向大脑 NaV1.8 用[11C]Suzetrigine进行成像
Ramya Tokala1, Torben D Pearson1, Braeden A Mair1
1Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
Pharmaceuticals (Basel, Switzerland)
|December 31, 2025
概括
研究人员开发了一种新型的正电子发射断层扫描 (PET) 追踪器,[11C]suzetrigine,以可视化大脑中的NaV1.8通道用于疼痛研究. 在体内研究表明,P-glycoprotein (P-gp) 流量限制在活大脑中的NaV1.8的准确量化.
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.
- 药理学 药理学是指药理学的学科.
背景情况:
- 数以百万计的人遭受急性和慢性疼痛,缺乏用于中枢神经系统 (CNS) 疼痛机制的分子成像工具.
- 电压导入的通道NaV1.8通过增强感知神经元刺激性,对神经病痛至关重要.
- 开发NaV1.8的PET追踪器可以在中枢神经系统中非侵入性地量化这个目标,从而推进疼痛神经生物学理解.
研究的目的:
- 开发一种针对NaV1.8通道的新型正电子发射断层扫描 (PET) 成像探针.
- 评估[11C]suzetrigine作为PET追踪剂的适用性,用于体内对中枢神经系统中NaV1.8的量化.
- 调查影响[11C]suzetrigine体内表现的因素.
主要方法:
- 在式对接和中枢神经系统多参数优化 (MPO) 分析suzetrigine.
- 用[11C]甲基化物对苏泽特里金进行放射性标记,以产生[11C]苏泽特里金.
- 在实验室结合测定 (自发射,和结合) 和在实验室PET成像在老鼠.
- 在基线和预处理条件下的标记物行为评估 (未标记的苏泽特里金,维拉帕米尔,A-803467).
主要成果:
- 在 silico 分析中预测了suzetrigine的有利结合和足够的大脑透.
- [11C]苏瑞金是以高放射性化学产量和纯度合成的.
- 在体外测定证实了[11C]苏泽特里金与NaV1.8的和和选择性结合 (KD = 0.1nM).
- 在体内PET成像显示了快速的大脑吸收,但预处理后有意想不到的信号增加,主要是由于P-gp流出.
结论:
- [11C]Suzetrigine显示出作为一流的NaV1.8-PET追踪剂的潜力,因为它在体外具有很高的亲和力和选择性.
- 在体内表现受到P-glycoprotein (P-gp) 介导的外流的阻碍,这使得大脑中NaV1.8的准确量化变得复杂.
- 流量输送器显著影响中枢神经系统的辐射追踪器的发展,需要策略来缓解用于离子通道成像的P-gp相互作用.
相关概念视频
Brain Imaging
629
Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
629
Imaging Studies II: Positron Emission Tomography and Scintigraphy
460
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
460
![Semi-quantitative Assessment Using [18F]FDG Tracer in Patients with Severe Brain Injury](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F58641.jpg&w=3840&q=50)
![Radiosynthesis of 1-2-[18F]Fluoroethyl-L-Tryptophan using a One-pot, Two-step Protocol](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F63025.jpg&w=3840&q=50)
![PET Imaging of Neuroinflammation Using [11C]DPA-713 in a Mouse Model of Ischemic Stroke](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F57243.jpg&w=3840&q=50)