Affiliation:
1. State Key Laboratory of Pharmaceutical Biotechnology The University of Hong Kong Hong Kong China
2. Department of Pharmacology and Pharmacy Li Ka Shing Faculty of Medicine The University of Hong Kong Hong Kong China
3. Dr. Li Dak‐Sum Research Centre The University of Hong Kong Hong Kong China
4. Department of Medicine Li Ka Shing Faculty of Medicine The University of Hong Kong Hong Kong China
5. Shanghai Frontiers Science Center of Genome Editing and Cell Therapy Shanghai Key Laboratory of Regulatory Biology Institute of Biomedical Sciences and School of Life Sciences East China Normal University Shanghai 201203 China
Abstract
AbstractFerroptosis as programmed cell death received considerable attention in cancer research. Recently, studies have associated ferroptosis with photodynamic therapy (PDT) because PDT promotes glutathione (GSH) deletion, glutathione peroxidase 4 (GPX4) degradation, and lipid peroxide accumulation. However, PDT‐induced ferroptosis may be potentially prevented by ferroptosis suppressor protein 1 (FSP1). To address this limitation, herein, a novel strategy is developed to trigger ferroptosis by PDT and FSP1 inhibition. For enhancement of this strategy, a photoresponsive nanocomplex, self‐assembled by BODIPY‐modified poly(amidoamine) (BMP), is utilized to stably encapsulate the inhibitor of FSP1 (iFSP1) and chlorin e6 (Ce6). The nanosystem promotes intracellular delivery, penetration, and accumulation of ferroptosis inducers in tumors with light irradiation. The nanosystem presents high‐performance triggering of ferroptosis and immunogenic cell death (ICD) in vitro and in vivo. Importantly, the nanoparticles increase tumor infiltration of CD8+ T cells and further enhance the efficacy of anti‐PD‐L1 immunotherapy. The study suggests the potential of photo‐enhanced synergistic induction of ferroptosis by the photoresponsive nanocomplexes in cancer immunotherapy.
Funder
National Natural Science Foundation of China
Subject
Pharmaceutical Science,Biomedical Engineering,Biomaterials
Cited by
2 articles.
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