双准PET追踪器使酶介导的自我组装成为可能,用于对豆类活动的PET成像
Chunmei Lu1, Ke Li1, Hongjie Xi1
1NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi 214063, China.
ACS applied materials & interfaces
|September 13, 2023
概括
新的双位射线追踪器使得增强的正子发射断层扫描 (PET) 能够对瘤中的木素活性进行成像. 这些探针在发现豆类蛋白时自组装,改善了癌症诊断和预后的瘤可视化.
科学领域:
- 生物医学成像技术 生物医学成像技术
- 分子探头分子探头
- 癌症的诊断 癌症的诊断
背景情况:
- 列古胺是一种 lysosomal cysteine 蛋白酶,在各种瘤中过度表达,并作为潜在的癌症生物标志物.
- 精确检测木素活性对于早期癌症诊断和预后至关重要.
- 使用目标启用自组装的小分子探测器显示出分子成像应用的前景.
研究的目的:
- 开发和评估新型双位射线追踪器,用于正电子发射断层扫描 (PET) 图像测试.
- 为了研究这些由豆类蛋白介导的痕迹剂的自我组装特性.
- 评估这些标记物的有效性,以可视化豆胺过度表达的瘤in vivo.
主要方法:
- 合成了两个新的F标记的双重定位无线电追踪器,SF-AAN-M和SF-AAN-HEM.
- 评估放射性标记产量和放射性化学纯度.
- 评估通过降解剂和豆类蛋白激活标记物,从而导致自我组装.
- 在使用PET成像的树脂蛋白过度表达细胞和瘤的体外和体内研究.
主要成果:
- 这两种放射标记物 ([18F]SF-AAN-M和[18F]SF-AAN-HEM) 都以高产率 (>50%) 和纯度 (>99%) 合成.
- 随着减少剂和豆素的激活,观察到标记物自我组装,增强了豆素阳性细胞和瘤中的保留.
- 色素向的吗啡林部分改善了瘤的吸收和保留.
- [18F]SF-AAN-HEM表明肝脏吸收减少和高瘤与背景比率,产生优越的信号与噪声.
结论:
- 具有豆类胺介导自组装特性的双重定位射线追踪器对于PET成像是有效的.
- 开发的标记物,特别是[F]SF-AAN-HEM,显示出在体内监测瘤中木素活性的显著潜力.
- 这些发现表明癌症诊断和预后的有希望的新工具.
更多相关视频
相关概念视频
Positron Emission Tomography
4.3K
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
4.3K
Imaging Studies II: Positron Emission Tomography and Scintigraphy
153
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Fundamental Principles of PET
153


