期刊
CELL RESEARCH
卷 31, 期 4, 页码 395-403出版社
SPRINGERNATURE
DOI: 10.1038/s41422-021-00473-1
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资金
- National Key RD Program [2018FYA0900801, 2016YFA0502103]
- National Natural Science Foundation of China [31922004, 81772202]
- Application & Frontier Research Program of the Wuhan Government [2019020701011463]
- Hubei Innovation Team Foundation [2020CFA015]
The upcoming flu season in the Northern Hemisphere coinciding with the COVID-19 pandemic poses a potential threat to public health. Research shows that influenza A virus infection significantly enhances the infectivity of SARS-CoV-2, leading to increased viral load and more severe lung damage in coinfected individuals. Preventing influenza A infection is crucial in controlling the spread of COVID-19.
The upcoming flu season in the Northern Hemisphere merging with the current COVID-19 pandemic raises a potentially severe threat to public health. Through experimental coinfection with influenza A virus (IAV) and either pseudotyped or live SARS-CoV-2 virus, we found that IAV preinfection significantly promoted the infectivity of SARS-CoV-2 in a broad range of cell types. Remarkably, in vivo, increased SARS-CoV-2 viral load and more severe lung damage were observed in mice coinfected with IAV. Moreover, such enhancement of SARS-CoV-2 infectivity was not observed with several other respiratory viruses, likely due to a unique feature of IAV to elevate ACE2 expression. This study illustrates that IAV has a unique ability to aggravate SARS-CoV-2 infection, and thus, prevention of IAV infection is of great significance during the COVID-19 pandemic.
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