Publication: A simple screening assay for receptor switching of avian influenza viruses
2
Issued Date
2008-06-01
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ISSN
13866532
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2-s2.0-44149111322
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Clinical Virology. Vol.42, No.2 (2008), 186-189
Suggested Citation
Ornpreya Suptawiwat, Alita Kongchanagul, Wisoot Chan-It, Arunee Thitithanyanont, Witawat Wiriyarat, Krisada Chaichuen, Taweesak Songserm, Yasuo Suzuki, Pilaipan Puthavathana, Prasert Auewarakul A simple screening assay for receptor switching of avian influenza viruses. Journal of Clinical Virology. Vol.42, No.2 (2008), 186-189. doi:10.1016/j.jcv.2008.01.014 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/19327
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Title
A simple screening assay for receptor switching of avian influenza viruses
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Abstract
Background: Adaptation of the receptor-binding preference from α2,3- to α2,6-linked sialic acid is an essential step for an avian influenza virus to transmit efficiently in human population and become a pandemic virus. The currently available assays for receptor-binding preference are complex and not widely available. Objectives: A simple high-throughput screening assay will facilitate early detection of a potential pandemic virus, which is crucial for the prevention and control of the possible pandemic. We wanted to develop a simple assay to differentiate influenza viruses with α2,3- or α2,6-linked receptor-binding preference. Study design: The assay employs a specific sialidase (from Salmonella thyphimurium) that can eliminate α2,3-linked sialic acid from red blood cells. A reduction of hemagglutination titer indicates α2,3-linked receptor preference in this assay. Results: Using a panel of H5N1 avian influenza isolates and H1/H3 human influenza isolates, as well as mutated H5 reverse genetics virus, the assay could accurately differentiate the viruses according to their receptor-binding preference. Furthermore, the assay was sufficiently sensitive to detect a minor variant with α2,6-linkage-specificity in a background of α2,3-linkage-specific virus. Conclusions: We have developed a simple screening assay capable of detecting avian influenza viruses that have switched their receptor-binding preference. © 2008 Elsevier B.V. All rights reserved.