Synthesis of DOTA-Conjugated Multimeric [Tyr<sup>3</sup>]Octreotide Peptides via a Combination of Cu(I)-Catalyzed “Click” Cycloaddition and Thio Acid/Sulfonyl Azide “Sulfo-Click” Amidation and Their in Vivo Evaluation
作者:Cheng-Bin Yim、Ingrid Dijkgraaf、Remco Merkx、Cees Versluis、Annemarie Eek、Gwenn E. Mulder、Dirk T. S. Rijkers、Otto C. Boerman、Rob M. J. Liskamp
DOI:10.1021/jm100246m
日期:2010.5.27
Herein, we describe the design, synthesis, and biological evaluation of a series of DOTA-conjugated monomeric, dimeric, and tetrameric [Tyr3]octreotide-based analogues as a tool for tumor imaging and/or radionuclide therapy. These compounds were synthesized using a Cu(I)-catalyzed 1,3-dipolar cycloaddition (“click” reaction) between peptidic azides and dendrimer-derived alkynes and a subsequent metal-free
在这里,我们描述了一系列基于DOTA的单体,二聚体和四聚体[Tyr 3 ]奥曲肽的类似物的设计,合成和生物学评估,这些类似物可作为肿瘤成像和/或放射性核素治疗的工具。肽叠氮化物和树枝状聚合物衍生的炔烃之间通过Cu(I)催化的1,3-偶极环加成反应(“点击”反应)合成这些化合物,随后通过硫代酸/磺酰叠氮化物酰胺化法(DOTA)进行无金属引入( “点击”反应)。在使用大鼠胰腺AR42J肿瘤细胞的竞争性结合测定中,单体[Tyr 3 ]奥曲肽缀合物显示出最高的结合亲和力(IC 50 = 1.32 nM),其次是二聚体[Tyr 3 ]奥曲肽(2.45 nM),[DOTA 0,Tyr 3 ]奥曲肽(2.45 nM)和四聚体[Tyr 3 ]奥曲肽(14.0 nM)。对具有皮下AR42J肿瘤的BALB / c裸鼠的生物分布研究表明,111 In标记的[Tyr 3 ]奥曲肽共轭物在pi 2 h时具有最高的肿瘤吸收(42