In Vivo Characterization of Avian Influenza A (H5N1) and (H7N9) Viruses Isolated from Canadian Travelers

被引:9
作者
Lu, Yao [1 ,2 ]
Landreth, Shelby [1 ,3 ]
Gaba, Amit [1 ]
Hlasny, Magda [1 ]
Liu, Guanqun [1 ,3 ]
Huang, Yanyun [4 ]
Zhou, Yan [1 ,2 ,3 ]
机构
[1] Univ Saskatchewan, Vaccine & Infect Dis Org, Int Vaccine Ctr VIDO InterVac, Saskatoon, SK S7N 5E3, Canada
[2] Univ Saskatchewan, Dept Vet Microbiol, Western Coll Vet Med, Saskatoon, SK S7N 5B4, Canada
[3] Univ Saskatchewan, Sch Publ Hlth, Vaccinol & Immunotherapeut Program, Saskatoon, SK S7N 2Z4, Canada
[4] Prairie Diagnost Serv Inc, Saskatoon, SK S7N 5B4, Canada
来源
VIRUSES-BASEL | 2019年 / 11卷 / 02期
关键词
influenza A virus; H5N1; H7N9; pathogenesis in mice; RIG-I; INFECTION; RESPONSES; INDUCTION; CYTOKINE; EFFICACY; ARTICLE; VACCINE;
D O I
10.3390/v11020193
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Highly pathogenic avian influenza (HPAI) H5N1 and low pathogenic avian influenza (LPAI) H7N9 viruses pose a severe threat to public health through zoonotic infection, causing severe respiratory disease in humans. While HPAI H5N1 human infections have typically been reported in Asian countries, avian H7N9 human infections have been reported mainly in China. However, Canada reported a case of fatal human infection by the HPAI H5N1 virus in 2014, and two cases of human illness associated with avian H7N9 virus infection in 2015. While the genomes of the causative viruses A/Alberta/01/2014 (H5N1) (AB14 (H5N1)) and A/British Columbia/1/2015 (H7N9) (BC15 (H7N9)) are reported, the isolates had not been evaluated for their pathogenicity in animal models. In this study, we characterized the pathogenicity of AB14 (H5N1) and BC15 (H7N9) and found that both strain isolates are highly lethal in mice. AB14 (H5N1) caused systemic viral infection and erratic proinflammatory cytokine gene expression in different organs. In contrast, BC15 (H7N9) replicated efficiently only in the respiratory tract, and was a potent inducer for proinflammatory cytokine genes in the lungs. Our study provides experimental evidence to complement the specific human case reports and animal models for evaluating vaccine and antiviral candidates against potential influenza pandemics.
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页数:13
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