Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Expression data of lungs from chickens infected with different H5N1 Avian Influenza Viruses [24 hours post infection]

ABSTRACT: Recently, a novel protein in the influenza virus segment 3 has been identified, namely PA-X. This small protein has been reported to play a role in modulating host response of the 1918 H1N1 pandemic virus-infected mice. However, poteinal role of this protein in the pathogenicity and regulating host response of the highly pathogenic H5N1 virus in a chicken animal model is completely unknown. We used microarray analysis to evaluate the global transcriptional response in the lungs of the chickens infected with the parental strain (CK10) and PA-X deficiency mutant strain (CK-PAX3). Chickens were inoculated with CK10 or CK-PAX3 or mock-infected. At 24 hours post infection, lungs were isolated from three chickens per group for RNA extraction and hybridization on Affymetrix microarrays. Samples were named as follows: CK10 (CK10-1,CK10-2,CK10-3), CK-PAX3 (CK-PAX3-1,CK-PAX3-2, CK-PAX3-3), Control (C-1, C-2, C-3).

ORGANISM(S): Gallus gallus

SUBMITTER: Jiao Hu

PROVIDER: E-GEOD-53931 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

PA-X decreases the pathogenicity of highly pathogenic H5N1 influenza A virus in avian species by inhibiting virus replication and host response.

Hu Jiao J Mo Yiqun Y Wang Xiaoquan X Gu Min M Hu Zenglei Z Zhong Lei L Wu Qiwen Q Hao Xiaoli X Hu Shunlin S Liu Wenbo W Liu Huimou H Liu Xiaowen X Liu Xiufan X

Journal of virology 20150128 8

<h4>Unlabelled</h4>PA-X is a newly discovered protein that decreases the virulence of the 1918 H1N1 virus in a mouse model. However, the role of PA-X in the pathogenesis of highly pathogenic avian influenza viruses (HPAIV) of the H5N1 subtype in avian species is totally unknown. By generating two PA-X-deficient viruses and evaluating their virulence in different animal models, we show here that PA-X diminishes the virulence of the HPAIV H5N1 strain A/Chicken/Jiangsu/k0402/2010 (CK10) in mice, ch ...[more]

PMID: 25631083

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Project description:Highly pathogenic avian influenza virus (HPAIV) is a permanent threat due to its capacity to cross species barriers and generate severe infections and high mortality in humans. Recent findings have highlighted the potential role of PB1-F2, a small accessory influenza protein, in the pathogenesis process mediated by HPAIV in mammals. In this study, using a recombinant H5N1 HPAIV (wt) and its PB1-F2-deleted mutant (M-NM-^TF2), we studied the effects of PB1-F2 in a chicken model. Unexpectedly, when using low inoculation dose we observed that the wt-infected chickens had a higher survival rate than the M-NM-^TF2-infected chickens, a feature that contrasts with what is usually observed in mammals. High inoculation dose had similar mortality rate for both viruses, and comparison of the bio-distribution of the two viruses indicated that the expression of PB1-F2 allows a better spreading of the virus within chicken embryos. Transcriptomic profiles of lungs and blood cells were characterized at two days post-infection in chickens inoculated with the wild type (wt) or the M-NM-^TF2 mutant viruses. In lungs, the expression of PB1-F2 during the infection induced pathways related to calcium signaling and repressed a large panel of immunological functions. In blood cells, PB1-F2 was associated to a gene signature specific for mitochondrial dysfunction and down-modulated leucocytes activation. Finally we compared the effect of PB1-F2 in lungs of chickens and mice. We identified that gene signature associated to tissue damages is a PB1-F2 feature shared by the two species; by contrast, the early inhibition of immune response mediated by PB1-F2 observed in chickens is not seen in mice. In summary, our data suggest that PB1-F2 expression deeply affect the immune host response in chickens in a way that may attenuate pathogenicity, a feature differing from what was previously observed in mammal species. Three-condition experiment, virus-infected (wt or M-NM-^TF2) vs. Mock-infected chickens. Biological replicates: 2x5 control replicates, 5 wt replicates, 5 M-NM-^TF2 replicates.

Dataset Information

Expression data of lungs from chickens infected with different H5N1 Avian Influenza Viruses [24 hours post infection]

Publications

PA-X decreases the pathogenicity of highly pathogenic H5N1 influenza A virus in avian species by inhibiting virus replication and host response.

Similar Datasets

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