磁共振成像
激进的
氧化还原
细胞内
生物物理学
体内
材料科学
谷胱甘肽
生物相容性
细胞凋亡
纳米技术
化学
有机化学
生物
医学
酶
生物化学
放射科
生物技术
作者
Jian Chen,Xiaobo Wang,Ying Zhang,Shouren Zhang,Huili Liu,Jinxiang Zhang,Feng Han,Bo Li,Xinyu Wu,Yongju Gao,Baocheng Yang
出处
期刊:Biomaterials
[Elsevier]
日期:2021-01-01
卷期号:266: 120457-120457
被引量:84
标识
DOI:10.1016/j.biomaterials.2020.120457
摘要
Current chemodynamic therapy (CDT) has been restricted by the requirement of strongly acidic conditions, insufficient endogenous H2O2 and upregulated cellular antioxidant defense. To overcome these obstacles, the carrier-free Fe(III)-ART nanoparticle is developed via coordination driven self-assembly of Fe3+ and hydrolyzed ART and evaluated as a redox-triggered C-centered free radicals nanogenerator for self-enhanced magnetic resonance imaging and chemodynamic therapy. The carrier-free Fe(III)-ART NPs can be triggered by intracellular GSH to release ART and Fe3+, which is further reduced to Fe2+ that catalyzed the endoperoxide of ART to generate C-centered free radicals. Notably, unlike current CDT, such a free radical generation process is without reliance on pH or endogenous H2O2. Meanwhile, the concurrent GSH depletion can diminish the antioxidation of tumors and enhance CDT. The C-centered free radicals-mediated apoptosis and GSH depletion-induced ferrotosis act in synergy, leading to potent tumor growth inhibition and superior anticancer efficacy in vitro and in vivo. Moreover, Fe(III)-ART NPs exhibit redox-triggered T2 relaxivity and contribute to activatable MRI-guided CDT. The development of biodegradable Fe(III)-ART NPs with superior anticancer efficacy, favorable pharmacokinetics and good biocompatibility provides a promising strategy to break through the bottlenecks of traditional CDT and greatly promotes the development of next-generation cancer theranostics.
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