Jiang Wenjing, Mo Fan, Lin Yaohui, Wang Xusheng, Xu LiangJun, Fu FengFu
Key Laboratory for Analytical Science of Food Safety and Biology of MOE, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China.
J Mater Chem B. 2018 Jul 14;6(26):4360-4367. doi: 10.1039/c8tb00670a. Epub 2018 Jun 21.
In this research, a novel tumor targeting dual stimuli responsive nanoplatform was fabricated for the controllable delivery and release of a drug to realize chemo-photothermal synergetic cancer therapy by integrating a DNA aptamer with polydopamine reduced graphene oxide (rGO-PDA) nanosheets. The rGO-PDA nanosheets simultaneously acted as a near-infrared radiation (NIR) photothermal agent to generate hyperthermia for photothermal therapy and a nano-carrier for loading doxorubicin (DOX), and the specially designed DNA aptamer served as a supplementary carrier for DOX loading as well as targeting moiety/gatekeeper for specific cellular recognition and controllable release of DOX. The proposed nanoplatform possessed a good targeting ability, remarkable photothermal conversion ability and intelligent drug release with both pH and photothermal heating dual stimuli response. The nanoplatform was successfully used to selectively deliver DOX to protein tyrosine kinase 7 over-expressing cancer cells with a loading capacity of 1.56 mg mg and controllable drug release, which responded to both acidic intracellular environments and NIR irradiation. The combination of the dual stimuli responsive controllable release and the dual nanocarrier for drug loading results in efficient chemo-photothermal synergetic therapy and holds great potential for multimodal cancer therapy.
在本研究中,通过将DNA适配体与聚多巴胺还原氧化石墨烯(rGO-PDA)纳米片相结合,构建了一种新型的肿瘤靶向双刺激响应纳米平台,用于药物的可控递送和释放,以实现化疗-光热协同癌症治疗。rGO-PDA纳米片同时作为近红外辐射(NIR)光热剂产生用于光热治疗的热疗,以及用于负载阿霉素(DOX)的纳米载体,而特别设计的DNA适配体作为DOX负载的补充载体以及用于特定细胞识别和DOX可控释放的靶向部分/守门人。所提出的纳米平台具有良好的靶向能力、显著的光热转换能力以及对pH和光热加热双刺激响应的智能药物释放。该纳米平台成功用于将DOX选择性递送至过表达蛋白酪氨酸激酶7的癌细胞,负载量为1.56 mg/mg且药物释放可控,其对酸性细胞内环境和NIR照射均有响应。双刺激响应可控释放与用于药物负载的双纳米载体的结合导致了高效的化疗-光热协同治疗,并在多模态癌症治疗中具有巨大潜力。
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