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Synthesis of a poly(Gd(III)-DOTA)–PNA conjugate as a potential MRI contrast agent via post-synthetic click chemistry functionalization

机译:通过合成后点击化学功能化合成聚(Gd(III)-DOTA)-PNA偶联物作为潜在的MRI造影剂

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Herein we present a method for the simultaneous, multiple conjugation of alkynyl-(Gd(III)-DOTA) moieties to a PNA oligomer possessing a domain of azide residues. This is achieved in a single Huisgen type copper-catalyzed azide alkyne cycloaddition (CuAAC) reaction after the oligomer assembly is completed. A triplex formed between the labelled PNA and riboadenylic acid, [(Gd(III)-DOTA)4–PNA]2:poly(rA), displayed higher relaxivities at any field strength compared to the single-stranded probe at the same concentration of Gd3+ ions as determined by nuclear magnetic resonance dispersion (NMRD) studies.
机译:本文中,我们提出了一种方法,用于将炔基-(Gd( III )-DOTA)部分同时多重偶联至具有叠氮化物残基结构域的PNA低聚物。低聚物组装完成后,这是通过单个Huisgen型铜催化的叠氮化物炔烃环加成(CuAAC)反应实现的。标记的PNA和核糖腺苷酸[(Gd( III )-DOTA) 4 –PNA] 2 :poly(rA),在相同浓度的Gd 3 +

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