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用 (2S,4R)-4-[¹⁸F]FGln检测KRAS突变,用于非侵入性的PDAC诊断

Song Liu¹, Futao Liu¹, Xingguo Hou¹

¹State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Beijing Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), Department of Nuclear Medicine, Peking University Cancer Hospital & Institute, Beijing 100142, China.

Molecular pharmaceutics

|March 8, 2024

概括

(2S,4R)-4-[18F]FGln PET成像显示,胰腺管腺癌 (PDAC) 模型中具有KRAS G12D和G12C突变的质氨基酸摄取量有所不同. 这种标记物可能有助于检测特定的KRAS突变,并指导PDAC治疗.

科学领域:

在瘤学瘤学.
放射化学放射化学是指辐射化学.
分子成像学分子成像学

背景情况:

胰腺管道腺癌 (PDAC) 是一种具有不良预后的侵袭性癌症.
针对KRAS突变 (G12D,G12C) 的向治疗对于PDAC治疗至关重要.
KRAS突变影响癌细胞的谷氨胺代谢和依赖性.

研究的目的:

在具有不同KRAS突变的PDAC模型中调查谷氨胺依赖异质性.
评估 (2S,4R) -4-[18F]FGln对于KRAS突变PDAC的非侵入性成像的实用性.
为了将标记物摄取与特定的KRAS突变状态相关联.

主要方法:

使用了两个PDAC小鼠模型:一个具有KRAS G12D (PANC-1) 和一个具有KRAS G12C (MIA PaCa-2) 突变.
静脉注射 (2S,4R) -4-[18F]FGln,并进行正子发射断层扫描 (PET) 成像.
分析了PET成像特征,包括感兴趣地区的SUVmax,以及生物分布数据 (T/M,T/B比率).

主要成果:

与KRAS G12C (MIA PaCa-2) 瘤相比,在KRAS G12D (PANC-1) 瘤中观察到显著更高的SUVmax.
(2S,4R) -4-[18F]FGln在G12D模型中显示出更大的瘤积累和更高的T/M和T/B比率.
根据KRAS突变状态,证明了对标记物的差异性吸收.

结论:

具有KRAS G12D和G12C突变的PDAC细胞表现出不同的谷氨胺吸收模式.
(2S,4R)-4-[18F]FGln PET成像可以区分KRAS G12D和G12C突变.
这种放射性追踪器有可能指导基于KRAS突变状态的PDAC治疗策略.

关键词:

(2S,4R) -4-[18F]FGlnnn 在线播放在KRAS突变中发生突变.在PET成像中使用PET成像.

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