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针对黑色素瘤患者的PET成像:一个试点研究
Neeta Pandit-Taskar1,2, Audrey Mauguen3, Denise Frosina4
1Department of Radiology, Memorial Sloan Kettering Cancer Center.
Melanoma research
|June 25, 2025
概括
使用[18F]-BMS-986229的非侵入性正子发射断层扫描 (PET) 成像可以在免疫治疗期间在晚期黑色素瘤患者中评估编程死亡-1 (PD-L1) 表达异质性. 这种新型的PET追踪器显示了监测治疗反应和病变异质性的可行性.
科学领域:
- 在瘤学瘤学.
- 核医学就是核医学.
- 免疫治疗是一种免疫疗法.
背景情况:
- 黑色素瘤中编程死亡联体-1 (PD-L1) 表达异质,并且难以通过标准活检进行评估.
- 非侵入性成像提供了一种方法来评估PD-L1在多种病变中的表达.
- 评估PD-L1表达对于指导免疫治疗治疗决策至关重要.
研究的目的:
- 评估用[18F]-BMS-986229进行正子发射断层扫描 (PET) 影像成像的可行性,用于在晚期黑色素瘤患者中进行PD-L1表达的非侵入性评估.
- 在组合免疫疗法 (nivolumab和ipilimumab) 中纵向跟踪病变中的PD-L1表达异质性.
- 检查PD-L1 PET摄入量与免疫治疗临床反应之间的关系.
主要方法:
- 一个潜在的试点试验,涉及10名患有晚期黑色素瘤的患者,接受尼沃卢马布和伊皮利穆马布治疗.
- 使用[18F]-BMS-986229进行PD-L1PET成像,在基线和治疗开始6周后进行.
- PD-L1 PET吸收 (SUVmax) 与放射性反应 (RECIST) 和基线PD-L1与免疫组织化学 (IHC) 相相关.
主要成果:
- [18F]-BMS-986229在基线显示出可变的病变吸收率 (中位数SUVmax3.6),在大多数病变中在治疗6周后下降.
- 在可评估病变中,具有较高基线PD-L1PET吸收率 (平均SUVmax≥3.00) 的患者更有可能对治疗产生反应.
- 较高的基线SUVmax与较大的个体病变减少相关;PD-L1 PET与基于IHC的PD-L1表达具有较低的相关性.
结论:
- 用[18F]-BMS-986229进行PD-L1PET成像是一种可行的非侵入性方法,用于评估接受免疫治疗的黑色素瘤患者的PD-L1表达和异质性.
- 这种成像方法可能有助于监测治疗反应并了解PD-L1动态.
- 需要进行更大规模的研究来证实[18F]-BMS-986229 PET在免疫治疗中的实用性.
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