Development and preliminary application of an indirect ELISA for detecting antibodies against Avian Influenza Virus

被引:1
|
作者
Wang, G. [1 ]
Ding, J. [1 ]
Hu, S. [1 ]
Yang, X. [1 ]
机构
[1] Hunan Agr Univ, Fac Vet, Changsha, Hunan, Peoples R China
关键词
Avian influenza virus; Enzyme-linked immunosorbent assay; Matrix; 1; protein; H5N1; HEMAGGLUTININ; DIAGNOSIS;
D O I
10.1016/j.rvsc.2011.12.010
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Fragment of 759 bp DNA spanning the Matrix 1 (M1) gene of Avian Influenza Virus (AIV) was inserted into an expression vector pET28c to construct a recombinant plasmid pET28c-M1. The pET28c-M1 plasmid was transformed into the Escherichia coli BL21 (DE3) competent cell to produce a recombinant strain E. coli 21 (DE3). After being induced by Isopropyl-b-D-galactopyranoside (IPTG), E. coli 21 (DE3) expressed a 28-kDa fusion protein at a high level. This protein can bind anti-AIV (H5N1) positive serum by Western-blot analysis. After being denatured, renatured, and purified by Ni2+-column, the fusion protein was used as an antigen to develop Matrix 1 Enzyme-Linked lmmunosorbent Assay (M1-ELISA) for detecting antibodies against AIV from chicken serum. We found that this indirect M1-ELISA was sensitive for differentiating antisera against AIV and antisera against other six kinds of avian viruses apart from AIV and this method is more sensitive than Hemagglutination Inhibition (HI) test. When compared with HI test and ELISA (IDEXX) in evaluating 581 serum samples from field vaccinated chickens, this assay showed 93.3% agreement ratio with the HI test, as well as 96.0% agreement ratio with ELISA (IDEXX). In a preliminary application, the assay successfully detected 19 AIVs from 51 nonvaccinated chicken lungs. It concludes that an indirect ELISA was successfully developed for detecting AIV. The assay is specific and sensitive. The application will greatly contribute to the long-term prevention and control of avian influenza in China. (c) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:710 / 715
页数:6
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