Next-generation photodynamic therapy agents based upon the conjugation of multiple photosensitizers to a targeting backbone will allow for more efficacious light-based therapies. To this end, we have developed glucose-modified chlorins and bacteriochlorins featuring a reactive carboxylic acid linker for conjugation to targeting moieties. The photosensitizers were synthesized in relatively high yields from meso-tetra(p-aminophenyl)porphyrin, and resulted in neutral, hydrophilic chromophores with superb absorption profiles in the far-red and near-infrared portions of the electromagnetic spectrum. In addition, conjugation of these photosensitizers to a model nanoscaffold (crosslinked dextran-coated nanoparticles) demonstrated that the inclusion of hydrophilic sugar moieties increased the number of dyes that can be loaded while maintaining suspension stability. The described compounds are expected to be particularly useful in the synthesis of a number of targeted nanotherapeutic systems.
基于将多种光敏剂与靶向骨架共轭的下一代光动力疗法制剂将使基于光的疗法更加有效。为此,我们开发了
葡萄糖修饰的
氯素和细菌
氯素,它们具有活性
羧酸连接体,可与靶向分子连接。这些光敏剂是由中-四(对
氨基
苯基)
卟啉以相对较高的产率合成的,并产生了中性亲
水性发色团,在电磁波谱的远红外和近红外部分具有极好的吸收曲线。此外,将这些光敏剂与模型纳米支架(交联
葡聚糖涂层纳米粒子)共轭的结果表明,亲
水性糖分子的加入增加了可负载的
染料数量,同时保持了悬浮稳定性。所描述的化合物有望在合成一些靶向纳米治疗系统中发挥特别的作用。