压电
声动力疗法
材料科学
电场
活性氧
纳米颗粒
纳米技术
生物医学工程
化学
医学
复合材料
生物化学
物理
量子力学
作者
Lihan Cai,Jianjun Du,Fuping Han,Tiancong Shi,Han Zhang,Lu Yang,Saran Long,Wen Sun,Jiangli Fan,Xiaojun Peng
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-04-13
卷期号:17 (8): 7901-7910
被引量:45
标识
DOI:10.1021/acsnano.3c01856
摘要
The regulation of electrostatic electric fields through electrical stimulation is an efficient method to increase the catalytic activity of nanozymes and improve the therapeutic effect of nanozyme catalytic therapy. Piezoelectric materials, which are capable of generating a built-in electric field under ultrasound (US), not only improve the activity of nanozymes but also enable piezoelectric sonodynamic therapy (SDT). In this study, a sonosensitizer based on a Hf-based metal–organic framework (UIO-66) and Au nanoparticles (NPs) was produced. Under US irradiation, UIO-66 can generate a built-in electric field inside the materials, which promotes electron–hole separation and produces reactive oxygen species (ROS). The introduction of Au NPs facilitated the electron transfer, which inhibited the recombination of the electron–hole pairs and improved the piezoelectric properties of UIO-66. The value of the piezoelectric constant (d33) increased from 71 to 122 pmV–1 after the deposition of Au NPs. In addition, the intrinsic catalase and peroxidase activities of the Au NPs were increased 2-fold after the stimulation from the built-in electric field induced through US exposure. In vivo and in vitro experiments revealed that the proposed sonosensitizer can kill cancer cells and inhibit tumor growth in mice through the enhanced piezoelectric SDT and nanozyme catalytic therapy. The piezoelectric sensitizer proposed in this work proved to be an efficient candidate that can be used for multiple therapeutic modalities in tumor therapy.
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