在前列腺癌中新点CDK19的PET成像
Dong Dai1,2, Jiang Yu3, Ting Huang3
1Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for China, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 300000, Tianjin, China.
概括
这项研究介绍了68Ga-CDK19 PET/CT作为前列腺癌的新型成像工具,即使在低PSMA表达或神经内分泌前列腺癌的情况下也是有效的. 这种新方法有助于检测前列腺癌病变,无论PSMA状态如何.
科学领域:
- 在瘤学瘤学.
- 分子成像分子成像技术
- 基因组学就是基因组学.
背景情况:
- 前列腺特异性膜抗原 (PSMA) -正子发射断层扫描 (PET) 是前列腺癌的关键诊断工具,但其有效性在神经内分泌前列腺癌 (NEPC) 和低PSMA前列腺癌中有限.
- 对于某些前列腺癌亚型存在诊断盲点,需要识别新的成像点.
研究的目的:
- 确定前列腺癌的新型诊断标,特别是低表达NEPC和PSMA的瘤.
- 评估针对CDK19的新型小分子在前列腺癌中用于PET成像的诊断潜力.
主要方法:
- 利用癌症基因组图谱 (TCGA) 和患者队列来识别高风险转移性前列腺癌中CDK19表达.
- 采用了体外细胞吸收和体内成像研究,使用异种移植小鼠模型与 ((Ga) -68标记的CDK19向小分子 (68Ga-IRM-015-DOTA).
- 进行阻断试验和PET/CT成像,以评估各种前列腺癌模型中的标特异性和吸收率,包括NEPC和割抵抗性前列腺癌 (CRPC).
主要成果:
- 发现CDK19在高风险的转移性前列腺癌中过度表达,与转移性状态和瘤阶段相关,独立于PSMA和PSA水平.
- 68Ga-IRM-015-DOTA对前列腺癌细胞表现出特异性,与基于PSMA的成像不同,在NEPC和CRPC异种移植中显著吸收.
- 使用68Ga-CDK19的PET/CT成像在体外,体内和患者衍生异种移植 (PDX) 模型中有效检测出病变,不论PSMA表达如何.
结论:
- 68Ga-CDK19 PET/CT代表了一种新且有效的成像技术,用于检测前列腺癌病变,包括那些具有低或缺少PSMA表达的病变.
- 这种新的PET追踪器可以作为前列腺癌的有价值的预测生物标志物,使得分子亚型独立于PSMA状态.
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