Influenza A virus PB1-F2 protein: An ambivalent innate immune modulator and virulence factor.


Journal

Journal of leukocyte biology
ISSN: 1938-3673
Titre abrégé: J Leukoc Biol
Pays: England
ID NLM: 8405628

Informations de publication

Date de publication:
05 2020
Historique:
received: 15 12 2019
revised: 23 03 2020
accepted: 24 03 2020
pubmed: 24 4 2020
medline: 5 11 2020
entrez: 24 4 2020
Statut: ppublish

Résumé

Influenza A virus (IAV) causes not only seasonal respiratory illness, but also outbreaks of more severe disease and pandemics when novel strains emerge as a result of reassortment or interspecies transmission. PB1-F2 is an IAV protein expressed from the second open reading frame of PB1 gene. Small as it is, PB1-F2 is a critical virulence factor. Multiple key amino acid residues and motifs of PB1-F2 have been shown to influence the virulence of IAV in a strain- and host-specific manner, plausibly through the induction of apoptotic cell death, modulation of type I IFN response, activation of inflammasome, and facilitation of secondary bacterial infection. However, the exact role of PB1-F2 in IAV pathogenesis remains unexplained. Through reanalysis of the current literature, we redefine PB1-F2 as an ambivalent innate immune modulator that determines IAV infection outcome through induction of immune cell death, differential modulation of early- and late-type I IFN response, and promotion of pathogenic inflammation. PB1-F2 functions both intracellularly and extracellularly. Further investigations of the mechanistic details of PB1-F2 action will shed new light on immunopathogenesis of IAV infection.

Identifiants

pubmed: 32323899
doi: 10.1002/JLB.4MR0320-206R
doi:

Substances chimiques

PB1-F2 protein, Influenza A virus 0
Viral Proteins 0
Virulence Factors 0

Types de publication

Journal Article Research Support, Non-U.S. Gov't Review

Langues

eng

Sous-ensembles de citation

IM

Pagination

763-771

Informations de copyright

©2020 Society for Leukocyte Biology.

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Auteurs

Pak-Hin Hinson Cheung (PH)

School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong.

Tak-Wang Terence Lee (TT)

School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong.

Chi-Ping Chan (CP)

School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong.

Dong-Yan Jin (DY)

School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong.

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