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2023 Fiscal Year Final Research Report

Control of KRAS signals in cancer-immune microenvironment

Research Project

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Project/Area Number 21K07161
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionFukuoka University

Principal Investigator

Tsunoda Toshiyuki  福岡大学, 医学部, 准教授 (70444817)

Co-Investigator(Kenkyū-buntansha) 白澤 専二  福岡大学, 医学部, 教授 (10253535)
青木 光希子  福岡大学, 医学部, 講師 (80469379)
Project Period (FY) 2021-04-01 – 2024-03-31
KeywordsPMC / KRAS / マクロファージ / KDELR / 薬剤抵抗性 / ゴルジ体
Outline of Final Research Achievements

The compound Pyra-Metho-Carnil (PMC) potently inhibits tumor growth, especially in nude mice lacking T and B cells. In our analysis, PMC inhibited the differentiation and maturation of THP-1 cells into macrophages and inhibited tumor mass growth in co-culture, suggesting that the mechanism of action of PMC is by suppressing tumor-associated macrophages via NFκB signaling. Furthermore, intraperitoneal administration of PMC also inhibited macrophage maturation in mouse experiments. A novel compound that inhibits the KDEL receptor, a target of PMC, has also been identified, and a drug delivery system targeting KDELR has been developed (patent pending).

Translated with DeepL.com (free version)

Free Research Field

癌

Academic Significance and Societal Importance of the Research Achievements

これまでに癌に対する多くの分子標的薬が開発されてきたものの、多くの場合薬剤抵抗性を生じる。変異KRASは多くの癌において変異が認められ、これまで直接の分子標的薬はなかったが、近年開発が進んできた。しかし同様に、薬剤抵抗性が問題となっている。その原因は変異KRASが制御するシグナルの上流にバイパスが形成されることが考えられているが、我々はその下流の分子であるKDELRを標的とすることにより、抵抗性の出現の低い抗腫瘍化合物が可能であり、これまでに治療法のない難治性癌の加療が可能になる。

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Published: 2025-01-30  

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