评估的-和cis-4-[18F]甲巴丁用于大脑PET成像
Yu-Peng Zhou1, Marc D Normandin1, Vasily Belov1
1Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States.
ACS chemical neuroscience
|November 10, 2023
概括
研究人员开发了两种新的放射性标记的 gabapentin 标记剂,用于成像大脑α2δ受体. 一个标记器,[18F]cGBP4F,显示出使用PET扫描对大脑中的这些受体进行成像的潜力.
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:
- 加巴丁是一种药物,向电压依赖通道的α2δ子单元,用于神经疾病.
- 放射性化 gabapentin 衍生物 ([18F]tGBP4F 和 [18F]cGBP4F) 之前已经被证明会在受伤的神经中积累.
- 在大脑疾病中 gabapentin 的实用性需要研究成像其目标,大脑中的α2δ受体.
研究的目的:
- 评估放射性化 gabapentin 衍生物 ([18F]tGBP4F 和 [18F]cGBP4F) 在脑中的α2δ受体成像方面的潜力.
- 为这些放射标记物开发自动化放射合成方法.
- 用PET成像来评估非人类灵长类动物中放射标记物的脑吸收,代谢稳定性和可取代性.
主要方法:
- [18F]tGBP4F和[18F]cGBP4F的自动化放射合成.
- 在成年 rhesus macaques 中进行动态正子发射断层扫描 (PET) 成像.
- 进行了PET扫描,并没有加巴丁的预给药,以评估标记物位移.
- 动力建模和图形分析 (洛根,MLA1) 用于量化.
主要成果:
- 这两种放射性追踪剂都表现出高的代谢稳定性和低的血蛋白结合.
- [18F]tGBP4F显示大脑吸收率低,并且没有被 gabapentin 取代.
- [18F]cGBP4F显示中度大脑吸收,并被 gabapentin 部分取代.
- 动力建模证实,一个单组织区模型准确地描述了大脑吸收,表明了强大的量化.
结论:
- 该研究成功开发和评估了用于大脑α2δ受体成像的放射性化 gabapentin衍生物.
- [18F]cGBP4F显示为对大脑α2δ受体的PET成像剂具有前途.
- 这项研究促进了对 gabapentinoid 机制的理解,并为神经成像研究提供了一个工具.
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