1
|
Sigdel TK, Sur S, Boada P, McDermott SM, Arlehamn CSL, Murray KO, Bockenstedt LK, Kerwin M, Reed EF, Harris E, Stuart K, Peters B, Sesma A, Montgomery RR, Sarwal MM. Proteome Analysis for Inflammation Related to Acute and Convalescent Infection. Inflammation 2024; 47:346-362. [PMID: 37831367 PMCID: PMC10799112 DOI: 10.1007/s10753-023-01913-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/30/2023] [Accepted: 09/24/2023] [Indexed: 10/14/2023]
Abstract
Infectious diseases are a significant burden in global healthcare. Pathogens engage with different host defense mechanisms. However, it is currently unknown if there are disease-specific immune signatures and/or if different pathogens elicit common immune-associated molecular entities to common therapeutic interventions. We studied patients enrolled through the Human Immunology Project Consortium (HIPC), which focuses on immune responses to various infections. Blood samples were collected and analyzed from patients during infection and follow-up time points at the convalescent stage. The study included samples from patients with Lyme disease (LD), tuberculosis (TB), malaria (MLA), dengue virus (DENV), and West Nile virus (WNV), as well as kidney transplant patients with cytomegalovirus (CMV) and polyomavirus (BKV) infections. Using an antibody-based assay, we quantified ~ 350 cell surface markers, cytokines, and chemokines involved in inflammation and immunity. Unique protein signatures were identified specific to the acute phase of infection irrespective of the pathogen type, with significant changes during convalescence. In addition, tumor necrosis factor receptor superfamily member 6 (TNR6), C-C Motif Chemokine Receptor 7 (CCR7), and C-C motif chemokine ligand-1 (CCL1) were increased in the acute and convalescent phases across all viral, bacterial, and protozoan compared to blood from healthy donors. Furthermore, despite the differences between pathogens, proteins were enriched in common biological pathways such as cell surface receptor signaling pathway and response to external stimulus. In conclusion, we demonstrated that irrespective of the pathogen type, there are common immunoregulatory and proinflammatory signals.
Collapse
Affiliation(s)
- Tara K Sigdel
- Division of Multi-Organ Transplantation, Department of Surgery, University of California San Francisco, 513 Parnassus Ave, Med Sciences Bldg, Room S1268, San Francisco, CA, 94143, USA
| | - Swastika Sur
- Division of Multi-Organ Transplantation, Department of Surgery, University of California San Francisco, 513 Parnassus Ave, Med Sciences Bldg, Room S1268, San Francisco, CA, 94143, USA
| | - Patrick Boada
- Division of Multi-Organ Transplantation, Department of Surgery, University of California San Francisco, 513 Parnassus Ave, Med Sciences Bldg, Room S1268, San Francisco, CA, 94143, USA
| | | | - Cecilia S Lindestam Arlehamn
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
- La Jolla Institute for Immunology, La Jolla, CA, USA
| | | | | | - Maggie Kerwin
- Division of Multi-Organ Transplantation, Department of Surgery, University of California San Francisco, 513 Parnassus Ave, Med Sciences Bldg, Room S1268, San Francisco, CA, 94143, USA
| | - Elaine F Reed
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Eva Harris
- University of California Berkeley, Berkeley, CA, USA
| | - Ken Stuart
- Seattle Children Research Institute, Seattle, WA, USA
| | - Bjoern Peters
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
- La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Ana Sesma
- Mount Sinai School of Medicine, New York, NY, USA
| | | | - Minnie M Sarwal
- Division of Multi-Organ Transplantation, Department of Surgery, University of California San Francisco, 513 Parnassus Ave, Med Sciences Bldg, Room S1268, San Francisco, CA, 94143, USA.
| |
Collapse
|
2
|
Ferrando-Martinez S, Snell Bennett A, Lino E, Gehring AJ, Feld J, Janssen HLA, Robbins SH. Functional Exhaustion of HBV-Specific CD8 T Cells Impedes PD-L1 Blockade Efficacy in Chronic HBV Infection. Front Immunol 2021; 12:648420. [PMID: 34589081 PMCID: PMC8473828 DOI: 10.3389/fimmu.2021.648420] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 08/24/2021] [Indexed: 01/12/2023] Open
Abstract
Background A functional cure for chronic HBV could be achieved by boosting HBV-specific immunity. In vitro studies show that immunotherapy could be an effective strategy. However, these studies include strategies to enrich HBV-specific CD8 T cells, which could alter the expression of the anti-PD-1/anti-PD-L1 antibody targets. Our aim was to determine the efficacy of PD-L1 blockade ex vivo. Methods HBV-specific CD8 T cells were characterized ex vivo by flow cytometry for the simultaneous analysis of six immune populations and 14 activating and inhibitory receptors. Ex vivo functionality was quantified by ELISpot and by combining peptide pool stimulation, dextramers and intracellular flow cytometry staining. Results The functionality of HBV-specific CD8 T cells is associated with a higher frequency of cells with low exhaustion phenotype (LAG3-TIM3-PD-1+), independently of the clinical parameters. The accumulation of HBV-specific CD8 T cells with a functionally exhausted phenotype (LAG3+TIM3+PD-1+) is associated with lack of ex vivo functionality. PD-L1 blockade enhanced the HBV-specific CD8 T cell response only in patients with lower exhaustion levels, while response to PD-L1 blockade was abrogated in patients with higher frequencies of exhausted HBV-specific CD8 T cells. Conclusion Higher levels of functionally exhausted HBV-specific CD8 T cells are associated with a lack of response that cannot be restored by blocking the PD-1:PD-L1 axis. This suggests that the clinical effectiveness of blocking the PD-1:PD-L1 axis as a monotherapy may be restricted. Combination strategies, potentially including the combination of anti-LAG-3 with other anti-iR antibodies, will likely be required to elicit a functional cure for patients with high levels of functionally exhausted HBV-specific CD8 T cells.
Collapse
Affiliation(s)
- Sara Ferrando-Martinez
- Microbial Sciences, Biopharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, United States
| | - Angie Snell Bennett
- Microbial Sciences, Biopharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, United States
| | - Elisabete Lino
- Microbial Sciences, Biopharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, United States
| | - Adam J Gehring
- Toronto Center for Liver Disease, Toronto General Hospital, University Health Network, Toronto, ON, Canada.,Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Jordan Feld
- Toronto Center for Liver Disease, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Harry L A Janssen
- Toronto Center for Liver Disease, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Scott H Robbins
- Late Stage Oncology Development, Oncology R&D, AstraZeneca, Gaithersburg, MD, United States
| |
Collapse
|
3
|
Lamichhane R, Schneider M, de la Harpe SM, Harrop TW, Hannaway RF, Dearden PK, Kirman JR, Tyndall JD, Vernall AJ, Ussher JE. TCR- or Cytokine-Activated CD8+ Mucosal-Associated Invariant T Cells Are Rapid Polyfunctional Effectors That Can Coordinate Immune Responses. Cell Rep 2019; 28:3061-3076.e5. [DOI: 10.1016/j.celrep.2019.08.054] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 07/11/2019] [Accepted: 08/16/2019] [Indexed: 12/22/2022] Open
|
4
|
Feng Y, Livingston-Rosanoff D, Roback L, Sundararajan A, Speck SH, Mocarski ES, Daley-Bauer LP. Remarkably Robust Antiviral Immune Response despite Combined Deficiency in Caspase-8 and RIPK3. THE JOURNAL OF IMMUNOLOGY 2018; 201:2244-2255. [PMID: 30194111 DOI: 10.4049/jimmunol.1800110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 08/08/2018] [Indexed: 01/06/2023]
Abstract
Caspase-8 (Casp8)-mediated signaling triggers extrinsic apoptosis while suppressing receptor-interacting protein kinase (RIPK) 3-dependent necroptosis. Although Casp8 is dispensable for the development of innate and adaptive immune compartments in mice, the importance of this proapoptotic protease in the orchestration of immune response to pathogens remains to be fully explored. In this study, Casp8-/-Ripk3-/- C57BL/6 mice show robust innate and adaptive immune responses to the natural mouse pathogen, murine CMV. When young, these mice lack lpr-like lymphoid hyperplasia and accumulation of either B220 + CD3+ or B220-CD3+CD4+ and CD8+ T cells with increased numbers of immature myeloid cells that are evident in older mice. Dendritic cell activation and cytokine production drive both NK and T cell responses to control viral infection in these mice, suggesting that Casp8 is dispensable to the generation of antiviral host defense. Curiously, NK and T cell expansion is amplified, with greater numbers observed by 7 d postinfection compared with either Casp8+/-Ripk3-/- or wild type (Casp8+/+Ripk3+/+ ) littermate controls. Casp8 and RIPK3 are natural targets of virus-encoded cell death suppressors that prevent infected cell apoptosis and necroptosis, respectively. It is clear from the current studies that the initiation of innate immunity and the execution of cytotoxic lymphocyte functions are all preserved despite the absence of Casp8 in responding cells. Thus, Casp8 and RIPK3 signaling is completely dispensable to the generation of immunity against this natural herpesvirus infection, although the pathways driven by these initiators serve as a crucial first line for host defense within virus-infected cells.
Collapse
Affiliation(s)
- Yanjun Feng
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Devon Livingston-Rosanoff
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Linda Roback
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Aarthi Sundararajan
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Samuel H Speck
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Edward S Mocarski
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Lisa P Daley-Bauer
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| |
Collapse
|
5
|
Tsau JS, Huang X, Lai CY, Hedrick SM. The Effects of Dendritic Cell Hypersensitivity on Persistent Viral Infection. THE JOURNAL OF IMMUNOLOGY 2018; 200:1335-1346. [PMID: 29311359 DOI: 10.4049/jimmunol.1601870] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 12/04/2017] [Indexed: 12/13/2022]
Abstract
Caspase-8 (CASP8) is known as an executioner of apoptosis, but more recent studies have shown that it participates in the regulation of necroptosis and innate immunity. In this study, we show that CASP8 negatively regulates retinoic acid-inducible gene I (RIG-I) signaling such that, in its absence, stimulation of the RIG-I pathway in dendritic cells (DCs) produced modestly enhanced activation of IFN regulatory factor 3 with correspondingly greater amounts of proinflammatory cytokines. In addition, mice lacking DC-specific CASP8 (dcCasp8-/- mice) develop age-dependent symptoms of autoimmune disease characterized by hyperactive DCs and T cells, spleen and liver immunopathology, and the appearance of Th1-polarized CD4+ T cells. Such mice infected with chronic lymphocytic choriomeningitis virus, an RNA virus detected by RIG-I, mounted an enhanced lymphocytic choriomeningitis virus-specific immune response as measured by increased proportions of Ag-specific CD4+ T cells and multicytokine-producing CD4+ and CD8+ T cells. These results show that CASP8 subtly modulates DC maturation, which controls the spontaneous appearance of autoimmune T cells while simultaneously attenuating the acquired immune system and its potential to control a persistent viral infection.
Collapse
Affiliation(s)
- Jennifer S Tsau
- Division of Biological Sciences, Molecular Biology Section, University of California, San Diego, La Jolla, CA 92093; and
| | - Xin Huang
- Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
| | - Chen-Yen Lai
- Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
| | - Stephen M Hedrick
- Division of Biological Sciences, Molecular Biology Section, University of California, San Diego, La Jolla, CA 92093; and .,Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
| |
Collapse
|
6
|
Guégan JP, Legembre P. Nonapoptotic functions of Fas/CD95 in the immune response. FEBS J 2017; 285:809-827. [PMID: 29032605 DOI: 10.1111/febs.14292] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 09/26/2017] [Accepted: 10/11/2017] [Indexed: 12/26/2022]
Abstract
CD95 (also known as Fas) is a member of the tumor necrosis factor receptor (TNFR) superfamily. Its cognate ligand, CD95L, is implicated in immune homeostasis and immune surveillance. Mutations in this receptor are associated with a loss of apoptotic signaling and have been detected in an autoimmune disorder called autoimmune lymphoproliferative syndrome (ALPS) type Ia, which shares some clinical features with systemic lupus erythematosus (SLE). In addition, deletions and mutations of CD95 have been described in many cancers, which led researchers to initially classify this receptor as a tumor suppressor. More recent data demonstrate that CD95 engagement evokes nonapoptotic signals that promote inflammation and carcinogenesis. Transmembrane CD95L (m-CD95L) can be cleaved by metalloproteases, releasing a soluble ligand (s-CD95L). Soluble and membrane-bound CD95L show different stoichiometry (homotrimer versus multimer of homotrimers, respectively), which differentially affects CD95-mediated signaling through molecular mechanisms that remain to be elucidated. This review discusses the biological roles of CD95 in light of recent experiments addressing how a death receptor can trigger both apoptotic and nonapoptotic signaling pathways.
Collapse
Affiliation(s)
- Jean-Philippe Guégan
- Centre Eugène Marquis, INSERM U1242-COSS, Equipe Labellisée Ligue Contre Le Cancer, Rennes, France.,Université de Rennes-1, Rennes, France
| | - Patrick Legembre
- Centre Eugène Marquis, INSERM U1242-COSS, Equipe Labellisée Ligue Contre Le Cancer, Rennes, France.,Université de Rennes-1, Rennes, France
| |
Collapse
|
7
|
Cunningham CR, Champhekar A, Tullius MV, Dillon BJ, Zhen A, de la Fuente JR, Herskovitz J, Elsaesser H, Snell LM, Wilson EB, de la Torre JC, Kitchen SG, Horwitz MA, Bensinger SJ, Smale ST, Brooks DG. Type I and Type II Interferon Coordinately Regulate Suppressive Dendritic Cell Fate and Function during Viral Persistence. PLoS Pathog 2016; 12:e1005356. [PMID: 26808628 PMCID: PMC4726812 DOI: 10.1371/journal.ppat.1005356] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 12/01/2015] [Indexed: 12/21/2022] Open
Abstract
Persistent viral infections are simultaneously associated with chronic inflammation and highly potent immunosuppressive programs mediated by IL-10 and PDL1 that attenuate antiviral T cell responses. Inhibiting these suppressive signals enhances T cell function to control persistent infection; yet, the underlying signals and mechanisms that program immunosuppressive cell fates and functions are not well understood. Herein, we use lymphocytic choriomeningitis virus infection (LCMV) to demonstrate that the induction and functional programming of immunosuppressive dendritic cells (DCs) during viral persistence are separable mechanisms programmed by factors primarily considered pro-inflammatory. IFNγ first induces the de novo development of naive monocytes into DCs with immunosuppressive potential. Type I interferon (IFN-I) then directly targets these newly generated DCs to program their potent T cell immunosuppressive functions while simultaneously inhibiting conventional DCs with T cell stimulating capacity. These mechanisms of monocyte conversion are constant throughout persistent infection, establishing a system to continuously interpret and shape the immunologic environment. MyD88 signaling was required for the differentiation of suppressive DCs, whereas inhibition of stimulatory DCs was dependent on MAVS signaling, demonstrating a bifurcation in the pathogen recognition pathways that promote distinct elements of IFN-I mediated immunosuppression. Further, a similar suppressive DC origin and differentiation was also observed in Mycobacterium tuberculosis infection, HIV infection and cancer. Ultimately, targeting the underlying mechanisms that induce immunosuppression could simultaneously prevent multiple suppressive signals to further restore T cell function and control persistent infections. Persistent virus infections induce host derived immunosuppressive factors that attenuate the immune response and prevent control of infection. Although the mechanisms of T cell exhaustion are being defined, we know surprisingly little about the underlying mechanisms that induce the immunosuppressive state and the origin and functional programming of the cells that deliver these signals to the T cells. We recently demonstrated that type I interferon (IFN-I) signaling was responsible for many of the immune dysfunctions associated with persistent virus infection and in particular the induced expression of the suppressive factors IL-10 and PDL1 by dendritic cells (DCs). Yet, mechanistically how IFN-I signaling specifically generates and programs cells to become immunosuppressive is still unknown. Herein, we define the underlying mechanisms of IFN-I mediated immunosuppression and establish that the induction of factors and the generation of the DCs that express them are separable events integrally reliant on additional inflammatory factors. Further, we demonstrate a similar derivation of the suppressive DCs that emerge in other diseases associated with prolonged inflammation and immunosuppression, specifically in HIV infection, Mycobacterium tuberculosis, and cancer, indicating a conserved origin of immunosuppression and suggesting that targeting the pathways that underlie expression of immunosuppressive cells and factors could be beneficial to treat multiple chronic diseases.
Collapse
Affiliation(s)
- Cameron R. Cunningham
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Ameya Champhekar
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Michael V. Tullius
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Barbara Jane Dillon
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Anjie Zhen
- Division of Hematology and Oncology, Department of Medicine, UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Justin Rafael de la Fuente
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Jonathan Herskovitz
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Heidi Elsaesser
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
- Princess Margaret Cancer Center, Immune Therapy Program, University Health Network, Toronto, Ontario
| | - Laura M. Snell
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
- Princess Margaret Cancer Center, Immune Therapy Program, University Health Network, Toronto, Ontario
| | - Elizabeth B. Wilson
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Juan Carlos de la Torre
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California, United States of America
| | - Scott G. Kitchen
- Division of Hematology and Oncology, Department of Medicine, UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Marcus A. Horwitz
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Steven J. Bensinger
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Stephen T. Smale
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
| | - David G. Brooks
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
- Princess Margaret Cancer Center, Immune Therapy Program, University Health Network, Toronto, Ontario
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
- * E-mail:
| |
Collapse
|
8
|
Menner AJ, Rauch KS, Aichele P, Pircher H, Schachtrup C, Schachtrup K. Id3 Controls Cell Death of 2B4+ Virus-Specific CD8+ T Cells in Chronic Viral Infection. THE JOURNAL OF IMMUNOLOGY 2015; 195:2103-14. [PMID: 26232435 DOI: 10.4049/jimmunol.1402607] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 07/07/2015] [Indexed: 01/22/2023]
Abstract
Sustained Ag persistence in chronic infection results in a deregulated CD8(+) T cell response that is characterized by T cell exhaustion and cell death of Ag-specific CD8(+) T cells. Yet, the underlying transcriptional mechanisms regulating CD8(+) T cell exhaustion and cell death are poorly defined. Using the experimental mouse model of lymphocytic choriomeningitis virus infection, we demonstrate that the transcriptional regulator Id3 controls cell death of virus-specific CD8(+) T cells in chronic infection. By comparing acute and chronic infection, we showed that Id3 (-) virus-specific CD8(+) T cells were less abundant, whereas the absolute numbers of Id3 (+) virus-specific CD8(+) T cells were equal in chronic and acute infection. Phenotypically, Id3 (-) and Id3 (+) cells most prominently differed with regard to expression of the surface receptor 2B4; although Id3 (-) cells were 2B4(+), almost all Id3 (+) cells lacked expression of 2B4. Lineage-tracing experiments showed that cells initially expressing Id3 differentiated into Id3 (-)2B4(+) cells; in turn, these cells were terminally differentiated and highly susceptible to cell death under conditions of persisting Ag. Enforced Id3 expression specifically increased the persistence of 2B4(+) virus-specific CD8(+) T cells by decreasing susceptibility to Fas/Fas ligand-mediated cell death. Thus, our findings reveal that the transcriptional regulator Id3 promotes the survival of virus-specific CD8(+) T cells in chronic infection and suggest that targeting Id3 might be beneficial for preventing cell death of CD8(+) T cells in chronic infection or for promoting cell death of uncontrolled, hyperactive CD8(+) T cells to prevent immunopathology.
Collapse
Affiliation(s)
- Alexandra J Menner
- Center for Chronic Immunodeficiency, University Medical Center and University of Freiburg, 79106 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79106 Freiburg, Germany
| | - Katharina S Rauch
- Center for Chronic Immunodeficiency, University Medical Center and University of Freiburg, 79106 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79106 Freiburg, Germany
| | - Peter Aichele
- Center for Microbiology and Hygiene, Institute for Immunology, University Medical Center and University of Freiburg, 79104 Freiburg, Germany; and
| | - Hanspeter Pircher
- Center for Microbiology and Hygiene, Institute for Immunology, University Medical Center and University of Freiburg, 79104 Freiburg, Germany; and
| | - Christian Schachtrup
- Department of Molecular Embryology, Institute of Anatomy and Cell Biology, University of Freiburg, 79104 Freiburg, Germany
| | - Kristina Schachtrup
- Center for Chronic Immunodeficiency, University Medical Center and University of Freiburg, 79106 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79106 Freiburg, Germany;
| |
Collapse
|