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2021 Fiscal Year Final Research Report

Consideration on the high activation mechanism of bispecific antibodies by multi-scale analysis for the design of next-generation antibodies

Research Project

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Project/Area Number 19H03511
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

Kumagai Izumi  東京農工大学, 工学(系)研究科(研究院), 客員教授 (10161689)

Co-Investigator(Kenkyū-buntansha) 田中 良和  東北大学, 生命科学研究科, 教授 (20374225)
真壁 幸樹  山形大学, 大学院理工学研究科, 准教授 (20508072)
浅野 竜太郎  東京農工大学, 工学(系)研究科(研究院), 教授 (80323103)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords二重特異性抗体 / マルチスケール解析 / 次世代抗体設計
Outline of Final Research Achievements

To elucidate the high activation mechanism of bispecific antibodies caused by the differences in the molecular configuration, we evaluated them through various analytical techniques. The result of evaluation of the intercellular cross-linking abilities using atomic force microscopy (AFM)-sensing revealed that it is important to have a structure that can cross-link cells with a stronger force for the induction of high activity. In addition, it was clarified that the effectiveness as a therapeutic agent can be explained by negative stain single particle analysis of the antibody-antigen complex using a transmission electron microscope.

Free Research Field

タンパク質工学、生物化学

Academic Significance and Societal Importance of the Research Achievements

既存の抗体医薬の治療満足度は必ずしも高くないため、より強力な薬効を示す次世代抗体の開発が進められている。二重特異性抗体は特に期待が寄せられている形態のひとつであり、このため高い活性をもたらす構造の解明は待ち望まれている。有効性と相関がみられた原子間力顕微鏡を用いた細胞間架橋度測定法、および治療薬としての有効性の外挿が期待される抗体抗原複合体の電子顕微鏡単粒子解析は、今後より実用的な二重特異性抗体の開発に寄与することが期待される。

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Published: 2023-01-30  

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