1
|
Arif S, Akhter M, Khaliq A, Akhtar MW. Fusion peptide constructs from antigens of M. tuberculosis producing high T-cell mediated immune response. PLoS One 2022; 17:e0271126. [PMID: 36174012 PMCID: PMC9521936 DOI: 10.1371/journal.pone.0271126] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 06/23/2022] [Indexed: 11/18/2022] Open
Abstract
Non availability of effective anti-TB vaccine impedes TB control which remains a crucial global health issue. A fusion molecule based on immunogenic antigens specific to different growth phases of Mycobacterium tuberculosis can enhance T-cell responses required for developing a potent vaccine. In this study, six antigens including EspC, TB10.4, HspX, PPE57, CFP21 and Rv1352 were selected for constructing EspC-TB10.4 (bifu25), TnCFP21-Rv1352 (bifu29), HspX-EspC-TB10.4 (trifu37), HspX-TnCFP21-Rv1352 (trifu44) and HspX-EspC-TB10.4-PPE57 (tetrafu56) fusion proteins. Th1-cell epitopes of EspC, PPE57 and Rv1352 antigens were predicted for the first time using different in silico tools. The fusion molecule tetrafu56, which consisted of antigens from both the replicating and the dormant stages of Mtb, induced a release of 397 pg/mL of IFN-γ from PBMCs of the active TB patients. This response was comparable to the response obtained with cocktail of the component antigens (396 pg/mL) as well as to the total of the responses obtained separately for each of its component antigens (388 pg/mL). However, PBMCs from healthy samples in response to tetrafu56 showed IFN-γ release of only 26.0 pg/mL Thus a previous exposure of PBMCs to Mtb antigens in TB plasma samples resulted in 15-fold increase in IFN-γ response to tetrafu56 as compared to the PBMCs from the healthy controls. Hence, most of the T-cell epitopes of the individual antigens seem to be available for T-cell interactions in the form of the fusion. Further investigation in animal models should substantiate the immune efficacy of the fusion molecule. Thus, the fusion tetrafu56 seems to be a potential candidate for developing an effective multistage vaccine against TB.
Collapse
Affiliation(s)
- Shaista Arif
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Mohsina Akhter
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Aasia Khaliq
- Department of Biology, Lahore University of Management Sciences (LUMS), Lahore, Pakistan
| | | |
Collapse
|
2
|
Li JP, Wu CY, Chen MY, Liu SX, Yan SM, Kang YF, Sun C, Grandis JR, Zeng MS, Zhong Q. PD-1 +CXCR5 -CD4 + Th-CXCL13 cell subset drives B cells into tertiary lymphoid structures of nasopharyngeal carcinoma. J Immunother Cancer 2021; 9:jitc-2020-002101. [PMID: 34253636 PMCID: PMC8276302 DOI: 10.1136/jitc-2020-002101] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2021] [Indexed: 02/05/2023] Open
Abstract
Background A major current challenge is to exploit tertiary lymphoid structures (TLSs) to promote the lymphocyte infiltration, activation and differentiation by tumor antigens to increase antitumor immune responses. The mechanisms that underlie the role of TLS formation in the adaptive immune responses against nasopharyngeal carcinoma (NPC) remain largely unknown. Methods Cell populations and the corresponding markers were identified by single-cell RNA sequencing and fluorescence-activated cell sorting analysis. In vitro differentiation experiments were used to simulate the generation, regulation and function of the Th-CXCL13 cell subset in the tumor microenvironment of NPC. These were followed by histological evaluation of the colocalization of tumor-associated B cells (TABs) and Th-CXCL13 cells within TLSs, and statistical analysis of the relationship between the cells in TLSs and overall survival. Results A PD-1+CXCR5−CD4+ Th-CXCL13 cell subset was identified in NPC. This subset was a major source of CXCL13, representing the majority of the CD4+ T cells at levels comparable with Th1 and Tfh cells present in the TLSs. Monocytes activated by toll-like receptor 4 agonists served as the antigen-presenting cells that most efficiently triggered the expansion of Th-CXCL13 cells. Transforming growth factor beta 1 (TGF-β1) stimulation and activation of Sox4 were critical for the induction and polarization of Th-CXCL13 cells in this process. The potential functional contributions of TABs recruited by Th-CXCL13 cells which induced plasma cell differentiation and immunoglobulin production via interleukin-21 and CD84 interactions in the TLSs demonstrated improved survival. Conclusions Induction of Th-CXCL13 cells links innate inflammation to immune privilege in tumor-associated TLSs and might predict better survival.
Collapse
Affiliation(s)
- Jiang-Ping Li
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, People's Republic of China.,Department of Oncological Radiotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Chang-You Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Ming-Yuan Chen
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, People's Republic of China.,Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Shang-Xin Liu
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, People's Republic of China
| | - Shu-Mei Yan
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, People's Republic of China.,Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Yin-Feng Kang
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, People's Republic of China
| | - Cong Sun
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, People's Republic of China
| | - Jennifer R Grandis
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California, USA
| | - Mu-Sheng Zeng
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, People's Republic of China
| | - Qian Zhong
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, People's Republic of China
| |
Collapse
|
3
|
Fan L, Wu Q, Kang S, Yang B, Wu C. The phenotypic and functional study of tissue B cells in respiratory system provided important information for diseases and development of vaccines. J Cell Mol Med 2021; 25:2621-2632. [PMID: 33481318 PMCID: PMC7933955 DOI: 10.1111/jcmm.16278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/10/2020] [Accepted: 12/17/2020] [Indexed: 12/25/2022] Open
Abstract
The field of tissue-resident B cells has received increasing attention, yet the feature of tissue B cells in respiratory system is unclear. Here, we first show that non-circulating B cells obtained from nasal, trachea and lung tissues are numerically and phenotypically distinct from their circulating counterparts. Analysis of single cell transcriptome sequence identified multiple differentially expressed genes between non-circulating B cells and circulating B cells, which illustrated their heterogeneity. Furthermore, we found high expression of CXCR3 on non-circulating B cells, and the chemokine CXCL11 was also up-regulated in the respiratory tissues, suggesting that CXCR3-CXCL11 axis might accelerate the local resident of non-circulating B cells in respiratory tract. Interestingly, intranasal immunization with BCG in mice elicited a sustained humoral immune response via induction of IgA and IgG Abs, which revealed the role of B cells. Meanwhile, tissue-resident B cells, IgA+ and IgG+ memory B cells (MBCs) in respiratory tissues, as well as plasma cells in bone marrow, were expanded and maintained, and these subsets probably developed into antibody-producing cells to participate in the local humoral immunity. Our data illustrate the phenotype and function of tissue B cells in the upper and lower airways, provide references for the prospective development of vaccines.
Collapse
Affiliation(s)
- Li Fan
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Medical College, Hubei University of Arts and Science, Xiangyang, China
| | - Qiongli Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Shuangpeng Kang
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Binyan Yang
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Changyou Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Clifford Hospital, Jinan University, Guangzhou, China
| |
Collapse
|
4
|
Kang S, Wu Q, Huang J, Yang B, Liang C, Chi P, Wu C. Tissue Resident Memory γδT Cells in Murine Uterus Expressed High Levels of IL-17 Promoting the Invasion of Trophocytes. Front Immunol 2021; 11:588227. [PMID: 33519808 PMCID: PMC7840782 DOI: 10.3389/fimmu.2020.588227] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 12/02/2020] [Indexed: 12/11/2022] Open
Abstract
γδT cells are non-conventional T cells and serve as the bridge for connecting the innate and adaptive immune systems. γδT cells form a substantial population at barrier sites and play an important role in the development of physiology, inflammation, autoimmune diseases and tumors. γδT cells not only distribute in the maternal-fetal interface during pregnancy but also in non-pregnant uterus. However, the phenotypes and functions of γδT cells in uterus were not clear. In the current study, we found that the percentages of γδT cells were significantly higher in uterus than peripheral blood and most of γδT cells in uterus were distributed in endometrium. Further studies indicated that the majority of γδT cells in uterus were memory cells with higher expression of CD44 and CD27 but lower expression of CD62L and CCR7 compared to those in blood. In addition, we found that γδT cells in uterus were tissue resident memory γδT cells expressing CD69, expressed high levels of CCR6, GranzymeB and CD107a. Moreover, γδT cells in uterus were activated and fully expressed transcription factor RORγt. After short time of activation, γδT cells in uterus significantly expressed high levels of IL-17 but not IFN-γ, which promotes the invasion of murine trophocytes. Taken together, our study will lay the foundation for future research on uterine γδT cells in pregnancy and autoimmune disease.
Collapse
Affiliation(s)
- Shuangpeng Kang
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Qiongli Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Jun Huang
- Key Laboratory of Immunology, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Binyan Yang
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Changyan Liang
- Department of Gynecology and Obstetrics, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Peidong Chi
- Department of Clinical Laboratory, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Changyou Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
5
|
|
6
|
Guo Q, Bi J, Li M, Ge W, Xu Y, Fan W, Wang H, Zhang X. ESX Secretion-Associated Protein C From Mycobacterium tuberculosis Induces Macrophage Activation Through the Toll-Like Receptor-4/Mitogen-Activated Protein Kinase Signaling Pathway. Front Cell Infect Microbiol 2019; 9:158. [PMID: 31134163 PMCID: PMC6523024 DOI: 10.3389/fcimb.2019.00158] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 04/26/2019] [Indexed: 11/13/2022] Open
Abstract
Mycobacterium tuberculosis, as a facultative intracellular pathogen, can interact with host macrophages and modulate macrophage function to influence innate and adaptive immunity. Proteins secreted by the ESX-1 secretion system are involved in this relationship. Although the importance of ESX-1 in host-pathogen interactions and virulence is well-known, the primary role is ascribed to EsxA (EAST-6) in mycobacterial pathogenesis and the functions of individual components in the interactions between pathogens and macrophages are still unclear. Here, we investigated the effects of EspC on macrophage activation. The EspC protein is encoded by an espA/C/D cluster, which is not linked to the esx-1 locus, but is essential for the secretion of the major virulence factors of ESX-1, EsxA and EsxB. Our results showed that both EspC protein and EspC overexpression in M. smegmatis induced pro-inflammatory cytokines and enhanced surface marker expression. This mechanism was dependent on Toll-like receptor 4 (TLR4), as demonstrated using EspC-treated macrophages from TLR4-/- mice, leading to decreased pro-inflammatory cytokine secretion and surface marker expression compared with those from wild-type mice. Immunoprecipitation and immunofluorescence assays showed that EspC interacted with TLR4 directly. Moreover, EspC could activate macrophages and promote antigen presentation by inducing mitogen-activated protein kinase (MAPK) phosphorylation and nuclear factor-κB activation. The EspC-induced cytokine expression, surface marker upregulation, and MAPK signaling activation were inhibited when macrophages were blocked with anti-TLR4 antibodies or pretreated with MAPK inhibitors. Furthermore, our results showed that EspC overexpression enhanced the survival of M. smegmatis within macrophages and under stress conditions. Taken together, our results indicated that EspC may be another ESX-1 virulence factor that not only modulates the host innate immune response by activating macrophages through TLR4-dependent MAPK signaling but also plays an important role in the survival of pathogenic mycobacteria in host cells.
Collapse
Affiliation(s)
- Qinglong Guo
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, China
| | - Jing Bi
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, China.,Key Laboratory of Medical Molecular Virology, Ministry of Education and Health, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Ming Li
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, China
| | - Wenxue Ge
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, China
| | - Ying Xu
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, China
| | - Weixing Fan
- Laboratory of Zoonosis, China Animal Health and Epidemiology Center, Qingdao, China
| | - Honghai Wang
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, China
| | - Xuelian Zhang
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, China
| |
Collapse
|
7
|
Bahr NC, Meintjes G, Boulware DR. Inadequate diagnostics: the case to move beyond the bacilli for detection of meningitis due to Mycobacterium tuberculosis. J Med Microbiol 2019; 68:755-760. [PMID: 30994435 PMCID: PMC7176281 DOI: 10.1099/jmm.0.000975] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Tuberculosis (TB) meningitis is extremely difficult to diagnose due to its pauci-bacillary disease nature and new techniques are needed. Improved test sensitivity would allow for greater clinician confidence in diagnostic testing and has the potential to improve patient outcomes. Traditional microbiologic and molecular tests for TB meningitis focus on detection of TB bacilli and are inadequate. Smear microscopy is rapid but only ~10-15 % sensitive. Culture has 50-60 % sensitivity but is slow. Xpert MTB/Rif Ultra is a rapid, automated PCR-based assay with ~70 % sensitivity versus clinical case definition. Thus, even the best current testing may miss up to 30 % of cases. Clinicians are often left to treat empirically with prolonged regimens with significant side effects or risk a missed case that would result in death. Rather than relying strictly on microbiologic or molecular testing to diagnose TB meningitis, we propose that testing of CSF for biomarkers of host response may have an adjunctive role to play in improving the diagnosis of TB meningitis.
Collapse
Affiliation(s)
- Nathan C. Bahr
- University of Kansas, Kansas City, KS, USA
- *Correspondence: Nathan C. Bahr,
| | | | | |
Collapse
|
8
|
Li J, Jin C, Wu C, Huang J. PD-1 modulating Mycobacterium tuberculosis-specific polarized effector memory T cells response in tuberculosis pleurisy. J Leukoc Biol 2019; 106:733-747. [PMID: 30861206 DOI: 10.1002/jlb.ma1118-450rr] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 02/27/2019] [Accepted: 02/28/2019] [Indexed: 12/11/2022] Open
Abstract
Host-pathogen interactions in tuberculosis (TB) should be studied at the disease sites because Mycobacterium tuberculosis (M.tb) is predominantly contained in local tissue lesions. T-cell immune responses are required to mount anti-mycobacterial immunity. However, T-cell immune responses modulated by programmed cell death protein 1 (PD-1) during tuberculosis pleurisy (TBP) remains poorly understood. We selected the pleural fluid mononuclear cells (PFMCs) from TBP and PBMCs from healthy donors (HD), and characterized PD-1-expresing T-cell phenotypes and functions. Here, we found that the PFMCs exhibited increases in numbers of PD-1-expressing CD4+ and CD8+ T cells, which preferentially displayed polarized effector memory phenotypes. The M.tb-specific Ag stimulation increased CD4+ PD-1+ and CD8+ PD-1+ T cells, which is in direct correlation with IFN-γ production and PD-L1+ APCs in PFMCs of these individuals. Moreover, blockage of PD-1/PD-L1 pathway enhanced the percentage of IFN-γ+ T cells, demonstrating that the PD-1/PD-L1 pathway played a negative regulation in T cell effector functions. Furthermore, CD4+ PD-1+ and CD8+ PD-1+ T-cell subsets showed greater memory phenotype, activation, and effector functions for producing Th1 cytokines than PD-1- counterparts. Thus, these PD-1+ T cells were not exhausted but appear to be central to maintaining Ag-specific effector. IL-12, a key immunoregulatory cytokine, enhanced the expression of PD-1 and restored a strong IFN-γ response through selectively inducing the phosphorylation of STAT4 in CD4+ PD-1+ T-bet+ and CD8+ PD-1+ T-bet+ T cells. This study therefore uncovered a previously unknown mechanism for T-cell immune responses regulated by PD-1, and may have implications for potential immune intervention in TBP.
Collapse
Affiliation(s)
- Jiangping Li
- The Second Affiliated Hospital, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, P. R. China.,Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, P. R. China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, P. R. China
| | - Chenxi Jin
- The Second Affiliated Hospital, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, P. R. China
| | - Changyou Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, P. R. China
| | - Jun Huang
- The Second Affiliated Hospital, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, P. R. China
| |
Collapse
|
9
|
Li J, Zhao J, Shen J, Wu C, Liu J. Intranasal immunization with Mycobacterium tuberculosis Rv3615c induces sustained adaptive CD4 + T-cell and antibody responses in the respiratory tract. J Cell Mol Med 2018; 23:596-609. [PMID: 30353641 PMCID: PMC6307849 DOI: 10.1111/jcmm.13965] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 09/20/2018] [Accepted: 09/23/2018] [Indexed: 02/04/2023] Open
Abstract
Sustained adaptive immunity to pathogens provides effective protection against infections, and effector cells located at the site of infection ensure rapid response to the challenge. Both are essential for the success of vaccine development. To explore new vaccination approach against Mycobacterium tuberculosis (M.tb) infection, we have shown that Rv3615c, identified as ESX-1 substrate protein C of M.tb but not expressed in BCG, induced a dominant Th1-type response of CD4+ T cells from patients with tuberculosis pleurisy, which suggests a potential candidate for vaccine development. But subcutaneous immunization with Rv3615c induced modest T-cell responses systemically, and showed suboptimal protection against virulent M.tb challenge at the site of infection. Here, we use a mouse model to demonstrate that intranasal immunization with Rv3615c induces sustained capability of adaptive CD4+ T- and B-cell responses in lung parenchyma and airway. Rv3615c contains a dominant epitope of mouse CD4+ T cells, Rv3615c41-50 , and elicits CD4+ T-cell response with an effector-memory phenotype and multi-Th1-type cytokine coexpressions. Since T cells resident at mucosal tissue are potent at control of infection at early stage, our data show that intranasal immunization with Rv3615c promotes a sustained regional immunity to M.tb, and suggests a potency in control of M.tb infection. Our study warranties a further investigation of Rv3615c as a candidate for development of effective vaccination against M.tb infection.
Collapse
Affiliation(s)
- Jiangping Li
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China.,Laboratory of Infectious Diseases and Vaccine, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Jun Zhao
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Juan Shen
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Changyou Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Jie Liu
- Laboratory of Infectious Diseases and Vaccine, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
10
|
Shen J, Luo X, Wu Q, Huang J, Xiao G, Wang L, Yang B, Li H, Wu C. A Subset of CXCR5 +CD8 + T Cells in the Germinal Centers From Human Tonsils and Lymph Nodes Help B Cells Produce Immunoglobulins. Front Immunol 2018; 9:2287. [PMID: 30344522 PMCID: PMC6183281 DOI: 10.3389/fimmu.2018.02287] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 09/14/2018] [Indexed: 01/14/2023] Open
Abstract
Recent studies indicated that CXCR5+CD8+ T cells in lymph nodes could eradicate virus-infected target cells. However, in the current study we found that a subset of CXCR5+CD8+ T cells in the germinal centers from human tonsils or lymph nodes are predominately memory cells that express CD45RO and CD27. The involvement of CXCR5+CD8+ T cells in humoral immune responses is suggested by their localization in B cell follicles and by the concomitant expression of costimulatory molecules, including CD40L and ICOS after activation. In addition, CXCR5+CD8+ memory T cells produced significantly higher levels of IL-21, IFN-γ, and IL-4 at mRNA and protein levels compared to CXCR5−CD8+ memory T cells, but IL-21-expressing CXCR5+CD8+ T cells did not express Granzyme B and perforin. When cocultured with sorted B cells, sorted CXCR5+CD8+ T cells promoted the production of antibodies compared to sorted CXCR5−CD8+ T cells. However, fixed CD8+ T cells failed to help B cells and the neutralyzing antibodies against IL-21 or CD40L inhibited the promoting effects of sorted CXCR5+CD8+ T cells on B cells for the production of antibodies. Finally, we found that in the germinal centers of lymph nodes from HIV-infected patients contained more CXCR5+CD8+ T cells compared to normal lymph nodes. Due to their versatile functional capacities, CXCR5+CD8+ T cells are promising candidate cells for immune therapies, particularly when CD4+ T cell help are limited.
Collapse
Affiliation(s)
- Juan Shen
- Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Zhongshan School of Medicine, Institute of Immunology, Sun Yat-sen University, Guangzhou, China
| | - Xi Luo
- Affiliated Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Qiongli Wu
- Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Zhongshan School of Medicine, Institute of Immunology, Sun Yat-sen University, Guangzhou, China
| | - Jun Huang
- Department of Pathogenic Biology and Immunology, Institute of Immunology, Guangzhou Medical University, Guangzhou, China
| | - Guanying Xiao
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Liantang Wang
- Department of Pathology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Binyan Yang
- Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Zhongshan School of Medicine, Institute of Immunology, Sun Yat-sen University, Guangzhou, China
| | - Huabin Li
- Eye and Ent Hospital of Fudan Hospital, Shanghai, China
| | - Changyou Wu
- Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Zhongshan School of Medicine, Institute of Immunology, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|