Synthesis of functionalised HP-DO3A chelating agents for conjugation to biomolecules
作者:Alessandro Barge、Enrico Cappelletti、Giancarlo Cravotto、Aurelia Ferrigato、Luciano Lattuada、Fabio Marinoni、Lorenzo Tei
DOI:10.1039/b905369g
日期:——
Two novel bifunctional chelating agents (BFCAs) based on the structure of 10-(2-hydroxypropyl)-1,4,7-tetraazacyclododecane-1,4,7-triacetic acid (HP-DO3A) have been designed and synthesized. BFCAs are able to strongly coordinate metals (e.g.Gd(III)) and radiometals (e.g.90Y(III), 177Lu(III) and 111In(III)), and find applications in the synthesis of products for the imaging and treatment of several cancer types. Indeed, these two BFCAs have been employed in solid-phase peptide synthesis (SPPS) and coupled to well-known peptides such as bombesin and RGD analogues in order to target tumor cells. We also report here the conjugation of one of them to Lys8-oxytocin and radiolabeling with 111In(III) to obtain a new radiopharmaceutical product with potential applications in the diagnosis of tumors over-expressing oxytocin receptors.
设计并合成了两种基于10-(2-羟基丙基)-1,4,7-四氮杂环十二烷-1,4,7-三乙酸(HP-DO3A)结构的新型双功能配位剂(BFCAs)。BFCAs能够强力配位金属(如Gd(III))和放射性金属(如90Y(III)、177Lu(III)和111In(III)),并在多种癌症类型的成像和治疗产品的合成中找到应用。实际上,这两种BFCAs已被用于固相肽合成(SPPS),并与知名肽(如蛙毒素和RGD类似物)结合以靶向肿瘤细胞。在此我们还报告了其中一种与Lys8-催产素的结合,以及用111In(III)进行放射性标记,从而获得具有潜在应用于诊断过表达催产素受体肿瘤的新放射药物产品。