A novel nanobody and mimotope based immunoassay for rapid analysis of aflatoxin B1.

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ID: 59971
2019
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Abstract
Mimotopes could replace mycotoxins and their conjugates to develop immunoassay methods. The mimotopes obtained by phage display technology were mainly using monoclonal antibodies or polyclonal antibodies as targets. However, the mimotope of recombinant antibody has not been selected and applied to immunoassay for mycotoxin. The purpose of this study was to prove that an immunoassay for mycotoxin could be developed based on both recombinant antibody and its mimotope. Using aflatoxin B1 (AFB) as a model system, mimotopes of an aflatoxin nanobody Nb28 were screened by phage display. A rapid magnetic beads-based directed competitive ELISA (MB-dcELISA) was developed utilizing Nb28 and its mimotope ME17. The 50% inhibitory concentration and the detection limit of the MB-dcELISA were 0.75 and 0.13 ng/mL, respectively, with a linear range of 0.24-2.21 ng/mL. Further validation study indicated good recovery (84.2-116.2%) with low coefficient of variable (2.2%-15.9%) in spiked corn, rice, peanut, feedstuff, corn germ oil and peanut oil samples. The developed immunoassay based on nanobody and mimotope provides a new strategy for the monitoring of AFB and other toxic small molecular weight compounds.
Reference Key
zhao2019atalanta Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhao, Fengchun;Tian, Yuan;Shen, Qiang;Liu, Ruxia;Shi, Ruirui;Wang, Huimin;Yang, Zhengyou;
Journal Talanta
Year 2019
DOI
S0039-9140(18)31165-2
URL
Keywords
aflatoxin mimotope magnetic beads-based elisa nanobody phage-display

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