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Traditional anticancer treatments fail to significantly improve prognoses, and exploration of novel promising therapeutic modalities is urgently needed. In this study, multifunctional mesoporous polydopamine nanoparticles (Pt@MPDA/GOx/Fe3+ NPs) loaded with glucose oxidase (GOx), Fe ions and ultrasmall Pt nanoparticles (NPs) were prepared for magnetic resonance imaging (MRI)-guided photothermal therapy (PTT)-enhanced chemodynamic therapy (CDT). The oxidation of intratumoral glucose to H2O2 and GOx induced an H2O2-rich microenvironment, and then elevated H2O2 was catalyzed into highly cytotoxic ·OH by Fe3+ via a Fenton reaction for CDT to induce cancer cell death efficiently. Notably, the heat generated by MPDA NPs under laser irradiation offered a moderate PTT to cascade the CDT effect. Moreover, Pt NPs can oxidize H2O2 to yield O2, which in turn accelerates the catalytic process of GOx to increase the efficiency of CDT. Meanwhile, in the high oxidation environment of tumor cells, Pt NPs are oxidized into Pt2+ to achieve a tumor chemotherapy effect. In addition, chelated Fe3+ endows the system with an MRI-visible function to monitor the treatment efficacy. In conclusion, this study provides a novel MRI-guided PTT-enhanced CDT synergistic nanomedicine platform for cancer therapy.


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Biomimetic mesoporous polydopamine nanoparticles for MRI-guided photothermal-enhanced synergistic cascade chemodynamic cancer therapy

Show Author's information Nannan Zhang1,§Gaofeng Shu1,§Lin Shen1Jiayi Ding1Enqi Qiao1Shiji Fang1Jingjing Song1Yang Yang1Zhongwei Zhao1Chenying Lu1Jianfei Tu1Min Xu1Yongzhong Du2( )Minjiang Chen1( )Jiansong Ji1( )
Key Laboratory of Imaging Diagnosis and Minimally Invasive Interventional Research of Zhejiang Province, School of Medicine, Lishui Hospital of Zhejiaing University, Lishui 323000, China
Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China

§ Nannan Zhang and Gaofeng Shu contributed equally to this work.

Abstract

Traditional anticancer treatments fail to significantly improve prognoses, and exploration of novel promising therapeutic modalities is urgently needed. In this study, multifunctional mesoporous polydopamine nanoparticles (Pt@MPDA/GOx/Fe3+ NPs) loaded with glucose oxidase (GOx), Fe ions and ultrasmall Pt nanoparticles (NPs) were prepared for magnetic resonance imaging (MRI)-guided photothermal therapy (PTT)-enhanced chemodynamic therapy (CDT). The oxidation of intratumoral glucose to H2O2 and GOx induced an H2O2-rich microenvironment, and then elevated H2O2 was catalyzed into highly cytotoxic ·OH by Fe3+ via a Fenton reaction for CDT to induce cancer cell death efficiently. Notably, the heat generated by MPDA NPs under laser irradiation offered a moderate PTT to cascade the CDT effect. Moreover, Pt NPs can oxidize H2O2 to yield O2, which in turn accelerates the catalytic process of GOx to increase the efficiency of CDT. Meanwhile, in the high oxidation environment of tumor cells, Pt NPs are oxidized into Pt2+ to achieve a tumor chemotherapy effect. In addition, chelated Fe3+ endows the system with an MRI-visible function to monitor the treatment efficacy. In conclusion, this study provides a novel MRI-guided PTT-enhanced CDT synergistic nanomedicine platform for cancer therapy.

Keywords: chemodynamic therapy, glucose oxidase, Fenton reaction, mesoporous polydopamine, synergistic efficacy

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Publication history
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Acknowledgements

Publication history

Received: 18 November 2021
Revised: 13 January 2022
Accepted: 15 January 2022
Published: 21 March 2022
Issue date: April 2022

Copyright

© Tsinghua University Press 2022

Acknowledgements

The study was supported in part by the National Key Research and Development Projects Intergovernmental Cooperation in Science and Technology of China (No. 2018YFE0126900), the National Natural Science Foundation of China (Nos. 82072026, 81901852, and 81901848), the National Natural Science Foundation of Zhejiang Province (Nos. LQ21H180003 and LY21H160010), the Medical and Health Science and Technology Plan Project of Zhejiang Province (Nos. 2021KY414 and 2020RC042), and the Key R&D Program of Lishui City (No. 2021ZDYF12).

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