Cyclen-based chelates can be used as contrast agents for multi-modal imaging of tissue cells. The cyclen-based chelates are preferably polyazamacrocyclic molecules formed from 1,4,7,10 tetraazacyclododecane (“cyclen”) having varying chelating ions, phosphoester chains, and light harvesting moieties. By changing the chelating ion, phosphoester chain length and/or the light harvesting moiety different imaging techniques, such as MRI, CT, fluorescence and absorption, x-ray and NIR, may be employed to image the tissue cells. Additionally, the cyclen-based chelates may be conjugated to provide for site-specific delivery of the cyclen-based chelate to the desired tissue cells. The cyclen-based chelates may also be delivered to the tissue cells by attaching the cyclen-based chelates to a polymeric delivery vehicle. Although these cyclen-based chelates have a wide variety of application, the preferred use is for imaging of cancer cells, such as brain cancer, for improving resection of a cancerous tissue.
基于环状四胺(“cyclen”)形成的聚合物配位剂可用作多模成像组织细胞的对比剂。这些基于cyclen的配位剂通常是由具有不同配位离子、
磷酸酯链和光收集基团的聚合物分子形成的。通过改变配位离子、
磷酸酯链长度和/或光收集基团,可以使用不同的成像技术,如MRI、CT、荧光和吸收、X射线和NIR等来成像组织细胞。此外,这些基于cyclen的配位剂可以被结合以提供针对所需组织细胞的特定部位递送。这些基于cyclen的配位剂也可以通过将其附着到聚合物递送载体上来递送到组织细胞。尽管这些基于cyclen的配位剂具有广泛的应用,但首选用于癌细胞的成像,如脑癌,以改善癌组织的切除。