AlEgen-Based Bionic Nanozymes for the Interventional Photodynamic Therapy-Based Treatment of Orthotopic Colon Cancer

作者：Duo, Yanhong^*; Suo, Meng; Zhu, Daoming; Li, Zihuang^*; Zheng, Zheng^*; Tang, Ben Zhong^*

来源：ACS applied materials & interfaces, 2022, 14(23): 26394-26403.

DOI：10.1021/acsami.2c04210

• aggregation-induced emission
• interventional photodynamic therapy
• platelet-mimicking MnO2 nanozyme
• tumor targeting
• orthotopic colon cancer

Relative to traditional photosensitizer (PS) agents, those that exhibit aggregation-induced emission (AIE) properties offer key advantages in the context of photodynamic therapy (PDT). At present, PDT efficacy is markedly constrained by the hypoxic microenvironment within tumors and the limited depth to which lasers can penetrate in a therapeutic context. Herein, we developed platelet-mimicking MnO2 nanozyme/AlEgen composites (PMD) for use in the interventional PDT treatment of hypoxic tumors. The resultant biomimetic nanopartides (NPs exhibited excellent stability and were able to efficiently target tumors. Moreover, they were able to generate O-2 within the tumor microenvironment owing to their catalase-like activity. Notably, throe, an interventional approach in which an optical fiber was introduced into the abdominal cavity of mice harboring orthotopic colon tumors, good PDT efficacy was achieved. We thus propose that a novel strategy consisting of a combination of an AlEgen-based bionic nanozyme and a biomimetic cell membrane coating represents an ideal therapeutic platform for targeted antitumor PDT. This study is the first to have combined interventional therapy and AIEgen-based PDT, thereby overcoming the limited light penetration that typically constrains the therapeutic efficacy of this technique, highlighting a promising new AIEgen-based PDT treatment strategy.

• 单位
  北京大学; 武汉大学; 1