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2021 Fiscal Year Final Research Report

Development of the regulation of tumor macrophages dynamics using microcurrent stimulation

Research Project

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Project/Area Number 20K21901
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 90:Biomedical engineering and related fields
Research InstitutionKyushu University

Principal Investigator

Matsunaga Naoya  九州大学, 薬学研究院, 教授 (10432915)

Project Period (FY) 2020-07-30 – 2022-03-31
Keywordsマイクロ電流 / 体内時計 / PD-1 / 腫瘍免疫
Outline of Final Research Achievements

Previous research has shown that microcurrent stimulation (MCS) can increase the expression of clock genes, the body's internal clock, and normalize the disrupted sleep-wake behavioral rhythm.
The company is building a system that can These results have been published in an overseas journal (BBRC, 2019), a patent application (Patent Application 2019-028425), and support for a Kyushu University venture start-up. The applicant has newly demonstrated that microcurrent stimulation affects the dynamics of tumor-associated macrophages (TAMs), which are associated with tumor growth. They also revealed a mechanism for the rhythmic regulation of PD1 expression (Matsunaga N et al., Molecular Cancer Research 2022).

Free Research Field

医療機器開発

Academic Significance and Societal Importance of the Research Achievements

癌は未だに死因1位であり、アンメットメディカルニーズの高い疾患である。近年、ノーベル賞受賞者の本庶 佑先生が開発したPD-1を標的とする癌免疫療法は、これまでの抗癌剤と比較し有効性が高いとされている。しかし、PD-1阻害剤の奏効率は単剤で20-30%であり、併用療法においても30-50%とまだまだ改善の余地が残る。また治療中に起こる免疫活性化に関連する副作用は、体内における半減期が長い抗体医薬品では、コントロールしにくい点も注目されている。そこで本研究ではマイクロ電流刺激による新たな癌免疫療法の開発につながった。現在、ベンチャー企業を立ち上げ臨床応用に向けた取り組みに進んでいる。

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Published: 2023-01-30   Modified: 2025-01-30  

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