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Research progress on the role of Ndfip1 (Nedd4 family interacting protein 1) in immune cells. Allergol Immunopathol (Madr) 2023; 51:77-83. [PMID: 36617825 DOI: 10.15586/aei.v51i1.739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/23/2022] [Indexed: 01/03/2023]
Abstract
Nedd4 family interacting protein 1 (Ndfip1) was first mentioned in an article in 2000. Since its discovery, related studies have shown that this protein is associated with apoptosis, neuroprotection, substance transport, ubiquitination, and immune regulation. It is noteworthy that the lack of Ndfip1 can lead to death in fetal mice. Researchers generally believe that the function of Ndfip1 is closely related to individual immune capacity and have published a large number of articles. However, a comprehensive classification of the immune regulatory function of Ndfip1 is still lacking. In this review, we will overview and discuss this new perspective, focusing on the role of Ndfip1 in the proliferation, differentiation, and cell activity of CD4+ T cells, CD8+ T cells, mast cells, and eosinophils. This review provides an updated summary of Ndfip1, which will unveil novel therapeutic targets. Finally, the conclusion is that Ndfip1 mainly plays a negative regulatory role in immune cells by maintaining the stability of the immune response and limiting its overexpression.
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Wagle MV, Marchingo JM, Howitt J, Tan SS, Goodnow CC, Parish IA. The Ubiquitin Ligase Adaptor NDFIP1 Selectively Enforces a CD8 + T Cell Tolerance Checkpoint to High-Dose Antigen. Cell Rep 2019; 24:577-584. [PMID: 30021156 DOI: 10.1016/j.celrep.2018.06.060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 05/17/2018] [Accepted: 06/12/2018] [Indexed: 01/11/2023] Open
Abstract
Escape from peripheral tolerance checkpoints that control cytotoxic CD8+ T cells is important for cancer immunotherapy and autoimmunity, but pathways enforcing these checkpoints are mostly uncharted. We reveal that the HECT-type ubiquitin ligase activator, NDFIP1, enforces a cell-intrinsic CD8+ T cell checkpoint that desensitizes TCR signaling during in vivo exposure to high antigen levels. Ndfip1-deficient OT-I CD8+ T cells responding to high exogenous tolerogenic antigen doses that normally induce anergy aberrantly expanded and differentiated into effector cells that could precipitate autoimmune diabetes in RIP-OVAhi mice. In contrast, NDFIP1 was dispensable for peripheral deletion to low-dose exogenous or pancreatic islet-derived antigen and had little impact upon effector responses to Listeria or acute LCMV infection. These data provide evidence that NDFIP1 mediates a CD8+ T cell tolerance checkpoint, with a different mechanism to CD4+ T cells, and indicates that CD8+ T cell deletion and anergy are molecularly separable checkpoints.
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Affiliation(s)
- Mayura V Wagle
- John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia; Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Julia M Marchingo
- Division of Immunology, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, The University of Melbourne, Parkville, VIC, Australia
| | - Jason Howitt
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, Australia; Department of Health and Medical Sciences, Swinburne University, Melbourne, VIC, Australia
| | - Seong-Seng Tan
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, Australia
| | - Christopher C Goodnow
- John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia; Garvan Institute of Medical Research, Sydney, NSW, Australia; St Vincent's Clinical School, University of New South Wales, Sydney, NSW, Australia.
| | - Ian A Parish
- John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia; Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.
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Moser EK, Roof J, Dybas JM, Spruce LA, Seeholzer SH, Cancro MP, Oliver PM. The E3 ubiquitin ligase Itch restricts antigen-driven B cell responses. J Exp Med 2019; 216:2170-2183. [PMID: 31311822 PMCID: PMC6719427 DOI: 10.1084/jem.20181953] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 05/10/2019] [Accepted: 06/17/2019] [Indexed: 01/27/2023] Open
Abstract
The E3 ubiquitin ligase Itch regulates antibody levels and prevents autoimmune disease in humans and mice, yet how Itch regulates B cell fate or function is unknown. We now show that Itch directly limits B cell activity. While Itch-deficient mice displayed normal numbers of preimmune B cell populations, they showed elevated numbers of antigen-experienced B cells. Mixed bone marrow chimeras revealed that Itch acts within B cells to limit naive and, to a greater extent, germinal center (GC) B cell numbers. B cells lacking Itch exhibited increased proliferation, glycolytic capacity, and mTORC1 activation. Moreover, stimulation of these cells in vivo by WT T cells resulted in elevated numbers of GC B cells, PCs, and serum IgG. These results support a novel role for Itch in limiting B cell metabolism and proliferation to suppress antigen-driven B cell responses.
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Affiliation(s)
- Emily K Moser
- Children's Hospital of Philadelphia, Philadelphia, PA
| | | | | | - Lynn A Spruce
- Children's Hospital of Philadelphia, Philadelphia, PA
| | | | | | - Paula M Oliver
- Children's Hospital of Philadelphia, Philadelphia, PA .,University of Pennsylvania, Philadelphia, PA
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Grywalska E, Pasiarski M, Góźdź S, Roliński J. Immune-checkpoint inhibitors for combating T-cell dysfunction in cancer. Onco Targets Ther 2018; 11:6505-6524. [PMID: 30323625 PMCID: PMC6177399 DOI: 10.2147/ott.s150817] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Under normal conditions, the immune system responds effectively to both external and internal threats without damaging healthy tissues. Cells undergoing a neoplastic transformation are one such threat. An efficient activation of T cells is enabled by T-cell receptor (TCR) interactions with antigen-presenting class I and class II molecules of the major histocompatibility complex (MHC), co-stimulatory molecules, and cytokines. After threatening stimuli are removed from the body, the host's immune response ceases, which prevents tissue damage or chronic inflammation. The recognition of foreign antigens is highly selective, which requires multistep regulation to avoid reactions against the antigens of healthy cells. This multistep regulation includes central and peripheral tolerance toward the body's own antigens. Here, we discuss T-cell dysfunction, which leads to poor effector function against foreign antigens, including cancer. We describe selected cellular receptors implicated in T-cell dysfunction and discuss how immune-checkpoint inhibitors can help overcome T-cell dysfunction in cancer treatment.
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Affiliation(s)
- Ewelina Grywalska
- Department of Clinical Immunology and Immunotherapy, Medical University of Lublin, Lublin, Poland,
| | - Marcin Pasiarski
- Department of Hematology, Holy Cross Oncology Center of Kielce, Kielce, Poland.,Faculty of Health Sciences, Jan Kochanowski University, Kielce, Poland
| | - Stanisław Góźdź
- Faculty of Health Sciences, Jan Kochanowski University, Kielce, Poland.,Department of Oncology, Holy Cross Oncology Center of Kielce, Kielce, Poland
| | - Jacek Roliński
- Department of Clinical Immunology and Immunotherapy, Medical University of Lublin, Lublin, Poland,
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Layman AAK, Deng G, O'Leary CE, Tadros S, Thomas RM, Dybas JM, Moser EK, Wells AD, Doliba NM, Oliver PM. Ndfip1 restricts mTORC1 signalling and glycolysis in regulatory T cells to prevent autoinflammatory disease. Nat Commun 2017; 8:15677. [PMID: 28580955 PMCID: PMC5465375 DOI: 10.1038/ncomms15677] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 04/19/2017] [Indexed: 12/12/2022] Open
Abstract
Foxp3+ T regulatory (Treg) cells suppress immune cell activation and establish normal immune homeostasis. How Treg cells maintain their identity is not completely understood. Here we show that Ndfip1, a coactivator of Nedd4-family E3 ubiquitin ligases, is required for Treg cell stability and function. Ndfip1 deletion in Treg cells results in autoinflammatory disease. Ndfip1-deficient Treg cells are highly proliferative and are more likely to lose Foxp3 expression to become IL-4-producing TH2 effector cells. Proteomic analyses indicate altered metabolic signature of Ndfip1-deficient Treg cells and metabolic profiling reveals elevated glycolysis and increased mTORC1 signalling. Ndfip1 restricts Treg cell metabolism and IL-4 production via distinct mechanisms, as IL-4 deficiency does not prevent hyperproliferation or elevated mTORC1 signalling in Ndfip1-deficient Treg cells. Thus, Ndfip1 preserves Treg lineage stability and immune homeostasis by preventing the expansion of highly proliferative and metabolically active Treg cells and by preventing pathological secretion of IL-4 from Treg cells.
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Affiliation(s)
- Awo Akosua Kesewa Layman
- Medical Scientist Training Program, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Biomedical Graduate Studies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Guoping Deng
- Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Claire E. O'Leary
- Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Samuel Tadros
- Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Rajan M. Thomas
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Joseph M. Dybas
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Emily K. Moser
- Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Andrew D. Wells
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Nicolai M. Doliba
- Institute for Diabetes, Obesity, and Metabolism, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
| | - Paula M. Oliver
- Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
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Kesewa Layman AA, L. Sprout S, Phillips D, Oliver PM. Ndfip1 restricts Th17 cell potency by limiting lineage stability and proinflammatory cytokine production. Sci Rep 2017; 7:39649. [PMID: 28051111 PMCID: PMC5209687 DOI: 10.1038/srep39649] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 11/24/2016] [Indexed: 02/07/2023] Open
Abstract
While Th17 cells can protect against colonization by pathogenic organisms, they also have the potential to become pathogenic and promote autoimmune and inflammatory diseases. Mechanisms that control their pathogenic potential remain poorly understood. Here we show that Ndfip1, a co-activator of the E3 ubiquitin ligase Itch, restricts the frequency and pathogenicity of Th17 cells. Mice lacking Ndfip1 have increased numbers of Th17 cells, and this increase is cell intrinsic. We found that Ndfip1 restricts production of the proinflammatory cytokines in Th17 cells. Increased cytokine production correlated with reduced degradation and accumulation of RORγT. When transferred in vivo, Th17 cells lacking Ndfip1 were more likely to maintain their ability to make IL-17, were more potent proinflammatory cytokine producers, and were powerful inducers of colitis. Together our data support an essential role for Ndfip1 in degrading RORγT and suppressing Th17 lineage stability, proinflammatory cytokine production, and pathogenicity.
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Affiliation(s)
- Awo Akosua Kesewa Layman
- Medical Scientist Training Program, Perelman School of Medicine at the University of Pennsylvania, 3400 Civic Center Boulevard, Building 421, Philadelphia, PA 19104, USA
- Biomedical graduate Studies, Immunology Graduate Group, 357 Biomedical Research Building II/III, 421 Curie Boulevard, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Stephanie L. Sprout
- The Children’s Hospital of Philadelphia, Cell Pathology Division, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Dylan Phillips
- The Children’s Hospital of Philadelphia, Cell Pathology Division, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Paula M. Oliver
- The Children’s Hospital of Philadelphia, Cell Pathology Division, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, 3400 Civic Center Boulevard, Building 421, Philadelphia, PA 19104, USA
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Yip KH, Kolesnikoff N, Hauschild N, Biggs L, Lopez AF, Galli SJ, Kumar S, Grimbaldeston MA. The Nedd4-2/Ndfip1 axis is a negative regulator of IgE-mediated mast cell activation. Nat Commun 2016; 7:13198. [PMID: 27786273 PMCID: PMC5095291 DOI: 10.1038/ncomms13198] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 09/11/2016] [Indexed: 11/24/2022] Open
Abstract
Cross-linkage of the high-affinity immunoglobulin E (IgE) receptor (FcɛRI) on mast cells by antigen ligation has a critical role in the pathology of IgE-dependent allergic disorders, such as anaphylaxis and asthma. Restraint of intracellular signal transduction pathways that promote release of mast cell-derived pro-inflammatory mediators is necessary to dampen activation and restore homoeostasis. Here we show that the ligase Nedd4-2 and the adaptor Ndfip1 (Nedd4 family interacting protein 1) limit the intensity and duration of IgE-FcɛRI-induced positive signal transduction by ubiquitinating phosphorylated Syk, a tyrosine kinase that is indispensable for downstream FcɛRI signalosome activity. Importantly, loss of Nedd4-2 or Ndfip1 in mast cells results in exacerbated and prolonged IgE-mediated cutaneous anaphylaxis in vivo. Our findings reveal an important negative regulatory function for Nedd4-2 and Ndfip1 in IgE-dependent mast cell activity. Aberrant activation of the IgE receptor on mast cells leads to allergic responses. Here, the authors identify an E3 ligase and adaptor protein that can reduce IgE signalling by targeting phosphorylated-Syk for degradation.
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Affiliation(s)
- Kwok Ho Yip
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5000, Australia
| | - Natasha Kolesnikoff
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5000, Australia
| | - Nicholas Hauschild
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5000, Australia
| | - Lisa Biggs
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5000, Australia
| | - Angel F Lopez
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5000, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Stephen J Galli
- Departments of Pathology and of Microbiology and Immunology, and the Sean N. Parker Center for Allergy and Asthma Research, Stanford University School of Medicine, Stanford, California 94305-5176, USA
| | - Sharad Kumar
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5000, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Michele A Grimbaldeston
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5000, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia 5005, Australia.,OMNI-Biomarker Development, Genentech Inc., South San Francisco, California 94080, USA
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8
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O'Leary CE, Riling CR, Spruce LA, Ding H, Kumar S, Deng G, Liu Y, Seeholzer SH, Oliver PM. Ndfip-mediated degradation of Jak1 tunes cytokine signalling to limit expansion of CD4+ effector T cells. Nat Commun 2016; 7:11226. [PMID: 27088444 PMCID: PMC4837450 DOI: 10.1038/ncomms11226] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 02/29/2016] [Indexed: 12/02/2022] Open
Abstract
Nedd4 family E3 ubiquitin ligases have been shown to restrict T-cell function and impact T-cell differentiation. We show here that Ndfip1 and Ndfip2, activators of Nedd4 family ligases, together limit accumulation and function of effector CD4+ T cells. Using a three-part proteomics approach in primary T cells, we identify stabilization of Jak1 in Ndfip1/2-deficient T cells stimulated through the TCR. Jak1 degradation is aborted in activated T cells that lack Ndfips. In wild-type cells, Jak1 degradation lessens CD4+ cell sensitivity to cytokines during TCR stimulation, while in Ndfip-deficient cells cytokine responsiveness persists, promoting increased expansion and survival of pathogenic effector T cells. Thus, Ndfip1/Ndfip2 regulate the cross talk between the T-cell receptor and cytokine signalling pathways to limit inappropriate T-cell responses. Ndfip1 is an activator of Itch E3 ubiquitin ligase that limits T cell activation. Here the authors identify Jak1 in a proteomic screen for Ndfip dependent substrates, and show that Ndfip1/2 double-deficient T cells have reduced degradation of Jak1 and as a result are hyper-responsive to cytokine stimulation.
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Affiliation(s)
- Claire E O'Leary
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Christopher R Riling
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Lynn A Spruce
- Department of Pathology and Laboratory Medicine, Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Hua Ding
- Department of Pathology and Laboratory Medicine, Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | | | - Guoping Deng
- Department of Pathology and Laboratory Medicine, Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Yuhong Liu
- Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Steven H Seeholzer
- Department of Pathology and Laboratory Medicine, Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Paula M Oliver
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.,Department of Pathology and Laboratory Medicine, Cell Pathology Division, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
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Lin Z, Lin Q, Liao Z, Li Q, Zhang F, Wei Q, Cao S, Gu J. Higher Percentage of CD3+CD154+ T Lymphocytes Predicts Efficacy of TNF-α Inhibitors in Active Axial SpA Patients. Inflammation 2014; 37:2056-61. [DOI: 10.1007/s10753-014-9938-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kurzweil V, LaRoche A, Oliver PM. Increased peripheral IL-4 leads to an expanded virtual memory CD8+ population. THE JOURNAL OF IMMUNOLOGY 2014; 192:5643-51. [PMID: 24795452 DOI: 10.4049/jimmunol.1301755] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Memory-phenotype CD8(+) T cells can arise even in the absence of overt Ag stimulation. Virtual memory (VM) CD8(+) T cells are CD8(+) T cells that develop a memory phenotype in the periphery of wild-type mice in an IL-15-dependent manner. Innate CD8(+) T cells, in contrast, are memory-phenotype CD8(+) T cells that develop in the thymus in response to elevated thymic IL-4. It is not clear whether VM cells and innate CD8(+) T cells represent two independent T cell lineages or whether they arise through similar processes. In this study, we use mice deficient in Nedd4-family interacting protein 1 to show that overproduction of IL-4 in the periphery leads to an expanded VM population. Nedd4-family interacting protein 1(-/-) CD4(+) T cells produce large amounts of IL-4 due to a defect in JunB degradation. This IL-4 induces a memory-like phenotype in peripheral CD8(+) T cells that includes elevated expression of CD44, CD122, and Eomesodermin and decreased expression of CD49d. Thus, our data show that excess peripheral IL-4 is sufficient to cause an increase in the VM population. Our results suggest that VM and innate CD8(+) T cells may be more similar than previously appreciated.
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Affiliation(s)
- Vanessa Kurzweil
- Cell and Molecular Biology Program, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; and
| | - Ami LaRoche
- Cell Pathology Division, Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA 19104
| | - Paula M Oliver
- Cell and Molecular Biology Program, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; and Cell Pathology Division, Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA 19104
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Ndfip1 mediates peripheral tolerance to self and exogenous antigen by inducing cell cycle exit in responding CD4+ T cells. Proc Natl Acad Sci U S A 2014; 111:2067-74. [PMID: 24520172 DOI: 10.1073/pnas.1322739111] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The NDFIP1 (neural precursor cell expressed, developmentally down-regulated protein 4 family-interacting protein 1) adapter for the ubiquitin ligase ITCH is genetically linked to human allergic and autoimmune disease, but the cellular mechanism by which these proteins enable foreign and self-antigens to be tolerated is unresolved. Here, we use two unique mouse strains--an Ndfip1-YFP reporter and an Ndfip1-deficient strain--to show that Ndfip1 is progressively induced during T-cell differentiation and activation in vivo and that its deficiency causes a cell-autonomous, Forkhead box P3-independent failure of peripheral CD4(+) T-cell tolerance to self and exogenous antigen. In small cohorts of antigen-specific CD4(+) cells responding in vivo, Ndfip1 was necessary for tolerogen-reactive T cells to exit cell cycle after one to five divisions and to abort Th2 effector differentiation, defining a step in peripheral tolerance that provides insights into the phenomenon of T-cell anergy in vivo and is distinct from the better understood process of Bcl2-interacting mediator of cell death-mediated apoptosis. Ndfip1 deficiency precipitated autoimmune pancreatic destruction and diabetes; however, this depended on a further accumulation of nontolerant anti-self T cells from strong stimulation by exogenous tolerogen. These findings illuminate a peripheral tolerance checkpoint that aborts T-cell clonal expansion against allergens and autoantigens and demonstrate how hypersensitive responses to environmental antigens may trigger autoimmunity.
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