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2022 Fiscal Year Final Research Report

Nano cancer immunotherapy using memory NK cells against PD-1 blockade resistant tumor

Research Project

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Project/Area Number 20H03373
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 47020:Pharmaceutical analytical chemistry and physicochemistry-related
Research InstitutionHokkaido University

Principal Investigator

Nakamura Takashi  北海道大学, 薬学研究院, 助教 (20604458)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywordsデリバリーシステム / 脂質ナノ粒子 / アジュバント / がん免疫療法 / NK細胞 / メモリー細胞
Outline of Final Research Achievements

In this study, we developed lipid nanoparticles (LNPs) loaded with two adjuvants to effectively induce memory natural killer (NK) cells, and demonstrated the cancer immunotherapy against PD-1 blockade (immune checkpoint inhibition therapy) resistant tumor. LNPs loaded with two types of adjuvants efficiently induce memory NK and enhance therapeutic efficacy against mouse melanoma lung metastasis that showed the resistant to PD-1 blockade. In addition, prophylactic administration can strongly suppress melanoma lung metastasis, suggesting that it may be effective in preventing metastasis of cancers that are resistant to immune checkpoint inhibition therapy.

Free Research Field

薬物送達学

Academic Significance and Societal Importance of the Research Achievements

これまでにin vivoでメモリーNK細胞を誘導可能なシステムは報告されておらず、本研究にて開発したアジュバント搭載脂質ナノ粒子を用いたシステムが初めてである。それ故、学術的に高いインパクトを持つ。また、NK細胞のメモリー化を誘導することで、免疫チェックポイント阻害療法に耐性を持つがんに対する抗腫瘍活性の増強と転移予防効果を示すことから、現在のがん治療の課題を克服するための新しいがん免疫療法の開発に繋がる重要な知見である。

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Published: 2024-01-30  

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