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双重向的阿尔法疗法减轻前列腺癌,增强免疫检查点阻塞疗法

Juan Sun¹, Jiangtao Yang², Jiakun Guo²

¹Biomedical Polymers Laboratory, College of Chemistry, Chemical Engineering and Materials Science, and State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou 215123, China; College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.

Journal of controlled release : official journal of the Controlled Release Society

|April 5, 2025

概括

一种新型的双特异性标有Actinium-225 (225Ac-S1R/PSMA-P) 的标签,显示出针对性阿尔法治疗前列腺癌的前景. 这种有针对性的方法有效地缩小瘤和增强免疫疗法,为晚期癌症治疗提供了新的希望.

科学领域:

核医学就是核医学.
在瘤学瘤学.
放射性药物化学放射性药物化学

背景情况:

向性阿尔法疗法 (TAT) 利用阿尔法发射放射性核酸来治疗癌症.
有效的输送工具对于TAT的临床应用至关重要.
前列腺特异性膜抗原 (PSMA) 是前列腺癌治疗的验证标.

研究的目的:

开发和评估一种针对西格玛-1受体 (S1R) 和PSMA的双特异性,标记为Actinium-225 (225Ac).
评估225Ac-S1R/PSMA-P在针对性阿尔法疗法和小鼠前列腺瘤的阿尔法免疫疗法的疗效.
在临床前模型中研究225Ac-S1R/PSMA-P的生物分布和治疗潜力.

主要方法:

使用225Ac.R的S1R/PSMA-P的合成和放射标记.
在RM1-PSMA+癌细胞中细胞结合,吸收和流出的体外评估.
在携带瘤的小鼠体内生物分布研究.
在LNCaP-FGC和RM1-PSMA+瘤模型中进行治疗疗效研究.
结合疗法与免疫检查点封锁.

主要成果:

225Ac-S1R/PSMA-P表现出高特异活性和放射稳定性,增强细胞结合和吸收.
在体内研究显示显著的瘤吸收 (34.7 ± 3.2% ID/g) 和有利的瘤脏比率 (12.2 ± 1.2) 超过7天.
单次注射225Ac-S1R/PSMA-P有效地减少了瘤的大小,并根除了已建立的瘤.
低剂量225Ac-S1R/PSMA-P增强了免疫检查点阻塞,导致了持久的无瘤生存和免疫记忆.

结论:

225Ac-S1R/PSMA-P是一种有前途的向放射性药物,用于前列腺癌治疗.
这种双重向的酸具有出色的瘤向和免疫激活能力.
这种药物对治疗晚期前列腺癌患者具有显著的临床潜力,包括与免疫疗法结合使用.

关键词:

检查点封锁疗法检查点封锁疗法免疫治疗是一种免疫疗法.核医学是一种核医学.前列腺癌是什么意思前列腺癌是什么意思放射性核酸治疗是一种放射性核酸疗法.

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