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2022 Fiscal Year Final Research Report

Tumor immunosuppression by disruption of the circadian clock in tumor-infiltrated immune cells

Research Project

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Project/Area Number 20K16306
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionKyushu University

Principal Investigator

Tsuruta Akito  九州大学, 薬学研究院, 助教 (40847745)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywords腫瘍免疫 / 時間生物学 / 時間薬剤学
Outline of Final Research Achievements

Clock genes that control biological clocks are also expressed in immune cells and regulate various immune functions. Alteration of biological clock induces dysregulation of immune functions. In this study, we found that the circadian clock machinery was altered in tumor-associated macrophages (TAMs). This alteration causes the administration-time dependent changes of the effect of immune checkpoint inhibitor (ICI).

Free Research Field

時間生物学

Academic Significance and Societal Importance of the Research Achievements

本研究では、がん細胞によってがん組織に浸潤した免疫細胞の概日時計機構が変容することで、免疫機能に変化が生じ、腫瘍浸潤マクロファージに発現するProgrammed death receptor-1(PD-1)の発現リズムに合わせて免疫チェックポイント阻害剤を投与することによって薬効を増強できることを明らかにした。本研究成果は、免疫チェックポイント阻害剤の効果を最大限引き出すための投薬時刻設計につながることや、生体リズム変容ががん発症を助長するメカニズムの解析につながることが期待される。

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Published: 2024-01-30  

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