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Adjuvant activity mediated by iNKT cells

Shinichiro Fujii1, Shinichiro Motohashi, Kanako Shimizu

  • 1Research Unit for Cellular Immunotherapy, RIKEN Research Center for Allergy and Immunology, 1-7-22, Suehiro-cho, Tsurumi-ku, Yokohama, Japan.

Seminars in Immunology
|November 27, 2009
PubMed

Invariant natural killer T (iNKT) cells have adjuvant activity due to their ability to produce large amounts of IFN-gamma, which activates other cells in innate and acquired systems, and orchestrates protective immunity. Based on these adjuvant mechanisms, we developed iNKT cell-targeted adjuvant therapy and carried out a phase I/IIa trial on advanced lung cancer patients. The patient group with increased numbers of IFN-gamma-producing cells showed prolonged survival with a median survival time of 31.9 months. Sixty percent of the patients in this group survived for more than 2 years with only a primary treatment and without tumor progression and metastasis.

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