PolyI:polyC12U adjuvant-combined intranasal vaccine protects mice against highly pathogenic H5N1 influenza virus variants.
The highly pathogenic avian H5N1 influenza virus has the potential to incite a global pandemic. Therefore, there is an urgent need to develop effective vaccines against these viruses. Because it is difficult to predict which strain of influenza will cause a pandemic, it is advantageous to develop vaccines that will confer cross-protective immunity against variants of the influenza virus. Recently, we reported that the Toll-like receptor 3 agonist, polyI:polyC(12)U (Ampligen), has been proven to be safe in a Phase III human trial, and is an effective mucosal adjuvant for intranasal H5N1 influenza vaccination. Intranasal administration of an Ampligen adjuvanted pre-pandemic H5N1 vaccine (NIBRG14), which was derived from the A/Vietnam/1194/2004 strain, resulted in the secretion of vaccine-specific IgA and IgG in nasal mucosa and serum, respectively, and protected mice against homologous A/Vietnam/1194/2004 and heterologous A/Hong Kong/483/97 and A/Indonesia/6/2005 viral challenge.
Department of Pathology, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama-shi, Tokyo, Japan.
Takeshi
T
Ichinohe
Akira
A
Ainai
Masato
M
Tashiro
Tetsutaro
T
Sata
Hideki
H
Hasegawa
D000276:Adjuvants, Immunologic; D000281:Administration, Intranasal; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D000917:Antibody Formation; D056738:Cross Protection; D018928:Immunity, Mucosal; D007070:Immunoglobulin A / Q000276:immunology; D007074:Immunoglobulin G / Q000097:blood; D053124:Influenza A Virus, H5N1 Subtype / Q000276:immunology*; D007252:Influenza Vaccines / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D009976:Orthomyxoviridae Infections / Q000276:immunology / Q000517:prevention & control*; D011070:Poly I-C / Q000276:immunology*; D011072:Poly U / Q000276:immunology*
D000276:Adjuvants, Immunologic; D000914:Antibodies, Viral; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007252:Influenza Vaccines; D011072:Poly U; C047490:poly(I).poly(c12,U); D011070:Poly I-C