协同的甲蓝驱动的FAPI吸收机制促进了在高血压心脏病中检测心肌纤维化
Dimei Zhang1, Guiting Li2, Bingfeng Jiang3
1Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, China.
Molecular pharmaceutics
|September 9, 2025
概括
新的F-NOTA-FAPI-MB追踪器显示出在高血压心脏病 (HHD) 中检测心肌纤维化的前景. 这种纤维细胞激活蛋白 (FAP) 向剂提供了比[18F]F-FDG更好的成像.
科学领域:
- 核医学是一种核医学.
- 心血管成像 - 心血管成像
- 放射性药物开发的发展.
背景情况:
- 心肌纤维化是高血压心脏病 (HHD) 的关键特征,但其临床诊断具有挑战性.
- 纤维细胞激活蛋白 (FAP) 是纤维状况的潜在成像标.
研究的目的:
- 评价F-NOTA-FAPI-MB,一个针对FAP的标志物,用于检测HHD的老鼠模型中的心肌纤维化.
- 为了比较其诊断性能与其他FAP追踪器 ([18F]F-FAPI-42,[18F]F-NOTA-FAP2286) 和[18F]F-FDG.
- 评估其用于双模式 (PET/光) 成像的潜力.
主要方法:
- 在Sprague-Dawley大鼠中使用异二醇诱导高血压心脏病 (HHD).
- 在静脉注射[18F-NOTA-FAPI-MB,[18F]F-FDG,[18F]F-FAPI-42和[18F]F-NOTA-FAP2286.之后进行了PET/CT成像.
- 在切除的心脏组织上进行了ex vivo光成像.
- 进行了阻断实验,以评估标记物特异性.
主要成果:
- 所有三个针对FAP的探针都在HHD心脏中局部化了纤维活动.
- [18F]F-NOTA-FAPI-MB显示了瘤与背景比率 (TBR) 的最高增加和保留.
- [18F]F-FDG成像没有检测到HD心脏中的显著代谢变化.
- 活体成像证实了NOTA-FAPI-MB的积累.
结论:
- [18F]F-NOTA-FAPI-MB证明了作为高血压心脏病 (HHD) 双模态成像剂的潜力.
- 它通过MB协同作用的基于机制的准增强了心肌积累.
- [18F]F-FDG对于检测与HHD相关的心脏异常是无效的.
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