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Hulme KD, Karawita AC, Pegg C, Bunte MJ, Bielefeldt-Ohmann H, Bloxham CJ, Van den Hoecke S, Setoh YX, Vrancken B, Spronken M, Steele LE, Verzele NA, Upton KR, Khromykh AA, Chew KY, Sukkar M, Phipps S, Short KR. A paucigranulocytic asthma host environment promotes the emergence of virulent influenza viral variants. eLife 2021; 10:61803. [PMID: 33588989 PMCID: PMC7886327 DOI: 10.7554/elife.61803] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 01/23/2021] [Indexed: 12/12/2022] Open
Abstract
Influenza virus has a high mutation rate, such that within one host different viral variants can emerge. Evidence suggests that influenza virus variants are more prevalent in pregnant and/or obese individuals due to their impaired interferon response. We have recently shown that the non-allergic, paucigranulocytic subtype of asthma is associated with impaired type I interferon production. Here, we seek to address if this is associated with an increased emergence of influenza virus variants. Compared to controls, mice with paucigranulocytic asthma had increased disease severity and an increased emergence of influenza virus variants. Specifically, PB1 mutations exclusively detected in asthmatic mice were associated with increased polymerase activity. Furthermore, asthmatic host-derived virus led to increased disease severity in wild-type mice. Taken together, these data suggest that at least a subset of patients with asthma may be more susceptible to severe influenza and may be a possible source of new influenza virus variants.
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Affiliation(s)
- Katina D Hulme
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Anjana C Karawita
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Cassandra Pegg
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Myrna Jm Bunte
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Helle Bielefeldt-Ohmann
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Australia.,School of Veterinary Science, The University of Queensland, Brisbane, Australia
| | - Conor J Bloxham
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
| | - Silvie Van den Hoecke
- VIB-UGent Center for Medical Biotechnology, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Yin Xiang Setoh
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Australia.,Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Bram Vrancken
- KU Leuven, Department of Microbiology and Immunology, Rega Institute, Laboratory of Evolutionary and Computational Virology, Leuven, Belgium
| | | | - Lauren E Steele
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Nathalie Aj Verzele
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Kyle R Upton
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Alexander A Khromykh
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Australia
| | - Keng Yih Chew
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Maria Sukkar
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Australia; Woolcock Institute of Medical Research, Sydney Medical School, University of Sydney, NSW, Australia
| | - Simon Phipps
- Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Australia.,QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Kirsty R Short
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Australia
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