1
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Yordanova IA, Jürchott K, Steinfelder S, Vogt K, Krüger U, Kühl AA, Sawitzki B, Hartmann S. The Host Peritoneal Cavity Harbors Prominent Memory Th2 and Early Recall Responses to an Intestinal Nematode. Front Immunol 2022; 13:842870. [PMID: 35418979 PMCID: PMC8996181 DOI: 10.3389/fimmu.2022.842870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 03/04/2022] [Indexed: 11/23/2022] Open
Abstract
Intestinal parasitic nematodes affect a quarter of the world’s population, typically eliciting prominent effector Th2-driven host immune responses. As not all infected hosts develop protection against reinfection, our current understanding of nematode-induced memory Th2 responses remains limited. Here, we investigated the activation of memory Th2 cells and the mechanisms driving early recall responses to the enteric nematode Heligmosomoides polygyrus in mice. We show that nematode-cured mice harbor memory Th2 cells in lymphoid and non-lymphoid organs with distinct transcriptional profiles, expressing recirculation markers like CCR7 and CD62-L in the mesenteric lymph nodes (mLN), and costimulatory markers like Ox40, as well as tissue homing and activation markers like CCR2, CD69 and CD40L in the gut and peritoneal cavity (PEC). While memory Th2 cells persist systemically in both lymphoid and non-lymphoid tissues following cure of infection, peritoneal memory Th2 cells in particular displayed an initial prominent expansion and strong parasite-specific Th2 responses during early recall responses to a challenge nematode infection. This effect was paralleled by a significant influx of dendritic cells (DC) and eosinophils, both also appearing exclusively in the peritoneal cavity of reinfected mice. In addition, we show that within the peritoneal membrane lined by peritoneal mesothelial cells (PeM), the gene expression levels of cell adhesion markers VCAM-1 and ICAM-1 decrease significantly in response to a secondary infection. Overall, our findings indicate that the host peritoneal cavity in particular harbors prominent memory Th2 cells and appears to respond directly to H. polygyrus by an early recall response via differential regulation of cell adhesion markers, marking the peritoneal cavity an important site for host immune responses to an enteric pathogen.
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Affiliation(s)
- Ivet A Yordanova
- Institute of Immunology, Center for Infection Medicine, Freie Universität Berlin, Berlin, Germany
| | - Karsten Jürchott
- Berlin Institute of Health Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany
| | | | - Katrin Vogt
- Institute of Medical Immunology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Ulrike Krüger
- Core Unite Genomics, Berlin Institute of Health (BIH), Berlin, Germany
| | - Anja A Kühl
- Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin und Humboldt-Universität zu Berlin, iPATH.Berlin, Core Unit for Immunopathology for Experimental Models, Berlin, Germany
| | - Birgit Sawitzki
- Institute of Medical Immunology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Susanne Hartmann
- Institute of Immunology, Center for Infection Medicine, Freie Universität Berlin, Berlin, Germany
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2
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Yordanova IA, Ebner F, Schulz AR, Steinfelder S, Rosche B, Bolze A, Paul F, Mei HE, Hartmann S. The Worm-Specific Immune Response in Multiple Sclerosis Patients Receiving Controlled Trichuris suis Ova Immunotherapy. Life (Basel) 2021; 11:life11020101. [PMID: 33572978 PMCID: PMC7912101 DOI: 10.3390/life11020101] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/19/2021] [Accepted: 01/25/2021] [Indexed: 12/19/2022] Open
Abstract
Considering their potent immunomodulatory properties, therapeutic applications of Trichuris suis ova (TSO) are studied as potential alternative treatment of autoimmune disorders like multiple sclerosis (MS), rheumatoid arthritis (RA), or inflammatory bowel disease (IBD). Clinical phase 1 and 2 studies have demonstrated TSO treatment to be safe and well tolerated in MS patients, however, they reported only modest clinical efficacy. We therefore addressed the cellular and humoral immune responses directed against parasite antigens in individual MS patients receiving controlled TSO treatment (2500 TSO p.o. every 2 weeks for 12 month). Peripheral blood mononuclear cells (PBMC) of MS patients treated with TSO (n = 5) or placebo (n = 6) were analyzed. A continuous increase of serum IgG and IgE antibodies specific for T. suis excretory/secretory antigens was observed up to 12 months post-treatment. This was consistent with mass cytometry analysis identifying an increase of activated HLA-DRhigh plasmablast frequencies in TSO-treated patients. While stable and comparable frequencies of total CD4+ and CD8+ T cells were detected in placebo and TSO-treated patients over time, we observed an increase of activated HLA-DR+CD4+ T cells in TSO-treated patients only. Frequencies of Gata3+ Th2 cells and Th1/Th2 ratios remained stable during TSO treatment, while Foxp3+ Treg frequencies varied greatly between individuals. Using a T. suis antigen-specific T cell expansion assay, we also detected patient-to-patient variation of antigen-specific T cell recall responses and cytokine production. In summary, MS patients receiving TSO treatment established a T. suis-specific T- and B-cell response, however, with varying degrees of T cell responses and cellular functionality across individuals, which might account for the overall miscellaneous clinical efficacy in the studied patients.
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Affiliation(s)
- Ivet A. Yordanova
- Institute of Immunology, Center for Infection Medicine, Freie Universität Berlin, D-14163 Berlin, Germany; (I.A.Y.); (F.E.)
| | - Friederike Ebner
- Institute of Immunology, Center for Infection Medicine, Freie Universität Berlin, D-14163 Berlin, Germany; (I.A.Y.); (F.E.)
| | - Axel Ronald Schulz
- German Rheumatism Research Center Berlin (DRFZ), a Leibniz Institute, D-10117 Berlin, Germany; (A.R.S.); (H.E.M.)
| | | | - Berit Rosche
- Department of Neurology and Experimental Neurology, Charité—Universitätsmedizin Berlin, D-10117 Berlin, Germany;
- Clinical and Experimental Multiple Sclerosis Research Center, Charité—Universitätsmedizin Berlin, D-10117 Berlin, Germany;
| | - Anna Bolze
- NeuroCure Clinical Research Center, Charité—Universitätsmedizin Berlin, D-10117 Berlin, Germany;
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine, Charité—Universitätsmedizin Berlin, D-10117 Berlin, Germany
| | - Friedemann Paul
- Clinical and Experimental Multiple Sclerosis Research Center, Charité—Universitätsmedizin Berlin, D-10117 Berlin, Germany;
- NeuroCure Clinical Research Center, Charité—Universitätsmedizin Berlin, D-10117 Berlin, Germany;
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine, Charité—Universitätsmedizin Berlin, D-10117 Berlin, Germany
| | - Henrik E. Mei
- German Rheumatism Research Center Berlin (DRFZ), a Leibniz Institute, D-10117 Berlin, Germany; (A.R.S.); (H.E.M.)
| | - Susanne Hartmann
- Institute of Immunology, Center for Infection Medicine, Freie Universität Berlin, D-14163 Berlin, Germany; (I.A.Y.); (F.E.)
- Correspondence:
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3
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Venugopal G, O'Regan NL, Babu S, Schumann RR, Srikantam A, Merle R, Hartmann S, Steinfelder S. Association of a PD-L2 Gene Polymorphism with Chronic Lymphatic Filariasis in a South Indian Cohort. Am J Trop Med Hyg 2019; 100:344-350. [PMID: 30594267 DOI: 10.4269/ajtmh.18-0731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Lymphatic filariasis (LF) is a parasitic infection, caused by three closely related nematodes, namely Wuchereria bancrofti, Brugia malayi, and Brugia timori. Previously, we have shown that lysate from B. malayi microfilariae induces the expression of interleukin (IL)-10 and programmed death-ligand (PD-L) 1 on monocytes, which lead to inhibition of CD4+ T-cell responses. In this study, we investigated associations of IL-10 and programmed cell death (PD)-1 pathway gene polymorphisms with clinical manifestation in LF. We evaluated the frequency of alleles and genotypes of IL-10 (rs3024496, rs1800872), IL-10RA (rs3135932), IL-10RB (rs2834167), PD-1 (rs2227982, rs10204525), PD-L1 (rs4143815), PD-L2 (rs7854413), and single-nucleotide polymorphisms (SNPs) in 103 patients with chronic pathology (CP), such as elephantiasis or hydrocele and 106 endemic normal (EN) individuals from a South Indian population living in an area endemic for LF. Deviations from the Hardy-Weinberg equilibrium were tested, and we found a significant difference between the frequency of polymorphisms in PD-L2 (rs7854413; P < 0.001) and IL-10RB (rs2834167; P = 0.012) between the CP and the EN group, whereas there were no significant differences found among IL-10, IL-10RA, PD-1, and PD-L1 SNPs. A multivariate analysis showed that the existence of a CC genotype in PD-L2 SNP rs7854413 is associated with a higher risk of developing CP (OR: 2.942; 95% confidence interval [CI]: 0.957-9.046; P = 0.06). Altogether, these data indicate that a genetically determined individual difference in a non-synonymous missense SNP of PD-L2 might influence the susceptibility to CP.
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Affiliation(s)
- Gopinath Venugopal
- Centre for Infection Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Noëlle L O'Regan
- Centre for Infection Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Subash Babu
- National Institutes of Health, National Institute of Research in Tuberculosis (NIRT), International Centre for Excellence in Research, Chennai, India
| | - Ralf R Schumann
- Institute for Microbiology and Hygiene, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Aparna Srikantam
- Blue Peter Public Health and Research Centre, LEPRA Society, Hyderabad, India
| | - Roswitha Merle
- Department of Veterinary Medicine, Institute for Veterinary Epidemiology and Biostatistics, Freie Universität Berlin, Berlin, Germany
| | - Susanne Hartmann
- Centre for Infection Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Svenja Steinfelder
- Centre for Infection Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany.,Department of Neural Circuits and Behavior, Max Delbrück Center for Molecular Medicine, Berlin, Germany
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4
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Ahmed N, Heitlinger E, Affinass N, Kühl AA, Xenophontos N, Jarquin VH, Jost J, Steinfelder S, Hartmann S. A Novel Non-invasive Method to Detect RELM Beta Transcript in Gut Barrier Related Changes During a Gastrointestinal Nematode Infection. Front Immunol 2019; 10:445. [PMID: 30915083 PMCID: PMC6423163 DOI: 10.3389/fimmu.2019.00445] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 12/14/2018] [Accepted: 02/19/2019] [Indexed: 12/16/2022] Open
Abstract
Currently, methods for monitoring changes of gut barrier integrity and the associated immune response via non-invasive means are limited. Therefore, we aimed to develop a novel non-invasive technique to investigate immunological host responses representing gut barrier changes in response to infection. We identified the mucous layer on feces from mice to be mainly composed of exfoliated intestinal epithelial cells. Expression of RELM-β, a gene prominently expressed in intestinal nematode infections, was used as an indicator of intestinal cellular barrier changes to infection. RELM-β was detected as early as 6 days post-infection (dpi) in exfoliated epithelial cells. Interestingly, RELM-β expression also mirrored the quality of the immune response, with higher amounts being detectable in a secondary infection and in high dose nematode infection in laboratory mice. This technique was also applicable to captured worm-infected wild house mice. We have therefore developed a novel non-invasive method reflecting gut barrier changes associated with alterations in cellular responses to a gastrointestinal nematode infection.
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Affiliation(s)
- Norus Ahmed
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Emanuel Heitlinger
- Research Group Ecology and Evolution of Molecular Parasite Host Interactions, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany.,Institute for Biology, Molecular Parasitology, Humboldt Universität, Berlin, Germany
| | - Nicole Affinass
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Anja A Kühl
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, iPATH.Berlin, Berlin, Germany
| | - Natasa Xenophontos
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Victor Hugo Jarquin
- Research Group Ecology and Evolution of Molecular Parasite Host Interactions, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany.,Institute for Biology, Molecular Parasitology, Humboldt Universität, Berlin, Germany
| | - Jenny Jost
- Research Group Ecology and Evolution of Molecular Parasite Host Interactions, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Svenja Steinfelder
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany.,Department of Neuroscience, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Susanne Hartmann
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
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5
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Venugopal G, Mueller M, Hartmann S, Steinfelder S. Differential immunomodulation in human monocytes versus macrophages by filarial cystatin. PLoS One 2017; 12:e0188138. [PMID: 29141050 PMCID: PMC5687743 DOI: 10.1371/journal.pone.0188138] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 06/03/2017] [Accepted: 11/01/2017] [Indexed: 12/19/2022] Open
Abstract
Parasitic nematodes have evolved powerful immunomodulatory molecules to enable their survival in immunocompetent hosts by subverting immune responses and minimizing pathological processes. One filarial molecule known to counteract host immune responses by inducing IL-10 and regulatory macrophages in mice is filarial cystatin. During a patent filarial infection monocytes encounter microfilariae in the blood, an event that occurs in asymptomatically infected filariasis patients that are immunologically hyporeactive. The microfilarial larval stage was formerly shown to induce human regulatory monocytes and macrophages. Thus, here we aim was to determine how filarial cystatin of the human pathogenic filaria Brugia malayi (BmCPI-2) contributes to immune hyporesponsiveness in human monocytes and macrophages elicited by microfilaria. For this purpose, filarial cystatin was depleted from microfilarial lysate (Mf). Detecting the immunomodulatory potential of cystatin-depleted Mf revealed that IL-10, but not IL-8 and IL-6 induction in monocytes and macrophages is dependent on the presence of cystatin. In addition, the Mf-induced expression of the regulatory surface markers PD-L1 and PD-L2 in human monocytes, but not in macrophages, is dependent on cystatin. While Mf-treated monocytes result in decreased CD4+ T-cell proliferation in a co-culture assay, stimulation of T-cells with human monocytes treated with cystatin-depleted Mf lead to a restoration of CD4+ T-cell proliferation. Moreover, IL-10 induction by cystatin within Mf was dependent on p38 and ERK in macrophages, but independent of the ERK pathway in monocytes. These findings indicate that filarial nematodes differentially trigger and exploit various signaling pathways to induce immunomodulation in different myeloid cell subsets.
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Affiliation(s)
- Gopinath Venugopal
- Institute of Immunology, Centre for Infection Medicine, Freie Universität Berlin, Berlin, Germany
| | - Marion Mueller
- Institute of Immunology, Centre for Infection Medicine, Freie Universität Berlin, Berlin, Germany
| | - Susanne Hartmann
- Institute of Immunology, Centre for Infection Medicine, Freie Universität Berlin, Berlin, Germany
- * E-mail:
| | - Svenja Steinfelder
- Institute of Immunology, Centre for Infection Medicine, Freie Universität Berlin, Berlin, Germany
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6
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Ahmed N, French T, Rausch S, Kühl A, Hemminger K, Dunay IR, Steinfelder S, Hartmann S. Toxoplasma Co-infection Prevents Th2 Differentiation and Leads to a Helminth-Specific Th1 Response. Front Cell Infect Microbiol 2017; 7:341. [PMID: 28791259 PMCID: PMC5524676 DOI: 10.3389/fcimb.2017.00341] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [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: 07/11/2017] [Indexed: 01/06/2023] Open
Abstract
Nematode infections, in particular gastrointestinal nematodes, are widespread and co-infections with other parasites and pathogens are frequently encountered in humans and animals. To decipher the immunological effects of a widespread protozoan infection on the anti-helminth immune response we studied a co-infection with the enteric nematode Heligmosomoides polygyrus in mice previously infected with Toxoplasma gondii. Protective immune responses against nematodes are dependent on parasite-specific Th2 responses associated with IL-4, IL-5, IL-13, IgE, and IgG1 antibodies. In contrast, Toxoplasma gondii infection elicits a strong and protective Th1 immune response characterized by IFN-γ, IL-12, and IgG2a antibodies. Co-infected animals displayed significantly higher worm fecundity although worm burden remained unchanged. In line with this, the Th2 response to H. polygyrus in co-infected animals showed a profound reduction of IL-4, IL-5, IL-13, and GATA-3 expressing T cells. Co-infection also resulted in the lack of eosinophilia and reduced expression of the Th2 effector molecule RELM-β in intestinal tissue. In contrast, the Th1 response to the protozoan parasite was not diminished and parasitemia of T. gondii was unaffected by concurrent helminth infection. Importantly, H. polygyrus specific restimulation of splenocytes revealed H. polygyrus-reactive CD4+ T cells that produce a significant amount of IFN-γ in co-infected animals. This was not observed in animals infected with the nematode alone. Increased levels of H. polygyrus-specific IgG2a antibodies in co-infected mice mirrored this finding. This study suggests that polarization rather than priming of naive CD4+ T cells is disturbed in mice previously infected with T. gondii. In conclusion, a previous T. gondii infection limits a helminth-specific Th2 immune response while promoting a shift toward a Th1-type immune response.
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Affiliation(s)
- Norus Ahmed
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität BerlinBerlin, Germany
| | - Timothy French
- Institute of Inflammation and Neurodegeneration, Otto-von-Guericke UniversityMagdeburg, Germany
| | - Sebastian Rausch
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität BerlinBerlin, Germany
| | - Anja Kühl
- Division of Gastroenterology, Medical Department, Infection and Rheumatology, Research Center ImmunoSciencesBerlin, Germany
| | - Katrin Hemminger
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität BerlinBerlin, Germany
| | - Ildiko R Dunay
- Institute of Inflammation and Neurodegeneration, Otto-von-Guericke UniversityMagdeburg, Germany
| | - Svenja Steinfelder
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität BerlinBerlin, Germany
| | - Susanne Hartmann
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität BerlinBerlin, Germany
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7
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Ebner F, Schwiertz P, Steinfelder S, Pieper R, Zentek J, Schütze N, Baums CG, Alber G, Geldhof P, Hartmann S. Pathogen-Reactive T Helper Cell Analysis in the Pig. Front Immunol 2017; 8:565. [PMID: 28567041 PMCID: PMC5434156 DOI: 10.3389/fimmu.2017.00565] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 04/27/2017] [Indexed: 11/29/2022] Open
Abstract
There is growing interest in studying host–pathogen interactions in human-relevant large animal models such as the pig. Despite the progress in developing immunological reagents for porcine T cell research, there is an urgent need to directly assess pathogen-specific T cells—an extremely rare population of cells, but of upmost importance in orchestrating the host immune response to a given pathogen. Here, we established that the activation marker CD154 (CD40L), known from human and mouse studies, identifies also porcine antigen-reactive CD4+ T lymphocytes. CD154 expression was upregulated early after antigen encounter and CD4+CD154+ antigen-reactive T cells coexpressed cytokines. Antigen-induced expansion and autologous restimulation enabled a time- and dose-resolved analysis of CD154 regulation and a significantly increased resolution in phenotypic profiling of antigen-responsive cells. CD154 expression identified T cells responding to staphylococcal Enterotoxin B superantigen stimulation as well as T cells responding to the fungus Candida albicans and T cells specific for a highly prevalent intestinal parasite, the nematode Ascaris suum during acute and trickle infection. Antigen-reactive T cells were further detected after immunization of pigs with a single recombinant bacterial antigen of Streptococcus suis only. Thus, our study offers new ways to study antigen-specific T lymphocytes in the pig and their contribution to host–pathogen interactions.
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Affiliation(s)
- Friederike Ebner
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Patrycja Schwiertz
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Svenja Steinfelder
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Robert Pieper
- Department of Veterinary Medicine, Institute of Animal Nutrition, Freie Universität Berlin, Berlin, Germany
| | - Jürgen Zentek
- Department of Veterinary Medicine, Institute of Animal Nutrition, Freie Universität Berlin, Berlin, Germany
| | - Nicole Schütze
- Faculty of Veterinary Medicine, Institute of Immunology, Centre for Infectious Diseases, University of Leipzig, Leipzig, Germany
| | - Christoph G Baums
- Faculty of Veterinary Medicine, Institute for Bacteriology and Mycology, Centre for Infectious Diseases, University of Leipzig, Leipzig, Germany
| | - Gottfried Alber
- Faculty of Veterinary Medicine, Institute of Immunology, Centre for Infectious Diseases, University of Leipzig, Leipzig, Germany
| | - Peter Geldhof
- Laboratory of Parasitology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Susanne Hartmann
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
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8
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Strandmark J, Steinfelder S, Berek C, Kühl AA, Rausch S, Hartmann S. Eosinophils are required to suppress Th2 responses in Peyer's patches during intestinal infection by nematodes. Mucosal Immunol 2017; 10:661-672. [PMID: 27805618 DOI: 10.1038/mi.2016.93] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Accepted: 09/14/2016] [Indexed: 02/04/2023]
Abstract
Infections with enteric nematodes result in systemic type 2 helper T (Th2) responses, expansion of immunoglobulin (Ig)G1 antibodies, and eosinophilia. Eosinophils have a supportive role in mucosal Th2 induction during airway hyperreactivity. Whether eosinophils affect the local T-cell and antibody response in the gut-associated lymphoid tissue during enteric infections is unknown. We infected eosinophil-deficient ΔdblGATA-1 mice with the Th2-inducing small intestinal nematode Heligmosomoides polygyrus and found that parasite fecundity was decreased in the absence of eosinophils. A lack of eosinophils resulted in significantly augmented expression of GATA-3 and IL-4 by CD4+ T cells during acute infection, a finding strictly limited to Peyer's patches (PP). The increase in IL-4-producing cells in ΔdblGATA-1 mice was particularly evident within the CXCR5+PD-1+ T-follicular helper cell population and was associated with a switch of germinal centre B cells to IgG1 production and elevated serum IgG1 levels. In contrast, infected wild-type mice had a modest IgG1 response in the PP, whereas successfully maintaining a population of IgA+ germinal center B cells. Our results suggest a novel role for eosinophils during intestinal infection whereby they restrict IL-4 responses by follicular T helper cells and IgG1 class switching in the PP to ensure maintenance of local IgA production.
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Affiliation(s)
- J Strandmark
- Institute of Immunology, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - S Steinfelder
- Institute of Immunology, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - C Berek
- Deutsches Rheuma Forschungszentrum Berlin, a Leibniz Institute, Berlin, Germany
| | - A A Kühl
- Department of Internal Medicine, Rheumatology and Clinical Immunology/Research Center ImmunoSciences (RCIS), Charité-University Medicine Berlin, Berlin, Germany
| | - S Rausch
- Institute of Immunology, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - S Hartmann
- Institute of Immunology, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
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9
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Steinfelder S, Rausch S, Michael D, Kühl AA, Hartmann S. Intestinal helminth infection induces highly functional resident memory CD4 + T cells in mice. Eur J Immunol 2016; 47:353-363. [PMID: 27861815 DOI: 10.1002/eji.201646575] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 10/24/2016] [Accepted: 11/07/2016] [Indexed: 12/17/2022]
Abstract
Immunity to intestinal nematodes requires CD4⁺ Th2-cell responses, including IL-4 and IL-13 production. Chronic infection with intestinal nematodes leads to downregulation of these responses, and few functional T helper (Th) 2 cells are detected in secondary lymphoid organs in the chronic phase or after abrogation of infection. Here, we show with a natural murine infection with Heligmosomoides polygyrus that highly functional memory Th2 cells persist in the lamina propria and in addition in the peritoneal cavity (PC) after abrogation of infection. While both tissue-resident memory (TRM ) populations proliferate in situ and express IL-4, IL-5, and IL-13 upon TCR-dependent stimulation, only peritoneal memory cells express high levels of the IL-33 receptor and produce IL-5 and IL-13 upon TCR-independent stimulation with IL-33 and IL-7. Most importantly, PC-derived TRM cells are able to mediate anti-helminthic effects by decreasing the fecundity of female worms upon transfer into recipient mice. These results show that nonlymphoid compartments can serve as reservoirs for Th2 memory cells, and furthermore that innate effector function of Th2 memory cells is restricted to CD4⁺ memory T cells residing in the PC.
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Affiliation(s)
- Svenja Steinfelder
- Veterinary Medicine, Center for Infection Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Sebastian Rausch
- Veterinary Medicine, Center for Infection Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Dörte Michael
- Veterinary Medicine, Center for Infection Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Anja A Kühl
- Charité, Campus Benjamin Franklin, Institute of Pathology/RCIS, Berlin, Germany
| | - Susanne Hartmann
- Veterinary Medicine, Center for Infection Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
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10
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Abstract
Intracellular single-celled parasites belonging to the large phylum Apicomplexa are amongst the most prevalent and morbidity-causing pathogens worldwide. In this review, we highlight a few of the many recent advances in the field that helped to clarify some important aspects of their fascinating biology and interaction with their hosts.
Plasmodium falciparum causes malaria, and thus the recent emergence of resistance against the currently used drug combinations based on artemisinin has been of major interest for the scientific community. It resulted in great advances in understanding the resistance mechanisms that can hopefully be translated into altered future drug regimens. Apicomplexa are also experts in host cell manipulation and immune evasion.
Toxoplasma gondii and
Theileria sp., besides
Plasmodium sp., are species that secrete effector molecules into the host cell to reach this aim. The underlying molecular mechanisms for how these proteins are trafficked to the host cytosol (
T. gondii and
Plasmodium) and how a secreted protein can immortalize the host cell (
Theileria sp.) have been illuminated recently. Moreover, how such secreted proteins affect the host innate immune responses against
T. gondii and the liver stages of
Plasmodium has also been unraveled at the genetic and molecular level, leading to unexpected insights. Methodological advances in metabolomics and molecular biology have been instrumental to solving some fundamental puzzles of mitochondrial carbon metabolism in Apicomplexa. Also, for the first time, the generation of stably transfected
Cryptosporidium parasites was achieved, which opens up a wide variety of experimental possibilities for this understudied, important apicomplexan pathogen.
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Affiliation(s)
- Frank Seeber
- FG16: Mycotic and parasitic agents and mycobacteria, Robert Koch-Institute, Berlin, Germany
| | - Svenja Steinfelder
- Institute of Immunology, Center of Infection Medicine, Free University Berlin, Berlin, Germany
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Abstract
Helminths have evolved numerous pathways to prevent their expulsion or elimination from the host to ensure long-term survival. During infection, they target numerous host cells, including macrophages, to induce an alternatively activated phenotype, which aids elimination of infection, tissue repair, and wound healing. Multiple animal-based studies have demonstrated a significant reduction or complete reversal of disease by helminth infection, treatment with helminth products, or helminth-modulated macrophages in models of allergy, autoimmunity, and sepsis. Experimental studies of macrophage and helminth therapies are being translated into clinical benefits for patients undergoing transplantation and those with multiple sclerosis. Thus, helminths or helminth-modulated macrophages present great possibilities as therapeutic applications for inflammatory diseases in humans. Macrophage-based helminth therapies and the underlying mechanisms of their therapeutic or curative effects represent an under-researched area with the potential to open new avenues of treatment. This review explores the application of helminth-modulated macrophages as a new therapy for inflammatory diseases.
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Affiliation(s)
- Svenja Steinfelder
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Noëlle Louise O’Regan
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
| | - Susanne Hartmann
- Department of Veterinary Medicine, Institute of Immunology, Freie Universität Berlin, Berlin, Germany
- * E-mail:
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12
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Ziegler T, Rausch S, Steinfelder S, Klotz C, Hepworth MR, Kühl AA, Burda PC, Lucius R, Hartmann S. A Novel Regulatory Macrophage Induced by a Helminth Molecule Instructs IL-10 in CD4+ T Cells and Protects against Mucosal Inflammation. J I 2015; 194:1555-64. [DOI: 10.4049/jimmunol.1401217] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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13
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O'Regan NL, Steinfelder S, Schwedler C, Rao GB, Srikantam A, Blanchard V, Hartmann S. Filariasis asymptomatically infected donors have lower levels of disialylated IgG compared to endemic normals. Parasite Immunol 2014; 36:713-20. [DOI: 10.1111/pim.12137] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 08/07/2014] [Indexed: 12/12/2022]
Affiliation(s)
- N. L. O'Regan
- Institute of Immunology; Center for Infection Medicine; Freie Universität Berlin; Berlin Germany
| | - S. Steinfelder
- Institute of Immunology; Center for Infection Medicine; Freie Universität Berlin; Berlin Germany
| | - C. Schwedler
- Clinical Chemistry and Pathobiochemistry; Institute of Laboratory Medicine; Charité Medical University; Berlin Germany
| | - G. B. Rao
- Blue Peter Public Health and Research Centre-LEPRA Society; Hyderabad Andhra Pradesh India
| | - A. Srikantam
- Blue Peter Public Health and Research Centre-LEPRA Society; Hyderabad Andhra Pradesh India
| | - V. Blanchard
- Clinical Chemistry and Pathobiochemistry; Institute of Laboratory Medicine; Charité Medical University; Berlin Germany
| | - S. Hartmann
- Institute of Immunology; Center for Infection Medicine; Freie Universität Berlin; Berlin Germany
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14
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O'Regan NL, Steinfelder S, Venugopal G, Rao GB, Lucius R, Srikantam A, Hartmann S. Brugia malayi microfilariae induce a regulatory monocyte/macrophage phenotype that suppresses innate and adaptive immune responses. PLoS Negl Trop Dis 2014; 8:e3206. [PMID: 25275395 PMCID: PMC4183501 DOI: 10.1371/journal.pntd.0003206] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [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: 05/02/2014] [Accepted: 08/21/2014] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Monocytes and macrophages contribute to the dysfunction of immune responses in human filariasis. During patent infection monocytes encounter microfilariae in the blood, an event that occurs in asymptomatically infected filariasis patients that are immunologically hyporeactive. AIM To determine whether blood microfilariae directly act on blood monocytes and in vitro generated macrophages to induce a regulatory phenotype that interferes with innate and adaptive responses. METHODOLOGY AND PRINCIPAL FINDINGS Monocytes and in vitro generated macrophages from filaria non-endemic normal donors were stimulated in vitro with Brugia malayi microfilarial (Mf) lysate. We could show that monocytes stimulated with Mf lysate develop a defined regulatory phenotype, characterised by expression of the immunoregulatory markers IL-10 and PD-L1. Significantly, this regulatory phenotype was recapitulated in monocytes from Wuchereria bancrofti asymptomatically infected patients but not patients with pathology or endemic normals. Monocytes from non-endemic donors stimulated with Mf lysate directly inhibited CD4+ T cell proliferation and cytokine production (IFN-γ, IL-13 and IL-10). IFN-γ responses were restored by neutralising IL-10 or PD-1. Furthermore, macrophages stimulated with Mf lysate expressed high levels of IL-10 and had suppressed phagocytic abilities. Finally Mf lysate applied during the differentiation of macrophages in vitro interfered with macrophage abilities to respond to subsequent LPS stimulation in a selective manner. CONCLUSIONS AND SIGNIFICANCE Conclusively, our study demonstrates that Mf lysate stimulation of monocytes from healthy donors in vitro induces a regulatory phenotype, characterized by expression of PD-L1 and IL-10. This phenotype is directly reflected in monocytes from filarial patients with asymptomatic infection but not patients with pathology or endemic normals. We suggest that suppression of T cell functions typically seen in lymphatic filariasis is caused by microfilaria-modulated monocytes in an IL-10-dependent manner. Together with suppression of macrophage innate responses, this may contribute to the overall down-regulation of immune responses observed in asymptomatically infected patients.
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Affiliation(s)
- Noëlle Louise O'Regan
- Freie Universität Berlin, Center for Infection Medicine, Institute of Immunology, Berlin, Germany
| | - Svenja Steinfelder
- Freie Universität Berlin, Center for Infection Medicine, Institute of Immunology, Berlin, Germany
| | - Gopinath Venugopal
- Freie Universität Berlin, Center for Infection Medicine, Institute of Immunology, Berlin, Germany
| | - Gopala B. Rao
- Blue Peter Public Health and Research Centre-LEPRA Society, Hyderabad, Andhra Pradesh, India
| | - Richard Lucius
- Humboldt Universität Berlin, Department of Biology, Molecular Parasitology, Berlin, Germany
| | - Aparna Srikantam
- Blue Peter Public Health and Research Centre-LEPRA Society, Hyderabad, Andhra Pradesh, India
| | - Susanne Hartmann
- Freie Universität Berlin, Center for Infection Medicine, Institute of Immunology, Berlin, Germany
- * E-mail:
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15
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Kastirr I, Maglie S, Paroni M, Alfen JS, Nizzoli G, Sugliano E, Crosti MC, Moro M, Steckel B, Steinfelder S, Stölzel K, Romagnani C, Botti F, Caprioli F, Pagani M, Abrignani S, Geginat J. IL-21 Is a Central Memory T Cell–Associated Cytokine That Inhibits the Generation of Pathogenic Th1/17 Effector Cells. J I 2014; 193:3322-31. [DOI: 10.4049/jimmunol.1400775] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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16
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Daniłowicz-Luebert E, Steinfelder S, Kühl AA, Drozdenko G, Lucius R, Worm M, Hamelmann E, Hartmann S. A nematode immunomodulator suppresses grass pollen-specific allergic responses by controlling excessive Th2 inflammation. Int J Parasitol 2013; 43:201-10. [DOI: 10.1016/j.ijpara.2012.10.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 10/18/2012] [Accepted: 10/24/2012] [Indexed: 11/16/2022]
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17
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Rivino L, Gruarin P, Häringer B, Steinfelder S, Lozza L, Steckel B, Weick A, Sugliano E, Jarrossay D, Kühl AA, Loddenkemper C, Abrignani S, Sallusto F, Lanzavecchia A, Geginat J. CCR6 is expressed on an IL-10-producing, autoreactive memory T cell population with context-dependent regulatory function. ACTA ACUST UNITED AC 2010; 207:565-77. [PMID: 20194631 PMCID: PMC2839148 DOI: 10.1084/jem.20091021] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Interleukin (IL)-10 produced by regulatory T cell subsets is important for the prevention of autoimmunity and immunopathology, but little is known about the phenotype and function of IL-10–producing memory T cells. Human CD4+CCR6+ memory T cells contained comparable numbers of IL-17– and IL-10–producing cells, and CCR6 was induced under both Th17-promoting conditions and upon tolerogenic T cell priming with transforming growth factor (TGF)–β. In normal human spleens, the majority of CCR6+ memory T cells were in the close vicinity of CCR6+ myeloid dendritic cells (mDCs), and strikingly, some of them were secreting IL-10 in situ. Furthermore, CCR6+ memory T cells produced suppressive IL-10 but not IL-2 upon stimulation with autologous immature mDCs ex vivo, and secreted IL-10 efficiently in response to suboptimal T cell receptor (TCR) stimulation with anti-CD3 antibodies. However, optimal TCR stimulation of CCR6+ T cells induced expression of IL-2, interferon-γ, CCL20, and CD40L, and autoreactive CCR6+ T cell lines responded to various recall antigens. Notably, we isolated autoreactive CCR6+ T cell clones with context-dependent behavior that produced IL-10 with autologous mDCs alone, but that secreted IL-2 and proliferated upon stimulation with tetanus toxoid. We propose the novel concept that a population of memory T cells, which is fully equipped to participate in secondary immune responses upon recognition of a relevant recall antigen, contributes to the maintenance of tolerance under steady-state conditions.
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Affiliation(s)
- Laura Rivino
- Institute for Research in Biomedicine, Bellinzona, Switzerland
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18
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Pogonka T, Schelzke K, Stange J, Papadakis K, Steinfelder S, Liesenfeld O, Lucius R. CD8+ cells protect mice against reinfection with the intestinal parasite Eimeria falciformis. Microbes Infect 2010; 12:218-26. [DOI: 10.1016/j.micinf.2009.12.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Revised: 11/20/2009] [Accepted: 12/11/2009] [Indexed: 10/20/2022]
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Steinfelder S, Andersen JF, Cannons JL, Feng CG, Joshi M, Dwyer D, Caspar P, Schwartzberg PL, Sher A, Jankovic D. The major component in schistosome eggs responsible for conditioning dendritic cells for Th2 polarization is a T2 ribonuclease (omega-1). ACTA ACUST UNITED AC 2009; 206:1681-90. [PMID: 19635859 PMCID: PMC2722182 DOI: 10.1084/jem.20082462] [Citation(s) in RCA: 234] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Schistosoma mansoni eggs contain factors that trigger potent Th2 responses in vivo and condition mouse dendritic cells (DCs) to promote Th2 lymphocyte differentiation. Using an in vitro bystander polarization assay as the readout, we purified and identified the major Th2-inducing component from soluble egg extract (SEA) as the secreted T2 ribonuclease, omega-1. The Th2-promoting activity of omega-1 was found to be sensitive to ribonuclease inhibition and did not require MyD88/TRIF signaling in DCs. In common with unfractioned SEA, the purified native protein suppresses lipopolysaccharide-induced DC activation, but unlike SEA, it fails to trigger interleukin 4 production from basophils. Importantly, omega-1-exposed DCs displayed pronounced cytoskeletal changes and exhibited decreased antigen-dependent conjugate formation with CD4(+) T cells. Based on this evidence, we hypothesize that S. mansoni omega-1 acts by limiting the interaction of DCs with CD4(+) T lymphocytes, thereby lowering the strength of the activation signal delivered.
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Affiliation(s)
- Svenja Steinfelder
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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20
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Jankovic D, Andersen J, Steinfelder S, Cannons JL, Schwartzberg PL, Sher A. The major Th2 polarizing component in schistosome eggs is a T2 ribonuclease (omega-1) that inhibits dendritic-T cell interaction (133.23). The Journal of Immunology 2009. [DOI: 10.4049/jimmunol.182.supp.133.23] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Although helminth parasites are the most potent infectious stimuli for the induction of Th2 cells, the identity of their Th2-inducing components has remained elusive. Schistosoma mansoni eggs contain factors that trigger potent Th2 responses in vivo and condition murine dendritic cells (DC) to promote Th2 lymphocyte differentiation. We have performed a classical biochemical purification of the DC-dependent Th2-polarizing molecule(s) in both secreted egg products and in a water-soluble egg extract (SEA) and identified the active Th2-inducing component as a 31 kDa molecule identical to the previously described S. mansoni ribonuclease T2, omega-1. The Th2-promoting activity of this glycoprotein is sensitive to ribonuclease inhibition and does not require MyD88 or TRIF signaling in DC. In common with unfractioned SEA the purified native protein suppresses LPS-induced DC activation, but unlike SEA fails to trigger IL-4 production from basophils. We further demonstrate that SEA as well as purified omega-1 directly affect both DC morphology and the ability of these APC to interact physically with CD4 T lymphocytes. Based on this evidence, we propose that SEA and its omega-1 bioactive component promote Th2 polarization by lowering the strength of the activation signal delivered by DC.
This work was supported by the Intramural Research Program of the NIAID.
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Jankovic D, Steinfelder S, Andersen JF, Sher A. Helminth secretory product Ribonuclease T2 is a Th2-inducing agent (43.8). The Journal of Immunology 2007. [DOI: 10.4049/jimmunol.178.supp.43.8] [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] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Helminth-induced Th2 polarization is associated with down-regulated dendritic cell (DC) function but the underlying molecular mechanism remains elusive due to the poor characterization of helminth molecules with Th2-inducing activity. During Schistosoma mansoni infection egg, but not worm, Ag are a target of a strong Th2 response. Moreover, when injected in naïve mice schistosome eggs or water-soluble egg extract (SEA) have an intrinsic ability to promote development of Th2 cells. Using as a read-out an in vitro model of CD4+ T cell priming with CD11c+ splenic DC we demonstrated that SEA fractions containing molecule(s) with an approximate MW of 30 kD selectively promote Th2 polarization and down-regulate DC functions. Moreover, similar positive fractions were isolated from preparations containing egg excretory/secretory molecules. The N-terminal sequence of the latter identified the S. mansoni enzyme Ribonuclease T2 as the active component and this was further confirmed with the recombinant protein. S. mansoni ribonuclease is the first chemically defined protein with Th2-promoting activity known to act on dendritic cells.
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Affiliation(s)
- Dragana Jankovic
- 1Laboratory of Parasitic Diseases, NIAID, NIH, Bethesda, Maryland, 20892,
| | - Svenja Steinfelder
- 1Laboratory of Parasitic Diseases, NIAID, NIH, Bethesda, Maryland, 20892,
| | - John F. Andersen
- 2Laboratory of Malaria and Vector Research, NIAID, NIH, Bethesda, Maryland, 20892
| | - Alan Sher
- 1Laboratory of Parasitic Diseases, NIAID, NIH, Bethesda, Maryland, 20892,
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Jankovic D, Steinfelder S, Kullberg MC, Sher A. Mechanisms underlying helminth- induced Th2 polarization: default, negative or positive pathways? Chem Immunol Allergy 2006; 90:65-81. [PMID: 16210903 DOI: 10.1159/000088881] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Since the initial description of Th1 and Th2 subsets in the 1980s, there has been enormous progress in identifying the molecular events and the transcriptional factors that regulate Th differentiation in response to a specific stimulus (e.g. antigen dose, co-receptors, cytokines). Although TCR cross-linking and engagement of co-stimulatory molecules are necessary for activation of CD4+ lymphocytes, these two events do not appear in themselves to explain Th1/Th2 commitment. Among pathogens, helminths are the main examples of Th2-cell inducers in both humans and experimental models. This review will focus on our recent findings on the requirements for Th2 polarization by the parasitic trematode Schistosoma mansoni. In particular, we will address the ongoing controversy as to whether Th2 development depends on positive vs. negative vs. the absence of signals from antigen-presenting cells. In addition, we will discuss the similarities between the pathways involved in parasite- and allergen-induced Th2 differentiation.
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Affiliation(s)
- Dragana Jankovic
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md., USA
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23
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Steinfelder S, Lucius R, Greif G, Pogonka T. Treatment of mice with the anticoccidial drug Toltrazuril does not interfere with the development of a specific cellular intestinal immune response to Eimeria falciformis. Parasitol Res 2005; 97:458-65. [PMID: 16163562 DOI: 10.1007/s00436-005-1464-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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: 06/27/2005] [Accepted: 07/05/2005] [Indexed: 11/24/2022]
Abstract
Immunity against Eimeria-infections is highly specific and it depends on cell-mediated effector mechanisms. Infections of BALB/c mice with 1,000 sporulated oocysts of Eimeria falciformis led to protection against challenge infections. Treatment with the anti-coccidium Toltrazuril, during primary infection, terminated the ongoing disease and did not interfere with the establishment of protective immunity against challenge infections. Mesenteric lymph node cells of infected, treated as well as non-treated and challenged BALB/c mice, showed a similar proliferation upon stimulation with parasite antigen. In contrast, neither cells of the Peyer's patches, intraepithelial lymphocytes, nor spleen cells responded to stimulation with parasite antigens. Cells from all compartments and of all investigated groups proliferated and released the cytokines IFN-gamma and IL-4 in response to the mitogen Concanavalin A. The number of cells releasing IFN-gamma or IL-4 was not dependent on the status of infection or previous treatment with Toltrazuril. The serum IgG response against total sporozoite antigens of individual mice showed that in addition, a systemic humoral response developed in infected mice, independent of a previous drug treatment, although the specific IgG antibody concentration was higher in non-treated mice. Thus, Toltrazuril does not impair the parasite specific intestinal cellular and systemic antibody response and does not prevent the development of protection against challenge infection.
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Affiliation(s)
- Svenja Steinfelder
- Department of Molecular Parasitology, Humboldt University, Philippstrasse 13, 10115 Berlin, Germany
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