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Belser JA, Kieran TJ, Mitchell ZA, Sun X, Mayfield K, Tumpey TM, Spengler JR, Maines TR. Key considerations to improve the normalization, interpretation and reproducibility of morbidity data in mammalian models of viral disease. Dis Model Mech 2024; 17:dmm050511. [PMID: 38440823 PMCID: PMC10941659 DOI: 10.1242/dmm.050511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 02/05/2024] [Indexed: 03/06/2024] Open
Abstract
Viral pathogenesis and therapeutic screening studies that utilize small mammalian models rely on the accurate quantification and interpretation of morbidity measurements, such as weight and body temperature, which can vary depending on the model, agent and/or experimental design used. As a result, morbidity-related data are frequently normalized within and across screening studies to aid with their interpretation. However, such data normalization can be performed in a variety of ways, leading to differences in conclusions drawn and making comparisons between studies challenging. Here, we discuss variability in the normalization, interpretation, and presentation of morbidity measurements for four model species frequently used to study a diverse range of human viral pathogens - mice, hamsters, guinea pigs and ferrets. We also analyze findings aggregated from influenza A virus-infected ferrets to contextualize this discussion. We focus on serially collected weight and temperature data to illustrate how the conclusions drawn from this information can vary depending on how raw data are collected, normalized and measured. Taken together, this work supports continued efforts in understanding how normalization affects the interpretation of morbidity data and highlights best practices to improve the interpretation and utility of these findings for extrapolation to public health contexts.
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Affiliation(s)
- Jessica A. Belser
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Troy J. Kieran
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Zoë A. Mitchell
- Franklin College of Arts and Sciences, University of Georgia, Athens, GA 30602, USA
- Division of Scientific Resources, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Xiangjie Sun
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Kristin Mayfield
- Division of Scientific Resources, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Terrence M. Tumpey
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Jessica R. Spengler
- Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Taronna R. Maines
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
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Paterson J, Ryan KA, Morley D, Jones NJ, Yeates P, Hall Y, Whittaker CJ, Salguero FJ, Marriott AC. Infection with Seasonal H1N1 Influenza Results in Comparable Disease Kinetics and Host Immune Responses in Ferrets and Golden Syrian Hamsters. Pathogens 2023; 12:pathogens12050668. [PMID: 37242338 DOI: 10.3390/pathogens12050668] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/21/2023] [Accepted: 04/26/2023] [Indexed: 05/28/2023] Open
Abstract
Animal models of influenza are important in preclinical research for the study of influenza infection and the assessment of vaccines, drugs and therapeutics. Here, we show that Golden Syrian hamsters (Mesocricetus auratus) inoculated via the intranasal route with high dose of influenza H1N1 display comparable disease kinetics and immune responses to the 'gold standard' ferret (Mustela furo) model. We demonstrate that both the hamster and ferret models have measurable disease endpoints of weight loss, temperature change, viral shedding from the upper respiratory tract and increased lung pathology. We also characterised both the humoral and cellular immune responses to infection in both models. The comparability of these data supports the Golden Syrian hamster model being useful in preclinical evaluation studies to explore the efficacy of countermeasures against influenza.
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Affiliation(s)
- Jemma Paterson
- UK Health Security Agency, Porton Down, Salisbury SP4 0JG, UK
| | - Kathryn A Ryan
- UK Health Security Agency, Porton Down, Salisbury SP4 0JG, UK
| | - Daniel Morley
- UK Health Security Agency, Porton Down, Salisbury SP4 0JG, UK
| | - Nicola J Jones
- UK Health Security Agency, Porton Down, Salisbury SP4 0JG, UK
| | - Paul Yeates
- UK Health Security Agency, Porton Down, Salisbury SP4 0JG, UK
| | - Yper Hall
- UK Health Security Agency, Porton Down, Salisbury SP4 0JG, UK
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Chiba S, Hatta M, Pattinson D, Yasuhara A, Neumann G, Kawaoka Y. Ferret model to mimic the sequential exposure of humans to historical H3N2 influenza viruses. Vaccine 2023; 41:590-597. [PMID: 36517323 DOI: 10.1016/j.vaccine.2022.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/04/2022] [Accepted: 12/05/2022] [Indexed: 12/15/2022]
Abstract
Mutations accumulate in influenza A virus proteins, especially in the main epitopes on the virus surface glycoprotein hemagglutinin (HA). For influenza A(H3N2) viruses, in particular, the antigenicity of their HA has altered since their emergence in 1968, requiring changes of vaccine strains every few years. Most adults have been exposed to several antigenically divergent H3N2 viruses through infection and/or vaccination, and those exposures affect the immune responses of those individuals. However, animal models reflecting this 'immune history' in humans are lacking and naïve animals are generally used for vaccination and virus challenge studies. Here, we describe a ferret model to mimic the serial exposure of humans to antigenically different historical H3HA proteins. In this model, ferrets were sequentially immunized with adjuvanted recombinant H3HA proteins from two or three different H3HA antigenic clusters in chronological order, and serum neutralizing antibody titers were examined against the homologous virus and viruses from different antigenic clusters. For ferrets immunized with a single HA antigen, serum neutralizing antibody titers were elevated specifically against the homologous virus. However, after immunization with the second or third antigenically distinct HA antigen in chronological order, the ferrets showed an increase in more broadly cross-reactive neutralizing titers against the antigenically distinct viruses and against the homologous virus. Sequentially immunized animals challenged with an antigenically advanced H3N2 virus showed attenuated virus growth and less body temperature increase compared with naïve animals. These results suggest that sequential exposure to antigenically different HAs elicits broader neutralizing activity in sera and enhances immune responses against more antigenically distinct viruses Our findings may partly explain why adults who have been exposed to antigenically divergent HAs are less likely to be infected with influenza virus and have severe symptoms than children.
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Affiliation(s)
- Shiho Chiba
- Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, WI 53711, USA
| | - Masato Hatta
- Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, WI 53711, USA
| | - David Pattinson
- Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, WI 53711, USA
| | - Atsuhiro Yasuhara
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Gabriele Neumann
- Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, WI 53711, USA
| | - Yoshihiro Kawaoka
- Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, WI 53711, USA; Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan; The Research Center for Global Viral Diseases, National Center for Global Health and Medicine Research Institute, Tokyo 162-8655, Japan.
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James J, Meyer SM, Hong HA, Dang C, Linh HTY, Ferreira W, Katsande PM, Vo L, Hynes D, Love W, Banyard AC, Cutting SM. Intranasal Treatment of Ferrets with Inert Bacterial Spores Reduces Disease Caused by a Challenging H7N9 Avian Influenza Virus. Vaccines (Basel) 2022; 10:vaccines10091559. [PMID: 36146637 PMCID: PMC9502451 DOI: 10.3390/vaccines10091559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 09/09/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Influenza is a respiratory infection that continues to present a major threat to human health, with ~500,000 deaths/year. Continued circulation of epidemic subtypes in humans and animals potentially increases the risk of future pandemics. Vaccination has failed to halt the evolution of this virus and next-generation prophylactic approaches are under development. Naked, “heat inactivated”, or inert bacterial spores have been shown to protect against influenza in murine models. Methods: Ferrets were administered intranasal doses of inert bacterial spores (DSM 32444K) every 7 days for 4 weeks. Seven days after the last dose, the animals were challenged with avian H7N9 influenza A virus. Clinical signs of infection and viral shedding were monitored. Results: Clinical symptoms of infection were significantly reduced in animals dosed with DSM 32444K. The temporal kinetics of viral shedding was reduced but not prevented. Conclusion: Taken together, nasal dosing using heat-stable spores could provide a useful approach for influenza prophylaxis in both humans and animals.
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Affiliation(s)
- Joe James
- Animal and Plant Health Agency (APHA), Woodham Lane, Weybridge KT15 3NB, Surrey, UK
| | - Stephanie M. Meyer
- Animal and Plant Health Agency (APHA), Woodham Lane, Weybridge KT15 3NB, Surrey, UK
| | - Huynh A. Hong
- SporeGen Ltd., London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
| | - Chau Dang
- SporeGen Ltd., London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
| | - Ho T. Y. Linh
- HURO Biotech JSC, Lot A1-8, VL3 Road, Vinh Loc 2 Industrial Park, Long Hiep Commune, Ben Luc District, Long An, Vietnam
| | - William Ferreira
- SporeGen Ltd., London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
| | - Paidamoyo M. Katsande
- Department of Biological Sciences, Royal Holloway University of London, Egham TW20 0EX, Surrey, UK
| | - Linh Vo
- SporeGen Ltd., London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
| | - Daniel Hynes
- Destiny Pharma Plc., Sussex Innovation Centre, Science Park Square, Falmer, Brighton BN1 9SB, UK
| | - William Love
- Destiny Pharma Plc., Sussex Innovation Centre, Science Park Square, Falmer, Brighton BN1 9SB, UK
| | - Ashley C. Banyard
- Animal and Plant Health Agency (APHA), Woodham Lane, Weybridge KT15 3NB, Surrey, UK
| | - Simon M. Cutting
- SporeGen Ltd., London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
- Department of Biological Sciences, Royal Holloway University of London, Egham TW20 0EX, Surrey, UK
- Correspondence: ; Tel.: +44-(0)7900-408043
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