Volume 20, Issue 43 2404741
Research Article

Oral Heterojunction Coupling Interventional Optical Fiber Mediates Synergistic Therapy for Orthotopic Rectal Cancer

Ruiyan Li

Ruiyan Li

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Dianxun Fu

Dianxun Fu

Department of Radiology, Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, 300052 China

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Xue Yuan

Xue Yuan

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Gaoli Niu

Gaoli Niu

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Yueyue Fan

Yueyue Fan

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Jiacheng Shi

Jiacheng Shi

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Yiwen Yang

Yiwen Yang

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Jiamin Ye

Jiamin Ye

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Jingwen Han

Jingwen Han

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Yong Kang

Yong Kang

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

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Xiaoyuan Ji

Corresponding Author

Xiaoyuan Ji

Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072 China

Medical College, Linyi University, Linyi, 276000 China

E-mail: [email protected]

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First published: 20 June 2024
Citations: 5

Abstract

Catalytic therapy has shown great potential for clinical application. However, conventional catalytic therapies rely on reactive oxygen species (ROS) as “therapeutic drugs,” which have limitations in effectively inhibiting tumor recurrence and metastasis. Here, a biomimetic heterojunction catalyst is developed that can actively target orthotopic rectal cancer after oral administration. The heterojunction catalyst is composed of quatrefoil star-shaped BiVO4 (BVO) and ZnIn2S4 (ZIS) nanosheets through an in situ direct growth technique. Poly-norepinephrine and macrophage membrane coatings afford the biomimetic heterojunction catalyst (BVO/ZIS@M), which has high rectal cancer targeting and retention abilities. The coupled optical fiber intervention technology activates the multicenter coordination of five catalytic reactions of heterojunction catalysts, including two reduction reactions (O2→·O2 and CO2→CO) and three oxidation reactions (H2O→·OH, GSH→GSSG, and LA→PA). These catalytic reactions not only induce immunogenic death in tumor cells through the efficient generation of ROS/CO and the consumption of GSH but also specifically lead to the use of lactic acid (LA) as an electron donor to improve catalytic activity and disrupt the LA-mediated immunosuppressive microenvironment, mediating synergistic catalysis and immunotherapy for orthotopic rectal cancer. Therefore, this optical fiber intervention triggered the combination of heterojunction catalytic therapy and immunotherapy, which exhibits prominent antitumor effects.

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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