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2021 Fiscal Year Final Research Report

Analysis of tumor infiltrating macrophage polarity alteration in PHD inhibitor treatment tumor

Research Project

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Project/Area Number 20K18097
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56030:Urology-related
Research InstitutionOsaka City University

Principal Investigator

Yamaguchi Kazuyuki  大阪市立大学, 大学院医学研究科, 医員 (80848317)

Project Period (FY) 2020-04-01 – 2022-03-31
Keywords腫瘍 / 腫瘍免疫
Outline of Final Research Achievements

In this study, we investigated the mechanism which tumor-infiltrating macrophages inhibited tumor growth by administration of a prolyl hydroxylase (PHD) inhibitor to tumor transplant mouse model. Administration of PHD inhibitor was superior to hypoxia-inducible factor (HIF), especially HIF-1α, in tumor infiltrating macrophages. Subsequently, administration of PHD inhibitor on tumor bearing mice was induced inflammatory associated gene expression and macrophage polarization gene expression in tumor infiltrating macrophages. It was implied that these induced genes may be affected tumor infiltrating macrophages phenotype and tumor growth inhibition.

Free Research Field

泌尿器

Academic Significance and Societal Importance of the Research Achievements

治療抵抗性腫瘍は殺細胞性化学療法のみならず免疫チェックポイント阻害剤の奏効率も低い。また、治療抵抗性腫瘍においては腫瘍組織内に多くのマクロファージが浸潤しているとされており腫瘍進展、治療抵抗性に寄与しているとされる。腫瘍組織内マクロファージの表現型を変化させることは治療抵抗性を変化させるとともに、既存の化学療法・免疫チェックポイント阻害薬への感受性を改善することにつながるものと考えられる。また、これらのことは治療抵抗性腫瘍に対する治療戦略の開発だけでなく治療選択肢の拡大につながるものと考える。

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Published: 2023-01-30  

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