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Liang H, Zhou L, Hu Z, Ge Y, Zhang T, Chen Q, Wang B, Lu S, Ding W, Dong J, Xue F, Jiang L. Siglec15 Checkpoint Blockade for Simultaneous Immunochemotherapy and Osteolysis Inhibition in Lung Adenocarcinoma Spinal Metastasis via a Hollow Nanoplatform. Small 2022; 18:e2107787. [PMID: 35751455 DOI: 10.1002/smll.202107787] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Low responsiveness to anti-programmed death-1/programmed death-ligand 1 (anti-PD-1/PD-L1) for solid tumors indicates the presence of other immunosuppressive pathways. Siglec15, a newly discovered immune checkpoint, has been reported to repress immune responses in the tumor microenvironment (TME) and regulate osteoclast differentiation. However, the role of Siglec15 in the treatment for bone metastasis remains unclear. Herein, Siglec15 shows significantly higher expression in lung adenocarcinoma spinal metastasis (LUAD-SM) than in para-cancerous spinal tissues and primary LUAD. Subsequently, a TME-responsive hollow MnO2 nanoplatform (H-M) loaded with Siglec15 siRNA and cisplatin (H-M@siS15/Cis) is developed, and the surface is modified with an aspartic acid octapeptide (Asp8 ), thus allowing H-M to target spinal metastasis. High drug-loading capacity, good biocompatibility, effective tumor accumulation, and efficient Siglec15 silencing are demonstrated. Furthermore, the nanoparticles could reverse immunosuppression caused by tumor cells and tumor-associated macrophages (TAMs) and inhibit osteoclast differentiation via Siglec15 downregulation in vitro. In a LUAD-SM mouse model, H-M@siS15/Cis-Asp8 exhibits superior therapeutic efficacy via synergetic immunochemotherapy and osteolysis inhibition. Taken together, this single nanoplatform reveals the therapeutic potential of the new immune checkpoint Siglec15 in LUAD-SM and provides a strategy to treat this disease.
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Affiliation(s)
- Haifeng Liang
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Lei Zhou
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Zhichao Hu
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Yuxiang Ge
- Department of Orthopedics Surgery, Minhang Hospital, Fudan University, Shanghai, 201100, China
| | - Taiwei Zhang
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Qing Chen
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Ben Wang
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Shunyi Lu
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Wang Ding
- Department of Orthopedics Surgery, Minhang Hospital, Fudan University, Shanghai, 201100, China
| | - Jian Dong
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of Orthopaedic Surgery, Zhongshan Hospital Wusong Branch, Fudan University, Shanghai, 200940, China
| | - Fengfeng Xue
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai University of Medicine and Health Sciences, Shanghai, 201318, China
| | - Libo Jiang
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
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