Volume 135, Issue 36 e202306803
Forschungsartikel

A Targeting Singlet Oxygen Battery for Multidrug-Resistant Bacterial Deep-Tissue Infections

Yiwen Zhu

Yiwen Zhu

State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029 China

These authors contributed equally to this work.

Contribution: Methodology (equal), Software (equal), Writing - original draft (lead)

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Minzheng Gao

Minzheng Gao

State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029 China

These authors contributed equally to this work.

Contribution: Methodology (equal), Software (equal), Writing - original draft (equal)

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Mengrui Su

Mengrui Su

State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029 China

Contribution: Methodology (equal)

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Yanzhe Shen

Yanzhe Shen

State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029 China

Contribution: Methodology (supporting)

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Kai Zhang

Kai Zhang

State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029 China

Contribution: Data curation (lead)

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Bingran Yu

Corresponding Author

Bingran Yu

State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029 China

Contribution: Conceptualization (lead), Funding acquisition (equal), Writing - review & editing (lead)

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Fu-Jian Xu

Corresponding Author

Fu-Jian Xu

State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029 China

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First published: 17 July 2023

Abstract

Traditional photodynamic therapy (PDT) is dependent on externally applied light and oxygen, and the depth of penetration of these factors can be insufficient for the treatment of deep infections. The short half-life and short diffusion distance of reactive oxygen species (ROS) also limit the antibacterial efficiency of PDT. Herein, we designed a targeting singlet oxygen delivery system, CARG-Py, for irradiation-free and oxygen-free PDT. This system was converted to the “singlet oxygen battery” CARG-1O2 and released singlet oxygen without external irradiation or oxygen. CARG-1O2 is composed of pyridones coupled to a targeting peptide that improves the utilization of singlet oxygen in deep multidrug-resistant bacterial infections. CARG-1O2 was shown to damage DNA, protein, and membranes by increasing the level of reactive oxygen inside bacteria; the attacking of multiple biomolecular sites caused the death of methicillin-resistant Staphylococcus aureus (MRSA). An in vivo study in a MRSA-infected mouse model of pneumonia demonstrated the potential of CARG-1O2 for the efficient treatment of deep infections. This work provides a new strategy to improve traditional PDT for irradiation- and oxygen-free treatment of deep infections while improving convenience of PDT.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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