Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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Outline of Final Research Achievements |
In this study, we examined the association between immunosuppressive cells and clinical course, the suppressive mechanism in the antitumor immunity, the drug that interferes with immunosuppressive cells. The head and neck cancer patients who had higher frequency of myeloid-derived suppressor cells and effector regulatory T cells (Treg) in the peripheral blood showed poor prognosis. The frequency of these cells showed significant association with clinical course and were suggested to be useful markers for prognosis prediction, therapeutic efficacy or tumor recurrence. Because upper jugular lymph node which was regional lymph node of nasal mucosa included lower frequency of Treg, suggesting that nasal mucosa was the suitable site for the induction of antitumor immunity. The suppressive activity of eTreg on NKT cells was reversed by the addition of an antitumor medicine, suggesting that the control of immunosuppressive cells enhances the efficacy of cancer immunotherapy.
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