数字农科院2.0

Early evaluation of aflatoxin occurrence risk using an ultra-sensitive immunoassay for pre-aflatoxin protein biomarker detection

文献类型： 外文期刊

作者： Fu J.;Gu M.;Tang X.;Zhang Q.;Li P.

作者机构：

关键词： Aflatoxin;Early evaluation;Food safety;Monoclonal antibody;Rolling circle amplification immunoassay

期刊名称： Food Control

ISSN： 0956-7135

年卷期： 2024 年 160 卷

页码：

收录情况： SCIE（2024版）

摘要： The pre-aflatoxin protein biomarker PAB-01 is a key target for early predicting of aflatoxin occurrence risk. Improving its detection sensitivity is significant for the early evaluation of potential risks. In this study, we obtained the monoclonal antibody 6A6 against PAB-01 through hybridoma technology. A sandwich ELISA was developed using pairwise combinations of PAB-01 nanobody, monoclonal antibody, and polyclonal antibody. It was found that the nanobody as the capture antibody and monoclonal antibody as the detection antibody exhibited the highest sensitivity, with a detection limit of 0.92 ng/mL. Based on this, a rolling circle amplification-based immunoassay (RCA-EIA) was established, with a linear range of 0.056–41.152 ng/mL and a detection limit of 0.033 ng/mL. Recovery rates in spiked peanut and corn samples ranged from 94.49% to 127.50%. This method successfully identified the presence of the PAB-01 protein in maize samples 10 days prior to the aflatoxin production. Based on PAB-01 concentration classifications, the maize samples were categorized into different risk levels. This development is significant for early warning and risk stratification management of aflatoxin occurrence, providing a highly effective tool in ensuring food safety. © 2024

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