[177Lu]Lu-PSMA SPECT/CT用于使用定量RECIP 1.0进行早期反应评估
Mutaz Kassas1, Louise Devriendt2, Martin Manley1
1Department of Nuclear Medicine, Institut Jules Bordet, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles, Rue Meylemeersch 90, Brussels, 1070, Belgium.
European journal of nuclear medicine and molecular imaging
|November 9, 2025
概括
使用RECIP 1.0对24小时SPECT/CT进行早期反应评估,在第二轮-177PSMA放射性治疗 (RLT) 后,可以确定转移性割抵抗性前列腺癌患者不太可能从继续治疗中受益.
科学领域:
- 核医学就是核医学.
- 在瘤学瘤学.
- 放射性药物疗法是一种放射性药物疗法.
背景情况:
- 转移性割抵抗性前列腺癌 (mCRPC) 需要有效的预后工具来治疗分层.
- 标记为PSMA放射性体疗法 (RLT) 的卢-177 (Lu) 是对mCRPC的有前途的治疗方法.
- 治疗反应的早期评估可以指导治疗决策.
研究的目的:
- 评估PSMA成像中响应评估标准的预后价值 (RECIP 1.0) 在Lu-PSMA-RLT的第二个周期.
- 评估RECIP 1.0对mCRPC患者无进展生存 (PSA-PFS) 和整体生存 (OS) 的预测能力.
主要方法:
- 对136名mCRPC患者的回顾性分析,这些患者接受了≥2次[177Lu]Lu-PSMA-I&T的治疗.
- 在治疗后24小时,在第1和第2周期进行SPECT/CT成像,以测量SUVmean,SUVmax和总瘤体积 (TTV).
- 被归类为RECIP-PD (进展性疾病) 或RECIP-non-PD的患者;使用考克斯回归和卡普兰-梅尔曲线进行生存分析.
主要成果:
- 在循环2的RECIP 1.0分类显著预测PSA-PFS和OS较短 (HR=3.6和HR=3.1,分别;p<0.001).
- 增加SUV平均值,TTV增加≥20%,新的病变与较差的结果有关.
- RECIP 1.0 显示出高预后准确性 (哈雷尔的C指数:PSA-PFS=0.80,OS=0.78).
结论:
- 量化RECIP 1.0应用到循环2177Lu-PSMA SPECT/CT作为一个独立的预后工具.
- 它可以早期识别mCRPC患者,不太可能从持续的Lu-PSMA-RLT中受益.
- 在临床实施治疗管理变化之前,建议进行前性验证.
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