1
|
Kumar P, Rajasekaran K, Malarkannan S. Novel PI(3)K-p85α/p110δ-ITK-LAT-PLC-γ2 and Fyn-ADAP-Carma1-TAK1 Pathways Define Reverse Signaling via FasL. Crit Rev Immunol 2024; 44:55-77. [PMID: 37947072 DOI: 10.1615/critrevimmunol.2023049638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
The role of FasL in initiating death signals through Fas is well characterized. However, the reverse signaling pathway downstream of FasL in effector lymphocytes is poorly understood. Here, we identify that FasL functions as an independent activation receptor in NK cells. Activation via FasL results in the production of LFN-γ, GM-CSF, RANTES, MIP-1α, and MIP1-β. Proximal signaling of FasL requires Lck and Fyn. Upon activation, FasL facilitates the phosphorylation of PI(3)K-p85α/p55α subunits. A catalytically inactive PI(3)K-p110δD910A mutation significantly impairs the cytokine and chemokine production by FasL. Activation of ITK and LAT downstream of FasL plays a central role in recruiting and phosphorylating PLC-γ2. Importantly, Fyn-mediated recruitment of ADAP links FasL to the Carmal/ Bcl10/Tak1 signalosome. Lack of Carma1, CARD domain of Carma1, or Tak1 significantly reduces FasL-mediated cytokine and chemokine production. These findings, for the first time, provide a detailed molecular blueprint that defines FasL-mediated reverse signaling.
Collapse
Affiliation(s)
- Pawan Kumar
- Department of Microbiology and Immunology, Stony Brook University, Stony Brook, NY 11794
| | | | - Subramaniam Malarkannan
- Laboratory of Molecular Immunology and Immunotherapy, Blood Research Institute, Milwaukee, WI 53226; Departments of Pediatrics and Medicine, Medical College of Wisconsin, Milwaukee, WI 53226
| |
Collapse
|
2
|
Wilson JJ, Wei J, Daamen AR, Sears JD, Bechtel E, Mayberry CL, Stafford GA, Bechtold L, Grammer AC, Lipsky PE, Roopenian DC, Chang CH. Glucose oxidation-dependent survival of activated B cells provides a putative novel therapeutic target for lupus treatment. iScience 2023; 26:107487. [PMID: 37636066 PMCID: PMC10448027 DOI: 10.1016/j.isci.2023.107487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 03/27/2023] [Accepted: 07/24/2023] [Indexed: 08/29/2023] Open
Abstract
Aberrant metabolic demand is observed in immune/inflammatory disorders, yet the role in pathogenesis remains unclear. Here, we discover that in lupus, activated B cells, including germinal center B (GCB) cells, have remarkably high glycolytic requirement for survival over T cell populations, as demonstrated by increased metabolic activity in lupus-activated B cells compared to immunization-induced cells. The augmented reliance on glucose oxidation makes GCB cells vulnerable to mitochondrial ROS-induced oxidative stress and apoptosis. Short-term glycolysis inhibition selectively reduces pathogenic activated B in lupus-prone mice, extending their lifespan, without affecting T follicular helper cells. Particularly, BCMA-expressing GCB cells rely heavily on glucose oxidation. Depleting BCMA-expressing activated B cells with APRIL-based CAR-T cells significantly prolongs the lifespan of mice with severe autoimmune disease. These results reveal that glycolysis-dependent activated B and GCB cells, especially those expressing BCMA, are potentially key lupus mediators, and could be targeted to improve disease outcomes.
Collapse
Affiliation(s)
- John J. Wilson
- The Jackson Laboratory, Bar Harbor, Maine, ME 04609, USA
| | - Jian Wei
- The Jackson Laboratory, Bar Harbor, Maine, ME 04609, USA
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Andrea R. Daamen
- AMPEL BioSolutions and the RILITE Research Institute, Charlottesville, VA 22902, USA
| | - John D. Sears
- The Jackson Laboratory, Bar Harbor, Maine, ME 04609, USA
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Elaine Bechtel
- The Jackson Laboratory, Bar Harbor, Maine, ME 04609, USA
| | | | | | | | - Amrie C. Grammer
- AMPEL BioSolutions and the RILITE Research Institute, Charlottesville, VA 22902, USA
| | - Peter E. Lipsky
- AMPEL BioSolutions and the RILITE Research Institute, Charlottesville, VA 22902, USA
| | | | - Chih-Hao Chang
- The Jackson Laboratory, Bar Harbor, Maine, ME 04609, USA
- Graduate School of Biomedical Sciences and Engineering, University of Maine, Orono, ME 04469, USA
- Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, MA 02111, USA
| |
Collapse
|
3
|
Mahadevan KK, LeBleu VS, Ramirez EV, Chen Y, Li B, Sockwell AM, Gagea M, Sugimoto H, Sthanam LK, Tampe D, Zeisberg M, Ying H, Jain AK, DePinho RA, Maitra A, McAndrews KM, Kalluri R. Elimination of oncogenic KRAS in genetic mouse models eradicates pancreatic cancer by inducing FAS-dependent apoptosis by CD8 + T cells. Dev Cell 2023; 58:1562-1577.e8. [PMID: 37625403 PMCID: PMC10810082 DOI: 10.1016/j.devcel.2023.07.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 05/02/2023] [Accepted: 07/31/2023] [Indexed: 08/27/2023]
Abstract
Oncogenic KRASG12D (KRAS∗) is critical for the initiation and maintenance of pancreatic ductal adenocarcinoma (PDAC) and is a known repressor of tumor immunity. Conditional elimination of KRAS∗ in genetic mouse models of PDAC leads to the reactivation of FAS, CD8+ T cell-mediated apoptosis, and complete eradication of tumors. KRAS∗ elimination recruits activated CD4+ and CD8+ T cells and promotes the activation of antigen-presenting cells. Mechanistically, KRAS∗-mediated immune evasion involves the epigenetic regulation of Fas death receptor in cancer cells, via methylation of its promoter region. Furthermore, analysis of human RNA sequencing identifies that high KRAS expression in PDAC tumors shows a lower proportion of CD8+ T cells and demonstrates shorter survival compared with tumors with low KRAS expression. This study highlights the role of CD8+ T cells in the eradication of PDAC following KRAS∗ elimination and provides a rationale for the combination of KRAS∗ targeting with immunotherapy to control PDAC.
Collapse
Affiliation(s)
- Krishnan K Mahadevan
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Valerie S LeBleu
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA; Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Elena V Ramirez
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Yang Chen
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Bingrui Li
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Amari M Sockwell
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Mihai Gagea
- Department of Veterinary Medicine and Surgery, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Hikaru Sugimoto
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Lakshmi Kavitha Sthanam
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Desiree Tampe
- Department of Nephrology and Rheumatology, Göttingen University Medical Center, Georg August University, Göttingen, Germany
| | - Michael Zeisberg
- Department of Nephrology and Rheumatology, Göttingen University Medical Center, Georg August University, Göttingen, Germany
| | - Haoqiang Ying
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Abhinav K Jain
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ronald A DePinho
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Anirban Maitra
- Department of Translational Molecular Pathology, Ahmad Center for Pancreatic Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kathleen M McAndrews
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Raghu Kalluri
- Department of Cancer Biology, Metastasis Research Center, University of Texas MD Anderson Cancer Center, Houston, TX, USA; Department of Bioengineering, Rice University, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA.
| |
Collapse
|
4
|
Terrabuio E, Zenaro E, Constantin G. The role of the CD8+ T cell compartment in ageing and neurodegenerative disorders. Front Immunol 2023; 14:1233870. [PMID: 37575227 PMCID: PMC10416633 DOI: 10.3389/fimmu.2023.1233870] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 07/13/2023] [Indexed: 08/15/2023] Open
Abstract
CD8+ lymphocytes are adaptive immunity cells with the particular function to directly kill the target cell following antigen recognition in the context of MHC class I. In addition, CD8+ T cells may release pro-inflammatory cytokines, such as tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ), and a plethora of other cytokines and chemoattractants modulating immune and inflammatory responses. A role for CD8+ T cells has been suggested in aging and several diseases of the central nervous system (CNS), including Alzheimer's disease, Parkinson's disease, multiple sclerosis, amyotrophic lateral sclerosis, limbic encephalitis-induced temporal lobe epilepsy and Susac syndrome. Here we discuss the phenotypic and functional alterations of CD8+ T cell compartment during these conditions, highlighting similarities and differences between CNS disorders. Particularly, we describe the pathological changes in CD8+ T cell memory phenotypes emphasizing the role of senescence and exhaustion in promoting neuroinflammation and neurodegeneration. We also discuss the relevance of trafficking molecules such as selectins, mucins and integrins controlling the extravasation of CD8+ T cells into the CNS and promoting disease development. Finally, we discuss how CD8+ T cells may induce CNS tissue damage leading to neurodegeneration and suggest that targeting detrimental CD8+ T cells functions may have therapeutic effect in CNS disorders.
Collapse
Affiliation(s)
- Eleonora Terrabuio
- Department of Medicine, Section of General Pathology, University of Verona, Verona, Italy
| | | | | |
Collapse
|
5
|
Risso V, Lafont E, Le Gallo M. Therapeutic approaches targeting CD95L/CD95 signaling in cancer and autoimmune diseases. Cell Death Dis 2022; 13:248. [PMID: 35301281 PMCID: PMC8931059 DOI: 10.1038/s41419-022-04688-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 02/09/2022] [Accepted: 02/24/2022] [Indexed: 12/14/2022]
Abstract
Cell death plays a pivotal role in the maintenance of tissue homeostasis. Key players in the controlled induction of cell death are the Death Receptors (DR). CD95 is a prototypic DR activated by its cognate ligand CD95L triggering programmed cell death. As a consequence, alterations in the CD95/CD95L pathway have been involved in several disease conditions ranging from autoimmune diseases to inflammation and cancer. CD95L-induced cell death has multiple roles in the immune response since it constitutes one of the mechanisms by which cytotoxic lymphocytes kill their targets, but it is also involved in the process of turning off the immune response. Furthermore, beyond the canonical pro-death signals, CD95L, which can be membrane-bound or soluble, also induces non-apoptotic signaling that contributes to its tumor-promoting and pro-inflammatory roles. The intent of this review is to describe the role of CD95/CD95L in the pathophysiology of cancers, autoimmune diseases and chronic inflammation and to discuss recently patented and emerging therapeutic strategies that exploit/block the CD95/CD95L system in these diseases.
Collapse
Affiliation(s)
- Vesna Risso
- INSERM U1242, Oncogenesis Stress Signaling, University of Rennes, Rennes, France
- Centre de lutte contre le cancer Eugène Marquis, Rennes, France
| | - Elodie Lafont
- INSERM U1242, Oncogenesis Stress Signaling, University of Rennes, Rennes, France
- Centre de lutte contre le cancer Eugène Marquis, Rennes, France
| | - Matthieu Le Gallo
- INSERM U1242, Oncogenesis Stress Signaling, University of Rennes, Rennes, France.
- Centre de lutte contre le cancer Eugène Marquis, Rennes, France.
| |
Collapse
|
6
|
Abstract
I've had serious misgivings about writing this article, because from living the experience day by day, it's hard to believe my accomplishments merit the attention. To skirt this roadblock, I forced myself to pretend I was in a conversation with my trainees, trying to distill the central driving forces of my career in science. The below chronicles my evolution from would-be astronaut/ballerina to budding developmental biologist to devoted T cell immunologist. It traces my work from a focus on intrathymic events that mold developing T cells into self-major histocompatibility complex (MHC)-restricted lymphocytes to extrathymic events that fine-tune the T cell receptor (TCR) repertoire and impose the finishing touches on T cell maturation. It is a story of a few personal attributes multiplied by generous mentors, good luck, hard work, perseverance, and knowing when to step down. Expected final online publication date for the Annual Review of Immunology, Volume 40 is April 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
Collapse
Affiliation(s)
- Pamela J Fink
- Department of Immunology, University of Washington, Seattle, Washington, USA;
| |
Collapse
|
7
|
Baker JR, Donnelly LE. Leukocyte Function in COPD: Clinical Relevance and Potential for Drug Therapy. Int J Chron Obstruct Pulmon Dis 2021; 16:2227-2242. [PMID: 34354348 PMCID: PMC8331105 DOI: 10.2147/copd.s266394] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 07/19/2021] [Indexed: 11/23/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a progressive lung condition affecting 10% of the global population over 45 years. Currently, there are no disease-modifying treatments, with current therapies treating only the symptoms of the disease. COPD is an inflammatory disease, with a high infiltration of leukocytes being found within the lung of COPD patients. These leukocytes, if not kept in check, damage the lung, leading to the pathophysiology associated with the disease. In this review, we focus on the main leukocytes found within the COPD lung, describing how the release of chemokines from the damaged epithelial lining recruits these cells into the lung. Once present, these cells become active and may be driven towards a more pro-inflammatory phenotype. These cells release their own subtypes of inflammatory mediators, growth factors and proteases which can all lead to airway remodeling, mucus hypersecretion and emphysema. Finally, we describe some of the current therapies and potential new targets that could be utilized to target aberrant leukocyte function in the COPD lung. Here, we focus on old therapies such as statins and corticosteroids, but also look at the emerging field of biologics describing those which have been tested in COPD already and potential new monoclonal antibodies which are under review.
Collapse
Affiliation(s)
- Jonathan R Baker
- Airway Disease, National Heart and Lung Institute, Imperial College London, London, UK
| | - Louise E Donnelly
- Airway Disease, National Heart and Lung Institute, Imperial College London, London, UK
| |
Collapse
|
8
|
Flores-Mendoza G, Rodríguez-Rodríguez N, Rubio RM, Madera-Salcedo IK, Rosetti F, Crispín JC. Fas/FasL Signaling Regulates CD8 Expression During Exposure to Self-Antigens. Front Immunol 2021; 12:635862. [PMID: 33841416 PMCID: PMC8024570 DOI: 10.3389/fimmu.2021.635862] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/04/2021] [Indexed: 11/13/2022] Open
Abstract
Activation of self-reactive CD8+ T cells induces a peripheral tolerance mechanism that involves loss of CD8 expression. Because genetic deficiency of Fas and Fasl causes the accumulation of double-negative (DN; CD3+ TCR-αβ+ CD4- CD8-) T cells that have been proposed to derive from CD8+ cells, we decided to explore the role of Fas and FasL in self-antigen-induced CD8 downregulation. To this end, we quantified Fas and FasL induction by different stimuli and analyzed the effects of Fas/FasL deficiency during a protective immune response and after exposure to self-antigens. Our data describes how Fas and FasL upregulation differs depending on the setting of CD8 T cell activation and demonstrates that Fas/FasL signaling maintains CD8 expression during repetitive antigen stimulation and following self-antigen encounter. Together, our results reveal an unexpected role of Fas/FasL signaling and offer a new insight into the role of these molecules in the regulation of immune tolerance.
Collapse
Affiliation(s)
- Giovanna Flores-Mendoza
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - Noé Rodríguez-Rodríguez
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Rosa M. Rubio
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Iris K. Madera-Salcedo
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Florencia Rosetti
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - José C. Crispín
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Monterrey, Mexico
| |
Collapse
|
9
|
Bandey IN, Adolacion JRT, Romain G, Paniagua MM, An X, Saeedi A, Liadi I, You Z, Rajanayake RB, Hwu P, Singh H, Cooper LJ, Varadarajan N. Designed improvement to T-cell immunotherapy by multidimensional single cell profiling. J Immunother Cancer 2021; 9:e001877. [PMID: 33722906 PMCID: PMC7970283 DOI: 10.1136/jitc-2020-001877] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2021] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Adoptive cell therapy based on the infusion of chimeric antigen receptor (CAR) T cells has shown remarkable efficacy for the treatment of hematologic malignancies. The primary mechanism of action of these infused T cells is the direct killing of tumor cells expressing the cognate antigen. However, understanding why only some T cells are capable of killing, and identifying mechanisms that can improve killing has remained elusive. METHODS To identify molecular and cellular mechanisms that can improve T-cell killing, we utilized integrated high-throughput single-cell functional profiling by microscopy, followed by robotic retrieval and transcriptional profiling. RESULTS With the aid of mathematical modeling we demonstrate that non-killer CAR T cells comprise a heterogeneous population that arise from failure in each of the discrete steps leading to the killing. Differential transcriptional single-cell profiling of killers and non-killers identified CD137 as an inducible costimulatory molecule upregulated on killer T cells. Our single-cell profiling results directly demonstrate that inducible CD137 is feature of killer (and serial killer) T cells and this marks a different subset compared with the CD107apos (degranulating) subset of CAR T cells. Ligation of the induced CD137 with CD137 ligand (CD137L) leads to younger CD19 CAR T cells with sustained killing and lower exhaustion. We genetically modified CAR T cells to co-express CD137L, in trans, and this lead to a profound improvement in anti-tumor efficacy in leukemia and refractory ovarian cancer models in mice. CONCLUSIONS Broadly, our results illustrate that while non-killer T cells are reflective of population heterogeneity, integrated single-cell profiling can enable identification of mechanisms that can enhance the function/proliferation of killer T cells leading to direct anti-tumor benefit.
Collapse
Affiliation(s)
- Irfan N Bandey
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, USA
| | - Jay R T Adolacion
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, USA
| | - Gabrielle Romain
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, USA
| | | | - Xingyue An
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, USA
| | - Arash Saeedi
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, USA
| | - Ivan Liadi
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, USA
| | - Zheng You
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, USA
| | - Rasindu B Rajanayake
- Department of Biomedical Engineering, University of Houston, Houston, Texas, USA
| | - Patrick Hwu
- Department of of Melanoma Medical Oncology, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Harjeet Singh
- Divsion of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Laurence Jn Cooper
- Divsion of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
- Ziopharm Oncology, Houston, Texas, USA
| | - Navin Varadarajan
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, USA
| |
Collapse
|
10
|
Lim YS, Lee DY, Kim HY, Ok Y, Hwang S, Moon Y, Yoon S. Descriptive and functional characterization of epidermal growth factor‑like domain 8 in mouse cortical thymic epithelial cells by integrated analysis of gene expression signatures and networks. Int J Mol Med 2021; 47:4. [PMID: 33448309 PMCID: PMC7834963 DOI: 10.3892/ijmm.2020.4837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 11/24/2020] [Indexed: 12/20/2022] Open
Abstract
Epidermal growth factor-like domain 8 (EGFL8), a newly identified member of the EGFL family, and plays negative regulatory roles in mouse thymic epithelial cells (TECs) and thymocytes. However, the role of EGFL8 in these cells remains poorly understood. In the present study, in order to characterize the function of EGFL8, genome-wide expression profiles in EGFL8-overexpressing or -silenced mouse cortical TECs (cTECs) were analyzed. Microarray analysis revealed that 458 genes exhibited a >2-fold change in expression levels in the EGFL8-overexpressing vs. the EGFL8-silenced cTECs. Several genes involved in a number of cellular processes, such as the cell cycle, proliferation, growth, migration and differentiation, as well as in apoptosis, reactive oxygen species generation, chemotaxis and immune responses, were differentially expressed in the EGFL8-overexpressing or -silenced cTECs. WST-1 analysis revealed that that the overexpression of EGFL8 inhibited cTEC proliferation. To investigate the underlying mechanisms of EGFL8 in the regulation of cTEC function, genes related to essential cellular functions were selected. Reverse transcription-polymerase chain reaction analysis revealed that EGFL8 knockdown upregulated the expression of cluster differentiation 74 (CD74), Fas ligand (FasL), C-X-C motif chemokine ligand 5 (CXCL5), CXCL10, CXCL16, C-C motif chemokine ligand 20 (CCL20), vascular endothelial growth factor-A (VEGF-A), interferon regulatory factor 7 (Irf7), insulin-like growth factor binding protein-4 (IGFBP-4), thrombospondin 1 (Thbs1) and nuclear factor κB subunit 2 (NF-κB2) genes, and downregulated the expression of angiopoietin-like 1 (Angptl1), and neuropilin-1 (Nrp1) genes. Additionally, EGFL8 silencing enhanced the expression of anti-apoptotic molecules, such as B-cell lymphoma-2 (Bcl-2) and Bcl-extra large (Bcl-xL), and that of cell cycle-regulating molecules, such as cyclin-dependent kinase 1 (CDK1), CDK4, CDK6 and cyclin D1. Moreover, gene network analysis revealed that EGFL8 exerted negative effects on VEGF-A gene expression. Hence, the altered expression of several genes associated with EGFL8 expression in cTECs highlights the important physiological processes in which EGFL8 is involved, and provides insight into its biological functions.
Collapse
Affiliation(s)
- Ye Seon Lim
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, Gyeongsangnam‑do 50612, Republic of Korea
| | - Do-Young Lee
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, Gyeongsangnam‑do 50612, Republic of Korea
| | - Hye-Yoon Kim
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, Gyeongsangnam‑do 50612, Republic of Korea
| | - Yejin Ok
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, Gyeongsangnam‑do 50612, Republic of Korea
| | - Seonyeong Hwang
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, Gyeongsangnam‑do 50612, Republic of Korea
| | - Yuseok Moon
- Immune Reconstitution Research Center, Medical Research Institute, Pusan National University School of Medicine, Yangsan, Gyeongsangnam‑do 50612, Republic of Korea
| | - Sik Yoon
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, Gyeongsangnam‑do 50612, Republic of Korea
| |
Collapse
|
11
|
Malarkannan S. Molecular mechanisms of FasL-mediated 'reverse-signaling'. Mol Immunol 2020; 127:31-37. [PMID: 32905906 DOI: 10.1016/j.molimm.2020.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/15/2020] [Accepted: 08/21/2020] [Indexed: 02/07/2023]
Abstract
Effector lymphocytes, including NK and T cells, express FasL. Expression of Fas, the receptor for FasL in tumor cells, renders them susceptible to NK and T cell-mediated killing. The functional relevance of FasL in initiating death signals in tumor cells is well-characterized. However, the cytoplasmic interacting partners and the potential signaling pathways downstream of FasL are far from fully defined. FasL possesses an 81 amino acid long cytoplasmic tail with multiple unique recruitment motifs. We predict multiple interdependent signaling complexes form the core of the 'reverse signaling' downstream of FasL. A direct interaction between the proline-rich domain of FasL and the SH3 domain of PI(3)K-p85α initiates the first pathway. This cascade helps FasL to link to PLC-γ2 via PIP3 or the Akt-dependent activation of mTOR complexes. Independently, a GRB2/GADs-binding PXXP cytoplasmic motif of FasL can initiate a Ras-GTP-dependent PAK1→C-Raf→MEK1/2→ERK1/2 activation. FasL can recruit Fyn via the proline-rich domain leading to the recruitment of ADAP. Through its ability to directly interact with Carma1 and TAK1, ADAP initiates the formation of the Carma1/Bcl10/Malt1-based CBM signalosome that is primarily responsible for inflammatory cytokine production. Here, we explore the conserved cytoplasmic domains of FasL, the potential signaling molecules that interact, and the functional downstream consequences within the effector lymphocytes to define the FasL-mediated 'reverse signaling'.
Collapse
Affiliation(s)
- Subramaniam Malarkannan
- Laboratory of Molecular Immunology and Immunotherapy, Blood Research Institute, BloodCenter of Wisconsin, Milwaukee, WI, United States; Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI, United States; Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States; Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, United States.
| |
Collapse
|
12
|
Lee WH, Seo D, Lim SG, Suk K. Reverse Signaling of Tumor Necrosis Factor Superfamily Proteins in Macrophages and Microglia: Superfamily Portrait in the Neuroimmune Interface. Front Immunol 2019; 10:262. [PMID: 30838001 PMCID: PMC6389649 DOI: 10.3389/fimmu.2019.00262] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 01/30/2019] [Indexed: 12/14/2022] Open
Abstract
The tumor necrosis factor (TNF) superfamily (TNFSF) is a protein superfamily of type II transmembrane proteins commonly containing the TNF homology domain. The superfamily contains more than 20 protein members, which can be released from the cell membrane by proteolytic cleavage. Members of the TNFSF function as cytokines and regulate diverse biological processes, including immune responses, proliferation, differentiation, apoptosis, and embryogenesis, by binding to TNFSF receptors. Many TNFSF proteins are also known to be responsible for the regulation of innate immunity and inflammation. Both receptor-mediated forward signaling and ligand-mediated reverse signaling play important roles in these processes. In this review, we discuss the functional expression and roles of various reverse signaling molecules and pathways of TNFSF members in macrophages and microglia in the central nervous system (CNS). A thorough understanding of the roles of TNFSF ligands and receptors in the activation of macrophages and microglia may improve the treatment of inflammatory diseases in the brain and periphery. In particular, TNFSF reverse signaling in microglia can be exploited to gain further insights into the functions of the neuroimmune interface in physiological and pathological processes in the CNS.
Collapse
Affiliation(s)
- Won-Ha Lee
- BK21 Plus KNU Creative BioResearch Group, School of Life Sciences, Kyungpook National University, Daegu, South Korea
| | - Donggun Seo
- BK21 Plus KNU Biomedical Convergence Program, Department of Pharmacology, School of Medicine, Brain Science & Engineering Institute, Kyungpook National University, Daegu, South Korea
| | - Su-Geun Lim
- BK21 Plus KNU Creative BioResearch Group, School of Life Sciences, Kyungpook National University, Daegu, South Korea
| | - Kyoungho Suk
- BK21 Plus KNU Biomedical Convergence Program, Department of Pharmacology, School of Medicine, Brain Science & Engineering Institute, Kyungpook National University, Daegu, South Korea
| |
Collapse
|
13
|
Localized immune tolerance from FasL-functionalized PLG scaffolds. Biomaterials 2018; 192:271-281. [PMID: 30458362 DOI: 10.1016/j.biomaterials.2018.11.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 11/02/2018] [Accepted: 11/09/2018] [Indexed: 12/13/2022]
Abstract
Intraportal allogeneic islet transplantation has been demonstrated as a potential therapy for type 1 diabetes (T1D). The placement of islets into the liver and chronic immunosuppression to control rejection are two major limitations of islet transplantation. We hypothesize that localized immunomodulation with a novel form of FasL chimeric with streptavidin, SA-FasL, can provide protection and long-term function of islets at an extrahepatic site in the absence of chronic immunosuppression. Allogeneic islets modified with biotin and engineered to transiently display SA-FasL on their surface showed sustained survival following transplantation on microporous scaffolds into the peritoneal fat in combination with a short course (15 days) of rapamycin treatment. The challenges with modifying islets for clinical translation motivated the modification of scaffolds with SA-FasL as an off-the-shelf product. Poly (lactide-co-glycolide) (PLG) was conjugated with biotin and fabricated into particles and subsequently formed into microporous scaffolds to allow for rapid and efficient conjugation with SA-FasL. Biotinylated particles and scaffolds efficiently bound SA-FasL and induced apoptosis in cells expressing Fas receptor (FasR). Scaffolds functionalized with SA-FasL were subsequently seeded with allogeneic islets and transplanted into the peritoneal fat under the short-course of rapamycin treatment. Scaffolds modified with SA-FasL had robust engraftment of the transplanted islets that restored normoglycemia for 200 days. Transplantation without rapamycin or without SA-FasL did not support long-term survival and function. This work demonstrates that scaffolds functionalized with SA-FasL support allogeneic islet engraftment and long-term survival and function in an extrahepatic site in the absence of chronic immunosuppression with significant potential for clinical translation.
Collapse
|
14
|
Temporal protein expression pattern in intracellular signalling cascade during T-cell activation: a computational study. J Biosci 2015; 40:769-89. [PMID: 26564978 DOI: 10.1007/s12038-015-9561-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Various T-cell co-receptor molecules and calcium channel CRAC play a pivotal role in the maintenance of cell's functional responses by regulating the production of effector molecules (mostly cytokines) that aids in immune clearance and also maintaining the cell in a functionally active state. Any defect in these co-receptor signalling pathways may lead to an altered expression pattern of the effector molecules. To study the propagation of such defects with time and their effect on the intracellular protein expression patterns, a comprehensive and largest pathway map of T-cell activation network is reconstructed manually. The entire pathway reactions are then translated using logical equations and simulated using the published time series microarray expression data as inputs. After validating the model, the effect of in silico knock down of co-receptor molecules on the expression patterns of their downstream proteins is studied and simultaneously the changes in the phenotypic behaviours of the T-cell population are predicted, which shows significant variations among the proteins expression and the signalling routes through which the response is propagated in the cytoplasm. This integrative computational approach serves as a valuable technique to study the changes in protein expression patterns and helps to predict variations in the cellular behaviour.
Collapse
|
15
|
Ślebioda TJ, Kmieć Z. Tumour necrosis factor superfamily members in the pathogenesis of inflammatory bowel disease. Mediators Inflamm 2014; 2014:325129. [PMID: 25045210 PMCID: PMC4087264 DOI: 10.1155/2014/325129] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 05/29/2014] [Indexed: 12/13/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a group of inflammatory conditions of the gastrointestinal tract of unclear aetiology of which two major forms are Crohn's disease (CD) and ulcerative colitis (UC). CD and UC are immunologically distinct, although they both result from hyperactivation of proinflammatory pathways in intestines and disruption of intestinal epithelial barrier. Members of the tumour necrosis factor superfamily (TNFSF) are molecules of broad spectrum of activity, including direct disruption of intestinal epithelial barrier integrity and costimulation of proinflammatory functions of lymphocytes. Tumour necrosis factor (TNF) has a well-established pathological role in IBD which also serves as a target in IBD treatment. In this review we discuss the role of TNF and other TNFSF members, notably, TL1A, FasL, LIGHT, TRAIL, and TWEAK, in the pathogenesis of IBD.
Collapse
Affiliation(s)
- Tomasz J. Ślebioda
- Department of Histology, Medical University of Gdańsk, Dębinki 1, 80-211 Gdańsk, Poland
| | - Zbigniew Kmieć
- Department of Histology, Medical University of Gdańsk, Dębinki 1, 80-211 Gdańsk, Poland
| |
Collapse
|
16
|
Brint E, O’Callaghan G, Houston A. Life in the Fas lane: differential outcomes of Fas signaling. Cell Mol Life Sci 2013; 70:4085-99. [PMID: 23579628 PMCID: PMC11113183 DOI: 10.1007/s00018-013-1327-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 03/14/2013] [Accepted: 03/18/2013] [Indexed: 12/11/2022]
Abstract
Fas, also known as CD95 or APO-1, is a member of the tumor necrosis factor/nerve growth factor superfamily. Although best characterized in terms of its apoptotic function, recent studies have identified several other cellular responses emanating from Fas. These responses include migration, invasion, inflammation, and proliferation. In this review, we focus on the diverse cellular outcomes of Fas signaling and the molecular switches identified to date that regulate its pro- and anti-apoptotic functions. Such switches occur at different levels of signal transduction, ranging from the receptor through to cross-talk with other signaling pathways. Factors identified to date including other extracellular signals, proteins recruited to the death-inducing signaling complex, and the availability of different intracellular components of signal transduction pathways. The success of therapeutically targeting Fas will require a better understanding of these pathways, as well as the regulatory mechanisms that determine cellular outcome following receptor activation.
Collapse
Affiliation(s)
- Elizabeth Brint
- Department of Pathology, University College Cork, National University of Ireland, Cork, Ireland
| | - Grace O’Callaghan
- Department of Medicine, University College Cork, National University of Ireland, Cork, Ireland
| | - Aileen Houston
- Department of Medicine, University College Cork, National University of Ireland, Cork, Ireland
| |
Collapse
|
17
|
Gao R, Bhatnagar J, Blau DM, Greer P, Rollin DC, Denison AM, Deleon-Carnes M, Shieh WJ, Sambhara S, Tumpey TM, Patel M, Liu L, Paddock C, Drew C, Shu Y, Katz JM, Zaki SR. Cytokine and chemokine profiles in lung tissues from fatal cases of 2009 pandemic influenza A (H1N1): role of the host immune response in pathogenesis. THE AMERICAN JOURNAL OF PATHOLOGY 2013; 183:1258-1268. [PMID: 23938324 PMCID: PMC7119452 DOI: 10.1016/j.ajpath.2013.06.023] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 06/21/2013] [Accepted: 06/24/2013] [Indexed: 12/18/2022]
Abstract
Pathological studies on fatal cases caused by 2009 pandemic influenza H1N1 virus (2009 pH1N1) reported extensive diffuse alveolar damage and virus infection predominantly in the lung parenchyma. However, the host immune response after severe 2009 pH1N1 infection is poorly understood. Herein, we investigated viral load, the immune response, and apoptosis in lung tissues from 50 fatal cases with 2009 pH1N1 virus infection. The results suggested that 7 of the 27 cytokines/chemokines showed remarkably high expression, including IL-1 receptor antagonist protein, IL-6, tumor necrosis factor-α, IL-8, monocyte chemoattractant protein-1, macrophage inflammatory protein 1-β, and interferon-inducible protein-10 in lung tissues of 2009 pH1N1 fatal cases. Viral load, which showed the highest level on day 7 of illness onset and persisted until day 17 of illness, was positively correlated with mRNA levels of IL-1 receptor antagonist protein, monocyte chemoattractant protein-1, macrophage inflammatory protein 1-β, interferon-inducible protein-10, and regulated on activation normal T-cell expressed and secreted. Apoptosis was evident in lung tissues stained by the TUNEL assay. Decreased Fas and elevated FasL mRNA levels were present in lung tissues, and cleaved caspase-3 was frequently seen in pneumocytes, submucosal glands, and lymphoid tissues. The pathogenesis of the 2009 pH1N1 virus infection is associated with viral replication and production of proinflammatory mediators. FasL and caspase-3 are involved in the pathway of 2009 pH1N1 virus-induced apoptosis in lung tissues, and the disequilibrium between the Fas and FasL level in lung tissues could contribute to delayed clearance of the virus and subsequent pathological damages.
Collapse
Affiliation(s)
- Rongbao Gao
- Department of Influenza, State Key Laboratory for Molecular Virology and Genetic Engineering, Chinese National Influenza Center, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Julu Bhatnagar
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Dianna M Blau
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Patricia Greer
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Dominique C Rollin
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Amy M Denison
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Marlene Deleon-Carnes
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Wun-Ju Shieh
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Suryaprakash Sambhara
- Immunology and Pathogenesis Branch, the Influenza Division, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Terrence M Tumpey
- Immunology and Pathogenesis Branch, the Influenza Division, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Mitesh Patel
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Lindy Liu
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Christopher Paddock
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Clifton Drew
- Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Yuelong Shu
- Department of Influenza, State Key Laboratory for Molecular Virology and Genetic Engineering, Chinese National Influenza Center, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Jacqueline M Katz
- Immunology and Pathogenesis Branch, the Influenza Division, the Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Sherif R Zaki
- Department of Influenza, State Key Laboratory for Molecular Virology and Genetic Engineering, Chinese National Influenza Center, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China; Infectious Diseases Pathology Branch, the Division of High-Consequence Pathogens and Pathology, the Centers for Disease Control and Prevention, Atlanta, Georgia.
| |
Collapse
|
18
|
Zhao H, Guo M, Sun X, Sun W, Hu H, Wei L, Ai H. Effects of recombinant human granulocyte colony-stimulating factor on central and peripheral T lymphocyte reconstitution after sublethal irradiation in mice. JOURNAL OF RADIATION RESEARCH 2013; 54:83-91. [PMID: 23001765 PMCID: PMC3534283 DOI: 10.1093/jrr/rrs082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 08/16/2012] [Accepted: 08/16/2012] [Indexed: 06/01/2023]
Abstract
Granulocyte colony-stimulating factor (G-CSF) is one of the most critical cytokines used for the treatment of acute radiation syndrome (ARS). In addition to the hematopoietic effects of G-CSF on the differentiation and proliferation of myeloid progenitor cells, G-CSF is also known to have immunomodulatory effects. The aim of the present study was to investigate whether G-CSF could accelerate central and peripheral T lymphocyte recovery after a sublethal dose of irradiation. Female BALB/c mice were subjected to 6 Gy of total body irradiation and then were treated with either 100 μg/kg G-CSF or an equal volume of PBS once daily for 14 days. Percentages of thymocyte subpopulations including CD4 - CD8 - , CD4 + CD8 + , CD4 + CD8- and CD4 - CD8+ T cells, peripheral CD3 + , CD4+ and CD8+ cells were analyzed by flow cytometry. Recent thymic emigrants (RTEs) were assessed by real-time polymerase chain reaction (PCR) using primers specific to the 257-bp T cell receptor rearrangement excision circles (sjTRECs). The proliferative capacity of splenic mononuclear cells upon exposure to ConA was measured by using the Cell Count Kit-8 (CCK-8). G-CSF treatment promoted thymocyte regeneration, accelerated the recovery of CD4 + CD8+ cells and increased the frequency of thymocyte sjTRECs. These effects were more prominent at early time points (Day 28) after irradiation. G-CSF also increased the rate of recovery of peripheral CD3 + , CD4+ and CD8+ cells and shortened the period of severe lymphopenia following irradiation. G-CSF also increased the splenic mononuclear cell mitotic responsiveness to ConA more than control-treated cells. Our results show that G-CSF accelerates T cell recovery through both thymic-dependent and thymic-independent pathways, which could be used to increase the rate of immune reconstitution after sublethal irradiation.
Collapse
Affiliation(s)
- Hongxia Zhao
- Department of Hematology, Affiliated Hospital to the Academy of Military Medicine Science, 8th, East Street, FengTai District, Beijing, China
| | - Mei Guo
- Department of Hematology, Affiliated Hospital to the Academy of Military Medicine Science, 8th, East Street, FengTai District, Beijing, China
| | - Xuedong Sun
- Department of Hematology, Affiliated Hospital to the Academy of Military Medicine Science, 8th, East Street, FengTai District, Beijing, China
| | - Wanjun Sun
- Department of Hematology, the Second Artillery General Hospital, 16th, Xinjiekouwaidajie Road, XiCheng District, Beijing, China
| | - Hailan Hu
- Department of Hematology, the Second Artillery General Hospital, 16th, Xinjiekouwaidajie Road, XiCheng District, Beijing, China
| | - Li Wei
- Third Department of Internal Medicine, General Hospital of Tibet Military Region, Lhasa, China
| | - Huisheng Ai
- Department of Hematology, Affiliated Hospital to the Academy of Military Medicine Science, 8th, East Street, FengTai District, Beijing, China
| |
Collapse
|
19
|
Stimulation of FasL induces production of proinflammatory mediators through activation of mitogen-activated protein kinases and nuclear factor-κB in THP-1 cells. Inflammation 2012; 35:1-10. [PMID: 21152963 DOI: 10.1007/s10753-010-9283-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
FasL is a member of the tumor necrosis factor (TNF) superfamily involved in the various immune reactions such as activation-induced cell death, cytotoxic effector function, and establishment of immune privileged sites through its interaction with Fas. On the other hand, FasL is known to transmit a reverse signal that serves as a T cell co-stimulatory signal. However, the role of FasL-mediated reverse signaling in macrophage function has not been investigated. In order to investigate the presence of FasL-mediated signaling in macrophages, the human macrophage-like cell line THP-1 was analyzed after treatment with FasL ligating agents such as recombinant Fas:Fc fusion protein or anti-FasL monoclonal antibody. Stimulation of FasL induced the expression of proinflammatory mediators such as matrix metalloproteinase-9, TNF-α, and IL-8. The specificity of the reaction was confirmed by the transfection of the FasL-specific siRNAs, which suppressed FasL expression as well as the production of proinflammatory mediators. Utilization of various inhibitors of signaling adaptors and ELISA-base nuclear factor (NF)-κB binding assay demonstrated that the signaling initiated from FasL is mediated by mitogen-activated protein kinases including extracellular signal-regulated kinase, p38, and c-Jun N-terminal kinase which induce subsequent activation of NF-κB. These data indicate that membrane expression of FasL and its interaction with its counterpart may contribute to the inflammatory activation of macrophages during immune reactions or pathogenesis of chronic inflammatory diseases.
Collapse
|
20
|
Hamad ARAR, Arcara K, Uddin S, Donner T. The potential of Fas ligand (apoptosis-inducing molecule) as an unconventional therapeutic target in type 1 diabetes. Front Immunol 2012; 3:196. [PMID: 22807927 PMCID: PMC3395106 DOI: 10.3389/fimmu.2012.00196] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 06/21/2012] [Indexed: 01/10/2023] Open
Abstract
The development of type 1 diabetes (T1D) is driven by autoreactive T cells that attack and destroy the insulin-producing β-cells in pancreatic islets, forcing patients to take multiple daily insulin injections. Insulin therapy, however, is not a cure and diabetic patients often develop serious long-term microvascular and cardiovascular complications. Therefore, intensive efforts are being directed toward developing safe immunotherapy for the disease that does not impair host defense and preserves β-cells, leading to better glycemic control than exogenous insulin therapy. Engineering therapies that differentially cripple or tolerate autoreactive diabetogenic T cells while sparing protective T cells necessary for maintaining a competent immune system has proven challenging. Instead, recent efforts have focused on modulating or resetting the immune system through global but transient deletion of T cells or B cells using anti-CD3 or anti-CD20 mAb, respectively. However, phase III clinical trials have shown promising but modest efficacy so far with these approaches. Therefore, there is a need to identify novel biological targets that do not fit the classic properties of being involved in adaptive immune cell activation. In this prospective, we provide preclinical evidence that targeting Fas ligand (FasL) may provide a unique opportunity to prevent or cure T1D and perhaps other organ-specific autoimmune diseases without causing immune suppression. Unlike conventional targets that are involved in T and B lymphocyte activation (such as CD3 and CD20, respectively), FasL is an apoptosis-inducing surface molecule that triggers cell death by binding to Fas (also known as CD95 Apo-1). Therefore, targeting FasL is not expected to cause immune suppression, the Achilles Heel of conventional approaches. We will discuss the hypothesis that targeting FasL has unique benefits that are not offered by current immunomodulatory approaches.
Collapse
Affiliation(s)
- Abdel Rahim A R Hamad
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore,MD, USA
| | | | | | | |
Collapse
|
21
|
Niu FN, Zhang X, Hu XM, Chen J, Chang LL, Li JW, Liu Z, Cao W, Xu Y. Targeted mutation of Fas ligand gene attenuates brain inflammation in experimental stroke. Brain Behav Immun 2012; 26:61-71. [PMID: 21802508 DOI: 10.1016/j.bbi.2011.07.235] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2011] [Revised: 07/14/2011] [Accepted: 07/14/2011] [Indexed: 01/10/2023] Open
Abstract
Inflammation is an important contributing mechanism in ischemic brain injury. The current study elucidates a previously unexplored role of Fas ligand (FasL) in post-stroke inflammatory responses that is independent of its well-known effect in triggering apoptosis. Focal cerebral ischemia was induced for 2 h by right middle cerebral artery occlusion (MCAO) in FasL mutant (gld) and wild-type mice. FasL mutation profoundly reduced brain damage and improved neurological performance from 6 to 72 h after ischemic stroke. The production of inflammatory cytokines in the brain was attenuated in gld mice after ischemia in the absence of dramatic change in inflammatory cell apoptosis. FasL mutation attenuated the recruitment of peripheral inflammatory cells (neutrophil) and inhibited the activation of residential glial cells (microglia and astrocyte). FasL mutation reduced CD8(+) T cells and turned the Th1/Th2 balance towards Th2 in the brain and peripheral blood after cerebral ischemia. In contrast to cerebral ischemia, the molecular and cellular inflammatory changes induced by intracerebroventricular injection of lipopolysaccharide (LPS) were also attenuated in gld mice. Moreover, the soluble FasL (sFasL) and phospho-SAPK/JNK were decreased in gld mice, suggesting that the inflammatory role of FasL in experimental stroke might relate to sFasL and the c-Jun N-terminal kinase (JNK) signaling pathway. Taken together, our data suggest a novel role of FasL in the damaging inflammatory responses associated with cerebral ischemia. Neutralization of FasL may be a novel therapeutic strategy to suppress post-stroke inflammation and improve the long-term outcomes of stroke.
Collapse
Affiliation(s)
- Feng-nan Niu
- Department of Neurology, Drum Tower Hospital of Nanjing Medical University, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Yuan K, Jing G, Chen J, Liu H, Zhang K, Li Y, Wu H, McDonald JM, Chen Y. Calmodulin mediates Fas-induced FADD-independent survival signaling in pancreatic cancer cells via activation of Src-extracellular signal-regulated kinase (ERK). J Biol Chem 2011; 286:24776-84. [PMID: 21613217 DOI: 10.1074/jbc.m110.202804] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Pancreatic cancer remains a devastating malignancy with a poor prognosis and is largely resistant to current therapies. To understand the resistance of pancreatic tumors to Fas death receptor-induced apoptosis, we investigated the molecular mechanisms of Fas-activated survival signaling in pancreatic cancer cells. We found that knockdown of the Fas-associated protein with death domain (FADD), the adaptor that mediates downstream signaling upon Fas activation, rendered Fas-sensitive MiaPaCa-2 and BxPC-3 pancreatic cells resistant to Fas-induced apoptosis. By contrast, Fas activation promoted the survival of the FADD knockdown MiaPaCa-2 and BxPC-3 cells in a concentration-dependent manner. The pharmacological inhibitor of ERK, PD98059, abrogated Fas-promoted cell survival in FADD knockdown MiaPaCa-2 and BxPC-3 cells. Furthermore, increased phosphorylation of Src was demonstrated to mediate Fas-induced ERK activation and cell survival. Immunoprecipitation of Fas in the FADD knockdown cells identified the presence of increased calmodulin, Src, and phosphorylated Src in the Fas-associated protein complex upon Fas activation. Trifluoperazine, a calmodulin antagonist, inhibited Fas-induced recruitment of calmodulin, Src, and phosphorylated Src. Consistently, trifluoperazine blocked Fas-promoted cell survival. A direct interaction of calmodulin and Src and their binding site were identified with recombinant proteins. These results support an essential role of calmodulin in mediating Fas-induced FADD-independent activation of Src-ERK signaling pathways, which promote survival signaling in pancreatic cancer cells. Understanding the molecular mechanisms responsible for the resistance of pancreatic cells to apoptosis induced by Fas-death receptor signaling may provide molecular insights into designing novel therapies to treat pancreatic tumors.
Collapse
Affiliation(s)
- Kaiyu Yuan
- Departments of Pathology, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Pro- and anti-apoptotic CD95 signaling in T cells. Cell Commun Signal 2011; 9:7. [PMID: 21477291 PMCID: PMC3090738 DOI: 10.1186/1478-811x-9-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Accepted: 04/08/2011] [Indexed: 12/20/2022] Open
Abstract
The TNF receptor superfamily member CD95 (Fas, APO-1, TNFRSF6) is known as the prototypic death receptor in and outside the immune system. In fact, many mechanisms involved in apoptotic signaling cascades were solved by addressing consequences and pathways initiated by CD95 ligation in activated T cells or other "CD95-sensitive" cell populations. As an example, the binding of the inducible CD95 ligand (CD95L) to CD95 on activated T lymphocytes results in apoptotic cell death. This activation-induced cell death was implicated in the control of immune cell homeostasis and immune response termination. Over the past years, however, it became evident that CD95 acts as a dual function receptor that also exerts anti-apoptotic effects depending on the cellular context. Early observations of a potential non-apoptotic role of CD95 in the growth control of resting T cells were recently reconsidered and revealed quite unexpected findings regarding the costimulatory capacity of CD95 for primary T cell activation. It turned out that CD95 engagement modulates TCR/CD3-driven signal initiation in a dose-dependent manner. High doses of immobilized CD95 agonists or cellular CD95L almost completely silence T cells by blocking early TCR-induced signaling events. In contrast, under otherwise unchanged conditions, lower amounts of the same agonists dramatically augment TCR/CD3-driven activation and proliferation. In the present overview, we summarize these recent findings with a focus on the costimulatory capacity of CD95 in primary T cells and discuss potential implications for the T cell compartment and the interplay between T cells and CD95L-expressing cells including antigen-presenting cells.
Collapse
|
24
|
Lettau M, Paulsen M, Schmidt H, Janssen O. Insights into the molecular regulation of FasL (CD178) biology. Eur J Cell Biol 2010; 90:456-66. [PMID: 21126798 DOI: 10.1016/j.ejcb.2010.10.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 10/07/2010] [Accepted: 10/08/2010] [Indexed: 01/26/2023] Open
Abstract
Fas ligand (FasL, CD95L, APO-1L, CD178, TNFSF6, APT1LG1) is the key death factor of receptor-triggered programmed cell death in immune cells. FasL/Fas-dependent apoptosis plays a pivotal role in activation-induced cell death, termination of immune responses, elimination of autoreactive cells, cytotoxic effector function of T and NK cells, and the establishment of immune privilege. Deregulation or functional impairment of FasL threatens the maintenance of immune homeostasis and defense and results in severe autoimmunity. In addition, FasL has been implicated as an accessory or costimulatory receptor in T cell activation. The molecular mechanisms underlying this reverse signaling capacity are, however, poorly understood and still controversially discussed. Many aspects of FasL biology have been ascribed to selective protein-protein interactions mediated by a unique polyproline region located in the membrane-proximal intracellular part of FasL. Over the past decade, we and others identified a large number of putative FasL-interacting molecules that bind to this polyproline stretch via Src homology 3 or WW domains. Individual interactions were analyzed in more detail and turned out to be crucial for the lysosomal storage, the transport and the surface appearance of the death factor and potentially also for reverse signaling. This review summarizes the work in the framework of the Collaborative Research Consortium 415 (CRC 415) and provides facts and hypotheses about FasL-interacting proteins and their potential role in FasL biology.
Collapse
Affiliation(s)
- Marcus Lettau
- Christian-Albrechts-University, Institute of Immunology, D-24105 Kiel, Germany.
| | | | | | | |
Collapse
|
25
|
Gorbachev AV, Fairchild RL. CD4+CD25+ regulatory T cells utilize FasL as a mechanism to restrict DC priming functions in cutaneous immune responses. Eur J Immunol 2010; 40:2006-15. [PMID: 20405474 DOI: 10.1002/eji.200939387] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Recent studies have suggested Fas-mediated elimination of antigen-presenting cells as an important mechanism down-regulating the induction of autoimmune responses. It remains unknown whether this mechanism restricts the magnitude of immune responses to non-self antigens. We used a mouse model of a cutaneous CD8(+) T-cell-mediated immune response (contact hypersensitivity, CHS) to test if CD4(+)CD25(+) T cells expressing FasL regulate hapten-specific effector CD8(+) T cell expansion through the elimination of Fas-expressing hapten-presenting DC. In WT mice, attenuation of CD4(+)CD25(+) T regulatory cell activity by anti-CD25 mAb increased hapten-presenting DC numbers in skin-draining LN, which led to increased effector CD8(+) T-cell priming for CHS responses. In contrast, CD4(+)CD25(+) T cells did not regulate hapten-specific CD8(+) T-cell priming and CHS responses initiated by Fas-defective (lpr) DC. Thus, restricting DC priming functions through Fas-FasL interactions is a potent mechanism employed by CD4(+)CD25(+) regulatory cells to restrict CD8(+) T-cell-mediated allergic immune responses in the skin.
Collapse
Affiliation(s)
- Anton V Gorbachev
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, OH, USA.
| | | |
Collapse
|
26
|
Olson MR, Russ BE, Doherty PC, Turner SJ. The role of epigenetics in the acquisition and maintenance of effector function in virus-specific CD8 T cells. IUBMB Life 2010; 62:519-26. [PMID: 20552633 DOI: 10.1002/iub.351] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CD8(+) T cells are critical for protecting the body from infectious disease. To achieve this protection, CD8(+) T cells must undergo a highly involved process of differentiation that involves the activation of naïve/quiescent cells followed by robust rounds of cell division and the acquisition of effector functions that mediate viral clearance. After the pathogen is eliminated, a small number of these cells survive into long-lived memory and maintain the capacity to respond rapidly and reacquire effector function after secondary exposure to their cognate antigen. This review focuses on how CD8(+) T cells acquire and regulate effector functions and how the capacity to produce effector molecules is maintained into memory.
Collapse
Affiliation(s)
- Matthew R Olson
- Department of Microbiology and Immunology, University of Melbourne, Parkville, VIC, Australia.
| | | | | | | |
Collapse
|
27
|
The distribution and intracellular location of Fas and Fas Ligand following gastric carcinogenesis: Fas Ligand expressing gastric carcinoma cells can inhibit local immune response. Mol Cell Biochem 2009; 331:181-6. [DOI: 10.1007/s11010-009-0156-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Accepted: 04/29/2009] [Indexed: 10/20/2022]
|
28
|
Olson MR, Varga SM. Fas ligand is required for the development of respiratory syncytial virus vaccine-enhanced disease. THE JOURNAL OF IMMUNOLOGY 2009; 182:3024-31. [PMID: 19234198 DOI: 10.4049/jimmunol.0803585] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Children immunized with a formalin-inactivated respiratory syncytial virus (RSV) vaccine experienced enhanced disease and exhibited pulmonary eosinophilia upon natural RSV infection. BALB/c mice immunized with either formalin-inactivated RSV or a recombinant vaccinia virus (vacv) expressing the RSV attachment (G) protein develop extensive pulmonary eosinophilia after RSV challenge that mimics the eosinophilic response observed in the children during the 1960s vaccine trials. Fas ligand (FasL) is a major immune effector molecule that can contribute to the clearance of respiratory viruses. However, the role of FasL in the development of RSV vaccine-enhanced disease has not been elucidated. RSV challenge of vacvG-immunized gld mice, that lack functional FasL, results in diminished systemic disease as well as pulmonary eosinophilia. The magnitude of the secondary RSV G-specific CD4 T cell response was diminished in gld mice as compared with wild-type controls. Furthermore, we show that CD4 T cells isolated after RSV challenge of vacvG-immunized gld mice exhibit enhanced expression of Annexin V and caspase 3/7 indicating that FasL is important for either the survival or the expansion of virus-specific secondary effector CD4 T cells. Taken together, these data identify a previously undefined role for FasL in the accumulation of secondary effector CD4 T cells and the development of RSV vaccine-enhanced disease.
Collapse
Affiliation(s)
- Matthew R Olson
- Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA
| | | |
Collapse
|
29
|
Paulsen M, Mathew B, Qian J, Lettau M, Kabelitz D, Janssen O. FasL cross-linking inhibits activation of human peripheral T cells. Int Immunol 2009; 21:587-98. [PMID: 19332441 DOI: 10.1093/intimm/dxp028] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Activation of resting T cells in vitro is triggered by combined TCR and CD28 engagement and can be modulated by simultaneous ligation of various other surface receptors. Although the Fas ligand (FasL) is best known for its capacity to initiate cell death in Fas-bearing cells, it has recently been implicated in the regulation of T cell activation. Thus, a cross-talk between the TCR and FasL is likely, but far from being biochemically elucidated. We now report that FasL engagement by immobilized but not soluble FasFc fusion protein and anti-FasL polyclonal antibody blocks the activation of human peripheral T cells even in the presence of CD28 co-stimulation. The data presented here stress the importance of the Fas/FasL system for signal initiation via the TCR-CD3 complex and provide further arguments for a retrograde signaling capacity of FasL or a crucial role of Fas as a co-stimulatory molecule.
Collapse
Affiliation(s)
- Maren Paulsen
- Institute of Immunology, University Hospital Schleswig-Holstein Campus Kiel, Arnold-Heller-Strasse 3, Building 17, D-24105 Kiel, Germany
| | | | | | | | | | | |
Collapse
|
30
|
Wilson NS, Dixit V, Ashkenazi A. Death receptor signal transducers: nodes of coordination in immune signaling networks. Nat Immunol 2009; 10:348-55. [DOI: 10.1038/ni.1714] [Citation(s) in RCA: 506] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
31
|
Postthymic maturation influences the CD8 T cell response to antigen. Proc Natl Acad Sci U S A 2009; 106:4799-804. [PMID: 19270077 DOI: 10.1073/pnas.0812354106] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Complete T cell development requires postthymic maturation, and we investigated the influence of this ontological period on the CD8 T cell response to infection by comparing responses of mature CD8 T cells with those of recent thymic emigrants (RTEs). When activated with a noninflammatory stimulus or a bacterial or viral pathogen, CD8 RTEs generated a lower proportion of cytokine-producing effector cells and long-lived memory precursors compared with their mature counterparts. Although peripheral T cell maturation is complete within several weeks after thymic egress, RTE-derived memory cells continued to express inappropriate levels of memory cell markers and display an altered pattern of cytokine production, even 8 weeks after infection. When rechallenged, RTE-derived memory cells generated secondary effector cells that were phenotypically and functionally equivalent to those generated by their mature counterparts. The defects at the effector and memory stages were not associated with differences in the expression of T cell receptor-, costimulation-, or activation-associated cell surface markers yet were associated with lower Ly6C expression levels at the effector stage. This work demonstrates that the stage of postthymic maturation influences cell fate decisions and cytokine profiles of stimulated CD8 T cells, with repercussions that are apparent long after cells have progressed from the RTE compartment.
Collapse
|
32
|
Wei J, DeAngulo G, Sun W, Hussain SF, Vasquez H, Jordan J, Weinberg J, Wolff J, Koshkina N, Heimberger AB. Topotecan enhances immune clearance of gliomas. Cancer Immunol Immunother 2009; 58:259-70. [PMID: 18594817 PMCID: PMC11030728 DOI: 10.1007/s00262-008-0550-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2007] [Accepted: 06/12/2008] [Indexed: 11/28/2022]
Abstract
Despite aggressive surgery, radiation therapy, and chemotherapy, glioblastoma multiforme (GBM) is refractory to therapy, recurs quickly, and results in a median survival time of only 14 months. The modulation of the apoptotic receptor Fas with cytotoxic agents could potentiate the response to therapy. However, Fas ligand (FasL) is not expressed in the brain and therefore this Fas-inducing cell death mechanism cannot be utilized. Vaccination of patients with gliomas has shown promising responses. In animal studies, brain tumors of vaccinated mice were infiltrated with activated T cells. Since activated immune cells express FasL, we hypothesized that combination of immunotherapy with chemotherapy can activate Fas signaling, which could be responsible for a synergistic or additive effect of the combination. When we treated the human glioma cell line U-87 and GBM tumor cells isolated from patients with TPT, Fas was up regulated. Subsequent administration of soluble Fas ligand (sFasL) to treated cells significantly increased their cell death indicating that these Fas receptors were functional. Similar effect was observed when CD3(+) T cells were used as a source of the FasL, indicating that the up regulated Fas expression on glioma cells increases their susceptibility to cytotoxic T cell killing. This additive effect was not observed when glioma cells were pre-treated with temozolomide, which was unable to increase Fas expression in tumor. Inhibition of FasL activity with the antagonistic antibody Nok-1 mitigated these effects confirming that these responses were specifically mediated by the Fas-FasL interaction. Furthermore, the CD3(+) T cells co-cultured with topotecan treated U-87 and autologous GBM tumor cells showed a significant increase in expression in IFN-gamma, a key cytokine produced by activated T cells, and accordingly enhanced tumor cytotoxicity. Based on our data we conclude that drugs, such as topotecan, which cause up regulation of Fas on glioma cells can be potentially exploited with immunotherapy to enhance immune clearance of tumors via Fas signaling.
Collapse
Affiliation(s)
- Jun Wei
- Department of Neurosurgery, Unit 442, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Guillermo DeAngulo
- Department of Pediatrics, Unit 87, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Wei Sun
- Department of Neurosurgery, Unit 442, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Sakina F. Hussain
- Department of Neurosurgery, Unit 442, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Hernan Vasquez
- Department of Pediatrics, Unit 87, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Justin Jordan
- Department of Neurosurgery, Unit 442, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Jeffery Weinberg
- Department of Neurosurgery, Unit 442, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Johannes Wolff
- Department of Pediatrics, Unit 87, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Nadya Koshkina
- Department of Pediatrics, Unit 87, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| | - Amy B. Heimberger
- Department of Neurosurgery, Unit 442, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030 USA
| |
Collapse
|
33
|
Puliaeva I, Puliaev R, Shustov A, Haas M, Via CS. Fas expression on antigen-specific T cells has costimulatory, helper, and down-regulatory functions in vivo for cytotoxic T cell responses but not for T cell-dependent B cell responses. THE JOURNAL OF IMMUNOLOGY 2009; 181:5912-29. [PMID: 18941180 DOI: 10.4049/jimmunol.181.9.5912] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Fas-mediated apoptosis is an important contributor to contraction of Ag-driven T cell responses acting only on activated Ag-specific T cells. The effects of targeted Fas deletion on selected cell populations are well described however little is known regarding the consequences of Fas deletion on only activated Ag-specific T cells. We addressed this question using the parent-into-F(1) (P-->F(1)) model of acute or chronic (lupus-like) graft-vs-host disease (GVHD) as a model of either a CTL-mediated or T-dependent B cell-mediated response, respectively. By transferring Fas-deficient lpr donor T cells into Fas-intact F(1) hosts, the in vivo role of Ag-specific T cell Fas can be determined. Our results demonstrate a novel dichotomy of Ag-specific T cell Fas function in that: 1) Fas expression on Ag-activated T cells has costimulatory, helper, and down-regulatory roles in vivo and 2) these roles were observed only in a CTL response (acute GVHD) and not in a T-dependent B cell response (chronic GVHD). Specifically, CD4 T cell Fas expression is important for optimal CD4 initial expansion and absolutely required for help for CD8 effector CTL. Donor CD8 T cell Fas expression played an important but not exclusive role in apoptosis and down-regulation. By contrast, CD4 Fas expression played no detectable role in modulating chronic GVHD induction or disease expression. These results demonstrate a novel role for Ag-specific T cell Fas expression in in vivo CTL responses and support a review of the paradigm by which Fas deficiency accelerates lupus in MRL/lpr lupus-prone mice.
Collapse
Affiliation(s)
- Irina Puliaeva
- Department of Pathology, Uniformed Services University of Health Sciences, Bethesda, MD 20814, USA
| | | | | | | | | |
Collapse
|
34
|
Lettau M, Paulsen M, Kabelitz D, Janssen O. FasL expression and reverse signalling. Results Probl Cell Differ 2009; 49:49-61. [PMID: 19132323 DOI: 10.1007/400_2008_21] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
FasL plays a central role in the induction of apoptosis within the immune system. It mediates activation-induced cell death (AICD) of T lymphocytes and contributes to the cytotoxic effector function of T and NK cells. Moreover, FasL is discussed as direct effector molecule for the establishment of immune privilege and tumour survival. Besides its death-promoting activity, FasL has been implicated in reverse signalling and might thus also play a role in T cell development and selection and the modulation of T cell activation. Considering these diverse functions, the overall FasL expression has to be tightly controlled to avoid unwanted damage. Based on an activation-associated transcriptional control, several post-transcriptional processes ensure a safe storage, a rapid mobilisation, a target-directed activity and a subsequent inactivation. Over the past years, the identification and characterisation of FasL-interacting proteins provided novel insight into the mechanisms of FasL transport, processing and reverse signalling, which might be exemplary also for the other members of the TNF family.
Collapse
Affiliation(s)
- M Lettau
- Institute of Immunology, University Hospital Schleswig-Holstein Campus Kiel, Michaelisstr. 5, D-24105 Kiel, Germany
| | | | | | | |
Collapse
|
35
|
Gough MJ, Weinberg AD. OX40 (CD134) and OX40L. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2009; 647:94-107. [PMID: 19760068 DOI: 10.1007/978-0-387-89520-8_6] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The interaction between OX40 and OX40L plays an important role in antigen-specific T-cell expansion and survival. While OX40 is expressed predominantly on T-lymphocytes early after antigen activation, OX40L is expressed on activated antigen presenting cells and endothelial cells within acute inflammatory environments. We discuss here how ligation of OX40 by OX40L leads to enhanced T-cell survival, along with local inflammatory responses that appear critical for both effective T-cell mediated responses and chronic immune pathologies. We describe how interventions that block or mimic the OX40-OX40L interaction can be applied to treat autoimmune diseases or enhance anti-tumor immune responses. The clinically relevant properties of these agents emphasize the importance of this particular TNFSF-TNFSF in health and disease.
Collapse
Affiliation(s)
- Michael J Gough
- Robert W. Franz Cancer Center, Earle A. Chiles Research Institute, Providence Portland Medical Center, Portland, OR, 97213, USA
| | | |
Collapse
|
36
|
Voss M, Lettau M, Paulsen M, Janssen O. Posttranslational regulation of Fas ligand function. Cell Commun Signal 2008; 6:11. [PMID: 19114018 PMCID: PMC2647539 DOI: 10.1186/1478-811x-6-11] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Accepted: 12/29/2008] [Indexed: 12/29/2022] Open
Abstract
The TNF superfamily member Fas ligand acts as a prototypic death factor. Due to its ability to induce apoptosis in Fas (APO-1, CD95) expressing cells, Fas ligand participates in essential effector functions of the immune system. It is involved in natural killer cell- and T cell-mediated cytotoxicity, the establishment of immune privilege, and in termination of immune responses by induction of activation-induced cell death. In addition, Fas ligand-positive tumours may evade immune surveillance by killing Fas-positive tumour-infiltrating cells. Given these strong cytotoxic capabilities of Fas ligand, it is obvious that its function has to be strictly regulated to avoid uncontrolled damage. In hematopoietic cells, the death factor is stored in secretory lysosomes and is mobilised to the immunological synapse only upon activation. The selective sorting to and the release from this specific lysosomal compartment requires interactions of the Fas ligand cytosolic moiety, which mediates binding to various adapter proteins involved in trafficking and cytoskeletal reorganisation. In addition, Fas ligand surface expression is further regulated by posttranslational ectodomain shedding and subsequent regulated intramembrane proteolysis, releasing a soluble ectodomain cytokine into the extracellular space and an N-terminal fragment with a potential role in intracellular signalling processes. Moreover, other posttranslational modifications of the cytosolic domain, including phosphorylation and ubiquitylation, have been described to affect various aspects of Fas ligand biology. Since FasL is regarded as a potential target for immunotherapy, the further characterisation of its biological regulation and function will be of great importance for the development and evaluation of future therapeutic strategies.
Collapse
Affiliation(s)
- Matthias Voss
- Molecular Immunology, Institute of Immunology, Medical Center Schleswig-Holstein Campus Kiel, Arnold-Heller-Str, 3, Bldg, 17, D-24105 Kiel, Germany.
| | | | | | | |
Collapse
|
37
|
Yolcu ES, Ash S, Kaminitz A, Sagiv Y, Askenasy N, Yarkoni S. Apoptosis as a mechanism of T‐regulatory cell homeostasis and suppression. Immunol Cell Biol 2008; 86:650-8. [DOI: 10.1038/icb.2008.62] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Esma S Yolcu
- Department of Microbiology and Immunology, Institute for Cellular Therapeutics, University of LouisvilleLouisvilleKYUSA
| | - Shifra Ash
- Frankel Laboratory for Experimental Bone Marrow Transplantation, Center for Stem Cell Research, Schneider Children's Medical Center of IsraelPetach TikvaIsrael
| | - Ayelet Kaminitz
- Frankel Laboratory for Experimental Bone Marrow Transplantation, Center for Stem Cell Research, Schneider Children's Medical Center of IsraelPetach TikvaIsrael
| | | | - Nadir Askenasy
- Frankel Laboratory for Experimental Bone Marrow Transplantation, Center for Stem Cell Research, Schneider Children's Medical Center of IsraelPetach TikvaIsrael
| | | |
Collapse
|
38
|
Dudani R, Russell M, van Faassen H, Krishnan L, Sad S. Mutation in the Fas pathway impairs CD8+ T cell memory. THE JOURNAL OF IMMUNOLOGY 2008; 180:2933-41. [PMID: 18292515 DOI: 10.4049/jimmunol.180.5.2933] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Fas death pathway is important for lymphocyte homeostasis, but the role of Fas pathway in T cell memory development is not clear. We show that whereas the expansion and contraction of CD8+ T cell response against Listeria monocytogenes were similar for wild-type (WT) and Fas ligand (FasL) mutant mice, the majority of memory CD8+ T cells in FasL mutant mice displayed an effector memory phenotype in the long-term in comparison with the mainly central memory phenotype displayed by memory CD8+ T cells in WT mice. Memory CD8+ T cells in FasL mutant mice expressed reduced levels of IFN-gamma and displayed poor homeostatic and Ag-induced proliferation. Impairment in CD8+ T cell memory in FasL mutant hosts was not due to defective programming or the expression of mutant FasL on CD8+ T cells, but was caused by perturbed cytokine environment in FasL mutant mice. Although adoptively transferred WT memory CD8+ T cells mediated protection against L. monocytogenes in either the WT or FasL mutant hosts, FasL mutant memory CD8+ T cells failed to mediate protection even in WT hosts. Thus, in individuals with mutation in Fas pathway, impairment in the function of the memory CD8+ T cells may increase their susceptibility to recurrent/latent infections.
Collapse
Affiliation(s)
- Renu Dudani
- National Research Council of Canada, Institute for Biological Sciences, Ottawa, Ontario, Canada
| | | | | | | | | |
Collapse
|
39
|
Kavurma MM, Tan NY, Bennett MR. Death receptors and their ligands in atherosclerosis. Arterioscler Thromb Vasc Biol 2008; 28:1694-702. [PMID: 18669890 DOI: 10.1161/atvbaha.107.155143] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Atherosclerosis is characterized by the accumulation of a fibro-fatty plaque consisting of immune cells, vascular smooth muscle cells (VSMCs), vascular endothelial cells (ECs), and extracellular matrix, surrounding a lipid-rich core. The complexity of atherosclerosis is highlighted by the multifaceted effects that apoptosis and proliferation of specific cell types can have on vessels at different stages of the disease. Death receptors are membrane-bound protein complexes that on binding their cognate ligand, activate an intracellular signaling cascade that results in apoptosis. More recently, signaling from these receptors has been shown to activate multiple other processes, including cell proliferation. This review summarizes our current understanding of signaling events after death receptor activation and the role of death receptors and their ligands in atherosclerosis.
Collapse
Affiliation(s)
- Mary M Kavurma
- Centre for Vascular Research, The University of New South Wales, Sydney, NSW 2052, Australia.
| | | | | |
Collapse
|
40
|
Loeffler M, Le'Negrate G, Krajewska M, Reed JC. Inhibition of tumor growth using salmonella expressing Fas ligand. J Natl Cancer Inst 2008; 100:1113-6. [PMID: 18664657 PMCID: PMC2496919 DOI: 10.1093/jnci/djn205] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Intravenous administration of bacteria leads to their accumulation in tumors and to sporadic tumor regression. We therefore explored the hypothesis that Salmonella typhimurium engineered to express the proapoptotic cytokine Fas ligand (FasL) would exhibit enhanced antitumor activity. Immunocompetent mice carrying tumors derived from syngeneic murine D2F2 breast carcinoma or CT-26 colon carcinoma cells were treated intravenously with FasL-expressing S. typhimurium or with phosphate-buffered saline (PBS; control). Treatment with FasL-expressing S. typhimurium inhibited growth of primary tumors by an average of 59% for D2F2 tumors and 82% for CT-26 tumors (eg, at 25 days after initial treatment, mean volume of PBS-treated CT-26 colon carcinomas = 1385 mm(3) and of S. typhimurium FasL-treated CT-26 tumors = 243 mm(3), difference = 1142 mm(3), 95% confidence interval = 800 mm(3) to 1484 mm(3), P < .001). Pulmonary D2F2 metastases (as measured by lung weight) were reduced by 34% in S. typhimurium FasL-treated mice compared with PBS-treated mice. FasL-expressing S. typhimurium had similar effects on growth of murine B16 melanoma tumors in wild-type mice but not in lpr/lpr mice, which lack Fas, or in mice with disrupted host inflammatory responses. Antitumor activity was achieved without overt toxicity. These preclinical results raise the possibility that using attenuated S. typhimurium to deliver FasL to tumors may be an effective and well-tolerated therapeutic strategy for some cancers.
Collapse
Affiliation(s)
- Markus Loeffler
- Burnham Institute for Medical Research, 10901 North Torrey Pines Rd, La Jolla, CA 92037, USA
| | | | | | | |
Collapse
|
41
|
Sun M, Lee S, Karray S, Levi-Strauss M, Ames KT, Fink PJ. Cutting Edge: Two Distinct Motifs within the Fas Ligand Tail Regulate Fas Ligand-Mediated Costimulation. THE JOURNAL OF IMMUNOLOGY 2007; 179:5639-43. [DOI: 10.4049/jimmunol.179.9.5639] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
42
|
Sun M, Fink PJ. A New Class of Reverse Signaling Costimulators Belongs to the TNF Family. THE JOURNAL OF IMMUNOLOGY 2007; 179:4307-12. [PMID: 17878324 DOI: 10.4049/jimmunol.179.7.4307] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Recent evidence shows that many molecules of the TNF family serve as counter-receptors, inducing costimulation through reverse signals in addition to delivering signals through their respective TNF receptors. In this review, we will discuss this new class of costimulators with a focus on the mechanism of costimulation transduced by reverse signaling through Fas ligand.
Collapse
Affiliation(s)
- Mingyi Sun
- Department of Immunology, University of Washington, Seattle, WA 98195, USA
| | | |
Collapse
|
43
|
Kirkin V, Cahuzac N, Guardiola-Serrano F, Huault S, Lückerath K, Friedmann E, Novac N, Wels WS, Martoglio B, Hueber AO, Zörnig M. The Fas ligand intracellular domain is released by ADAM10 and SPPL2a cleavage in T-cells. Cell Death Differ 2007; 14:1678-87. [PMID: 17557115 DOI: 10.1038/sj.cdd.4402175] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Fas ligand (FasL) is a type II transmembrane protein belonging to the tumor necrosis factor family. Its binding to the cognate Fas receptor triggers the apoptosis that plays a pivotal role in the maintenance of immune system homeostasis. The cell death-inducing property of FasL has been associated with its extracellular domain, which can be cleaved off by metalloprotease activity to produce soluble FasL. The fate of the remaining membrane-anchored N-terminal part of the FasL molecule has not been determined. Here we show that post-translational processing of overexpressed and endogenous FasL in T-cells by the disintegrin and metalloprotease ADAM10 generates a 17-kDa N-terminal fragment, which lacks the receptor-binding extracellular domain. This FasL remnant is membrane anchored and further processed by SPPL2a, a member of the signal peptide peptidase-like family of intramembrane-cleaving proteases. SPPL2a cleavage liberates a smaller and highly unstable fragment mainly containing the intracellular FasL domain (FasL ICD). We show that this fragment translocates to the nucleus and is capable of inhibiting gene transcription. With ADAM10 and SPPL2a we have identified two proteases implicated in FasL processing and release of the FasL ICD, which has been shown to be important for retrograde FasL signaling.
Collapse
Affiliation(s)
- V Kirkin
- Chemotherapeutisches Forschungsinstitut Georg-Speyer-Haus, Paul-Ehrlich-Strasse 42-44, 60596 Frankfurt, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Abstract
1,25-Dihydroxyvitamin D3(1,25(OH)2D3), the active form of vitamin D3, is a central player in Ca and bone metabolism. More recently, important immunomodulatory effects have been attributed to this hormone. By binding to its receptor, the vitamin D receptor, 1,25(OH)2D3regulates the expression of various genes and consequently affects the behaviour of different cell types within the immune system. 1,25(OH)2D3can potently inhibit pathogenic T cells and gives rise to elevated numbers of regulatory T cells via the induction of tolerogenic dendritic cells. These immunomodulatory activities of 1,25(OH)2D3have also been proven usefulin vivo: administration of 1,25(OH)2D3in several animal models can prevent or cure different autoimmune diseases and graft rejection. To overcome the dose-limiting side effects of 1,25(OH)2D3on Ca and bone, less calcaemic structural analogues (alone or in combination with synergistically acting drugs or bone-resorption inhibitors) have been successfully used in animal models. Furthermore, as 1,25(OH)2D3also contributes to host defence against infectious agents by the induction of antimicrobial responses, this molecule might provide a new strategy to deal with drug-resistant infections. According to the pleiotropic effects of 1,25(OH)2D3in the immune system, increasing epidemiological data underline the importance of adequate vitamin D intakes in reducing the risk of several autoimmune diseases and infections such as tuberculosis.
Collapse
|
45
|
Chen J, Hsu HC, Zajac AJ, Wu Q, Yang P, Xu X, McPherson SA, Li J, Curiel DT, Mountz JD. In vivo analysis of adenovirus-specific cytotoxic T lymphocyte response in mice deficient in CD28, fas ligand, and perforin. Hum Gene Ther 2006; 17:669-82. [PMID: 16776575 DOI: 10.1089/hum.2006.17.669] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Adenoviruses (Ad) have been extensively studied as gene delivery vectors in gene therapy and as vaccine carriers. The cell-mediated cytotoxicity induced by Ad is of great interest in both applications. However, the mechanism underlying Ad-specific cytotoxic T lymphocyte (CTL) generation and effector function remains unclear. In this study, we used a novel MHC class I tetramer and an in vivo CTL assay to examine the role of CD28, perforin, Fas ligand (FasL), and TNF-alpha in the generation and function of Ad-specific CTLs in vivo. During the primary response, there was a significant defect in both the generation and in vivo effector function of Ad-specific CTLs in CD28-/- mice, but not in CD4+ T cell-depleted mice or CD4-/- mice. The relative role of CTL effector molecules was assayed by in vivo CTL assay in perforin- or FasL-mutant mice, using donor cells from Fas-deficient or TNFR1/TNFR2-deficient mice. The results indicated that the in vivo CTL activity is mediated mainly by perforin. In the absence of perforin, production of FasL, but not TNF-alpha, by the CTLs results in lower level Ad-specific killing of target cells. These results provide important implications concerning the development of safe and effective Ad vectors for gene therapy and vaccines.
Collapse
Affiliation(s)
- Jian Chen
- Department of Medicine, University of Alabama at Birmingham, and Veterans Administration Medical Center, Birmingham, AL 35294, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Sun M, Ames KT, Suzuki I, Fink PJ. The cytoplasmic domain of Fas ligand costimulates TCR signals. THE JOURNAL OF IMMUNOLOGY 2006; 177:1481-91. [PMID: 16849454 DOI: 10.4049/jimmunol.177.3.1481] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Productive T cell activation generally requires costimulation in addition to a signal delivered through the TCR. Although FasL is well-characterized for its capacity to deliver a death signal through Fas, this TNF family member can also transmit a reverse signal to enhance Ag-driven T cell proliferation. In this study, we define this reverse signal through FasL as costimulation by showing it requires TCR coengagement and is CD28 independent. We demonstrate that FasL-mediated costimulation drives FasL recruitment into lipid rafts and association with select Src homology 3 (SH3)-containing proteins. We further show that the proline-rich intracellular domain of FasL is sufficient to costimulate by enhancing the phosphorylation of Akt, ERK1/2, JNK, and FasL itself, by activating the transcription factors NFAT and AP-1, and by enhancing IFN-gamma production. These results elucidate the pathway of costimulation through the death inducer FasL, and comprise the first mechanistic analysis of a newly emerging group of costimulators, the TNF family.
Collapse
MESH Headings
- Amino Acid Sequence
- Animals
- CD28 Antigens/genetics
- CD28 Antigens/physiology
- CD8-Positive T-Lymphocytes/immunology
- Cells, Cultured
- Cytoplasm/chemistry
- Cytoplasm/immunology
- Fas Ligand Protein
- Humans
- Jurkat Cells
- Ligands
- Lymphocyte Activation
- Membrane Glycoproteins/antagonists & inhibitors
- Membrane Glycoproteins/metabolism
- Membrane Glycoproteins/physiology
- Membrane Microdomains/immunology
- Membrane Microdomains/metabolism
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C3H
- Mice, Inbred C57BL
- Mice, Inbred MRL lpr
- Mice, Knockout
- Mice, SCID
- Molecular Sequence Data
- Protein Structure, Tertiary
- Receptors, Antigen, T-Cell/metabolism
- Receptors, Antigen, T-Cell/physiology
- Signal Transduction/immunology
- Tumor Necrosis Factor Inhibitors
- Tumor Necrosis Factors/metabolism
- Tumor Necrosis Factors/physiology
- fas Receptor/metabolism
- src Homology Domains/immunology
Collapse
Affiliation(s)
- Mingyi Sun
- Department of Immunology, University of Washington, Seattle, WA 98195, USA
| | | | | | | |
Collapse
|
47
|
Chen J, Hsu HC, Zajac AJ, Wu Q, Yang P, Xu X, McPherson SA, Li J, Curiel DT, Mountz JD. In Vivo Analysis of Adenovirus-Specific Cytotoxic T Lymphocyte Response in Mice Deficient in CD28, Fas Ligand, and Perforin. Hum Gene Ther 2006. [DOI: 10.1089/hum.2006.17.ft-217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
48
|
Abstract
Using GFP to mark recent thymic emigrants (RTEs) in mice carrying a GFP transgene driven by the recombination-activating gene 2 promoter, we demonstrate that RTEs are readily detectable even in 2-year-old mice, despite the fact that the proportion of the peripheral T cell pool comprised of RTEs declines with age. Although the number of RTEs decreases after reaching a peak at 6 weeks of age, thymic output as a function of thymic size is surprisingly age-independent. The CD4:CD8 ratio of RTEs declines with age, partly because of a striking decrease in steady-state proliferation of CD4+ RTEs in older mice. RTEs in aged mice undergo phenotypic maturation in the lymphoid periphery with delayed kinetics compared with young mice. RTEs from aged mice secrete less IL-2, proliferate less well, and achieve only weak expression of early-activation markers compared with more mature naïve peripheral T cells from the same mice. The proportion of GFP- cells in the CD4+ and CD8+ thymic compartments increases with age, partly as a result of leakiness in the aged thymus, allowing reentry of naïve peripheral T cells.
Collapse
Affiliation(s)
- J. Scott Hale
- Department of Immunology, University of Washington, Seattle, WA 98195
| | | | - Gail L. Turk
- Department of Immunology, University of Washington, Seattle, WA 98195
| | - Pamela J. Fink
- Department of Immunology, University of Washington, Seattle, WA 98195
- To whom correspondence should be addressed at:
Department of Immunology, University of Washington, 1959 NE Pacific Street, Campus Box 357650, Seattle, WA 98195. E-mail:
| |
Collapse
|
49
|
Cahuzac N, Baum W, Kirkin V, Conchonaud F, Wawrezinieck L, Marguet D, Janssen O, Zörnig M, Hueber AO. Fas ligand is localized to membrane rafts, where it displays increased cell death–inducing activity. Blood 2006; 107:2384-91. [PMID: 16282344 DOI: 10.1182/blood-2005-07-2883] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
AbstractFas ligand (FasL), a member of the TNF protein family, potently induces cell death by activating its matching receptor Fas. Fas-mediated killing plays a critical role in naturally and pathologically occurring cell death, including development and homeostasis of the immune system. In addition to its receptor-interacting and cell death–inducing extracellular domain, FasL has a well-conserved intracellular portion with a proline-rich SH3 domain–binding site probably involved in non-apoptotic functions. We report here that, as with the Fas receptor, a fraction of FasL is constitutively localized in rafts. These dynamic membrane microdomains, enriched in sphingolipids and cholesterol, are important for cell signaling and trafficking processes. We show that FasL is partially localized in rafts and that increased amounts of FasL are found in rafts after efficient FasL/Fas receptor interactions. Raft disorganization after cholesterol oxidase treatment and deletions within the intracellular FasL domain diminish raft partitioning and, most important, lead to decreased FasL killing. We conclude that FasL is recruited into lipid rafts for maximum Fas receptor contact and cell death–inducing potency. These findings raise the possibility that certain pathologic conditions may be treated by altering the cell death–inducing capability of FasL with drugs affecting its raft localization.
Collapse
Affiliation(s)
- Nathalie Cahuzac
- Institute of Signaling, Developmental Biology and Cancer Research, CNRS UMR 6543, 06189 Nice, France
| | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Pasqualetto V, Vasseur F, Zavala F, Schneider E, Ezine S. Fas receptor signaling is requisite for B cell differentiation. J Leukoc Biol 2006; 78:1106-17. [PMID: 16266974 DOI: 10.1189/jlb.0105047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The Fas/Fas ligand (FasL) pathway has been largely implicated in the homeostasis of mature cells. However, it is still unclear whether it plays a role at the progenitor level. To address this issue, we created chimeric mice by transferring C57BL/6 bone marrow (BM) cells of the lpr (Fas-FasL+) or gld (Fas+FasL-) genotype into Rag-2-/- hosts of the same genetic background. In this model, the consequences of a deficient Fas/FasL pathway on lymphoid differentiation could be evaluated without endogenous competition. Analysis of the chimerism revealed a differential sensitivity of hematopoietic lineages to the lack of Fas receptor signaling. While donor-derived myelo-monocytic cells were similarly distributed in all chimeric mice, mature B cells were deleted in the BM and the spleen of lpr chimera, leading to the absence of the marginal zone (MZ) as detected by immunohistology. In contrast, B cell hematopoiesis was complete in gld chimera but MZ macrophages undetectable. These defects suggest a direct and determinant dual role of FasL regulation in negative selection of B cells and in maintenance of the MZ.
Collapse
|