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Sunderraj A, Cunha LM, Avila M, Alexandria S, Ferreira AM, de Oliveira-da Silva LC, Ribeiro ALP, Nunes MDCP, Sabino EC, Landay A, Kalil J, Chevillard C, Cunha-Neto E, Feinstein MJ. Parasite DNA and Markers of Decreased Immune Activation Associate Prospectively with Cardiac Functional Decline over 10 Years among Trypanosoma cruzi Seropositive Individuals in Brazil. Int J Mol Sci 2023; 25:44. [PMID: 38203212 PMCID: PMC10779141 DOI: 10.3390/ijms25010044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/27/2023] [Accepted: 12/12/2023] [Indexed: 01/12/2024] Open
Abstract
Parasitemia and inflammatory markers are cross-sectionally associated with chronic Chagas cardiomyopathy (CCC) among patients with Trypanosoma cruzi. However, the prospective association of the parasite load and host immune response-related characteristics with CCC (that is, progressors) among T. cruzi seropositive individuals has only been partially defined. In a cohort of T. cruzi seropositive patients in Montes Claros and São Paulo, Brazil who were followed over 10 years, we identified the association of a baseline T. cruzi parasite load and systemic markers of inflammation with a decline in cardiac function and/or the presence of cardiac congestion 10 years later. The progressors (n = 21) were individuals with a significant decline in the left ventricular ejection fraction and/or elevated markers of cardiac congestion after 10 years. The controls (n = 31) had normal markers of cardiac function and congestion at the baseline and at the follow-up. They were matched with the progressors on age, sex, and genetic ancestry. The progressors had higher mean parasite loads at the baseline than the controls (18.3 vs. 0.605 DNA parasite equivalents/20 mL, p < 0.05). Of the 384 inflammation-related proteins analyzed, 47 differed significantly at a false discovery rate- (FDR-) corrected p < 0.05 between the groups. There were 44 of these 47 proteins that were significantly higher in the controls compared to in the progressors, including the immune activation markers CCL21, CXCL12, and HCLS1 and several of the tumor necrosis factor superfamily of proteins. Among the individuals who were seropositive for T. cruzi at the baseline and who were followed over 10 years, those with incident CCC at the 10-year marker had a comparatively higher baseline of T. cruzi parasitemia and lower baseline markers of immune activation and chemotaxis. These findings generate the hypothesis that the early impairment of pathogen-killing immune responses predisposes individuals to CCC, which merits further study.
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Affiliation(s)
- Ashwin Sunderraj
- Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Luisa Marin Cunha
- Faculdade de Ciências Médicas de Santos, UNILUS, Santos 11045-101, Brazil
| | - Matheus Avila
- Faculdade de Ciências Médicas de Santos, UNILUS, Santos 11045-101, Brazil
| | - Shaina Alexandria
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Ariela Mota Ferreira
- Graduate Program in Health Sciences, State University of Montes Claros, Montes Claros 39401-089, Brazil;
| | | | - Antonio L. P. Ribeiro
- Department of Internal Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil; (A.L.P.R.); (M.d.C.P.N.)
| | - Maria do Carmo Pereira Nunes
- Department of Internal Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil; (A.L.P.R.); (M.d.C.P.N.)
| | - Ester C. Sabino
- Institute of Tropical Medicine, University of São Paulo, São Paulo 05403-000, Brazil; (L.C.d.O.-d.S.)
| | - Alan Landay
- Division of Geriatrics and Gerontology, Department of Medicine, Rush University Medical Center, Chicago, IL 60612, USA
| | - Jorge Kalil
- Laboratory of Immunology, Heart Institute Instituto do Coração (InCor), School of Medicine, University of São Paulo, São Paulo 05403-000, Brazil;
| | - Christophe Chevillard
- Institut MarMaRa, TAGC Theories and Approaches of Genomic Complexity, Aix Marseille Université, 13385 Marseille, France;
| | - Edecio Cunha-Neto
- Laboratory of Immunology, Heart Institute Instituto do Coração (InCor), School of Medicine, University of São Paulo, São Paulo 05403-000, Brazil;
| | - Matthew J. Feinstein
- Division of Cardiology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
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2
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Ikeogu N, Olayinka-Adefemi F, Edechi C, Onyilagha C, Jia P, Marshall A, Ode J, Uzonna J. Crosspteryx fibrifuga leaf extract enhances host resistance to Trypanosoma congolense infection in mice by regulating host immune response and disrupting the activity of parasite superoxide dismutase enzyme. Front Microbiol 2023; 14:1275365. [PMID: 37954253 PMCID: PMC10635443 DOI: 10.3389/fmicb.2023.1275365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 10/13/2023] [Indexed: 11/14/2023] Open
Abstract
African trypanosomiasis, a neglected tropical disease, is caused by diverse species of the protozoan parasite belonging to the genus Trypanosoma. Although anti-trypanosomal medications exist, the increase in drug resistance and persistent antigenic variation has necessitated the development of newer and more efficacious therapeutic agents which are selectively toxic to the parasite. In this study, we assessed the trypanocidal efficacy of Crosspteryx fibrifuga leaf extract (C.f/L-extract) in vitro. Following treatment of T. congolense parasites with C.f/L-extract, we observed a significant decrease in parasite number and an elevation in the expression of the apoptotic markers, Annexin V and 7-Aminoactinomycin D (7AAD). Interestingly, at the same concentration (50 μg/mL), C.f/L-extract was not cytotoxic to murine whole splenocytes. We also observed a significant increase in pro-inflammatory cytokines and nitric oxide secretion by bone marrow derived macrophages following treatment with C.f/L-extract (10 μg/mL and 50 μg/mL) compared to PBS treated controls, suggesting that the extract possesses an immune regulatory effect. Treatment of T. congolense infected mice with C.f/L-extract led to significant decrease in parasite numbers and a modest increase in mouse survival compared to PBS treated controls. In addition, there was a significant increase in CD4+IFN-γ+ T cells and a decrease in CD4+IL-10+ T cells in the spleens of T. congolense infected mice treated with C.f/L-extract. Interestingly, C.f/L-extract treatment decreased the activity of superoxide dismutase (an enzyme that protects unicellular organisms from oxidative stress) in T. congolense parasites but not in splenocytes. Collectively, our study has identified C.f/L-extract as a potential anti-trypanosomal agent that warrant further investigation and possibly explored as a treatment option for T. congolense infection.
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Affiliation(s)
- Nnamdi Ikeogu
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | | | - Chidalu Edechi
- Department of Pathology, University of Manitoba, Winnipeg, MB, Canada
| | - Chukwunonso Onyilagha
- National Centre for Foreign Animal Disease, Canadian Food Inspection Agency, Winnipeg, MB, Canada
| | - Ping Jia
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - Aaron Marshall
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - Julius Ode
- Department of Veterinary Pharmacology and Toxicology, University of Abuja, Abuja, Nigeria
| | - Jude Uzonna
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
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3
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Jones KM, Poveda C, Versteeg L, Bottazzi ME, Hotez PJ. Preclinical advances and the immunophysiology of a new therapeutic chagas disease vaccine. Expert Rev Vaccines 2022; 21:1185-1203. [PMID: 35735065 DOI: 10.1080/14760584.2022.2093721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Chronic infection with the protozoal parasite Trypanosoma cruzi leads to a progressive cardiac disease, known as chronic Chagasic cardiomyopathy (CCC). A new therapeutic Chagas disease vaccine is in development to augment existing antiparasitic chemotherapy drugs. AREAS COVERED We report on our current understanding of the underlying immunologic and physiologic mechanisms that lead to CCC, including parasite immune escape mechanisms that allow persistence and the subsequent inflammatory and fibrotic processes that lead to clinical disease. We report on vaccine design and the observed immunotherapeutic effects including induction of a balanced TH1/TH2/TH17 immune response that leads to reduced parasite burdens and tissue pathology. Further, we report vaccine-linked chemotherapy, a dose sparing strategy to further reduce parasite burdens and tissue pathology. EXPERT OPINION Our vaccine-linked chemotherapeutic approach is a multimodal treatment strategy, addressing both the parasite persistence and the underlying deleterious host inflammatory and fibrotic responses that lead to cardiac dysfunction. In targeting treatment towards patients with chronic indeterminate or early determinate Chagas disease, this vaccine-linked chemotherapeutic approach will be highly economical and will reduce the global disease burden and deaths due to CCC.
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Affiliation(s)
- Kathryn M Jones
- Texas Children's Hospital Center for Vaccine Development, Department of Pediatrics, Division of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America.,Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Cristina Poveda
- Texas Children's Hospital Center for Vaccine Development, Department of Pediatrics, Division of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America.,Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Leroy Versteeg
- Texas Children's Hospital Center for Vaccine Development, Department of Pediatrics, Division of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America.,Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America.,Cell Biology and Immunology Group, Wageningen University & Research, De Elst 1, 6708 WD Wageningen, The Netherlands
| | - Maria Elena Bottazzi
- Texas Children's Hospital Center for Vaccine Development, Department of Pediatrics, Division of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America.,Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America.,Department of Biology, Baylor University, Waco, Texas, United States of America
| | - Peter J Hotez
- Texas Children's Hospital Center for Vaccine Development, Department of Pediatrics, Division of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America.,Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America.,Department of Biology, Baylor University, Waco, Texas, United States of America.,James A. Baker III Institute for Public Policy, Rice University, Houston, Texas, United States of America.,Hagler Institute for Advanced Study at Texas A&M University, College Station, Texas, United States of America
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Vieira RDS, Nascimento MS, Noronha IH, Vasconcelos JRC, Benvenuti LA, Barber GN, Câmara NOS, Kalil J, Cunha-Neto E, Almeida RR. STING Signaling Drives Production of Innate Cytokines, Generation of CD8 + T Cells and Enhanced Protection Against Trypanosoma cruzi Infection. Front Immunol 2022; 12:775346. [PMID: 35095849 PMCID: PMC8795786 DOI: 10.3389/fimmu.2021.775346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 12/16/2021] [Indexed: 12/22/2022] Open
Abstract
A variety of signaling pathways are involved in the induction of innate cytokines and CD8+ T cells, which are major players in protection against acute Trypanosoma cruzi infection. Previous data have demonstrated that a TBK-1/IRF3-dependent signaling pathway promotes IFN-β production in response to Trypanosoma cruzi, but the role for STING, a main interactor of these proteins, remained to be addressed. Here, we demonstrated that STING signaling is required for production of IFN-β, IL-6, and IL-12 in response to Trypanosoma cruzi infection and that STING absence negatively impacts activation of IRF-dependent pathways in response to the parasite. We reported no significant activation of IRF-dependent pathways and cytokine expression in RAW264.7 macrophages in response to heat-killed trypomastigotes. In addition, we showed that STING is essential for T. cruzi DNA-mediated induction of IFN-β, IL-6, and IL-12 gene expression in RAW264.7 macrophages. We demonstrated that STING-knockout mice have significantly higher parasitemia from days 5 to 8 of infection and higher heart parasitism at day 13 after infection. Although we observed similar heart inflammatory infiltrates at day 13 after infection, IFN-β, IL-12, CXCL9, IFN-γ, and perforin gene expression were lower in the absence of STING. We also showed an inverse correlation between parasite DNA and the expression of CXCL9, IFN-γ, and perforin genes in the hearts of infected animals at day 13 after infection. Finally, we reported that STING signaling is required for splenic IFN-β and IL-6 expression early after infection and that STING deficiency results in lower numbers of splenic parasite-specific IFN-γ and IFN-γ/perforin-producing CD8+ T cells, indicating a pivotal role for STING signaling in immunity to Trypanosoma cruzi.
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Affiliation(s)
- Raquel de Souza Vieira
- Laboratório de Imunologia, Instituto do Coração, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Marilda Savoia Nascimento
- Laboratório de Imunologia, Instituto do Coração, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Isaú Henrique Noronha
- Laboratório de Vacinas Recombinantes, Departamento de Biociências, Universidade Federal de São Paulo, Santos, Brazil
| | | | - Luiz Alberto Benvenuti
- Divisão de Patologia, Instituto do Coração (INCOR), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Glen N Barber
- Department of Cell Biology, University of Miami, Miami, FL, United States
| | - Niels Olsen Saraiva Câmara
- Laboratório de Imunologia Experimental e Clínica, Departamento de Clínica Médica, Faculdade de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil.,Laboratório de Imunologia de Transplantes, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Jorge Kalil
- Laboratório de Imunologia, Instituto do Coração, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Disciplina de Imunologia Clínica e Alergia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Instituto de Investigação em Imunologia (III), Instituto Nacional de Ciência e Tecnologia (INCT), São Paulo, Brazil
| | - Edecio Cunha-Neto
- Laboratório de Imunologia, Instituto do Coração, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Disciplina de Imunologia Clínica e Alergia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Instituto de Investigação em Imunologia (III), Instituto Nacional de Ciência e Tecnologia (INCT), São Paulo, Brazil
| | - Rafael Ribeiro Almeida
- Laboratório de Imunologia, Instituto do Coração, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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Zanluqui NG, Lovo-Martins MI, Malvezi AD, Panis C, da Silva RV, Tatakihara VLH, Felipe I, Martins-Pinge MC, Wowk PF, Pinge-Filho P. Concanavalin-A stimulates IL-17 and nitric oxide production and induces macrophage polarization and resistance to Trypanosoma cruzi infection. Life Sci 2020; 258:118137. [PMID: 32712299 DOI: 10.1016/j.lfs.2020.118137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/14/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022]
Abstract
AIMS Chagas disease is a neglected tropical disease. The ability of Trypanosoma cruzi to survive within phagocytes is likely a critical factor for T. cruzi dissemination in the host. For control of the parasite load and host survival, macrophage action is required. Concanavalin-A (Con-A) presents properties that modulate immune functions and protect hosts from several experimental infectious diseases. Here, we evaluated the effects of Con-A on peritoneal macrophages as well as on the course of experimental infection by T. cruzi. MAIN METHODS BALB/c mice, a susceptible model for T. cruzi infection, were treated with Con-A via the intraperitoneal route and 3 days later infected with T. cruzi. We quantified parasitemia, cytokines and nitric oxide (NO). Peritoneal exudate and macrophages were collected for macrophage phenotyping and cell viability, NO and cytokine detection, as well as for T. cruzi internalization and release index determination. KEY FINDINGS Con-A treatment induced IL-17a and NO production by cells from the peritoneal cavity, and M1 marker expression predominated on peritoneal macrophages. These cells are also more prone to producing TNF-α, IL-6 and NO when infected by T. cruzi and show high trypanocidal capacity. Due to a hostile peritoneal microenvironment caused by Con-A, which induces macrophage cNOS and iNOS expression, infected BALB/c mice showed reduced parasitemia and an increased survival rate. SIGNIFICANCE We conclude that Con-A can induce peritoneal M1 macrophage polarization to increase trypanocidal activity, resulting in ameliorated systemic infection in a susceptible experimental model.
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Affiliation(s)
- Nágela Ghabdan Zanluqui
- Instituto Carlos Chagas, Fiocruz-PR, Curitiba, Paraná, Brazil; Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Paraná, Brazil
| | - Maria Isabel Lovo-Martins
- Instituto Carlos Chagas, Fiocruz-PR, Curitiba, Paraná, Brazil; Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Paraná, Brazil
| | | | - Carolina Panis
- Laboratório de Mediadores Inflamatórios, Universidade Estadual do Oeste do Paraná, Francisco Beltrão, PR, Brazil
| | | | | | - Ionice Felipe
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Paraná, Brazil
| | | | | | - Phileno Pinge-Filho
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Paraná, Brazil.
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Gómez-Olarte S, Bolaños NI, Echeverry M, Rodríguez AN, Cuéllar A, Puerta CJ, Mariño A, González JM. Intermediate Monocytes and Cytokine Production Associated With Severe Forms of Chagas Disease. Front Immunol 2019; 10:1671. [PMID: 31379862 PMCID: PMC6658923 DOI: 10.3389/fimmu.2019.01671] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 07/04/2019] [Indexed: 12/13/2022] Open
Abstract
Monocytes are classified according to their CD14 and CD16 expression into classical (reparative), intermediate (inflammatory), and non-classical. This study assessed the frequency of monocyte and the relationship between monocyte subset percentages and the levels of blood cytokines in Colombian chagasic patients with different clinical forms. This study included chagasic patients in different clinical stages: indeterminate (IND) n = 14, chronic chagasic cardiomyopathy (CCC) n = 14, and heart transplant chagasic (HTCC) n = 9; controls with non-chagasic cardiopathy (NCC) n = 15, and healthy individuals (HI) n = 15. Peripheral blood mononuclear cells (PBMCs) were isolated, labeled for CD14, CD16, and HLA-DR, and analyzed by flow cytometry. Cytokines were measured with a bead-based immunoassay. Percentages of total CD14+ CD16+ and CD14+ HLA-DR+ monocytes were higher in patients with heart involvement (CCC, HTCC, and NCC) than controls. Percentages of intermediate monocytes increased in symptomatic chagasic patients (CCC and HTCC) compared to asymptomatic chagasic patients (IND) and controls (HI). Asymptomatic chagasic patients (IND) had higher percentages of classical monocytes, an increased production of CCL17 chemokine compared to chagasic symptomatic patients (CCC), and their levels of CCL17 was positively correlated with the percentage of classical monocyte subset. In CCC, the percentages of intermediate and classical monocytes were positively correlated with IL-6 levels, which were higher in this group compared to HI, and negatively with IL-12p40 concentration, respectively. Remarkably, there also was an important increased of classical monocytes frequency in three chronic chagasic patients who underwent cardiac transplant, of which one received anti-parasitic treatment. Our findings suggest that cardiac chagasic patients have an increased percentage of inflammatory monocytes and produce more IL-6, a biomarker of heart failure and left ventricular dysfunction, whereas asymptomatic chagasic individuals present a higher percentage of reparative monocytes and CCL17.
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Affiliation(s)
- Sergio Gómez-Olarte
- Grupo de Ciencias Básicas Médicas, School of Medicine, Universidad de los Andes, Bogotá, Colombia.,Department of Biological Sciences, School of Sciences, Universidad de los Andes, Bogotá, Colombia
| | - Natalia I Bolaños
- Grupo de Ciencias Básicas Médicas, School of Medicine, Universidad de los Andes, Bogotá, Colombia
| | - Mariana Echeverry
- Grupo de Ciencias Básicas Médicas, School of Medicine, Universidad de los Andes, Bogotá, Colombia
| | | | - Adriana Cuéllar
- Grupo de Ciencias del Laboratorio Clínico, School of Sciences, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Concepción J Puerta
- Laboratorio de Parasitología Molecular, School of Sciences, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Alejandro Mariño
- Failure and Heart Transplantation Clinic, Hospital Universitario San Ignacio, Bogotá, Colombia
| | - John M González
- Grupo de Ciencias Básicas Médicas, School of Medicine, Universidad de los Andes, Bogotá, Colombia
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Interleukin-18 in Health and Disease. Int J Mol Sci 2019; 20:ijms20030649. [PMID: 30717382 PMCID: PMC6387150 DOI: 10.3390/ijms20030649] [Citation(s) in RCA: 280] [Impact Index Per Article: 56.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 12/12/2022] Open
Abstract
Interleukin (IL)-18 was originally discovered as a factor that enhanced IFN-γ production from anti-CD3-stimulated Th1 cells, especially in the presence of IL-12. Upon stimulation with Ag plus IL-12, naïve T cells develop into IL-18 receptor (IL-18R) expressing Th1 cells, which increase IFN-γ production in response to IL-18 stimulation. Therefore, IL-12 is a commitment factor that induces the development of Th1 cells. In contrast, IL-18 is a proinflammatory cytokine that facilitates type 1 responses. However, IL-18 without IL-12 but with IL-2, stimulates NK cells, CD4+ NKT cells, and established Th1 cells, to produce IL-3, IL-9, and IL-13. Furthermore, together with IL-3, IL-18 stimulates mast cells and basophils to produce IL-4, IL-13, and chemical mediators such as histamine. Therefore, IL-18 is a cytokine that stimulates various cell types and has pleiotropic functions. IL-18 is a member of the IL-1 family of cytokines. IL-18 demonstrates a unique function by binding to a specific receptor expressed on various types of cells. In this review article, we will focus on the unique features of IL-18 in health and disease in experimental animals and humans.
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8
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de Andrade MF, de Almeida VD, de Souza LMS, Paiva DCC, Andrade CDM, de Medeiros Fernandes TAA. Involvement of neutrophils in Chagas disease pathology. Parasite Immunol 2018; 40:e12593. [PMID: 30276823 DOI: 10.1111/pim.12593] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 09/21/2018] [Accepted: 09/25/2018] [Indexed: 12/27/2022]
Abstract
Chagas disease (CD) is a public health problem in Latin America. The acute phase presents nonspecific symptoms and most patients recover from acute parasitemia and undergo a prolonged asymptomatic phase. Several years later, about 30% of infected individuals develop chronic cardiopathy with progressive cardiomegaly, arrhythmia, thromboembolic events and heart failure. These symptoms suggest a persistent association with the presence of inflammatory infiltrate and tissue, and cellular destruction in the heart muscle. Nevertheless, few research studies have attempted to understand the role of inflammatory cells, such as neutrophils, in establishing the pathology and progression of CD. Only recently have some studies been performed with this intention. Despite this effort, the role of neutrophils in CD is still considered controversial. This review discusses the morphological and functional characteristics of neutrophils that describes their participation in the establishment and progression of Trypanosoma cruzi infection, through the development of its effector functions, such as release of lithic components, production of oxidative agents and release of inflammatory mediators capable of modulating the host immune response.
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Affiliation(s)
- Micássio Fernandes de Andrade
- Department of Biomedical Sciences, School of Health Sciences, University of Rio Grande do Norte State, Mossoró, Brazil
| | - Valéria Duarte de Almeida
- Department of Biomedical Sciences, School of Health Sciences, University of Rio Grande do Norte State, Mossoró, Brazil
| | - Lara Michelly Soares de Souza
- Department of Biomedical Sciences, School of Health Sciences, University of Rio Grande do Norte State, Mossoró, Brazil
| | - Dayane Carla Costa Paiva
- Department of Biomedical Sciences, School of Health Sciences, University of Rio Grande do Norte State, Mossoró, Brazil
| | - Cléber de Mesquita Andrade
- Department of Biomedical Sciences, School of Health Sciences, University of Rio Grande do Norte State, Mossoró, Brazil
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Oliveira AC, Gomes-Neto JF, Barbosa CHD, Granato A, Reis BS, Santos BM, Fucs R, Canto FB, Nakaya HI, Nóbrega A, Bellio M. Crucial role for T cell-intrinsic IL-18R-MyD88 signaling in cognate immune response to intracellular parasite infection. eLife 2017; 6:30883. [PMID: 28895840 PMCID: PMC5629024 DOI: 10.7554/elife.30883] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 09/12/2017] [Indexed: 12/29/2022] Open
Abstract
MyD88 is the main adaptor molecule for TLR and IL-1R family members. Here, we demonstrated that T-cell intrinsic MyD88 signaling is required for proliferation, protection from apoptosis and expression of activation/memory genes during infection with the intracellular parasite Trypanosoma cruzi, as evidenced by transcriptome and cytometry analyses in mixed bone-marrow (BM) chimeras. The lack of direct IL-18R signaling in T cells, but not of IL-1R, phenocopied the absence of the MyD88 pathway, indicating that IL-18R is a critical MyD88-upstream pathway involved in the establishment of the Th1 response against an in vivo infection, a presently controvert subject. Accordingly, Il18r1−/− mice display lower levels of Th1 cells and are highly susceptible to infection, but can be rescued from mortality by the adoptive transfer of WT CD4+ T cells. Our findings establish the T-cell intrinsic IL-18R/MyD88 pathway as a crucial element for induction of cognate Th1 responses against an important human pathogen.
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Affiliation(s)
- Ana-Carolina Oliveira
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - João Francisco Gomes-Neto
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Alessandra Granato
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Bruno Maia Santos
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rita Fucs
- Instituto de Biologia, Universidade Federal Fluminense, Niterói, Brazil
| | - Fábio B Canto
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Helder I Nakaya
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil.,Instituto Nacional de Ciência e Tecnologia de Vacinas, CNPq-MCT, Belo Horizonte, Brazil.,Department of Pathology, Emory University School of Medicine, Atlanta, United States
| | - Alberto Nóbrega
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Maria Bellio
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto Nacional de Ciência e Tecnologia de Vacinas, CNPq-MCT, Belo Horizonte, Brazil
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10
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Erdmann H, Behrends J, Hölscher C. During acute experimental infection with the reticulotropic Trypanosoma cruzi strain Tulahuen IL-22 is induced IL-23-dependently but is dispensable for protection. Sci Rep 2016; 6:32927. [PMID: 27650379 PMCID: PMC5030675 DOI: 10.1038/srep32927] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 08/08/2016] [Indexed: 12/29/2022] Open
Abstract
Protective immunity against Trypanosoma cruzi, the causative agent of Chagas disease, depends on the activation of macrophages by IFN-γ and IL-17A. In contrast, IL-10 prevents immunopathology. IL-22 belongs to the IL-10 cytokine family and has pleiotropic effects during host defense and immunopathology, however its role in protection and pathology during T. cruzi infection has not been analyzed yet. Therefore, we examined the role of IL-22 in experimental Chagas disease using the reticulotropic Tulahuen strain of T. cruzi. During infection, IL-22 is secreted by CD4-positive cells in an IL-23-dependent fashion. Infected IL-22(-/-) mice exhibited an increased production of IFN-γ and TNF and displayed enhanced numbers of activated IFN-γ-producing T cells in their spleens. Additionally, the production of IL-10 was increased in IL-22(-/-) mice upon infection. Macrophage activation and by association the parasitemia was not affected in the absence of IL-22. Apart from a transient increase in the body weight loss, infected IL-22(-/-) mice did not show any signs for an altered immunopathology during the first fourteen days of infection. Taken together, although IL-22 is expressed, it seems to play a minor role in protection and pathology during the acute systemic infection with the reticulotropic Tulahuen strain of T. cruzi.
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Affiliation(s)
- Hanna Erdmann
- Division of Infection Immunology, Research Centre Borstel, Borstel, Germany
- Priority Area Infection, Research Centre Borstel, Borstel, Germany
- Cluster of Excellence Inflammation-at-Interfaces (Borstel-Kiel-Lübeck-Plön), Germany
| | - Jochen Behrends
- Fluorescence Cytometry Core Facility, Research Centre Borstel, Borstel, Germany
| | - Christoph Hölscher
- Division of Infection Immunology, Research Centre Borstel, Borstel, Germany
- Priority Area Infection, Research Centre Borstel, Borstel, Germany
- Cluster of Excellence Inflammation-at-Interfaces (Borstel-Kiel-Lübeck-Plön), Germany
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11
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Gurung P, Kanneganti TD. Immune responses against protozoan parasites: a focus on the emerging role of Nod-like receptors. Cell Mol Life Sci 2016; 73:3035-51. [PMID: 27032699 PMCID: PMC4956549 DOI: 10.1007/s00018-016-2212-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 03/11/2016] [Accepted: 03/24/2016] [Indexed: 02/07/2023]
Abstract
Nod-like receptors (NLRs) have gained attention in recent years because of the ability of some family members to assemble into a multimeric protein complex known as the inflammasome. The role of NLRs and the inflammasome in regulating innate immunity against bacterial pathogens has been well studied. However, recent studies show that NLRs and inflammasomes also play a role during infections caused by protozoan parasites, which pose a significant global health burden. Herein, we review the diseases caused by the most common protozoan parasites in the world and discuss the roles of NLRs and inflammasomes in host immunity against these parasites.
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Affiliation(s)
- Prajwal Gurung
- Department of Immunology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105-2794, USA
| | - Thirumala-Devi Kanneganti
- Department of Immunology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105-2794, USA.
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12
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Zamboni DS, Lima-Junior DS. Inflammasomes in host response to protozoan parasites. Immunol Rev 2015; 265:156-71. [DOI: 10.1111/imr.12291] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Dario S. Zamboni
- Department of Cell Biology; School of Medicine of Ribeirão Preto; University of São Paulo; Ribeirão Preto Brazil
| | - Djalma S. Lima-Junior
- Department of Cell Biology; School of Medicine of Ribeirão Preto; University of São Paulo; Ribeirão Preto Brazil
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13
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Ferreira LRP, Frade AF, Baron MA, Navarro IC, Kalil J, Chevillard C, Cunha-Neto E. Interferon-γ and other inflammatory mediators in cardiomyocyte signaling during Chagas disease cardiomyopathy. World J Cardiol 2014; 6:782-790. [PMID: 25228957 PMCID: PMC4163707 DOI: 10.4330/wjc.v6.i8.782] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Revised: 03/29/2014] [Accepted: 06/03/2014] [Indexed: 02/06/2023] Open
Abstract
Chagas disease cardiomyopathy (CCC), the main consequence of Trypanosoma cruzi (T.cruzi) infection, is an inflammatory cardiomyopathy that develops in up to 30% of infected individuals. The heart inflammation in CCC patients is characterized by a Th1 T cell-rich myocarditis with increased production of interferon (IFN)-γ, produced by the CCC myocardial infiltrate and detected at high levels in the periphery. IFN-γ has a central role in the cardiomyocyte signaling during both acute and chronic phases of T.cruzi infection. In this review, we have chosen to focus in its pleiotropic mode of action during CCC, which may ultimately be the strongest driver towards pathological remodeling and heart failure. We describe here the antiparasitic protective and pathogenic dual role of IFN-γ in Chagas disease.
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14
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Cunha-Neto E, Chevillard C. Chagas disease cardiomyopathy: immunopathology and genetics. Mediators Inflamm 2014; 2014:683230. [PMID: 25210230 PMCID: PMC4152981 DOI: 10.1155/2014/683230] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/05/2014] [Accepted: 08/05/2014] [Indexed: 02/06/2023] Open
Abstract
Chagas disease, caused by the protozoan Trypanosoma cruzi, is endemic in Latin America and affects ca. 10 million people worldwide. About 30% of Chagas disease patients develop chronic Chagas disease cardiomyopathy (CCC), a particularly lethal inflammatory cardiomyopathy that occurs decades after the initial infection, while most patients remain asymptomatic. Mortality rate is higher than that of noninflammatory cardiomyopathy. CCC heart lesions present a Th1 T-cell-rich myocarditis, with cardiomyocyte hypertrophy and prominent fibrosis. Data suggest that the myocarditis plays a major pathogenetic role in disease progression. Major unmet goals include the thorough understanding of disease pathogenesis and therapeutic targets and identification of prognostic genetic factors. Chagas disease thus remains a neglected disease, with no vaccines or antiparasitic drugs proven efficient in chronically infected adults, when most patients are diagnosed. Both familial aggregation of CCC cases and the fact that only 30% of infected patients develop CCC suggest there might be a genetic component to disease susceptibility. Moreover, previous case-control studies have identified some genes associated to human susceptibility to CCC. In this paper, we will review the immunopathogenesis and genetics of Chagas disease, highlighting studies that shed light on the differential progression of Chagas disease patients to CCC.
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Affiliation(s)
- Edecio Cunha-Neto
- Heart Institute (InCor), University of São Paulo School of Medicine, Avenida Dr. Enéas de Carvalho Aguiar, 44 Bloco 2 9° Andar, 05406-000 São Paulo, SP, Brazil
- Institute for Investigation in Immunology (iii), INCT, São Paulo, SP, Brazil
- Division of Clinical Immunology and Allergy, University of São Paulo School of Medicine, 05406-000 São Paulo, SP, Brazil
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15
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Induction of IL-12 production in human peripheral monocytes by Trypanosoma cruzi Is mediated by glycosylphosphatidylinositol-anchored mucin-like glycoproteins and potentiated by IFN- γ and CD40-CD40L interactions. Mediators Inflamm 2014; 2014:345659. [PMID: 25120285 PMCID: PMC4120781 DOI: 10.1155/2014/345659] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 06/16/2014] [Indexed: 12/04/2022] Open
Abstract
Chagas disease, caused by the protozoan parasite Trypanosoma cruzi (T. cruzi), is characterized by immunopathology driven by IFN-γ secreting Th1-like T cells. T. cruzi has a thick coat of mucin-like glycoproteins covering its surface, which plays an important role in parasite invasion and host immunomodulation. It has been extensively described that T. cruzi or its products—like GPI anchors isolated from GPI-anchored mucins from the trypomastigote life cycle stage (tGPI-mucins)—are potent inducers of proinflammatory responses (i.e., cytokines and NO production) by IFN-γ primed murine macrophages. However, little is known about whether T. cruzi or GPI-mucins exert a similar action in human cells. We therefore decided to further investigate the in vitro cytokine production profile from human mononuclear cells from uninfected donors exposed to T. cruzi as well as tGPI-mucins. We observed that both living T. cruzi trypomastigotes and tGPI-mucins are potent inducers of IL-12 by human peripheral blood monocytes and this effect depends on CD40-CD40L interaction and IFN-γ. Our findings suggest that the polarized T1-type cytokine profile seen in T. cruzi infected patients might be a long-term effect of IL-12 production induced by lifelong exposure to T. cruzi tGPI-mucins.
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16
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Esper L, Utsch L, Soriani FM, Brant F, Esteves Arantes RM, Campos CF, Pinho V, Souza DG, Teixeira MM, Tanowitz HB, Vieira LQ, Machado FS. Regulatory effects of IL-18 on cytokine profiles and development of myocarditis during Trypanosoma cruzi infection. Microbes Infect 2014; 16:481-90. [PMID: 24704475 DOI: 10.1016/j.micinf.2014.03.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 02/28/2014] [Accepted: 03/21/2014] [Indexed: 12/12/2022]
Abstract
Chagas disease, caused by Trypanosoma cruzi (Tc), is an important cause of heart disease. Resistance to Tc infection is multifactorial and associated with Th1 response. IL-18 plays an important role in regulation of IFN-γ production/development of Th1 response. However, the role of IL-18 in the setting of Tc infection remains unclear. Therefore, we investigated the role of IL-18 in the modulation of immune response and myocarditis in Tc infection. C57BL/6 and IL-18 KO mice were infected with Tc (Y or Colombian strain) and parasitemia, immune response and pathology were evaluated. Y strain infection of IL-18 KO did not alter any parameters when compared with C57BL/6 mice. However, during the acute phase (20 and 40 days post infection-dpi), Colombian strain infected-IL-18 KO mice displayed higher serum levels of IL-12 and IFN-γ, respectively, and at the chronic phase (100 dpi) an increase in splenic IFN-γ-producing CD4(+) and CD8(+) T memory cells. There was an IL-10, FOXP3 and CD4(+)CD25(+) cells reduction during acute infection in spleen. Additionally, there was a significant reduction in leukocyte infiltration and parasite load in myocardium of chronically infected IL-18 KO mice. Collectively, these data indicate that IL-18 contributes to the pathogenesis of Tc-induced myocarditis when infected with Colombian but not Y strain. These observations also underscore that parasite and host strain differences are important in evaluation of experimental Tc infection pathogenesis.
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Affiliation(s)
- Lísia Esper
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil; Postgraduate Program in Health Sciences: Infectious Diseases and Tropical Medicine, Medical School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Lara Utsch
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil
| | - Frederico M Soriani
- Department of General Biology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil
| | - Fátima Brant
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil; Postgraduate Program in Health Sciences: Infectious Diseases and Tropical Medicine, Medical School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Rosa Maria Esteves Arantes
- Department of Pathology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil
| | - Camila F Campos
- Department of Pathology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil
| | - Vanessa Pinho
- Department of Morphology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil
| | - Danielle G Souza
- Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil
| | - Mauro Martins Teixeira
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil; Postgraduate Program in Health Sciences: Infectious Diseases and Tropical Medicine, Medical School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Herbert Bernard Tanowitz
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Leda Quercia Vieira
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil; Postgraduate Program in Biological Science, NUPEB, Federal University of Ouro Preto, Ouro Preto, MG, Brazil
| | - Fabiana Simão Machado
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, MG, Brazil; Postgraduate Program in Health Sciences: Infectious Diseases and Tropical Medicine, Medical School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
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17
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Ghosh D, Stumhofer JS. Do you see what I see: Recognition of protozoan parasites by Toll-like receptors. ACTA ACUST UNITED AC 2014; 9:129-140. [PMID: 25383072 DOI: 10.2174/1573395509666131203225929] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Toll-like receptors (TLRs) are important for recognizing a variety of pathogens, including protozoan parasites, and initiating innate immune responses against them. TLRs are localized on the cell surface as well as in the endosome, and are implicated in innate sensing of these parasites. In this review, we will discuss recent findings on the identification of parasite-derived pathogen associated molecular patterns and the TLRs that bind them. The role of these TLRs in initiating the immune response against protozoan parasitic infections in vivo will be presented in the context of murine models of infection utilizing TLR-deficient mice. Additionally, we will explore evidence that TLRs and genetic variants of TLRs may impact the outcome of these parasitic infections in humans.
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Affiliation(s)
- Debopam Ghosh
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR 72205
| | - Jason S Stumhofer
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR 72205
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18
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Gonçalves VM, Matteucci KC, Buzzo CL, Miollo BH, Ferrante D, Torrecilhas AC, Rodrigues MM, Alvarez JM, Bortoluci KR. NLRP3 controls Trypanosoma cruzi infection through a caspase-1-dependent IL-1R-independent NO production. PLoS Negl Trop Dis 2013; 7:e2469. [PMID: 24098823 PMCID: PMC3789781 DOI: 10.1371/journal.pntd.0002469] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 08/27/2013] [Indexed: 12/03/2022] Open
Abstract
Trypanosoma cruzi (T. cruzi) is an intracellular protozoan parasite and the etiological agent of Chagas disease, a chronic infectious illness that affects millions of people worldwide. Although the role of TLR and Nod1 in the control of T. cruzi infection is well-established, the involvement of inflammasomes remains to be elucidated. Herein, we demonstrate for the first time that T. cruzi infection induces IL-1β production in an NLRP3- and caspase-1-dependent manner. Cathepsin B appears to be required for NLRP3 activation in response to infection with T. cruzi, as pharmacological inhibition of cathepsin B abrogates IL-1β secretion. NLRP3−/− and caspase1−/− mice exhibited high numbers of T. cruzi parasites, with a magnitude of peak parasitemia comparable to MyD88−/− and iNOS−/− mice (which are susceptible models for T. cruzi infection), indicating the involvement of NLRP3 inflammasome in the control of the acute phase of T. cruzi infection. Although the inflammatory cytokines IL-6 and IFN-γ were found in spleen cells from NLRP3−/− and caspase1−/− mice infected with T. cruzi, these mice exhibited severe defects in nitric oxide (NO) production and an impairment in macrophage-mediated parasite killing. Interestingly, neutralization of IL-1β and IL-18, and IL-1R genetic deficiency demonstrate that these cytokines have a minor effect on NO secretion and the capacity of macrophages to control T. cruzi infection. In contrast, inhibition of caspase-1 with z-YVAD-fmk abrogated NO production by WT and MyD88−/− macrophages and rendered them as susceptible to T. cruzi infection as NLRP3−/− and caspase-1−/− macrophages. Taken together, our results demonstrate a role for the NLRP3 inflammasome in the control of T. cruzi infection and identify NLRP3-mediated, caspase-1-dependent and IL-1R-independent NO production as a novel effector mechanism for these innate receptors. Inflammasomes are cytosolic innate receptors that are emerging as central effectors in the control of infections and inflammatory pathologies. NLRP3 is the most studied member of inflammasomes with established role in the control of bacterial and viral infections. This manuscript describes original studies on the involvement of NLRP3 inflammasome in the control of Trypanosoma cruzi, the etiological agent of Chagas disease, a chronic infectious illness that affects millions of people in the world. T. cruzi activates NLRP3 inflammasome by a mechanism involving cathepsin B. NLRP3−/− and caspase1−/− mice display high parasitemia during acute phase of T. cruzi infection, which could be explained by a severe defect in the production of nitric oxide (NO) and in the impairment of their macrophages to control intracellular parasites. Interestingly, inhibition of caspase-1, but not the neutralization of IL-1β and IL-18, the best-studied caspase-1 substrates, abrogated NO production by WT and MyD88−/− macrophages and rendered them as susceptible to T. cruzi infection as NLRP3−/− macrophages. Together, our results indicate a caspase-1-dependent and IL-1β and IL-18-independent pathway for NO production as a new effector mechanism played by NLRP3 to control T. cruzi infection.
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Affiliation(s)
- Virginia M. Gonçalves
- Centro de Terapia Celular e Molecular (CTC-Mol), Universidade Federal de São Paulo, Vl Clementino, São Paulo, Brazil
| | - Kely C. Matteucci
- Centro de Terapia Celular e Molecular (CTC-Mol), Universidade Federal de São Paulo, Vl Clementino, São Paulo, Brazil
| | - Carina L. Buzzo
- Centro de Terapia Celular e Molecular (CTC-Mol), Universidade Federal de São Paulo, Vl Clementino, São Paulo, Brazil
| | - Bruna H. Miollo
- Centro de Terapia Celular e Molecular (CTC-Mol), Universidade Federal de São Paulo, Vl Clementino, São Paulo, Brazil
| | - Danny Ferrante
- Centro de Terapia Celular e Molecular (CTC-Mol), Universidade Federal de São Paulo, Vl Clementino, São Paulo, Brazil
| | - Ana C. Torrecilhas
- Departamento de Ciências Biológicas - ICAQF, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Mauricio M. Rodrigues
- Centro de Terapia Celular e Molecular (CTC-Mol), Universidade Federal de São Paulo, Vl Clementino, São Paulo, Brazil
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Jose M. Alvarez
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Cidade Universitária, São Paulo, Brazil
| | - Karina R. Bortoluci
- Centro de Terapia Celular e Molecular (CTC-Mol), Universidade Federal de São Paulo, Vl Clementino, São Paulo, Brazil
- Departamento de Ciências Biológicas - ICAQF, Universidade Federal de São Paulo, São Paulo, Brazil
- * E-mail:
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19
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Silva GK, Costa RS, Silveira TN, Caetano BC, Horta CV, Gutierrez FRS, Guedes PMDM, Andrade WA, De Niz M, Gazzinelli RT, Zamboni DS, Silva JS. Apoptosis-associated speck-like protein containing a caspase recruitment domain inflammasomes mediate IL-1β response and host resistance to Trypanosoma cruzi infection. THE JOURNAL OF IMMUNOLOGY 2013; 191:3373-83. [PMID: 23966627 DOI: 10.4049/jimmunol.1203293] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The innate immune response to Trypanosoma cruzi infection comprises several pattern recognition receptors (PRRs), including TLR-2, -4, -7, and -9, as well as the cytosolic receptor Nod1. However, there are additional PRRs that account for the host immune responses to T. cruzi. In this context, the nucleotide-binding oligomerization domain-like receptors (NLRs) that activate the inflammasomes are candidate receptors that deserve renewed investigation. Following pathogen infection, NLRs form large molecular platforms, termed inflammasomes, which activate caspase-1 and induce the production of active IL-1β and IL-18. In this study, we evaluated the involvement of inflammasomes in T. cruzi infection and demonstrated that apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC) inflammasomes, including NLR family, pyrin domain-containing 3 (NLRP3), but not NLR family, caspase recruitment domain-containing 4 or NLR family, pyrin domain-containing 6, are required for triggering the activation of caspase-1 and the secretion of IL-1β. The mechanism by which T. cruzi mediates the activation of the ASC/NLRP3 pathway involves K⁺ efflux, lysosomal acidification, reactive oxygen species generation, and lysosomal damage. We also demonstrate that despite normal IFN-γ production in the heart, ASC⁻/⁻ and caspase-1⁻/⁻ infected mice exhibit a higher incidence of mortality, cardiac parasitism, and heart inflammation. These data suggest that ASC inflammasomes are critical determinants of host resistance to infection with T. cruzi.
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Affiliation(s)
- Grace Kelly Silva
- Department of Biochemistry and Immunology, Ribeirão Preto Medical School, University of São Paulo, 14049-900 Ribeirão Preto, São Paulo, Brazil
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20
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Santamaría MH, Corral RS. Osteopontin-dependent regulation of Th1 and Th17 cytokine responses in Trypanosoma cruzi-infected C57BL/6 mice. Cytokine 2012. [PMID: 23199812 DOI: 10.1016/j.cyto.2012.10.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Osteopontin (OPN) is a multifunctional protein participating in the regulation of different Th cell lineages and critically involved in the initiation of immune responses to diverse pathogens. Our study goal was to verify whether OPN helps modulate the protective Th1 and Th17 cytokine responses in C57BL/6 mice infected with Trypanosoma cruzi, the etiological agent of Chagas disease. Parasite infection induced OPN release from murine macrophages in vitro and acute Chagas mice displayed enhanced serum levels of this cytokine at the peak of parasitemia. Upon administration of a neutralizing anti-OPN antibody, recently infected mice presented lower Th1 and Th17 responses, increased parasitemia and succumbed earlier and at higher rates to infection than non-immune IgG-receiving controls. The anti-OPN therapy also resulted in reduced circulating levels of IL-12 p70, IFN-γ, IL-17A and specific IgG(2a) antibodies. Furthermore, antibody-mediated blockade of OPN activity abrogated the ex vivo production of IL-12 p70, IFN-γ and IL-17A, while promoting IL-10 secretion, by spleen macrophages and CD4(+) T cells from T. cruzi-infected mice. Th1 and Th17 cytokine release induced by OPN preferentially involved the α(v)β(3) integrin OPN receptor, whereas concomitant down-modulation of IL-10 production would mostly depend on OPN interaction with CD44. Our findings suggest that, in resistant C57BL/6 mice, elicitation of protective Th1 and Th17 cytokine responses to T. cruzi infection is likely to be regulated by endogenous OPN.
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Affiliation(s)
- Miguel H Santamaría
- Laboratorio de Biología Experimental, Centro de Estudios Metabólicos, CP 39005 Santander, Spain
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21
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Teixeira PC, Frade AF, Nogueira LG, Kalil J, Chevillard C, Cunha-Neto E. Pathogenesis of Chagas disease cardiomyopathy. World J Clin Infect Dis 2012; 2:39-53. [DOI: 10.5495/wjcid.v2.i3.39] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Chagas disease, or American trypanosomiasis, is a parasitic infection caused by the flagellate protozoan Trypanosoma cruzi. Chagas disease is mainly affecting rural populations in Mexico and Central and South America. The World Health Organization estimates that 300 000 new cases of Chagas disease occur every year and approximately 20 000 deaths are attributable to Chagas. However, this organisation classified Chagas disease as a neglected tropical disease. The economic burden of this disease is significant. In many Latin American countries, the direct and indirect costs, including the cost of health care in dollars and loss of productivity, attributable to Chagas disease ranges from $40 million to in excess of $800 million per nation per annum. So, it remains a contemporary public health concern. In chronic phase, mortality is primarily due to the rhythm disturbances and congestive heart failure that result from the chronic inflammatory cardiomyopathy (CCC) due to the persistence presence of parasites in the heart tissue. Mechanisms underlying differential progression to CCC are still incompletely understood. In the last decades immunological proteomic genetic approaches lead to significant results which help to disperse the veil covering the knowledge of the pathogenic process. Here, we reported these significant progresses.
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22
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Rodrigues MM, Oliveira AC, Bellio M. The Immune Response to Trypanosoma cruzi: Role of Toll-Like Receptors and Perspectives for Vaccine Development. J Parasitol Res 2012; 2012:507874. [PMID: 22496959 PMCID: PMC3306967 DOI: 10.1155/2012/507874] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Accepted: 10/31/2011] [Indexed: 02/06/2023] Open
Abstract
In the past ten years, studies have shown the recognition of Trypanosoma cruzi-associated molecular patterns by members of the Toll-like receptor (TLR) family and demonstrated the crucial participation of different TLRs during the experimental infection with this parasite. In the present review, we will focus on the role of TLR-activated pathways in the modulation of both innate and acquired immune responses to T. cruzi infection, as well as discuss the state of the art of vaccine research and development against the causative agent of Chagas disease (or American trypanosomiasis).
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Affiliation(s)
- Mauricio M. Rodrigues
- Centro de Terapia Celular e Molecular (CTCMol), Universidade Federal de São Paulo (UNIFESP), 04044-010 São Paulo, SP, Brazil
| | - Ana Carolina Oliveira
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), 21941-902 Rio de Janeiro, RJ, Brazil
| | - Maria Bellio
- Instituto de Microbiologia Paulo de Góes, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Avenida Carlos Chagas Filho, 373 Bloco D, sala 35, Cidade Universitária, 21941-902 Rio de Janeiro, RJ, Brazil
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23
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Caetano BC, Carmo BB, Melo MB, Cerny A, dos Santos SL, Bartholomeu DC, Golenbock DT, Gazzinelli RT. Requirement of UNC93B1 reveals a critical role for TLR7 in host resistance to primary infection with Trypanosoma cruzi. THE JOURNAL OF IMMUNOLOGY 2011; 187:1903-11. [PMID: 21753151 DOI: 10.4049/jimmunol.1003911] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
UNC93B1 associates with TLR3, 7, and 9, mediating their translocation from the endoplasmic reticulum to the endolysosome, thus allowing proper activation by microbial nucleic acids. We found that the triple-deficient 3d mice, which lack functional UNC93B1 as well as functional endosomal TLRs, are highly susceptible to infection with Trypanosoma cruzi. The enhanced parasitemia and mortality in 3d animals were associated with impaired proinflammatory response, including reduced levels of IL-12p40 and IFN-γ. Importantly, the phenotype of 3d mice was intermediary between MyD88(-/-) (highly susceptible) and TLR9(-/-) (moderately susceptible), indicating the involvement of an additional UN93B1-dependent TLR(s) on host resistance to T. cruzi. Hence, our experiments also revealed that TLR7 is a critical innate immune receptor involved in recognition of parasite RNA, induction of IL-12p40 by dendritic cells, and consequent IFN-γ by T lymphocytes. Furthermore, we show that upon T. cruzi infection, triple TLR3/7/9(-/-) mice had similar phenotype than 3d mice. These data imply that the nucleic acid-sensing TLRs are critical determinants of host resistance to primary infection with T. cruzi.
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Affiliation(s)
- Braulia C Caetano
- Division of Infectious Disease and Immunology, University of Massachusetts Medical School, Worcester, MA 01605, USA
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The endless race between Trypanosoma cruzi and host immunity: lessons for and beyond Chagas disease. Expert Rev Mol Med 2010; 12:e29. [PMID: 20840799 DOI: 10.1017/s1462399410001560] [Citation(s) in RCA: 131] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Infection with the protozoan parasite Trypanosoma cruzi, the agent of Chagas disease, is characterised by a variable clinical course - from symptomless cases to severe chronic disease with cardiac and/or gastrointestinal involvement. The variability in disease outcome has been attributed to host responses as well as parasite heterogeneity. In this article, we review studies indicating the importance of immune responses as key determinants of host resistance to T. cruzi infection and the pathogenesis of Chagas disease. Particular attention is given to recent studies defining the role of cognate innate immune receptors and immunodominant CD8+ T cells that recognise parasite components - both crucial for host-parasite interaction and disease outcome. In light of these studies we speculate about parasite strategies that induce a strong and long-lasting T-cell-mediated immunity but at the same time allow persistence of the parasite in the vertebrate host. We also discuss what we have learned from these studies for increasing our understanding of Chagas pathogenesis and for the design of new strategies to prevent the development of Chagas disease. Finally, we highlight recent studies employing a genetically engineered attenuated T. cruzi strain as a vaccine shuttle that elicits potent T cell responses specific to a tumour antigen and protective immunity against a syngeneic melanoma cell line.
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Kayama H, Takeda K. The innate immune response to Trypanosoma cruzi infection. Microbes Infect 2010; 12:511-7. [DOI: 10.1016/j.micinf.2010.03.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Accepted: 03/17/2010] [Indexed: 12/13/2022]
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Kayama H, Koga R, Atarashi K, Okuyama M, Kimura T, Mak TW, Uematsu S, Akira S, Takayanagi H, Honda K, Yamamoto M, Takeda K. NFATc1 mediates Toll-like receptor-independent innate immune responses during Trypanosoma cruzi infection. PLoS Pathog 2009; 5:e1000514. [PMID: 19609356 PMCID: PMC2704961 DOI: 10.1371/journal.ppat.1000514] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Accepted: 06/17/2009] [Indexed: 12/12/2022] Open
Abstract
Host defense against the intracellular protozoan parasite Trypanosoma cruzi depends on Toll-like receptor (TLR)-dependent innate immune responses. Recent studies also suggest the presence of TLR-independent responses to several microorganisms, such as viruses, bacteria, and fungi. However, the TLR-independent responses to protozoa remain unclear. Here, we demonstrate a novel TLR-independent innate response pathway to T. cruzi. Myd88−/−Trif−/− mice lacking TLR signaling showed normal T. cruzi-induced Th1 responses and maturation of dendritic cells (DCs), despite high sensitivity to the infection. IFN-γ was normally induced in T. cruzi-infected Myd88−/−Trif−/− innate immune cells, and further was responsible for the TLR-independent Th1 responses and DC maturation after T. cruzi infection. T. cruzi infection induced elevation of the intracellular Ca2+ level. Furthermore, T. cruzi-induced IFN-γ expression was blocked by inhibition of Ca2+ signaling. NFATc1, which plays a pivotal role in Ca2+ signaling in lymphocytes, was activated in T. cruzi-infected Myd88−/−Trif−/− innate immune cells. T. cruzi-infected Nfatc1−/− fetal liver DCs were impaired in IFN-γ production and DC maturation. These results demonstrate that NFATc1 mediates TLR-independent innate immune responses in T. cruzi infection. Trypanosoma cruzi is an intracellular protozoan parasite that causes Chagas diseases in humans. Invasion of T. cruzi into the host is sensed by Toll-like receptors (TLRs), which recognize microbial components that are present in microbes but not in the host. TLRs are essential for the initiation of immune responses against pathogens. Recent evidence indicates the presence of TLR-independent mechanisms for the recognition of microbes, such as bacteria, viruses, and fungi. However, TLR-independent recognition of protozoa remains unknown. We found that immune responses against T. cruzi were induced even in the absence of TLR signaling. The TLR-independent responses were found to be mediated by IFN-γ production in innate immune cells. Furthermore, the TLR-independent IFN-γ production was revealed to be mediated by Ca2+-dependent activation of NFATc1, which has been shown to play a pivotal role in cytokine production in T lymphocytes. Our study provides a novel mechanism for the TLR-independent innate immune response against protozoan parasites. It is also worth noting that the host defense mechanism utilizes a factor (Ca2+) that is a prerequisite for the survival of intracellular protozoan parasites.
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Affiliation(s)
- Hisako Kayama
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Molecular Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
- WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Ritsuko Koga
- Department of Molecular Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Koji Atarashi
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Molecular Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
- WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Megumi Okuyama
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Taishi Kimura
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tak W. Mak
- Ontario Cancer Institute, Princess Margaret Hospital, Toronto, Ontario, Canada, and Department of Medical Biophysics, Advanced Medical Discovery Institute, University of Toronto, Toronto, Ontario Canada
| | - Satoshi Uematsu
- WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Shizuo Akira
- WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Hiroshi Takayanagi
- Department of Cell Signaling, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kenya Honda
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Masahiro Yamamoto
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Kiyoshi Takeda
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Molecular Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
- WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- * E-mail:
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Zafra G, Morillo C, Martín J, González A, González CI. Polymorphism in the 3' UTR of the IL12B gene is associated with Chagas' disease cardiomyopathy. Microbes Infect 2007; 9:1049-52. [PMID: 17644387 DOI: 10.1016/j.micinf.2007.04.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2006] [Revised: 03/22/2007] [Accepted: 04/21/2007] [Indexed: 10/23/2022]
Abstract
The aim of this study was to investigate the possible influence of a 3' untranslated region (3' UTR) polymorphism of the IL12B gene in susceptibility to Trypanosoma cruzi infection or in the development to cardiomyopathy in Chagas' disease (CD). We determined the IL12B 3' UTR genotypes in a sample of 200 seronegative individuals and 260 serologically positive patients (130 with Chagasic cardiomyopathy and 130 asymptomatic). All individuals are from a Colombian region where T. cruzi infection is endemic. Genotyping was performed by the PCR-restriction fragment length polymorphism (RFLP) method. The overall distribution of the IL12B 3' UTR alleles and genotypes in seronegative compared with seropositive individuals was not statistically significant. Interestingly, we found that the IL12B 3' UTR CC genotype was significantly increased among cardiomyopathic patients when compared to asymptomatic individuals (16% versus 5%; P=0.005; P(c)=0.015; OR=3.39; 95% CI 1.3-9.15). In addition, we observed that the IL12B 3' UTR C allele was present at significantly higher frequency in cardiomyopathic (33% versus 22%; P=0.008; P(c)=0.016; OR=1.69; 95% CI 1.12-2.55) as compared to asymptomatic. Our results suggest that IL12B 3' UTR gene polymorphisms may influence the susceptibility to develop Chagasic cardiomyopathy.
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Affiliation(s)
- German Zafra
- Grupo de Inmunología y Epidemiología Molecular, GIEM, Facultad de Salud, Universidad Industrial de Santander, Carrera 32 #29-31, Bucaramanga AA 678, Colombia
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Graefe SEB, Streichert T, Budde BS, Nürnberg P, Steeg C, Müller-Myhsok B, Fleischer B. Genes from Chagas susceptibility loci that are differentially expressed in T. cruzi-resistant mice are candidates accounting for impaired immunity. PLoS One 2006; 1:e57. [PMID: 17183687 PMCID: PMC1762350 DOI: 10.1371/journal.pone.0000057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2006] [Accepted: 10/20/2006] [Indexed: 11/19/2022] Open
Abstract
Variation between inbred mice of susceptibility to experimental Trypanosoma cruzi infection has frequently been described, but the immunogenetic background is poorly understood. The outcross of the susceptible parental mouse strains C57BL/6 (B6) and DBA/2 (D2), B6D2F1 (F1) mice, is highly resistant to this parasite. In the present study we show by quantitative PCR that the increase of tissue parasitism during the early phase of infection is comparable up to day 11 between susceptible B6 and resistant F1 mice. A reduction of splenic parasite burdens occurs thereafter in both strains but is comparatively retarded in susceptible mice. Splenic microarchitecture is progressively disrupted with loss of follicles and B lymphocytes in B6 mice, but not in F1 mice. By genotyping of additional backcross offspring we corroborate our earlier findings that susceptibility maps to three loci on Chromosomes 5, 13 and 17. Analysis of gene expression of spleen cells from infected B6 and F1 mice with microarrays identifies about 0.3% of transcripts that are differentially expressed. Assuming that differential susceptibility is mediated by altered gene expression, we propose that the following differentially expressed transcripts from these loci are strong candidates for the observed phenotypic variation: H2-Eα, H2-D1, Ng23, Msh5 and Tubb5 from Chromosome 17; and Cxcl11, Bmp2k and Spp1 from Chromosome 5. Our results indicate that innate mechanisms are not of primary relevance to resistance of F1 mice to T. cruzi infection, and that differential susceptibility to experimental infection with this protozoan pathogen is not paralleled by extensive variation of the transcriptome.
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Affiliation(s)
- Sebastian E B Graefe
- Institute for Immunology, University Hospital Eppendorf, Hamburg, Germany; Department for Medical Microbiology and Immunology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Germany.
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Lieke T, Steeg C, Graefe SEB, Fleischer B, Jacobs T. Interaction of natural killer cells with Trypanosoma cruzi-infected fibroblasts. Clin Exp Immunol 2006; 145:357-64. [PMID: 16879257 PMCID: PMC1809687 DOI: 10.1111/j.1365-2249.2006.03118.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The protozoan parasite Trypanosoma cruzi circulates in the blood as trypomastigotes and invades a variety of cells to multiply intracellularly as amastigotes. The acute phase triggers an immune response that restricts the proliferation of the parasite. However, parasites are able to persist in different tissues causing the pathology of Chagas' disease. Natural killer (NK) cells play an important role in innate resistance to a variety of pathogens. In the present study we demonstrate that NK cells trigger trypanocidal mechanisms in infected L929 cells that are critically dependent on inducible nitric oxide (NO) synthase (iNOS) induction which is, to a major degree, triggered by interferon (IFN)-gamma provided by NK cells. This work provides a more detailed analysis of how NK cells as a part of the innate immune system participate in the control of parasites that reside intracellularly in fibroblast-like L929 cells.
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Affiliation(s)
- T Lieke
- Department of Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.
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Sardinha LR, Elias RM, Mosca T, Bastos KRB, Marinho CRF, D'Império Lima MR, Alvarez JM. Contribution of NK, NK T, gamma delta T, and alpha beta T cells to the gamma interferon response required for liver protection against Trypanosoma cruzi. Infect Immun 2006; 74:2031-42. [PMID: 16552032 PMCID: PMC1418886 DOI: 10.1128/iai.74.4.2031-2042.2006] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
In the present work, we show that intracellular Trypanosoma cruzi is rarely found in the livers of acutely infected mice, but inflammation is commonly observed. The presence of numerous intrahepatic amastigotes in infected gamma interferon (IFN-gamma)-deficient mice corroborates the notion that the liver is protected by an efficient local immunity. The contribution of different cell populations was suggested by data showing that CD4- and CD8-deficient mice were able to restrain liver parasite growth. Therefore, we have characterized the liver-infiltrating lymphocytes and determined the sources of IFN-gamma during acute T. cruzi infection. We observed that natural killer (NK) cells increased by day 7, while T and B cells increased by day 14. Among CD3+ cells, CD4+, CD8+, and CD4- CD8- cell populations were greatly expanded. A large fraction of CD3+ cells were positive for PanNK, a beta1 integrin expressed by NK and NK T cells. However, these lymphocytes were not classic NK T cells because they did not express NK1.1 and showed no preferential usage of Vbeta8. Otherwise, liver NK T (CD3+ NK1.1+) cells were not increased in acutely infected mice. The majority of PanNK+ CD4+ and PanNK+ CD8+ cells expressed T-cell receptor alphabeta (TCRalphabeta), whereas PanNK+ CD4- CD8- cells were positive for TCRgammadelta. In fact, gammadelta T cells showed the most remarkable increase (40- to 100-fold) among liver lymphocytes. Most importantly, intracellular analysis revealed high levels of IFN-gamma production at day 7 by NK cells and at day 14 by CD4+, CD8+, and CD4- CD8- TCRgammadelta+ cells. We concluded that NK cells are a precocious source of IFN-gamma in the livers of acutely infected mice, and, as the disease progresses, conventional CD4+ and CD8+ T cells and gammadelta T cells, but not classic NK-T cells, may provide the IFN-gamma required for liver protection against T. cruzi.
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MESH Headings
- Acute Disease
- Animals
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/metabolism
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- Chagas Disease/immunology
- Chagas Disease/pathology
- Chagas Disease/prevention & control
- Female
- Immunophenotyping
- Interferon-gamma/biosynthesis
- Interferon-gamma/deficiency
- Interferon-gamma/genetics
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Liver/immunology
- Liver/parasitology
- Liver/pathology
- Mice
- Mice, Inbred A
- Mice, Inbred BALB C
- Mice, Inbred C3H
- Mice, Inbred C57BL
- Mice, Knockout
- Receptors, Antigen, T-Cell, alpha-beta/biosynthesis
- Receptors, Antigen, T-Cell, gamma-delta/biosynthesis
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
- Trypanosoma cruzi/immunology
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Affiliation(s)
- Luiz Roberto Sardinha
- Departamento de Imunologia, ICB, Av. Prof. Lineu Prestes, 1730, Universidade de São Paulo, São Paulo, SP CEP-05508-000, Brazil.
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31
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da Silveira ABM, Arantes RME, Vago AR, Lemos EM, Adad SJ, Correa-Oliveira R, D'Avila Reis D. Comparative study of the presence of Trypanosoma cruzi kDNA, inflammation and denervation in chagasic patients with and without megaesophagus. Parasitology 2006; 131:627-34. [PMID: 16255821 DOI: 10.1017/s0031182005008061] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2005] [Revised: 04/06/2005] [Accepted: 04/07/2005] [Indexed: 11/06/2022]
Abstract
Neuronal lesions have been considered the hallmark of chagasic megaesophagus, but the role of Trypanosoma cruzi and the participation of the inflammatory cells in this process are still debated. In the present study we counted neurons in the oesophagus from patients with and without megaesophagus and further examined these samples for the presence of parasite kDNA and cells with cytolytic potential (Natural Killer cells, cytotoxic lymphocytes and macrophages). The presence of parasite kDNA was demonstrated in 100% of cases with megaesophagus and in 60% of patients without megaesophagus. When analysed for the number of neurons, the patients without megaesophagus could be classified into 2 groups, as having normal or a decreased number of neurons. The former group did not show any inflammatory process, but interestingly, all patients without megaesophagus presenting decreased number of neurons also presented both parasite kDNA and inflammatory process in the organ. We further observed that the numbers of cytotoxic cells in the myenteric plexus region inversely correlate with the number of neurons. These data together strongly suggest that chronic lesions in chagasic megaesophagus might be a consequence of immune-mediated mechanisms, that last until the chronic phase of infection, and are dependent on the persistence of parasite in the host's tissue.
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Affiliation(s)
- A B M da Silveira
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, Minas Gerais, Brazil
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Machado FS, Koyama NS, Carregaro V, Ferreira BR, Milanezi CM, Teixeira MM, Rossi MA, Silva J. CCR5 plays a critical role in the development of myocarditis and host protection in mice infected with Trypanosoma cruzi. J Infect Dis 2005; 191:627-36. [PMID: 15655788 PMCID: PMC7109658 DOI: 10.1086/427515] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2004] [Accepted: 08/15/2004] [Indexed: 01/18/2023] Open
Abstract
The pathogenesis of myocarditis during Trypanosoma cruzi infection is poorly understood. We investigated the role played by chemokine receptor 5 (CCR5) in the influx of T cells to the cardiac tissue of T. cruzi—infected mice. mRNA and protein for the CCR5 ligands CCL3, CCL4, and CCL5 were detected in the hearts of infected mice in association with CD4+ and CD8+ T cells. There was a high level of CCR5 expression on CD8+ T cells in the hearts of infected mice. Moreover, CCR5 expression on CD8+ T cells was positively modulated by T. cruzi infection. CCR5-deficient mice infected with T. cruzi experienced a dramatically inhibited migration of T cells to the heart and were also more susceptible to infection. These results suggest that CCR5 and its ligands play a central role in the control of T cell influx in T. cruzi-infected mice. Knowledge of the mechanisms that trigger and control the migration of cells to the heart in patients with Chagas disease may help in the design of drugs that prevent myocarditis and protect against the development of severe disease.
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Affiliation(s)
| | - Natalia S. Koyama
- Department of Biochemistry and Immunology, Ribeirão Preto, São Paulo
| | - Vanessa Carregaro
- Department of Biochemistry and Immunology, Ribeirão Preto, São Paulo
| | | | | | - Mauro M. Teixeira
- Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marcos A.i Rossi
- Department of Pathology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo
| | - João Silva
- Department of Biochemistry and Immunology, Ribeirão Preto, São Paulo
- Reprints or correspondence: João S. Silva, Dept. of Biochemistry and Immunology, School of Medicine of Ribeirão Preto-USP, Av. Bandeirantes, 3900, 14049-900 Ribeirèo Preto, SP, Brazil ()
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Lieke T, Graefe SEB, Klauenberg U, Fleischer B, Jacobs T. NK cells contribute to the control of Trypanosoma cruzi infection by killing free parasites by perforin-independent mechanisms. Infect Immun 2004; 72:6817-25. [PMID: 15557602 PMCID: PMC529106 DOI: 10.1128/iai.72.12.6817-6825.2004] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The protozoan parasite Trypanosoma cruzi circulates in the blood as trypomastigotes and invades a variety of cells to multiply intracellularly as amastigotes. The acute phase leads to an immune response that restricts the proliferation of the parasite. However, parasites are able to persist in different tissues, which causes the pathology of Chagas' disease. Natural killer (NK) cells play an important role in innate resistance to a variety of pathogens. In the present study we analyzed whether NK cells participated in the control of experimental T. cruzi infection. NK cells were depleted from C57BL/6 mice by antiasialo antibodies. This treatment caused an increased parasitemia during the acute phase, but tissue parasite burdens were not significantly altered according to quantitative real-time PCR. Our results demonstrated that NK cells were activated during the initial phase of a T. cruzi infection and exhibited a contact-dependent antiparasitic activity against extracellular parasites that was independent from perforin. Thus, NK cells limit the propagation of the parasite by acting on circulating T. cruzi trypomastigotes.
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Affiliation(s)
- Thorsten Lieke
- Department of Immunology, Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Strasse 76, 20359 Hamburg, Germany
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Murphey ED, Lin CY, McGuire RW, Toliver-Kinsky T, Herndon DN, Sherwood ER. Diminished bacterial clearance is associated with decreased IL-12 and interferon-gamma production but a sustained proinflammatory response in a murine model of postseptic immunosuppression. Shock 2004; 21:415-25. [PMID: 15087817 DOI: 10.1097/00024382-200405000-00004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
After a major illness or injury, immune status in critically ill patients may fluctuate between a marked proinflammatory response and an immunosuppressed state. Postinflammatory immunosuppression can result in increased susceptibility to infection. Alterations of cytokine production, such as suppression of IFNgamma and elevation of the anti-inflammatory cytokine IL-10, are believed to contribute to postinflammatory immunosuppression. We examined antimicrobial immunity in mice that had previously been subjected to a sublethal cecal ligation and puncture (CLP) as a model of major injury. Mice were challenged with Pseudomonas aeruginosa (5 x 10(7) CFU i.v.) on day 5 after CLP or sham surgery. Bacterial clearance in mice after CLP was impaired and associated with decreased production of IFNgamma and increased production of IL-10 in the early response to the Pseudomonas challenge. Pseudomonas-induced production of the IFNgamma-inducing factor IL-12 was also decreased in post-CLP mice. However, splenocytes from post-CLP mice remained responsive to exogenous stimulation with the IFNgamma-inducing cytokines IL-12, IL-15, and IL-18 as well as T-cell receptor activation. Furthermore, production of the proinflammatory cytokines TNF-alpha, IL-1beta, and IL-6 were as high, or higher, in the post-CLP group compared with sham mice after P. aeruginosa challenge. Blockade of IL-10 did not reverse IL-12 and IFNgamma suppression in splenocytes from post-CLP mice. These studies show that suppressed bacterial clearance in post-CLP mice is associated with decreased production of IFNgamma and IL-12 and with increased production of IL-10 and proinflammatory cytokines.
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Affiliation(s)
- E D Murphey
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555, USA.
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35
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Gazzinelli RT, Ropert C, Campos MA. Role of the Toll/interleukin-1 receptor signaling pathway in host resistance and pathogenesis during infection with protozoan parasites. Immunol Rev 2004; 201:9-25. [PMID: 15361229 DOI: 10.1111/j.0105-2896.2004.00174.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Different studies have illustrated the activation of the innate immune system during infection with protozoan parasites. Experiments performed in vivo also support the notion that innate immunity has a crucial role in resistance as well as pathogenesis observed during protozoan infections such as malaria, leishmaniasis, toxoplasmosis, and trypanosomiasis. While major advances have been made in the assignment of bacterial molecules as Toll-like receptors (TLRs) agonists as well as defining the role of the Toll/interleukin-1 receptor (TIR) signaling pathway in host resistance to bacterial infection, this research area is now emerging in the field of protozoan parasites. In this review, we discuss the recent studies describing parasite molecules as TLR agonists and those studies indicating the essential role of the TIR-domain bearing molecule named myeloid differentiation factor 88 in host resistance to infection with protozoan parasites. Together, these studies support the hypothesis that the TIR signaling pathway is involved in the initial recognition of protozoan parasites by the immune system of the vertebrate host, early resistance to infection, development of acquired immunity, as well as pathology observed during acute infection with this class of pathogens.
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Affiliation(s)
- Ricardo T Gazzinelli
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
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Graefe SEB, Jacobs T, Wächter U, Bröker BM, Fleischer B. CTLA-4 regulates the murine immune response to Trypanosoma cruzi infection. Parasite Immunol 2004; 26:19-28. [PMID: 15198642 DOI: 10.1111/j.0141-9838.2004.00679.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Infection with Trypanosoma cruzi causes a profound suppression of T cell responsiveness to polyclonal or antigenic stimuli. In this study, we quantified expression of the negative T cell regulatory molecule CTLA-4 in T. cruzi infected mice and analysed its influence on the immune suppression. Levels of splenic CTLA-4 expression were highest around day 10 after infection, reaching 5% in resistant B6D2F1 mice, but exceeding 10% of CD4(+) T cells in C57BL/6 mice that were susceptible to mortal disease. The proliferative response of explanted splenocytes to CD3-mediated stimulation was strongly suppressed in both the susceptible and the resistant strains. Blockade of CTLA-4 in vitro with a monoclonal antibody affected neither proliferative response nor cytokine production (IFN-gamma, IL-4 and IL-2) by splenic T cells from infected C57BL/6 mice. Treatment of mice with anti-CTLA-4 antibody on the day of infection decreased IFN-gamma production and reduced mortality by about 50%. We conclude that high CTLA-4 expression is a hallmark of severe disease in murine T. cruzi infection, and that CTLA-4 has a regulative influence at the early stages during priming of the immune reaction to the parasite, augmenting a strong Th1-biased response.
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Affiliation(s)
- S E B Graefe
- Bernhard-Nocht-Institute, Department of Immunology, Hamburg, Germany.
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