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Xie F, Tang S, Zhang Y, Zhao Y, Lin Y, Yao Y, Wang M, Gu Z, Wan J. Designing Peptide-Based Nanoinhibitors of Programmed Cell Death Ligand 1 (PD-L1) for Enhanced Chemo-immunotherapy. ACS NANO 2024; 18:1690-1701. [PMID: 38165832 DOI: 10.1021/acsnano.3c09968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
The combination of immune checkpoint blockade (ICB) and chemotherapy has shown significant potential in the clinical treatment of various cancers. However, circulating regeneration of PD-L1 within tumor cells greatly limits the efficiency of chemo-immunotherapy and consequent patient response rates. Herein, we report the synthesis of a nanoparticle-based PD-L1 inhibitor (FRS) with a rational design for effective endogenous PD-L1 suppression. The nanoinhibitor is achieved through self-assembly of fluoroalkylated competitive peptides that target PD-L1 palmitoylation. The FRS nanoparticles provide efficient protection and delivery of functional peptides to the cytoplasm of tumors, showing greater inhibition of PD-L1 than nonfluorinated peptidic inhibitors. Moreover, we demonstrate that FRS synergizes with chemotherapeutic doxorubicin (DOX) to boost the antitumor activities via simultaneous reduction of PD-L1 abundance and induction of immunogenic cell death in murine colon tumor models. The nano strategy of PD-L1 regulation present in this study is expected to advance the development of ICB inhibitors and overcome the limitations of conventional ICB-assisted chemo-immunotherapy.
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Affiliation(s)
- Fengjuan Xie
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, People's Republic of China
| | - Shasha Tang
- Department of Breast Surgery, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, People's Republic of China
| | - Ye Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, People's Republic of China
| | - Yinbing Zhao
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, People's Republic of China
| | - Yingying Lin
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, People's Republic of China
| | - Yining Yao
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, People's Republic of China
| | - Meiyan Wang
- School of Medicine, Shanghai University, Shanghai 200444, People's Republic of China
| | - Zhengying Gu
- Shanghai Institute of Thoracic Oncology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, People's Republic of China
- Department of Clinical Laboratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, People's Republic of China
| | - Jingjing Wan
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, People's Republic of China
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