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Abberger H, Groom JR. Macro-clusters: CD301b+ DCs prime Th2 responses. J Exp Med 2024; 221:e20240088. [PMID: 38442269 PMCID: PMC10911086 DOI: 10.1084/jem.20240088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024] Open
Abstract
In this issue of JEM, Lyons-Cohen et al. (https://doi.org/10.1084/jem.20231282) reveal that lymph node macro-clusters provide a spatial niche where CD301b+ cDC2s and CD4+ T cells interact. These integrin-mediated cellular hubs promote enhanced co-stimulation and cytokine signaling to drive Th2 differentiation.
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Affiliation(s)
- Hanna Abberger
- Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Joanna R. Groom
- Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Australia
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2
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Abberger H, Hose M, Ninnemann A, Menne C, Eilbrecht M, Lang KS, Matuschewski K, Geffers R, Herz J, Buer J, Westendorf AM, Hansen W. Neuropilin-1 identifies a subset of highly activated CD8+ T cells during parasitic and viral infections. PLoS Pathog 2023; 19:e1011837. [PMID: 38019895 PMCID: PMC10718454 DOI: 10.1371/journal.ppat.1011837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/13/2023] [Accepted: 11/17/2023] [Indexed: 12/01/2023] Open
Abstract
Neuropilin-1 (Nrp-1) expression on CD8+ T cells has been identified in tumor-infiltrating lymphocytes and in persistent murine gamma-herpes virus infections, where it interferes with the development of long-lived memory T cell responses. In parasitic and acute viral infections, the role of Nrp-1 expression on CD8+ T cells remains unclear. Here, we demonstrate a strong induction of Nrp-1 expression on CD8+ T cells in Plasmodium berghei ANKA (PbA)-infected mice that correlated with neurological deficits of experimental cerebral malaria (ECM). Likewise, the frequency of Nrp-1+CD8+ T cells was significantly elevated and correlated with liver damage in the acute phase of lymphocytic choriomeningitis virus (LCMV) infection. Transcriptomic and flow cytometric analyses revealed a highly activated phenotype of Nrp-1+CD8+ T cells from infected mice. Correspondingly, in vitro experiments showed rapid induction of Nrp-1 expression on CD8+ T cells after stimulation in conjunction with increased expression of activation-associated molecules. Strikingly, T cell-specific Nrp-1 ablation resulted in reduced numbers of activated T cells in the brain of PbA-infected mice as well as in spleen and liver of LCMV-infected mice and alleviated the severity of ECM and LCMV-induced liver pathology. Mechanistically, we identified reduced blood-brain barrier leakage associated with reduced parasite sequestration in the brain of PbA-infected mice with T cell-specific Nrp-1 deficiency. In conclusion, Nrp-1 expression on CD8+ T cells represents a very early activation marker that exacerbates deleterious CD8+ T cell responses during both, parasitic PbA and acute LCMV infections.
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Affiliation(s)
- Hanna Abberger
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Germany
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Matthias Hose
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Germany
| | - Anne Ninnemann
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Germany
| | - Christopher Menne
- Institute of Virology, University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Germany
- Murdoch Children’s Research Institute, Parkville, Victoria, Australia
| | - Mareike Eilbrecht
- Institute of Immunology, University Hospital Essen, University Duisburg-Essen, Germany
| | - Karl S. Lang
- Institute of Immunology, University Hospital Essen, University Duisburg-Essen, Germany
| | - Kai Matuschewski
- Department of Molecular Parasitology, Institute of Biology, Humboldt University Berlin, Germany
| | - Robert Geffers
- Genome Analytics, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Josephine Herz
- Department of Pediatrics 1, Neonatology & Experimental perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Germany
- Centre for Translational Neuro- and Behavioral Sciences, C-TNBS, Faculty of Medicine, University Duisburg-Essen, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Germany
| | - Astrid M. Westendorf
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Germany
| | - Wiebke Hansen
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Germany
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Günther A, Hose M, Abberger H, Schumacher F, Veith Y, Kleuser B, Matuschewski K, Lang KS, Gulbins E, Buer J, Westendorf A, Hansen W. The acid ceramidase/ceramide axis controls parasitemia in Plasmodium yoelii-infected mice by regulating erythropoiesis. eLife 2022; 11:77975. [PMID: 36094170 PMCID: PMC9499531 DOI: 10.7554/elife.77975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 09/09/2022] [Indexed: 11/13/2022] Open
Abstract
Acid ceramidase (Ac) is part of the sphingolipid metabolism and responsible for the degradation of ceramide. As bioactive molecule, ceramide is involved in the regulation of many cellular processes. However, the impact of cell-intrinsic Ac activity and ceramide on the course of Plasmodium infection remains elusive. Here, we use Ac-deficient mice with ubiquitously increased ceramide levels to elucidate the role of endogenous Ac activity in a murine malaria model. Interestingly, ablation of Ac leads to alleviated parasitemia associated with decreased T cell responses in the early phase of Plasmodium yoelii infection. Mechanistically, we identified dysregulated erythropoiesis with reduced numbers of reticulocytes, the preferred host cells of P. yoelii, in Ac-deficient mice. Furthermore, we demonstrate that administration of the Ac inhibitor carmofur to wildtype mice has similar effects on P. yoelii infection and erythropoiesis. Notably, therapeutic carmofur treatment after manifestation of P. yoelii infection is efficient in reducing parasitemia. Hence, our results provide evidence for the involvement of Ac and ceramide in controlling P. yoelii infection by regulating red blood cell development.
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Affiliation(s)
- Anne Günther
- Institute of Medical Microbiology, University of Duisburg-Essen, Essen, Germany
| | - Matthias Hose
- Institute of Medical Microbiology, University of Duisburg-Essen, Essen, Germany
| | - Hanna Abberger
- Institute of Medical Microbiology, University of Duisburg-Essen, Essen, Germany
| | | | - Ylva Veith
- Institute of Biology, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Burkhard Kleuser
- Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
| | - Kai Matuschewski
- Institute of Biology, Humboldt-Universität zu Berlin, Berlin, Germany
| | | | - Erich Gulbins
- Institute of Molecular Biology, University of Duisburg-Essen, Essen, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University of Duisburg-Essen, Essen, Germany
| | - Astrid Westendorf
- Institute of Medical Microbiology, University of Duisburg-Essen, Duisburg, Germany
| | - Wiebke Hansen
- Institute of Medical Microbiology, University of Duisburg-Essen, Essen, Germany
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Beckmann L, Obst S, Labusek N, Abberger H, Köster C, Klein-Hitpass L, Schumann S, Kleinschnitz C, Hermann DM, Felderhoff-Müser U, Bendix I, Hansen W, Herz J. Regulatory T Cells Contribute to Sexual Dimorphism in Neonatal Hypoxic-Ischemic Brain Injury. Stroke 2022; 53:381-390. [PMID: 34983246 PMCID: PMC8785522 DOI: 10.1161/strokeaha.121.037537] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Supplemental Digital Content is available in the text. Background and Purpose: Neonatal encephalopathy caused by hypoxia-ischemia (HI) is a major cause of death and disability in newborns. Clinical and experimental studies suggest a sexual dimorphism in HI-induced brain injury and therapy responses. A major hallmark of HI pathophysiology is the infiltration of peripheral immune cells into the injured brain. However, the specific role of regulatory T cells (Tregs) in neonatal HI is still unknown. Methods: Nine-day-old mice were exposed to HI by ligation of the right common carotid artery followed by 1 hour hypoxia (10% oxygen). Using immunohistochemistry, flow cytometry, and microarray analyses, Tregs were investigated in the brain, spleen, and blood 24 hours post HI. The functional role of Tregs was evaluated by acute Treg depletion in depletion of regulatory T cells transgenic mice. Brain injury, neuroinflammatory responses, and vascular injury were analyzed via immunohistochemistry and Western blot 48 hours and 7 days after HI. Functional outcome was assessed 3 days and 5 weeks after HI. Results: Female mice revealed an increased cerebral Treg infiltration, coinciding with elevated chemokine receptor expression. Treg depletion in females aggravated HI-induced brain tissue injury, short-term motor deficits, and long-term deficits in exploratory activity, paralleled by an increased microglia and endothelial activation and leukocyte infiltration. Treg depletion in male mice reduced HI-induced brain injury, short-term motor, and long-term cognitive deficits, associated with reduced vascular injury. Ex vivo isolated female Tregs displayed an increased immunosuppressive activity on effector T cell proliferation and an increased gene enrichment in pathways related to enhanced Treg activity. Conclusions: Tregs from neonatal female mice provide endogenous neuroprotection, whereas Tregs from male mice increase secondary neurodegeneration. As potential mechanisms, we identified intrinsic transcriptional differences associated with enhanced anti-inflammatory activity of female Tregs. Our study emphasizes the urgent need for sex-stratified clinical and preclinical analyses.
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Affiliation(s)
- Lucia Beckmann
- Department of Pediatrics I, Neonatology & Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, U.F.-M., I.B., J.H.).,Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.)
| | - Stefanie Obst
- Department of Pediatrics I, Neonatology & Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, U.F.-M., I.B., J.H.).,Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.)
| | - Nicole Labusek
- Department of Pediatrics I, Neonatology & Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, U.F.-M., I.B., J.H.).,Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.)
| | - Hanna Abberger
- Institute of Medical Microbiology, Molecular Infection Immunology, University Hospital Essen, University Duisburg-Essen, Germany. (H.A., W.H.)
| | - Christian Köster
- Department of Pediatrics I, Neonatology & Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, U.F.-M., I.B., J.H.).,Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.)
| | - Ludger Klein-Hitpass
- Institute of Cell Biology, Genomic and Transcriptomic Facility (GTF), University Hospital Essen, University Duisburg-Essen, Germany. (L.K.-H.)
| | - Sven Schumann
- Institute for Microscopic Anatomy and Neurobiology, University Medical Center, Johannes Gutenberg-University, Mainz, Germany (S.S.)
| | - Christoph Kleinschnitz
- Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.).,Department of Neurology, University Hospital Essen, University Duisburg-Essen, Germany. (C. Kleinschnitz, D.M.H.)
| | - Dirk M Hermann
- Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.).,Department of Neurology, University Hospital Essen, University Duisburg-Essen, Germany. (C. Kleinschnitz, D.M.H.)
| | - Ursula Felderhoff-Müser
- Department of Pediatrics I, Neonatology & Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, U.F.-M., I.B., J.H.).,Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.)
| | - Ivo Bendix
- Department of Pediatrics I, Neonatology & Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, U.F.-M., I.B., J.H.).,Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.)
| | - Wiebke Hansen
- Institute of Medical Microbiology, Molecular Infection Immunology, University Hospital Essen, University Duisburg-Essen, Germany. (H.A., W.H.)
| | - Josephine Herz
- Department of Pediatrics I, Neonatology & Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, U.F.-M., I.B., J.H.).,Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University Duisburg-Essen, Germany. (L.B., S.O., N.L., C. Köster, C. Kleinschnitz, D.M.H., U.F.-M., I.B., J.H.)
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Wilk C, Effenberg L, Abberger H, Steenpass L, Hansen W, Zeschnigk M, Kirschning C, Buer J, Kehrmann J. CRISPR/Cas9-mediated demethylation of FOXP3-TSDR toward Treg-characteristic programming of Jurkat T cells. Cell Immunol 2022; 371:104471. [PMID: 34954490 DOI: 10.1016/j.cellimm.2021.104471] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 12/03/2021] [Accepted: 12/07/2021] [Indexed: 12/26/2022]
Abstract
Demethylation of FOXP3-TSDR (Treg specific demethylated region) is a hallmark of stable differentiation and suppressive function of regulatory T (Treg) cells. Previous protocols aiming at human naïve T cell differentiation failed to implement a Treg cell specific epigenetic signature. Ten-eleven translocation (TET) enzymes catalyze DNA demethylation. Plasmids towardexpression of a fusion protein encompassing nonfunctional Cas9, the catalytic domain of TET1, blue fluorescent protein, and encoding single guide RNAs (sgRNAs) targeting specific segments of the FOXP3-TSDR were engineered and transfected into Jurkat T cells. FOXP3-TSDR methylation was analyzed by deep-amplicon bisulfite sequencing while cellular Foxp3, Tbet, Gata3, and Rorgt mRNA levels were determined by real-time PCR. Overexpression of dCas9TET1 significantly decreased Jurkat cell FOXP3-TSDR methylation and increased Foxp3 mRNA expression while expressions of master transcription factor mRNAs of other major T cell lineages remained largely unaffected. dCas9-TET1 construct transfection mediated Treg programming of patients' primary T cells might be feasible.
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Affiliation(s)
- Camilla Wilk
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Germany
| | - Laura Effenberg
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Germany
| | - Hanna Abberger
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Germany
| | - Laura Steenpass
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, Germany; Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany
| | - Wiebke Hansen
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Germany
| | - Michael Zeschnigk
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, Germany
| | - Carsten Kirschning
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Germany
| | - Jan Kehrmann
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Germany.
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Abberger H, Barthel R, Bahr J, Thiel J, Luppus S, Buer J, Westendorf AM, Hansen W. Neuropilin-1 Is Expressed on Highly Activated CD4 + Effector T Cells and Dysfunctional CD4 + Conventional T Cells from Naive Mice. J Immunol 2021; 207:1288-1297. [PMID: 34341169 DOI: 10.4049/jimmunol.2100222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 07/02/2021] [Indexed: 11/19/2022]
Abstract
Neuropilin-1 (Nrp-1) is a well described marker molecule for CD4+Foxp3+ thymus-derived regulatory T cells (Tregs). In addition, a small population of CD4+Foxp3- conventional (conv) T cells expresses Nrp-1 in naive mice, and Nrp-1 expression has been described to be upregulated on activated CD4+ T cells. However, the function of Nrp-1 expression on CD4+ non-Tregs still remains elusive. In this study, we demonstrate that Nrp-1 expression was induced upon stimulation of CD4+Foxp3- T cells in vitro and during an ongoing immune response in vivo. This activation-induced Nrp-1+CD4+ T cell subset (iNrp-1+) showed a highly activated phenotype in terms of elevated CD25 and CD44 expression, enhanced production of proinflammatory cytokines, and increased proliferation compared with the Nrp-1-CD4+ counterpart. In contrast, Nrp-1+CD4+Foxp3- conv T cells from naive mice (nNrp-1+) were dysfunctional. nNrp-1+CD4+ conv T cells upregulated activation-associated molecules to a lesser extent, exhibited impaired proliferation and produced fewer proinflammatory cytokines than Nrp-1-CD4+ conv T cells upon stimulation in vitro. Moreover, the expression of PD-1 and CTLA-4 was significantly higher on nNrp-1+CD4+Foxp3- T cells compared with iNrp-1+CD4+Foxp3- T cells and Nrp-1-CD4+Foxp3- T cells after stimulation and under homeostatic conditions. Strikingly, transfer of Ag-specific iNrp-1+CD4+ conv T cells aggravated diabetes development, whereas Ag-specific nNrp-1+CD4+ conv T cells failed to induce disease in a T cell transfer model of diabetes. Overall, our results indicate that Nrp-1 expression has opposite functions in recently activated CD4+ non-Tregs compared with CD4+ non-Tregs from naive mice.
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Affiliation(s)
- Hanna Abberger
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Romy Barthel
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Jasmin Bahr
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Jacqueline Thiel
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Sina Luppus
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Astrid M Westendorf
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Wiebke Hansen
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
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Hose M, Günther A, Abberger H, Begum S, Korencak M, Becker KA, Buer J, Westendorf AM, Hansen W. T Cell-Specific Overexpression of Acid Sphingomyelinase Results in Elevated T Cell Activation and Reduced Parasitemia During Plasmodium yoelii Infection. Front Immunol 2019; 10:1225. [PMID: 31214184 PMCID: PMC6554418 DOI: 10.3389/fimmu.2019.01225] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 05/14/2019] [Indexed: 12/31/2022] Open
Abstract
The enzyme acid sphingomyelinase (ASM) hydrolyzes sphingomyelin to ceramide and is thereby involved in several cellular processes such as differentiation, proliferation, and apoptosis in different cell types. However, the function of ASM in T cells is still not well characterized. Here, we used T cell-specific ASM overexpressing mice (t-ASM/CD4cre) to clarify the impact of cell-intrinsic ASM activity on T cell function in vitro and in vivo. We showed that t-ASM/CD4cre mice exhibit decreased frequencies of Foxp3+ T regulatory cells (Tregs) within the spleen. Enforced T cell-specific ASM expression resulted in less efficient induction of Tregs and promoted differentiation of CD4+CD25− naïve T cells into IFN-γ producing Th1 cells in vitro. Further analysis revealed that ASM-overexpressing T cells from t-ASM/CD4cre mice show elevated T cell receptor (TCR) signaling activity accompanied with increased proliferation upon stimulation in vitro. Plasmodium yoelii infection of t-ASM/CD4cre mice resulted in enhanced T cell activation and was associated with reduced parasitemia in comparison to infected control mice. Hence, our results provide evidence that ASM activity modulates T cell function in vitro and in vivo.
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Affiliation(s)
- Matthias Hose
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Anne Günther
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Hanna Abberger
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Salina Begum
- Institute of Molecular Biology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Marek Korencak
- Institute for HIV Research, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Katrin A Becker
- Institute of Molecular Biology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Astrid M Westendorf
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Wiebke Hansen
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
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Herz J, Köster C, Crasmöller M, Abberger H, Hansen W, Felderhoff-Müser U, Bendix I. Peripheral T Cell Depletion by FTY720 Exacerbates Hypoxic-Ischemic Brain Injury in Neonatal Mice. Front Immunol 2018; 9:1696. [PMID: 30127782 PMCID: PMC6087766 DOI: 10.3389/fimmu.2018.01696] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/10/2018] [Indexed: 11/13/2022] Open
Abstract
Hypoxic-ischemic injury to the developing brain remains a major cause of significant long-term morbidity and mortality. Emerging evidence from neonatal brain injury models suggests a detrimental role for peripheral lymphocytes. The immunomodulatory substance FTY720, a sphingosine-1-phosphate receptor agonist, was shown to reduce adult ischemia-induced neurodegeneration through its lymphopenic mode of action. In the present study, we hypothesized that FTY720 promotes neuroprotection by reducing peripheral lymphocytes and their infiltration into the injured neonatal brain. Term-born equivalent postnatal day 9 C57BL/6 mice were exposed to hypoxia ischemia (HI) followed by a single injection of 1 mg/kg FTY720 or vehicle (0.9% sodium chloride). Brain injury, microglia, and endothelial activation were assessed 7 days post HI using histology and western blot. Peripheral and cerebral leukocyte subsets were analyzed by multichannel flow cytometry. Whether FTY720s’ effects could be attributed to its lymphopenic mode of action was determined in T cell-depleted mice. In contrast to our hypothesis, FTY720 exacerbated HI-induced neuropathology including loss of gray and white matter structures. While microglia and endothelial activation remained unchanged, FTY720 induced a strong and sustained depletion of peripheral T cells resulting in significantly reduced cerebral infiltration of CD4 T cells. CD4 T cell subset analysis revealed that circulating regulatory and effector T cells counts were similarly decreased after FTY720 treatment. However, since neonatal HI per se induces a selective infiltration of Foxp3 positive regulatory T cells compared to Foxp3 negative effector T cells effects of FTY720 on cerebral regulatory T cell infiltration were more pronounced than on effector T cells. Reductions in T lymphocytes, and particularly regulatory T cells coincided with an increased infiltration of innate immune cells, mainly neutrophils and inflammatory macrophages. Importantly anti-CD3-mediated T cell depletion resulted in a similar exacerbation of brain injury, which was not further enhanced by an additional FTY720 treatment. In summary, peripheral T cell depletion by FTY720 resulted in increased infiltration of innate immune cells concomitant to reduced T cell infiltration and exacerbation HI-induced brain injury. This study indicates that neonatal T cells may promote endogenous neuroprotection in the term-born equivalent hypoxic-ischemic brain potentially providing new opportunities for therapeutic intervention.
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Affiliation(s)
- Josephine Herz
- Department of Pediatrics 1, Neonatology and Experimental Perinatal Neuroscience, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Christian Köster
- Department of Pediatrics 1, Neonatology and Experimental Perinatal Neuroscience, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Marius Crasmöller
- Department of Pediatrics 1, Neonatology and Experimental Perinatal Neuroscience, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Hanna Abberger
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Wiebke Hansen
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Ursula Felderhoff-Müser
- Department of Pediatrics 1, Neonatology and Experimental Perinatal Neuroscience, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Ivo Bendix
- Department of Pediatrics 1, Neonatology and Experimental Perinatal Neuroscience, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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Ueffing K, Abberger H, Westendorf AM, Matuschewski K, Buer J, Hansen W. Conventional CD11c high Dendritic Cells Are Important for T Cell Priming during the Initial Phase of Plasmodium yoelii Infection, but Are Dispensable at Later Time Points. Front Immunol 2017; 8:1333. [PMID: 29085373 PMCID: PMC5650681 DOI: 10.3389/fimmu.2017.01333] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 10/02/2017] [Indexed: 12/20/2022] Open
Abstract
Dendritic cells (DCs) are highly specialized antigen-presenting cells that orchestrate adaptive immune responses to pathogens. During malaria infection pro- and anti-inflammatory T cell responses have to be tightly balanced to ensure parasite clearance without induction of severe immune pathologies. However, the precise role of CD11chigh DCs in this process is still discussed controversially. Here, we demonstrate that long-term depletion of conventional CD11chigh DCs in Plasmodium yoelii (P. yoelii)-infected diphtheria toxin (DT)-treated RosaiDTR/CD11c-cre mice interferes with the activation of CD8+ and CD4+ T cells as well as CD4+Foxp3+ regulatory T cells at early time points during infection. Moreover, systemic levels of the pro-inflammatory cytokines IFN-γ and TNF-α were decreased in P. yoelii-infected mice deficient for CD11chigh DCs compared to infected RosaiDTR controls. To further elucidate the importance of CD11chigh DCs during the later phase of infection, we treated RosaiDTR/CD11c-cre and control mice with DT only from day 4 of P. yoelii infection onward. Strikingly, this approach had no impact on the activation and IFN-γ production of CD4+ and CD8+ effector T cells. These results indicate that CD11chigh DCs play a crucial role in eliciting effector T cell responses during the initial phase, but are dispensable during ongoing infection with P. yoelii.
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Affiliation(s)
- Kristina Ueffing
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Hanna Abberger
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Astrid M Westendorf
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Kai Matuschewski
- Molecular Parasitology, Institute of Biology, Humboldt University of Berlin, Berlin, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Wiebke Hansen
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
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Reinboth BS, Köster C, Abberger H, Prager S, Bendix I, Felderhoff-Müser U, Herz J. Endogenous hypothermic response to hypoxia reduces brain injury: Implications for modeling hypoxic-ischemic encephalopathy and therapeutic hypothermia in neonatal mice. Exp Neurol 2016; 283:264-75. [DOI: 10.1016/j.expneurol.2016.06.024] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 06/15/2016] [Accepted: 06/22/2016] [Indexed: 01/16/2023]
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Zacher J, Burger K, Färber L, Gräve M, Abberger H, Bertsch K. Topisches Diclofenac Emulgel versus orales Ibuprofen in der Therapie der aktivierten Arthrose der Fingergelenke (Heberden- und/oder Bouchard-Arthrose) - Doppelblinde, kontrollierte, randomisierte Studie -. AKTUEL RHEUMATOL 2001. [DOI: 10.1055/s-2001-11369] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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