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Functionalized DNA Enables Programming Exosomes/Vesicles for Tumor Imaging and Therapy.
Small ( IF 13.0 ) Pub Date : 2019-10-15 , DOI: 10.1002/smll.201903761
Zhijin Fan 1 , Keng Xiao 1 , Jingyan Lin 1 , Yuhui Liao 1 , Xi Huang 1
Affiliation  

Exosomes serve as significant information carriers that regulate important physiological and pathological processes. Herein, functionalized DNA is engineered to be a hinge that anchors quantum dots (QDs) onto the surface of exosomes, realizing a moderate and biocompatible labeling strategy. The QDs-labeled exosomes (exosome-DNA-QDs complex) can be swiftly engulfed by tumor cells, indicating that exosome-DNA-QDs can be applied as a specific agent for tumor labeling. Furthermore, the engineered artificial vesicles of M1 macrophages (M1mv) are constructed via a pneumatic liposome extruder. The results reveal that the individual M1mv can kill tumor cells and realize desirable biological treatment. To reinforce the antitumor efficacy of M1mv and the specificity of drug release, a target-triggered drug delivery system is constructed to realize a specific microRNA-responded delivery system for visual therapy of tumors. These strategies facilitate moderate labeling and functionalization of exosomes/vesicles and construct artificial drug-delivery vesicles that simultaneously possess biological treatment and chemotherapy functions, and thus have the potential to serve as a new paradigm for tumor labeling and therapy.

中文翻译:

功能化的DNA可以为肿瘤成像和治疗编程外泌体/囊泡。

外泌体是重要的信息载体,可调节重要的生理和病理过程。在此,将功能化的DNA工程化为铰链,将量子点(QD)锚定在外泌体表面上,从而实现了适度且生物相容的标记策略。QDs标记的外泌体(外泌体-DNA-QDs复合物)可以被肿瘤细胞迅速吞噬,这表明外泌体-DNA-QDs可以用作肿瘤标记的特异性试剂。此外,通过气动脂质体挤出机构建了工程化的M1巨噬细胞(M1mv)人工囊泡。结果表明,单独的M1mv可以杀死肿瘤细胞并实现理想的生物学治疗。为了增强M1mv的抗肿瘤功效和药物释放的特异性,构建目标触发的药物递送系统,以实现用于肿瘤视觉治疗的特定microRNA响应的递送系统。这些策略促进了外泌体/囊泡的适度标记和功能化,并构建了同时具有生物治疗和化学治疗功能的人工药物输送囊泡,因此有可能成为肿瘤标记和治疗的新范例。
更新日期:2019-11-20
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