[68Ga]Ga-NOTA-T4免疫PET成像用于评估固体瘤患者的TROP2表达
Donglang Jiang1, Zhaohui Chu2, Yanfei Wu1
1Department of Nuclear Medicine & PET Center, Huashan Hospital, Fudan University, Shanghai, 200040, China.
概括
加-68 (Ga) 标记的Ga-NOTA-T4免疫 pozitron 发射断层扫描 (immunoPET) 显示出对可视化热囊细胞表面抗原2 (TROP2) 在固体瘤中的表达有希望. 这种技术可能有助于TROP2向治疗决策和瘤诊断.
科学领域:
- 核医学就是核医学.
- 在瘤学瘤学.
- 放射化学 放射化学是指辐射化学.
背景情况:
- 热囊细胞表面抗原2 (TROP2) 是癌症治疗的目标.
- 对TROP2表达的非侵入性成像对于指导治疗决策至关重要.
- 标有-68 (Ga) 标记的痕迹剂为免疫-位子发射断层扫描 (immunoPET) 提供了潜在的可能性.
研究的目的:
- 评估Ga-标记的Ga-NOTA-T4 PET/CT在固体瘤中对TROP2表达的诊断效用.
- 为了比较[68Ga]Ga-NOTA-T4 PET/CT与用-18标记的氧糖 ([18F]FDG) PET/CT的性能.
- 通过免疫组织化学测定[68Ga]Ga-NOTA-T4摄入量与TROP2表达水平之间的相关性.
主要方法:
- 预期招募26名患有固体瘤的患者进行[68Ga]Ga-NOTA-T4 PET/CT.
- 使用标准化吸收值 (SUVmean,SUVmax) 和目标与背景比率 (TBR) 来量化标志物吸收.
- 免疫组织化学 (IHC) 瘤比例得分 (TPS) 用于评估TROP2表达.
主要成果:
- [68Ga]Ga-NOTA-T4显示出预期的生物分布,脏和胰腺的吸收率高,大脑和肌肉的吸收率低.
- 这两种标记器都检测到所有初级/复发性瘤,但[68Ga]Ga-NOTA-T4的SUVmax和TBR低于[18F]FDG.
- [Ga]Ga-NOTA-T4吸收与TROP2表达 (TPS) 有正相关,与[F]FDG不同,并检测出[F]FDG错过的两个大脑转移.
结论:
- [68Ga]Ga-NOTA-T4 PET/CT是一种有前途的非侵入性方法,用于评估TROP2表达和诊断固体瘤.
- 在特定的临床场景中,这种追踪剂可能比[18F]FDG PET/CT具有优势,特别是在针对TROP2的治疗中.
- 与IHC的相关性证实了Ga-NOTA-T4 PET/CT反映实际TROP2瘤负担的潜力.
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