Immunochromatographic assay of T-2 toxin using labeled anti-species antibodies

被引:0
|
作者
A. E. Urusov
A. V. Petrakova
A. V. Bartosh
M. K. Gubaydullina
A. V. Zherdev
B. B. Dzantiev
机构
[1] Research Center of Biotechnology of the Russian Academy of Sciences,A.N. Bach Institute of Biochemistry
来源
Applied Biochemistry and Microbiology | 2017年 / 53卷
关键词
immunochromatographic assay; test strips; sensitivity enhancement; gold nanoparticles; T-2 toxin;
D O I
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中图分类号
学科分类号
摘要
A new scheme of immunochromatographic assay was developed for the highly sensitive detection of low-molecular-weight analytes. This scheme includes the following two steps: the formation of complexes of free specific antibodies with an antigen and their detection by anti-species antibodies conjugated to gold nanoparticles as the label. This scheme was tested with mycotoxin T-2 toxin in maize extracts. The use of specific antibodies and a label as two individual components made it possible to independently vary their concentrations with a simultaneous decrease in the detection limit and an increase in the color intensity. The assay did not require additional reagents and manipulations. The instrumental and visual detection limits of the designed test system were 0.1 and 5.0 ng/mL, respectively (2 and 90 ng per gram of analytes), which are two orders of magnitude lower compared to conventional immunochromatography using the same reagents.
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页码:594 / 599
页数:5
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