Described herein are Tz/TCO-based pretargeting strategies using an Al[18F]-NOTA-labeled tetrazine radioligand. This imaging strategy enables delineation of cancer at earlier time points compared to other imaging strategies and further decreases the radiation dose to healthy tissues compared to directly labeled antibodies. Al-based 18F imaging of small molecules, such as tetrazine, has not been previously achieved due to the decomposition of tetrazine during radiofluorination. Radiofluorination is advantageous over other radiolabeling methods because, in addition to having a shorter half-life, 18F is more readily available to produce and therefore integrated into hospital workflows.
本文描述了使用Al[18F]-NOTA标记的
四氮唑放射
配体进行Tz/TCO基于预靶向策略。与其他成像策略相比,这种成像策略使得癌症在较早的时间点能够被清晰地描绘出来,并且与直接标记
抗体相比,进一步降低了对健康组织的辐射剂量。基于Al的小分子18F成像,如
四氮唑,以前尚未实现,因为在放射
氟化过程中
四氮唑会分解。相比其他放射标记方法,放射
氟化具有优势,因为除了半衰期较短外,18F更容易获得并因此更容易融入医院工作流程中。