Self-Reporting and Splitting Nanopomegranates Potentiate Deep Tissue Cancer Radiotherapy via Elevated Diffusion and Transcytosis
Self-Reporting and Splitting Nanopomegranates Potentiate Deep Tissue Cancer Radiotherapy via Elevated Diffusion and Transcytosis
复制标题
自我报告和分裂纳米石榴通过增强扩散和转胞吞作用增强深部组织癌症放射治疗
DOI：
10.1021/acsnano.0c02674
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发表时间：
2020
期刊：
影响因子：
17.1
通讯作者：
Liu Hang
中科院分区：
文献类型：
--
作者：
Wang Li;Jiang Wei;Xiao Liang;Li Hongjun;Chen Ziqi;Liu Yi;Dou Jiaxiang;Li Shuya;Wang Qin;Han Wei;Wang Yucai;Liu Hang
The efficacy of nanoradiosensitizers in cancer therapy has been primarily impeded by their limited accessibility to radioresistant cancer cells residing deep inside tumor tissues. The failure to report tumor response to radiotherapy generally delays adjustment of the treatment schedule and sets up another substantial obstacle to clinical success. Here, we develop a nanopomegranate (RNP) platform that not only visualizes the cancer radiosensitivities but also potentiates deep tissue cancer radiotherapy via elevated passive diffusion and active transcytosis. The RNPs are engineered through the programmed self-assembly of a tumor environment-targeting polymeric matrix and modular building blocks of ultrasmall gold nanoparticles (Au5). Once RNPs reach the tumors, the environmental acidity triggers the splitting and surface cationization of Au5. The small dimension of Au5allows its passive diffusion, while positive surface charge enables its active transcytosis to cross the tumor interstitium. Meanwhile, the reporter element monitors the feedback of favorable radiotherapy responsiveness by detecting the activated apoptosis after radiation. The pivotal role of RNPs in improving and identifying radiotherapeutic outcomes is demonstrated in various tumor bearing mouse models with different radiosensitivities. In summary, our strategy offers a promising paradigm for deep tissue drug delivery as well as individualized precision radiotherapy.
