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Schematic diagram of the preparation and treatment principle of OPeH. (A) Schematic diagram of the preparation of OPeH. (B) Mechanism of oxygen production and NIR photoactivation of OPeH. OPeH integrates PDT and NIR light-activated enzymes to achieve the combined therapeutic effect of inhibiting tumor growth and lung metastasis. Reproduced with permission from (Liu N. et al., 2021).
