The tumor microenvironment (TME) has been increasingly recognized as a crucial contributor to tumorigenesis. Based on the unique TME for achieving tumor‐specific therapy, here a novel concept of photothermal‐enhanced sequential nanocatalytic therapy in both NIR‐I and NIR‐II biowindows is proposed, which innovatively changes the condition of nanocatalytic Fenton reaction for production of highly efficient hydroxyl radicals (•OH) and consequently suppressing the tumor growth. Evidence suggests that glucose plays a vital role in powering cancer progression. Encouraged by the oxidation of glucose to gluconic acid and H2O2 by glucose oxidase (GOD), an Fe3O4/GOD‐functionalized polypyrrole (PPy)‐based composite nanocatalyst is constructed to achieve diagnostic imaging‐guided, photothermal‐enhanced, and TME‐specific sequential nanocatalytic tumor therapy. The consumption of intratumoral glucose by GOD leads to the in situ elevation of the H2O2 level, and the integrated Fe3O4 component then catalyzes H2O2 into highly toxic •OH to efficiently induce cancer‐cell death. Importantly, the high photothermal‐conversion efficiency (66.4% in NIR‐II biowindow) of the PPy component elevates the local tumor temperature in both NIR‐I and NIR‐II biowindows to substaintially accelerate and improve the nanocatalytic disproportionation degree of H2O2 for enhancing the nanocatalytic‐therapeutic efficacy, which successfully achieves a remarkable synergistic anticancer outcome with minimal side effects.
Nanocatalysts‐Augmented and Photothermal‐Enhanced Tumor‐Specific Sequential Nanocatalytic Therapy in Both NIR‐I and NIR‐II Biowindows
Wei Feng,Xiuguo Han,Rongyan Wang,Xiang Gao,Ping Hu,Wenwen Yue,Yu Chen,Jianlin Shi
Published 2018 in Advances in Materials
ABSTRACT
PUBLICATION RECORD
- Publication year
2018
- Venue
Advances in Materials
- Publication date
2018-12-09
- Fields of study
Medicine, Materials Science, Chemistry, Engineering
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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