1
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Lin Y, Huang S, Qi Y, Xie L, Jiang J, Li H, Chen Z. PSGL-1 is a novel tumor microenvironment prognostic biomarker with cervical high-grade squamous lesions and more. Front Oncol 2023; 13:1052201. [PMID: 36969026 PMCID: PMC10030516 DOI: 10.3389/fonc.2023.1052201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 02/14/2023] [Indexed: 03/11/2023] Open
Abstract
BackgroundMacrophages secrete many cytokines and chemokines, which can provoke either an anti-tumor or pro-tumor immune response. P-selectin glycoprotein ligand-1 (PSGL-1) is expressed in macrophages and plays a vital role in synergizing for a more robust anti-tumor response. However, there are few studies about PSGL-1 expression status and clinical value of biological function in cervical cancer.MethodsIn this study, 565 participants were enrolled. PSGL-1 mRNA was detected by real-time quantitative PCR (qPCR) with cervical cytology specimens. The relationship between PSGL-1 and cervical intraepithelial neoplasia in two grades and more (CIN2+) was analyzed, and the optimal cut-off values of PSGL-1 to predict CIN2+ were calculated. In addition, the clinical significance of PSGL-1 in cervical cancer was determined by Kaplan-Meier Cox regression based on the database.ResultsThe mean PSGL-1 increased significantly with cervical lesion development, especially compared with CIN2+ (p<0.05). Moreover, the expression of PSGL-1 increased significantly in HPV-16/18 positive and HPV-18 positive, but not in HPV-16 positive and other HR-HPV positive. And then, it demonstrated that the area under the receiver operating characteristic curve (AUC) of PSGL-1 was 0.820, and an optimal cut-off 0.245. Furthermore, the PSGL-1 had the highest odds ratio and highest OR (OR= 8.707; 95% CI (.371-19.321)) for the detection of CIN 2+. In addition, our result also indicated that higher PSGL-1 expression was significantly related to a better prognosis in cervical cancer due to immune cell infiltration.ConclusionsPSGL-1≥0.245 in cervical cytology specimens is a new auxiliary biomarker of CIN2+, and it may be a promising prognosis predictor and potential immunotherapy target linked with immune infiltration of cervical cancer.
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Affiliation(s)
- Yingying Lin
- Department of Healthcare, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Shan Huang
- Department of Traditional Chinese Medicine, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Yuanjie Qi
- Department of Gynecologic, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Li Xie
- Department of Gynecologic, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Junying Jiang
- Department of Gynecologic, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Hua Li
- Department of Gynecologic, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
- *Correspondence: Zhiwei Chen, ; Hua Li,
| | - Zhiwei Chen
- Department of Gynecologic, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
- *Correspondence: Zhiwei Chen, ; Hua Li,
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2
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Yang H, Qi G, Dong H, Liu Z, Ma M, Liu P. Identification of Potential Serum Protein Biomarkers in Thymoma with Myasthenia Gravis After Docetaxel Treatment. Neurol Ther 2023; 12:559-570. [PMID: 36786935 PMCID: PMC10043105 DOI: 10.1007/s40120-023-00442-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/23/2023] [Indexed: 02/15/2023] Open
Abstract
INTRODUCTION Myasthenia gravis (MG) is a devastating acquired autoimmune disease that can seriously affect the patient's quality of life. It is also a common complication of thymoma. Previous studies have shown that docetaxel alleviates myasthenic symptoms in thymoma with MG (TMG). However, little is known about the protein expression profiles and biomarkers for efficacy after docetaxel treatment. METHODS We recruited 9 healthy controls and 30 patients with TMG for the serum proteomics study with data-independent acquisition (DIA) technology. We further recruited additional 30 patients for the key protein validation by enzyme-linked immunosorbent assay (ELISA). RESULTS We identified 43 proteins by trend analysis and analyzed the interaction between these proteins and MG pathogenic proteins from the DisGNET database and the correlation analysis with clinical data of patients with TMG. Among these, KRAS and SELP were screened out and validated. KRAS and SELP increased in patients with TMG and decreased significantly after docetaxel treatment. CONCLUSIONS Our study revealed that the serum proteins were differentially expressed after docetaxel treatment, suggesting their important role in patients with TMG, as well as the critical role of KRAS and SELP as biomarkers in evaluating the efficacy of docetaxel treatment.
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Affiliation(s)
- Hongxia Yang
- Center of Treatment of Myasthenia Gravis, People's Hospital of Shijiazhuang Affiliated to Hebei Medical University, 365 Jianhua Nan Street, Shijiazhuang, Hebei, China.,Hebei Provincial Clinical Research Center for Myasthenia Gravis, Shijiazhuang, China
| | - Guoyan Qi
- Center of Treatment of Myasthenia Gravis, People's Hospital of Shijiazhuang Affiliated to Hebei Medical University, 365 Jianhua Nan Street, Shijiazhuang, Hebei, China. .,Hebei Provincial Key Laboratory of Myasthenia Gravis, Shijiazhuang, China. .,Hebei Provincial Clinical Research Center for Myasthenia Gravis, Shijiazhuang, China.
| | - Huimin Dong
- Center of Treatment of Myasthenia Gravis, People's Hospital of Shijiazhuang Affiliated to Hebei Medical University, 365 Jianhua Nan Street, Shijiazhuang, Hebei, China
| | - Ze Liu
- Center of Treatment of Myasthenia Gravis, People's Hospital of Shijiazhuang Affiliated to Hebei Medical University, 365 Jianhua Nan Street, Shijiazhuang, Hebei, China.,Hebei Provincial Key Laboratory of Myasthenia Gravis, Shijiazhuang, China
| | - Mei Ma
- Center of Treatment of Myasthenia Gravis, People's Hospital of Shijiazhuang Affiliated to Hebei Medical University, 365 Jianhua Nan Street, Shijiazhuang, Hebei, China
| | - Peng Liu
- Center of Treatment of Myasthenia Gravis, People's Hospital of Shijiazhuang Affiliated to Hebei Medical University, 365 Jianhua Nan Street, Shijiazhuang, Hebei, China.,Hebei Provincial Key Laboratory of Myasthenia Gravis, Shijiazhuang, China
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3
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Burnie J, Persaud AT, Thaya L, Liu Q, Miao H, Grabinsky S, Norouzi V, Lusso P, Tang VA, Guzzo C. P-selectin glycoprotein ligand-1 (PSGL-1/CD162) is incorporated into clinical HIV-1 isolates and can mediate virus capture and subsequent transfer to permissive cells. Retrovirology 2022; 19:9. [PMID: 35597982 PMCID: PMC9123692 DOI: 10.1186/s12977-022-00593-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 04/21/2022] [Indexed: 11/16/2022] Open
Abstract
Background P-selectin glycoprotein ligand-1 (PSGL-1/CD162) has been studied extensively for its role in mediating leukocyte rolling through interactions with its cognate receptor, P-selectin. Recently, PSGL-1 was identified as a novel HIV-1 host restriction factor, particularly when expressed at high levels in the HIV envelope. Importantly, while the potent antiviral activity of PSGL-1 has been clearly demonstrated in various complementary model systems, the breadth of PSGL-1 incorporation across genetically diverse viral isolates and clinical isolates has yet to be described. Additionally, the biological activity of virion-incorporated PSGL-1 has also yet to be shown. Results Herein we assessed the levels of PSGL-1 on viruses produced through transfection with various amounts of PSGL-1 plasmid DNA (0–250 ng), compared to levels of PSGL-1 on viruses produced through infection of T cell lines and primary PBMC. We found that very low levels of PSGL-1 plasmid DNA (< 2.5 ng/well) were necessary to generate virus models that could closely mirror the phenotype of viruses produced via infection of T cells and PBMC. Unique to this study, we show that PSGL-1 is incorporated in a broad range of HIV-1 and SIV isolates and that virions with incorporated PSGL-1 are detectable in plasma from viremic HIV-1-infected individuals, corroborating the relevance of PSGL-1 in natural infection. Additionally, we show that PSGL-1 on viruses can bind its cognate selectin receptors, P-, E-, and L-selectins. Finally, we show viruses with endogenous levels of PSGL-1 can be captured by P-selectin and transferred to HIV-permissive bystander cells, highlighting a novel role for PSGL-1 in HIV-1 infection. Notably, viruses which contained high levels of PSGL-1 were noninfectious in our hands, in line with previous findings reporting the potent antiviral activity of PSGL-1. Conclusions Our results indicate that levels of PSGL-1 incorporation into virions can vary widely among model systems tested, and that careful tailoring of plasmid levels is required to recapitulate physiological systems when using pseudovirus models. Taken together, our data suggest that PSGL-1 may play diverse roles in the physiology of HIV-1 infection, particularly due to the functionally active state of PSGL-1 on virion surfaces and the breadth of PSGL-1 incorporation among a wide range of viral isolates. Supplementary Information The online version contains supplementary material available at 10.1186/s12977-022-00593-5.
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Affiliation(s)
- Jonathan Burnie
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada.,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada
| | - Arvin Tejnarine Persaud
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada.,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada
| | - Laxshaginee Thaya
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada.,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada
| | - Qingbo Liu
- Viral Pathogenesis Section, Laboratory of Immunoregulation (LIR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Huiyi Miao
- Viral Pathogenesis Section, Laboratory of Immunoregulation (LIR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Stephen Grabinsky
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
| | - Vanessa Norouzi
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
| | - Paolo Lusso
- Viral Pathogenesis Section, Laboratory of Immunoregulation (LIR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Vera A Tang
- Department of Biochemistry, Microbiology, and Immunology, Faculty of Medicine, Flow Cytometry and Virometry Core Facility, University of Ottawa, Ottawa, ON, Canada
| | - Christina Guzzo
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada. .,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada.
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4
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Reed SG, Ager A. Immune Responses to IAV Infection and the Roles of L-Selectin and ADAM17 in Lymphocyte Homing. Pathogens 2022; 11:pathogens11020150. [PMID: 35215094 PMCID: PMC8878872 DOI: 10.3390/pathogens11020150] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/14/2022] [Accepted: 01/21/2022] [Indexed: 02/04/2023] Open
Abstract
Influenza A virus (IAV) infection is a global public health burden causing up to 650,000 deaths per year. Yearly vaccination programmes and anti-viral drugs currently have limited benefits; therefore, research into IAV is fundamental. Leukocyte trafficking is a crucial process which orchestrates the immune response to infection to protect the host. It involves several homing molecules and receptors on both blood vessels and leukocytes. A key mediator of this process is the transmembrane glycoprotein L-selectin, which binds to vascular addressins on blood vessel endothelial cells. L-selectin classically mediates homing of naïve and central memory lymphocytes to lymph nodes via high endothelial venules (HEVs). Recent studies have found that L-selectin is essential for homing of activated CD8+ T cells to influenza-infected lungs and reduction in virus load. A disintegrin and metalloproteinase 17 (ADAM17) is the primary regulator of cell surface levels of L-selectin. Understanding the mechanisms that regulate these two proteins are central to comprehending recruitment of T cells to sites of IAV infection. This review summarises the immune response to IAV infection in humans and mice and discusses the roles of L-selectin and ADAM17 in T lymphocyte homing during IAV infection.
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Affiliation(s)
| | - Ann Ager
- Correspondence: (S.G.R.); (A.A.)
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5
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Krüppel-like Factor 2 (KLF2) in Immune Cell Migration. Vaccines (Basel) 2021; 9:vaccines9101171. [PMID: 34696279 PMCID: PMC8539188 DOI: 10.3390/vaccines9101171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/27/2021] [Accepted: 10/06/2021] [Indexed: 01/30/2023] Open
Abstract
Krüppel-like factor 2 (KLF2), a transcription factor of the krüppel-like family, is a key regulator of activation, differentiation, and migration processes in various cell types. In this review, we focus on the functional relevance of KLF2 in immune cell migration and homing. We summarize the key functions of KLF2 in the regulation of chemokine receptors and adhesion molecules and discuss the relevance of the KLF2-mediated control of immune cell migration in the context of immune responses, infections, and diseases.
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6
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Zaongo SD, Liu Y, Harypursat V, Song F, Xia H, Ma P, Chen Y. P-Selectin Glycoprotein Ligand 1: A Potential HIV-1 Therapeutic Target. Front Immunol 2021; 12:710121. [PMID: 34434194 PMCID: PMC8380821 DOI: 10.3389/fimmu.2021.710121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 07/28/2021] [Indexed: 01/21/2023] Open
Abstract
Antiretroviral therapy (ART), which is a life-long therapeutic option, remains the only currently effective clinical method to treat HIV-1 infection. However, ART may be toxic to vital organs including the liver, brain, heart, and kidneys, and may result in systemic complications. In this context, to consider HIV-1 restriction factors from the innate immune system to explore novel HIV therapeutics is likely to be a promising investigative strategy. In light of this, P-selectin glycoprotein ligand 1 (PSGL-1) has recently become the object of close scrutiny as a recognized cell adhesion molecule, and has become a major focus of academic study, as researchers believe that PSGL-1 may represent a novel area of interest in the research inquiry into the field of immune checkpoint inhibition. In this article, we review PSGL-1's structure and functions during infection and/or inflammation. We also outline a comprehensive review of its role and potential therapeutic utility during HIV-1 infection as published in contemporary academic literature.
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Affiliation(s)
- Silvere D Zaongo
- Division of Infectious Diseases, Chongqing Public Health Medical Center, Chongqing, China.,Basic Medicine College, Chongqing Medical University, Chongqing, China
| | - Yanqiu Liu
- Division of Infectious Diseases, Chongqing Public Health Medical Center, Chongqing, China
| | - Vijay Harypursat
- Division of Infectious Diseases, Chongqing Public Health Medical Center, Chongqing, China
| | - Fangzhou Song
- Basic Medicine College, Chongqing Medical University, Chongqing, China
| | - Huan Xia
- Department of Infectious Diseases, Tianjin Second People's Hospital, Tianjin, China.,School of Medicine, Nankai University, Tianjin, China
| | - Ping Ma
- Department of Infectious Diseases, Tianjin Second People's Hospital, Tianjin, China.,School of Medicine, Nankai University, Tianjin, China
| | - Yaokai Chen
- Division of Infectious Diseases, Chongqing Public Health Medical Center, Chongqing, China
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7
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Okła K, Farber DL, Zou W. Tissue-resident memory T cells in tumor immunity and immunotherapy. J Exp Med 2021; 218:211911. [PMID: 33755718 PMCID: PMC7992502 DOI: 10.1084/jem.20201605] [Citation(s) in RCA: 95] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/17/2020] [Accepted: 12/03/2020] [Indexed: 12/17/2022] Open
Abstract
Tissue-resident memory T cells (TRM) represent a heterogeneous T cell population with the functionality of both effector and memory T cells. TRM express residence gene signatures. This feature allows them to traffic to, reside in, and potentially patrol peripheral tissues, thereby enforcing an efficient long-term immune-protective role. Recent studies have revealed TRM involvement in tumor immune responses. TRM tumor infiltration correlates with enhanced response to current immunotherapy and is often associated with favorable clinical outcome in patients with cancer. Thus, targeting TRM may lead to enhanced cancer immunotherapy efficacy. Here, we review and discuss recent advances on the nature of TRM in the context of tumor immunity and immunotherapy.
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Affiliation(s)
- Karolina Okła
- Department of Surgery, University of Michigan Rogel Cancer Center, Ann Arbor, MI.,Center of Excellence for Cancer Immunology and Immunotherapy, University of Michigan Rogel Cancer Center, Ann Arbor, MI.,Department of Oncological Gynecology and Gynecology, Medical University of Lublin, Lublin, Poland
| | - Donna L Farber
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, NY.,Department of Surgery, Columbia University Medical Center, New York, NY.,Department of Microbiology and Immunology, Columbia University Medical Center, New York, NY
| | - Weiping Zou
- Department of Surgery, University of Michigan Rogel Cancer Center, Ann Arbor, MI.,Center of Excellence for Cancer Immunology and Immunotherapy, University of Michigan Rogel Cancer Center, Ann Arbor, MI.,Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI.,Graduate Program in Immunology, University of Michigan School of Medicine, Ann Arbor, MI.,Graduate Program in Cancer Biology, University of Michigan School of Medicine, Ann Arbor, MI
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8
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DeRogatis JM, Viramontes KM, Neubert EN, Tinoco R. PSGL-1 Immune Checkpoint Inhibition for CD4 + T Cell Cancer Immunotherapy. Front Immunol 2021; 12:636238. [PMID: 33708224 PMCID: PMC7940186 DOI: 10.3389/fimmu.2021.636238] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/04/2021] [Indexed: 01/15/2023] Open
Abstract
Immune checkpoint inhibition targeting T cells has shown tremendous promise in the treatment of many cancer types and are now standard therapies for patients. While standard therapies have focused on PD-1 and CTLA-4 blockade, additional immune checkpoints have shown promise in promoting anti-tumor immunity. PSGL-1, primarily known for its role in cellular migration, has also been shown to function as a negative regulator of CD4+ T cells in numerous disease settings including cancer. PSGL-1 is highly expressed on T cells and can engage numerous ligands that impact signaling pathways, which may modulate CD4+ T cell differentiation and function. PSGL-1 engagement in the tumor microenvironment may promote CD4+ T cell exhaustion pathways that favor tumor growth. Here we highlight that blocking the PSGL-1 pathway on CD4+ T cells may represent a new cancer therapy approach to eradicate tumors.
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Affiliation(s)
| | | | | | - Roberto Tinoco
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
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9
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Colomb F, Giron LB, Kuri-Cervantes L, Adeniji OS, Ma T, Dweep H, Battivelli E, Verdin E, Palmer CS, Tateno H, Kossenkov AV, Roan NR, Betts MR, Abdel-Mohsen M. Sialyl-Lewis X Glycoantigen Is Enriched on Cells with Persistent HIV Transcription during Therapy. Cell Rep 2020; 32:107991. [PMID: 32755584 PMCID: PMC7432956 DOI: 10.1016/j.celrep.2020.107991] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 05/30/2020] [Accepted: 07/14/2020] [Indexed: 12/30/2022] Open
Abstract
A comprehensive understanding of the phenotype of persistent HIV-infected cells, transcriptionally active and/or transcriptionally inactive, is imperative for developing a cure. The relevance of cell-surface glycosylation to HIV persistence has never been explored. We characterize the relationship between cell-surface glycomic signatures and persistent HIV transcription in vivo. We find that the cell surface of CD4+ T cells actively transcribing HIV, despite suppressive therapy, harbors high levels of fucosylated carbohydrate ligands, including the cell extravasation mediator Sialyl-LewisX (SLeX), compared with HIV-infected transcriptionally inactive cells. These high levels of SLeX are induced by HIV transcription in vitro and are maintained after therapy in vivo. Cells with high-SLeX are enriched with markers associated with HIV susceptibility, signaling pathways that drive HIV transcription, and pathways involved in leukocyte extravasation. We describe a glycomic feature of HIV-infected transcriptionally active cells that not only differentiates them from their transcriptionally inactive counterparts but also may affect their trafficking abilities.
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Affiliation(s)
- Florent Colomb
- The Wistar Institute, Philadelphia, PA 19104, USA; Penn Center for AIDS Research (Penn CFAR), University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Leila B Giron
- The Wistar Institute, Philadelphia, PA 19104, USA; Penn Center for AIDS Research (Penn CFAR), University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Leticia Kuri-Cervantes
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Penn Center for AIDS Research (Penn CFAR), University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Opeyemi S Adeniji
- The Wistar Institute, Philadelphia, PA 19104, USA; Penn Center for AIDS Research (Penn CFAR), University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tongcui Ma
- University of California, San Francisco, San Francisco, CA 94158, USA; Gladstone Institutes, San Francisco, CA 94158, USA
| | - Harsh Dweep
- The Wistar Institute, Philadelphia, PA 19104, USA
| | | | - Eric Verdin
- The Buck Institute for Research on Aging, Novato, CA 94945, USA
| | - Clovis S Palmer
- The Burnet Institute, Melbourne, VIC 3004, Australia; Department of Infectious Diseases, Monash University, Melbourne, VIC 3004, Australia
| | - Hiroaki Tateno
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | | | - Nadia R Roan
- University of California, San Francisco, San Francisco, CA 94158, USA; Gladstone Institutes, San Francisco, CA 94158, USA
| | - Michael R Betts
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Penn Center for AIDS Research (Penn CFAR), University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Mohamed Abdel-Mohsen
- The Wistar Institute, Philadelphia, PA 19104, USA; Penn Center for AIDS Research (Penn CFAR), University of Pennsylvania, Philadelphia, PA 19104, USA.
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10
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Liu Y, Song Y, Zhang S, Diao M, Huang S, Li S, Tan X. PSGL-1 inhibits HIV-1 infection by restricting actin dynamics and sequestering HIV envelope proteins. Cell Discov 2020; 6:53. [PMID: 32802403 PMCID: PMC7400672 DOI: 10.1038/s41421-020-0184-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/18/2020] [Indexed: 01/22/2023] Open
Abstract
PSGL-1 has recently been identified as an HIV restriction factor that inhibits HIV DNA synthesis and more potently, virion infectivity. But the underlying mechanisms of these inhibitions are unknown. Here we show that PSGL-1 directly binds to cellular actin filaments (F-actin) to restrict actin dynamics, which leads to inhibition of HIV DNA synthesis. PSGL-1 is incorporated into nascent virions and restricts actin dynamics in the virions, which partially accounts for the inhibition of virion infectivity. More potently, PSGL-1 inhibits incorporation of Env proteins into nascent virions, causing a loss of envelope spikes on the virions as shown by Cryo-electron microscopy and super-resolution imaging. This loss is associated with a profound defect in viral entry. Mechanistically, PSGL-1 binds gp41 and sequesters gp41 at the plasma membrane, explaining the inhibition of Env incorporation in nascent virions. PSGL-1’s dual anti-HIV mechanisms represent novel strategies of human cells to defend against HIV infection.
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Affiliation(s)
- Ying Liu
- Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, School of Pharmaceutical Sciences, Center for Infectious Disease Research, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Yutong Song
- Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Siyu Zhang
- Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, School of Pharmaceutical Sciences, Center for Infectious Disease Research, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Min Diao
- Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Shanjin Huang
- Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Sai Li
- Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Xu Tan
- Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, School of Pharmaceutical Sciences, Center for Infectious Disease Research, School of Medicine, Tsinghua University, Beijing, 100084, China.
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11
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Dichotomous regulation of group 3 innate lymphoid cells by nongastric Helicobacter species. Proc Natl Acad Sci U S A 2019; 116:24760-24769. [PMID: 31740609 DOI: 10.1073/pnas.1908128116] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Intestinal innate lymphoid cells (ILCs) contribute to the protective immunity and homeostasis of the gut, and the microbiota are critically involved in shaping ILC function. However, the role of the gut microbiota in regulating ILC development and maintenance still remains elusive. Here, we identified opposing effects on ILCs by two Helicobacter species, Helicobacter apodemus and Helicobacter typhlonius, isolated from immunocompromised mice. We demonstrated that the introduction of both Helicobacter species activated ILCs and induced gut inflammation; however, these Helicobacter species negatively regulated RORγt+ group 3 ILCs (ILC3s), especially T-bet+ ILC3s, and diminished their proliferative capacity. Thus, these findings underscore a previously unknown dichotomous regulation of ILC3s by Helicobacter species, and may serve as a model for further investigations to elucidate the host-microbe interactions that critically sustain the maintenance of intestinal ILC3s.
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12
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Chen L, Shen Z. Tissue-resident memory T cells and their biological characteristics in the recurrence of inflammatory skin disorders. Cell Mol Immunol 2019; 17:64-75. [PMID: 31595056 DOI: 10.1038/s41423-019-0291-4] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 08/25/2019] [Indexed: 11/09/2022] Open
Abstract
The skin is the largest organ of the body. The establishment of immunological memory in the skin is a crucial component of the adaptive immune response. Once naive T cells are activated by antigen-presenting cells, a small fraction of them differentiate into precursor memory T cells. These precursor cells ultimately develop into several subsets of memory T cells, including central memory T (TCM) cells, effector memory T (TEM) cells, and tissue resident memory T (TRM) cells. TRM cells have a unique transcriptional profile, and their most striking characteristics are their long-term survival (longevity) and low migration in peripheral tissues, including the skin. Under physiological conditions, TRM cells that reside in the skin can respond rapidly to pathogenic challenges. However, there is emerging evidence to support the vital role of TRM cells in the recurrence of chronic inflammatory skin disorders, including psoriasis, vitiligo, and fixed drug eruption, under pathological or uncontrolled conditions. Clarifying and characterizing the mechanisms that are involved in skin TRM cells will help provide promising strategies for reducing the frequency and magnitude of skin inflammation recurrence. Here, we discuss recent insights into the generation, homing, retention, and survival of TRM cells and share our perspectives on the biological characteristics of TRM cells in the recurrence of inflammatory skin disorders.
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Affiliation(s)
- Ling Chen
- Department of Dermatology, Daping Hospital, Army Medical University, Chongqing, 400042, China
| | - Zhu Shen
- Department of Dermatology, Institute of Dermatology and Venereology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital; School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610072, China.
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13
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Effector and Regulatory T Cells Roll at High Shear Stress by Inducible Tether and Sling Formation. Cell Rep 2019; 21:3885-3899. [PMID: 29281835 DOI: 10.1016/j.celrep.2017.11.099] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 10/04/2017] [Accepted: 11/28/2017] [Indexed: 01/07/2023] Open
Abstract
The adaptive immune response involves T cell differentiation and migration to sites of inflammation. T cell trafficking is initiated by rolling on inflamed endothelium. Tethers and slings, discovered in neutrophils, facilitate cell rolling at high shear stress. Here, we demonstrate that the ability to form tethers and slings during rolling is highly inducible in T helper 1 (Th1), Th17, and regulatory T (Treg) cells but less in Th2 cells. In vivo, endogenous Treg cells rolled stably in cremaster venules at physiological shear stress. Quantitative dynamic footprinting nanoscopy of Th1, Th17, and Treg cells uncovered the formation of multiple tethers per cell. Human Th1 cells also showed tethers and slings. RNA sequencing (RNA-seq) revealed the induction of cell migration and cytoskeletal genes in sling-forming cells. We conclude that differentiated CD4 T cells stabilize rolling by inducible tether and sling formation. These phenotypic changes approximate the adhesion phenotype of neutrophils and support CD4 T cell access to sites of inflammation.
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Rath T, Billmeier U, Ferrazzi F, Vieth M, Ekici A, Neurath MF, Atreya R. Effects of Anti-Integrin Treatment With Vedolizumab on Immune Pathways and Cytokines in Inflammatory Bowel Diseases. Front Immunol 2018; 9:1700. [PMID: 30131801 PMCID: PMC6090141 DOI: 10.3389/fimmu.2018.01700] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 07/10/2018] [Indexed: 12/16/2022] Open
Abstract
Background and aims Despite proven clinical efficacy of vedolizumab (VDZ) for inducing and maintaining remission in patients with Crohn’s disease (CD) and ulcerative colitis (UC), subgroups of patients have no therapeutic benefit from anti-α4β7 integrin therapy with VDZ. Within this study, we aimed to identify genetic, cellular, and immunological mechanisms that define response and failure to VDZ treatment. Methods Intestinal RNA sequencing was performed in UC and CD patients before and at week 14 of VDZ therapy. α4β7 expression on peripheral and mucosal immune cells was assessed by flow cytometry and immunohistochemistry. Cellular modes of VDZ-mediated action were analyzed ex vivo and in VDZ-treated inflammatory bowel disease patients. Results Transcriptome analysis showed an impairment of signaling cascades associated with adhesion, diapedesis, and migration of granulocytes and agranulocytes upon VDZ therapy. In non-remitters to VDZ therapy, a tissue destructive and leukocyte-mediated inflammatory activity with activation of TNF-dependent pathways was present, all of which were inhibited in remitters to VDZ. Clinical remission was associated with a significant reduction of α4β7 expression on Th2 and Th17 polarized mucosal CD4+ T cells at week 14 of VDZ therapy and with significantly higher numbers of α4β7-expressing mucosal cells prior to the initiation of VDZ therapy compared with non-remitters. Conclusion Intestinal α4β7 expression prior to VDZ therapy might represent a biomarker that predicts therapeutic response to subsequent VDZ treatment. Due to high activation of TNF signaling in VDZ non-remitters, anti-TNF treatment might represent a promising therapeutic strategy in VDZ refractory patients.
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Affiliation(s)
- Timo Rath
- Department of Medicine 1, Division of Gastroenterology, Pneumology and Endocrinology, Ludwig Demling Endoscopy Center of Excellence, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Ulrike Billmeier
- Department of Medicine 1, Division of Gastroenterology, Pneumology and Endocrinology, Ludwig Demling Endoscopy Center of Excellence, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Fulvia Ferrazzi
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nuremberg, Erlangen, Germany
| | - Michael Vieth
- Institute of Pathology, Klinikum Bayreuth, Bayreuth, Germany
| | - Arif Ekici
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nuremberg, Erlangen, Germany
| | - Markus F Neurath
- Department of Medicine 1, Division of Gastroenterology, Pneumology and Endocrinology, Ludwig Demling Endoscopy Center of Excellence, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Raja Atreya
- Department of Medicine 1, Division of Gastroenterology, Pneumology and Endocrinology, Ludwig Demling Endoscopy Center of Excellence, University of Erlangen-Nuremberg, Erlangen, Germany
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Abstract
PURPOSE OF REVIEW We review P-selectin glycoprotein ligand-1 (PSGL-1) as a selectin and chemokine-binding adhesion molecule. PSGL-1 is widely studied in neutrophils. Here, we focus on T cells, because PSGL-1 was recently described as a major immunomodulatory molecule during viral infection. PSGL-1 also plays a crucial role in T-cell homeostasis by binding to lymphoid chemokines, and can induce tolerance by enhancing the functions of regulatory T cells. RECENT FINDINGS PSGL-1 was originally described as a leukocyte ligand for P-selectin, but it is actually a ligand for all selectins (P-, L- and E-selectin), binds chemokines, activates integrins and profoundly affects T-cell biology. It has been shown recently that PSGL-1 can modulate T cells during viral infection by acting as a negative regulator for T-cell functions. Absence of PSGL-1 promotes effector CD4 and CD8 T-cell differentiation and prevents T-cell exhaustion. Consistent with this, tumor growth was significantly reduced in PSGL-1-deficient mice because of an enhanced number of effector T cells together with reduced levels of inhibitory receptors that induce T-cell exhaustion. SUMMARY PSGL-1 is the best-studied selectin ligand and has become a posterchild of versatility in leukocyte adhesion, inflammation and immunology. The direct involvement of PSGL-1 in T-cell biology suggests that it might be a drug target. Indeed, PSGL-1 has been tested in some clinical trials and recently, PSGL-1 blockers were proposed as a potential cotherapy in cancer immunotherapy.
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Hobbs SJ, Nolz JC. Regulation of T Cell Trafficking by Enzymatic Synthesis of O-Glycans. Front Immunol 2017; 8:600. [PMID: 28596771 PMCID: PMC5442166 DOI: 10.3389/fimmu.2017.00600] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/08/2017] [Indexed: 12/27/2022] Open
Abstract
Selectins constitute a family of oligosaccharide binding proteins that play critical roles in regulating the trafficking of leukocytes. In T cells, L-selectin (CD62L) controls the capacity for naive and memory T cells to actively survey peripheral lymph nodes, whereas P- and E-selectin capture activated T cells on inflamed vascular endothelium to initiate extravasation into non-lymphoid tissues. The capacity for T cells to interact with all of these selectins is dependent on the enzymatic synthesis of complex O-glycans, and thus, this protein modification plays an indispensable role in regulating the distribution and homing of both naive and previously activated T cells in vivo. In contrast to neutrophils, O-glycan synthesis is highly dynamic in T cell populations and is largely controlled by extracellular stimuli such as antigen recognition or signaling though cytokine receptors. Herein, we review the basic principles of enzymatic synthesis of complex O-glycans, discuss tools and reagents for studying this type of protein modification and highlight our current understanding of how O-glycan synthesis is regulated and subsequently impacts the trafficking potential of diverse T cell populations.
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Affiliation(s)
- Samuel J Hobbs
- Department of Molecular Microbiology and Immunology, Oregon Health and Science University, Portland, OR, United States
| | - Jeffrey C Nolz
- Department of Molecular Microbiology and Immunology, Oregon Health and Science University, Portland, OR, United States.,Department of Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, OR, United States.,Department of Radiation Medicine, Oregon Health and Science University, Portland, OR, United States
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17
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PSGL-1: A New Player in the Immune Checkpoint Landscape. Trends Immunol 2017; 38:323-335. [PMID: 28262471 DOI: 10.1016/j.it.2017.02.002] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/02/2017] [Accepted: 02/08/2017] [Indexed: 02/07/2023]
Abstract
P-selectin glycoprotein ligand-1 (PSGL-1) has long been studied as an adhesion molecule involved in immune cell trafficking and is recognized as a regulator of many facets of immune responses by myeloid cells. PSGL-1 also regulates T cell migration during homeostasis and inflammatory settings. However, recent findings indicate that PSGL-1 can also negatively regulate T cell function. Because T cell differentiation is finely tuned by multiple positive and negative regulatory signals that appropriately scale the magnitude of the immune response, PSGL-1 has emerged as an important checkpoint during this process. We summarize what is known regarding PSGL-1 structure and function and highlight how it may act as an immune checkpoint inhibitor in T cells.
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18
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Marshall NB, Vong AM, Devarajan P, Brauner MD, Kuang Y, Nayar R, Schutten EA, Castonguay CH, Berg LJ, Nutt SL, Swain SL. NKG2C/E Marks the Unique Cytotoxic CD4 T Cell Subset, ThCTL, Generated by Influenza Infection. THE JOURNAL OF IMMUNOLOGY 2016; 198:1142-1155. [PMID: 28031335 DOI: 10.4049/jimmunol.1601297] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 12/05/2016] [Indexed: 01/22/2023]
Abstract
CD4 T cells can differentiate into multiple effector subsets, including ThCTL that mediate MHC class II-restricted cytotoxicity. Although CD4 T cell-mediated cytotoxicity has been reported in multiple viral infections, their characteristics and the factors regulating their generation are unclear, in part due to a lack of a signature marker. We show in this article that, in mice, NKG2C/E identifies the ThCTL that develop in the lung during influenza A virus infection. ThCTL express the NKG2X/CD94 complex, in particular the NKG2C/E isoforms. NKG2C/E+ ThCTL are part of the lung CD4 effector population, and they mediate influenza A virus-specific cytotoxic activity. The phenotype of NKG2C/E+ ThCTL indicates they are highly activated effectors expressing high levels of binding to P-selectin, T-bet, and Blimp-1, and that more of them secrete IFN-γ and readily degranulate than non-ThCTL. ThCTL also express more cytotoxicity-associated genes including perforin and granzymes, and fewer genes associated with recirculation and memory. They are found only at the site of infection and not in other peripheral sites. These data suggest ThCTL are marked by the expression of NKG2C/E and represent a unique CD4 effector population specialized for cytotoxicity.
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Affiliation(s)
- Nikki B Marshall
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Allen M Vong
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | | | - Matthew D Brauner
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Yi Kuang
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Ribhu Nayar
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Elizabeth A Schutten
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Catherine H Castonguay
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Leslie J Berg
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Stephen L Nutt
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia; and.,Department of Medical Biology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Susan L Swain
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605;
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19
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Fischer A, Zundler S, Atreya R, Rath T, Voskens C, Hirschmann S, López-Posadas R, Watson A, Becker C, Schuler G, Neufert C, Atreya I, Neurath MF. Differential effects of α4β7 and GPR15 on homing of effector and regulatory T cells from patients with UC to the inflamed gut in vivo. Gut 2016; 65. [PMID: 26209553 PMCID: PMC5036234 DOI: 10.1136/gutjnl-2015-310022] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Gut homing of lymphocytes via adhesion molecules has recently emerged as new target for therapy in IBDs. We aimed to analyse the in vivo homing of effector (Teff) and regulatory (Treg) T cells to the inflamed gut via α4β7 and G protein receptor GPR15. DESIGN We assessed the expression of homing receptors on T cells in peripheral blood and inflamed mucosa. We studied the migration pattern and homing of Teff and Treg cells to the inflamed gut using intravital confocal microscopy and FACS in a humanised mouse model in dextran sodium sulfate-treated NSG (NOD.Cg-Prkdcscid-Il2rgtm1Wjl/SzJ) mice. RESULTS Expression of GPR15 and α4β7 was significantly increased on Treg rather than Teff cells in peripheral blood of patients with UC as compared with Crohn's disease and controls. In vivo analysis in a humanised mouse model showed augmented gut homing of UC Treg cells as compared with controls. Moreover, suppression of UC (but not control) Teff and Treg cell homing was noted upon treatment with the α4β7 antibody vedolizumab. In contrast, siRNA blockade of GPR15 had only effects on homing of Teff cells but did not affect Treg homing in UC. Clinical vedolizumab treatment was associated with marked expansion of UC Treg cells in peripheral blood. CONCLUSIONS α4β7 rather than GPR15 is crucial for increased colonic homing of UC Treg cells in vivo, while both receptors control UC Teff cell homing. Vedolizumab treatment impairs homing of UC Treg cells leading to their accumulation in peripheral blood with subsequent suppression of systemic Teff cell expansion.
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Affiliation(s)
- Anika Fischer
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Sebastian Zundler
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Raja Atreya
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Timo Rath
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Caroline Voskens
- Department of Dermatology, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Simon Hirschmann
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Rocío López-Posadas
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Alastair Watson
- Norwich Medical School, University of East Anglia, Norwich, UK
| | - Christoph Becker
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Gerold Schuler
- Department of Dermatology, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Clemens Neufert
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Imke Atreya
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
| | - Markus F Neurath
- Department of Medicine 1, University of Erlangen-Nuremberg, Kussmaul Campus for Medical Research & Translational Research Center, Erlangen, Germany
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20
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Chen J, Haller CA, Chaikof EL. Immune checkpoint regulator: a new assignment proposed for the classic adhesion molecule P-selectin glycoprotein ligand-1. Transl Cancer Res 2016; 5:S668-S671. [PMID: 30613475 DOI: 10.21037/tcr.2016.10.05] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jiaxuan Chen
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.,Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA 02115, USA
| | - Carolyn A Haller
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.,Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA 02115, USA
| | - Elliot L Chaikof
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.,Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA 02115, USA
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21
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Abstract
BACKGROUND Immune rejection continues to threaten all tissue transplants. Here we sought to determine whether platelet (P)- and endothelial (E)-selectin mediate T cell recruitment in corneal transplantation and whether their blockade can reduce T cell graft infiltration and improve long-term corneal allograft survival. METHODS In a murine model of allogeneic corneal transplantation, we used PCR and immunohistochemistry to investigate expression of P- and E-selectin in rejected versus accepted allografts and lymph node flow cytometry to assess expression of selectin ligands by effector T cells. Using P- and E-selectin neutralizing antibodies, we evaluated the effect of blockade on CD4 T cell recruitment, as well as the effect of anti-E-selectin on long-term allograft survival. RESULTS The P- (93.3-fold, P < 0.05) and E-selectin (17.1-fold, P < 0.005) are upregulated in rejected versus accepted allogeneic transplants. Type 1 T helper cells from hosts with accepted and rejected grafts express high levels of P-selectin glycoprotein ligand 1 and glycosylated CD43. In vivo blockade of P (0.47 ± 0.03, P < 0.05) and E selectin (0.49 ± 0.1, P < 0.05) reduced the number of recruited T cells compared with IgG control (0.98 ± 0.1). Anti-E-selectin reduced the number of mature antigen-presenting cells trafficking to lymphoid tissue compared with control (6.96 ± 0.9 vs 12.67 ± 0.5, P < 0.05). Anti-E-selectin treatment delayed graft rejection and increased survival compared with control, although this difference did not reach statistical significance. CONCLUSIONS In a model of corneal transplantation, P- and E-selectin mediate T cell recruitment to the graft, E-selectin mediates APC trafficking to lymphoid tissue, and blockade of E-selectin has a modest effect on improving long-term graft survival.
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22
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Tinoco R, Carrette F, Barraza ML, Otero DC, Magaña J, Bosenberg MW, Swain SL, Bradley LM. PSGL-1 Is an Immune Checkpoint Regulator that Promotes T Cell Exhaustion. Immunity 2016; 44:1190-203. [PMID: 27192578 PMCID: PMC4908967 DOI: 10.1016/j.immuni.2016.04.015] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 12/16/2015] [Accepted: 01/26/2016] [Indexed: 12/30/2022]
Abstract
Chronic viruses and cancers thwart immune responses in humans by inducing T cell dysfunction. Using a murine chronic virus that models human infections, we investigated the function of the adhesion molecule, P-selectin glycoprotein ligand-1 (PSGL-1), that is upregulated on responding T cells. PSGL-1-deficient mice cleared the virus due to increased intrinsic survival of multifunctional effector T cells that had downregulated PD-1 as well as other inhibitory receptors. Notably, this response resulted in CD4(+)-T-cell-dependent immunopathology. Mechanistically, PSGL-1 ligation on exhausted CD8(+) T cells inhibited T cell receptor (TCR) and interleukin-2 (IL-2) signaling and upregulated PD-1, leading to diminished survival with TCR stimulation. In models of melanoma cancer in which T cell dysfunction occurs, PSGL-1 deficiency led to PD-1 downregulation, improved T cell responses, and tumor control. Thus, PSGL-1 plays a fundamental role in balancing viral control and immunopathology and also functions to regulate T cell responses in the tumor microenvironment.
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Affiliation(s)
- Roberto Tinoco
- Infectious and Inflammatory Disease Center and NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Research Institute, La Jolla, CA 92037, USA; Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Florent Carrette
- Infectious and Inflammatory Disease Center and NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Research Institute, La Jolla, CA 92037, USA
| | - Monique L Barraza
- Infectious and Inflammatory Disease Center and NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Research Institute, La Jolla, CA 92037, USA
| | - Dennis C Otero
- Infectious and Inflammatory Disease Center and NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Research Institute, La Jolla, CA 92037, USA
| | - Jonathan Magaña
- Infectious and Inflammatory Disease Center and NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Research Institute, La Jolla, CA 92037, USA
| | - Marcus W Bosenberg
- Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Susan L Swain
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Linda M Bradley
- Infectious and Inflammatory Disease Center and NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Research Institute, La Jolla, CA 92037, USA.
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23
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Ebel ME, Awe O, Kaplan MH, Kansas GS. Diverse inflammatory cytokines induce selectin ligand expression on murine CD4 T cells via p38α MAPK. THE JOURNAL OF IMMUNOLOGY 2015; 194:5781-8. [PMID: 25941329 DOI: 10.4049/jimmunol.1500485] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 04/02/2015] [Indexed: 01/03/2023]
Abstract
Selectins are glycan-binding adhesion molecules that mediate the initial steps of leukocyte recognition of endothelium. Cytokines control numerous aspects of CD4 Th cell differentiation, but how cytokines control the induction of ligands for E- and P-selectin on Th cell subsets remains poorly understood. Among 20 cytokines that affect Th cell differentiation, we identified six that induce expression of selectin ligands on murine CD4 T cells above the low levels associated with TCR engagement: IL-12, IL-18, IL-27, IL-9, IL-25, and TGF-β1. Collectively, these six cytokines could potentially account for selectin ligand expression on all of the currently defined nonsessile Th cell lineages, including Th1, Th2, Th9, and Th17 cells, as well as regulatory T cells. Induction of selectin ligand expression by each of these six cytokines was almost completely inhibited by pharmacologic inhibition of p38 MAPK, but not other MAPKs, or by conditional genetic deletion of p38α MAPK. Analysis of the expression of key glycosyltransferase genes revealed that p38α signaling was selectively required for induction of Fut7 and Gcnt1 but not for the induction of St3gal4 or St3gal6. Constitutively active MKK6, an immediate upstream activator of p38 MAPK, induced selectin ligand expression equivalent to that of cytokines, and this induction was completely dependent on the expression of p38α. Our results identify the repertoire of cytokines responsible for selectin ligand induction on CD4 T cells and provide a mechanistic link between Th cell development and T cell migration.
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Affiliation(s)
- Mark E Ebel
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Olufolakemi Awe
- Department of Pediatrics, Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202; and Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Mark H Kaplan
- Department of Pediatrics, Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202; and Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Geoffrey S Kansas
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611;
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24
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Regulation of T cell trafficking by the T cell immunoglobulin and mucin domain 1 glycoprotein. Trends Mol Med 2014; 20:675-84. [DOI: 10.1016/j.molmed.2014.10.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 09/30/2014] [Accepted: 10/13/2014] [Indexed: 12/30/2022]
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25
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Allocca M, Fiorino G, Vermeire S, Reinisch W, Cataldi F, Danese S. Blockade of lymphocyte trafficking in inflammatory bowel diseases therapy: importance of specificity of endothelial target. Expert Rev Clin Immunol 2014; 10:885-95. [DOI: 10.1586/1744666x.2014.917962] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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26
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Baaten BJG, Cooper AM, Swain SL, Bradley LM. Location, location, location: the impact of migratory heterogeneity on T cell function. Front Immunol 2013; 4:311. [PMID: 24115949 PMCID: PMC3792444 DOI: 10.3389/fimmu.2013.00311] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 09/16/2013] [Indexed: 01/13/2023] Open
Abstract
T cell migration is crucial for an effective adaptive immune response to invading pathogens. Naive and memory T cells encounter pathogen antigens, become activated, and differentiate into effector cells in secondary lymphoid tissues, and then migrate to the site(s) of infection where they exert effector activities that control and eliminate pathogens. To achieve activation, efficient effector function, and good memory formation, T cells must traffic between lymphoid and non-lymphoid tissues within the body. This complex process is facilitated by chemokine receptors, selectins, CD44, and integrins that mediate the interactions of T cells with the environment. The expression patterns of these migration receptors (MR) dictate the tissues into which the effector T cells migrate and enable them to occupy specific niches within the tissue. While MR have been considered primarily to facilitate cell movement, we highlight how the heterogeneity of signaling through these receptors influences the function and fate of T cells in situ. We explore what drives MR expression heterogeneity, how this affects migration, and how this impacts T cell effector function and memory formation.
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Affiliation(s)
- Bas J G Baaten
- Infectious and Inflammatory Diseases Center, Sanford-Burnham Medical Research Institute , La Jolla, CA , USA
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Tufail S, Badrealam KF, Sherwani A, Gupta UD, Owais M. Tissue specific heterogeneity in effector immune cell response. Front Immunol 2013; 4:254. [PMID: 23986763 PMCID: PMC3753596 DOI: 10.3389/fimmu.2013.00254] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 08/12/2013] [Indexed: 12/17/2022] Open
Abstract
Post pathogen invasion, migration of effector T-cell subsets to specific tissue locations is of prime importance for generation of robust immune response. Effector T cells are imprinted with distinct “homing codes” (adhesion molecules and chemokine receptors) during activation which regulate their targeted trafficking to specific tissues. Internal cues in the lymph node microenvironment along with external stimuli from food (vitamin A) and sunlight (vitamin D3) prime dendritic cells, imprinting them to play centre stage in the induction of tissue tropism in effector T cells. B cells as well, in a manner similar to effector T cells, exhibit tissue-tropic migration. In this review, we have focused on the factors regulating the generation and migration of effector T cells to various tissues along with giving an overview of tissue tropism in B cells.
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Affiliation(s)
- Saba Tufail
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University , Aligarh , India
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Regulation and migratory role of P-selectin ligands during intestinal inflammation. PLoS One 2013; 8:e62055. [PMID: 23630623 PMCID: PMC3632518 DOI: 10.1371/journal.pone.0062055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 03/17/2013] [Indexed: 11/19/2022] Open
Abstract
Dendritic cells from mesenteric lymph nodes (MLN) can convert retinal to retinoic acid (RA), which promotes induction of the gut-specific homing receptor α4β7. In contrast, priming within peripheral lymph nodes leads to upregulation of E- and P-selectin ligands (E- and P-lig). Apart from its α4β7 promoting effect, RA was shown to suppress E- and P-lig induction in vitro. However, enhanced frequencies of P-lig(+) CD4(+) T cells were reported during intestinal inflammation. To understand this contradiction, we first determined whether location of intestinal inflammation, that is, ileitis or colitis, affects P-lig induction. Both conditions promoted P-lig expression on CD4(+) T cells; however, P-lig expressed on T cells facilitated Th1 cell recruitment only into the inflamed colon but not into inflamed small intestine induced by oral Toxoplasma gondii infection. A majority of P-lig(+)CD4(+) T cells found within MLN during intestinal inflammation co-expressed α4β7 confirming their activation in the presence of RA. Mesenteric P-lig(+)CD4(+) cells co-expressed the 130 kDa isoform of CD43 which requires activity of core 2 (beta)1,6-N-acetyl-glycosaminyltransferase-I (C2GlcNAcT-I) suggesting that C2GlcNAcT-I contributes to P-lig expression under these conditions. To test whether inflammatory mediators can indeed overrule the inhibitory effect of RA on P-lig expression we stimulated CD4(+) T cells either polyclonal in the presence of IL-12 and IFNγ or by LPS-activated MLN-derived dendritic cells. Both conditions promoted P-lig induction even in the presence of RA. While RA impeded the induction of fucosyltransferase-VII it did not affect IL-12-dependent C2GlcNAcT-I induction suggesting that C2GlcNAcT-I can support P-lig expression even if fucosyltransferase-VII mRNA upregulation is dampened.
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Brown JB, Cheresh P, Zhang Z, Ryu H, Managlia E, Barrett TA. P-selectin glycoprotein ligand-1 is needed for sequential recruitment of T-helper 1 (Th1) and local generation of Th17 T cells in dextran sodium sulfate (DSS) colitis. Inflamm Bowel Dis 2012; 18:323-32. [PMID: 22009715 PMCID: PMC3262920 DOI: 10.1002/ibd.21779] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Activated effector T cells contribute to tissue injury observed in inflammatory bowel disease. T cells are recruited to effector sites after activation in peripheral lymph nodes directs expression of tissue-specific homing receptors. One such mechanism for effector T cell recruitment employs activation-induced fucosylation of P-selectin glycoprotein ligand (PSGL)-1 that mediates binding to endothelial P-selectin. Here we examine the differential role of PSGL-1 in recruiting effector T-cell subsets in colitis. METHODS C57BL/6 wildtype and PSGL-1 mice received 2.5% dextran sodium sulfate (DSS) for 6 days and were euthanized 7 and 14 days after the initiation of DSS. Disease activity was monitored throughout. Histologic colitis scores, colonic CD4+ accumulation, and cytokine production were assessed at days 7 and 14. Recruitment of T-helper (Th) subsets was assessed by enumerating adoptively transferred Th1 or Th17 CD4+ cells 2 days after transfer to DSS-treated mice. RESULTS DSS colitis increases CD4+ T cells in colonic tissue and induces Th1 (interferon gamma [IFN-γ], tumor necrosis factor [TNF]) and Th17 (interleukin [IL]-17, IL-22) cytokines. Loss of PSGL-1 attenuates DSS colitis, decreases colonic CD4+ T cell numbers, and reduces both Th1 and Th17 cytokine production. Colitis increases recruitment of Th1 (19-fold) and Th17 (2.5-fold) cells. PSGL-1 deficiency in transferred T cells abrogates colonic recruitment of Th1 cells in DSS colitis, whereas Th17 recruitment is unaffected. CONCLUSIONS PSGL-1 selectively controls Th1 recruitment in colitis. Whereas Th17 recruitment is independent of PSGL-1, generation of colonic Th17 cytokine requires initial Th1 recruitment. Therefore, attenuating PSGL-1 binding may prevent colonic recruitment of disease-causing Th1 cells that promote local Th17 generation.
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Affiliation(s)
- Jeffrey B. Brown
- Department of Pediatrics/Children's Memorial Hospital, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Paul Cheresh
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Zheng Zhang
- Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Hyunji Ryu
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Elizabeth Managlia
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Terrence A. Barrett
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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Lin ACC, Dissanayake D, Dhanji S, Elford AR, Ohashi PS. Different toll-like receptor stimuli have a profound impact on cytokines required to break tolerance and induce autoimmunity. PLoS One 2011; 6:e23940. [PMID: 21931625 PMCID: PMC3171407 DOI: 10.1371/journal.pone.0023940] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 07/29/2011] [Indexed: 11/18/2022] Open
Abstract
Although toll-like receptor (TLR) signals are critical for promoting antigen presenting cell maturation, it remains unclear how stimulation via different TLRs influence dendritic cell (DC) function and the subsequent adaptive response in vivo. Furthermore, the relationship between TLR-induced cytokine production by DCs and the consequences on the induction of a functional immune response is not clear. We have established a murine model to examine whether TLR3 or TLR4 mediated DC maturation has an impact on the cytokines required to break tolerance and induce T-cell-mediated autoimmunity. Our study demonstrates that IL-12 is not absolutely required for the induction of a CD8 T-cell-mediated tissue specific immune response, but rather the requirement for IL-12 is determined by the stimuli used to mature the DCs. Furthermore, we found that IFNα is a critical pathogenic component of the cytokine milieu that circumvents the requirement for IL-12 in the induction of autoimmunity. These studies illustrate how different TLR stimuli have an impact on DC function and the induction of immunity.
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Affiliation(s)
- Albert C. C. Lin
- Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Dilan Dissanayake
- Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Salim Dhanji
- Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, Toronto, Ontario, Canada
| | - Alisha R. Elford
- Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, Toronto, Ontario, Canada
| | - Pamela S. Ohashi
- Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- * E-mail:
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Nuñez-Andrade N, Lamana A, Sancho D, Gisbert JP, Gonzalez-Amaro R, Sanchez-Madrid F, Urzainqui A. P-selectin glycoprotein ligand-1 modulates immune inflammatory responses in the enteric lamina propria. J Pathol 2011; 224:212-21. [PMID: 21432853 DOI: 10.1002/path.2850] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 11/30/2010] [Accepted: 12/21/2010] [Indexed: 12/22/2022]
Abstract
P-selectin glycoprotein ligand-1 (PSGL-1), a leukocyte adhesion receptor that interacts with selectins, induces a tolerogenic programme in bone marrow-derived dendritic cells (DCs), which in turn promotes the generation of T regulatory (Treg) lymphocytes. In the present study, we have used a mouse model of dextran sulphate sodium (DSS)-induced colitis and studied the characteristics of the inflammatory cell infiltrate in the lamina propria (LP), mesenteric lymph nodes (mLNs) and Peyer's patches (PPs) to assess the possible role of PSGL-1 in the modulation of the enteric immune response. We have found that untreated PSGL-1-deficient mice showed an altered proportion of innate and adaptive immune cells in mLNs and PPs as well as an activated phenotype of macrophages and DCs in the colonic LP that mainly produced pro-inflammatory cytokines. Administration of an anti-PSGL-1 antibody also reduced the total numbers of macrophages, DCs and B cells in the colonic LP, and induced a lower expression of MHC-II by DCs and macrophages. After DSS treatment, PSGL-1(-/-) mice developed colitis earlier and with higher severity than wild-type (WT) mice. Accordingly, the colonic LP of these animals showed an enhanced number of Th1 and Th17 lymphocytes, with enhanced synthesis of IL-1α, IL-6 and IL-22, and increased activation of LP macrophages. Together, our data indicate that PSGL-1 has a relevant homeostatic role in the gut-associated lymphoid tissue under steady-state conditions, and that this adhesion receptor is able to down-regulate the inflammatory phenomenon in DSS-induced colitis.
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Affiliation(s)
- Norman Nuñez-Andrade
- Departamento de Biología Vascular e Inflamación, CNIC, C/Melchor Fernández Almagro, 28034 Madrid, Spain
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Regulation of induced colonic inflammation by Lactobacillus acidophilus deficient in lipoteichoic acid. Proc Natl Acad Sci U S A 2011; 108 Suppl 1:4623-30. [PMID: 21282652 DOI: 10.1073/pnas.1005066107] [Citation(s) in RCA: 204] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Imbalance in the regulatory immune mechanisms that control intestinal cellular and bacterial homeostasis may lead to induction of the detrimental inflammatory signals characterized in humans as inflammatory bowel disease. Induction of proinflammatory cytokines (i.e., IL-12) induced by dendritic cells (DCs) expressing pattern recognition receptors may skew naive T cells to T helper 1 polarization, which is strongly implicated in mucosal autoimmunity. Recent studies show the ability of probiotic microbes to treat and prevent numerous intestinal disorders, including Clostridium difficile-induced colitis. To study the molecular mechanisms involved in the induction and repression of intestinal inflammation, the phosphoglycerol transferase gene that plays a key role in lipoteichoic acid (LTA) biosynthesis in Lactobacillus acidophilus NCFM (NCK56) was deleted. The data show that the L. acidophilus LTA-negative in LTA (NCK2025) not only down-regulated IL-12 and TNFα but also significantly enhanced IL-10 in DCs and controlled the regulation of costimulatory DC functions, resulting in their inability to induce CD4(+) T-cell activation. Moreover, treatment of mice with NCK2025 compared with NCK56 significantly mitigated dextran sulfate sodium and CD4(+)CD45RB(high)T cell-induced colitis and effectively ameliorated dextran sulfate sodium-established colitis through a mechanism that involves IL-10 and CD4(+)FoxP3(+) T regulatory cells to dampen exaggerated mucosal inflammation. Directed alteration of cell surface components of L. acidophilus NCFM establishes a potential strategy for the treatment of inflammatory intestinal disorders.
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Hong B, Song XT, Rollins L, Berry L, Huang XF, Chen SY. Mucosal and systemic anti-HIV immunity controlled by A20 in mouse dendritic cells. J Clin Invest 2011; 121:739-51. [PMID: 21206085 DOI: 10.1172/jci42656] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Accepted: 11/03/2010] [Indexed: 11/17/2022] Open
Abstract
Both mucosal and systemic immune responses are required for preventing or containing HIV transmission and chronic infection. However, currently described vaccination approaches are largely ineffective in inducing both mucosal and systemic responses. In this study, we found that the ubiquitin-editing enzyme A20--an inducible feedback inhibitor of the TNFR, RIG-I, and TLR signaling pathways that broadly controls the maturation, cytokine production, and immunostimulatory potency of DCs--restricted systemically immunized DCs to induce both robust mucosal and systemic HIV-specific cellular and humoral responses. Mechanistic studies revealed that A20 regulated DC production of retinoic acid and proinflammatory cytokines, inhibiting the expression of gut-homing receptors on T and B cells. Furthermore, A20-silenced, hyperactivated DCs exhibited an enhanced homing capacity to draining and gut-associated lymphoid tissues (GALTs) after systemic administration. Thus, this study provides insights into the role of A20 in innate immunity. This work may allow the development of an efficient HIV vaccination strategy that is capable of inducing both robust systemic and mucosal anti-HIV cellular and humoral responses.
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Affiliation(s)
- Bangxing Hong
- Department of Molecular Microbiology and Immunology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90033, USA
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Iwata M, Yokota A. Retinoic acid production by intestinal dendritic cells. VITAMINS AND HORMONES 2011; 86:127-52. [PMID: 21419270 DOI: 10.1016/b978-0-12-386960-9.00006-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Subpopulations of dendritic cells (DCs) in the small intestine and its related lymphoid organs can produce retinoic acid (RA) from vitamin A (retinol). Through the RA production, these DCs play a pivotal role in imprinting lymphocytes with gut-homing specificity, and contribute to the development of immune tolerance by enhancing the differentiation of Foxp3(+) regulatory T cells and inhibiting that of inflammatory Th17 cells. The RA-producing capacity in these DCs mostly depends on the expression of retinal dehydrogenase 2 (RALDH2, ALDH1A2). It is likely that the RALDH2 expression is induced in DCs by the microenvironmental factors in the small intestine and its related lymphoid organs. The major factor responsible for the RALDH2 expression appears to be GM-CSF. RA itself is essential for the GM-CSF-induced RALDH2 expression. IL-4 and IL-13 also enhance RALDH2 expression, but are dispensable. Toll-like receptor-mediated signals can also enhance the GM-CSF-induced RALDH2 expression in immature DCs.
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Affiliation(s)
- Makoto Iwata
- Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, Sanuki-shi, Kagawa, Japan
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35
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Menning A, Loddenkemper C, Westendorf AM, Szilagyi B, Buer J, Siewert C, Hamann A, Huehn J. Retinoic acid-induced gut tropism improves the protective capacity of Treg in acute but not in chronic gut inflammation. Eur J Immunol 2010; 40:2539-48. [PMID: 20690178 DOI: 10.1002/eji.200939938] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Treg are endowed with immunosuppressive activities and have been proposed as promising targets for the therapy of autoimmune diseases. As the suppressive capacity of Treg depends on their migration into the affected tissues, we tested here whether modulation of Treg homing would enhance their capacity to suppress inflammation in mouse models of inflammatory bowel disease. Retinoic acid (RA) was used to induce the gut-specific homing receptor alpha(4)beta(7) efficiently and, to some extent, the chemokine receptor CCR9 on in vitro expanded Treg. Upon transfer, RA-treated Treg were indeed more potent suppressors in an acute, small intestinal inflammation model, compared with Treg stimulated without RA. By contrast, the efficacy of Treg to resolve an established, chronic inflammation of the colon in the transfer colitis model was not affected by RA-treatment. In the latter model, a rapid loss of RA-induced alpha(4)beta(7) expression and de novo induction of alpha(4)beta(7) on previously negative cells was observed on transferred Treg, which implies that Treg acquire gut-seeking properties in vivo under inflammatory and/or lymphopenic conditions. Together, our data show that the induction of appropriate homing properties prior to transfer increases the protective potential of adoptively transferred Treg in acute, but not in chronic, inflammatory disorders of the gut.
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Affiliation(s)
- Astrid Menning
- Experimental Rheumatology, Charité University Medicine, Berlin, Germany
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36
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Kelly KA, Chan AM, Butch A, Darville T. Two different homing pathways involving integrin β7 and E-selectin significantly influence trafficking of CD4 cells to the genital tract following Chlamydia muridarum infection. Am J Reprod Immunol 2009; 61:438-45. [PMID: 19392981 DOI: 10.1111/j.1600-0897.2009.00704.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
PROBLEM Chlamydia trachomatis causes STI and reproductive dysfunction worldwide which is not preventable with antibiotics. Identifying a population of endocervical T cells to target in vaccine development would enhance efficacy. METHOD OF STUDY Trafficking of murine CD4+ lymphocytes to Chlamydia muridarum infected genital tract (GT) tissue in vivo was measured using adoptive transfer studies of fluorescent CD4+ T cells from integrin β7-/- mice or mice which lack E-selectin on endothelial cells. RESULTS Murine in vivo migration studies showed that lack of α4β7 or E-selectin significantly reduced trafficking of CD4 T cells to the GT of mice infected with C. muridarum. CONCLUSION CD4+ T cells use at least two different adhesive mechanisms involving an integrin of the mucosal homing pathway and selectin pathway to accumulate in the GT during C. muridarum infection.
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Affiliation(s)
- Kathleen A Kelly
- Department of Pathology & Laboratory Medicine, Geffen School of Medicine, University of California, Los Angeles, CA 90095-1732, USA.
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37
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Kelly KA, Wiley D, Wiesmeier E, Briskin M, Butch A, Darville T. The combination of the gastrointestinal integrin (α4β7) and selectin ligand enhances T-Cell migration to the reproductive tract during infection with Chlamydia trachomatis. Am J Reprod Immunol 2009; 61:446-52. [PMID: 19392980 DOI: 10.1111/j.1600-0897.2009.00705.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
PROBLEM Chlamydia trachomatis causes sexually transmitted infection and reproductive dysfunction worldwide. Identifying a population of endocervical T-cells to target in vaccine development is likely to enhance efficacy of a vaccine and reduce reproductive tract dysfunction. METHOD OF STUDY Endocervical samples were obtained from young women and flow cytometric analysis was used to identify lymphocytes that appeared in the genital tract in response to sexually transmitted bacterial infections caused by C. trachomatis. RESULTS Increased numbers of α4β7+CLA+ memory T-cells, a unique T-cell phenotype, were found in the endocervix of human female subjects infected with C. trachomatis. CONCLUSION A unique population of memory T lymphocytes expressing both α4β7 and CLA gain access to reproductive tract tissues during a sexually transmitted infection with C. trachomatis and should be considered in development of vaccines against sexually transmitted infections.
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Affiliation(s)
- Kathleen A Kelly
- Department of Pathology & Laboratory Medicine, Geffen School of Medicine, University of California, Los Angeles, CA 90095-1732, USA.
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38
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Miura S, Kubes P, Granger DN. Gastrointestinal and Liver Microcirculations: Roles in Inflammation and Immunity. Compr Physiol 2008. [DOI: 10.1002/cphy.cp020414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Cutaneous lymphocyte antigen-positive T cells may predict the development of acute GVHD: alterations and differences of CLA+ T- and NK-cell fractions. Bone Marrow Transplant 2008; 43:863-73. [PMID: 19043457 DOI: 10.1038/bmt.2008.392] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Acute GVHD (aGVHD) is a serious complication after allogeneic SCT (allo-SCT). However, an adequate immunological index is not yet available for assessing its severity. We analyzed the fraction of cutaneous lymphocyte antigen (CLA)+ cells in peripheral blood T and natural killer (NK) cells in 33 patients and evaluated its association with aGVHD. The CLA+ T-cell fraction often increased 3-7 days before the onset of aGVHD, and the maximum percentage of CLA+ T cells in grades II-IV aGVHD cases was significantly higher than that in grade 0 or I aGVHD (P<0.01). When the cutoff value of the maximum CLA+ T-cell percentage was set at 20%, any higher percentage was a significant risk for the development of severe aGVHD (P<0.0001). The maximum CLA+ T-cell percentage was significantly correlated with a high body temperature, low percutaneous oxygen saturation, and fibrinogen/fibrin degradation product D-dimer level. The post-allo-SCT CLA+ T cells exhibited a high ability to produce IL-2 and IFN-gamma, and may be the effectors and immunological markers for aGVHD. The CLA+ NK-cell-fraction steadily increased 2-4 weeks after allo-SCT but was not influenced by aGVHD. The CLA+ T-cell percentage may predict the development of severe aGVHD in clinical settings.
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40
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Doebis C, Siegmund K, Loddenkemper C, Lowe JB, Issekutz AC, Hamann A, Huehn J, Syrbe U. Cellular players and role of selectin ligands in leukocyte recruitment in a T-cell-initiated delayed-type hypersensitivity reaction. THE AMERICAN JOURNAL OF PATHOLOGY 2008; 173:1067-76. [PMID: 18755847 DOI: 10.2353/ajpath.2008.080052] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Delayed-type hypersensitivity (DTH) reactions are characterized by a strong cellular infiltrate, including neutrophils, macrophages, and T lymphocytes. In all these cell types, both E- and P-selectin-dependent adhesion pathways play a significant role in recruitment into the inflamed skin. Accordingly, inhibition of selectin-mediated interactions (eg, by antibodies) results in impairment of acute DTH reactions. However, whether inhibition of a specific cell type is responsible for the anti-inflammatory effect or whether all leukocytes are affected remains unclear. To address this question, we used fucosyltransferase-VII knockout mice that lack functional selectin ligands as either donors or recipients in a DTH model elicited by Th1 cell and antigen transfer. We found that selectin-mediated adhesion is required by Th1 effector cells to enter the DTH reaction site and, additionally, to elicit the DTH reaction. On the other hand, elimination of selectin binding in the recipient's neutrophils and macrophages by use of fucosyltransferase-deficient mice receiving wild-type Th1 effector cells resulted in a strongly reduced infiltration of neutrophils and macrophages but unimpaired footpad swelling. These findings demonstrate a major role for both E- and P-selectin in the recruitment of different leukocyte cell types. However, only the presence of selectin ligands on T cells was critical for the inflammatory reaction. These findings reveal T cells as the predominant targets for selectin blockade that aim to suppress skin inflammation.
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Affiliation(s)
- Cornelia Doebis
- Départemente of Experimentelle Rheumatologie, Charité, Campus Mitte, Berlin, Germany
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41
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Ibiza S, Serrador J. The role of nitric oxide in the regulation of adaptive immune responses. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/s0213-9626(08)70058-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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42
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Miura S, Kubes P, Granger DN. Gastrointestinal and Liver Microcirculations. Microcirculation 2008. [DOI: 10.1016/b978-0-12-374530-9.00016-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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43
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Prevention of acute graft-versus-host disease by blocking T-cell entry to secondary lymphoid organs. Blood 2007; 111:2919-28. [PMID: 17989315 DOI: 10.1182/blood-2007-09-112789] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
In acute graft-versus-host disease (aGVHD), donor T cells attack the recipient's gastrointestinal tract, liver, and skin. We hypothesized that blocking access to distinct lymphoid priming sites may alter the specific organ tropism and prevent aGVHD development. In support of this initial hypothesis, we found that different secondary lymphoid organs (SLOs) imprint distinct homing receptor phenotypes on evolving alloreactive effector T cells in vivo. Yet preventing T-cell entry to specific SLOs through blocking monoclonal antibodies, or SLO ablation, did not alter aGVHD pathophysiology. Moreover, transfer of alloreactive effector T cells into conditioned secondary recipients targeted the intestines and liver, irrespective of their initial priming site. Thus, we demonstrate redundancy of SLOs at different anatomical sites in aGVHD initiation. Only prevention of T-cell entry to all SLOs could completely abrogate the onset of aGVHD.
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Jennrich S, Ratsch BA, Hamann A, Syrbe U. Long-Term Commitment to Inflammation-Seeking Homing in CD4+ Effector Cells. THE JOURNAL OF IMMUNOLOGY 2007; 178:8073-80. [PMID: 17548645 DOI: 10.4049/jimmunol.178.12.8073] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Access of T effector cells to sites of inflammation is a prerequisite for an efficient action in immune defense and is mediated by different, partly tissue-specific sets of adhesion molecules. To what extent lymphocytes memorize the site of initial priming and develop organ-specific homing properties is still a matter of debate. Notably, data on the stability of homing receptor expression on T cells in vivo are largely lacking. We approached this question by the adoptive transfer of CD4(+) T cells sorted for the expression of P-selectin ligands, which contribute to migration into inflamed sites in skin and other tissues. We observed long-term expression of P-selectin ligands on roughly one-third of effector cells. On those cells that had lost P-selectin ligands, re-expression upon Ag challenge was observed but only within pLNs, similar to the organ-selective induction upon the primary activation of naive T cells. The frequency of cells stably expressing P-selectin ligands was higher when cells were repeatedly stimulated under permissive conditions in the presence of IL-12, indicating a gradual fixation of this phenotype. In line with that finding, isolated P-selectin ligand positive memory T cells showed the highest frequency of long-term expressing cells. A tissue-specific environment was not required for the long-term maintenance of P-selectin ligand expression on the subfraction of effector cells. These data indicate that the expression of selectin ligands can become clonally imprinted under certain conditions, but also that a major fraction of the cells remains flexible and subject to environmental modulation upon restimulation.
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Affiliation(s)
- Silke Jennrich
- Charité, Campus Mitte, Experimentelle Rheumatologie, c/o Deutsches Rheumaforschungszentrum, 12200 Berlin, Germany
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45
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Ostanin DV, Furr KL, Pavlick KP, Gray L, Kevil CG, Shukla D, D'Souza D, Hoffman JM, Grisham MB. T cell-associated CD18 but not CD62L, ICAM-1, or PSGL-1 is required for the induction of chronic colitis. Am J Physiol Gastrointest Liver Physiol 2007; 292:G1706-14. [PMID: 17332469 DOI: 10.1152/ajpgi.00573.2006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The induction and perpetuation of chronic colitis are thought to involve a complex set of adhesive interactions between T cells and endothelial cells located on the vasculature within secondary lymphoid tissue and the intestine. The objective of this study was to assess the roles of T cell-associated CD18, CD62L (L-selectin), ICAM-1, and P-selectin glycoprotein ligand-1 (PSGL-1) in the induction of chronic colitis in mice. CD4(+)CD25(-) T cells derived from either wild-type (WT), CD18-deficient [CD18 knockout (KO)], CD62L KO, ICAM-1 KO, or PSGL-1 KO mice were adoptively transferred into recombinase activating gene-1 (RAG-1)-deficient mice (RAG KO mice) to assess the potential of these T cells to induce chronic colitis. At 8-10 wk following T cell transfer, we observed moderate to severe colitis as assessed by increases in colon weight-to-length ratios and by blinded histopathological analysis. In contrast, we found that transfer of CD18 KO T cells into RAG KO recipients resulted in the significant attenuation of colonic inflammation in these mice. Furthermore, we observed fewer infiltrating CD4(+) T cells in the colonic lamina propria in the CD18 KO-->RAG KO group compared with the WT-->RAG KO group. Finally, message levels of colonic TNF-alpha, IL-1beta, and IFN-gamma were significantly reduced in CD18 KO-->RAG KO mice compared with colitic control animals. We conclude that T cell-associated CD18, but not CD62L, ICAM-1, or PSGL-1, is required for the development of chronic colitis.
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Affiliation(s)
- Dmitry V Ostanin
- Dept. of Molecular and Cellular Physiology, Louisana State Univ. Health Sciences Center, 1501 Kings Highway, PO Box 33932, Shreveport, LA 71130-3932, USA
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Agrewala JN, Brown DM, Lepak NM, Duso D, Huston G, Swain SL. Unique Ability of Activated CD4+ T Cells but Not Rested Effectors to Migrate to Non-lymphoid Sites in the Absence of Inflammation. J Biol Chem 2007; 282:6106-15. [PMID: 17197446 DOI: 10.1074/jbc.m608266200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Recent studies suggest that effector T cells generated by immune responses migrate to multiple non-lymphoid sites, even those without apparent expression of antigen or inflammation. To investigate the ability of distinct CD4(+) T lymphocyte subsets to enter and persist in non-lymphoid, noninflamed compartments, we examined the migration and persistence of naïve, effector, and rested effector CD4(+) T cells generated in vitro following transfer to nonimmunized adoptive hosts. Th1 and Th2 effectors migrated to both lymphoid and non-lymphoid organs (peritoneum, fat pads, and lung). In contrast, rested effectors and naïve cells migrated only to lymphoid areas. Adhesion molecule expression, but not chemokine receptor expression, correlated with the ability to enter non-lymphoid sites. Donor cells persisted longer in lymphoid than in non-lymphoid sites. When hosts with naïve and memory donor cells were challenged with antigen, effectors developed in situ, which also migrated to non-lymphoid sites. Memory cells showed an accelerated shift to non-lymphoid migration, in keeping with memory effector formation. These results suggest that only recently activated effector T cells can disperse to non-lymphoid sites in the absence of antigen and inflammation, and as effectors return to rest, they lose this ability. These data also argue that memory cells in lymphoid sites are longer lived and not in equilibrium with those in non-lymphoid sites.
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Syrbe U, Hoffmann U, Schlawe K, Liesenfeld O, Erb K, Hamann A. Microenvironment-dependent requirement of STAT4 for the induction of P-selectin ligands and effector cytokines on CD4+ T cells in healthy and parasite-infected mice. THE JOURNAL OF IMMUNOLOGY 2007; 177:7673-9. [PMID: 17114437 DOI: 10.4049/jimmunol.177.11.7673] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
T effector cells require selectin ligands to migrate into inflamed regions. In vitro, IL-12 promotes induction of these ligands as well as differentiation of CD4+ T cells into IFN-gamma-producing Th1 but not Th2 cells. STAT4 is strongly involved in these processes. However, the presence of selectin ligands on various T effector cell subsets in vivo points to more complex regulatory pathways. To clarify the role of the IL-12/STAT4 signaling pathway, we analyzed the impact of STAT4 deficiency on the expression of P-selectin ligands (P-lig) on CD4+ T cells in vitro and in vivo, including conditions of infection. In vitro, we found significant expression of P-lig upon activation not only in the presence, but also in the absence, of IL-12, which was independent of STAT4. TGF-beta, an alternative inducer of selectin ligands in human T cells, was not effective in murine CD4+ T cells, suggesting a role of additional signaling pathways. In vivo, a significant impact of STAT4 for the generation of P-lig+CD4+ T cells was observed for cells from peripheral lymph nodes, but not for those from spleen or lung. However, upon infection with the Th2-inducing parasite Nippostrongylus brasiliensis, P-lig expression became dependent on STAT4 signaling. Interestingly, also the frequency of IL-4-producing cells was greatly diminished in absence of STAT4. These data reveal a hitherto unknown contribution of STAT4 to the generation of Th2 cells in parasite infection and suggest that signals inducing inflammation-seeking properties in vivo vary depending on environmental conditions, such as type of organ and infection.
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Affiliation(s)
- Uta Syrbe
- Charité, Campus Mitte, Experimentelle Rheumatologie, c/o Deutsches Rheumaforschungszentrum, Schumannstrasse 21/22, 10117 Berlin, Germany.
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48
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Abstract
T cell memory induced by prior infection or vaccination provides enhanced protection against subsequent microbial infections. The processes involved in generating and maintaining T cell memory are becoming better understood due to recent technological advances in identifying memory T cells and monitoring their behavior and function in vivo. Memory T cells develop in response to a progressive set of cues-starting with signals from antigen-loaded, activated antigen-presenting cells (APCs) and inflammatory mediators induced by the innate immune response, to the poorly defined subsequent signals triggered as the immune response wanes toward homeostasis. The persistence of the resting memory T cells that eventually develop is regulated by cytokines. This chapter discusses recent findings on how memory T cells develop to confer long-term protective immunity.
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Affiliation(s)
- J T Tan
- Department of Immunology, The Scripps Research Institute, 10550 North Torrey Pines Rd., La Jolla, CA 92037, USA
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49
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Abstract
The localization of effector T cells to extralymphoid tissues is crucial for the generation of an effective immune response, but it also underlies many autoimmune and inflammatory disorders. Recent studies have highlighted a central role for draining lymph nodes and environmentally imprinted dendritic cells in the generation of tissue-tropic effector T cells. Here, I outline our current understanding of the mechanisms that regulate the generation and localization of tissue-tropic effector T cells, and the potential ways in which these pathways can be exploited for immunotherapeutic purposes.
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Affiliation(s)
- William W Agace
- Immunology Section, Lund University, BMC I13, 22184 Lund, Sweden.
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Lefrançois L, Puddington L. Intestinal and pulmonary mucosal T cells: local heroes fight to maintain the status quo. Annu Rev Immunol 2006; 24:681-704. [PMID: 16551263 DOI: 10.1146/annurev.immunol.24.021605.090650] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mucosal immunity in the lung and intestine is controlled by complex multifaceted systems. While mucosal T cells are essential for protection against invading pathogens owing to their proximity to the outside world, powerful systems must also be in place to harness ongoing inflammatory processes. In each site, distinct anatomical structures play key roles in mounting and executing both protective and deleterious mucosal T cell responses. Although analogies can be drawn regarding the immune systems of these two organs, there are substantial dissimilarities necessitated by unique physiologic constraints. Here, we discuss how T cell activation and effector function are generated in the mucosae.
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Affiliation(s)
- Leo Lefrançois
- Center for Integrative Immunology and Vaccine Research, Department of Immunology, University of Connecticut Health Center, Farmington, Connecticut 06030-1319, USA.
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