2023 Fiscal Year Final Research Report
iPS cell-derived macrophage therapy regulating tumor micro environment
Project/Area Number |
21K08351
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 53050:Dermatology-related
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Research Institution | Kumamoto University |
Principal Investigator |
FUKUSHIMA SATOSHI 熊本大学, 大学院生命科学研究部(医), 教授 (50398210)
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Project Period (FY) |
2021-04-01 – 2024-03-31
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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.
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Free Research Field |
皮膚科学
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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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