2022 Fiscal Year Final Research Report
New design of radiotheranostic agents that reduce renal radioactivity
Project/Area Number |
20H03619
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 52040:Radiological sciences-related
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Research Institution | Chiba University |
Principal Investigator |
Uehara Tomoya 千葉大学, 大学院薬学研究院, 教授 (10323403)
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Co-Investigator(Kenkyū-buntansha) |
高橋 和弘 福島県立医科大学, 公私立大学の部局等, 教授 (20370257)
田中 浩士 東京工業大学, 物質理工学院, 准教授 (40334544)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | 核医学診断 / 核医学治療 / プレターゲティング |
Outline of Final Research Achievements |
When radionuclide-labeled low-molecular-weight compounds are administered to the body, nonspecific accumulation in the kidney is observed. In this study, we proposed a new drug design to reduce the accumulation of radioactivity in the kidney by using a pretargeting method in which a compound that accumulates in the tumor is administered first, followed by administration of a radionuclide-labeled drug that binds to the initial compound, and evaluated the usefulness of this method. The results showed that this method reduced kidney radioactivity, but also reduced tumor radioactivity. This would be due to the fact that the initially administered compound remained in the blood. These results suggest that if the initial compound can be removed from the blood quickly after accumulation in the tumor, this method can achieve high accumulation in the tumor and low accumulation in the kidney.
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Free Research Field |
放射線化学
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Academic Significance and Societal Importance of the Research Achievements |
放射性核種標識低分子化合物を生体に投与すると、腎臓への非特異的集積が観察され、診断時における腎臓付近の診断能の低下や、治療時における腎毒性が危惧されている。この問題に対し、リジンなどの同時投与による競合的阻害、薬剤内に代謝性スペーサを導入した薬剤設計により、腎臓への集積の低減が行われている。本研究では、それらに加え、新たにプレターゲティング法により腎臓への非特異的集積を低減できる可能性を新たに示した。これらの結果は、今後の薬剤開発の参考になると考えられる。
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