| Literature DB >> 21734052 |
Chris Ka Pun Mok1, Hui Ling Yen, May Yan Mei Yu, Kit Man Yuen, Sin Fun Sia, Michael Chi Wai Chan, Gang Qin, Wen Wei Tu, Joseph Sriyal Malik Peiris.
Abstract
We investigated the tropism, host responses, and virulence of two variants of A/Quail/Hong Kong/G1/1997 (H9N2) (H9N2/G1) with D253N and Q591K in the PB2 protein in primary human macrophages and bronchial epithelium in vitro and in mice in vivo. Virus with PB2 D253N and Q591K had greater polymerase activity in minireplicon assays, induced more tumor necrosis factor alpha (TNF-α) in human macrophages, replicated better in differentiated normal human bronchial epithelial (NHBE) cells, and was more pathogenic for mice. Taken together, our studies help define the viral genetic determinants that contribute to pathogenicity of H9N2 viruses.Entities:
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Year: 2011 PMID: 21734052 PMCID: PMC3165745 DOI: 10.1128/JVI.00702-11
Source DB: PubMed Journal: J Virol ISSN: 0022-538X Impact factor: 5.103