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2021 Fiscal Year Final Research Report

Elucidation of the function of CD163-positive macrophages in the tumor microenvironment.

Research Project

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Project/Area Number 19K09555
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56020:Orthopedics-related
Research InstitutionKumamoto University

Principal Investigator

Shiraishi Daisuke  熊本大学, 大学院生命科学研究部(医), 特定研究員 (70769512)

Co-Investigator(Kenkyū-buntansha) 菰原 義弘  熊本大学, 大学院生命科学研究部(医), 教授 (40449921)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords腫瘍関連マクロファージ / CD163 / 骨肉腫 / 肉腫 / スルフィド化合物
Outline of Final Research Achievements

To develop a new therapeutic strategy for osteosarcoma by regulating the activation of macrophages contributing to tumor progression in the tumor microenvironment, we evaluated the function of CD163, a macrophage-specific molecule, on tumor progression and the antitumor activity of CD163-targeting compounds. We found that Onionin A, a cyclic sulfur compound, and its derivatives inhibiting CD163 suppressed tumor progression by regulating macrophage activation. These compounds also inhibited tumor progression in tumor-bearing mice by stimulating tumor immunity through regulating the activation of tumor-infiltrating macrophages. Therefore, it is suggested that CD163-targeted regulation of macrophage activation may be a candidate for a novel therapeutic strategy against osteosarcoma.

Free Research Field

整形外科学

Academic Significance and Societal Importance of the Research Achievements

本研究は骨肉腫における腫瘍浸潤マクロファージでのCD163の腫瘍免疫における役割を明らかにすることでCD163標的化合物を癌治療に応用しようとする研究である。本研究では数種の環状硫黄化合物がCD163を抑制することでマクロファージの活性化を制御し、骨肉腫に対して有効性を示すことを明らかにした。本研究成果は骨肉腫治療において腫瘍浸潤マクロファージの活性化制御が治療ターゲットとなりうる可能性を明らかにしたことで新たな治療戦略の一助となるものと考えられる。

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Published: 2023-01-30  

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