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2020 Fiscal Year Final Research Report

Development of NKT cell-based precision cancer immunotherapy for glioblastoma patients

Research Project

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Project/Area Number 19K18379
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56010:Neurosurgery-related
Research InstitutionChiba University

Principal Investigator

Hara Ayaka  千葉大学, 医学部附属病院, 医員 (90792705)

Project Period (FY) 2019-04-01 – 2021-03-31
Keywords膠芽腫 / NKT細胞
Outline of Final Research Achievements

This study showed that CD1d, an antigen-presenting molecule for invariant natural killer T (iNKT) cells, was expressed on several patient glioblastoma cells. Although CD1d expression was low on glioblastoma stem-like cells, retinoic acid, which is the most common differentiating agent, upregulated CD1d expression in these cells and induced iNKT cell-mediated cytotoxicity. Next, we transiently transfected the CD1d-negative U87 cells with CD1d plasmid. CD1d-transfected U87 cells were sensitive to direct NKT cell-mediated cytotoxicity. Thus, CD1d expression may represent a novel target for NKT cell-based precision cancer immunotherapy for glioblastoma patients.

Free Research Field

脳腫瘍

Academic Significance and Societal Importance of the Research Achievements

予後不良な膠芽腫に対する新規治療法の開発は困難を極め、喫緊の課題となっている。本研究では、膠芽腫患者検体を解析し、NKT細胞に対する特異的な抗原提示分子であるCD1d陽性の腫瘍細胞が存在することを見出した。膠芽腫患者検体から樹立したstem-like cellにレチノイン酸を投与して分化誘導するとCD1d発現が増強し、NKT細胞は高い細胞傷害活性を示した。CD1d陰性膠芽腫細胞株にCD1dを強制発現させた場合にも、NKT細胞は高い細胞傷害活性を示した。これらの結果は、膠芽腫におけるCD1d発現は、NKT細胞を用いた膠芽腫プレシジョン医療の新規標的となりうることを示している。

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Published: 2022-01-27  

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