详细信息

重金属铬单克隆抗体特异性ELISA免疫检测方法的建立    

Development of specific ELISA for the detection of monoclonal antibody against heavy metal Cr

文献类型:期刊文献

中文题名:重金属铬单克隆抗体特异性ELISA免疫检测方法的建立

英文题名:Development of specific ELISA for the detection of monoclonal antibody against heavy metal Cr

作者:俞华齐[1];王娟[2];姜忍忍[2];姚刚[2];刘少伟[1]

机构:[1]华东理工大学生物工程学院国家重点实验室,上海200237;[2]中国科学院上海生命科学研究院营养科学研究所食品安全研究中心,上海200031

年份:2016

卷号:32

期号:2

起止页码:460

中文期刊名:江苏农业学报

外文期刊名:Jiangsu Journal of Agricultural Sciences

收录:CSTPCD;;北大核心:【北大核心2014】;CSCD:【CSCD_E2015_2016】;

基金:科技部"十二五"国家科技支撑计划项目(2011BAZ0319814;2012BAK01B00)

语种:中文

中文关键词:重金属Cr;纳米抗体;噬菌体展示;间接竞争性ELISA

外文关键词:heavy metal Cr; nanobody; phage display; indirect competitive ELISA;

摘要:为了利用抗体库筛选技术制备检测重金属铬的单克隆抗体,本研究利用螯合剂DTPA成功制备了重金属Cr的完全抗原,并利用制备的完全抗原结合噬菌体展示技术成功筛选到了特异性识别Cr?DTPA的噬菌体抗体Cr?DTPA?VHH 4?63。结果显示,获得的抗体亲和常数为1.279×109 L/mol,与载体蛋白BSA/OVA及无金属抗原DTPA?BSA/OVA均无交叉反应,与其他金属离子也没有交叉反应,特异性强。利用制备的Cr?DTPA噬菌体抗体初步建立了ELISA免疫检测法,其方法最低检测限达到1μg/L,水样加标回收试验平均回收率90%~114%,达到国家饮用水检测标准,可用于农业灌溉用水及生活饮用水中的重金属铬的检测。
A complete antigen Cr-DTPA for heavy metal Cr was prepared using chelator p-SCN?Bn-DTPA, and the phage antibody Cr-DTPA?VHH 4?63 specifically identifying Cr-DTPA was selected by phage display technique. The nano-body showed a strong specificity, with no cross reactions with carrier protein BSA/OVA, non-metallic antigen DTPA-BSA/OVA, and other metallic ions. The indirect competitive ELISA method developed based on the nanobody could detect as low as 1μg/L Cr in the water sample. The average recovery of Cr spiked in the water sample reached 90%-114%, meeting the national standard for drinking water detection. The method established in this study could be applied for heavy metal detec-tion in irrigation water and drinking water.

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