The concept and examples of type-III photosensitizers for cancer photodynamic therapy
作者:Qichao Yao、Jiangli Fan、Saran Long、Xueze Zhao、Haidong Li、Jianjun Du、Kun Shao、Xiaojun Peng
DOI:10.1016/j.chempr.2021.10.006
日期:2022.1
In conventional photodynamic therapy (PDT), reactive oxygen species are produced to kill cancer cells based on type-I and type-II mechanisms, and the sensitization of photosensitizers is oxygen dependent. However, solid tumors reside in a hypoxic milieu, which hampers the therapeutic efficacy of photosensitive drugs against tumors. Novel photosensitizers NBEX (X = S, Se, Te) were designed to bind to
在传统的光动力疗法 (PDT) 中,基于 I 型和 II 型机制产生活性氧来杀死癌细胞,并且光敏剂的敏化是氧依赖性的。然而,实体瘤存在于缺氧环境中,这阻碍了光敏药物对肿瘤的治疗效果。新型光敏剂NBEX ( X = S、Se、Te ) 旨在与 RNA 结合而不受其他物种的干扰,并直接转移激发态能量以破坏癌细胞中的 RNA。这种杀死癌细胞的过程完全独立于氧气(III型机制)。值得注意的是,NBEX ( X= S , Se , Te ) 可以自组装成纳米颗粒并在体内数十分钟内积聚在肿瘤区域。NBESe在杀死实体瘤和抑制肿瘤转移方面表现出优异的性能。同时,PDT可以诱导对肿瘤的免疫反应。这种新型光敏剂可能是临床实践中癌症治疗的候选者。