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Samiei H, Ajam F, Gharavi A, Abdolmaleki S, Kokhaei P, Mohammadi S, Memarian A. Simultaneous disruption of circulating miR-21 and cytotoxic T lymphocytes (CTLs): Prospective diagnostic and prognostic markers for esophageal squamous cell carcinoma (ESCC). J Clin Lab Anal 2022; 36:e24125. [PMID: 34799871 PMCID: PMC8761409 DOI: 10.1002/jcla.24125] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/06/2021] [Accepted: 11/09/2021] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Esophageal squamous cell carcinoma (ESCC) as the most prominent type of esophageal cancer (EC) in developing countries encompasses a substantial contribution of cancer-related mortalities and morbidities. Cytotoxic T lymphocytes (CTLs) are the major subset of effector T cells against cancer. However, the microRNAs involved in the development and regulation of CTLs could be disrupted in cancers such as EC. METHODS Here, we evaluated the population of IL-10, TGF-β, IFN-γ, and IL-17a-producing CD3+CD8+ T cells, their association with the circulating levels of miR-21 and miR-29b, and their diagnostic and/or prognostic (after 160 weeks of follow-up) utilities in 34 ESCC patients (12 newly diagnosed: ND, 24 under-treatment: UT) and 34 matched healthy donors. RESULTS The population of IL-10 and TGF-β-producing CTLs (CD8+ Tregs) were considerably expanded, in addition to the overexpression of miR-21 in both groups (ND and UT) of ESCC patients, while the frequency of Tc17 and CD8+ Treg cells increased only in UT patients. The expression means of TGF-β and IL-10 in CTLs were considered to be excellent biomarkers (1 ≥ area under the curve: AUC ≥0.9) in distinguishing ESCC patients and associated subgroups from healthy subjects. Moreover, the lower expressions of TGF-β, IL-17a, IL-10, and IFN-γ in CTLs were associated with ESCC better prognosis. CONCLUSIONS The association between the impaired function of CD3+ CD8+ T cell subsets and miR-21 expression could be introduced as novel therapeutic targets and powerful diagnostic and prognostic markers for ESCC.
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Affiliation(s)
- Hadiseh Samiei
- Immunology DepartmentFaculty of MedicineSemnan University of Medical SciencesSemnanIran
| | - Faezeh Ajam
- Immunology DepartmentFaculty of MedicineGolestan University of Medical SciencesGorganIran
| | - Abdolsamad Gharavi
- Digestive Diseases Research InstituteTehran University of Medical SciencesTehranIran
- Golestan Research Center of Gastroenterology and HepatologyGolestan University of Medical SciencesGorganIran
| | - Sara Abdolmaleki
- Clinical Immunology LaboratoryDeziani Specialized and Advanced ClinicGolestan University of Medical SciencesGorganIran
| | - Parviz Kokhaei
- Immune and Gene Therapy LaboratoryCancer Centre KarolinskaDepartment of Oncology and PathologyKarolinska InstituteStockholmSweden
- Cancer Research Center and Department of ImmunologySemnan University of Medical SciencesSemnanIran
| | - Saeed Mohammadi
- Stem Cell Research CenterGolestan University of Medical SciencesGorganIran
- Infectious Diseases Research CenterGolestan University of Medical SciencesGorganIran
| | - Ali Memarian
- Golestan Research Center of Gastroenterology and HepatologyGolestan University of Medical SciencesGorganIran
- Department of ImmunologySchool of MedicineGolestan University of Medical SciencesGorganIran
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Adabor ES. Computational investigations of the immune response to repeated influenza infections and vaccinations. ROYAL SOCIETY OPEN SCIENCE 2021; 8:201433. [PMID: 33959318 PMCID: PMC8074957 DOI: 10.1098/rsos.201433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
Previous studies have shown that repeated influenza vaccination can enhance susceptibility to subsequent infection with a drifted influenza virus strain. This paper seeks to further understanding of the interactions between influenza viruses and specific immune cells that accompany this phenomenon. The paper argues that repeated vaccination increases susceptibility to infection only in the context of a residual immunity induced by prior vaccination or infection. The results of computational analysis indicate that this is a dynamic consequence of interactions between vaccines, influenza viruses and specific immune cells. In particular, mathematical modelling was used to show that in the presence of residual immunity conferred by a vaccine administered in Canada in the 2013-2014 influenza season, the 2014-2015 season vaccine enhanced susceptibility to infection. Such infection enhancement occurs when the 2014-2015 vaccine boosts suppressive T-regulatory cells induced by the 2013-2014 vaccine, decreasing the strength of antibody responses to the infecting strain. Overall, the study suggests probable characteristics of infecting viruses and vaccines that make repeated influenza infections and vaccinations detrimental.
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Affiliation(s)
- Emmanuel S. Adabor
- Reserch Centre, African Institute for Mathematical Sciences, Cape Town, South Africa
- Department of Mathematical Sciences, Stellenbosch University, Stellenbosch, South Africa
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Noble A, Mehta H, Lovell A, Papaioannou E, Fairbanks L. IL-12 and IL-4 activate a CD39-dependent intrinsic peripheral tolerance mechanism in CD8(+) T cells. Eur J Immunol 2016; 46:1438-48. [PMID: 26990545 PMCID: PMC5071739 DOI: 10.1002/eji.201545939] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 02/09/2016] [Accepted: 03/11/2016] [Indexed: 11/07/2022]
Abstract
Immune responses to protein antigens involve CD4(+) and CD8(+) T cells, which follow distinct programs of differentiation. Naïve CD8 T cells rapidly develop cytotoxic T-cell (CTL) activity after T-cell receptor stimulation, and we have previously shown that this is accompanied by suppressive activity in the presence of specific cytokines, i.e. IL-12 and IL-4. Cytokine-induced CD8(+) regulatory T (Treg) cells are one of several Treg-cell phenotypes and are Foxp3(-) IL-10(+) with contact-dependent suppressive capacity. Here, we show they also express high level CD39, an ecto-nucleotidase that degrades extracellular ATP, and this contributes to their suppressive activity. CD39 expression was found to be upregulated on CD8(+) T cells during peripheral tolerance induction in vivo, accompanied by release of IL-12 and IL-10. CD39 was also upregulated during respiratory tolerance induction to inhaled allergen and on tumor-infiltrating CD8(+) T cells. Production of IL-10 and expression of CD39 by CD8(+) T cells was independently regulated, being respectively blocked by extracellular ATP and enhanced by an A2A adenosine receptor agonist. Our results suggest that any CTL can develop suppressive activity when exposed to specific cytokines in the absence of alarmins. Thus negative feedback controls CTL expansion under regulation from both nucleotide and cytokine environment within tissues.
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Affiliation(s)
- Alistair Noble
- MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, UK
| | - Hema Mehta
- MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, UK
| | - Andrew Lovell
- MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, UK
| | | | - Lynette Fairbanks
- Purine Research Laboratory, Viapath, St Thomas' Hospital, London, UK
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4
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Zhang ZQ, Wang J, Hoy Z, Keegan A, Bhagwat S, Gigliotti F, Wright TW. Neither classical nor alternative macrophage activation is required for Pneumocystis clearance during immune reconstitution inflammatory syndrome. Infect Immun 2015; 83:4594-603. [PMID: 26371121 PMCID: PMC4645389 DOI: 10.1128/iai.00763-15] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/05/2015] [Indexed: 11/20/2022] Open
Abstract
Pneumocystis is a respiratory fungal pathogen that causes pneumonia (Pneumocystis pneumonia [PcP]) in immunocompromised patients. Alveolar macrophages are critical effectors for CD4(+) T cell-dependent clearance of Pneumocystis, and previous studies found that alternative macrophage activation accelerates fungal clearance during PcP-related immune reconstitution inflammatory syndrome (IRIS). However, the requirement for either classically or alternatively activated macrophages for Pneumocystis clearance has not been determined. Therefore, RAG2(-/-) mice lacking either the interferon gamma (IFN-γ) receptor (IFN-γR) or interleukin 4 receptor alpha (IL-4Rα) were infected with Pneumocystis. These mice were then immune reconstituted with wild-type lymphocytes to preserve the normal T helper response while preventing downstream effects of Th1 or Th2 effector cytokines on macrophage polarization. As expected, RAG2(-/-) mice developed severe disease but effectively cleared Pneumocystis and resolved IRIS. Neither RAG/IFN-γR(-/-) nor RAG/IL-4Rα(-/-) mice displayed impaired Pneumocystis clearance. However, RAG/IFN-γR(-/-) mice developed a dysregulated immune response, with exacerbated IRIS and greater pulmonary function deficits than those in RAG2 and RAG/IL-4Rα(-/-) mice. RAG/IFN-γR(-/-) mice had elevated numbers of lung CD4(+) T cells, neutrophils, eosinophils, and NK cells but severely depressed numbers of lung CD8(+) T suppressor cells. Impaired lung CD8(+) T cell responses in RAG/IFN-γR(-/-) mice were associated with elevated lung IFN-γ levels, and neutralization of IFN-γ restored the CD8 response. These data demonstrate that restricting the ability of macrophages to polarize in response to Th1 or Th2 cytokines does not impair Pneumocystis clearance. However, a cell type-specific IFN-γ/IFN-γR-dependent mechanism regulates CD8(+) T suppressor cell recruitment, limits immunopathogenesis, preserves lung function, and enhances the resolution of PcP-related IRIS.
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MESH Headings
- Animals
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/microbiology
- CD8-Positive T-Lymphocytes/pathology
- DNA-Binding Proteins/deficiency
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/immunology
- Eosinophils/immunology
- Eosinophils/microbiology
- Eosinophils/pathology
- Gene Expression Regulation
- Host-Pathogen Interactions
- Immune Reconstitution Inflammatory Syndrome/genetics
- Immune Reconstitution Inflammatory Syndrome/immunology
- Immune Reconstitution Inflammatory Syndrome/microbiology
- Immune Reconstitution Inflammatory Syndrome/pathology
- Killer Cells, Natural/immunology
- Killer Cells, Natural/microbiology
- Killer Cells, Natural/pathology
- Lung/immunology
- Lung/microbiology
- Lung/pathology
- Macrophage Activation
- Macrophages, Alveolar/immunology
- Macrophages, Alveolar/microbiology
- Macrophages, Alveolar/pathology
- Mice
- Mice, Knockout
- Mice, SCID
- Neutrophils/immunology
- Neutrophils/microbiology
- Neutrophils/pathology
- Pneumocystis/immunology
- Pneumocystis/pathogenicity
- Pneumonia, Pneumocystis/genetics
- Pneumonia, Pneumocystis/immunology
- Pneumonia, Pneumocystis/microbiology
- Pneumonia, Pneumocystis/pathology
- Receptors, Cell Surface/deficiency
- Receptors, Cell Surface/genetics
- Receptors, Cell Surface/immunology
- Receptors, Interferon/deficiency
- Receptors, Interferon/genetics
- Receptors, Interferon/immunology
- Signal Transduction
- T-Lymphocytes, Helper-Inducer/immunology
- T-Lymphocytes, Helper-Inducer/microbiology
- T-Lymphocytes, Helper-Inducer/pathology
- Th1-Th2 Balance
- Interferon gamma Receptor
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Affiliation(s)
- Zhuo-Qian Zhang
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Jing Wang
- Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Zachary Hoy
- Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Achsah Keegan
- Center for Vascular and Inflammatory Diseases, Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Samir Bhagwat
- Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Francis Gigliotti
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Terry W Wright
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
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Osteoclasts and CD8 T cells form a negative feedback loop that contributes to homeostasis of both the skeletal and immune systems. Clin Dev Immunol 2013; 2013:429373. [PMID: 23840242 PMCID: PMC3690642 DOI: 10.1155/2013/429373] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 05/22/2013] [Indexed: 11/18/2022]
Abstract
There are a number of dynamic regulatory loops that maintain homeostasis of the immune and skeletal systems. In this review, we highlight a number of these regulatory interactions that contribute to maintaining homeostasis. In addition, we review data on a negative regulatory feedback loop between osteoclasts and CD8 T cells that contributes to homeostasis of both the skeletal and immune systems.
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6
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Wang H, Daniel V, Sadeghi M, Opelz G. Differences in the Induction of Induced Human CD4+ CD25+ FoxP3+ T-Regulatory Cells and CD3+ CD8+ CD28− T-Suppressor Cells Subset Phenotypes In Vitro: Comparison of Phorbol 12-Myristate 13-Acetate/Ionomycin and Phytohemagglutinin Stimulation. Transplant Proc 2013; 45:1822-31. [DOI: 10.1016/j.transproceed.2012.10.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 10/09/2012] [Indexed: 12/22/2022]
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7
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Song G, Wang X, Jia J, Yuan Y, Wan F, Zhou X, Yang H, Ren J, Gu J, Lyerly HK. Elevated level of peripheral CD8(+)CD28(-) T lymphocytes are an independent predictor of progression-free survival in patients with metastatic breast cancer during the course of chemotherapy. Cancer Immunol Immunother 2013; 62:1123-30. [PMID: 23604172 PMCID: PMC11029068 DOI: 10.1007/s00262-013-1424-8] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Accepted: 03/30/2013] [Indexed: 11/26/2022]
Abstract
PURPOSE Suppression of cellular immunity resulting from tumorigenesis and/or therapy might promote cancer cells' growth, progression and invasion. Here, we explored whether T lymphocyte subtypes from peripheral blood of metastatic breast cancer (MBC) female patients could be used as alternative surrogate markers for cancer progress. Additionally, plasma levels of interleukin (IL)-2, IL-4, IL-6, IL-10, IFN-γ, and transforming growth factor-β1 were quantitated from MBC and healthy volunteers. EXPERIMENTAL DESIGN This study included 89 female MBC patients during the post-salvage chemotherapy follow-up and 50 age- and sex-matched healthy volunteers as control. The percentages of T lymphocyte subpopulations from peripheral blood and plasma levels of cytokines were measured. RESULTS Both CD8(+)CD28(-) and CD4(+)CD25(+) were elevated in MBC patients compared to the control cohort (P < 0.05). In contrast, CD3(+) and CD8(+)CD28(+)cells were significantly lower in MBC patients (P < 0.0001, P = 0.045, respectively). MBC patients had elevated levels of immunosuppressive cytokines IL-6 and IL-10. Patients with elevated CD8(+)CD28(-) and CD4(+)CD25(+) cells showed increased levels of IL-6, and only patients with elevated CD8(+)CD28(-) had decreased interferon-γ. Univariate analysis indicated increased CD3(+)CD4(+) or CD8(+)CD28(+)correlated with prolonged progression-free survival (PFS), while elevated CD8(+)CD28(-)associated with shorten PFS. The percent of CD8(+)CD28(-) T lymphocytes is an independent predictor for PFS through multivariate analysis. CONCLUSIONS This study suggests that progressive elevated levels of CD8(+)CD28(-) suppressor T lymphocytes represent a novel independent predictor of PFS during post-chemotherapy follow-up.
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Affiliation(s)
- Guohong Song
- Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, 52 Fucheng Rd, Beijing, 100142 China
| | - Xiaoli Wang
- Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, 52 Fucheng Rd, Beijing, 100142 China
- Capital Medical University Cancer Center, Beijing Shijitan Hospital, 10 TieyiRoad, Beijing, 100038 China
| | - Jun Jia
- Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, 52 Fucheng Rd, Beijing, 100142 China
| | - Yanhua Yuan
- Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, 52 Fucheng Rd, Beijing, 100142 China
| | - Fengling Wan
- Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, 52 Fucheng Rd, Beijing, 100142 China
| | - Xinna Zhou
- Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, 52 Fucheng Rd, Beijing, 100142 China
- Capital Medical University Cancer Center, Beijing Shijitan Hospital, 10 TieyiRoad, Beijing, 100038 China
| | - Huabing Yang
- Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, 52 Fucheng Rd, Beijing, 100142 China
- Capital Medical University Cancer Center, Beijing Shijitan Hospital, 10 TieyiRoad, Beijing, 100038 China
| | - Jun Ren
- Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, 52 Fucheng Rd, Beijing, 100142 China
- Capital Medical University Cancer Center, Beijing Shijitan Hospital, 10 TieyiRoad, Beijing, 100038 China
| | - Jiezhun Gu
- Duke Clinical Research Institute, Duke University Medical Center, Durham, NC 27710 USA
| | - Herbert Kim Lyerly
- Department of Surgery, Duke University Medical Center, 571 Research Drive, Suite 433, Box 2606, Durham, NC 27710 USA
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8
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Buchwald ZS, Kiesel JR, DiPaolo R, Pagadala MS, Aurora R. Osteoclast activated FoxP3+ CD8+ T-cells suppress bone resorption in vitro. PLoS One 2012; 7:e38199. [PMID: 22701612 PMCID: PMC3368916 DOI: 10.1371/journal.pone.0038199] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 05/03/2012] [Indexed: 12/17/2022] Open
Abstract
Background Osteoclasts are the body’s sole bone resorbing cells. Cytokines produced by pro-inflammatory effector T-cells (TEFF) increase bone resorption by osteoclasts. Prolonged exposure to the TEFF produced cytokines leads to bone erosion diseases such as osteoporosis and rheumatoid arthritis. The crosstalk between T-cells and osteoclasts has been termed osteoimmunology. We have previously shown that under non-inflammatory conditions, murine osteoclasts can recruit naïve CD8 T-cells and activate these T-cells to induce CD25 and FoxP3 (TcREG). The activation of CD8 T-cells by osteoclasts also induced the cytokines IL-2, IL-6, IL-10 and IFN-γ. Individually, these cytokines can activate or suppress osteoclast resorption. Principal Findings To determine the net effect of TcREG on osteoclast activity we used a number of in vitro assays. We found that TcREG can potently and directly suppress bone resorption by osteoclasts. TcREG could suppress osteoclast differentiation and resorption by mature osteoclasts, but did not affect their survival. Additionally, we showed that TcREG suppress cytoskeletal reorganization in mature osteoclasts. Whereas induction of TcREG by osteoclasts is antigen-dependent, suppression of osteoclasts by TcREG does not require antigen or re-stimulation. We demonstrated that antibody blockade of IL-6, IL-10 or IFN-γ relieved suppression. The suppression did not require direct contact between the TcREG and osteoclasts. Significance We have determined that osteoclast-induced TcREG can suppress osteoclast activity, forming a negative feedback system. As the CD8 T-cells are activated in the absence of inflammatory signals, these observations suggest that this regulatory loop may play a role in regulating skeletal homeostasis. Our results provide the first documentation of suppression of osteoclast activity by CD8 regulatory T-cells and thus, extend the purview of osteoimmunology.
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Affiliation(s)
- Zachary S. Buchwald
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Jennifer R. Kiesel
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Richard DiPaolo
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Meghana S. Pagadala
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Rajeev Aurora
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
- * E-mail:
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Hagness M, Henjum K, Landskron J, Brudvik KW, Bjørnbeth BA, Foss A, Taskén K, Aandahl EM. Kinetics and Activation Requirements of Contact-Dependent Immune Suppression by Human Regulatory T Cells. THE JOURNAL OF IMMUNOLOGY 2012; 188:5459-66. [DOI: 10.4049/jimmunol.1101367] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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10
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Li J, Huang ZF, Xiong G, Mo HY, Qiu F, Mai HQ, Chen QY, He J, Chen SP, Zheng LM, Qian CN, Zeng YX. Distribution, characterization, and induction of CD8+ regulatory T cells and IL-17-producing CD8+ T cells in nasopharyngeal carcinoma. J Transl Med 2011; 9:189. [PMID: 22051182 PMCID: PMC3223152 DOI: 10.1186/1479-5876-9-189] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Accepted: 11/04/2011] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND CD8+ effector cells often have an antitumor function in patients with cancer. However, CD8+Foxp3+ regulatory T cells (Tcregs) and interleukin (IL)-17-producing CD8+ T cells (Tc17 cells) also derive from the CD8+ T cell lineage. Their role in the antitumor response remains largely unknown. In the present study, we aimed to investigate the distribution, characterization, and generation of CD8+ Tcregs and Tc17 cells in NPC patients. METHODS Peripheral blood and tumor biopsy tissues from 21 newly diagnosed patients with nasopharyngeal carcinoma (NPC) were collected, along with peripheral blood from 21 healthy donors. The biological characteristics of Tcregs and Tc17 cells from blood and tumor tissues were examined by intracellular staining, tetramer staining and fluorescence-activated cell sorting (FACS) analysis. The suppressive function of Tcregs was investigated using a proliferation assay that involved co-culture of sorted CD8+CD25+ T cells with naïve CD4+ T cells in vitro. RESULTS We observed an increased prevalence of Tcregs and Tc17 cells among tumor-infiltrating lymphocytes (TILs) and different distribution among peripheral blood mononuclear cells (PBMCs) in NPC patients. Cytokine profiles showed that the Tcregs expressed a high level of IL-10 and low level of transforming growth factor β, whereas Tc17 cells expressed a high level of tumor necrosis factor α. Interestingly, both subsets expressed a high level of interferon γ in TILs, and the Tcregs suppressed naïve CD4+ T cell proliferation by a cell contact-dependent mechanism in vitro. Moreover, we demonstrated the existence of Epstein-Barr virus latent membrane protein (LMP) 1 and LMP2 antigen-specific Tcregs in NPC. CONCLUSIONS Our data provide new insights into the composition and function of CD8+ T-cell subsets in NPC, which may have an important influence on NPC immunotherapy.
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Affiliation(s)
- Jiang Li
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China.
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Jadidi-Niaragh F, Mirshafiey A. Regulatory T-cell as orchestra leader in immunosuppression process of multiple sclerosis. Immunopharmacol Immunotoxicol 2011; 33:545-67. [DOI: 10.3109/08923973.2010.513391] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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12
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