A Dual-FRET-Based Versatile Prodrug for Real-Time Drug Release Monitoring and In Situ Therapeutic Efficacy Evaluation
作者:Shi-Ying Li、Li-Han Liu、Lei Rong、Wen-Xiu Qiu、Hui-Zhen Jia、Bin Li、Fei Li、Xian-Zheng Zhang
DOI:10.1002/adfm.201503262
日期:2015.12
DOX release of the V‐prodrug can be real‐time monitored by the increase of the red fluorescence from DOX. Thereafter, DOX‐induced cell apoptosis can also be in situ assessed by the fluorescence recovery of the FAM, due to the caspase‐3‐mediated Asp‐Glu‐Val‐Asp (DEVD) peptide sequence cleavage. This novel prodrug provides a cascaded imaging of real‐time drug release and subsequent cell apoptosis, which
基于双福斯特共振能量转移(FRET)的通用前药(V-prodrug),其中5(6)-羧基荧光素(FAM)和阿霉素(DOX)的荧光都可以被4-(二甲基氨基偶氮)苯淬灭本文开发了具有高淬灭效率的-4-羧酸(Dabcyl)。V形前药可选择性结合α v β 3整联蛋白通过Arg-Gly-Asp(RGD)靶向部分过度表达癌细胞。之后,可以通过DOX发出的红色荧光的增加来实时监测V前药的酸介导的DOX释放。此后,由于caspase-3介导的Asp-Glu-Val-Asp(DEVD)肽序列的裂解,也可以通过FAM的荧光恢复来原位评估DOX诱导的细胞凋亡。这种新颖的前药提供了实时药物释放和随后的细胞凋亡的级联成像,从而能够原位检测癌症反应并评估前药的疗效。