[EN] MANGANESE-BASED MAGNETIC RESONANCE CONTRAST AGENTS<br/>[FR] AGENTS DE CONTRASTE POUR RÉSONANCE MAGNÉTIQUE À BASE DE MANGANÈSE
申请人:GEN HOSPITAL CORP
公开号:WO2014107722A1
公开(公告)日:2014-07-10
Manganese coordination complexes with utility as magnetic resonance probes and as biological reductant sensors are disclosed. In one embodiment, ligands can stabilize both the Mn2+ and Mn3+ oxidation states. In the presence of a reductant such as glutathione, low relaxivity MnIII-HBET is rapidly converted to high relaxivity MnII-HBET with a 3-fold increase in relaxivity, and concomitant increase in magnetic resonance signal. In another embodiment, ligands were designed to chelate Mn(ll) in a thermodynamically stable and kinetically inert fashion while allowing for direct interaction of Mn(ll) with water. In yet another embodiment, high molecular weight multimers containing six Mn(ll) chelators were prepared. The high molecular weight results in slower tumbling of the molecules in solution and can strongly enhance the Mn(ll) relaxivity.
锰配位络合物具有作为磁共振探针和生物还原剂传感器的实用性。在一个实施例中,配体可以稳定Mn2+和Mn3+的氧化态。在存在谷胱甘肽等还原剂的情况下,低弛豫率的MnIII-HBET会迅速转化为高弛豫率的MnII-HBET,其弛豫率增加了3倍,并伴随着磁共振信号的增加。在另一个实施例中,设计了配体以热力学稳定和动力学惰性的方式螯合Mn(ll),同时允许Mn(ll)与水直接相互作用。在另一个实施例中,制备了含有六个Mn(ll)螯合剂的高分子量多聚体。高分子量导致溶液中分子的翻滚速度较慢,并且可以强烈增强Mn(ll)的弛豫率。