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双三元体PSMA治疗平台使PET成像和前列腺癌的光学检测成为可能

Yimin Chen¹, Haonan Yu², Wanjia Liu¹

¹Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China.

Journal of medicinal chemistry

|June 4, 2025

概括

一个新的双三前列腺特异性膜抗原 (PSMA) 向系统增强了前列腺癌 (PCa) 诊断的成像. 在临床前和人体研究中,这种治疗平台显示了瘤检测和保留的改善.

科学领域:

核医学是一种核医学.
放射化学放射化学是指辐射化学.
在瘤学瘤学.

背景情况:

目前的前列腺癌 (PCa) 成像剂缺乏最佳的灵敏度和对比度.
前列腺特异性膜抗原 (PSMA) 是PCa检测的关键生物标志物.

研究的目的:

开发和评估一种新型的双三基PSMA向的治疗系统,以改善PCa诊断.
在临床前和人体研究中评估新探针的诊断性能.

主要方法:

一系列双三基PSMA探针 (PSMA-T0-T6) 的合成,使用不同的链接器.
在瘤携带小鼠中使用[68Ga]Ga-PSMA-T3进行临床前评估,将摄取量和瘤与背景比率 (TBR) 与[68Ga]Ga-PSMA-11进行比较.
对光学成像剂 (ICG结合的PSMA-T6) 对瘤保留和特异性的评估.
这是首次在人体上使用[68Ga]Ga-PSMA-T3.3的正子发射断层扫描 (PET) 研究.

主要成果:

合成的探针显示出高的PSMA亲和力 (Ki = 0.11-0.60 nM).
[68Ga]Ga-PSMA-T3在临床前模型中表现出比[68Ga]Ga-PSMA-11更高的瘤吸收率和TBR.
在ICG-PSMA-T6中,瘤保留时间长,活体特异性高.
人类PET研究证实[68Ga]Ga-PSMA-T3对初级和转移性病变的可比或增强的检测率,特别是在肝脏和骨中,具有更高的TBR.

结论:

双三基PSMA平台为前列腺癌提供了增强的诊断灵敏度.
这种术后感系统显示出改善PCa检测和手术内管理的巨大潜力.

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