title: Long-term immunogenicity of an inactivated split-virion 2009 pandemic influenza A H1N1 virus vaccine with or without aluminum adjuvant in mice.
abstract: In 2009, a global epidemic of influenza A(H1N1) virus caused the death of tens of thousands of people. Vaccination is the most effective means of controlling an epidemic of influenza and reducing the mortality rate. In this study, the long-term immunogenicity of influenza A/California/7/2009 (H1N1) split vaccine was observed as long as 15 months (450 days) after immunization in a mouse model. Female BALB/c mice were immunized intraperitoneally with different doses of aluminum-adjuvanted vaccine. The mice were challenged with a lethal dose (10× 50% lethal dose [LD(50)]) of homologous virus 450 days after immunization. The results showed that the supplemented aluminum adjuvant not only effectively enhanced the protective effect of the vaccine but also reduced the immunizing dose of the vaccine. In addition, the aluminum adjuvant enhanced the IgG antibody level of mice immunized with the H1N1 split vaccine. The IgG level was correlated to the survival rate of the mice. Aluminum-adjuvanted inactivated split-virion 2009 pandemic influenza A H1N1 vaccine has good immunogenicity and provided long-term protection against lethal influenza virus challenge in mice.
authors.affiliation: Shanghai Institute of Biological Products, Shanghai, China School of Life Sciences, Fudan University, Shanghai, China.
authors.forename: Wenting
authors.initials: W
authors.lastname: Xu
authors.affiliation: Shanghai Institute of Biological Products, Shanghai, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Zheng
authors.affiliation: Shanghai Institute of Biological Products, Shanghai, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Zhou
authors.affiliation: Shanghai Institute of Biological Products, Shanghai, China College of Life Sciences, Hunan Normal University, Changsha, Hunan, China chenze2005@hotmail.com.
authors.forename: Ze
authors.initials: Z
authors.lastname: Chen
mesh_terms: D000276:Adjuvants, Immunologic; D000535:Aluminum / Q000276:immunology; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D053118:Influenza A Virus, H1N1 Subtype / Q000276:immunology*; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000276:immunology*; D007274:Injections, Intraperitoneal; D051379:Mice; D008807:Mice, Inbred BALB C; D013997:Time Factors; D015164:Vaccines, Inactivated; D019562:Viral Load
chemical_list: D000276:Adjuvants, Immunologic; D000914:Antibodies, Viral; D007074:Immunoglobulin G; D007252:Influenza Vaccines; D015164:Vaccines, Inactivated; D000535:Aluminum