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- W3169301246 abstract "Photodynamic therapy (PDT) has provided a promising approach for the treatment of solid tumors, while the therapeutic efficacy is often limited due to the hypoxic tumor microenvironment, resulting in tumor metastasis. Herein, we report an oxygen-producing proenzyme hydrogel (OPeH) with photoactivatable enzymatic activity for PDT enabled metastasis-inhibiting combinational therapy of breast cancer. This OPeH based on alginate is composed of protoporphyrin IX (PpIX) conjugated manganese oxide (MnO2) nanoparticles, which act as both the photosensitizer and oxygen-producing agent, and singlet oxygen (1O2)-responsive proenzyme nanoparticles. In the hypoxic and acidic tumor microenvironment, MnO2 can generate 1O2 to promote PpIX-mediated PDT with an amplified 1O2 generation efficiency, which also triggers the cleavage of 1O2-responsive linkers and cascade activation of proenzymes for cancer cell death. This combinational therapy upon photoactivation not only greatly inhibited the tumor growth, but also suppressed lung metastasis in a mouse xenograft breast tumor model, which is impossible in the case of PDT alone. This study thus provides a proenzyme hydrogel platform with photoactivatable activity for metastasis-inhibiting cancer therapy with high efficacy and safety." @default.
- W3169301246 created "2021-06-22" @default.
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- W3169301246 date "2021-01-01" @default.
- W3169301246 modified "2023-09-27" @default.
- W3169301246 title "Oxygen-producing proenzyme hydrogels for photodynamic-mediated metastasis-inhibiting combinational therapy" @default.
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- W3169301246 doi "https://doi.org/10.1039/d1tb01009c" @default.
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