68Ga-DOTA-TFpep针对森-弗里登里希抗原进行PET成像
Nianting Ju1,2, Boyu Tan2,3, Hongyue Lou2
1Department of Nuclear Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China.
Molecular pharmaceutics
|December 15, 2025
概括
一个新的PET探针68Ga-DOTA-TFpep有效地准了Thomsen-Friedenreich (TF) 抗原在乳腺瘤中. 这种新型探针与以前的药物相比,显示出较好的瘤-肝脏比率,为TF抗原向癌症成像提供了一个有前途的工具.
科学领域:
- 核医学就是核医学.
- 放射性药物化学 放射性药物化学
- 在瘤学瘤学.
背景情况:
- 森-弗里登里希 (TF) 抗原是一种重要的瘤相关碳水化合物抗原,使其成为癌症诊断和治疗的关键标.
- 针对TF抗原的现有基于的放射性药物,如64Cu-NO2A-TFpep,由于瘤与肝脏的比例较差,由于放射性核素的肝脏保留导致了有限的成功.
- 对于有效的TF抗原成像,需要新的,高度特定的PET探头.
研究的目的:
- 合成和评估一种新的正电子发射断层扫描 (PET) 探头DOTA-TFpep,用于向TF抗原.
- 评估使用68Ga对DOTA-TFpep进行放射标记的可行性,以改善TF抗原表达乳腺瘤的PET成像.
- 为了比较68Ga-DOTA-TFpep探头的性能与现有的TF准剂.
主要方法:
- 使用DOTA化剂合成DOTA-TFpep,以增强水友特性和放射性标记.
- 用68Ga对DOTA-TFpep进行放射性标记,并使用无线电HPLC确认纯度 (>98%) 和稳定性.
- 在体外验证使用TF抗原表达细胞系的免疫光和细胞吸收研究 (4T1,K1).
- 在异种移植模型中进行了高 (4T1) 和低 (K1) TF抗原表达的体内生物分布和PET成像研究.
主要成果:
- 新型探测器68Ga-DOTA-TFpep已成功合成,具有高纯度和稳定性的放射标记.
- 试验室研究证实了TF抗原表达和探针的特定细胞吸收.
- 在体内研究表明,相比64Cu-NO2A-TFpep,有利的药理动力学,特定瘤吸收和肝脏吸收显著降低,导致瘤与肝脏的比率更高.
结论:
- 合成的68Ga-DOTA-TFpep探针在体内表现出TF抗原的优异瘤向和成像特性.
- 探测器显示了比以前报告的药物更好的性能,特别是在减少肝脏吸收方面.
- 68Ga-DOTA-TFpep代表了对TF抗原阳性乳腺瘤的PET成像的有前途的分子探针.
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