We evaluated lipophilicity and biodistribution of a series of 99mTc(CO)3-ether isonitrile complexes to determine whether different lipophilicity and structure of isonitrile ligands would improve the imaging properties of the radiopharmaceutical for the heart. Novel 99mTc(CO)3-MIBI analogs were prepared and analyzed by radio-HPLC, and their lipophilicity was determined. These new complexes could be bi- or tri-substituted in specified pH conditions like 99mTc(CO)3-MIBI. These new complexes exhibited low liver, lungs and blood uptake compared with [99mTc(CO)3(MIBI)3]+ though their heart uptake was not so high. Among these complexes, [99mTc(CO)3(EPI)2(OH2)]+ showed higher target to non-target ratios at 5 and 30 min post-injection than that of [99mTc(CO)3(MIBI)3]+. Copyright © 2007 John Wiley & Sons, Ltd.
我们评估了一系列99mTc(CO)3-
乙醚异腈复合物的亲脂性和
生物分布,以确定异腈
配体的不同亲脂性和结构是否能够改善心脏放射性药物的成像特性。我们制备了新型99mTc(CO)3-MIBI类似物,并通过放射-HPLC对其进行了分析,确定了它们的亲脂性。这些新复合物在特定的pH条件下可以像99mTc(CO)3-MIBI一样进行双取代或三取代。与[99mTc(CO)3(MIBI)3]+相比,这些新复合物在肝脏、肺部和血液中的摄取量较低,但心脏摄取量并不高。在这些复合物中,[99mTc(CO)3(E
PI)2(OH2)]+在注射后5分钟和30分钟的目标与非目标比率高于[99mTc(CO)3(MIBI)3]+。版权所有 © 2007 John Wiley & Sons, Ltd.