针对阿尔茨海默氏病的F-18西格玛-1受体放射追踪剂的设计,合成和表征
Hao Jiang1, Sandip B Jadhav1, Anil Kumar Soda1
1Department of Radiology, Washington University School of Medicine, St Louis, MO, 63110, USA.
European journal of medicinal chemistry
|February 18, 2026
概括
针对西格玛-1受体 (σ1R) 的新正电子发射断层扫描 (PET) 放射标志物显示出对阿尔茨海默病 (AD) 诊断的希望. (-) - [18F]13显示大脑吸收率高,药理动力学良好,使其成为阿尔茨海默病成像的主要候选者.
科学领域:
- 神经科学是一个神经科学.
- 放射化学 放射化学是指辐射化学.
- 医疗成像医学成像
背景情况:
- 西格玛-1受体 (σ1R) 与阿尔茨海默氏症 (AD) 病原发生有关.
- 对 σ1R 的正子发射断层扫描 (PET) 成像为阿尔茨海默病提供了一种新的诊断和预后策略.
- 之前的研究发现了有前途的s1R放射追踪物,需要进一步开发.
研究的目的:
- 为了合成和表征用于AD成像的新型18F标记的s1R放射追踪器.
- 评估这些新型放射性追踪剂的体外和体内性能.
- 确定最有前途的临床翻译候选人.
主要方法:
- 合成了三个新的18F标记的s1R放射标记物: (-) - [18F]13, (-) - [18F]14,和 (-) - [18F]21.
- 在体外测定功效和选择性的测试.
- 实体生物分布,自发射学和免疫组织学研究.
- 在小鼠 (CD1,3xTg-AD) 和的体内PET成像.
- 放射性代谢物分析.
主要成果:
- 所有合成的放射追踪剂都表现出高产量和纯度.
- 在体外和体内研究证实了对所有候选物质的强大和选择性 σ1R 结合.
- PET成像显示小鼠的大脑吸收率高, σ1R特异性高.
- 在3xTg-AD小鼠中观察到脑中放射标记物吸收的减少,与神经元 σ1R 表达的减少相关.
- (-) - [18F]13在中显示了高脑吸收率,良好的体内特异性和有利的脑洗动力学.
结论:
- 新的18F标记的s1R放射追踪器成功地量化了AD小鼠模型中减少的s1R表达.
- (-) -[18F]13因其最佳成像特性和有利的药理动力学而成为最有前途的候选者.
- 这种放射性追踪器具有通过PET成像来推进AD诊断和预后的巨大潜力.
相关概念视频
Positron Emission Tomography
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 being...
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 being...
Imaging Studies II: Positron Emission Tomography and Scintigraphy
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


