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KMID : 0545120140240050704
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Journal of Microbiology and Biotechnology
2014 Volume.24 No. 5 p.704 ~ p.713
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Novel Phage Display-Derived H5N1-Specific scFvs with Potential Use in Rapid Avian Flu Diagnosis
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Jie Wu
Xian-Qiao Zeng
Hong-Bin Zhang
Han-Zhong Ni
Lei Pei
Li-Rong Zou
Li-Jun Liang
Xin Zhang
Jin-Yan Lin
Chang-Wen Ke
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Abstract
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The highly pathogenic avian influenza A (HPAI) viruses of the H5N1 subtype infect poultry and have also been spreading to humans. Although new antiviral drugs and vaccinations can be effective, rapid detection would be more efficient to control the outbreak of infections. In this study, a phage-display library was applied to select antibody fragments for HPAI strain A/Hubei/1/2010. As a result, three clones were selected and sequenced. A hemagglutinin inhibition assay of the three scFvs revealed that none exhibited hemagglutination inhibition activity towards the H5N1 virus, yet they showed a higher binding affinity for several HPAI H5N1 strains compared with other influenza viruses. An ELISA confirmed that the HA protein was the target of the scFvs, and the results of a protein structure simulation showed that all the selected scFvs bound to the HA2 subunit of the HA protein. In conclusion, the three selected scFVs could be useful for developing a specific detection tool for the surveillance of HPAI epidemic strains.
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KEYWORD
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H5N1 virus, antibody, phage library, diagnosis
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