Catalase-based liposomal for reversing immunosuppressive tumor microenvironment and enhanced cancer chemo-photodynamic therapy.

Abstract

Photodynamic therapy (PDT) and chemotherapy has been applied as a prospective approach in tumor therapeutics. However, suffering from the inherent hypoxia status in tumor microenvironment (TME), the anticancer efficiency is enormously restricted, especially PDT. Herein, we develop a unique liposomal encapsulated catalase (CAT), lyso-targeted NIR photosensitizer (MBDP) and doxorubicin (Dox), forming FA-L@MD@CAT, to increase tumor oxygenation by catalyzing intratumoral high-expressed H2O2 for enhancing the combination of chemo-PDT. Moreover, the enhanced tumoral oxygenation not only facilitates singlet oxygen (1O2) production but also reverses immunosuppressive TME by modulating immune cytokines to favor antitumor immunities, which significantly induce tumor death. Notably, this system also realizes specific tumor recognition to folate receptor upregulated tumors and improves intratumoral accumulation. This work provides an effective strategy to promote tumor therapeutic index, which may possess a promising future in clinical application.

• Authors: Chao Shi, Mingle Li, Zhen Zhang, Qichao Yao, Kun Shao, Feng Xu, Ning Xu, Haidong Li, Jiangli Fan, Wen Sun, Jianjun Du, Saran Long, Jingyun Wang, Xiaojun Peng
• Journal: Biomaterials (Biomaterials) Vol. 233 Pg. 119755 (03 2020) ISSN: 1878-5905 [Electronic] Netherlands
• PMID: 31927233 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2020 Elsevier Ltd. All rights reserved.

Chemical References

• Photosensitizing Agents
• Hydrogen Peroxide
• Catalase

Topics

• Animals
• Catalase (pharmacology)
• Cell Line, Tumor
• Humans
• Hydrogen Peroxide (pharmacology)
• Mice
• Neoplasms (drug therapy)
• Photochemotherapy
• Photosensitizing Agents (therapeutic use)
• Tumor Microenvironment