| Project/Area Number |
26462137
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Respiratory surgery
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| Research Institution | Teikyo University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
高橋 祐介 帝京大学, 医学部, 助教 (00445214)
松谷 哲行 帝京大学, 医学部, 准教授 (60621943)
泉 陽太郎 埼玉医科大学, 医学部, 講師 (90245506)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 肺癌 / 腫瘍免疫 / クライオセラピー / 凍結壊死融解療法 / サイトカイン / 腫瘍浸潤T細胞 / 凍結療法 / 免疫反応 |
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| Outline of Final Research Achievements |
Cryosurgery, consisted of 60 sec freezing with liquid nitrogen and 60 sec sawing cycle, was performed to one tumor of bilateral femoral tumors that originated from Lewis Lung Cancer cell. Histologically, there was a significant correlation between the number of cycles of cryosurgery and the area of nonviable tumor area. 75% of the nonviable tumor area was observed in the 2 cycle group, and the abscopal tumor growth rate was significantly slower than that in the other groups. In immunohistochmistry, both the CD4 and CD8 positive T cells infiltration was significantly increased and Ki - 67 positive tumor cells were significantly decreased in the 2 cycle group . There was a significant increase in IL-1β, IL-2, IL-6, IL-12, and TNF-α in the 2-cycle group as compared with the other groups. Our data suggest that infiltration of both CD4 positive and CD8 positive T cells into the abscopal tumor via the increased proinflammatory cytokines could suppress the tumor growth.
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