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Cao W, Mishina M, Amoah S, Mboko WP, Bohannon C, McCoy J, Mittal SK, Gangappa S, Sambhara S. Nasal delivery of H5N1 avian influenza vaccine formulated with GenJet™ or in vivo-jetPEI ® induces enhanced serological, cellular and protective immune responses. Drug Deliv 2018. [PMID: 29542358 PMCID: PMC6058713 DOI: 10.1080/10717544.2018.1450909] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Avian influenza virus infection is a serious public health threat and preventive vaccination is the most cost-effective public health intervention strategy. Unfortunately, currently available unadjuvanted avian influenza vaccines are poorly immunogenic and alternative vaccine formulations and delivery strategies are in urgent need to reduce the high risk of avian influenza pandemics. Cationic polymers have been widely used as vectors for gene delivery in vitro and in vivo. In this study, we formulated H5N1 influenza vaccines with GenJet™ or in vivo-jetPEI®, and showed that these formulations significantly enhanced the immunogenicity of H5N1 vaccines and conferred protective immunity in a mouse model. Detailed analyses of adaptive immune responses revealed that both formulations induced mixed TH1/TH2 antigen-specific CD4 T-cell responses, antigen-specific cytotoxic CD8 T-cell and memory B-cell responses. Our findings suggest that cationic polymers merit future development as potential adjuvants for mucosal delivery of poorly immunogenic vaccines.
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Affiliation(s)
- Weiping Cao
- a Immunology and Pathogenesis Branch , National Center for Immunization and Respiratory Diseases , Atlanta , GA , USA.,b Influenza Division , Centers for Disease Control and Prevention , Atlanta , GA , USA
| | - Margarita Mishina
- a Immunology and Pathogenesis Branch , National Center for Immunization and Respiratory Diseases , Atlanta , GA , USA.,b Influenza Division , Centers for Disease Control and Prevention , Atlanta , GA , USA.,c Battelle Memorial Institute , Atlanta , GA , USA
| | - Samuel Amoah
- a Immunology and Pathogenesis Branch , National Center for Immunization and Respiratory Diseases , Atlanta , GA , USA.,b Influenza Division , Centers for Disease Control and Prevention , Atlanta , GA , USA.,c Battelle Memorial Institute , Atlanta , GA , USA
| | - Wadzanai P Mboko
- d Department of Comparative Pathobiology , Purdue University , West Lafayette , IN , USA
| | - Caitlin Bohannon
- a Immunology and Pathogenesis Branch , National Center for Immunization and Respiratory Diseases , Atlanta , GA , USA.,b Influenza Division , Centers for Disease Control and Prevention , Atlanta , GA , USA.,e Oak Ridge Institute for Science and Education (ORISE), CDC Fellowship Program , Oak Ridge , TN , USA
| | - James McCoy
- f Department of Pathology and Laboratory Medicine , Emory University , Atlanta , GA , USA
| | - Suresh K Mittal
- d Department of Comparative Pathobiology , Purdue University , West Lafayette , IN , USA
| | - Shivaprakash Gangappa
- a Immunology and Pathogenesis Branch , National Center for Immunization and Respiratory Diseases , Atlanta , GA , USA.,b Influenza Division , Centers for Disease Control and Prevention , Atlanta , GA , USA
| | - Suryaprakash Sambhara
- a Immunology and Pathogenesis Branch , National Center for Immunization and Respiratory Diseases , Atlanta , GA , USA.,b Influenza Division , Centers for Disease Control and Prevention , Atlanta , GA , USA
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Widdowson MA, Bresee JS, Jernigan DB. The Global Threat of Animal Influenza Viruses of Zoonotic Concern: Then and Now. J Infect Dis 2017; 216:S493-S498. [PMID: 28934463 PMCID: PMC7313897 DOI: 10.1093/infdis/jix331] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Animal influenza viruses can reassort or mutate to infect and spread sustainably among people and cause a devastating worldwide pandemic. Since the first evidence of human infection with an animal influenza virus, in 1958, 16 different novel, zoonotic influenza A virus subtype groups in 29 countries, Taiwan, and Hong Kong have caused human infections, with differing severity and frequency. The frequency of novel influenza virus detection is increasing, and human infections with influenza A(H5N1) and A(H7N9) viruses are now annual seasonal occurrences in Asia. The study of the epidemiology and virology of animal influenza viruses is key to understanding pandemic risk and informing preparedness. This supplement brings together select recent articles that look at the risk of emergence and transmission of and approaches to prevent novel influenza virus infections.
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Affiliation(s)
- Marc-Alain Widdowson
- Division of Global Health Protection, Center for Global Health, Centers for Disease Control and Prevention (CDC), Nairobi, Kenya.,Division of Global Health Protection, Center for Global Health, CDC, Atlanta, Georgia
| | - Joseph S Bresee
- Influenza Division, National Center for Immunization and Respiratory Diseases
| | - Daniel B Jernigan
- Influenza Division, National Center for Immunization and Respiratory Diseases
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