临床前对PD-L1进行抗体-PET成像
Emma L Brown1, Rachel A DeWeerd1,2, Abbey Zidel1
1Department of Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, United States.
Frontiers in nuclear medicine
|October 2, 2024
概括
阳离子发射断层扫描 (PET) 成像可视化实时的编程细胞死亡蛋白-1干-1 (PD-L1) 表达. 这种方法有助于预测癌症免疫治疗反应和理解瘤异质性.
科学领域:
- 在瘤学瘤学.
- 免疫治疗是一种免疫疗法.
- 放射化学 放射化学是指辐射化学.
背景情况:
- 针对免疫检查点抑制剂 编程细胞死亡蛋白-1 / -1 (PD-1 / PD-L1) 已经彻底改变了癌症治疗.
- 准确的患者选择PD-1/PD-L1阻塞仍然是一个挑战,因为基于活检的诊断在捕捉瘤异质性的局限性.
- 目前的方法无法完全预测反应,因为一些PD-L1-阴性瘤受益于免疫治疗,而一些PD-L1-阳性瘤则没有.
研究的目的:
- 审查PD-1/PD-L1针对癌症免疫治疗的定位子发射断层扫描 (PET) 成像的最新进展.
- 为突出扩展临床前模型和新型抗PD-L1抗体/片段的免疫PET开发.
- 讨论这些工具在评估PD-L1表达的空间和时间异质性的实用性.
主要方法:
- 在过去四年中发表的PD-1/PD-L1向免疫oPET研究的综述.
- 专注于临床前瘤模型和开发用于PET成像的抗PD-L1抗体和抗体碎片.
- 分析这些成像剂和模型如何解决PD-L1表达异质性.
主要成果:
- -89标记的抗PD-L1抗体的开发和应用使得PD-L1表达的体内可视化成为可能.
- 扩大PD-L1免疫PET的临床前模型和基于抗体的向剂.
- 证明 immunoPET 的潜力,以实时评估整个瘤的 PD-L1 异质性.
结论:
- 针对PD-1/PD-L1的免疫oPET为PD-L1表达和异质性的非侵入性评估提供了一个有希望的策略.
- 这项技术有可能改善患者选择免疫检查点抑制剂治疗的可能性.
- 进一步开发临床前模型和成像剂将提高PD-L1 immunoPET的临床实用性.
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