The present invention discloses a radioisotope 18F substituted thiamine, synthesis method, and use thereof in small animal PET/CT imaging. The radioisotope 18F substituted thiamine has a structure of
The synthesis method comprises radiochemical synthesis by using existing precursors. In the present invention, the hydroxyl in the hydroxyethyl on the thiazole cycle of thiamine is replaced by radioisotope 18F, to prepare a PET tracer. The radioisotope 18F substituted thiamine of the present invention successfully enters the brains of various strains of mice, and the uptake in the brains of thiamine-deficient mice is obviously greater than that in normal control. The present invention is useful in the preparation of a brain imaging tracer for clinical trials of Alzheimer's disease and tumors.
本发明公开了一种放射性同位素18F取代
硫胺素、合成方法及其在小动物PET/CT成像中的应用。放射性同位素 18F 取代
硫胺素的结构为
合成方法包括利用现有前体进行放射
化学合成。在本发明中,用放射性同位素 18F 取代
硫胺素噻唑环上羟乙基中的羟基,制备 PET 示踪剂。本发明的放射性同位素 18F 替代
硫胺素能成功进入不同品系小鼠的大脑,
硫胺素缺乏的小鼠大脑摄取量明显高于正常对照组。本发明可用于制备脑成像示踪剂,用于阿尔茨海默病和肿瘤的临床试验。