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Gladow N, Hollmann C, Weirather J, Ding X, Burkard M, Uehlein S, Bharti R, Förstner K, Kerkau T, Beyersdorf N, Frantz S, Ramos G, Hofmann U. Role of CD4 + T-cells for regulating splenic myelopoiesis and monocyte differentiation after experimental myocardial infarction. Basic Res Cardiol 2024; 119:261-275. [PMID: 38436707 PMCID: PMC11008073 DOI: 10.1007/s00395-024-01035-3] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/10/2024] [Accepted: 01/27/2024] [Indexed: 03/05/2024]
Abstract
Myocardial infarction (MI) induces the generation of proinflammatory Ly6Chigh monocytes in the spleen and the recruitment of these cells to the myocardium. CD4+ Foxp3+ CD25+ T-cells (Tregs) promote the healing process after myocardial infarction by engendering a pro-healing differentiation state in myocardial monocyte-derived macrophages. We aimed to study the effects of CD4+ T-cells on splenic myelopoiesis and monocyte differentiation. We instigated MI in mice and found that MI-induced splenic myelopoiesis is abrogated in CD4+ T-cell deficient animals. Conventional CD4+ T-cells promoted myelopoiesis in vitro by cell-cell-contact and paracrine mechanisms, including interferon-gamma (IFN-γ) signalling. Depletion of regulatory T-cells enhanced myelopoiesis in vivo, as evidenced by increases in progenitor cell numbers and proliferative activity in the spleen 5 days after MI. The frequency of CD4+ T-cells-producing factors that promote myelopoiesis increased within the spleen of Treg-depleted mice. Moreover, depletion of Tregs caused a proinflammatory bias in splenic Ly6Chigh monocytes, which showed predominantly upregulated expression of IFN-γ responsive genes after MI. Our results indicate that conventional CD4+ T-cells promote and Tregs attenuate splenic myelopoiesis and proinflammatory differentiation of monocytes.
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Affiliation(s)
- Nadine Gladow
- Department of Internal Medicine I, University Clinic Würzburg, Würzburg, Germany.
- Comprehensive Heart Failure Centre, University Clinic Würzburg, Würzburg, Germany.
| | - Claudia Hollmann
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | | | - Xin Ding
- Department of Internal Medicine I, University Clinic Würzburg, Würzburg, Germany
- Comprehensive Heart Failure Centre, University Clinic Würzburg, Würzburg, Germany
| | - Matthias Burkard
- Department of Internal Medicine I, University Clinic Würzburg, Würzburg, Germany
| | - Sabrina Uehlein
- Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
| | - Richa Bharti
- TUM Campus, Straubing for Biotechnology and Sustainability, Weihenstephan-Triesdorf University of Applied Sciences, Straubing, Germany
| | - Konrad Förstner
- ZB MED-Information Centre for Life Sciences, Cologne, Germany
- Faculty of Information Science and Communication Studies, Cologne University of Applied Sciences, Cologne, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Stefan Frantz
- Department of Internal Medicine I, University Clinic Würzburg, Würzburg, Germany
- Comprehensive Heart Failure Centre, University Clinic Würzburg, Würzburg, Germany
| | - Gustavo Ramos
- Department of Internal Medicine I, University Clinic Würzburg, Würzburg, Germany
- Comprehensive Heart Failure Centre, University Clinic Würzburg, Würzburg, Germany
| | - Ulrich Hofmann
- Department of Internal Medicine I, University Clinic Würzburg, Würzburg, Germany
- Comprehensive Heart Failure Centre, University Clinic Würzburg, Würzburg, Germany
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Morbach C, Beyersdorf N, Moser N, Pelin D, Afshar B, Ramos G, Kerkau T, Kaiser E, Lamers J, Pätkau J, Sahiti F, Albert J, Güder G, Ertl G, Angermann CE, Frantz S, Hofmann U, Jahns R, Jahns V, Störk S. Prevalence of anti-beta-1 antibody 6 months after hospitalization for acute heart failure predicts adverse outcome. ESC Heart Fail 2023; 10:3227-3231. [PMID: 37688355 PMCID: PMC10567622 DOI: 10.1002/ehf2.14509] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 07/13/2023] [Accepted: 08/10/2023] [Indexed: 09/10/2023] Open
Abstract
AIMS Agonistic antibodies against neurohumoral receptors can induce cardio-noxious effects by altering the baseline receptor activity. To estimate the prevalence of autoantibodies directed against the beta-1 receptor (b1-AAB) in patients admitted to the hospital for acute heart failure (HF) at (i) baseline and (ii) after 6 months of follow-up (F6) and (iii) after another 12 months of follow-up (i.e. 18 months after index hospitalization), to estimate their prognostic impact on clinical outcome (death or first hospitalization for HF). METHODS AND RESULTS In 47 patients, b1-AAB were serially determined in serum samples collected at index hospitalization and at 6 months of follow-up (F6) with a flow cytometry-based assay: median age 71 years (quartiles 60, 80), 23 (49%) women, 24 (51%) HF with preserved ejection fraction. Beta1-AAB were detected in three subjects at index hospitalization (6%), and in eight subjects at F6 (17%). There were no differences apparent between patients with and without b1-AAB at F6 with regard to age, sex, type, duration, or main cause of HF. During the 12 month period following F6 (i.e. up to month 18), eight events occurred. Event-free survival was associated with prevalence of b1-AAB at F6. Compared with patients without b1-AAB at F6, age-adjusted Cox regression indicated a higher event risk in patients harbouring b1-AAB, with a hazard ratio of 8.96 (95% confidence interval 1.81-44.50, P = 0.007). CONCLUSIONS Our results suggest a possible adverse prognostic relevance of b1-AAB in patients with acute HF, but this observation needs to be confirmed in larger patient collectives.
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Affiliation(s)
- Caroline Morbach
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Niklas Beyersdorf
- Institute for Virology and ImmunobiologyUniversity WürzburgWürzburgGermany
| | - Nicola Moser
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Dora Pelin
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Boshra Afshar
- Institute for Virology and ImmunobiologyUniversity WürzburgWürzburgGermany
| | - Gustavo Ramos
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Thomas Kerkau
- Institute for Virology and ImmunobiologyUniversity WürzburgWürzburgGermany
| | - Elisa Kaiser
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Janna Lamers
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Jannika Pätkau
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Floran Sahiti
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Judith Albert
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Gülmisal Güder
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Georg Ertl
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
| | - Christiane E. Angermann
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
| | - Stefan Frantz
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Ulrich Hofmann
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
| | - Roland Jahns
- Interdisciplinary Bank of biological materials and Data Würzburg (ibdw)University Hospital WürzburgWürzburgGermany
| | - Valerie Jahns
- Institute for Pharmacology and ToxicologyUniversity WürzburgWürzburgGermany
| | - Stefan Störk
- Comprehensive Heart Failure Center, Department for Clinical Research and EpidemiologyUniversity and University Hospital WürzburgAm Schwarzenberg 15WürzburgGermany
- Department of Medicine IUniversity Hospital WürzburgWürzburgGermany
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Uehlein S, Ding X, Flößer J, Schmidt S, Steitz J, Bille M, Schnitter F, Baltes S, Saalmüller A, Gerner W, Herrmann T, Frey A, Kerkau T, Hofmann U, Beyersdorf N. Human-like Response of Pig T Cells to Superagonistic Anti-CD28 Monoclonal Antibodies. J Immunol 2021; 207:2473-2488. [PMID: 34625520 DOI: 10.4049/jimmunol.2100174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 09/13/2021] [Indexed: 01/07/2023]
Abstract
Because of its size, anatomical similarities, and now also accessibility to genetic manipulations, pigs are used as animal models for human diseases and immune system development. However, expression and function of CD28, the most important costimulatory receptor expressed by T cells, so far is poorly understood in this species. Using a newly generated mAb (mAb 3D11) with specificity for pig CD28, we detected CD28 on CD8+ and CD4+ αβ T cells. Among γδ T cells, CD28 expression was restricted to a small CD2+ subpopulation of phenotypically naive cells. Functionally, CD28 ligation with mAb 3D11-costimulated porcine T cells, enhanced proliferation and cytokine secretion in vitro. We used a second, likewise newly generated but superagonistic, anti-CD28 mAb (CD28-SA; mAb 4D12) to test the function of CD28 on porcine T cells in a pilot study in vivo. Injection of the CD28-SA into pigs in vivo showed a very similar dose-response relationship as in humans (i.e., 100 µg/kg body weight [BW]) of CD28-SA induced a cytokine release syndrome that was avoided at a dose of 10 µg/kg BW and below. The data further suggest that low-dose (10 µg/kg BW) CD28-SA infusion was sufficient to increase the proportion of Foxp3+ regulatory T cells among CD4+ T cells in vivo. The pig is thus a suitable animal model for testing novel immunotherapeutics. Moreover, data from our pilot study in pigs further suggest that low-dose CD28-SA infusion might allow for selective expansion of CD4+ regulatory T cells in humans.
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Affiliation(s)
- Sabrina Uehlein
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Xin Ding
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Janina Flößer
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Selma Schmidt
- Department of Pathobiology, Institute of Immunology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Julia Steitz
- Faculty of Medicine, Institute for Laboratory Animal Science, RWTH Aachen University, Aachen, Germany
| | - Maya Bille
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany; and
| | - Florian Schnitter
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany; and.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Steffen Baltes
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany; and
| | - Armin Saalmüller
- Department of Pathobiology, Institute of Immunology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Wilhelm Gerner
- Department of Pathobiology, Institute of Immunology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Thomas Herrmann
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Anna Frey
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany; and.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Ulrich Hofmann
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany; and.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany;
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Morbach C, Beyersdorf N, Kerkau T, Ramos G, Sahiti F, Albert J, Jahns R, Ertl G, Angermann CE, Frantz S, Hofmann U, Störk S. Adaptive anti-myocardial immune response following hospitalization for acute heart failure. ESC Heart Fail 2021; 8:3348-3353. [PMID: 33934554 PMCID: PMC8318503 DOI: 10.1002/ehf2.13376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 12/23/2020] [Revised: 03/07/2021] [Accepted: 04/08/2021] [Indexed: 11/25/2022] Open
Abstract
Aims It has been hypothesized that cardiac decompensation accompanying acute heart failure (AHF) episodes generates a pro‐inflammatory environment boosting an adaptive immune response against myocardial antigens, thus contributing to progression of heart failure (HF) and poor prognosis. We assessed the prevalence of anti‐myocardial autoantibodies (AMyA) as biomarkers reflecting adaptive immune responses in patients admitted to the hospital for AHF, followed the change in AMyA titres for 6 months after discharge, and evaluated their prognostic utility. Methods and results AMyA were determined in n = 47 patients, median age 71 (quartiles 60; 80) years, 23 (49%) female, and 24 (51%) with HF with preserved ejection fraction, from blood collected at baseline (time point of hospitalization) and at 6 month follow‐up (visit F6). Patients were followed for 18 months (visit F18). The prevalence of AMyA increased from baseline (n = 21, 45%) to F6 (n = 36, 77%; P < 0.001). At F6, the prevalence of AMyA was higher in patients with HF with preserved ejection fraction (n = 21, 88%) compared with patients with reduced ejection fraction (n = 14, 61%; P = 0.036). During the subsequent 12 months after F6, that is up to F18, patients with newly developed AMyA at F6 had a higher risk for the combined endpoint of death or rehospitalization for HF (hazard ratio 4.79, 95% confidence interval 1.13–20.21; P = 0.033) compared with patients with persistent or without AMyA at F6. Conclusions Our results support the hypothesis that AHF may induce patterns of adaptive immune responses. More studies in larger populations and well‐defined patient subgroups are needed to further clarify the role of the adaptive immune system in HF progression.
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Affiliation(s)
- Caroline Morbach
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Gustavo Ramos
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Floran Sahiti
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Judith Albert
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Roland Jahns
- Interdisciplinary Bank of Biomaterials and Data Würzburg (ibdw), University Hospital Würzburg, Würzburg, Germany
| | - Georg Ertl
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany
| | - Christiane E Angermann
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany
| | - Stefan Frantz
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Ulrich Hofmann
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Stefan Störk
- Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, D-97078, Germany.,Department of Medicine I, University Hospital Würzburg, Würzburg, Germany
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Gladow N, Hollmann C, Ramos G, Frantz S, Kerkau T, Beyersdorf N, Hofmann U. Treatment of mice with a ligand binding blocking anti-CD28 monoclonal antibody improves healing after myocardial infarction. PLoS One 2020; 15:e0227734. [PMID: 32298302 PMCID: PMC7161974 DOI: 10.1371/journal.pone.0227734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 12/29/2019] [Indexed: 01/07/2023] Open
Abstract
Both conventional and regulatory CD4+ T-cells rely on costimulatory signals mediated by cell surface receptors including CD28 for full activation. We showed previously that stimulation of CD4+ Foxp3+ regulatory T-cells by superagonistic anti-CD28 monoclonal antibodies (mAb) improves myocardial healing after experimental myocardial infarction (MI). However, the effect of ligand binding blocking anti-CD28 monoclonal antibodies has not yet been tested in this context. We hypothesize that ligand blocking anti-CD28 mAb treatment might favorably impact on healing after MI by limiting the activation of conventional CD4+ T-cells. Therefore, we studied the therapeutic effect of the recently characterized mAb E18 which blocks ligand binding to CD28 in a mouse permanent coronary ligation model. E18 or an irrelevant control mAb was applied once on day two after myocardial infarction to wildtype mice. Echocardiography was performed on day 7 after MI. E18 treatment improved the survival and reduced the incidence of left ventricular ruptures after experimental myocardial infarction. Accordingly, although we found no difference in infarct size, there was significantly less left ventricular dilation after E18 treatment in surviving animals as determined by echocardiography at day 7 after MI. In sham operated control mice neither antibody had an impact on body weight, survival, and echocardiographic parameters. Mechanistically, compared to control immunoglobulin, E18 treatment reduced the number of CD4+ T-cells and monocytes/macrophages within the infarct and periinfarct zone on day 5. This was accompanied by an upregulation of arginase which is a marker for alternatively differentiated macrophages. The data indicate that CD28-dependent costimulation of CD4+ T-cells impairs myocardial healing and anti-CD28 antibody treatment constitutes a potentially clinically translatable approach to improve the outcome early after MI.
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Affiliation(s)
- Nadine Gladow
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany
- * E-mail:
| | - Claudia Hollmann
- Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Gustavo Ramos
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany
- Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Stefan Frantz
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany
- Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Ulrich Hofmann
- Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany
- Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
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Boivin-Jahns V, Uhland K, Holthoff HP, Beyersdorf N, Kocoski V, Kerkau T, Münch G, Lohse MJ, Ungerer M, Jahns R. Cyclopeptide COR-1 to treat beta1-adrenergic receptor antibody-induced heart failure. PLoS One 2018; 13:e0201160. [PMID: 30125285 PMCID: PMC6101361 DOI: 10.1371/journal.pone.0201160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 07/10/2018] [Indexed: 01/05/2023] Open
Abstract
RATIONALE Despite advances in pharmacotherapy, heart failure still incurs significant morbidity and mortality. Stimulating antibodies directed against the secondextracellular loop of the human ß1-adrenergic receptor (anti-ß1EC2) cause myocyte damage and heart failure in rats. This receptor domain is 100% homologous between rats and humans. OBJECTIVE ß1EC2-mimicking cyclopeptides (25-meric) markedly improved the development and/or course of anti-ß1EC2-mediated cardiomyopathy. Further developments should be investigated. METHODS AND RESULTS The shortened 18-meric cyclic peptide COR-1, in which one of the two disulphide bonds was removed to enable reproducible GMP production, can also be used to treat cardiomyopathic rats. Echocardiography, catheterization and histopathology of the rat hearts revealed that monthly intravenous administrations of COR-1 almost fully reversed the cardiomyopathic phenotype within 6 months at doses of 1 to 4 mg/kg body weight. Administration of COR-1 resulted in markedly reduced anti-ß1EC2-expressing memory B lymphocytes in the spleen despite continued antigenic boosts, but did not significantly decrease overall peripheral anti-ß1EC2 titers. COR-1 did not induce any anti-ß1EC2 or other immune response in naïve rats (corresponding to findings in healthy human volunteers). It did not cause any toxic side effects in GLP studies in dogs, rats or mice, and the "no observed adverse effect level" (NOAEL) exceeded the therapeutic doses by 100-fold. CONCLUSION The second generation immunomodulating epitope-mimicking cyclopeptide COR-1 (also termed JNJ-5442840) offers promise to treat immune-mediated cardiac diseases.
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MESH Headings
- Amino Acid Sequence
- Animals
- Antibodies, Monoclonal/administration & dosage
- Antibody Specificity
- Disease Models, Animal
- Female
- Guinea Pigs
- Heart Failure/drug therapy
- Heart Failure/etiology
- Heart Failure/physiopathology
- Humans
- Male
- Molecular Mimicry/immunology
- Myocardium/metabolism
- Peptide Fragments/chemistry
- Peptide Fragments/therapeutic use
- Peptides, Cyclic/chemistry
- Peptides, Cyclic/therapeutic use
- Peptides, Cyclic/toxicity
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Rats
- Rats, Inbred Lew
- Rats, Wistar
- Receptors, Adrenergic, beta-1/chemistry
- Receptors, Adrenergic, beta-1/genetics
- Receptors, Adrenergic, beta-1/immunology
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Affiliation(s)
- Valérie Boivin-Jahns
- Department of Pharmacology and Toxicology, University of Würzburg, Comprehensive Heart Failure Centre (CHFC), University Hospital Würzburg, Würzburg, Germany
| | | | | | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Vladimir Kocoski
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | | | - Martin J. Lohse
- Department of Pharmacology and Toxicology, University of Würzburg, Comprehensive Heart Failure Centre (CHFC), University Hospital Würzburg, Würzburg, Germany
| | | | - Roland Jahns
- Department of Pharmacology and Toxicology, University of Würzburg, Comprehensive Heart Failure Centre (CHFC), University Hospital Würzburg, Würzburg, Germany
- Interdisciplinary Bank of Biomaterials and Data Würzburg, Comprehensive Heart Failure Centre (CHFC), Würzburg, Germany
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7
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Ickrath P, Kleinsasser N, Ding X, Ginzkey C, Beyersdorf N, Hagen R, Kerkau T, Hackenberg S. Accumulation of CD69+ tissue‑resident memory T cells in the nasal polyps of patients with chronic rhinosinusitis. Int J Mol Med 2018; 42:1116-1124. [PMID: 29749428 DOI: 10.3892/ijmm.2018.3653] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 04/16/2018] [Indexed: 11/06/2022] Open
Abstract
In patients with chronic rhinosinusitis with nasal polyps (CRSwNP), a relative accumulation of cluster of differentiation (CD)8+ T cells over CD4+ T cells occurs in nasal polyps compared with the peripheral blood. Nasal CD8+ T cells and CD4+ T cells predominantly present an effector memory phenotype. Immunological studies have reported that memory T cells recirculate from the tissues to the peripheral blood and a high percentage of these T cells persist within the tissue. The aim of the present study was to characterize CD69+ sphingosine‑1‑phosphate receptor 1 (S1PR1)‑ tissue resident memory T cells (Trm) in the polyps of patients with CRSwNP. Tissue and blood samples were collected from 10 patients undergoing nasal sinus surgery. Expression of specific extra‑ and intracellular molecules were analyzed using multicolor flow cytometry. A significantly higher level of CD8+ T cells than CD4+ T cells was present in nasal polyps, while significantly more CD4+ T cells than CD8+ T cells were detected in the peripheral blood of patients with CRSwNP. The frequency of CD69+ T cells was significantly higher in CD8+ and CD4+ T cells in nasal polyps compared with the peripheral blood. The frequency of CD69+ S1PR1‑ Trm was also significantly higher in CD4+ and CD8+ T cells from nasal polyps compared with the peripheral blood. Within polyps, the frequency of CD69+ S1PR1‑ Trm was again significantly higher in CD8+ compared with CD4+ T cells. In summary, a significantly higher frequency of CD69+ S1PR1‑ T cells was observed in the nasal polyps compared with the peripheral blood in patients with CRSwNP. The results of the present study suggest that local regulation of the immune response occurs within nasal polyps. As such, Trm should be considered a potential stimulus in the pathogenesis of nasal polyps. However, the role of Trm in nasal polyps as a pathogenic trigger of the local inflammatory reaction requires further investigation.
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Affiliation(s)
- Pascal Ickrath
- Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, D‑97080 Wuerzburg, Germany
| | - Norbert Kleinsasser
- Department of Otorhinolaryngology, Head and Neck Surgery, Kepler University Hospital, A‑4021 Linz, Austria
| | - Xin Ding
- Institute for Virology and Immunobiology, University of Wuerzburg, D‑97080 Wuerzburg, Germany
| | - Christian Ginzkey
- Department of Otorhinolaryngology, Head and Neck Surgery 'Otto Körner', University Medical Center Rostock, D‑18057 Rostock, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Wuerzburg, D‑97080 Wuerzburg, Germany
| | - Rudolf Hagen
- Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, D‑97080 Wuerzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Wuerzburg, D‑97080 Wuerzburg, Germany
| | - Stephan Hackenberg
- Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, D‑97080 Wuerzburg, Germany
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8
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Gotru SK, Gil-Pulido J, Beyersdorf N, Diefenbach A, Becker IC, Vögtle T, Remer K, Chubanov V, Gudermann T, Hermanns HM, Nieswandt B, Kerkau T, Zernecke A, Braun A. Cutting Edge: Imbalanced Cation Homeostasis in MAGT1-Deficient B Cells Dysregulates B Cell Development and Signaling in Mice. J Immunol 2018; 200:2529-2534. [PMID: 29581357 DOI: 10.4049/jimmunol.1701467] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 02/27/2018] [Indexed: 11/19/2022]
Abstract
Cation homeostasis, in relation to various immune-suppressive diseases, is a novel field of investigation. Recently, patients with a loss-of-function mutation in magnesium transporter 1 (MAGT1) were reported to present a dysregulated Mg2+ homeostasis in T lymphocytes. Using Magt1-knockout mice (Magt1-/y ), we show that Mg2+ homeostasis was impaired in Magt1-/y B cells and Ca2+ influx was increased after BCR stimulation, whereas T and NK cell function was unaffected. Consequently, mutant B cells displayed an increased phosphorylation of BCR-related proteins differentially affecting protein kinase C activation. These in vitro findings translated into increased frequencies of CD19+ B cells and marginal zone B cells and decreased frequencies of plasma cells among CD45+ splenocytes in vivo. Altogether, our study demonstrates for the first time, to our knowledge, that abolished MAGT1 function causes imbalanced cation homeostasis and developmental responses in B cells. Therefore, this study might contribute to a further understanding of B cell-related pathologies.
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Affiliation(s)
- Sanjeev Kiran Gotru
- Institute of Experimental Biomedicine, University Hospital Würzburg, 97080 Würzburg, Germany.,Rudolf Virchow Centre, University of Würzburg, 97080 Würzburg, Germany
| | - Jesus Gil-Pulido
- Institute of Experimental Biomedicine, University Hospital Würzburg, 97080 Würzburg, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, 97078 Würzburg, Germany
| | - Andreas Diefenbach
- Institute of Microbiology and Infection Immunology, Charité - University Medicine Berlin, 12203 Berlin, Germany
| | - Isabelle C Becker
- Institute of Experimental Biomedicine, University Hospital Würzburg, 97080 Würzburg, Germany.,Rudolf Virchow Centre, University of Würzburg, 97080 Würzburg, Germany
| | - Timo Vögtle
- Institute of Experimental Biomedicine, University Hospital Würzburg, 97080 Würzburg, Germany.,Rudolf Virchow Centre, University of Würzburg, 97080 Würzburg, Germany
| | - Katharina Remer
- Institute of Experimental Biomedicine, University Hospital Würzburg, 97080 Würzburg, Germany.,Rudolf Virchow Centre, University of Würzburg, 97080 Würzburg, Germany
| | - Vladimir Chubanov
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilian University of Munich, 80539 Munich, Germany; and
| | - Thomas Gudermann
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilian University of Munich, 80539 Munich, Germany; and
| | - Heike M Hermanns
- Department of Hepatology, University Hospital of Würzburg, 97080 Würzburg, Germany
| | - Bernhard Nieswandt
- Institute of Experimental Biomedicine, University Hospital Würzburg, 97080 Würzburg, Germany.,Rudolf Virchow Centre, University of Würzburg, 97080 Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, 97078 Würzburg, Germany
| | - Alma Zernecke
- Institute of Experimental Biomedicine, University Hospital Würzburg, 97080 Würzburg, Germany
| | - Attila Braun
- Institute of Experimental Biomedicine, University Hospital Würzburg, 97080 Würzburg, Germany; .,Rudolf Virchow Centre, University of Würzburg, 97080 Würzburg, Germany
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9
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Ickrath P, Kleinsasser N, Ding X, Ginzkey C, Beyersdorf N, Kerkau T, Hagen R, Hackenberg S. Impact and Modulations of Peripheral and Edaphic B Cell Subpopulations in Chronic Rhinosinusitis With Nasal Polyposis. Clin Exp Otorhinolaryngol 2018; 11:133-140. [PMID: 29409312 PMCID: PMC5951070 DOI: 10.21053/ceo.2017.01389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 10/15/2017] [Revised: 12/18/2017] [Accepted: 12/20/2017] [Indexed: 11/22/2022] Open
Abstract
Objectives The pathophysiological mechanisms of chronic rhinosinusitis with nasal polyposis (CRSwNP) still are discussed controversially. Regulatory B cells (Breg) are responsible for the suppression of T cell activity: deficiencies for Breg have been demonstrated to contribute to autoimmune disorders, e.g., systemic lupus erythematosus. In order to evaluate the influence of B cell subpopulations, especially Breg, on the etiology of this disease, the aim of this study was to characterize subpopulations of peripheral and edaphic B cells in CRSwNP. Methods Polypoid tissue and blood samples were collected from 10 patients undergoing paranasal sinus surgery and lymphocytes were analyzed by multicolor flow cytometry. Results There was a significantly lower frequency of B cells in nasal polyps compared to peripheral blood mononuclear cells (PBMC) in patients with CRSwNP. Mature resting B cells were the main population within B cells in PBMC, and memory B cells in nasal polyps. Remarkably, Breg and mature B cells significantly decreased in nasal polyps compared to PBMC. Memory B cells significantly increased and represented the main subpopulation in nasal polyps in patients with CRSwNP. Conclusion In this study a detailed contemporary characterization of B cell subpopulations in patients with CRSwNP is presented. The influence of edaphic B cells could play a key role in the maintenance of this chronic infectious disease.
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Affiliation(s)
- Pascal Ickrath
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Wuerzburg, Germany
| | - Norbert Kleinsasser
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Wuerzburg, Germany
| | - Xin Ding
- Institute for Virology and Immunobiology, University of Wuerzburg, Wuerzburg, Germany
| | - Christian Ginzkey
- Department of Oto-Rhino-Laryngology, Head and Neck Surgery "Otto Körner", University Medical Center Rostock, Rostock, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Wuerzburg, Wuerzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Wuerzburg, Wuerzburg, Germany
| | - Rudolf Hagen
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Wuerzburg, Germany
| | - Stephan Hackenberg
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Wuerzburg, Germany
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10
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Ickrath P, Kleinsasser N, Ding X, Ginzkey C, Beyersdorf N, Hagen R, Kerkau T, Hackenberg S. Characterization of T-cell subpopulations in patients with chronic rhinosinusitis with nasal polyposis. Allergy Rhinol (Providence) 2017; 8:139-147. [PMID: 29070271 PMCID: PMC5662539 DOI: 10.2500/ar.2017.8.0214] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background: There is an ongoing discussion concerning the potential origins of chronic rhinosinusitis with nasal polyposis (CRSwNP). Objective: The aim of this study was to quantify subpopulations of T cells in peripheral blood and nasal polyps in CRSwNP to examine their influence on the etiology of this disease. Methods: Tissue and blood samples were collected from 11 patients who underwent nasal sinus surgery, and these samples were analyzed by multicolor flow cytometry. Results: There was a significantly lower frequency of CD4+ T-helper (Th) cells and a significantly higher frequency of CD8+ T cells among lymphocytes isolated from nasal polyps compared with peripheral blood mononuclear cells (PBMC). In both T-cell subpopulations, a shift mainly from naive T cells among peripheral blood lymphocytes toward an effector memory and terminally differentiated subtype predominance in nasal polyps was observed. Among CD4+ T cells, the frequencies of cluster of differentiation (CD) 45RA- Forkhead-Box-Protein P3high (FoxP3high) cytotoxic T-lymphocyte-associated Protein 4high (CTLA-4high) activated regulatory T (Treg) cells, and CD45RA- Forkhead-Box-Protein P3low (FoxP3low) memory T cells were significantly increased in nasal polyps compared with PBMC. Conclusion: In this study, we presented a detailed characterization of CD4+ and CD8+ T-cell subpopulations in patients with CRSwNP. CD8+ T cells were more prominent in nasal polyps than in CD4+ T cells. Both nasal CD8+ T cells and CD4+ T cells predominantly had an effector memory phenotype. Among CD4+ T cells, activated Treg cells were increased in nasal polyps compared with PBMC. The data point toward a local regulation of T-cell composition within the microenvironment of nasal polyps, which might be further exploited in the future to develop novel immunotherapeutic strategies.
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Affiliation(s)
- Pascal Ickrath
- From the Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Würzburg, Germany
| | - Norbert Kleinsasser
- From the Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Würzburg, Germany
| | - Xin Ding
- Institute for Virology and Immunobiology, University of Wuerzburg, Würzburg, Germany
| | - Christian Ginzkey
- Department of Oto-Rhino-Laryngology, Head and Neck Surgery "Otto Körner," University Medical Center Rostock, Rostock, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Wuerzburg, Würzburg, Germany
| | - Rudolf Hagen
- From the Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Wuerzburg, Würzburg, Germany
| | - Stephan Hackenberg
- From the Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Würzburg, Germany
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11
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Uri A, Werner S, Lühder F, Hünig T, Kerkau T, Beyersdorf N. Protection of Mice from Acute Graft-versus-Host Disease Requires CD28 Co-stimulation on Donor CD4 + Foxp3 + Regulatory T Cells. Front Immunol 2017; 8:721. [PMID: 28690612 PMCID: PMC5481316 DOI: 10.3389/fimmu.2017.00721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 02/23/2017] [Accepted: 06/06/2017] [Indexed: 12/20/2022] Open
Abstract
Acute graft-versus-host disease (aGvHD) is a major cause of morbidity and mortality after allogeneic hematopoietic stem cell plus T cell transplantation (allo-HSCT). In this study, we investigated the requirement for CD28 co-stimulation of donor CD4+ conventional (CD4+CD25-Foxp3-, Tconv) and regulatory (CD4+CD25+Foxp3+, Treg) T cells in aGvHD using tamoxifen-inducible CD28 knockout (iCD28KO) or wild-type (wt) littermates as donors of CD4+ Tconv and Treg. In the highly inflammatory C57BL/6 into BALB/c allo-HSCT transplantation model, CD28 depletion on donor CD4+ Tconv reduced clinical signs of aGvHD, but did not significantly prolong survival of the recipient mice. Selective depletion of CD28 on donor Treg did not abrogate protection of recipient mice from aGvHD until about day 20 after allo-HSCT. Later, however, the pool of CD28-depleted Treg drastically declined as compared to wt Treg. Consequently, only wt, but not CD28-deficient, Treg were able to continuously suppress aGvHD and induce long-term survival of the recipient mice. To our knowledge, this is the first study that specifically evaluates the impact of CD28 expression on donor Treg in aGvHD. Moreover, the delayed kinetics of aGvHD lethality after transplantation of iCD28KO Treg provides a novel animal model for similar disease courses found in patients after allo-HSCT.
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Affiliation(s)
- Anna Uri
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Sandra Werner
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Fred Lühder
- Institute for Multiple Sclerosis Research and Neuroimmunology, University Medical Centre Göttingen, Göttingen, Germany
| | - Thomas Hünig
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
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12
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Berges C, Kerkau T, Werner S, Wolf N, Winter N, Hünig T, Einsele H, Topp MS, Beyersdorf N. Hsp90 inhibition ameliorates CD4 + T cell-mediated acute Graft versus Host disease in mice. Immun Inflamm Dis 2016; 4:463-473. [PMID: 27980780 PMCID: PMC5134726 DOI: 10.1002/iid3.127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 08/18/2016] [Accepted: 08/21/2016] [Indexed: 11/22/2022]
Abstract
Introduction For many patients with leukemia only allogeneic bone marrow transplantion provides a chance of cure. Co‐transplanted mature donor T cells mediate the desired Graft versus Tumor (GvT) effect required to destroy residual leukemic cells. The donor T cells very often, however, also attack healthy tissue of the patient inducing acute Graft versus Host Disease (aGvHD)—a potentially life‐threatening complication. Methods Therefore, we used the well established C57BL/6 into BALB/c mouse aGvHD model to evaluate whether pharmacological inhibition of heat shock protein 90 (Hsp90) would protect the mice from aGvHD. Results Treatment of the BALB/c recipient mice from day 0 to +2 after allogeneic CD4+ T cell transplantation with the Hsp90 inhibitor 17‐(dimethylaminoethylamino)‐17‐demethoxygeldanamycin (DMAG) partially protected the mice from aGvHD. DMAG treatment was, however, insufficient to prolong overall survival of leukemia‐bearing mice after transplantation of allogeneic CD4+ and CD8+ T cells. Ex vivo analyses and in vitro experiments revealed that DMAG primarily inhibits conventional CD4+ T cells with a relative resistance of CD4+ regulatory and CD8+ T cells toward Hsp90 inhibition. Conclusions Our data, thus, suggest that Hsp90 inhibition might constitute a novel approach to reduce aGvHD in patients without abrogating the desired GvT effect.
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Affiliation(s)
- Carsten Berges
- Department of Internal Medicine II Division of Hematology University Hospital Würzburg Würzburg Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology University of Würzburg Würzburg Germany
| | - Sandra Werner
- Institute for Virology and Immunobiology University of Würzburg Würzburg Germany
| | - Nelli Wolf
- Institute for Virology and Immunobiology University of Würzburg Würzburg Germany
| | - Nadine Winter
- Department of Internal Medicine II Division of Hematology University Hospital Würzburg Würzburg Germany
| | - Thomas Hünig
- Institute for Virology and Immunobiology University of Würzburg Würzburg Germany
| | - Hermann Einsele
- Department of Internal Medicine II Division of Hematology University Hospital Würzburg Würzburg Germany
| | - Max S Topp
- Department of Internal Medicine II Division of Hematology University Hospital Würzburg Würzburg Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology University of Würzburg Würzburg Germany
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13
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Abstract
T-cells play a key role within the adaptive immune system mediating cellular immunity and orchestrating the immune response as a whole. Their activation requires not only recognition of antigen/major histocompatibility complexes by the T-cell receptor but in addition co-stimulation via the CD28 molecule through binding to CD80, CD86, or as recently discovered, inducible co-stimulator ligand expressed by antigen-presenting cells. Apart from tight control of the co-stimulatory signal by the T-cell receptor complex, expression of the inhibitory receptor cytotoxic T-lymphocyte antigen-4 (CTLA-4) sharing its ligands with CD28 is required to avoid inappropriate or prolonged T-cell activation. CD4(+) Foxp3(+) regulatory T (Treg) cells, which are crucial inhibitors of autoimmunity, add another level of complexity in that they differ from conventional non-regulatory CD4(+) T-cells by strongly depending on CD28 signaling for their generation and homeostasis. Moreover, CTLA-4 is constitutively expressed by Treg cells where it serves as a key mediator of suppression, while conventional CD4(+) T-cells express CTLA-4 only after activation. Here, we discuss recent insights into the molecular events underlying CD28-mediated co-stimulation, its impact on gene regulation, and the differential role of CD28 expression on Treg cells versus conventional CD4(+) and CD8(+) T-cells. Moreover, we summarize the exciting therapeutic options which have arisen from our current understanding of T-cell co-stimulation. Some of these have already been translated into the clinic, while others are expected to follow soon due to promising preclinical results. In particular, we discuss the failed 2006 trial of the CD28 superagonist TGN1412, and the return of this potent T-cell activator to clinical development.
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Affiliation(s)
- Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Thomas Hünig
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
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14
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Beyersdorf N, Werner S, Wolf N, Hünig T, Kerkau T. In vitro polyclonal activation of conventional T cells with a CD28 superagonist protects mice from acute graft versus host disease. Eur J Immunol 2015; 45:1997-2007. [DOI: 10.1002/eji.201445317] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 02/27/2015] [Accepted: 04/21/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Niklas Beyersdorf
- Institute for Virology and Immunobiology; University of Würzburg; Würzburg Germany
| | - Sandra Werner
- Institute for Virology and Immunobiology; University of Würzburg; Würzburg Germany
| | - Nelli Wolf
- Institute for Virology and Immunobiology; University of Würzburg; Würzburg Germany
| | - Thomas Hünig
- Institute for Virology and Immunobiology; University of Würzburg; Würzburg Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology; University of Würzburg; Würzburg Germany
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15
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Schuhmann MK, Kraft P, Stoll G, Lorenz K, Meuth SG, Wiendl H, Nieswandt B, Sparwasser T, Beyersdorf N, Kerkau T, Kleinschnitz C. CD28 superagonist-mediated boost of regulatory T cells increases thrombo-inflammation and ischemic neurodegeneration during the acute phase of experimental stroke. J Cereb Blood Flow Metab 2015; 35:6-10. [PMID: 25315859 PMCID: PMC4294400 DOI: 10.1038/jcbfm.2014.175] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/09/2014] [Accepted: 09/22/2014] [Indexed: 01/16/2023]
Abstract
While the detrimental role of non-regulatory T cells in ischemic stroke is meanwhile unequivocally recognized, there are controversies about the properties of regulatory T cells (Treg). The aim of this study was to elucidate the role of Treg by applying superagonistic anti-CD28 antibody expansion of Treg. Stroke outcome, thrombus formation, and brain-infiltrating cells were determined on day 1 after transient middle cerebral artery occlusion. Antibody-mediated expansion of Treg enhanced stroke size and worsened functional outcome. Mechanistically, Treg increased thrombus formation in the cerebral microvasculature. These findings confirm that Treg promote thrombo-inflammatory lesion growth during the acute stage of ischemic stroke.
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Affiliation(s)
| | - Peter Kraft
- 1] Department of Neurology, University Clinics Würzburg, Würzburg, Germany [2] Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center, University of Würzburg, Würzburg, Germany
| | - Guido Stoll
- Department of Neurology, University Clinics Würzburg, Würzburg, Germany
| | - Kristina Lorenz
- Institute of Pharmacology and Toxicology, University of Würzburg, Würzburg, Germany
| | - Sven G Meuth
- 1] Department of Neurology, University of Münster, Münster, Germany [2] Institute of Physiology I-Neuropathophysiology, University of Münster, Münster, Germany
| | - Heinz Wiendl
- Department of Neurology, University of Münster, Münster, Germany
| | - Bernhard Nieswandt
- University Hospital and Rudolf Virchow Center, University of Würzburg, Würzburg, Germany
| | - Tim Sparwasser
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research; a joint venture between the Medical School Hannover and the Helmholtz Centre for Infection Research, Hannover, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Thomas Kerkau
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
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16
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Weirather J, Hofmann UDW, Beyersdorf N, Ramos GC, Vogel B, Frey A, Ertl G, Kerkau T, Frantz S. Foxp3+ CD4+ T cells improve healing after myocardial infarction by modulating monocyte/macrophage differentiation. Circ Res 2014; 115:55-67. [PMID: 24786398 DOI: 10.1161/circresaha.115.303895] [Citation(s) in RCA: 541] [Impact Index Per Article: 54.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE An exaggerated or persistent inflammatory activation after myocardial infarction (MI) leads to maladaptive healing and subsequent remodeling of the left ventricle. Foxp3(+) CD4(+) regulatory T cells (Treg cells) contribute to inflammation resolution. Therefore, Treg cells might influence cardiac healing post-MI. OBJECTIVE Our aim was to study the functional role of Treg cells in wound healing post-MI in a mouse model of permanent left coronary artery ligation. METHODS AND RESULTS Using a model of genetic Treg-cell ablation (Foxp3(DTR) mice), we depleted the Treg-cell compartment before MI induction, resulting in aggravated cardiac inflammation and deteriorated clinical outcome. Mechanistically, Treg-cell depletion was associated with M1-like macrophage polarization, characterized by decreased expression of inflammation-resolving and healing-promoting factors. The phenotype of exacerbated cardiac inflammation and outcome in Treg-cell-ablated mice could be confirmed in a mouse model of anti-CD25 monoclonal antibody-mediated depletion. In contrast, therapeutic Treg-cell activation by superagonistic anti-CD28 monoclonal antibody administration 2 days after MI led to improved healing and survival. Compared with control animals, CD28-SA-treated mice showed increased collagen de novo expression within the scar, correlating with decreased rates of left ventricular ruptures. Therapeutic Treg-cell activation induced an M2-like macrophage differentiation within the healing myocardium, associated with myofibroblast activation and increased expression of monocyte/macrophage-derived proteins fostering wound healing. CONCLUSIONS Our data indicate that Treg cells beneficially influence wound healing after MI by modulating monocyte/macrophage differentiation. Moreover, therapeutic activation of Treg cells constitutes a novel approach to improve healing post-MI.
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Affiliation(s)
- Johannes Weirather
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany
| | - Ulrich D W Hofmann
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany.
| | - Niklas Beyersdorf
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany
| | - Gustavo C Ramos
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany
| | - Benjamin Vogel
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany
| | - Anna Frey
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany
| | - Georg Ertl
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany
| | - Thomas Kerkau
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany
| | - Stefan Frantz
- From the Department of Internal Medicine I, University Hospital Wuerzburg, Wuerzburg, Germany (J.W., U.H., G.C.R., B.V, A.F., G.E., S.F.); and Department of Immunobiology (N.B., T.K.), and Comprehensive Heart Failure Center (J.W., U.H., G.C.R., B.V., A.F., G.E., S.F.), University of Wuerzburg, Wuerzburg, Germany
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17
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Frantz S, Weirather J, Vogel B, Beyersdorf N, Kerkau T, Hofmann U. Abstract 211: Regulatory T cells improve healing after myocardial infarction. Circ Res 2013. [DOI: 10.1161/res.113.suppl_1.a211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
The proinflammatory activation of innate immunity by myocardial ischemic injury has been recognized for long time. Our recent data have indicated that activation of CD4+ T cells, presumably by auto-antigen recognition, is a prerequisite for formation of a stable scar and prevention from left ventricular dilation after experimental myocardial infarction in mice. We here hypothesized that regulatory CD4+CD25+Foxp3+CD4+ T cells might improve left ventricular wound healing and prevent from adverse remodeling after myocardial infarction.
Results:
Experimental myocardial infarction in mice induced the proliferation and activation of CD4+CD25+Foxp3+ regulatory T cells, as demonstrated by intracellular expression of the Ikaros family transcription factor Helios, in heart draining lymph nodes. Pretreatment of mice with an anti-CD25 antibody before myocardial infarction efficiently depleted CD4+CD25+Foxp3+ regulatory T cells and increased mortality after myocardial infarction as compared to mice treated with an isotype-matched control antibody of irrelevant specificity, i.e., 25% survival in anti-CD25 treated mice vs. 55,9% survival in control antibody treated animals. Therapeutic activation of regulatory CD4+CD25+Foxp3+ T cells by a superagonistic anti-CD28 antibody (CD28-SA) applied at day 2 after myocardial infarction prevented, compared to mice treated with an isotype-matched control antibody, from left ventricular rupture and resulted in improved survival (47.1% survival in the control group vs. 76.6% survival in the CD28-SA treated group). CD28-SA treatment lead to expansion of CD4+CD25+Foxp3+ T-cells in the peripheral blood and increased their frequency in the infarcted myocardium. This was associated with increased expression of several molecules known to facilitate wound healing by promoting the formation of a stable scar such as osteopontin and coagulation factor XIII.
Conclusion:
CD4+CD25+Foxp3+ regulatory T-cells are a prerequisite for proper myocardial wound healing and can be therapeutically activated to improve outcome after experimental myocardial infarction.
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Affiliation(s)
- Stefan Frantz
- Medizinische Klinik und Poliklinik I, Wuerzburg, Germany
| | | | - Benjamin Vogel
- Medizinische Klinik und Poliklinik I, Wuerzburg, Germany
| | | | - Thomas Kerkau
- Institute for Virology and Immunobiology, Wuerzburg, Germany
| | - Ulrich Hofmann
- Medizinische Klinik und Poliklinik I, Wuerzburg, Germany
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18
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Hofmann U, Mathes D, Weirather J, Beyersdorf N, Kerkau T, Frantz S. Abstract 212: Cd4+ T-cell Activation By T-cell Receptor Engagement Contributes To Myocardial Ischemia-reperfusion Injury. Circ Res 2013. [DOI: 10.1161/res.113.suppl_1.a212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
We have recently shown that CD4
+
but not CD8
+
T-cells contribute to ischemia-reperfusion injury of the myocardium. We therefore hypothesized that CD4
+
T-cells become activated by autoantigen recognition via their T-cell receptor during reperfusion.
Methods and Results:
Infarct size as percent of the area-at-risk was determined by combined Evans` blue and triphenyltetrazolium (TTC) staining after 30 minutes of in vivo ischemia followed by 24 hours reperfusion in mice. After 24 hours of reperfusion there was a significantly increased population of CD4
+
T-cells which expressed the surface protein CD40L in comparison to sham operated mice [n≥7; p<0.05; WT 10.8 ± 0.2% vs. sham 6.4 ± 0.5%]. CD40L is typically expressed in T-cells activated by T-cell receptor engagement. OT-II mice carry a transgenic T-cell receptor with specificity for an ovalbumin-derived peptide. These mice have a limited T-cell receptor repertoire, dominated by specificity for the irrelevant antigen ovalbumin. After 30 minutes of ischemia and 24 hours of reperfusion OT-II mice showed significantly reduction in infarct size [n≥4; p= 0.02; infarct/area at risk: OTII mice 38.9 ± 2.4% vs. WT mice 63.7 ± 6.6 % ]. Administration of a CD40L blocking antibody to wildtype mice also reduced infarct size when compared to administration of isotype-matched antibodies [n≥6; p = 0.03; infarct/ area at risk: anti-CD154 treatment 60.4 ± 3.4% vs. control 75.3 ± 4.1%]. CD4
+
CD25
+
Foxp3
+
T-cells (natural T-regulatory cells) have a low activation threshold and constitute a T-cell subset with reactivity against autoantigens. Depletion of these cells by diphtheria-toxin application in a mouse model expressing the diphtheria-toxin receptor under the Foxp3 promotor also resulted in a significant reduction of infarct size when compared to diphtheria-toxin treated wildtype mice [n≥4; p=0.03; infarct/ area at risk: T
reg
-depleted DEREG mice 51.9± 3% vs. WT littermates 72.3± 2%].
Conclusion:
Our results indicate that CD4
+
T-cells that have been activated by an MHC class II/ T-cell receptor dependent mechanism, presumably by autoantigen recognition, contribute to myocardial ischemia-reperfusion injury.
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Affiliation(s)
- Ulrich Hofmann
- Medizinische Klinik und Poliklinik I, Wuerzburg, Germany
| | - Denise Mathes
- Medizinische Klinik und Poliklinik I, Wuerzburg, Germany
| | | | | | - Thomas Kerkau
- Institute for Virology and Immunobiology, Wuerzburg, Germany
| | - Stefan Frantz
- Medizinische Klinik und Poliklinik I, Wuerzburg, Germany
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19
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Hofmann U, Beyersdorf N, Weirather J, Podolskaya A, Bauersachs J, Ertl G, Kerkau T, Frantz S. Activation of CD4+ T lymphocytes improves wound healing and survival after experimental myocardial infarction in mice. Circulation 2012; 125:1652-63. [PMID: 22388323 DOI: 10.1161/circulationaha.111.044164] [Citation(s) in RCA: 347] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND The role of adaptive immunity, especially CD4(+) T-helper cells, has not yet been systematically investigated in wound healing and remodeling after myocardial infarction (MI). Therefore, we studied whether CD4(+) T cells become activated and influence wound healing after experimental MI in mice. METHODS AND RESULTS When we compared sham versus MI in wild-type (WT) mice, T-cell receptor-dependent activation of both conventional Foxp3(-) and regulatory Foxp3(+) CD4(+) T cells could be demonstrated in heart-draining lymph nodes within the first week after MI. Concomitantly, we found infiltration of CD4(+) T cells in infarcted myocardium. To study the role of CD4(+) T cells in wound healing and remodeling, CD4(+) T-cell-deficient mice (CD4 knockout [KO], MHCII(Δ/Δ)) and T-cell receptor-transgenic OT-II mice recognizing an irrelevant ovalbumin-derived peptide were studied. Serial echocardiography up to day 56 after MI revealed increased left ventricular dilation in CD4 KO compared with WT mice. Within the infarcted myocardium, CD4 KO mice displayed higher total numbers of leukocytes and proinflammatory monocytes (18.3±3.0 10(4)/mg WT versus 75.7±17.0 10(4)/mg CD4 KO, P<0.05). MHCII(Δ/Δ) and OT-II mice displayed significantly greater mortality (21% WT versus 48% OT-II, P<0.05, and WT 22% versus 52% MHCII(Δ/Δ), P<0.05) and myocardial rupture rates than WT mice. Collagen matrix formation in the infarct zone was severely disturbed in CD4 KO and MHCII(Δ/Δ) mice, as well as in OT-II mice. CONCLUSIONS The present study provides the first evidence that CD4(+) T cells become activated after MI, presumably driven by recognition of cardiac autoantigens, and facilitate wound healing of the myocardium.
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Affiliation(s)
- Ulrich Hofmann
- University of Wuerzburg, University Clinic, Comprehensive Heart Failure Center, Department of Internal Medicine I, Oberdürrbacherstraße 6, Würzburg, Germany.
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20
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Beyersdorf N, Werner S, Wolf N, Herrmann T, Kerkau T. Characterization of a new mouse model for peripheral T cell lymphoma in humans. PLoS One 2011; 6:e28546. [PMID: 22163033 PMCID: PMC3230627 DOI: 10.1371/journal.pone.0028546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 11/10/2011] [Indexed: 02/04/2023] Open
Abstract
Peripheral T cell lymphomas (PTCLs) are associated with a poor prognosis due to often advanced disease at the time of diagnosis and due to a lack of efficient therapeutic options. Therefore, appropriate animal models of PTCL are vital to improve clinical management of this disease. Here, we describe a monoclonal CD8+ CD4− αβ T cell receptor Vβ2+ CD28+ T cell lymphoma line, termed T8-28. T8-28 cells were isolated from an un-manipulated adult BALB/c mouse housed under standard pathogen-free conditions. T8-28 cells induced terminal malignancy upon adoptive transfer into syngeneic BALB/c mice. Despite intracellular expression of the cytotoxic T cell differentiation marker granzyme B, T8-28 cells appeared to be defective with respect to cytotoxic activity as read-out in vitro. Among the protocols tested, only addition of interleukin 2 in vitro could partially compensate for the in vivo micro-milieu in promoting growth of the T8-28 lymphoma cells.
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MESH Headings
- Animals
- Antibodies, Monoclonal/chemistry
- CD28 Antigens/biosynthesis
- CD4-Positive T-Lymphocytes/cytology
- CD8-Positive T-Lymphocytes/cytology
- Cell Line, Tumor
- Cell Separation
- Cells, Cultured
- Cytokines/metabolism
- Disease Models, Animal
- Flow Cytometry
- Granzymes/pharmacology
- Humans
- Lymphoma, T-Cell, Peripheral/genetics
- Lymphoma, T-Cell, Peripheral/pathology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Receptors, Antigen, T-Cell/metabolism
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
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Affiliation(s)
- Niklas Beyersdorf
- University of Würzburg, Institute for Virology and Immunobiology, Würzburg, Germany.
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21
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Morbach H, Dannecker H, Kerkau T, Girschick HJ. Prevalence of antibodies against mutated citrullinated vimentin and cyclic citrullinated peptide in children with juvenile idiopathic arthritis. Clin Exp Rheumatol 2010; 28:800. [PMID: 20822716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2009] [Accepted: 03/23/2010] [Indexed: 05/29/2023]
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22
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Michaelis K, Wallbrecht K, Kerstan A, Beyersdorf N, Williams C, Kerkau T, Wang XJ, Hünig T, Schön MP. Modulating T cell functions does not alleviate chronic inflammatory skin lesions in K5.TGFβ1 transgenic mice. Exp Dermatol 2010; 19:406-15. [DOI: 10.1111/j.1600-0625.2009.01031.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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Beyersdorf N, Braun A, Vögtle T, Varga-Szabo D, Galdos RR, Kissler S, Kerkau T, Nieswandt B. STIM1-independent T cell development and effector function in vivo. J Immunol 2009; 182:3390-7. [PMID: 19265116 DOI: 10.4049/jimmunol.0802888] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Store-operated Ca(2+) entry (SOCE) is believed to be of pivotal importance in T cell physiology. To test this hypothesis, we generated mice constitutively lacking the SOCE-regulating Ca(2+) sensor stromal interaction molecule 1 (STIM1). In vitro analyses showed that SOCE and Ag receptor complex-triggered Ca(2+) flux into STIM1-deficient T cells is virtually abolished. In vivo, STIM1-deficient mice developed a lymphoproliferative disease despite normal thymic T cell maturation and normal frequencies of CD4(+)Foxp3(+) regulatory T cells. Unexpectedly, STIM1-deficient bone marrow chimeric mice mounted humoral immune responses after vaccination and STIM1-deficient T cells were capable of inducing acute graft-versus-host disease following adoptive transfer into allogeneic hosts. These results demonstrate that STIM1-dependent SOCE is crucial for homeostatic T cell proliferation, but of much lesser importance for thymic T cell differentiation or T cell effector functions.
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Affiliation(s)
- Niklas Beyersdorf
- Institute for Virology and Immunobiology, Deutsche Forschungsgemeinschaft Research Center for Experimental Biomedicine, University of Würzburg, Germany
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24
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Grosse J, Braun A, Varga-Szabo D, Beyersdorf N, Schneider B, Zeitlmann L, Hanke P, Schropp P, Mühlstedt S, Zorn C, Huber M, Schmittwolf C, Jagla W, Yu P, Kerkau T, Schulze H, Nehls M, Nieswandt B. An EF hand mutation in Stim1 causes premature platelet activation and bleeding in mice. J Clin Invest 2008; 117:3540-50. [PMID: 17965774 DOI: 10.1172/jci32312] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2007] [Accepted: 08/15/2007] [Indexed: 12/31/2022] Open
Abstract
Changes in cytoplasmic Ca2+ levels regulate a variety of fundamental cellular functions in virtually all cells. In nonexcitable cells, a major pathway of Ca2+ entry involves receptor-mediated depletion of intracellular Ca2+ stores followed by the activation of store-operated calcium channels in the plasma membrane. We have established a mouse line expressing an activating EF hand motif mutant of stromal interaction molecule 1 (Stim1), an ER receptor recently identified as the Ca2+ sensor responsible for activation of Ca2+ release-activated (CRAC) channels in T cells, whose function in mammalian physiology is not well understood. Mice expressing mutant Stim1 had macrothrombocytopenia and an associated bleeding disorder. Basal intracellular Ca2+ levels were increased in platelets, which resulted in a preactivation state, a selective unresponsiveness to immunoreceptor tyrosine activation motif-coupled agonists, and increased platelet consumption. In contrast, basal Ca2+ levels, but not receptor-mediated responses, were affected in mutant T cells. These findings identify Stim1 as a central regulator of platelet function and suggest a cell type-specific activation or composition of the CRAC complex.
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25
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Tischner D, Weishaupt A, van den Brandt J, Ip CW, Kerkau T, Gold R, Reichardt HM. Antigen therapy of experimental autoimmune encephalomyelitis selectively induces apoptosis of pathogenic T cells. J Neuroimmunol 2007; 183:146-50. [PMID: 17198735 DOI: 10.1016/j.jneuroim.2006.11.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Revised: 11/26/2006] [Accepted: 11/29/2006] [Indexed: 11/30/2022]
Abstract
Administration of high-dose myelin antigen induces massive T cell apoptosis in experimental autoimmune encephalomyelitis (EAE) but the nature of the target cells remains elusive. Here we have used a cell line established in eGFP-transgenic Lewis rats to distinguish between pathogenic and bystander T cells in adoptive transfer EAE. Intravenous application of gpMBP strongly reduced the amount of encephalitogenic cells in spinal cord and spleen while the number of the other T cells remained constant. This could be attributed to their differential sensitivity to apoptosis. Thus, antigen therapy selectively targets pathogenic T cells and should therefore limit potential adverse effects.
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Affiliation(s)
- Denise Tischner
- Institute for Virology and Immunobiology, University of Würzburg, Versbacher Strasse 7, 97078 Würzburg, and Department of Neurology, St. Josef-Hospital, University of Bochum, Germany
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26
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Tischner D, Weishaupt A, van den Brandt J, Müller N, Beyersdorf N, Ip CW, Toyka KV, Hünig T, Gold R, Kerkau T, Reichardt HM. Polyclonal expansion of regulatory T cells interferes with effector cell migration in a model of multiple sclerosis. Brain 2006; 129:2635-47. [PMID: 16921176 DOI: 10.1093/brain/awl213] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [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: 11/13/2022] Open
Abstract
Recruitment of naturally occurring CD4+ CD25+ regulatory T (T(reg)) cells is a highly promising approach for the treatment of experimental autoimmune encephalomyelitis (EAE), a widely used model of multiple sclerosis. Here, we studied the in vivo interaction of T(reg) cells, induced by the monoclonal anti-CD28 antibody JJ316, with encephalitogenic T cell lines established from eGFP-transgenic rats. By tracking these fluorescent cells using flow cytometry and confocal microscopy, we found that the activation and expansion of T(reg) cells inhibited infiltration of the CNS by pathogenic T cells. Interference with effector cell migration occured within the secondary lymphoid organs, since the early therapeutic effects were achieved despite the absence of T(reg) cells in the spinal cord. However, the delayed homing to the CNS seen after prophylactic JJ316 administration indicates that T(reg) cells may play an additional role within the target tissue. In addition, the blood-brain barrier remained largely intact after JJ316 treatment, the secretion of T(H)2 cytokines was augmented and the encephalitogenic T cells exhibited a reduced secretion of IFN-gamma. This in turn resulted in a reduced expression of the chemokine receptor CXCR-3 on effector T cells which may interfere with their capacity to infiltrate the CNS. Importantly, these effects were not achieved by direct action of JJ316 on the encephalitogenic cells. Our data rather suggest that polyclonal activation of T(reg) cells in the secondary lymphoid organs is instrumental in preventing the pathological transmigration of encephalitogenic T cells into the CNS. We anticipate that these results may help to better understand the role of T(reg) cells in controlling autoimmunity in the CNS.
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Affiliation(s)
- Denise Tischner
- Institute for Virology and Immunobiology, University of Würzburg, Germany
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27
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Abstract
T-cell receptor (TCR) stimulation is both central to homeostatic maintenance of CD4(+) CD25(+) regulatory T cells (T(reg) cells) in vivo and a prerequisite for the initiation of suppression by T(reg) cells, both in vivo and in vitro. However, TCR-independent stimulation of T(reg) cells, e.g. with superagonistic CD28-specific monoclonal antibodies (CD28-SA), not only expands these cells in vivo but, as we show here, also mediates large-scale expansion of rat T(reg) cells in vitro. Interestingly, CD28-SA stimulation plus interleukin (IL)-2 was even superior to conventional costimulation plus IL-2 in promoting T(reg) cell growth in vitro. Despite their highly activated phenotype suppression by T(reg) cells expanded in the absence of TCR stimulation remained fully dependent on TCR-triggering for initiation and cell contact was required to exert suppression. With regard to the regulation of suppression by CD28 stimulation we observed that neither the presence of a conventional anti-CD28 monoclonal antibody nor a CD28-SA generally rendered conventional T cells resistant to suppression by preactivated T(reg) cells. Taken together, we provide a novel protocol for long-term propagation of T(reg) cells in vitro and our data are the first to reveal a difference in the signals required for activation and expansion of T(reg) cells and those, involving the TCR, necessary for the initiation of suppression.
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Affiliation(s)
- Niklas Beyersdorf
- University of Würzburg, Institute for Virology and Immunobiology, Würzburg, Germany
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28
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Guntermann C, Trischler M, Beyersdorf N, Mueller P, Kerkau T, Huenig T, Hanke T. OR.93. Superagonistic Ex Vivo and In Vivo Stimulation of T Lymphocytes by Novel Human Cd28-specific Monoclonal Antibodies. Clin Immunol 2006. [DOI: 10.1016/j.clim.2006.04.398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Beyersdorf N, Hanke T, Kerkau T, Hünig T. Superagonistic anti-CD28 antibodies: potent activators of regulatory T cells for the therapy of autoimmune diseases. Ann Rheum Dis 2005; 64 Suppl 4:iv91-5. [PMID: 16239397 PMCID: PMC1766908 DOI: 10.1136/ard.2005.042564] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [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: 01/07/2023]
Abstract
This paper reviews the existing evidence regarding the use of superagonistic anti-CD28 antibodies (CD28 superagonists) for therapeutic manipulation of regulatory T cells (T(reg) cells). The molecular properties of superagonistic anti-CD28 antibodies allow the generation of a strong activating signal in mature T cells, including T(reg) cells, without additional stimulation of the T cell receptor complex. CD28 superagonist administration in vivo leads to the preferential expansion and strong activation of naturally occurring CD4+CD25+CTLA-4+FoxP3+ T(reg) cells over conventional T cells. In animal models, both prophylactic and therapeutic administration of a CD28 superagonist prevented or at least greatly mitigated clinical symptoms and induced remission. Adoptive transfer experiments have further shown that CD28 superagonists mediate protection by expansion and activation of CD4+CD25+ T(reg) cells. Therefore, superagonistic anti-CD28 antibodies offer a promising novel treatment option for human autoimmune diseases and the first clinical trials are eagerly awaited.
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Affiliation(s)
- N Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Versbacherstr. 7, 97078 Würzburg, Germany
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30
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Beyersdorf N, Gaupp S, Balbach K, Schmidt J, Toyka KV, Lin CH, Hanke T, Hünig T, Kerkau T, Gold R. Selective targeting of regulatory T cells with CD28 superagonists allows effective therapy of experimental autoimmune encephalomyelitis. ACTA ACUST UNITED AC 2005; 202:445-55. [PMID: 16061730 PMCID: PMC2213080 DOI: 10.1084/jem.20051060] [Citation(s) in RCA: 158] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
CD4+CD25+ regulatory T cells (T reg cells) play a key role in controlling autoimmunity and inflammation. Therefore, therapeutic agents that are capable of elevating numbers or increasing effector functions of this T cell subset are highly desirable. In a previous report we showed that a superagonistic monoclonal antibody specific for rat CD28 (JJ316) expands and activates T reg cells in vivo and upon short-term in vitro culture. Here we demonstrate that application of very low dosages of the CD28 superagonist into normal Lewis rats is sufficient to induce T reg cell expansion in vivo without the generalized lymphocytosis observed with high dosages of JJ316. Single i.v. administration of a low dose of the CD28 superagonist into Dark Agouti (DA) rats or Lewis rats that suffered from experimental autoimmune encephalomyelitis (EAE) proved to be highly and equally efficacious as high-dose treatment. Finally, we show that T reg cells that were isolated from CD28-treated animals displayed enhanced suppressive activity toward myelin basic protein–specific T cells in vitro, and, upon adoptive transfer, protected recipients from EAE. Our data indicate that this class of CD28-specific monoclonal antibodies targets CD4+CD25+ T reg cells and provides a novel means for the effective treatment of multiple sclerosis and other autoimmune diseases.
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MESH Headings
- Animals
- Antibodies, Monoclonal/administration & dosage
- Antibodies, Monoclonal/immunology
- CD28 Antigens/immunology
- CD4-Positive T-Lymphocytes/immunology
- Cell Proliferation/drug effects
- Dose-Response Relationship, Drug
- Dose-Response Relationship, Immunologic
- Encephalomyelitis, Autoimmune, Experimental/drug therapy
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Immunosuppression Therapy
- Injections, Intravenous
- Lymphocyte Activation/drug effects
- Lymphocyte Activation/immunology
- Multiple Sclerosis/drug therapy
- Multiple Sclerosis/immunology
- Rats
- Rats, Inbred Lew
- Receptors, Interleukin-2
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Affiliation(s)
- Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, D-97078 Würzburg, Germany
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31
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Beyersdorf N, Hanke T, Kerkau T, Hünig T. CD28 superagonists put a break on autoimmunity by preferentially activating CD4+CD25+ regulatory T cells. Autoimmun Rev 2005; 5:40-5. [PMID: 16338210 DOI: 10.1016/j.autrev.2005.06.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Accepted: 06/18/2005] [Indexed: 10/25/2022]
Abstract
There is strong evidence that a quantitative and/or functional deficiency in CD4+CD25+ regulatory T cells (T(reg) cells) plays a key role in the pathogenesis of many human autoimmune diseases. Therefore, targeting regulatory T cells with novel forms of immunotherapy should provide a means for successfully battling autoimmunity in humans. We have recently shown that superagonistic monoclonal antibodies with specificity for CD28 (CD28 superagonists) are capable of activating and preferentially expanding T(reg) cells over conventional T cells in vitro and, importantly, also in vivo. Moreover, therapeutic application of CD28 superagonists elicited profound therapeutic effects in various animal models of autoimmunity, including experimental autoimmune encephalomyelitis (EAE) and adjuvant arthritis (AA) of the Lewis rat. Adoptive transfer experiments with T(reg) cells from CD28 superagonist-treated rats proved that protection from EAE is, indeed, mediated by CD28 superagonist-activated T(reg) cells. Therefore, effective targeting of CD4+CD25+ regulatory T cells makes CD28 superagonists a promising novel tool for the treatment of human autoimmune diseases.
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Affiliation(s)
- Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Versbacherstr. 7, 97078 Würzburg, Germany
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32
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Ströbel P, Rosenwald A, Beyersdorf N, Kerkau T, Elert O, Murumägi A, Sillanpää N, Peterson P, Hummel V, Rieckmann P, Burek C, Schalke B, Nix W, Kiefer R, Müller-Hermelink HK, Marx A. Selective loss of regulatory T cells in thymomas. Ann Neurol 2005; 56:901-4. [PMID: 15562414 DOI: 10.1002/ana.20340] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [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: 01/02/2023]
Abstract
Myasthenia gravis (MG) is the prime autoimmune manifestation of thymomas. We investigated the generation of T cells with a regulatory phenotype (T(R)) in thymomas with and without associated MG. In patients with MG(+) thymomas, maturation and export of T(R) cells but not of other T-cell subsets was significantly reduced. We conclude that imbalance between effector and regulatory T cells in thymomas may be involved in modulation of onset and/or severity of MG.
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Affiliation(s)
- Philipp Ströbel
- Institute of Pathology, University of Würzburg, Würzburg, Germany.
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33
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Abstract
Slow recovery of T-cell numbers and function contributes to the high incidence of life-threatening infections after cytotoxic cancer therapies. We have tested the therapeutic potential of a novel class of superagonistic CD28-specific antibodies that induce polyclonal T-cell proliferation without T-cell receptor engagement in an experimental rat model of T lymphopenia. We show that in lethally irradiated, bone marrow-reconstituted hosts, CD28 superagonist is able to dramatically accelerate repopulation by a small inoculum of mature, allotype-marked T cells. CD28-driven recovery of CD4 cells was superior to that of CD8 T cells. CD28 superagonist- expanded CD4 T cells had maintained repertoire diversity and were functional both in vitro and in vivo, suggesting that treatment with a human CD28-specific superagonist will protect T-lymphopenic patients from opportunistic infections.
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Affiliation(s)
- Karin Elflein
- Institute of Virology and Immunobiology, University of Würzburg, Versbacher Strasse 7, 97078 Würzburg, Germany.
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34
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Eck M, Schmausser B, Kerkau T, Greiner A, Kraus M, Fischbach W, Müller-Hermelink HK. Autoantibodies in gastric MALT-type lymphoma. Ann Oncol 2003; 14:1153-4. [PMID: 12853361 DOI: 10.1093/annonc/mdg304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Lühder F, Huang Y, Dennehy KM, Guntermann C, Müller I, Winkler E, Kerkau T, Ikemizu S, Davis SJ, Hanke T, Hünig T. Topological requirements and signaling properties of T cell-activating, anti-CD28 antibody superagonists. J Exp Med 2003; 197:955-66. [PMID: 12707299 PMCID: PMC2193880 DOI: 10.1084/jem.20021024] [Citation(s) in RCA: 145] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Full activation of naive T cells requires both engagement of the T cell antigen receptor (TCR; signal 1) and costimulatory signaling by CD28 (signal 2). We previously identified two types of rat CD28-specific monoclonal antibodies (mAbs): "conventional," TCR signaling-dependent costimulatory mAbs and "superagonistic" mAbs capable of inducing the full activation of primary resting T cells in the absence of TCR ligation both in vitro and in vivo. Using chimeric rat/mouse CD28 molecules, we show that the superagonists bind exclusively to the laterally exposed C"D loop of the immunoglobulin-like domain of CD28 whereas conventional, costimulatory mAbs recognize an epitope close to the binding site for the natural CD80/CD86 ligands. Unexpectedly, the C"D loop reactivity of a panel of new antibodies raised against human CD28 could be predicted solely on the basis of their superagonistic properties. Moreover, mouse CD28 molecules engineered to express the rat or human C"D loop sequences activated T cell hybridomas without TCR ligation when cross-linked by superagonistic mAbs. Finally, biochemical analysis revealed that superagonistic CD28 signaling activates the nuclear factor kappaB pathway without inducing phosphorylation of either TCRzeta or ZAP70. Our findings indicate that the topologically constrained interactions of anti-CD28 superagonists bypass the requirement for signal 1 in T cell activation. Antibodies with this property may prove useful for the development of T cell stimulatory drugs.
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MESH Headings
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/metabolism
- CD28 Antigens/genetics
- CD28 Antigens/immunology
- CD28 Antigens/metabolism
- Epitopes
- Humans
- Lymphocyte Activation
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Models, Molecular
- NF-kappa B/metabolism
- Protein Conformation
- Protein-Tyrosine Kinases/metabolism
- Rats
- Rats, Inbred Lew
- Receptors, Antigen, T-Cell/immunology
- Receptors, Antigen, T-Cell/metabolism
- Recombinant Fusion Proteins/immunology
- Recombinant Fusion Proteins/metabolism
- Signal Transduction/physiology
- T-Lymphocytes/cytology
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- ZAP-70 Protein-Tyrosine Kinase
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Affiliation(s)
- Fred Lühder
- Institute for Virology and Immunobiology, University of Würzburg, Versbacher Str. 7, D-97078 Würzburg, Germany
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36
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Kutsch O, Vey T, Kerkau T, Hünig T, Schimpl A. HIV type 1 abrogates TAP-mediated transport of antigenic peptides presented by MHC class I. Transporter associated with antigen presentation. AIDS Res Hum Retroviruses 2002; 18:1319-25. [PMID: 12487820 DOI: 10.1089/088922202320886361] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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: 12/21/2022] Open
Abstract
Downregulation of MHC class I expression following human immunodeficiency virus 1 (HIV-1) infection is thought to play an important role in viral escape from immune recognition by cytotoxic T-lymphocytes (CTLs). Since exogenous addition of HIV-1-derived peptides restores susceptibility of HIV-1-infected cells to CTL-mediated lysis, we tested whether endogenous peptide loading is impaired in these cells. Our results show that in HIV-1-infected cells the ability of the transporter associated with antigen presentation (TAP) to translocate antigenic peptides from the cytosol to the lumen of the ER for presentation on MHC class I molecules is abolished. These data suggest that interference with the supply of antigenic peptides to the MHC class I pathway provides an additional mechanism by which HIV-1 evades the CTL-mediated immune response.
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Affiliation(s)
- O Kutsch
- Institute of Immunobiology and Virology, The Julius-Maximilians University, Würzburg, Germany.
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37
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Halbach A, Nierwetberg D, Müller JG, Sauer U, Kerkau T, Stolte N, Hofmann P, Czub S, ter Meulen V, Sopper S. Total numbers of lymphocyte subsets in different lymph node regions of uninfected and SIV-infected macaques. J Med Primatol 2000; 29:148-57. [PMID: 11085577 DOI: 10.1034/j.1600-0684.2000.290308.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 11/23/2022]
Abstract
Human immunodeficiency virus (HIV) infection leads to a decline of CD4+ T-cells in blood. Because blood represents only a small proportion of the total lymphocyte pool, it is important to investigate other lymphoid organs. So far, only relative proportions of lymphocyte subsets in single peripheral lymph node (LN) regions of HIV-infected patients and simian immunodeficiency virus (SIV)-infected macaques have been documented. We have therefore quantified the absolute numbers of lymphocyte subsets in blood and six different LN regions of 10 uninfected and 26 SIV-infected macaques. In addition, we have determined the expression of markers of activation and differentiation. Already, in uninfected monkeys, there were significant differences in the cellular composition of different LN regions. Infection with SIV resulted in drastic changes in the proportion as well as absolute numbers of different lymphocyte subsets. Moreover, the relative contribution of the single LN regions to the total lymphocyte pool was also altered.
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Affiliation(s)
- A Halbach
- Inst. f. Pathologie, Würzburg, Germany
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38
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Neben K, Heidbreder M, Müller J, Marxer A, Petry H, Didier A, Schimpl A, Hünig T, Kerkau T. Impaired thymopoietic potential of immature CD3(-)CD4(+)CD8(-) T cell precursors from SIV-infected rhesus monkeys. Int Immunol 1999; 11:1509-18. [PMID: 10464172 DOI: 10.1093/intimm/11.9.1509] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 11/13/2022] Open
Abstract
Immature thymocyte subpopulations were examined for their capacity to differentiate in a newly developed xenogeneic monkey-mouse fetal thymus organ culture (FTOC) system. We provide evidence for impaired precursor function of CD3(-)CD4(+)CD8(-) thymocytes after in vivo infection with SIVmac251 as indicated by a reduced cell number per FTOC and a lower percentage of thymocytes with more mature phenotypes. Addition of recombinant SIV glycoprotein 120 (rgp120) also resulted in a dose-dependent impairment of T cell maturation in FTOC. The data suggest that in patients infected with HIV, T cell maturation and thus replenishment of peripheral pools may be compromised as a result of intrathymic infection or circulating viral gp120.
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Affiliation(s)
- K Neben
- Institute of Virology and Immunobiology, University of Würzburg, Versbacher Strasse 7, 97078 Würzburg, Germany
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39
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Krenn V, Molitoris R, Berek C, Sack U, König A, Müller-Deubert S, Kempf V, Mosgoeller W, Kerkau T, Vollmers HP, Müller-Hermelink HK. A novel monospecific IgG2/lambda-autoantibody with specificity for a mitochondrial antigen: evidence for an antigen-driven pathogenetic B-cell response in rheumatoid synovial tissue, induced by tissue alteration. J Transl Med 1998; 78:485-96. [PMID: 9564893] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
To elucidate the pathogenic role of synovial B cells in rheumatoid arthritis (RA), nine human IgG/lambda-secreting B-cell hybridomas from rheumatoid synovial tissue of a patient with definite RA were screened by enzyme-linked immunosorbent assay and indirect immunofluorescence on tissue cryosections for detection of antibodies against autoantigens. One IgG2/lambda monoclonal antibody (mAb) from the B-cell hybridoma ELG211/15/63 (= hybr63) exhibited intense immunofluorescence reactivity in the cytoplasm of chondrocytes and epithelial cells of the gastrointestinal tract, especially in parietal cells of gastric mucosa (human and mouse tissue), representing a mitochondrial pattern. This result was confirmed by morphometric analysis of immunoelectron microscopy data, exhibiting a significantly higher labeling density in mitochondria (p < or = 0.001) than in the cytoplasmic background, with predominant staining in the inner mitochondrial membrane and mitochondrial matrix (p < or = 0.05). Immunoblotting experiments carried out with gastric mucosa, and a mitochondrial protein preparation revealed two major proteins of 38 and 50 kd under reducing conditions. The analysis of the IgV(H) genes from this B-cell hybridoma showed highest homology to the human germline gene DP53 (96%). The IgV(L) region gave highest homology to the human germline gene DP5 (93%). In the complementarity-determining regions, residues of the H- and L-chain variable regions replacement mutations only indicated that this B-cell clone had been antigen-selected for its affinity (ratio of replacement to silent mutations: > or = 7). To analyze the in vivo expansion of the B-cell clone, primers specific for the V(H) to D to J(H) rearrangement of this B-cell hybridoma were used. Specific amplifications could be detected within part of the synovial tissue but not within the cells of the synovial fluid and peripheral blood of the patient. The ability of the IgG2/lambda mAb to induce an inflammatory reaction was tested by intraperitoneal application in severe combined immunodeficiency (SCID) mice, which resulted in an inflammatory, predominantly granulocytic infiltration of the peritoneum. Consequently, intrasynovial cell death or cartilage destruction seems to be a possible source of liberation of mitochondrial antigens, inducing a local, antigen-driven IgG2/lambda B-cell response with the ability to induce an inflammatory reaction. These data suggest that tissue destruction may serve as a source of arthritogenic antigens that perpetuate and amplify the local pernicious inflammatory process in RA synovialitis.
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Affiliation(s)
- V Krenn
- Institute of Pathology, University of Würzburg, Germany
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40
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Faller G, Steininger H, Kränzlein J, Maul H, Kerkau T, Hensen J, Hahn EG, Kirchner T. Antigastric autoantibodies in Helicobacter pylori infection: implications of histological and clinical parameters of gastritis. Gut 1997; 41:619-23. [PMID: 9414967 PMCID: PMC1891571 DOI: 10.1136/gut.41.5.619] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND It has recently been shown that humoral antigastric autoreactivities occur in a substantial number of Helicobacter pylori infected patients. AIMS To analyse the relevance of such antigastric autoantibodies for histological and serological parameters of the infection as well as for the clinical course. METHODS Gastric biopsy samples and sera from 126 patients with upper abdominal complaints were investigated for evidence of H pylori infection using histology and serology. Autoantibodies against epitopes in human gastric mucosa were detected by immunohistochemical techniques. Histological and clinical findings of all patients were then correlated with the detection of antigastric autoantibodies. RESULTS H pylori infection was significantly associated with antigastric autoantibodies reactive with the luminal membrane of the foveolar epithelium and with canalicular structures within parietal cells. The presence of the latter autoantibodies was significantly correlated with the severity of body gastritis, gastric mucosa atrophy, elevated fasting gastrin concentrations, and a decreased ratio of serum pepsinogen I:II. Furthermore the presence of anticanalicular autoantibodies was associated with a greater than twofold reduced prevalence for duodenal ulcer. CONCLUSION The data indicate that antigastric autoantibodies play a role in the pathogenesis and outcome of H pylori gastritis, in particular in the development of gastric mucosal atrophy.
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Affiliation(s)
- G Faller
- Institute of Pathology, University of Erlangen-Nürnberg, Germany
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41
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Kerkau T, Bacik I, Bennink JR, Yewdell JW, Húnig T, Schimpl A, Schubert U. The human immunodeficiency virus type 1 (HIV-1) Vpu protein interferes with an early step in the biosynthesis of major histocompatibility complex (MHC) class I molecules. J Exp Med 1997; 185:1295-305. [PMID: 9104816 PMCID: PMC2196253 DOI: 10.1084/jem.185.7.1295] [Citation(s) in RCA: 141] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The human immunodeficiency virus type 1 (HIV-1) vpu gene encodes a small integral membrane phosphoprotein with two established functions: degradation of the viral coreceptor CD4 in the endoplasmic reticulum (ER) and augmentation of virus particle release from the plasma membrane of HIV-1-infected cells. We show here that Vpu is also largely responsible for the previously observed decrease in the expression of major histocompatibility complex (MHC) class I molecules on the surface of HIV-1-infected cells. Cells infected with HIV-1 isolates that fail to express Vpu, or that express genetically modified forms of Vpu that no longer induce CD4 degradation, exhibit little downregulation of MHC class I molecules. The effect of Vpu on class I biogenesis was analyzed in more detail using a Vpu-expressing recombinant vaccinia virus (VV). VV-expressed Vpu induces the rapid loss of newly synthesized endogenous or VV-expressed class I heavy chains in the ER, detectable either biochemically or by reduced cell surface expression. This effect is of similar rapidity and magnitude as the VV-expressed Vpu-induced degradation of CD4. Vpu had no discernible effects on cell surface expression of VV-expressed mouse CD54, demonstrating the selectivity of its effects on CD4 and class I heavy chains. VV-expressed Vpu does not detectably affect class I molecules that have been exported from the ER. The detrimental effects of Vpu on class I molecules could be distinguished from those caused by VV-expressed herpes virus protein ICP47, which acts by decreasing the supply of cytosolic peptides to class I molecules, indicating that Vpu functions in a distinct manner from ICP47. Based on these findings, we propose that Vpu-induced downregulation of class I molecules may be an important factor in the evolutionary selection of the HIV-1-specific vpu gene by contributing to the inability of CD8+ T cells to eradicate HIV-1 from infected individuals.
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Affiliation(s)
- T Kerkau
- Institute of Virology and Immunobiology, University of Würzburg, Germany
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42
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Baier S, Gottschalk G, Kerkau T, Luhmann T, Martins M, Richter M, Snell G, Zimmermann P. Electron-ion coincidence spectroscopy on atomic barium in the excitation range of the 4d giant resonance. Phys Rev Lett 1994; 72:2847-2850. [PMID: 10056000 DOI: 10.1103/physrevlett.72.2847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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43
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Müller JG, Krenn V, Schindler C, Czub S, Stahl-Hennig C, Coulibaly C, Hunsmann G, Kneitz C, Kerkau T, Rethwilm A. Alterations of thymus cortical epithelium and interdigitating dendritic cells but no increase of thymocyte cell death in the early course of simian immunodeficiency virus infection. Am J Pathol 1993; 143:699-713. [PMID: 8362972 PMCID: PMC1887226] [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] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The role of the thymus in the pathogenesis of simian acquired immunodeficiency syndrome was investigated in 18 juvenile rhesus monkeys (Macaca mulatta). The thymus was infected from the first week post-SIVmac inoculation, but the amount of virus-positive cells was very low (< 1 in 10(4) T cells) as demonstrated by polymerase chain reaction and in situ hybridization. First morphological alteration was a narrowing of the cortex at 12 and 24 wpi. Morphometry revealed no increase of pyknotic T cells but a decrease of the proliferation rate and flow cytometry showed a reduction of the immature CD4+/CD8+ double-positive T cells. Ultrastructural analysis revealed vacuolization, shrinkage, and finally cytolysis of the cortical epithelial cells and the interdigitating dendritic cells. Immunofluorescence staining exhibited a widespread loss of cortical epithelial cells. This damage to the thymic microenvironment could explain the breakdown of the intrathymic T cell proliferation. It preceded fully developed simian acquired immunodeficiency syndrome and is therefore considered to play a major role in its pathogenesis.
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Affiliation(s)
- J G Müller
- Institute of Pathology, University of Würzburg, Germany
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44
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Kneitz C, Kerkau T, Müller J, Coulibaly C, Stahl-Hennig C, Hunsmann G, Hünig T, Schimpl A. Early phenotypic and functional alterations in lymphocytes from simian immunodeficiency virus infected macaques. Vet Immunol Immunopathol 1993; 36:239-55. [PMID: 8506614 DOI: 10.1016/0165-2427(93)90022-v] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 01/31/2023]
Abstract
Phenotypic and functional changes in lymphocytes from rhesus monkeys (Macaca mulatta) were investigated during the first 6 months after infection with SIV mac 32H. Animals preimmunized with keyhole limpet hemocyanin (KLH) were sacrificed 1, 3, 6, 12, and 24 weeks post infection. Subset composition and function of lymphocytes from blood, spleen, lymph node and thymus were analysed. In addition to a rapid decline in CD4/CD8 ratios, a massive reduction in CD29+ CD4+ cells was seen in the periphery. Although depletion of this subset was observed throughout the course of this experiment, the loss of proliferative T cell responses was most pronounced very early after infection and partially recovered after Month 3. Polyclonal cytotoxic responses were only slightly affected. In the thymus, a gradual, but moderate loss of CD4+CD8+ immature thymocytes, and a relative increase in both CD4+ and CD8+ mature subsets was observed. Infectious virus was readily recovered from homogenates of lymph node and spleen, but not of thymus tissue. Interestingly, however, virus was detected in thymocytes from all infected animals by cocultivation with a simian immunodeficiency virus (SIV) susceptible cell line.
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Affiliation(s)
- C Kneitz
- Institute of Virology and Immunobiology, University of Würzburg, Germany
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45
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Abstract
HIV infection of CD4+ peripheral blood lymphocytes leads to a loss of MHC class I molecules on the surface of the infected cells as detectable by monoclonal antibody staining and flow cytometry. Incubation of the infected cells at 26 degrees C or treatment at 37 degrees C with peptides leads to upregulation of MHC class I to levels equal to those found on uninfected cells cultured under the same conditions. The data suggest that, after HIV infection, the mechanisms responsible for peptide generation, peptide transport and thus stable association between peptides and MHC class I molecules are severely affected.
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Affiliation(s)
- T Kerkau
- Institute of Virology and Immunobiology, University of Würzburg, Germany
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46
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Abstract
By means of indirect immunofluorescence analysis we investigated the effect of HIV-1 infection on HLA class I surface antigens. We report here that in CD4+ HeLa cells, in H9 cells, and in peripheral T lymphocytes HLA class I antigens are downregulated following infection with HIV-1. The downregulation is effected at a posttranscriptional level since the amounts of HLA class I specific mRNA are similar in infected and uninfected cells. This phenomenon is not only correlated with the state of infection, that is, the presence of P24 of HIV-1 in the cells, but also depends on the time of infection. Upon HLA class I downregulation by HIV infection, the specific lysis of peripheral blood cells by allogeneic CTL is reduced.
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Affiliation(s)
- T Kerkau
- Institut für Virologie und Immunobiologie der Universität, Würzburg, FRG
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