Mouse lung-adapted mutation of E190G in hemagglutinin from H5N1 influenza virus contributes to attenuation in mice.
Identifieur interne : 000640 ( PubMed/Corpus ); précédent : 000639; suivant : 000641Mouse lung-adapted mutation of E190G in hemagglutinin from H5N1 influenza virus contributes to attenuation in mice.
Auteurs : Pengfei Han ; Yi Hu ; Wei Sun ; Sen Zhang ; Yuchang Li ; Xiaoyan Wu ; Yinhui Yang ; Qingyu Zhu ; Tao Jiang ; Jing Li ; Chengfeng QinSource :
- Journal of medical virology [ 1096-9071 ] ; 2015.
English descriptors
- KwdEn :
- Adaptation, Biological, Animals, Body Weight, Female, Hemagglutinin Glycoproteins, Influenza Virus (genetics), Influenza A Virus, H5N1 Subtype (genetics), Influenza A Virus, H5N1 Subtype (pathogenicity), Influenza A Virus, H5N1 Subtype (physiology), Lung (virology), Mice, Inbred BALB C, Mutation, Missense, Orthomyxoviridae Infections (pathology), Orthomyxoviridae Infections (virology), Survival Analysis, Viral Load, Viral Plaque Assay, Virulence, Virulence Factors (genetics), Virus Attachment, Virus Replication.
- MESH :
- chemical , genetics : Hemagglutinin Glycoproteins, Influenza Virus, Virulence Factors.
- genetics : Influenza A Virus, H5N1 Subtype.
- pathogenicity : Influenza A Virus, H5N1 Subtype.
- pathology : Orthomyxoviridae Infections.
- physiology : Influenza A Virus, H5N1 Subtype.
- virology : Lung, Orthomyxoviridae Infections.
- Adaptation, Biological, Animals, Body Weight, Female, Mice, Inbred BALB C, Mutation, Missense, Survival Analysis, Viral Load, Viral Plaque Assay, Virulence, Virus Attachment, Virus Replication.
Abstract
The highly pathogenic H5N1 avian influenza virus is one of the greatest influenza pandemic threats since 2003. The association of the receptor binding domain (RBD) with the virulence of influenza virus is rarely addressed, particularly of H5N1 influenza viruses. In this study, BALB/c mice were intranasally infected with A/Vietnam/1194/2004 (VN1194, H5N1). The mouse lung-adapted variants were isolated and the mutation of E190G (H3 numbering) in the RBD was recognized. The recombinant virus, rVN-E190G carrying E190G in hemagglutinin (HA) was designed and rescued using reverse genetics techniques. The receptor binding activity, growth curve and pathogenicity in mice of the rVN-E190G were investigated. Results demonstrated that rVN-E190G virus increased the binding avidity to α2,6 SA (sialic acid) and reduced the affinity to α2,3 SA, meanwhile weakened the viral replication in vitro. Moreover, the virulence assessment demonstrated that rVN-E190G was attenuated in mice. These results indicated that the mutation E190G in HA decreases H5N1 viral replication in vitro and significantly attenuates virulence in vivo. These findings identify one of the determinants in RBD which can be associated with H5N1 virulence in mice.
DOI: 10.1002/jmv.24257
PubMed: 26089289
Links to Exploration step
pubmed:26089289Le document en format XML
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<front><div type="abstract" xml:lang="en">The highly pathogenic H5N1 avian influenza virus is one of the greatest influenza pandemic threats since 2003. The association of the receptor binding domain (RBD) with the virulence of influenza virus is rarely addressed, particularly of H5N1 influenza viruses. In this study, BALB/c mice were intranasally infected with A/Vietnam/1194/2004 (VN1194, H5N1). The mouse lung-adapted variants were isolated and the mutation of E190G (H3 numbering) in the RBD was recognized. The recombinant virus, rVN-E190G carrying E190G in hemagglutinin (HA) was designed and rescued using reverse genetics techniques. The receptor binding activity, growth curve and pathogenicity in mice of the rVN-E190G were investigated. Results demonstrated that rVN-E190G virus increased the binding avidity to α2,6 SA (sialic acid) and reduced the affinity to α2,3 SA, meanwhile weakened the viral replication in vitro. Moreover, the virulence assessment demonstrated that rVN-E190G was attenuated in mice. These results indicated that the mutation E190G in HA decreases H5N1 viral replication in vitro and significantly attenuates virulence in vivo. These findings identify one of the determinants in RBD which can be associated with H5N1 virulence in mice.</div>
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