Differential replication of avian influenza H9N2 viruses in human alveolar epithelial A549 cells.

Abstract:

:Avian influenza virus H9N2 isolates cause a mild influenza-like illness in humans. However, the pathogenesis of the H9N2 subtypes in human remains to be investigated. Using a human alveolar epithelial cell line A549 as host, we found that A/Quail/Hong Kong/G1/97 (H9N2/G1), which shares 6 viral "internal genes" with the lethal A/Hong Kong/156/97 (H5N1/97) virus, replicates efficiently whereas other H9N2 viruses, A/Duck/Hong Kong/Y280/97 (H9N2/Y280) and A/Chicken/Hong Kong/G9/97 (H9N2/G9), replicate poorly. Interestingly, we found that there is a difference in the translation of viral protein but not in the infectivity or transcription of viral genes of these H9N2 viruses in the infected cells. This difference may possibly be explained by H9N2/G1 being more efficient on viral protein production in specific cell types. These findings suggest that the H9N2/G1 virus like its counterpart H5N1/97 may be better adapted to the human host and replicates efficiently in human alveolar epithelial cells.

journal_name

Virol J

journal_title

Virology journal

authors

Lee DC,Mok CK,Law AH,Peiris M,Lau AS

doi

10.1186/1743-422X-7-71

subject

Has Abstract

pub_date

2010-03-25 00:00:00

pages

71

issn

1743-422X

pii

1743-422X-7-71

journal_volume

7

pub_type

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