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2023 Fiscal Year Final Research Report

Construction of a Preclinical Screening Model Based on Direct Comparison of CAR-T Cells and BiTE

Research Project

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Project/Area Number 21K15569
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionEhime University

Principal Investigator

Maruta Masaki  愛媛大学, 医学部附属病院, 助教 (10895866)

Project Period (FY) 2021-04-01 – 2024-03-31
Keywords抗体療法 / 二重特異性抗体 / 多発性骨髄腫
Outline of Final Research Achievements

We conceived the idea of generating dual-specificity antibodies targeting the human Fc region (referred to as Bridging-BiTE or B-BiTE), during the exploration of optimal antibodies for creating BiTE (Bispecific T-cell Engager), which serves as the basis for BiTE development. By combining these novel B-BiTE constructs with existing antibodies, theoretically, any antibody could be formulated as a BiTE. We conducted proof-of-concept (POC) validation, and as anticipated, the complexes formed by mixing antibody formulations with B-BiTE not only activated NK cells and T cells in vitro but also demonstrated significantly enhanced efficacy compared to antibodies alone in vivo.

Free Research Field

抗体療法

Academic Significance and Societal Importance of the Research Achievements

本研究を通じて得られた知見は、多発性骨髄腫に対する多様な抗体製剤と組み合わせ可能であるばかりでなく、理論上は他の固形腫瘍に対する治療と組み合わせた新たな免疫療法として応用可能である。治療手段としてのBiTEの応用可能性に加えて、(多角的なvalidationが必要であるが)既存の抗体からBiTEを作成した場合の有効性についてスクリーニングすることが可能と思われ、大きな応用可能性を有する。
研究成果は学術雑誌を通じて公表済であり、editorialにおいても多発性骨髄腫に対する免疫療法の新たな展開としてコメントされるなど高い評価を得ている。

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Published: 2025-01-30  

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