乙烯加合物与环氧苯乙烯剂量有较好的相关性 ;动物实验样品所测的蛋白质加合物分别与注射环氧苯乙烯 ,苯乙烯剂量呈较好的相关性 ;现场人群的样品 ,所测石棉厂的人群血中蛋白质加合物与接触苯乙烯剂量有一定的相关性 ,而钢琴厂的人群血样中所测的蛋白质加合物与接触苯乙烯剂量相关性不明显 .根据蛋白质 -环氧苯乙烯加合物与剂量的关系 ,初步确认用血红蛋白中的半胱氨酸 -环氧苯乙烯加合物作为人接触苯乙烯的分子标志物有可行性 .同时为用蛋白质 -环氧苯乙烯加合物作为人接触低浓度苯乙烯的分子生物标志物提供可靠的现场实验数据 .

Investigation of Protein Adducts as A Molecular Biomarker for Human Exposed to Pollutants

Hemoglobin styrene oxide adducts in blood was studied as a molecular biomarker of worker exposed to styrene.Determination of protein styrene oxide adducts in different biological samples with modified Ra Ni procedure was described in this paper.The following biological samples were investigated:flash rat blood reacted with styrene oxide in vitro;rat blood reacted with styrene or styrene oxide in vivo;vein blood from workers in two factories who exposed to styrene.The data showed that there was a good dose response relationship between reacting dose of styrene oxide or styrene and amount of protein styrene oxide adducts in both in vitro and in vivo experiments.For human samples,a dose response relationship between adducts and exposure was found in glass fiber factory,but none in piano manufacture plant.