Synthesis and Biological Evaluation of Novel 99mTc-Labelled Bisphosphonates as Superior Bone Imaging Agents
作者:Ling Qiu、Wen Cheng、Jianguo Lin、Shineng Luo、Li Xue、Jing Pan
DOI:10.3390/molecules16086165
日期:——
A series of novel zoledronic acid (ZL) derivatives 1-hydroxy-3-(2-methyl-1H-imidazol-1-yl)propane-1,1-diyldiphosphonic acid (MIPrDP), 1-hydroxy-4-(2-methyl-1H-imidazol-1-yl)butane-1,1-diyldiphosphonic acid (MIBDP), and 1-hydroxy-5-(2-methyl-1H-imidazol-1-yl)pentane-1,1-diyldiphosphonic acid (MIPeDP) were prepared and successfully labeled with 99mTc in high labeling yields. The in vitro stability and in vivo biodistribution of 99mTc-MIPrDP, 99mTc-MIBDP and 99mTc-MIPeDP were investigated and compared. The biodistribution studies indicate that the radiotracer 99mTc-MIPrDP has highly selective uptake in the skeletal system and rapid clearance from soft tissues. The present findings indicate that 99mTc-MIPrDP holds great potential for use in bone imaging.
一系列新型唑来膦酸(ZL)衍生物 1-羟基-3-(2-甲基-1H-咪唑-1-基)丙烷-1,1-二基二膦酸(MIPrDP)、1-羟基-4-(2-甲基-1H-咪唑-1-基)丁烷-1、1-羟基-4-(2-甲基-1H-咪唑-1-基)丁烷-1,1-二基二膦酸(MIBDP)和 1-羟基-5-(2-甲基-1H-咪唑-1-基)戊烷-1,1-二基二膦酸(MIPeDP)。研究并比较了 99m锝-MIPrDP、99m锝-MIBDP 和 99m锝-MIPeDP 的体外稳定性和体内生物分布。生物分布研究表明,放射性示踪剂 99mTc-MIPrDP 在骨骼系统中的摄取具有高度选择性,并能迅速从软组织中清除。本研究结果表明,99m锝-MIPrDP 在骨成像中具有巨大的应用潜力。