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Wei T, Li Y, Li B, Xie Q, Huang Y, Wu Z, Chen H, Meng Y, Liang L, Wang M, Geng J, Lei M, Shang J, Guo S, Yang Z, Jia H, Ren F, Zhao T. Plasmid co-expressing siRNA-PD-1 and Endostatin carried by attenuated Salmonella enhanced the anti-melanoma effect via inhibiting the expression of PD-1 and VEGF on tumor-bearing mice. Int Immunopharmacol 2024; 127:111362. [PMID: 38103411 DOI: 10.1016/j.intimp.2023.111362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/04/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
Melanoma, the most perilous form of skin cancer, is known for its inherent resistance to chemotherapy. Even with advances in tumor immunotherapy, the survival of patients with advanced or recurrent melanomas remains poor. Over time, melanoma tumor cells may produce excessive angiogenic factors, necessitating the use of combinations of angiogenesis inhibitors, including broad-spectrum options, to combat melanoma. Among these inhibitors, Endostatin is one of the most broad-spectrum and least toxic angiogenesis inhibitors. We found Endostatin significantly increased the infiltration of CD8+ T cells and reduced the infiltration of M2 tumor-associated macrophages (TAMs) in the melanoma tumor microenvironment (TME). Interestingly, we also observed high expression levels of programmed death 1 (PD-1), an essential immune checkpoint molecule associated with tumor immune evasion, within the melanoma tumor microenvironment despite the use of Endostatin. To address this issue, we investigated the effects of a plasmid expressing Endostatin and PD-1 siRNA, wherein Endostatin was overexpressed while RNA interference (RNAi) targeted PD-1. These therapeutic agents were delivered using attenuated Salmonella in melanoma-bearing mice. Our results demonstrate that pEndostatin-siRNA-PD-1 therapy exhibits optimal therapeutic efficacy against melanoma. We found that pEndostatin-siRNA-PD-1 therapy promotes the infiltration of CD8+ T cells and the expression of granzyme B in melanoma tumors. Importantly, combined inhibition of angiogenesis and PD-1 significantly suppresses melanoma tumor progression compared with the inhibition of angiogenesis or PD-1 alone. Based on these findings, our study suggests that combining PD-1 inhibition with angiogenesis inhibitors holds promise as a clinical strategy for the treatment of melanoma.
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Affiliation(s)
- Tian Wei
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Yang Li
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Henan Key Laboratory of Precision Diagnosis of Respiratory Infectious Diseases, Zhengzhou Key Laboratory of Precision Diagnosis of Respiratory Infectious Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, Henan, PR China
| | - Baozhu Li
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Qian Xie
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Yujing Huang
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Zunge Wu
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Haoqi Chen
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Ying Meng
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Lirui Liang
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Ming Wang
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Jiaxin Geng
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Mengyu Lei
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Jingli Shang
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Henan International Joint Laboratory of Immunity and Targeted Therapy for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang, Henan 453000, PR China
| | - Sheng Guo
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Zishan Yang
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Huijie Jia
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China
| | - Feng Ren
- Henan International Joint Laboratory of Immunity and Targeted Therapy for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang, Henan 453000, PR China.
| | - Tiesuo Zhao
- Department of Immunology, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang 453000, Henan, PR China; Xinxiang Engineering Technology Research Center of Immune Checkpoint Drug for Liver-Intestinal Tumors, Xinxiang Medical University, Xinxiang 453000, Henan, PR China.
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