Immunization with live virus vaccine protects highly susceptible DBA/2J mice from lethal influenza A H1N1 infection
© Dengler et al.; licensee BioMed Central Ltd. 2012
Received: 29 February 2012
Accepted: 13 September 2012
Published: 19 September 2012
The mouse represents an important model system to study the host response to influenza A infections and to evaluate new prevention or treatment strategies. We and others reported that the susceptibility to influenza A virus infections strongly varies among different inbred mouse strains. In particular, DBA/2J mice are highly susceptible to several influenza A subtypes, including human isolates and exhibit severe symptoms after infection with clinical isolates.
Upon intra-muscular immunization with live H1N1 influenza A virus (mouse-adapted PR8M, and 2009 pandemic human HA04), DBA/2J mice mounted virus-specific IgG responses and were protected against a subsequent lethal challenge. The immune response and rescue from death after immunization in DBA/2J was similar to those observed for C57BL/6J mice.
DBA/2J mice represent a suitable mouse model to evaluate virulence and pathogenicity as well as immunization regimes against existing and newly emerging human influenza strains without the need for prior adaptation of the virus to the mouse.
KeywordsInfluenza A virus Mouse DBA/2J Immunization
Influenza A virus infections are a serious health problem, not only during yearly epidemics but also for newly emerging pandemics [1–4]. The mouse has been shown to represent a valuable model system to evaluate the virulence and pathogenicity of presently circulating subtypes as well as newly emerging H5N1 and 2009 pandemic H1N1 subtypes (e.g.[5–14]). Bird viruses are able to infect the lungs of mice without prior adaptation but human isolates differ largely in their virulence in mice [15, 16]. Studies in mice were initially performed in two inbred mouse strains, C57BL/6J and BALB/c. We and others demonstrated that the susceptibility to influenza virus infection largely varies among different inbred mouse strains [12, 15, 17–22]. In particular, DBA/2J mice are highly susceptible to infections with mouse-adapted viruses. But more importantly, they support viral replication and develop symptoms upon infection with several human and bird influenza isolates that were not adapted to the mouse species [15, 16, 23]. A total of 18 low-pathogenic non-mouse-adapted influenza isolates, including five human isolates, were tested in DBA/2J mice and more than 50% were pathogenic for DBA/2J whereas only two were pathogenic for C57BL/6J mice . H3 and H4 subtypes were only low pathogenic whereas H5, H6, H7, H9, H10 subtypes were highly pathogenic in DBA/2J mice . Infection of DBA/2J mice with different H1N1 avian isolates revealed that many were very virulent in DBA/2J but much less than in BALB/c mice, and that H2, H3, H4, H6, H10 and H12 subtypes were less pathogenic than H1N1 subtypes .
Thus, DBA/2J mice represent an ideal system to evaluate virulence and pathogenicity but also preventive and therapeutic interventions against existing and newly emerging human influenza strains. Here, we demonstrate that DBA/2J mice immunized intra-muscularly (i.m.) with live influenza H1N1 viruses developed an influenza-specific IgG response and were subsequently protected against lethal infections.
A further increase in the influenza-specific antibody response was observed in immunized and infected DBA/2J and C57BL/6J compared to the titers measured after the booster immunization (Figure 1). The antibody titers in the immunized and infected C57BL/6J mice were comparable to non-immunized C57BL/6J mice that survived the infection (Figure 1).
Here, we demonstrated the proof-of principle for protective i.m. vaccination in DBA/2J mice using live influenza viruses which is very easy to perform because it does not require addition of adjuvants. These results, together with results from other groups [26, 27] demonstrate that DBA/2J represents a very sensitive yet fully immuno-competent model system which is well suited to investigate adaptive host immune responses to influenza A virus from bird and human origin without the need for prior species-adaptation.
However, it should be noted that mouse knock-out lines are generally created on a C57BL/6N background  and, therefore, the function of a gene in a DBA/2J knock-out mutant line can only be tested after generating a congenic line by backcrossing.
Three other studies investigated the host response in DBA/2J mice after immunization and challenge with influenza A virus. Boon et al. showed that sera from humans containing cross-reactive antibodies against pandemic H1N1 virus protected DBA/2J mice from an infection with pandemic H1N1 . Sambhara et al. immunized DBA/2J mice by subcutaneous injections with immunostimmulatory complexes containing influenza virus antigens and demonstrated that young and aged mice are better protected than control groups which were immunized with a split vaccine that is used in humans . Solórzano et al., infected the lungs of DBA/2J mice with live-attenuated influenza virus and demonstrated that they are protected from lethal infection with pandemic human H1N1 virus .
In conclusion, our studies demonstrate that DBA/2J mice are capable of mounting a protective immune response against mouse-adapted as well as human isolates of H1N1 influenza virus. Together with previous studies, these results endorse the potential of DBA/2J mice as a highly valuable animal model system to evaluate vaccine strains and vaccination protocols against human influenza A virus strains without the need for species-adaptation. They extend previous studies by demonstrating that also i.m. injections of live virus are protective and thereby provide a simple method to evaluate cross-reactivity of vaccine strains.
All experiments in mice were approved by an external committee according to the national guidelines of the animal welfare law in Germany (‘Tierschutzgesetz in der Fassung der Bekanntmachung vom 18. Mai 2006 (BGBl. I S. 1206, 1313), das zuletzt durch Artikel 20 des Gesetzes vom 9. Dezember 2010 (BGBl. I S. 1934) geändert worden ist.’). The protocol used in these experiments has been reviewed by an ethics committee and approved by the ‘Niedersächsiches Landesamt für Verbraucherschutz und Lebensmittelsicherheit, Oldenburg, Germany’ (Permit Number: 33.9.42502-04-051/09).
This work was supported by intra-mural grants from the Helmholtz-Association (Program Infection and Immunity) and a research grant FluResearchNet (No. 01KI07137) from the German Ministry of Education and Research to KS. MMB has obtained an Alexander-von-Humboldt fellowship. Mice for these experiments were maintained by the animal caretakers at the Central Animal Facilities at the HZI. We would like to thank Christin Fricke for excellent technical assistance. Original stocks of viruses were obtained from Stefan Ludwig, University of Münster (PR8M) and Thorsten Wolff, Robert-Koch-Institute, Berlin (HA04).
- Fauci AS: Seasonal and pandemic influenza preparedness: science and countermeasures. J Infect Dis 2006,194(Suppl 2):S73-S76.PubMedView Article
- Klenk HD, Garten W, Matrosovich M: Molecular mechanisms of interspecies transmission and pathogenicity of influenza viruses: Lessons from the 2009 pandemic. Bioessays 2011, 33:180–188.PubMedView Article
- Kilbourne ED: Influenza pandemics of the 20th century. Emerg Infect Dis 2006, 12:9–14.PubMedView Article
- Russell CJ, Webster RG: The genesis of a pandemic influenza virus. Cell 2005, 123:368–371.PubMedView Article
- Matsuoka Y, Lamirande EW, Subbarao K: The mouse model for influenza. Curr Protoc Microbiol 2009, Chapter 15:Unit 15G 13.
- Katz JM, Lu X, Tumpey TM, Smith CB, Shaw MW, Subbarao K: Molecular correlates of influenza A H5N1 virus pathogenesis in mice. J Virol 2000, 74:10807–10810.PubMedView Article
- Hatta M, Hatta Y, Kim JH, Watanabe S, Shinya K, Nguyen T, Lien PS, Le QM, Kawaoka Y: Growth of H5N1 influenza A viruses in the upper respiratory tracts of mice. PLoS Pathog 2007, 3:1374–1379.PubMedView Article
- Lu X, Tumpey TM, Morken T, Zaki SR, Cox NJ, Katz JM: A mouse model for the evaluation of pathogenesis and immunity to influenza A (H5N1) viruses isolated from humans. J Virol 1999, 73:5903–5911.PubMed
- Maines TR, Lu XH, Erb SM, Edwards L, Guarner J, Greer PW, Nguyen DC, Szretter KJ, Chen LM, Thawatsupha P, et al.: Avian influenza (H5N1) viruses isolated from humans in Asia in 2004 exhibit increased virulence in mammals. J Virol 2005, 79:11788–11800.PubMedView Article
- Kash JC, Tumpey TM, Proll SC, Carter V, Perwitasari O, Thomas MJ, Basler CF, Palese P, Taubenberger JK, Garcia-Sastre A, et al.: Genomic Analysis of Increased Host Immune and Cell Death Responses Induced by 1918 Influenza Virus. Nature 2006, 443:578–581.PubMed
- Tumpey TM, Garcia-Sastre A, Taubenberger JK, Palese P, Swayne DE, Pantin-Jackwood MJ, Schultz-Cherry S, Solorzano A, Van Rooijen N, Katz JM, Basler CF: Pathogenicity of Influenza Viruses With Genes From the 1918 Pandemic Virus: Functional Roles of Alveolar Macrophages and Neutrophils in Limiting Virus Replication and Mortality in Mice. J Virol 2005, 79:14933–14944.PubMedView Article
- Trammell RA, Toth LA: Genetic susceptibility and resistance to influenza infection and disease in humans and mice. Expert Rev Mol Diagn 2008, 8:515–529.PubMedView Article
- Perrone LA, Plowden JK, Garcia-Sastre A, Katz JM, Tumpey TM: H5N1 and 1918 pandemic influenza virus infection results in early and excessive infiltration of macrophages and neutrophils in the lungs of mice. PLoS Pathog 2008, 4:e1000115.PubMedView Article
- Belser JA, Szretter KJ, Katz JM, Tumpey TM: Use of animal models to understand the pandemic potential of highly pathogenic avian influenza viruses. Adv Virus Res 2009, 73:55–97.PubMedView Article
- Boon AC, Debeauchamp J, Krauss S, Rubrum A, Webb AD, Webster RG, McElhaney J, Webby RJ: Cross-reactive neutralizing antibodies directed against pandemic H1N1 2009 virus are protective in a highly sensitive DBA/2 influenza mouse model. J Virol 2010,84(15):7662–7667.PubMedView Article
- Kocer ZA, Krauss S, Stallknecht DE, Rehg JE, Webster RG: The Potential of Avian H1N1 Influenza A Viruses to Replicate and Cause Disease in Mammalian Models. PLoS One 2012, 7:e41609.PubMedView Article
- Srivastava B, Blazejewska P, Hessmann M, Bruder D, Geffers R, Mauel S, Gruber AD, Schughart K: Host genetic background strongly influences the response to influenza a virus infections. PLoS One 2009, 4:e4857.PubMedView Article
- Ding M, Lu L, Toth LA: Gene expression in lung and basal forebrain during influenza infection in mice. Genes Brain Behav 2008, 7:173–183.PubMedView Article
- Boon AC, de Beauchamp J, Hollmann A, Luke J, Kotb M, Rowe S, Finkelstein D, Neale G, Lu L, Williams RW, Webby RJ: Host genetic variation affects resistance to infection with a highly pathogenic H5N1 influenza A virus in mice. J Virol 2009, 83:10417–10426.PubMedView Article
- Otte A, Sauter M, Alleva L, Baumgarte S, Klingel K, Gabriel G: Differential host determinants contribute to the pathogenesis of 2009 pandemic H1N1 and human H5N1 influenza A viruses in experimental mouse models. Am J Pathol 2011, 179:230–239.PubMedView Article
- Boon AC, Finkelstein D, Zheng M, Liao G, Allard J, Klumpp K, Webster R, Peltz G, Webby RJ: H5N1 Influenza Virus Pathogenesis in Genetically Diverse Mice Is Mediated at the Level of Viral Load. MBio 2011, 2: . pii: e00171–00111View Article
- Trammell RA, Liberati TA, Toth LA: Host genetic background and the innate inflammatory response of lung to influenza virus. Microbes Infect 2012,14(1):50–58.PubMedView Article
- Pica N, Iyer A, Ramos I, Bouvier NM, Fernandez-Sesma A, Garcia-Sastre A, Lowen AC, Palese P, Steel J: The DBA.2 mouse is susceptible to disease following infection with a broad, but limited, range of influenza A and B viruses. J Virol 2011,85(23):12825–12829.PubMedView Article
- Wilk E, Schughart K: The mouse as model system to study host-pathogen interactions in influenza A infections. Curr Protoc Mouse Biol 2012, 2:177–205.
- Blazejewska P, Koscinski L, Viegas N, Anhlan D, Ludwig S, Schughart K: Pathogenicity of different PR8 influenza A virus variants in mice is determined by both viral and host factors. Virology 2011, 412:36–45.PubMedView Article
- Solorzano A, Ye J, Perez DR: Alternative live-attenuated influenza vaccines based on modifications in the polymerase genes protect against epidemic and pandemic flu. J Virol 2010, 84:4587–4596.PubMedView Article
- Sambhara S, Woods S, Arpino R, Kurichh A, Tamane A, Bengtsson KL, Morein B, Underdown B, Klein M, Burt D: Influenza (H1N1)-ISCOMs enhance immune responses and protection in aged mice. Mech Ageing Dev 1997, 96:157–169.PubMedView Article
- Brown SD, Moore MW: Towards an encyclopaedia of mammalian gene function: the International Mouse Phenotyping Consortium. Dis Model Mech 2012, 5:289–292.PubMedView Article
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