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Programmed degradation of a hierarchical nanoparticle with redox and light responsivity for self-activated photo-chemical enhanced chemodynamic therapy.

Abstract：

:Chemodynamic therapy (CDT) has recently emerged as a promising treatment for cancer due to the high specificity of CDT towards tumor microenvironment (TME). However, the low efficiency of reactive oxygen species (ROS) generation and the robust ROS defensive mechanisms in cancer cells remain critical hurdles for current CDT. Addressing both challenges in a single platform, we developed a novel redox and light-responsive (RLR) nanoparticle with a core-shell structure. Remarkably, our hierarchical RLR nanoparticle is composed of an ultrasmall Fe3O4 nanoparticle engineered framework of hollow carbon matrix core and a nanoflower-like MnO2 shell. Under the abundant overexpressed glutathione (GSH) and acidic nature in TME, the RLR nanoparticle was programmed to degrade and self-activate CDT-induced cancer-killing by accelerating ROS generation via overcoming the ROS defensive mechanisms based on the depletion of intracellular GSH, the sequential production of theranostic ion species (e.g., Mn2+ and Fe2+), a spatiotemporal controllable photothermal hyperthermia and a redox triggered chemotherapeutic drug release. Additionally, the carbon framework of RLR nanoparticle could collapse by leaching of iron ions. An excellent selective and near-complete tumor suppression based on the RLR nanoparticles through a strong synergy between CDT, PTT and anti-cancer drugs was demonstrated via in vitro and in vivo anti-tumoral assays.

journal_name

Biomaterials

journal_title

Biomaterials

authors

Wang S,Yang L,Cho HY,Dean Chueng ST,Zhang H,Zhang Q,Lee KB

doi

10.1016/j.biomaterials.2019.119498

subject

Has Abstract

pub_date

2019-12-01 00:00:00

pages

119498

eissn

0142-9612

issn

1878-5905

pii

S0142-9612(19)30597-6

journal_volume

224

pub_type

杂志文章

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