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- W2397294990 abstract "Objective To understand mutations of avian influenza virus (AIV) under the antibody selective pressures. Methods We continuously passed an H9N2-AIV strain LG1 in embryos with or without maternal antibody to LG1 in 6 separate serials. At the 10th, 20th, 30th, 40th and 50th passages in each serial, H9 hemagglutinatin gene (HA) sequences were determined and compared to the original LG1 strain. Results Only unstable random mutations happened in 29 sites with nonsynonymous vs synonymous (N/S) mutation ratio of 1.42 during 50 passages in 2 serials without maternal antibodies. However, multiple stable nonsynonymous mutations were detected gradually during 50 passages of 4 serials in embryos with maternal antibody to LG1 strain, and the NS/S ratio was as high as 3.46 among 45 mutated sites. Conclusion The results suggested that the antibody selective pressure influenced mutations of H9N2 AIV HA gene during the passages in embryos with maternal antibody. Embryos with maternal antibody to certain viruses could be used as experimental models to study the immune selective pressures on viral mutations." @default.
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- W2397294990 date "2009-07-01" @default.
- W2397294990 modified "2023-09-22" @default.
- W2397294990 title "Mutations of the hemagglutinin gene of H9N2 subtype avian influenza viruses under selective pressure of antibody" @default.
- W2397294990 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19873762" @default.
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