Mechanism of NKT cell activation by intranasal coadministration of α-galactosylceramide, which can induce cross-protection against influenza viruses

H. Kamijuku, Y. Nagata, X. Jiang, T. Ichinohe, T. Tashiro, K. Mori, M. Taniguchi, K. Hase, H. Ohno, T. Shimaoka, S. Yonehara, T. Odagiri, M. Tashiro, T. Sata, H. Hasegawa, K. I. Seino

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Abstract

In a nasal vaccine against influenza, the activation of natural killer T (NKT) cells by intranasal coadministration of α-galactosylceramide (α-GalCer) can potently enhance protective immune responses. The results of this study show that the NKT cell-activated nasal vaccine can induce an effective cross-protection against different strains of influenza virus, including H5 type. To analyze the mechanism of NKT cell activation by this nasal vaccine, we prepared fluorescence-labeled α-GalCer by which we detect a direct interaction between NKT cells and α-GalCer-stored dendritic cells in nasal mucosa-associated tissues. Accordingly, although very few NKT cells exist at mucosa, the nasal vaccination induced a localized increase in NKT cell population, which is partly dependent on CXCL16/CXCR6. Furthermore, we found that NKT cell activation stimulates mucosal IgA production by a mechanism that is dependent on interleukin (IL)-4 production. These results strengthen the basis of nasal vaccination via NKT cell activation, which can induce immune cross-protection.

Original languageEnglish
Pages (from-to)208-218
Number of pages11
JournalMucosal Immunology
Volume1
Issue number3
DOIs
Publication statusPublished - 2008 May 1
Externally publishedYes

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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    Kamijuku, H., Nagata, Y., Jiang, X., Ichinohe, T., Tashiro, T., Mori, K., Taniguchi, M., Hase, K., Ohno, H., Shimaoka, T., Yonehara, S., Odagiri, T., Tashiro, M., Sata, T., Hasegawa, H., & Seino, K. I. (2008). Mechanism of NKT cell activation by intranasal coadministration of α-galactosylceramide, which can induce cross-protection against influenza viruses. Mucosal Immunology, 1(3), 208-218. https://doi.org/10.1038/mi.2008.2