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Kou M, Wang L. Surface toll-like receptor 9 on immune cells and its immunomodulatory effect. Front Immunol 2023; 14:1259989. [PMID: 37724102 PMCID: PMC10505433 DOI: 10.3389/fimmu.2023.1259989] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 08/22/2023] [Indexed: 09/20/2023] Open
Abstract
Toll like receptor 9 (TLR9) has been considered as a crucial intracellular pattern recognition receptor in the immune system, which can directly or indirectly mediate innate and adaptive immune responses by recognizing CpG DNA in endosomes to initiate its downstream signaling. However, TLR9 can also be expressed on the membrane surface of some immune and non-immune cells, called surface TLR9 (sTLR9), which covers the TLR9 and its immunomodulatory role with a mysterious veil. In this review, we mainly focus on the sTLR9 expressed on neutrophils, B cells and erythrocytes, and its immunomodulatory roles displayed alone or in coordination with endosomal TLR9 (eTLR9), providing a theoretical reference for the application of its modulators.
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Affiliation(s)
- Mengyuan Kou
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
| | - Liying Wang
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
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Kou M, Lu W, Zhu M, Qu K, Wang L, Yu Y. Massively recruited sTLR9 + neutrophils in rapidly formed nodules at the site of tumor cell inoculation and their contribution to a pro-tumor microenvironment. Cancer Immunol Immunother 2023:10.1007/s00262-023-03451-1. [PMID: 37079065 DOI: 10.1007/s00262-023-03451-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 04/10/2023] [Indexed: 04/21/2023]
Abstract
Neutrophils exert either pro- or anti-tumor activities. However, few studies have focused on neutrophils at the tumor initiation stage. In this study, we unexpectedly found a subcutaneous nodule in the groin areas of mice inoculated with tumor cells. The nodule was developed 24 h after the inoculation, filled with tumor cells and massively recruited neutrophils, being designated as tumor nodules. 22% of the neutrophils in tumor nodules are surface TLR9 (sTLR9) expressing neutrophils (sTLR9+ neutrophils). With tumor progression, sTLR9+ neutrophils were sustainably increased in tumor nodules/tumor tissues, reaching to 90.8% on day 13 after inoculation, with increased expression of IL-10 and decreased or no expression of TNFα. In vivo administration of CpG 5805 significantly reduced sTLR9 expression of the sTLR9+ neutrophils. The reduction of sTLR9 on neutrophils in tumor nodules contributed to the induction of an anti-tumor microenvironment conductive to the inhibition of tumor growth. Overall, the study provides insights for understanding the role of sTLR9+ neutrophils in the tumor development, especially in the early stage.
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Affiliation(s)
- Mengyuan Kou
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun, 130021, Jilin, People's Republic of China
| | - Wenting Lu
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, 130021, Jilin, People's Republic of China
| | - Mengru Zhu
- Department of Developmental-Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, 130021, Jilin, People's Republic of China
| | - Kuo Qu
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun, 130021, Jilin, People's Republic of China
| | - Liying Wang
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, 130021, Jilin, People's Republic of China.
| | - Yongli Yu
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun, 130021, Jilin, People's Republic of China.
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Wang H, Su Y, Chen D, Li Q, Shi S, Huang X, Fang M, Yang M. Advances in the mechanisms and applications of inhibitory oligodeoxynucleotides against immune-mediated inflammatory diseases. Front Pharmacol 2023; 14:1119431. [PMID: 36825156 PMCID: PMC9941346 DOI: 10.3389/fphar.2023.1119431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 01/26/2023] [Indexed: 02/09/2023] Open
Abstract
Inhibitory oligodeoxynucleotides (ODNs) are short single-stranded DNA, which capable of folding into complex structures, enabling them to bind to a large variety of targets. With appropriate modifications, the inhibitory oligodeoxynucleotides exhibited many features of long half-life time, simple production, low toxicity and immunogenicity. In recent years, inhibitory oligodeoxynucleotides have received considerable attention for their potential therapeutic applications in immune-mediated inflammatory diseases (IMIDs). Inhibitory oligodeoxynucleotides could be divided into three categories according to its mechanisms and targets, including antisense ODNs (AS-ODNs), DNA aptamers and immunosuppressive ODNs (iSup ODNs). As a synthetic tool with immunomodulatory activity, it can target RNAs or proteins in a specific way, resulting in the reduction, increase or recovery of protein expression, and then regulate the state of immune activation. More importantly, inhibitory oligodeoxynucleotides have been used to treat immune-mediated inflammatory diseases, including inflammatory disorders and autoimmune diseases. Several inhibitory oligodeoxynucleotide drugs have been developed and approved on the market already. These drugs vary in their chemical structures, action mechanisms and cellular targets, but all of them could be capable of inhibiting excessive inflammatory responses. This review summarized their chemical modifications, action mechanisms and applications of the three kinds of inhibitory oligodeoxynucleotidesin the precise treatment of immune-mediated inflammatory diseases.
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Affiliation(s)
- Hongrui Wang
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
| | - Yingying Su
- Department of Anatomy, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
| | - Duoduo Chen
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
| | - Qi Li
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
| | - Shuyou Shi
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
| | - Xin Huang
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
| | - Mingli Fang
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China,*Correspondence: Mingli Fang, ; Ming Yang,
| | - Ming Yang
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China,*Correspondence: Mingli Fang, ; Ming Yang,
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Li M, Wang Y, Sun Y, Cui H, Zhu SJ, Qiu HJ. Mucosal vaccines: Strategies and challenges. Immunol Lett 2019; 217:116-125. [PMID: 31669546 DOI: 10.1016/j.imlet.2019.10.013] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/08/2019] [Accepted: 10/21/2019] [Indexed: 02/07/2023]
Abstract
Mucosal immunization has potential benefits over conventional parenteral immunization, eliciting immune defense in both mucosal and systemic tissue for protecting from pathogen invasion at mucosal surfaces. To provide a first line of protection at these entry ports, mucosal vaccines have been developed and hold a significant promise for reducing the burden of infectious diseases. However, until very recently, only limited mucosal vaccines are available. This review summarizes recent advances in selected aspects regarding mucosal vaccination, including appropriate administration routes, reasonable formulations, antigen-sampling and immune responses of mucosal immunity, and the strategies used to improve mucosal vaccine efficacy. Finally, the challenges of developing successful mucosal vaccines and the potential solutions are discussed.
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Affiliation(s)
- Miao Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yi Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yuan Sun
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Hongyu Cui
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Shu J Zhu
- College of Animal Science, Zhejiang University, Hangzhou, China.
| | - Hua-Ji Qiu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China.
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Pan S, Xing H, Fu X, Yu H, Yang Z, Yang Y, Sun W. The Effect of Photothermal Therapy on Osteosarcoma With Polyacrylic Acid-Coated Gold Nanorods. Dose Response 2018; 16:1559325818789841. [PMID: 30181729 PMCID: PMC6116076 DOI: 10.1177/1559325818789841] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 06/20/2018] [Accepted: 06/26/2018] [Indexed: 02/04/2023] Open
Abstract
Background: Polyacrylic acid (PAA)–coated gold nanorods (GNRs) were prepared in this
research, and then the structure, stability, temperature increment
efficiency, and biocompatibility of GNRs@PAA were detected. Methods: It was demonstrated that GNRs@PAA coupled with an 808 nm laser had superior
efficiency of hyperthermia therapy for MG63 human osteosarcoma cell. Results: The mechanism of photothermal therapy of GNRs@PAA was explored, and it was
proved that damaged cell membrane and DNA integration caused cell apoptosis
and death, and the cell apoptosis rate had been obviously promoted by in
vitro photothermal therapy which exhibited time–dose dependence. Conclusion: The results demonstrated that the GNRs@PAA could be a promising candidate for
phototherapeutic applications in human osteosarcoma.
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Affiliation(s)
- Su Pan
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, Jilin, China.,These authors contributed equally to this study
| | - Hongcun Xing
- College of Life Sciences, Jilin University, Changchun, Jilin, China.,These authors contributed equally to this study
| | - Xuqi Fu
- College of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Hongmei Yu
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Zhaogang Yang
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
| | - Yudan Yang
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Wei Sun
- Department of Molecular Biology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China
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Meng X, Sun W, Ren Y, Xiao Y, Zhao P, Lu W, Hua L, Wang L, Wang L, Yu Y. Protective role of surface Toll-like receptor 9 expressing neutrophils in local inflammation during systemic inflammatory response syndrome in mice. Mol Immunol 2017; 90:74-86. [PMID: 28704709 DOI: 10.1016/j.molimm.2017.07.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/22/2017] [Accepted: 07/01/2017] [Indexed: 12/24/2022]
Abstract
Clinically, systemic inflammatory response syndrome (SIRS) occurs after serious trauma or sepsis. In sepsis, neutrophils are the major effector cells responsible for eliminating pathogens. However, the role of neutrophils in development of SIRS, especially in local inflammatory area, is controversial. In this study, we established a SIRS mouse model characterized with cytokine-mediated lethal shock by intraperitoneal injection of oligodexynucleotides containing CpG motifs (CpG ODN) in D-galactosamine (D-GalN) sensitized mice based on our previous work and found that abundant neutrophils were rapidly recruited into the peritoneal cavity, where some neutrophils expressed surface TLR9 (sTLR9), defined as sTLR9+ neutrophils. Along with the progression of SIRS, the expression of sTLR9 in sTLR9+ neutrophils isolated from peritoneal lavage cells (PLCs) was declined in accompany with an increase in the level of the inflammatory cytokine TNFα and a decrease in the level of the anti-inflammatory cytokine IL-10 in Ly6G+ PLCs. When using CCT ODN, an oligodeoxynucleotide with CCT repeats, which we have previously shown to be capable of rescuing mice from lethal shock, the expression of sTLR9 on neutrophils was significantly elevated. Adoptive therapy using early recruited neutrophil-rich PLCs containing sTLR9+ neutrophils that express high levels of sTLR9, could rescue mice from SIRS. Overall, the data reveal that the early recruited sTLR9+ neutrophils may, at least in the area of local inflammation, play a protective role during SIRS development and provide a method to rescue the patients with severe SIRS via the up-regulation of sTLR9 levels on the surface of neutrophils or via adoptive therapy with protective sub-populations of neutrophils.
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Affiliation(s)
- Xiuping Meng
- Department of Immunology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China; Department of Endodontics, School and Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Wei Sun
- Department of Molecular Biology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China
| | - Yunjia Ren
- Department of Endodontics, School and Hospital of Stomatology, Jilin University, Changchun, Jilin, China; Department of Molecular Biology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China
| | - Yue Xiao
- Department of Molecular Biology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China
| | - Peiyan Zhao
- Department of Molecular Biology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China
| | - Wenting Lu
- Department of Molecular Biology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China
| | - Li Hua
- Department of Immunology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China
| | - Luowei Wang
- Department of Molecular Biology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China
| | - Liying Wang
- Department of Molecular Biology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China.
| | - Yongli Yu
- Department of Immunology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin, China.
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Synergistic Stimulation with Different TLR7 Ligands Modulates Gene Expression Patterns in the Human Plasmacytoid Dendritic Cell Line CAL-1. Mediators Inflamm 2015; 2015:948540. [PMID: 26770023 PMCID: PMC4684865 DOI: 10.1155/2015/948540] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 10/31/2015] [Accepted: 11/03/2015] [Indexed: 12/26/2022] Open
Abstract
Objective. TLR7 ligation in plasmacytoid dendritic cells is promising for the treatment of cancer, allergy, and infectious diseases; however, high doses of ligands are required. We hypothesized that the combination of structurally different TLR7 ligands exponentiates the resulting immune response. Methods. CAL-1 (human pDC line) cells were incubated with the TLR7-specific adenine analog CL264 and single-stranded 9.2s RNA. Protein secretion was measured by ELISA. Microarray technique was used to detect modified gene expression patterns upon synergistic stimulation, revealing underlying functional groups and networks. Cell surface binding properties were studied using FACS analysis. Results. CL264 in combination with 9.2s RNA significantly enhanced cytokine and interferon secretion to supra-additive levels. This effect was due to a stronger stimulation of already regulated genes (by monostimulation) as well as to recruitment of thus far unregulated genes. Top scoring canonical pathways referred to immune-related processes. Network analysis revealed IL-1β, IL-6, TNF, and IFN-β as major regulatory nodes, while several minor regulatory nodes were also identified. Binding of CL264 to the cell surface was enhanced by 9.2s RNA. Conclusion. Structurally different TLR7 ligands act synergistically on gene expression patterns and on the resulting inflammatory response. These data could impact future strategies optimizing TLR7-targeted drug design.
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