| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| In-situ Oxygen-producing Nanoreactor Incorporating Photothermal Effect with Catalase-like Catalysis Potentiates Photodynamic Therapy of Hypoxic Tumor |
| GUO Min1, DANG Yuan1, MA Junping1, XU Huining2,*, ZHOU Yuanzhen1,3, YU Sha1,*
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1 School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China 2 Shaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China 3 Shaanxi Provincial University Engineering Research Center of Low-Carbon Energy Efficient Utilization, Xi’an 710055, China |
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Abstract The emerging photodynamic therapy (PDT) is considered to be a promising approach for tumor therapy due to its low systemic toxicity, minor trauma and high therapeutic efficiency. However, the hypoxic environment in tumor tissue severely limits the PDT efficiency. Herein, we developed a hyaluronic acid (HA)-coated nanoreactor (Bi2Se3/ZnPc/Pt@HA, BZPs) based on in situ “oxygen-producing” strategy by integrating the photosensitizer (zinc phthalocyanine, ZnPc) and platinum nanoparticles (Pt NPs) with catalase-like activity on the bismuth-based nanoparticles (Bi2Se3 NPs) with porous structure and photothermal property for synergistically enhancing the PDT efficiency. When the nanoreactor specifically internalized into tumor cells, the HA is degraded by hyaluronidase to expose Bi2Se3/ZnPc/Pt, which can catalyze the decomposition of excess endogenous hydrogen peroxide (H2O2) into oxygen (O2) by using Pt NPs, thus alleviating hypoxia and enhancing the ZnPc-induced PDT efficiency. Meanwhile, the Bi2Se3 can produce hyperpyrexia for photothermal therapy (PTT) and accelerate intracellular ROS production and diffusion, thus significantly improving the PDT efficiency. The cell viability assay and live/dead staining results demonstrate that the nanoreactor has prominent inhibition efficiency for tumor cells. Therefore, the proposed nanoreactor can effectively alleviate hypoxia and enhance the PDT efficiency, which may provide a new avenue for exploring the novel PDT enhancement systems.
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Published:
Online: 2026-04-16
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