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2023 Fiscal Year Final Research Report

iPS cell-derived macrophage therapy regulating tumor micro environment

Research Project

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Project/Area Number 21K08351
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53050:Dermatology-related
Research InstitutionKumamoto University

Principal Investigator

FUKUSHIMA SATOSHI  熊本大学, 大学院生命科学研究部(医), 教授 (50398210)

Project Period (FY) 2021-04-01 – 2024-03-31
Keywordsメラノーマ / がん免疫 / マクロファージ / 腫瘍微小環境 / iPS細胞
Outline of Final Research Achievements

In cases where immune checkpoint inhibitors (ICIs) are ineffective, controlling the tumour microenvironment is considered a solution. The use of iPS cells as a source of therapeutic cells allows an unlimited number of cells to be obtained and genetically modified to have an immunomodulatory function. In a mouse melanoma model, we have confirmed that mouse iPS cell-derived macrophages genetically modified to produce interferon-β show an add-on effect when PD-1 inhibitions are inadequately effective. The mechanism of their efficacy was also analysed. It was suggested that genetically modified iPS cell-derived macrophages could be a promising treatment for ICI failure.

Free Research Field

皮膚科学

Academic Significance and Societal Importance of the Research Achievements

ICIが無効な腫瘍微小環境を変えようという試みは、全世界で競合している分野であるが、未だ臨床的成果を挙げるに至った例はない。本研究により種々の遺伝子改変iPS細胞由来マクロファージが、ICIの無効な腫瘍微小環境を変え、腫瘍抑制効果をマウスモデルで示したことは、今後のヒトへの臨床開発に向けて大きく弾みをつけるものである。今後、本研究結果を元にヒトiPS細胞を用いて研究に進めていく。その成果がさらにヒトの臨床試験まで到達し、有効性を示すことができれば、iPS細胞という日本が世界にさきがけた発明を生かし、機能をもった免疫細胞を誘導し、がん治療に応用するという大きな意義を持つ。

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Published: 2025-01-30  

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