Sensitive and direct detection of receptor binding specificity of highly pathogenic avian influenza A virus in clinical samples.

Sensitive and direct detection of receptor binding specificity of highly pathogenic avian influenza A virus in clinical samples.
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DOI:
10.1371/journal.pone.0078125
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Suzuki T
Suzuki T
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Takahashi T;Kawakami T;Mizuno T;Minami A;Uchida Y;Saito T;Matsui S;Ogata M;Usui T;Sriwilaijaroen N;Hiramatsu H;Suzuki Y;Suzuki T

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Influenza A virus (IAV) recognizes two types of N-acetylneuraminic acid (Neu5Ac) by galactose (Gal) linkages, Neu5Acα2,3Gal and Neu5Acα2,6Gal. Avian IAV preferentially binds to Neu5Acα2,3Gal linkage, while human IAV preferentially binds to Neu5Acα2,6Gal linkage, as a virus receptor. Shift in receptor binding specificity of avian IAV from Neu5Acα2,3Gal linkage to Neu5Acα2,6Gal linkage is generally believed to be a critical factor for its transmission ability among humans. Surveillance of this shift of highly pathogenic H5N1 avian IAV (HPAI) is thought to be a very important for prediction and prevention of a catastrophic pandemic of HPAI among humans. In this study, we demonstrated that receptor binding specificity of IAV bound to sialo-glycoconjugates was sensitively detected by quantifying the HA gene with real-time reverse-transcription-PCR. The new assay enabled direct detection of receptor binding specificity of HPAIs in chicken clinical samples including trachea and cloaca swabs in only less than 4 h.
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