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2019 Fiscal Year Final Research Report

Clarification of tumor immune system in chemical carcinogenic autoimmune model mice

Research Project

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Project/Area Number 17K17964
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Morphological basic dentistry
Pathobiological dentistry/Dental radiology
Research InstitutionKagoshima University

Principal Investigator

Kondo Tomoyuki  鹿児島大学, 医歯学域歯学系, 助教 (10782873)

Project Period (FY) 2017-04-01 – 2020-03-31
Keywords腫瘍免疫 / 自己免疫 / 化学発がん
Outline of Final Research Achievements

We analyzed Azoxymethane-induced colorectal cancer model in autoimmune B6/lpr mice to clarify the basic tumor immune response in autoimmune disease.
As a result, both autoimmune model mice and control mice showed colorectal adenocarcinomas, but only autoimmune model mice showed cancer nests involved in the submucosal layer beyond the muscularis mucosa. Furthermore, the immune cell populations in peripheral blood samples were analyzed by flow cytometry. The proportions of PD-1+ T cells and CTLA4+ B cells in autoimmune model mice were significantly higher compared with that in control mice. These results suggest that tumor immunity was suppressed in autoimmune model mice.

Free Research Field

口腔病理学

Academic Significance and Societal Importance of the Research Achievements

現在腫瘍に対する免疫システムは現在大きく着目され、いわゆる免疫療法が脚光を浴び一部は臨床応用されている。しかしながらある一定の治療効果は認められているものの、根治的な治療法としては課題が多くさらなるブレイクスルーが世界的に求められている。本研究は腫瘍免疫を自己免疫と絡めた独特の視点から解析したもので、本研究で得られた結果は腫瘍免疫に対する新たな知見である。今後さらに本研究内容を発展させれば腫瘍免疫療法のブレイクスルーに繋がる可能性がある。

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Published: 2021-02-19  

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