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Rasmussen AL, Gronvall GK, Lowen AC, Goodrum F, Alwine J, Andersen KG, Anthony SJ, Baines J, Banerjee A, Broadbent AJ, Brooke CB, Campos SK, Caposio P, Casadevall A, Chan GC, Cliffe AR, Collins-McMillen D, Connell N, Damania B, Daugherty MD, Debbink K, Dermody TS, DiMaio D, Duprex WP, Emerman M, Galloway DA, Garry RF, Goldstein SA, Greninger AL, Hartman AL, Hogue BG, Horner SM, Hotez PJ, Jung JU, Kamil JP, Karst SM, Laimins L, Lakdawala SS, Landais I, Letko M, Lindenbach B, Liu SL, Luftig M, McFadden G, Mehle A, Morrison J, Moscona A, Mühlberger E, Munger J, Münger K, Murphy E, Neufeldt CJ, Nikolich JZ, O'Connor CM, Pekosz A, Permar SR, Pfeiffer JK, Popescu SV, Purdy JG, Racaniello VR, Rice CM, Runstadler JA, Sapp MJ, Scott RS, Smith GA, Sorrell EM, Speranza E, Streblow D, Tibbetts SA, Toth Z, Van Doorslaer K, Weiss SR, White EA, White TM, Wobus CE, Worobey M, Yamaoka S, Yurochko A. Correction for Rasmussen et al., "Virology-the path forward". J Virol 2024; 98:e0007424. [PMID: 38334328 PMCID: PMC10949460 DOI: 10.1128/jvi.00074-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024] Open
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2
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Rockey NC, Le Sage V, Marr LC, Lakdawala SS. Seasonal influenza viruses decay more rapidly at intermediate humidity in droplets containing saliva compared to respiratory mucus. Appl Environ Microbiol 2024; 90:e0201023. [PMID: 38193683 PMCID: PMC10880610 DOI: 10.1128/aem.02010-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 11/27/2023] [Indexed: 01/10/2024] Open
Abstract
Expulsions of virus-laden aerosols or droplets from the oral and nasal cavities of an infected host are an important source of onward respiratory virus transmission. However, the presence of infectious influenza virus in the oral cavity during infection has not been widely considered, and thus, little work has explored the environmental persistence of influenza virus in oral cavity expulsions. Using the ferret model, we detected infectious virus in the nasal and oral cavities, suggesting that the virus can be expelled into the environment from both anatomical sites. We also assessed the stability of two influenza A viruses (H1N1 and H3N2) in droplets of human saliva or respiratory mucus over a range of relative humidities. We observed that influenza virus infectivity decays rapidly in saliva droplets at intermediate relative humidity, while viruses in airway surface liquid droplets retain infectivity. Virus inactivation was not associated with bulk protein content, salt content, or droplet drying time. Instead, we found that saliva droplets exhibited distinct inactivation kinetics during the wet and dry phases at intermediate relative humidity, and droplet residue morphology may lead to the elevated first-order inactivation rate observed during the dry phase. Additionally, distinct differences in crystalline structure and nanobead localization were observed between saliva and airway surface liquid droplets. Together, our work demonstrates that different respiratory fluids exhibit unique virus persistence profiles and suggests that influenza viruses expelled from the oral cavity may contribute to virus transmission in low- and high-humidity environments.IMPORTANCEDetermining how long viruses persist in the environment is important for mitigating transmission risk. Expelled infectious droplets and aerosols are composed of respiratory fluids, including saliva and complex mucus mixtures, but how well influenza viruses survive in such fluids is largely unknown. Here, we find that infectious influenza virus is present in the oral cavity of infected ferrets, suggesting that saliva-containing expulsions can play a role in onward transmission. Additionally, influenza virus in droplets composed of saliva degrades more rapidly than virus within respiratory mucus. Droplet composition impacts the crystalline structure and virus localization in dried droplets. These results suggest that viruses from distinct sites in the respiratory tract could have variable persistence in the environment, which will impact viral transmission fitness.
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Affiliation(s)
- Nicole C. Rockey
- Department of Microbiology and Molecular Genetics, The University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, The University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Linsey C. Marr
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, USA
| | - Seema S. Lakdawala
- Department of Microbiology and Molecular Genetics, The University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
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Rasmussen AL, Gronvall GK, Lowen AC, Goodrum F, Alwine J, Andersen KG, Anthony SJ, Baines J, Banerjee A, Broadbent AJ, Brooke CB, Campos SK, Caposio P, Casadevall A, Chan GC, Cliffe AR, Collins-McMillen D, Connell N, Damania B, Daugherty MD, Debbink K, Dermody TS, DiMaio D, Duprex WP, Emerman M, Galloway DA, Garry RF, Goldstein SA, Greninger AL, Hartman AL, Hogue BG, Horner SM, Hotez PJ, Jung JU, Kamil JP, Karst SM, Laimins L, Lakdawala SS, Landais I, Letko M, Lindenbach B, Liu SL, Luftig M, McFadden G, Mehle A, Morrison J, Moscona A, Mühlberger E, Munger J, Münger K, Murphy E, Neufeldt CJ, Nikolich JZ, O'Connor CM, Pekosz A, Permar SR, Pfeiffer JK, Popescu SV, Purdy JG, Racaniello VR, Rice CM, Runstadler JA, Sapp MJ, Scott RS, Smith GA, Sorrell EM, Speranza E, Streblow D, Tibbetts SA, Toth Z, Van Doorslaer K, Weiss SR, White EA, White TM, Wobus CE, Worobey M, Yamaoka S, Yurochko A. Virology-the path forward. J Virol 2024; 98:e0179123. [PMID: 38168672 PMCID: PMC10804978 DOI: 10.1128/jvi.01791-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024] Open
Abstract
In the United States (US), biosafety and biosecurity oversight of research on viruses is being reappraised. Safety in virology research is paramount and oversight frameworks should be reviewed periodically. Changes should be made with care, however, to avoid impeding science that is essential for rapidly reducing and responding to pandemic threats as well as addressing more common challenges caused by infectious diseases. Decades of research uniquely positioned the US to be able to respond to the COVID-19 crisis with astounding speed, delivering life-saving vaccines within a year of identifying the virus. We should embolden and empower this strength, which is a vital part of protecting the health, economy, and security of US citizens. Herein, we offer our perspectives on priorities for revised rules governing virology research in the US.
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Affiliation(s)
- Angela L. Rasmussen
- Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, Canada
- Department of Biochemistry, Microbiology, and Immunology, University of Saskatchewan, Saskatoon, Canada
- Department of Ecology and Evolution, Stony Brook University, Stony Brook, New York, USA
| | - Gigi K. Gronvall
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Anice C. Lowen
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Felicia Goodrum
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
| | - James Alwine
- Department of Cancer Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Kristian G. Andersen
- Department of Immunology and Microbiology, Scripps Research, La Jolla, California, USA
| | - Simon J. Anthony
- Department of Pathology, Microbiology, and Immunology, University of California, Davis, Davis, California, USA
| | - Joel Baines
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York, USA
| | - Arinjay Banerjee
- Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, Canada
| | - Andrew J. Broadbent
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland, USA
| | - Christopher B. Brooke
- Department of Microbiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Samuel K. Campos
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
| | - Patrizia Caposio
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Arturo Casadevall
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Gary C. Chan
- Department of Microbiology and Immunology, SUNY Upstate Medical Center, Syracuse, New York, USA
| | - Anna R. Cliffe
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
| | | | - Nancy Connell
- Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Blossom Damania
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Matthew D. Daugherty
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, USA
| | - Kari Debbink
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Terence S. Dermody
- Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Daniel DiMaio
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut, USA
| | - W. Paul Duprex
- Center for Vaccine Research, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Michael Emerman
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Denise A. Galloway
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Robert F. Garry
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, Louisiana, USA
| | - Stephen A. Goldstein
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Alexander L. Greninger
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Amy L. Hartman
- Department of Infectious Diseases and Microbiology, University of Pittsburgh School of Public Health, Pittsburgh, Pennsylvania, USA
| | - Brenda G. Hogue
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
| | - Stacy M. Horner
- Department of Integrative Immunobiology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Peter J. Hotez
- Department of Pediatrics, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, USA
- Department of Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Jae U. Jung
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Jeremy P. Kamil
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center Shreveport, Shreveport, Louisiana, USA
| | - Stephanie M. Karst
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, USA
| | - Lou Laimins
- Department of Microbiology, Ohio State University, Wooster, Ohio, USA
| | - Seema S. Lakdawala
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Igor Landais
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Michael Letko
- Paul G. Allen School for Global Health, Washington State University, Pullman, Washington, USA
| | - Brett Lindenbach
- Department of Microbial Pathogenesis, Yale University, New Haven, USA
| | - Shan-Lu Liu
- Department of Microbiology, Ohio State University, Wooster, Ohio, USA
- Viruses and Emerging Pathogens Program, Infectious Diseases Institute, Ohio State University, Wooster, Ohio, USA
| | - Micah Luftig
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Grant McFadden
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
| | - Andrew Mehle
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Juliet Morrison
- Department of Microbiology and Plant Pathology, University of California, Riverside, Riverside, California, USA
| | - Anne Moscona
- Department of Microbiology and Immunology, Columbia University, New York, New York, USA
- Department of Physiology, Columbia University, New York, New York, USA
- Department of Biophysics, Columbia University, New York, New York, USA
| | - Elke Mühlberger
- Department of Virology, Immunology, and Microbiology, Boston University, Boston, Massachusetts, USA
| | - Joshua Munger
- Department of Biochemistry and Biophysics, University of Rochester, Rochester, New York, USA
| | - Karl Münger
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Eain Murphy
- Department of Microbiology and Immunology, SUNY Upstate Medical Center, Syracuse, New York, USA
| | | | - Janko Z. Nikolich
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
- Aegis Consortium for a Pandemic-Free Future, University of Arizona, Tucson, Arizona, USA
| | | | - Andrew Pekosz
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Sallie R. Permar
- Department of Pediatrics, Weill Cornell Medicine, New York, New York, USA
| | - Julie K. Pfeiffer
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Saskia V. Popescu
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - John G. Purdy
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
| | - Vincent R. Racaniello
- Department of Microbiology and Immunology, Columbia University, New York, New York, USA
| | - Charles M. Rice
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, New York, USA
| | - Jonathan A. Runstadler
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine at Tufts University, North Grafton, Massachusetts, USA
| | - Martin J. Sapp
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center Shreveport, Shreveport, Louisiana, USA
| | - Rona S. Scott
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center Shreveport, Shreveport, Louisiana, USA
| | - Gregory A. Smith
- Department of Microbiology, Ohio State University, Wooster, Ohio, USA
| | - Erin M. Sorrell
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Emily Speranza
- Florida Research and Innovation Center, Cleveland Clinic Lerner Research Institute, Port St. Lucie, Florida, USA
| | - Daniel Streblow
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Scott A. Tibbetts
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, USA
| | - Zsolt Toth
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | | | - Susan R. Weiss
- Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Elizabeth A. White
- Department of Otorhinolaryngology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Timothy M. White
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
| | - Christiane E. Wobus
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Michael Worobey
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, USA
| | - Satoko Yamaoka
- Department of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
| | - Andrew Yurochko
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center Shreveport, Shreveport, Louisiana, USA
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Le Sage V, Lowen AC, Lakdawala SS. Block the Spread: Barriers to Transmission of Influenza Viruses. Annu Rev Virol 2023; 10:347-370. [PMID: 37308086 DOI: 10.1146/annurev-virology-111821-115447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Respiratory viruses, such as influenza viruses, cause significant morbidity and mortality worldwide through seasonal epidemics and sporadic pandemics. Influenza viruses transmit through multiple modes including contact (either direct or through a contaminated surface) and inhalation of expelled aerosols. Successful human to human transmission requires an infected donor who expels virus into the environment, a susceptible recipient, and persistence of the expelled virus within the environment. The relative efficiency of each mode can be altered by viral features, environmental parameters, donor and recipient host characteristics, and viral persistence. Interventions to mitigate transmission of influenza viruses can target any of these factors. In this review, we discuss many aspects of influenza virus transmission, including the systems to study it, as well as the impact of natural barriers and various nonpharmaceutical and pharmaceutical interventions.
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Affiliation(s)
- Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Anice C Lowen
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, USA;
| | - Seema S Lakdawala
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, USA;
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French AJ, Rockey NC, Le Sage V, Mueller Brown K, Shephard MJ, Frizzell S, Myerburg MM, Hiller NL, Lakdawala SS. Detection of influenza virus and Streptococcus pneumoniae in air sampled from co-infected ferrets and analysis of their influence on pathogen stability. mSphere 2023; 8:e0003923. [PMID: 37255295 PMCID: PMC10449498 DOI: 10.1128/msphere.00039-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 04/12/2023] [Indexed: 06/01/2023] Open
Abstract
Secondary infection with Streptococcus pneumoniae has contributed significantly to morbidity and mortality during multiple influenza virus pandemics and remains a common threat today. During a concurrent infection, both pathogens can influence the transmission of each other, but the mechanisms behind this are unclear. In this study, condensation air sampling and cyclone bioaerosol sampling were performed using ferrets first infected with the 2009 H1N1 pandemic influenza virus (H1N1pdm09) and secondarily infected with S. pneumoniae strain D39 (Spn). We detected viable pathogens and microbial nucleic acid in expelled aerosols from co-infected ferrets, suggesting that these microbes could be present in the same respiratory expulsions. To assess whether microbial communities impact pathogen stability within an expelled droplet, we performed experiments measuring viral and bacterial persistence in 1 µL droplets. We observed that H1N1pdm09 stability was unchanged in the presence of Spn. Further, Spn stability was moderately increased in the presence of H1N1pdm09, although the degree of stabilization differed between airway surface liquid collected from individual patient cultures. These findings are the first to collect both pathogens from the air and in doing so, they provide insight into the interplay between these pathogens and their hosts.IMPORTANCEThe impact of microbial communities on transmission fitness and environmental persistence is under-studied. Environmental stability of microbes is crucial to identifying transmission risks and mitigation strategies, such as removal of contaminated aerosols and decontamination of surfaces. Co-infection with S. pneumoniae is very common during influenza virus infection, but little work has been done to understand whether S. pneumoniae alters stability of influenza virus, or vice versa, in a relevant system. Here, we demonstrate that influenza virus and S. pneumoniae are expelled by co-infected hosts. Our stability assays did not reveal any impact of S. pneumoniae on influenza virus stability, but did show a trend towards increased stability of S. pneumoniae in the presence of influenza viruses. Future work characterizing environmental persistence of viruses and bacteria should include microbially complex solutions to better mimic physiologically relevant conditions.
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Affiliation(s)
- Andrea J. French
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Nicole C. Rockey
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Karina Mueller Brown
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
| | - Meredith J. Shephard
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Sheila Frizzell
- Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Mike M. Myerburg
- Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - N. Luisa Hiller
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
| | - Seema S. Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, USA
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Qian Z, Morris DH, Avery A, Kormuth KA, Le Sage V, Myerburg MM, Lloyd-Smith JO, Marr LC, Lakdawala SS. Variability in Donor Lung Culture and Relative Humidity Impact the Stability of 2009 Pandemic H1N1 Influenza Virus on Nonporous Surfaces. Appl Environ Microbiol 2023:e0063323. [PMID: 37404191 PMCID: PMC10370307 DOI: 10.1128/aem.00633-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023] Open
Abstract
Respiratory viruses can be transmitted by multiple modes, including contaminated surfaces, commonly referred to as fomites. Efficient fomite transmission requires that a virus remain infectious on a given surface material over a wide range of environmental conditions, including different relative humidities. Prior work examining the stability of influenza viruses on surfaces has relied upon virus grown in media or eggs, which does not mimic the composition of virus-containing droplets expelled from the human respiratory tract. In this study, we examined the stability of the 2009 pandemic H1N1 (H1N1pdm09) virus on a variety of nonporous surface materials at four different humidities. Importantly, we used virus grown in primary human bronchial epithelial cell (HBE) cultures from different donors to recapitulate the physiological microenvironment of expelled viruses. We observed rapid inactivation of H1N1pdm09 on copper under all experimental conditions. In contrast to copper, viruses were stable on polystyrene plastic, stainless steel, aluminum, and glass, at multiple relative humidities, but greater decay on acrylonitrile butadiene styrene (ABS) plastic was observed at short time points. However, the half-lives of viruses at 23% relative humidity were similar among noncopper surfaces and ranged from 4.5 to 5.9 h. Assessment of H1N1pdm09 longevity on nonporous surfaces revealed that virus persistence was governed more by differences among HBE culture donors than by surface material. Our findings highlight the potential role of an individual's respiratory fluid on viral persistence and could help explain heterogeneity in transmission dynamics. IMPORTANCE Seasonal epidemics and sporadic pandemics of influenza cause a large public health burden. Although influenza viruses disseminate through the environment in respiratory secretions expelled from infected individuals, they can also be transmitted by contaminated surfaces where virus-laden expulsions can be deposited. Understanding virus stability on surfaces within the indoor environment is critical to assessing influenza transmission risk. We found that influenza virus stability is affected by the host respiratory secretion in which the virus is expelled, the surface material on which the droplet lands, and the ambient relative humidity of the environment. Influenza viruses can remain infectious on many common surfaces for prolonged periods, with half-lives of 4.5 to 5.9 h. These data imply that influenza viruses are persistent in indoor environments in biologically relevant matrices. Decontamination and engineering controls should be used to mitigate influenza virus transmission.
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Affiliation(s)
- Zhihong Qian
- Tsinghua University School of Medicine, Beijing, China
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Dylan H Morris
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, USA
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, USA
| | - Annika Avery
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Karen A Kormuth
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Michael M Myerburg
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - James O Lloyd-Smith
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, USA
| | - Linsey C Marr
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
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Le Sage V, Kanarek JP, Lakdawala SS, Lee N. Local changes in viral RNA sequence drive global changes in influenza nucleoprotein binding. J Med Virol 2023; 95:e28896. [PMID: 37386887 PMCID: PMC10878429 DOI: 10.1002/jmv.28896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 06/03/2023] [Indexed: 07/01/2023]
Abstract
The genome of influenza A viruses (IAV) consists of eight negative-sense RNA segments that are coated by viral nucleoprotein (NP). Until recently, it was assumed that NP binds viral genomic RNA (vRNA) uniformly along the entire segment. However, genome-wide studies have revised the original model in that NP instead binds preferentially to certain regions of vRNA, while others are depleted for NP binding. Even strains with high sequence similarity exhibit distinct NP-binding profiles. Thus, it remains unknown how NP-binding specificity to vRNA is established. Here we introduced nucleotide changes to vRNA to examine whether primary sequence can affect NP binding. Our findings demonstrate that NP binding is indeed susceptible to sequence alterations, as NP peaks can be lost or appear de novo at mutated sites. Unexpectedly, nucleotide changes not only affect NP binding locally at the site of mutation, but also impact NP binding at distal regions that have not been modified. Taken together, our results suggest that NP binding is not regulated by primary sequence alone, but that a network formed by multiple segments governs the deposition of NP on vRNA.
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Affiliation(s)
- Valerie Le Sage
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Jack P. Kanarek
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Seema S. Lakdawala
- Emory University School of Medicine, Department of Microbiology and Immunology, 1510 Clifton Rd., Atlanta, GA 30322
| | - Nara Lee
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
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8
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Runstadler JA, Lowen AC, Kayali G, Tompkins SM, Albrecht RA, Fouchier RAM, Stallknecht DE, Lakdawala SS, Goodrum FD, Casadevall A, Enquist LW, Alwine JC, Imperiale MJ, Schultz-Cherry S, Webby RJ. Field Research Is Essential to Counter Virological Threats. J Virol 2023; 97:e0054423. [PMID: 37166327 DOI: 10.1128/jvi.00544-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023] Open
Abstract
The interface between humans and wildlife is changing and, with it, the potential for pathogen introduction into humans has increased. Avian influenza is a prominent example, with an ongoing outbreak showing the unprecedented expansion of both geographic and host ranges. Research in the field is essential to understand this and other zoonotic threats. Only by monitoring dynamic viral populations and defining their biology in situ can we gather the information needed to ensure effective pandemic preparation.
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Affiliation(s)
- Jonathan A Runstadler
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, Boston, Massachusetts, USA
- Center for Research on Influenza Pathogenesis and Transmission (CRIPT) CEIRR, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Anice C Lowen
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, USA
- Emory Center of Excellence for Influenza Research and Response (Emory-CEIRR), Atlanta, Georgia, USA
| | - Ghazi Kayali
- Human-Link DMCC, Dubai, UAE
- University of Texas School of Public Health, Houston, Texas, USA
- St Jude Center of Excellence for Influenza Research and Response (SJ-CEIRR), Memphis, Tennessee, USA
| | - S Mark Tompkins
- Center for Vaccines and Immunology, University of Georgia, Athens, Georgia, USA
- Center for Influenza Disease and Emergence Research (CIDER) CEIRR, Athens, Georgia, USA
| | - Randy A Albrecht
- Center for Research on Influenza Pathogenesis and Transmission (CRIPT) CEIRR, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Ron A M Fouchier
- Center for Research on Influenza Pathogenesis and Transmission (CRIPT) CEIRR, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Department of Viroscience, Erasmus Medical Center, Rotterdam, Netherlands
| | - David E Stallknecht
- St Jude Center of Excellence for Influenza Research and Response (SJ-CEIRR), Memphis, Tennessee, USA
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - Seema S Lakdawala
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, USA
- Penn Center of Excellence for Influenza Research and Response (Penn-CEIRR), Philadelphia, Pennsylvania, USA
| | - Felicia D Goodrum
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
| | - Arturo Casadevall
- Department of Molecular Microbiology and Immunology, Johns Hopkins School of Public Health, Baltimore, Maryland, USA
| | - Lynn W Enquist
- Department of Molecular Biology, Princeton University, Princeton, New Jersey, USA
| | - James C Alwine
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Michael J Imperiale
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Stacey Schultz-Cherry
- St Jude Center of Excellence for Influenza Research and Response (SJ-CEIRR), Memphis, Tennessee, USA
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Richard J Webby
- St Jude Center of Excellence for Influenza Research and Response (SJ-CEIRR), Memphis, Tennessee, USA
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, Tennessee, USA
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9
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French AJ, Longest AK, Pan J, Vikesland PJ, Duggal NK, Marr LC, Lakdawala SS. Environmental Stability of Enveloped Viruses Is Impacted by Initial Volume and Evaporation Kinetics of Droplets. mBio 2023; 14:e0345222. [PMID: 37036343 PMCID: PMC10128059 DOI: 10.1128/mbio.03452-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2023] Open
Abstract
Efficient spread of respiratory viruses requires the virus to maintain infectivity in the environment. Environmental stability of viruses can be influenced by many factors, including temperature and humidity. Our study measured the impact of initial droplet volume (50, 5, and 1 μL) and relative humidity (RH; 40%, 65%, and 85%) on the stability of influenza A virus, bacteriophage Phi6 (a common surrogate for enveloped viruses), and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) under a limited set of conditions. Our data suggest that the drying time required for the droplets to reach quasi-equilibrium (i.e., a plateau in mass) varied with RH and initial droplet volume. The macroscale physical characteristics of the droplets at quasi-equilibrium varied with RH but not with the initial droplet volume. Virus decay rates differed between the wet phase, while the droplets were still evaporating, and the dry phase. For Phi6, decay was faster in the wet phase than in the dry phase under most conditions. For H1N1pdm09, decay rates between the two phases were distinct and initial droplet volume had an effect on virus viability within 2 h. Importantly, we observed differences in virus decay characteristics by droplet size and virus. In general, influenza virus and SARS-CoV-2 decayed similarly, whereas Phi6 decayed more rapidly under certain conditions. Overall, this study suggests that virus decay in media is related to the extent of droplet evaporation, which is controlled by RH. Importantly, accurate assessment of transmission risk requires the use of physiologically relevant droplet volumes and careful consideration of the use of surrogates. IMPORTANCE During the COVID-19 pandemic, policy decisions were being driven by virus stability experiments with SARS-CoV-2 in different droplet volumes under various humidity conditions. Our study, the first of its kind, provides a model for the decay of multiple enveloped RNA viruses in cell culture medium deposited in 50-, 5-, and 1-μL droplets at 40%, 65%, and 85% RH over time. The results of our study indicate that determination of half-lives for emerging pathogens in large droplets may overestimate transmission risk for contaminated surfaces, as observed during the COVID-19 pandemic. Our study implicates the need for the use of physiologically relevant droplet sizes with use of relevant surrogates in addition to what is already known about the importance of physiologically relevant media for risk assessment of future emerging pathogens.
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Affiliation(s)
- Andrea J French
- Department of Microbiology & Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Alexandra K Longest
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, USA
| | - Jin Pan
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, USA
| | - Peter J Vikesland
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, USA
| | - Nisha K Duggal
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, USA
| | - Linsey C Marr
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, USA
| | - Seema S Lakdawala
- Department of Microbiology & Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
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10
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Lowen AC, Casadevall A, Alwine JC, Enquist LW, Goodrum FD, Imperiale MJ, Lakdawala SS. Oversight of Pathogen Research Must Be Carefully Calibrated and Clearly Defined. J Virol 2023; 97:e0017623. [PMID: 36811609 PMCID: PMC10062122 DOI: 10.1128/jvi.00176-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Affiliation(s)
- Anice C. Lowen
- Department of Microbiology and Immunology, Emory University School of Medicine, Baltimore, Maryland, USA
| | - Arturo Casadevall
- Department of Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA
| | - James C. Alwine
- Department of Cancer Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
| | - Lynn W. Enquist
- Department of Molecular Biology, Princeton University, Princeton, New Jersey, USA
| | - Felicia D. Goodrum
- Department of Immunobiology, University of Arizona, Tucson, Arizona, USA
| | - Michael J. Imperiale
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Seema S. Lakdawala
- Department of Microbiology and Immunology, Emory University School of Medicine, Baltimore, Maryland, USA
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11
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French AJ, Rockey NC, Sage VL, Brown KM, Shephard MJ, Frizzell S, Myerburg MM, Hiller NL, Lakdawala SS. Detection of Influenza virus and Streptococcus pneumoniae in air sampled from co-infected ferrets and analysis of their influence on pathogen stability. bioRxiv 2023:2023.02.24.529988. [PMID: 36865236 PMCID: PMC9980167 DOI: 10.1101/2023.02.24.529988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
Secondary infection with Streptococcus pneumoniae has contributed significantly to morbidity and mortality during multiple influenza virus pandemics and remains a common threat today. During a concurrent infection, both pathogens can influence the transmission of each other, but the mechanisms behind this are unclear. In this study, condensation air sampling and cyclone bioaerosol sampling were performed using ferrets first infected with the 2009 H1N1 pandemic influenza virus (H1N1pdm09) and secondarily infected with S. pneumoniae strain D39 (Spn). We detected viable pathogens and microbial nucleic acid in expelled aerosols from co-infected ferrets, suggesting that these microbes could be present in the same respiratory expulsions. To assess whether microbial communities impact pathogen stability within an expelled droplet, we performed experiments measuring viral and bacterial persistence in 1 μL droplets. We observed that H1N1pdm09 stability was unchanged in the presence of Spn. Further, Spn stability was moderately increased in the presence of H1N1pdm09, although the degree of stabilization differed between airways surface liquid collected from individual patient cultures. These findings are the first to collect both pathogens from the air and in doing so, they provide insight into the interplay between these pathogens and their hosts. Importance The impact of microbial communities on transmission fitness and environmental persistence is under-studied. Environmental stability of microbes is crucial to identifying transmission risks and mitigation strategies, such as removal of contaminated aerosols and decontamination of surfaces. Co-infection with S. pneumoniae is very common during influenza virus infection, but little work has been done to understand whether S. pneumoniae alters stability of influenza virus, or vice versa, in a relevant system. Here, we demonstrate that influenza virus and S. pneumoniae are expelled by co-infected hosts. Our stability assays did not reveal any impact of S. pneumoniae on influenza virus stability, and a trend towards increased stability of S. pneumoniae in the presence of influenza viruses. Future work characterizing environmental persistence of viruses and bacteria should include microbially-complex solutions to better mimic physiologically relevant conditions.
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Affiliation(s)
- Andrea J French
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Nicole C Rockey
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Karina Mueller Brown
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Meredith J Shephard
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sheila Frizzell
- Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Mike M Myerburg
- Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - N Luisa Hiller
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
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12
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Arevalo CP, Bolton MJ, Le Sage V, Ye N, Furey C, Muramatsu H, Alameh MG, Pardi N, Drapeau EM, Parkhouse K, Garretson T, Morris JS, Moncla LH, Tam YK, Fan SHY, Lakdawala SS, Weissman D, Hensley SE. A multivalent nucleoside-modified mRNA vaccine against all known influenza virus subtypes. Science 2022; 378:899-904. [PMID: 36423275 PMCID: PMC10790309 DOI: 10.1126/science.abm0271] [Citation(s) in RCA: 80] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Seasonal influenza vaccines offer little protection against pandemic influenza virus strains. It is difficult to create effective prepandemic vaccines because it is uncertain which influenza virus subtype will cause the next pandemic. In this work, we developed a nucleoside-modified messenger RNA (mRNA)-lipid nanoparticle vaccine encoding hemagglutinin antigens from all 20 known influenza A virus subtypes and influenza B virus lineages. This multivalent vaccine elicited high levels of cross-reactive and subtype-specific antibodies in mice and ferrets that reacted to all 20 encoded antigens. Vaccination protected mice and ferrets challenged with matched and mismatched viral strains, and this protection was at least partially dependent on antibodies. Our studies indicate that mRNA vaccines can provide protection against antigenically variable viruses by simultaneously inducing antibodies against multiple antigens.
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Affiliation(s)
- Claudia P. Arevalo
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Marcus J. Bolton
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine; Pittsburgh, PA, USA
| | - Naiqing Ye
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Colleen Furey
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Hiromi Muramatsu
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Mohamad-Gabriel Alameh
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Norbert Pardi
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Elizabeth M. Drapeau
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Kaela Parkhouse
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Tyler Garretson
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Jeffrey S. Morris
- Department of Biostatistics Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Louise H. Moncla
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center; Seattle, WA, USA
| | - Ying K. Tam
- Acuitas Therapeutics; Vancouver, BC, V6T 1Z3
| | | | - Seema S. Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine; Pittsburgh, PA, USA
- Center for Vaccine Research, University of Pittsburgh School of Medicine; Pittsburgh, PA, USA
| | - Drew Weissman
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
| | - Scott E. Hensley
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA, USA
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13
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French AJ, Longest AK, Pan J, Vikesland PJ, Duggal NK, Lakdawala SS, Marr LC. Environmental Stability of Enveloped Viruses is Impacted by the Initial Volume and Evaporation Kinetics of Droplets.. [PMID: 35923308 PMCID: PMC9347275 DOI: 10.1101/2022.07.26.501658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
AbstractEfficient spread of respiratory viruses requires the virus to maintain infectivity in the environment. Environmental stability of viruses can be influenced by many factors, including temperature and humidity. Our study measured the impact of initial droplet volume (50, 5, and 1 µL) and relative humidity (RH: 40%, 65%, and 85%) on the stability of influenza A virus, bacteriophage, Phi6, a common surrogate for enveloped viruses, and SARS-CoV-2 under a limited set of conditions. Our data suggest that the drying time required for the droplets to reach quasi-equilibrium (i.e. a plateau in mass) varied with RH and initial droplet volume. The macroscale physical characteristics of the droplets at quasi-equilibrium varied with RH but not with initial droplet volume. We observed more rapid virus decay when the droplets were still wet and undergoing evaporation, and slower decay after the droplets had dried. Initial droplet volume had a major effect on virus viability over the first few hours; whereby the decay rate of influenza virus was faster in smaller droplets. In general, influenza virus and SARS-CoV-2 decayed similarly. Overall, this study suggests that virus decay in media is closely correlated with the extent of droplet evaporation, which is controlled by RH. Taken together, these data suggest that decay of different viruses is more similar at higher RH and in smaller droplets and is distinct at lower RH and in larger droplets. Importantly, accurate assessment of transmission risk requires use of physiologically relevant droplet volumes and careful consideration of the use of surrogates.FundingNational Institute of Allergy and Infectious Diseases, National Institute of Neurological Disorders and Stroke, National Institutes of Health; Department of Health and Human Services; Flu Lab.ImportanceDuring the COVID-19 pandemic, policy decisions were being driven by virus stability experiments involving SARS-CoV-2 applied to surfaces in large droplets at various humidity conditions. The results of our study indicate that determination of half-lives for emerging pathogens in large droplets likely over-estimates transmission risk for contaminated surfaces, as occurred during the COVID-19 pandemic. Our study implicates the need for the use of physiologically relevant droplet sizes with use of relevant surrogates in addition to what is already known about the importance of physiologically relevant media for risk assessment of future emerging pathogens.
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14
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Mueller Brown K, Le Sage V, French AJ, Jones JE, Padovani GH, Avery AJ, Schultz-Cherry S, Rosch JW, Hiller NL, Lakdawala SS. Secondary infection with Streptococcus pneumoniae decreases influenza virus replication and is linked to severe disease. FEMS Microbes 2022; 3:xtac007. [PMID: 35392116 PMCID: PMC8981988 DOI: 10.1093/femsmc/xtac007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/31/2022] [Accepted: 03/02/2022] [Indexed: 11/29/2022] Open
Abstract
Secondary bacterial infection is a common complication in severe influenza virus infections. During the H1N1 pandemic of 2009, increased mortality was observed among healthy young adults due to secondary bacterial pneumonia, one of the most frequent bacterial species being Streptococcus pneumoniae (Spn). Previous studies in mice and ferrets have suggested a synergistic relationship between Spn and influenza viruses. In this study, the ferret model was used to examine whether secondary Spn infection (strains BHN97 and D39) influence replication and airborne transmission of the 2009 pandemic H1N1 virus (H1N1pdm09). Secondary infection with Spn after H1N1pdm09 infection consistently resulted in a significant decrease in viral titers in the ferret nasal washes. While secondary Spn infection appeared to negatively impact influenza virus replication, animals precolonized with Spn were equally susceptible to H1N1pdm09 airborne transmission. In line with previous work, ferrets with preceding H1N1pdm09 and secondary Spn infection had increased bacterial loads and more severe clinical symptoms as compared to animals infected with H1N1pdm09 or Spn alone. Interestingly, the donor animals that displayed the most severe clinical symptoms had reduced airborne transmission of H1N1pdm09. Based on these data, we propose an asymmetrical relationship between these two pathogens, rather than a synergistic one, since secondary bacterial infection enhances Spn colonization and pathogenesis but decreases viral titers.
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Affiliation(s)
- Karina Mueller Brown
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Bridgeside Point II, Pittsburgh, PA 15219, USA
| | - Andrea J French
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Bridgeside Point II, Pittsburgh, PA 15219, USA
| | - Jennifer E Jones
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Bridgeside Point II, Pittsburgh, PA 15219, USA
| | - Gabriella H Padovani
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Bridgeside Point II, Pittsburgh, PA 15219, USA
| | - Annika J Avery
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Bridgeside Point II, Pittsburgh, PA 15219, USA
| | - Stacey Schultz-Cherry
- Department of Infectious Diseases, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Jason W Rosch
- Department of Infectious Diseases, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - N Luisa Hiller
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Bridgeside Point II, Pittsburgh, PA 15219, USA
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15
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Samet JM, Burke TA, Lakdawala SS, Lowe JJ, Marr LC, Prather KA, Shelton-Davenport M, Volckens J. SARS-CoV-2 indoor air transmission is a threat that can be addressed with science. Proc Natl Acad Sci U S A 2021; 118:e2116155118. [PMID: 34728564 PMCID: PMC8609226 DOI: 10.1073/pnas.2116155118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2021] [Indexed: 01/09/2023] Open
Affiliation(s)
- Jonathan M Samet
- Office of the Dean, Colorado School of Public Health, Aurora, CO 80045;
| | - Thomas A Burke
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205
| | - Seema S Lakdawala
- Department of Microbiology & Molecular Genetics, University of Pittsburgh, Pittsburgh, PA 15219
| | - John J Lowe
- Department of Environmental, Agricultural & Occupational Health, University of Nebraska Medical Center, Omaha, NE 68198
| | - Linsey C Marr
- Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Kimberly A Prather
- Department of Chemistry and Biochemistry, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093
| | | | - John Volckens
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523
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16
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Abstract
The COVID-19 pandemic has revealed critical knowledge gaps in our understanding of and a need to update the traditional view of transmission pathways for respiratory viruses. The long-standing definitions of droplet and airborne transmission do not account for the mechanisms by which virus-laden respiratory droplets and aerosols travel through the air and lead to infection. In this Review, we discuss current evidence regarding the transmission of respiratory viruses by aerosols-how they are generated, transported, and deposited, as well as the factors affecting the relative contributions of droplet-spray deposition versus aerosol inhalation as modes of transmission. Improved understanding of aerosol transmission brought about by studies of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection requires a reevaluation of the major transmission pathways for other respiratory viruses, which will allow better-informed controls to reduce airborne transmission.
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Affiliation(s)
- Chia C Wang
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan 804, Republic of China.
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92037, USA
- Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan 804, Republic of China
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan 804, Republic of China
| | - Kimberly A Prather
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92037, USA.
| | - Josué Sznitman
- Department of Biomedical Engineering, Israel Institute of Technology, Haifa 32000, Israel
| | - Jose L Jimenez
- Department of Biomedical Engineering, Israel Institute of Technology, Haifa 32000, Israel
- Department of Chemistry and CIRES, University of Colorado, Boulder, CO 80309, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA
| | - Zeynep Tufekci
- School of Information and Department of Sociology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Linsey C Marr
- Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan 804, Republic of China
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061, USA
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17
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Abstract
The COVID-19 pandemic has revealed critical knowledge gaps in our understanding of and a need to update the traditional view of transmission pathways for respiratory viruses. The long-standing definitions of droplet and airborne transmission do not account for the mechanisms by which virus-laden respiratory droplets and aerosols travel through the air and lead to infection. In this Review, we discuss current evidence regarding the transmission of respiratory viruses by aerosols-how they are generated, transported, and deposited, as well as the factors affecting the relative contributions of droplet-spray deposition versus aerosol inhalation as modes of transmission. Improved understanding of aerosol transmission brought about by studies of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection requires a reevaluation of the major transmission pathways for other respiratory viruses, which will allow better-informed controls to reduce airborne transmission.
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Affiliation(s)
- Chia C Wang
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan 804, Republic of China.
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92037, USA
- Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan 804, Republic of China
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan 804, Republic of China
| | - Kimberly A Prather
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92037, USA.
| | - Josué Sznitman
- Department of Biomedical Engineering, Israel Institute of Technology, Haifa 32000, Israel
| | - Jose L Jimenez
- Department of Biomedical Engineering, Israel Institute of Technology, Haifa 32000, Israel
- Department of Chemistry and CIRES, University of Colorado, Boulder, CO 80309, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA
| | - Zeynep Tufekci
- School of Information and Department of Sociology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Linsey C Marr
- Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan 804, Republic of China
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061, USA
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18
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Jones JE, Le Sage V, Padovani GH, Calderon M, Wright ES, Lakdawala SS. Parallel evolution between genomic segments of seasonal human influenza viruses reveals RNA-RNA relationships. eLife 2021; 10:66525. [PMID: 34448455 PMCID: PMC8523153 DOI: 10.7554/elife.66525] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 08/23/2021] [Indexed: 11/22/2022] Open
Abstract
The influenza A virus (IAV) genome consists of eight negative-sense viral RNA (vRNA) segments that are selectively assembled into progeny virus particles through RNA-RNA interactions. To explore putative intersegmental RNA-RNA relationships, we quantified similarity between phylogenetic trees comprising each vRNA segment from seasonal human IAV. Intersegmental tree similarity differed between subtype and lineage. While intersegmental relationships were largely conserved over time in H3N2 viruses, they diverged in H1N1 strains isolated before and after the 2009 pandemic. Surprisingly, intersegmental relationships were not driven solely by protein sequence, suggesting that IAV evolution could also be driven by RNA-RNA interactions. Finally, we used confocal microscopy to determine that colocalization of highly coevolved vRNA segments is enriched over other assembly intermediates at the nuclear periphery during productive viral infection. This study illustrates how putative RNA interactions underlying selective assembly of IAV can be interrogated with phylogenetics. The viruses responsible for influenza evolve rapidly during infection. Changes typically emerge in two key ways: through random mutations in the genetic sequence of the virus, or by reassortment. Reassortment can occur when two or more strains infect the same cell. Once in a cell, viral particles ‘open up’ to release their genetic material so it can make copies of itself using the cell’s machinery. The new copies of the genetic material of the virus are used to make new viral particles, which then envelop the genetic material and are released from the cell to infect other cells. If several strains of a virus infect the same cell, a new viral particle may pick up genetic segments from each of the infecting strains, creating a new strain via reassortment. Several factors are known to affect the success of the reassortment process. For example, if the new strain acquires a genetic defect that hinders its replication cycle, it is likely to die out quickly. Other times, this trading of genetic information can create a strain that is more resistant to the human immune system, allowing it to sweep across the globe and cause a deadly pandemic. However, a key part of the reassortment process that still remains unclear is how genome segments from two different influenza strains recognize each other before merging together to create hybrid daughter viruses. To explore this further, Jones et al. used a technique called fluorescence microscopy. They found that genome segments that evolved along similar paths were more likely to cluster in the same area inside infected cells, and therefore, more likely to be reassorted together into a new strain during assembly of daughter viruses. This suggests that assembly may guide the evolutionary path taken by individual genomic segments. Jones et al. also looked at the evolution of different genome segments collected from patients suffering from seasonal influenza, and found that these segments had a distinct evolutionary path to those in pandemic-causing strains. This research provides new insights into the role of reassortment in the evolution of influenza viruses during infection. In particular, it suggests that how the genome segments interact with one another may have a previously unknown and important role in guiding this evolution. These insights could be used to predict future reassortment events based on evolutionary relationships between influenza virus genomic segments, and may in the future be used as part of risk assessment tools to predict the emergence of new pandemic strains.
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Affiliation(s)
- Jennifer E Jones
- Department of Microbiology & Molecular Genetics, University of Pittsburgh, Pittsburgh, United States.,Center for Evolutionary Biology and Medicine, University of Pittsburgh, Pittsburgh, United States.,Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, United States
| | - Valerie Le Sage
- Department of Microbiology & Molecular Genetics, University of Pittsburgh, Pittsburgh, United States.,Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, United States
| | - Gabriella H Padovani
- Department of Microbiology & Molecular Genetics, University of Pittsburgh, Pittsburgh, United States.,Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, United States
| | - Michael Calderon
- Department of Cell Biology, Center for Biologic Imaging, University of Pittsburgh, Pittsburgh, United States
| | - Erik S Wright
- Center for Evolutionary Biology and Medicine, University of Pittsburgh, Pittsburgh, United States.,Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, United States
| | - Seema S Lakdawala
- Department of Microbiology & Molecular Genetics, University of Pittsburgh, Pittsburgh, United States.,Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, United States
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19
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Le Sage V, Kanarek JP, Snyder DJ, Cooper VS, Lakdawala SS, Lee N. Mapping of Influenza Virus RNA-RNA Interactions Reveals a Flexible Network. Cell Rep 2021; 31:107823. [PMID: 32610124 DOI: 10.1016/j.celrep.2020.107823] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 04/20/2020] [Accepted: 06/04/2020] [Indexed: 11/25/2022] Open
Abstract
Selective assembly of influenza virus segments into virions is proposed to be mediated through intersegmental RNA-RNA interactions. Here, we developed a method called 2CIMPL that includes proximity ligation under native conditions to identify genome-wide RNA duplexes. Interactions between all eight segments were observed at multiple sites along a given segment and are concentrated at hotspots. Furthermore, synonymous nucleotide changes in a hotspot decreased the formation of RNA-RNA interactions at this site and resulted in a genome-wide rearrangement without a loss in replicative fitness. These results indicate that the viral RNA interaction network is flexible to account for nucleotide evolution. Moreover, comparative analysis of RNA-RNA interaction sites with viral nucleoprotein (NP) binding to the genome revealed that RNA junctions can also occur adjacent to NP peaks, suggesting that NP association does not exclude RNA duplex formation. Overall, 2CIMPL is a versatile technique to map in vivo RNA-RNA interactions.
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Affiliation(s)
- Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Jack P Kanarek
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Dan J Snyder
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Vaughn S Cooper
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA; Center for Vaccine Research, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA.
| | - Nara Lee
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA.
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20
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Le Sage V, Jones JE, Kormuth KA, Fitzsimmons WJ, Nturibi E, Padovani GH, Arevalo CP, French AJ, Avery AJ, Manivanh R, McGrady EE, Bhagwat AR, Lauring AS, Hensley SE, Lakdawala SS. Pre-existing heterosubtypic immunity provides a barrier to airborne transmission of influenza viruses. PLoS Pathog 2021; 17:e1009273. [PMID: 33600489 PMCID: PMC7891786 DOI: 10.1371/journal.ppat.1009273] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 01/04/2021] [Indexed: 12/04/2022] Open
Abstract
Human-to-human transmission of influenza viruses is a serious public health threat, yet the precise role of immunity from previous infections on the susceptibility to airborne infection is still unknown. Using the ferret model, we examined the roles of exposure duration and heterosubtypic immunity on influenza transmission. We demonstrate that a 48 hour exposure is sufficient for efficient transmission of H1N1 and H3N2 viruses. To test pre-existing immunity, a gap of 8–12 weeks between primary and secondary infections was imposed to reduce innate responses and ensure robust infection of donor animals with heterosubtypic viruses. We found that pre-existing H3N2 immunity did not significantly block transmission of the 2009 H1N1pandemic (H1N1pdm09) virus to immune animals. Surprisingly, airborne transmission of seasonal H3N2 influenza strains was abrogated in recipient animals with H1N1pdm09 pre-existing immunity. This protection from natural infection with H3N2 virus was independent of neutralizing antibodies. Pre-existing immunity with influenza B virus did not block H3N2 virus transmission, indicating that the protection was likely driven by the adaptive immune response. We demonstrate that pre-existing immunity can impact susceptibility to heterologous influenza virus strains, and implicate a novel correlate of protection that can limit the spread of respiratory pathogens through the air. Influenza viruses pose a major public health threat through both seasonal epidemics and sporadic pandemics. An individual’s first influenza virus infection leaves long-lasting immunity, which plays an unknown role on susceptibility to airborne transmission of new viral strains. We show that pre-existing heterosubtypic immunity against the 2009 H1N1 pandemic virus protects recipient animals from airborne transmission of a seasonal H3N2 influenza virus, which is independent of cross-neutralizing antibodies. Pre-existing immunity with influenza B viruses was not protective suggesting that this phenomenon is driven by an adaptive response. Taken together, these data indicate that pre-existing immunity is an important barrier to airborne transmission and can influence the emergence and spread of potentially pandemic viruses.
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Affiliation(s)
- Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Jennifer E. Jones
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Karen A. Kormuth
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - William J. Fitzsimmons
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Eric Nturibi
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Gabriella H. Padovani
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Claudia P. Arevalo
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Andrea J. French
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Annika J. Avery
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Richard Manivanh
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Elizabeth E. McGrady
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Amar R. Bhagwat
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Adam S. Lauring
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Scott E. Hensley
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Seema S. Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
- * E-mail:
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21
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Abstract
Traditionally, the viral replication cycle is envisioned as a single, well-defined loop with four major steps: attachment and entry into a target cell, replication of the viral genome, maturation of viral proteins and genome packaging into infectious progeny, and egress and dissemination to the next target cell. However, for many viruses, a growing body of evidence points towards extreme heterogeneity in each of these steps. In this Review, we reassess the major steps of the viral replication cycle by highlighting recent advances that show considerable variability during viral infection. First, we discuss heterogeneity in entry receptors, followed by a discussion on error-prone and low-fidelity polymerases and their impact on viral diversity. Next, we cover the implications of heterogeneity in genome packaging and assembly on virion morphology. Last, we explore alternative egress mechanisms, including tunnelling nanotubes and host microvesicles. In summary, we discuss the implications of viral phenotypic, morphological and genetic heterogeneity on pathogenesis and medicine. This Review highlights common themes and unique features that give nuance to the viral replication cycle.
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Affiliation(s)
- Jennifer E Jones
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA. .,Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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22
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Affiliation(s)
- Seema S. Lakdawala
- Department of Microbiology and Molecular Genetics, Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Vineet D. Menachery
- Department of Microbiology and Immunology, Institute for Human Infection and Immunity, World Reference Center for Emerging Viruses and Arboviruses, University of Texas Medical Branch at Galveston, Galveston, TX, USA
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23
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Affiliation(s)
| | - Seema S Lakdawala
- Department of Microbiology & Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA. .,Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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24
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Bhagwat AR, Le Sage V, Nturibi E, Kulej K, Jones J, Guo M, Tae Kim E, Garcia BA, Weitzman MD, Shroff H, Lakdawala SS. Quantitative live cell imaging reveals influenza virus manipulation of Rab11A transport through reduced dynein association. Nat Commun 2020; 11:23. [PMID: 31911620 PMCID: PMC6946661 DOI: 10.1038/s41467-019-13838-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 11/20/2019] [Indexed: 11/10/2022] Open
Abstract
Assembly of infectious influenza A viruses (IAV) is a complex process involving transport from the nucleus to the plasma membrane. Rab11A-containing recycling endosomes have been identified as a platform for intracellular transport of viral RNA (vRNA). Here, using high spatiotemporal resolution light-sheet microscopy (~1.4 volumes/second, 330 nm isotropic resolution), we quantify Rab11A and vRNA movement in live cells during IAV infection and report that IAV infection decreases speed and increases arrest of Rab11A. Unexpectedly, infection with respiratory syncytial virus alters Rab11A motion in a manner opposite to IAV, suggesting that Rab11A is a common host component that is differentially manipulated by respiratory RNA viruses. Using two-color imaging we demonstrate co-transport of Rab11A and IAV vRNA in infected cells and provide direct evidence that vRNA-associated Rab11A have altered transport. The mechanism of altered Rab11A movement is likely related to a decrease in dynein motors bound to Rab11A vesicles during IAV infection.
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Affiliation(s)
- Amar R Bhagwat
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA, 15219, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA, 15219, USA
| | - Eric Nturibi
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA, 15219, USA
| | - Katarzyna Kulej
- The Children's Hospital of Philadelphia Research Institute, 3501 Civic Center Dr., Philadelphia, PA, 19104, USA
| | - Jennifer Jones
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA, 15219, USA
| | - Min Guo
- Section on High Resolution Optical Imaging, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, 13 South Drive, Building 13, Bethesda, MD, 20892, USA
| | - Eui Tae Kim
- The Children's Hospital of Philadelphia Research Institute, 3501 Civic Center Dr., Philadelphia, PA, 19104, USA
| | - Benjamin A Garcia
- Department of Biochemistry and Biophysics, University of Pennsylvania Perelman School of Medicine, 3400 Civic Center Blvd, Building 421, Philadelphia, PA, 19104, USA
- Epigenetics Institute, University of Pennsylvania Perelman School of Medicine, 3400, Civic Center Blvd, Philadelphia, PA, 19104, USA
| | - Matthew D Weitzman
- The Children's Hospital of Philadelphia Research Institute, 3501 Civic Center Dr., Philadelphia, PA, 19104, USA
- Epigenetics Institute, University of Pennsylvania Perelman School of Medicine, 3400, Civic Center Blvd, Philadelphia, PA, 19104, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, 19104, USA
| | - Hari Shroff
- Section on High Resolution Optical Imaging, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, 13 South Drive, Building 13, Bethesda, MD, 20892, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA, 15219, USA.
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA.
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25
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Kormuth KA, Lin K, Prussin AJ, Vejerano EP, Tiwari AJ, Cox SS, Myerburg MM, Lakdawala SS, Marr LC. Influenza Virus Infectivity Is Retained in Aerosols and Droplets Independent of Relative Humidity. J Infect Dis 2019; 218:739-747. [PMID: 29878137 PMCID: PMC6057527 DOI: 10.1093/infdis/jiy221] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 04/17/2018] [Indexed: 12/18/2022] Open
Abstract
Pandemic and seasonal influenza viruses can be transmitted through aerosols and droplets, in which viruses must remain stable and infectious across a wide range of environmental conditions. Using humidity-controlled chambers, we studied the impact of relative humidity on the stability of 2009 pandemic influenza A(H1N1) virus in suspended aerosols and stationary droplets. Contrary to the prevailing paradigm that humidity modulates the stability of respiratory viruses in aerosols, we found that viruses supplemented with material from the apical surface of differentiated primary human airway epithelial cells remained equally infectious for 1 hour at all relative humidities tested. This sustained infectivity was observed in both fine aerosols and stationary droplets. Our data suggest, for the first time, that influenza viruses remain highly stable and infectious in aerosols across a wide range of relative humidities. These results have significant implications for understanding the mechanisms of transmission of influenza and its seasonality.
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Affiliation(s)
- Karen A Kormuth
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pennsylvania
| | - Kaisen Lin
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg
| | - Aaron J Prussin
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg
| | - Eric P Vejerano
- Department of Environmental Health Sciences, University of South Carolina, Columbia
| | - Andrea J Tiwari
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg
| | - Steve S Cox
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg
| | - Michael M Myerburg
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pennsylvania
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pennsylvania
| | - Linsey C Marr
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg
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26
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Lee JM, Eguia R, Zost SJ, Choudhary S, Wilson PC, Bedford T, Stevens-Ayers T, Boeckh M, Hurt AC, Lakdawala SS, Hensley SE, Bloom JD. Mapping person-to-person variation in viral mutations that escape polyclonal serum targeting influenza hemagglutinin. eLife 2019; 8:e49324. [PMID: 31452511 PMCID: PMC6711711 DOI: 10.7554/elife.49324] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 07/27/2019] [Indexed: 12/11/2022] Open
Abstract
A longstanding question is how influenza virus evolves to escape human immunity, which is polyclonal and can target many distinct epitopes. Here, we map how all amino-acid mutations to influenza's major surface protein affect viral neutralization by polyclonal human sera. The serum of some individuals is so focused that it selects single mutations that reduce viral neutralization by over an order of magnitude. However, different viral mutations escape the sera of different individuals. This individual-to-individual variation in viral escape mutations is not present among ferrets that have been infected just once with a defined viral strain. Our results show how different single mutations help influenza virus escape the immunity of different members of the human population, a phenomenon that could shape viral evolution and disease susceptibility.
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Affiliation(s)
- Juhye M Lee
- Basic Sciences DivisionFred Hutchinson Cancer Research CenterSeattleUnited States
- Department of Genome SciencesUniversity of WashingtonSeattleUnited States
| | - Rachel Eguia
- Basic Sciences DivisionFred Hutchinson Cancer Research CenterSeattleUnited States
| | - Seth J Zost
- Department of MicrobiologyPerelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Saket Choudhary
- Department of Biological SciencesUniversity of Southern CaliforniaLos AngelesUnited States
| | - Patrick C Wilson
- Department of MedicineSection of Rheumatology, University of ChicagoChicagoUnited States
| | - Trevor Bedford
- Vaccine and Infectious Disease DivisionFred Hutchinson Cancer Research CenterSeattleUnited States
| | - Terry Stevens-Ayers
- Vaccine and Infectious Disease DivisionFred Hutchinson Cancer Research CenterSeattleUnited States
| | - Michael Boeckh
- Vaccine and Infectious Disease DivisionFred Hutchinson Cancer Research CenterSeattleUnited States
| | - Aeron C Hurt
- WHO Collaborating Centre for Reference and Research on Influenza, Peter Doherty Institute for Infection and ImmunityMelbourneAustralia
| | - Seema S Lakdawala
- Department of Microbiology and Molecular GeneticsSchool of Medicine, University of PittsburghPittsburghUnited States
| | - Scott E Hensley
- Department of MicrobiologyPerelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Jesse D Bloom
- Basic Sciences DivisionFred Hutchinson Cancer Research CenterSeattleUnited States
- Department of Genome SciencesUniversity of WashingtonSeattleUnited States
- Howard Hughes Medical InstituteSeattleUnited States
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27
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Affiliation(s)
- Seema S Lakdawala
- Department of Microbiology & Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA.
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA.
| | - Christopher B Brooke
- Department of Microbiology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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28
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Lakdawala SS, Lee N, Brooke CB. Teaching an Old Virus New Tricks: A Review on New Approaches to Study Age-Old Questions in Influenza Biology. J Mol Biol 2019; 431:4247-4258. [PMID: 31051174 DOI: 10.1016/j.jmb.2019.04.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 04/12/2019] [Accepted: 04/23/2019] [Indexed: 01/31/2023]
Abstract
Influenza viruses have been studied for over 80 years, yet much about the basic viral lifecycle remain unknown. However, new imaging, biochemical, and sequencing techniques have revealed significant insight into many age-old questions of influenza virus biology. In this review, we will cover the role of imaging techniques to describe unique aspects of influenza virus assembly, biochemical techniques to study viral genomic organization, and next-generation sequencing to explore influenza genomic evolution. Our goal is to provide a brief overview of how emerging techniques are being used to answer basic questions about influenza viruses. This is not a comprehensive list of emerging techniques, rather ones that we feel will continue to make significant contributions to field of influenza biology.
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Affiliation(s)
- Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, School of Medicine Pittsburgh, PA 15219, USA.
| | - Nara Lee
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, School of Medicine Pittsburgh, PA 15219, USA.
| | - Christopher B Brooke
- Department of Microbiology, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA.
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29
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Abstract
To supplement a special edition of the journal Viruses, entitled "What's New with Flu?", influenza virus researchers have worked together to generate simple educational material to communicate their science to school students. Educational materials suitable for a range of ages are included, from coloring exercises for younger students through to explanations of cutting-edge science in straightforward language for older students. This article contains a handout with influenza facts, a coloring page, a glossary and word find and a connect-the-dots exercise explaining the ideas behind recently published scientific papers. Together, these materials are intended to make research on influenza viruses more accessible to students and teachers.
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Affiliation(s)
- Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, PA, 15219 USA.
| | - Naina Nair
- School of Simulation and Visualisation, The Glasgow School of Art, 167 Renfrew Street, Glasgow G3 6RQ, UK.
- MRC-University of Glasgow Centre for Virus Research, 464 Bearsden Road, Glasgow G61 1QH, UK.
| | - Edward Hutchinson
- MRC-University of Glasgow Centre for Virus Research, 464 Bearsden Road, Glasgow G61 1QH, UK.
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30
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Marr LC, Tang JW, Van Mullekom J, Lakdawala SS. Mechanistic insights into the effect of humidity on airborne influenza virus survival, transmission and incidence. J R Soc Interface 2019. [PMID: 30958176 DOI: 10.6084/m9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023] Open
Abstract
Influenza incidence and seasonality, along with virus survival and transmission, appear to depend at least partly on humidity, and recent studies have suggested that absolute humidity (AH) is more important than relative humidity (RH) in modulating observed patterns. In this perspective article, we re-evaluate studies of influenza virus survival in aerosols, transmission in animal models and influenza incidence to show that the combination of temperature and RH is equally valid as AH as a predictor. Collinearity must be considered, as higher levels of AH are only possible at higher temperatures, where it is well established that virus decay is more rapid. In studies of incidence that employ meteorological data, outdoor AH may be serving as a proxy for indoor RH in temperate regions during the wintertime heating season. Finally, we present a mechanistic explanation based on droplet evaporation and its impact on droplet physics and chemistry for why RH is more likely than AH to modulate virus survival and transmission.
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Affiliation(s)
- Linsey C Marr
- 1 Civil and Environmental Engineering, Virginia Tech , Blacksburg, VA 24061 , USA
| | - Julian W Tang
- 2 Clinical Microbiology, University Hospitals Leicester NHS Trust , Leicester , UK
- 3 Infection, Immunity and Inflammation, University of Leicester , Leicester , UK
| | | | - Seema S Lakdawala
- 5 Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine , Pittsburgh, PA 15219 , USA
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31
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Marr LC, Tang JW, Van Mullekom J, Lakdawala SS. Mechanistic insights into the effect of humidity on airborne influenza virus survival, transmission and incidence. J R Soc Interface 2019; 16:20180298. [PMID: 30958176 PMCID: PMC6364647 DOI: 10.1098/rsif.2018.0298] [Citation(s) in RCA: 213] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 12/20/2018] [Indexed: 12/27/2022] Open
Abstract
Influenza incidence and seasonality, along with virus survival and transmission, appear to depend at least partly on humidity, and recent studies have suggested that absolute humidity (AH) is more important than relative humidity (RH) in modulating observed patterns. In this perspective article, we re-evaluate studies of influenza virus survival in aerosols, transmission in animal models and influenza incidence to show that the combination of temperature and RH is equally valid as AH as a predictor. Collinearity must be considered, as higher levels of AH are only possible at higher temperatures, where it is well established that virus decay is more rapid. In studies of incidence that employ meteorological data, outdoor AH may be serving as a proxy for indoor RH in temperate regions during the wintertime heating season. Finally, we present a mechanistic explanation based on droplet evaporation and its impact on droplet physics and chemistry for why RH is more likely than AH to modulate virus survival and transmission.
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Affiliation(s)
- Linsey C. Marr
- Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061, USA
| | - Julian W. Tang
- Clinical Microbiology, University Hospitals Leicester NHS Trust, Leicester, UK
- Infection, Immunity and Inflammation, University of Leicester, Leicester, UK
| | | | - Seema S. Lakdawala
- Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA
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Abstract
Influenza viruses exhibit a complex life cycle that is still poorly understood. It involves independent replication of each of the eight segments that make up its genome and subsequent coordinated assembly as they egress from the host cell. Fast, time-resolved volumetric live cell imaging offers a powerful tool for understanding the various host mechanisms hijacked by the virus. Here, we describe the methods necessary for generating influenza viruses that carry a fluorescently tagged polymerase complex, infection of biologically relevant cells with these viruses, and finally protocols for live cell imaging and analysis.
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Affiliation(s)
- Amar R Bhagwat
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Valerie Le Sage
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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Abstract
Influenza A viruses bear an eight-segmented single-stranded negative-sense RNA genome that is replicated in the nucleus. Newly synthesized viral RNA (vRNA) segments are exported from the nucleus and transported to the plasma membrane for packaging into progeny virions. Influenza viruses exploit many host proteins during these events, and this is the portion of the viral life cycle when genetic reassortment among influenza viruses occurs. Reassortment among influenza A viruses allows viruses to expand their host range, virulence, and pandemic potential. This review covers recent studies on the export of vRNAs from the nucleus and their transport through the cytoplasm, progressive assembly, and packaging into progeny virus particles. Understanding these events and the constraints on genetic reassortment has implications for assessment of the pandemic potential of newly emerged influenza viruses, for vaccine production, for determination of viral fitness, and for identification of novel therapeutic targets.
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Affiliation(s)
- Seema S Lakdawala
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15219
| | - Ervin Fodor
- Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, United Kingdom
| | - Kanta Subbarao
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892;
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Lee N, Le Sage V, Nanni AV, Snyder DJ, Cooper VS, Lakdawala SS. Genome-wide analysis of influenza viral RNA and nucleoprotein association. Nucleic Acids Res 2017; 45:8968-8977. [PMID: 28911100 PMCID: PMC5587783 DOI: 10.1093/nar/gkx584] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 06/28/2017] [Indexed: 12/23/2022] Open
Abstract
Influenza A virus (IAV) genomes are composed of eight single-stranded RNA segments that are coated by viral nucleoprotein (NP) molecules. Classically, the interaction between NP and viral RNA (vRNA) is depicted as a uniform pattern of ‘beads on a string’. Using high-throughput sequencing of RNA isolated by crosslinking immunoprecipitation (HITS-CLIP), we identified the vRNA binding profiles of NP for two H1N1 IAV strains in virions. Contrary to the prevailing model for vRNA packaging, NP does not bind vRNA uniformly in the A/WSN/1933 and A/California/07/2009 strains, but instead each vRNA segment exhibits a unique binding profile, containing sites that are enriched or poor in NP association. Intriguingly, both H1N1 strains have similar yet distinct NP binding profiles despite extensive sequence conservation. Peaks identified by HITS-CLIP were verified as true NP binding sites based on insensitivity to DNA antisense oligonucleotide-mediated RNase H digestion. Moreover, nucleotide content analysis of NP peaks revealed that these sites are relatively G-rich and U-poor compared to the genome-wide nucleotide content, indicating an as-yet unidentified sequence bias for NP association in vivo. Taken together, our genome-wide study of NP–vRNA interaction has implications for the understanding of influenza vRNA architecture and genome packaging.
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Affiliation(s)
- Nara Lee
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Valerie Le Sage
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Adalena V Nanni
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Dan J Snyder
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Vaughn S Cooper
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Seema S Lakdawala
- University of Pittsburgh School of Medicine, Department of Microbiology and Molecular Genetics, 450 Technology Drive, Pittsburgh, PA 15219, USA
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Lakdawala SS, Wu Y, Wawrzusin P, Kabat J, Broadbent AJ, Lamirande EW, Fodor E, Altan-Bonnet N, Shroff H, Subbarao K. Correction: Influenza A Virus Assembly Intermediates Fuse in the Cytoplasm. PLoS Pathog 2016; 12:e1006121. [PMID: 28027316 PMCID: PMC5189951 DOI: 10.1371/journal.ppat.1006121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Lakdawala SS, Shih AR, Jayaraman A, Lamirande EW, Moore I, Paskel M, Sasisekharan R, Subbarao K. Corrigendum to: “Receptor specificity does not affect replication or virulence of the 2009 pandemic H1N1 influenza virus in mice and ferrets” [Virology 446 (1–2) (2013) 349–356]. Virology 2015. [DOI: 10.1016/j.virol.2015.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lakdawala SS, Jayaraman A, Halpin RA, Lamirande EW, Shih AR, Stockwell TB, Lin X, Simenauer A, Hanson CT, Vogel L, Paskel M, Minai M, Moore I, Orandle M, Das SR, Wentworth DE, Sasisekharan R, Subbarao K. The soft palate is an important site of adaptation for transmissible influenza viruses. Nature 2015; 526:122-5. [PMID: 26416728 PMCID: PMC4592815 DOI: 10.1038/nature15379] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 08/05/2015] [Indexed: 01/19/2023]
Affiliation(s)
- Seema S Lakdawala
- Laboratory of infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Akila Jayaraman
- Department of Biological Engineering, Koch Institute for Integrative Cancer Research, Singapore-MIT Alliance for Research and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | | - Elaine W Lamirande
- Laboratory of infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Angela R Shih
- Laboratory of infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | | | - Xudong Lin
- J. Craig Venter Institute, Rockville, Maryland 20850, USA
| | - Ari Simenauer
- J. Craig Venter Institute, Rockville, Maryland 20850, USA
| | - Christopher T Hanson
- Laboratory of infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Leatrice Vogel
- Laboratory of infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Myeisha Paskel
- Laboratory of infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Mahnaz Minai
- Comparative Medicine Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Ian Moore
- Comparative Medicine Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Marlene Orandle
- Comparative Medicine Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Suman R Das
- J. Craig Venter Institute, Rockville, Maryland 20850, USA
| | | | - Ram Sasisekharan
- Department of Biological Engineering, Koch Institute for Integrative Cancer Research, Singapore-MIT Alliance for Research and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Kanta Subbarao
- Laboratory of infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
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Lakdawala SS, Shih AR, Jayaraman A, Lamirande EW, Moore I, Paskel M, Kenney H, Sasisekharan R, Subbarao K. Receptor specificity does not affect replication or virulence of the 2009 pandemic H1N1 influenza virus in mice and ferrets. Virology 2013; 446:349-56. [PMID: 24074599 DOI: 10.1016/j.virol.2013.08.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 07/14/2013] [Accepted: 08/13/2013] [Indexed: 02/04/2023]
Abstract
Human influenza viruses predominantly bind α2,6 linked sialic acid (SA) while avian viruses bind α2,3 SA-containing complex glycans. Virulence and tissue tropism of influenza viruses have been ascribed to this binding preference. We generated 2009 pandemic H1N1 (pH1N1) viruses with either predominant α2,3 or α2,6 SA binding and evaluated these viruses in mice and ferrets. The α2,3 pH1N1 virus had similar virulence in mice and replicated to similar titers in the respiratory tract of mice and ferrets as the α2,6 and WT pH1N1 viruses. Immunohistochemical analysis determined that all viruses infected similar cell types in ferret lungs. There is increasing evidence that receptor specificity of influenza viruses is more complex than the binary model of α2,6 and α2,3 SA binding and our data suggest that influenza viruses use a wide range of SA moieties to infect host cells.
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Affiliation(s)
- Seema S Lakdawala
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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39
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Affiliation(s)
- Seema S Lakdawala
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
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Carson CT, Orazio NI, Lee DV, Suh J, Bekker-Jensen S, Araujo FD, Lakdawala SS, Lilley CE, Bartek J, Lukas J, Weitzman MD. Mislocalization of the MRN complex prevents ATR signaling during adenovirus infection. EMBO J 2009; 28:652-62. [PMID: 19197236 PMCID: PMC2666027 DOI: 10.1038/emboj.2009.15] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Accepted: 12/23/2008] [Indexed: 01/13/2023] Open
Abstract
The protein kinases ataxia-telangiectasia mutated (ATM) and ATM-Rad3 related (ATR) are activated in response to DNA damage, genotoxic stress and virus infections. Here we show that during infection with wild-type adenovirus, ATR and its cofactors RPA32, ATRIP and TopBP1 accumulate at viral replication centres, but there is minimal ATR activation. We show that the Mre11/Rad50/Nbs1 (MRN) complex is recruited to viral centres only during infection with adenoviruses lacking the early region E4 and ATR signaling is activated. This suggests a novel requirement for the MRN complex in ATR activation during virus infection, which is independent of Mre11 nuclease activity and recruitment of RPA/ATR/ATRIP/TopBP1. Unlike other damage scenarios, we found that ATM and ATR signaling are not dependent on each other during infection. We identify a region of the viral E4orf3 protein responsible for immobilization of the MRN complex and show that this prevents ATR signaling during adenovirus infection. We propose that immobilization of the MRN damage sensor by E4orf3 protein prevents recognition of viral genomes and blocks detrimental aspects of checkpoint signaling during virus infection.
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Affiliation(s)
- Christian T Carson
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
- Graduate Program, Division of Biology, University of California, San Diego, CA, USA
| | - Nicole I Orazio
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
- Graduate Program, Division of Biology, University of California, San Diego, CA, USA
| | - Darwin V Lee
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Junghae Suh
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Simon Bekker-Jensen
- Centre for Genotoxic Stress Research, Institute of Cancer Biology, Danish Cancer Society, Copenhagen, Denmark
| | - Felipe D Araujo
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Seema S Lakdawala
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
- Graduate Program, Division of Biology, University of California, San Diego, CA, USA
| | - Caroline E Lilley
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Jiri Bartek
- Centre for Genotoxic Stress Research, Institute of Cancer Biology, Danish Cancer Society, Copenhagen, Denmark
| | - Jiri Lukas
- Centre for Genotoxic Stress Research, Institute of Cancer Biology, Danish Cancer Society, Copenhagen, Denmark
| | - Matthew D Weitzman
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
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