Xiao Sun, Koji Hosomi, Atsushi Shimoyama, Ken Yoshii, Azusa Saika, Haruki Yamaura, Takahiro Nagatake, Hiroshi Kiyono, Koichi Fukase, Jun Kunisawa
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Alcaligenes lipid A functions as a superior mucosal adjuvant to monophosphoryl lipid A via the recruitment and activation of CD11b+ dendritic cells in nasal tissue.
We previously demonstrated that Alcaligenes-derived lipid A (ALA), which is produced from an intestinal lymphoid tissue-resident commensal bacterium, is an effective adjuvant for inducing antigen-specific immune responses. To understand the immunologic characteristics of ALA as a vaccine adjuvant, we here compared the adjuvant activity of ALA with that of a licensed adjuvant (monophosphoryl lipid A, MPLA) in mice. Although the adjuvant activity of ALA was only slightly greater than that of MPLA for subcutaneous immunization, ALA induced significantly greater IgA antibody production than did MPLA during nasal immunization. Regarding the underlying mechanism, ALA increased and activated CD11b+ CD103- CD11c+ dendritic cells in the nasal tissue by stimulating chemokine responses. These findings revealed the superiority of ALA as a mucosal adjuvant due to the unique immunologic functions of ALA in nasal tissue.
期刊介绍：
International Immunology is an online only (from Jan 2018) journal that publishes basic research and clinical studies from all areas of immunology and includes research conducted in laboratories throughout the world.
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