食品科学 ›› 2011, Vol. 32 ›› Issue (18): 221-224.doi: 10.7506/spkx1002-6630-201118048

• 分析检测 • 上一篇    下一篇

基于HRP标记抗体的黄曲霉毒素M1的直接竞争-ELISA快速检测方法

裴世春1,肖理文2   

  1. 1. 齐齐哈尔大学食品与生物工程学院
    2. 上海优你生物技术股份有限公司
  • 出版日期:2011-09-25 发布日期:2011-09-24
  • 基金资助:
    黑龙江省留学归国人员项目(Lc05c11)

Rapid Detection of Aflatoxin M1 by Anti-AFM1 mAb-HRP Based Dc-ELISA

PEI Shi-chun1,XIAO Li-wen2   

  1. (1. College of Food and Biological Engineering, Qiqihar University, Qiqihar 161006, China; 2. Shanghai Uni Biotech Co. Ltd., Shanghai 201616, China)
  • Online:2011-09-25 Published:2011-09-24

摘要: 为构建快速检测乳制品中黄曲霉毒素M1(AFM1)的直接竞争-酶联免疫吸附(dc-ELISA)体系,将辣根过氧化物酶(HRP)与高纯度抗AFM1单克隆抗体进行偶联后对其与AFM1竞争性反应条件进行优化,并利用AFM1污染标准物质ERMI-BD282(0)、ERMI-BD 283(0.11μg/kg)、ERMI-BD 284(0.44μg/kg)等对检测体系的灵敏度和精确性进行验证。结果当AFM1-BSA包被质量浓度0.25μg/L、抗AFM1 mAb-HRP稀释2000倍时dc-ELISA检测AFM1的IC50为0.75μg/L,检测范围为0.015~4.05μg/L,添加AFM1至0.45μg/L的鲜奶样品中检测回收率平均为80%,dc-ELISA可满足鲜乳中AFM1国家残留限量标准0.5μg/kg的检测要求。该体系可应用于鲜奶制品中AFM1大于0.5μg/kg污染样品的快速初筛。

关键词: 直接竞争-酶联免疫法(dc-ELISA), 黄曲霉毒素M1(AFM1), 乳品, 检测

Abstract: A rapid and sensitive direct competitive enzyme-linked immunosorbent assay (ELISA) using anti-AFM1 mAb with horseradish peroxidase (HRP) to measure aflatoxin M1 (AFM1) in milk was described. Using AFM1 contaminated milk ERMI-BD282 (zero), ERMI-BD 283 (0.11 μg/kg) and ERMI-BD 284 (0.44μg/kg), the sensitivity and accuracy of the developed assay was validated. The optimized assay conditions regarding sensitivity and stability were found to be: coating AFM1-BSA antigen concentration 0.25 μg/kg and dilution factor of anti-AFM1 mAb-HRP conjugate 2000. Assays of ERMI-BD282 samples spiked with AFM1 at the level of 0.45 μg/L revealed an average recovery of around 80%. The developed method showed an IC50 of 0.75μg/L and a linear range of 0.015-4.05 μg/L. This assay may be used in rapid screening of contaminated milk at AFM1 >0.5μg/L.

Key words: direct competitive enzyme-linked immunosorbent assay (dc-ELISA), aflatoxin M1 (AFM1), milk, detection

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