增强近红外抗CEA抗体的光,用于可视化结肠直肠癌,使用修改的甲氨酸
K Cox1,2, J Jitender3, S Mehta3
1Department of Surgery, University of California San Diego, San Diego, CA, USA.
Molecular imaging and biology
|February 10, 2026
概括
新的FNIR-Tag染料改善了光引导手术 (FGS) 的瘤成像. 与传统染料相比,这些新型探针提供了更好的瘤向和生物分布,推进了癌症诊断.
科学领域:
- 生物医学工程 生物医学工程
- 在瘤学瘤学.
- 分子成像学分子成像学
背景情况:
- 光导向手术 (FGS) 需要瘤特定的探针来实现高对比度.
- 传统的近红外 (NIR) 光体可能会对探针的药理动力学产生负面影响,导致瘤向不佳.
研究的目的:
- 为了评估与抗癌胚胎抗原抗体 (M5A) 结合的新型电荷平衡胺色素染料 (FNIR-Tag-766和FNIR-Tag-804).
- 在结肠直肠癌模型中,将它们的性能与标准抗体-染料合物 (M5A-IR800CW) 相比较.
主要方法:
- 结合FNIR-Tag染料和IR800CW与M5A抗体的结合.
- 在皮下和正管结肠直肠癌异种移植小鼠模型中的评估.
- 平均光强度 (MFI),瘤与背景比率 (TBR) 和ex vivo生物分布的比较.
主要成果:
- 与M5A-IR800CW相比,M5A-FNIR-766显示出更高的MFI和显著改善的TBR.
- 活体分析显示,96小时后,M5A-FNIR-Tag结合物的瘤积累增加和肝脏信号减少.
- 两种异种移植模型的结果一致,包括正位体模型.
结论:
- 与抗体结合的充电修饰FNIR-Tag染料产生了优异的瘤特异信号和生物分布.
- 这种内在的光体设计为FGS提供了临床上可翻译的进步.
- 这种方法可以增强瘤向,而不需要复杂的生物结合策略.
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