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Herreros-Cabello A, Del Moral-Salmoral J, Morato E, Marina A, Barrocal B, Fresno M, Gironès N. Quantitative Proteomic Analysis of Macrophages Infected with Trypanosoma cruzi Reveals Different Responses Dependent on the SLAMF1 Receptor and the Parasite Strain. Int J Mol Sci 2024; 25:7493. [PMID: 39000601 PMCID: PMC11242706 DOI: 10.3390/ijms25137493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 06/29/2024] [Accepted: 07/04/2024] [Indexed: 07/16/2024] Open
Abstract
Chagas disease is caused by the intracellular protozoan parasite Trypanosoma cruzi. This disease affects mainly rural areas in Central and South America, where the insect vector is endemic. However, this disease has become a world health problem since migration has spread it to other continents. It is a complex disease with many reservoirs and vectors and high genetic variability. One of the host proteins involved in the pathogenesis is SLAMF1. This immune receptor acts during the infection of macrophages controlling parasite replication and thus affecting survival in mice but in a parasite strain-dependent manner. Therefore, we studied the role of SLAMF1 by quantitative proteomics in a macrophage in vitro infection and the different responses between Y and VFRA strains of Trypanosoma cruzi. We detected different significant up- or downregulated proteins involved in immune regulation processes, which are SLAMF1 and/or strain-dependent. Furthermore, independently of SLAMF1, this parasite induces different responses in macrophages to counteract the infection and kill the parasite, such as type I and II IFN responses, NLRP3 inflammasome activation, IL-18 production, TLR7 and TLR9 activation specifically with the Y strain, and IL-11 signaling specifically with the VFRA strain. These results have opened new research fields to elucidate the concrete role of SLAMF1 and discover new potential therapeutic approaches for Chagas disease.
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Affiliation(s)
- Alfonso Herreros-Cabello
- Departamento de Biología Molecular, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), 28049 Madrid, Spain
| | - Javier Del Moral-Salmoral
- Departamento de Biología Molecular, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), 28049 Madrid, Spain
| | - Esperanza Morato
- Unidad de Proteómica, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), 28049 Madrid, Spain
| | - Anabel Marina
- Unidad de Proteómica, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), 28049 Madrid, Spain
- Unidad de Técnicas Bioanalíticas (BAT), Instituto de Investigación de Ciencias de la Alimentación (CIAL), Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), 28049 Madrid, Spain
| | - Beatriz Barrocal
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), 28049 Madrid, Spain
| | - Manuel Fresno
- Departamento de Biología Molecular, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), 28049 Madrid, Spain
- Instituto Universitario de Biología Molecular, Universidad Autónoma de Madrid (IUBM-UAM), 28049 Madrid, Spain
- Instituto de Investigación Sanitaria, Hospital Universitario de La Princesa, 28006 Madrid, Spain
| | - Núria Gironès
- Departamento de Biología Molecular, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), 28049 Madrid, Spain
- Instituto Universitario de Biología Molecular, Universidad Autónoma de Madrid (IUBM-UAM), 28049 Madrid, Spain
- Instituto de Investigación Sanitaria, Hospital Universitario de La Princesa, 28006 Madrid, Spain
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Pereira M, Ramalho T, Andrade WA, Durso DF, Souza MC, Fitzgerald KA, Golenbock DT, Silverman N, Gazzinelli RT. The IRAK1/IRF5 axis initiates IL-12 response by dendritic cells and control of Toxoplasma gondii infection. Cell Rep 2024; 43:113795. [PMID: 38367238 DOI: 10.1016/j.celrep.2024.113795] [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: 09/12/2023] [Revised: 12/19/2023] [Accepted: 01/30/2024] [Indexed: 02/19/2024] Open
Abstract
Activation of endosomal Toll-like receptor (TLR) 7, TLR9, and TLR11/12 is a key event in the resistance against the parasite Toxoplasma gondii. Endosomal TLR engagement leads to expression of interleukin (IL)-12 via the myddosome, a protein complex containing MyD88 and IL-1 receptor-associated kinase (IRAK) 4 in addition to IRAK1 or IRAK2. In murine macrophages, IRAK2 is essential for IL-12 production via endosomal TLRs but, surprisingly, Irak2-/- mice are only slightly susceptible to T. gondii infection, similar to Irak1-/- mice. Here, we report that upon T. gondii infection IL-12 production by different cell populations requires either IRAK1 or IRAK2, with conventional dendritic cells (DCs) requiring IRAK1 and monocyte-derived DCs (MO-DCs) requiring IRAK2. In both populations, we identify interferon regulatory factor 5 as the main transcription factor driving the myddosome-dependent IL-12 production during T. gondii infection. Consistent with a redundant role of DCs and MO-DCs, mutations that affect IL-12 production in both cell populations show high susceptibility to infection in vivo.
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Affiliation(s)
- Milton Pereira
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA.
| | - Theresa Ramalho
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Warrison A Andrade
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Danielle F Durso
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Maria C Souza
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Katherine A Fitzgerald
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Douglas T Golenbock
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Neal Silverman
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Ricardo T Gazzinelli
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA; Centro de Tecnologia de Vacinas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil.
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Silberstein E, Chung CC, Debrabant A. The transcriptome landscape of 3D-cultured placental trophoblasts reveals activation of TLR2 and TLR3/7 in response to low Trypanosoma cruzi parasite exposure. Front Microbiol 2023; 14:1256385. [PMID: 37799608 PMCID: PMC10548471 DOI: 10.3389/fmicb.2023.1256385] [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: 07/10/2023] [Accepted: 09/04/2023] [Indexed: 10/07/2023] Open
Abstract
Vertical transmission of Trypanosoma cruzi (T. cruzi) become a globalized health problem accounting for 22% of new cases of Chagas disease (CD). Congenital infection is now considered the main route of CD spread in non-endemic countries where no routine disease testing of pregnant women is implemented. The main mechanisms that lead to fetal infection by T. cruzi remain poorly understood. Mother-to-child transmission may occur when bloodstream trypomastigotes interact with the syncytiotrophoblasts (SYNs) that cover the placenta chorionic villi. These highly specialized cells function as a physical barrier and modulate immune responses against pathogen infections. To model the human placenta environment, we have previously used a three-dimensional (3D) cell culture system of SYNs that exhibits differentiation characteristics comparable to placental trophoblasts. Further, we have shown that 3D-grown SYNs are highly resistant to T. cruzi infection. In this work, we used RNA sequencing and whole transcriptome analysis to explore the immunological signatures that drive SYNs' infection control. We found that the largest category of differentially expressed genes (DEGs) are associated with inflammation and innate immunity functions. Quantitative RT-PCR evaluation of selected DEGs, together with detection of cytokines and chemokines in SYNs culture supernatants, confirmed the transcriptome data. Several genes implicated in the Toll-like receptors signaling pathways were upregulated in 3D-grown SYNs. In fact, TLR2 blockade and TLR3/7 knockdown stimulated T. cruzi growth, suggesting that these molecules play a significant role in the host cell response to infection. Ingenuity Pathway Analysis of DEGs predicted the activation of canonical pathways such as S100 protein family, pathogen induced cytokine storm, wound healing, HIF1α signaling and phagosome formation after T. cruzi exposure. Our findings indicate that SYNs resist infection by eliciting a constitutive pro-inflammatory response and modulating multiple defense mechanisms that interfere with the parasite's intracellular life cycle, contributing to parasite killing and infection control.
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Affiliation(s)
- Erica Silberstein
- Laboratory of Emerging Pathogens, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, United States
| | - Charles C. Chung
- High-performance Integrated Virtual Environment Team, Office of Biostatistics and Epidemiology, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, United States
| | - Alain Debrabant
- Laboratory of Emerging Pathogens, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, United States
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Youness A, Cenac C, Faz-López B, Grunenwald S, Barrat FJ, Chaumeil J, Mejía JE, Guéry JC. TLR8 escapes X chromosome inactivation in human monocytes and CD4 + T cells. Biol Sex Differ 2023; 14:60. [PMID: 37723501 PMCID: PMC10506212 DOI: 10.1186/s13293-023-00544-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 09/04/2023] [Indexed: 09/20/2023] Open
Abstract
BACKGROUND Human endosomal Toll-like receptors TLR7 and TLR8 recognize self and non-self RNA ligands, and are important mediators of innate immunity and autoimmune pathogenesis. TLR7 and TLR8 are, respectively, encoded by adjacent X-linked genes. We previously established that TLR7 evades X chromosome inactivation (XCI) in female immune cells. Whether TLR8 also evades XCI, however, has not yet been explored. METHOD In the current study, we used RNA fluorescence in situ hybridization (RNA FISH) to directly visualize, on a single-cell basis, primary transcripts of TLR7 and TLR8 relative to X chromosome territories in CD14+ monocytes and CD4+ T lymphocytes from women, Klinefelter syndrome (KS) men, and euploid men. To assign X chromosome territories in cells lacking robust expression of a XIST compartment, we designed probes specific for X-linked genes that do not escape XCI and therefore robustly label the active X chromosome. We also assessed whether XCI escape of TLR8 was associated with sexual dimorphism in TLR8 protein expression by western blot and flow cytometry. RESULTS Using RNA FISH, we show that TLR8, like TLR7, evades XCI in immune cells, and that cells harboring simultaneously TLR7 and TLR8 transcript foci are more frequent in women and KS men than in euploid men, resulting in a sevenfold difference in frequency. This transcriptional bias was again observable when comparing the single X of XY males with the active X of cells from females or KS males. Interestingly, TLR8 protein expression was significantly higher in female mononuclear blood cells, including all monocyte subsets, than in male cells. CONCLUSIONS TLR8, mirroring TLR7, escapes XCI in human monocytes and CD4+ T cells. Co-dependent transcription from the active X chromosome and escape from XCI could both contribute to higher TLR8 protein abundance in female cells, which may have implications for the response to viruses and bacteria, and the risk of developing inflammatory and autoimmune diseases.
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Affiliation(s)
- Ali Youness
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), UMR 1291 INSERM, CNRS, Hôpital Purpan, Université de Toulouse, 31024 Toulouse, France
| | - Claire Cenac
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), UMR 1291 INSERM, CNRS, Hôpital Purpan, Université de Toulouse, 31024 Toulouse, France
| | - Berenice Faz-López
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), UMR 1291 INSERM, CNRS, Hôpital Purpan, Université de Toulouse, 31024 Toulouse, France
| | - Solange Grunenwald
- Service d’Endocrinologie, Maladies Métaboliques et Nutrition, Hôpital Larrey, Centre Hospitalier Universitaire (CHU) de Toulouse, 31059 Toulouse, France
| | - Franck J. Barrat
- Hospital for Special Surgery, HSS Research Institute and David Z. Rosensweig Genomics Research Center, New York, NY 10021 USA
- Department of Microbiology and Immunology, Weill Cornell Medical College of Cornell University, New York, NY 10021 USA
| | - Julie Chaumeil
- INSERM, CNRS, Université Paris Cité, Institut Cochin, 75014 Paris, France
| | - José Enrique Mejía
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), UMR 1291 INSERM, CNRS, Hôpital Purpan, Université de Toulouse, 31024 Toulouse, France
| | - Jean-Charles Guéry
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), UMR 1291 INSERM, CNRS, Hôpital Purpan, Université de Toulouse, 31024 Toulouse, France
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Macaluso G, Grippi F, Di Bella S, Blanda V, Gucciardi F, Torina A, Guercio A, Cannella V. A Review on the Immunological Response against Trypanosoma cruzi. Pathogens 2023; 12:pathogens12020282. [PMID: 36839554 PMCID: PMC9964664 DOI: 10.3390/pathogens12020282] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/01/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
Chagas disease is a chronic systemic infection transmitted by Trypanosoma cruzi. Its life cycle consists of different stages in vector insects and host mammals. Trypanosoma cruzi strains cause different clinical manifestations of Chagas disease alongside geographic differences in morbidity and mortality. Natural killer cells provide the cytokine interferon-gamma in the initial phases of T. cruzi infection. Phagocytes secrete cytokines that promote inflammation and activation of other cells involved in defence. Dendritic cells, monocytes and macrophages modulate the adaptive immune response, and B lymphocytes activate an effective humoral immune response to T. cruzi. This review focuses on the main immune mechanisms acting during T. cruzi infection, on the strategies activated by the pathogen against the host cells, on the processes involved in inflammasome and virulence factors and on the new strategies for preventing, controlling and treating this disease.
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Vellasco L, Svensjö E, Bulant CA, Blanco PJ, Nogueira F, Domont G, de Almeida NP, Nascimento CR, Silva-dos-Santos D, Carvalho-Pinto CE, Medei EH, Almeida IC, Scharfstein J. Sheltered in Stromal Tissue Cells, Trypanosoma cruzi Orchestrates Inflammatory Neovascularization via Activation of the Mast Cell Chymase Pathway. Pathogens 2022; 11:pathogens11020187. [PMID: 35215131 PMCID: PMC8878313 DOI: 10.3390/pathogens11020187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 12/04/2022] Open
Abstract
Microangiopathy may worsen the clinical outcome of Chagas disease. Given the obstacles to investigating the dynamics of inflammation and angiogenesis in heart tissues parasitized by Trypanosoma cruzi, here we used intravital microscopy (IVM) to investigate microcirculatory alterations in the hamster cheek pouch (HCP) infected by green fluorescent protein-expressing T. cruzi (GFP-T. cruzi). IVM performed 3 days post-infection (3 dpi) consistently showed increased baseline levels of plasma extravasation. Illustrating the reciprocal benefits that microvascular leakage brings to the host-parasite relationship, these findings suggest that intracellular amastigotes, acting from inside out, stimulate angiogenesis while enhancing the delivery of plasma-borne nutrients and prosurvival factors to the infection foci. Using a computer-based analysis of images (3 dpi), we found that proangiogenic indexes were positively correlated with transcriptional levels of proinflammatory cytokines (pro-IL1β and IFN-γ). Intracellular GFP-parasites were targeted by delaying for 24 h the oral administration of the trypanocidal drug benznidazole. A classification algorithm showed that benznidazole (>24 h) blunted angiogenesis (7 dpi) in the HCP. Unbiased proteomics (3 dpi) combined to pharmacological targeting of chymase with two inhibitors (chymostatin and TY-51469) linked T. cruzi-induced neovascularization (7 dpi) to the proangiogenic activity of chymase, a serine protease stored in secretory granules from mast cells.
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Affiliation(s)
- Lucas Vellasco
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | - Erik Svensjö
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | - Carlos Alberto Bulant
- Department of Mathematical and Computational Methods, National Laboratory for Scientific Computing, Petrópolis 25651-075, Brazil; (C.A.B.); (P.J.B.)
| | - Pablo Javier Blanco
- Department of Mathematical and Computational Methods, National Laboratory for Scientific Computing, Petrópolis 25651-075, Brazil; (C.A.B.); (P.J.B.)
| | - Fábio Nogueira
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (F.N.); (G.D.); (N.P.d.A.)
| | - Gilberto Domont
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (F.N.); (G.D.); (N.P.d.A.)
| | - Natália Pinto de Almeida
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (F.N.); (G.D.); (N.P.d.A.)
| | - Clarissa Rodrigues Nascimento
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | - Danielle Silva-dos-Santos
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | | | - Emiliano Horácio Medei
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | - Igor C. Almeida
- Department of Biological Sciences, Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX 79968, USA;
| | - Julio Scharfstein
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
- Correspondence:
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The Oxidative Stress and Chronic Inflammatory Process in Chagas Disease: Role of Exosomes and Contributing Genetic Factors. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2021:4993452. [PMID: 34976301 PMCID: PMC8718323 DOI: 10.1155/2021/4993452] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/27/2021] [Accepted: 12/06/2021] [Indexed: 12/15/2022]
Abstract
Chagas disease is a neglected tropical disease caused by the flagellated protozoa Trypanosoma cruzi that affects several million people mainly in Latin American countries. Chagas disease has two phases, which are acute and chronic, both separated by an indeterminate time period in which the infected individual is relatively asymptomatic. The acute phase extends for 40-60 days with atypical and mild symptoms; however, about 30% of the infected patients will develop a symptomatic chronic phase, which is characterized by either cardiac, digestive, neurological, or endocrine problems. Cardiomyopathy is the most important and severe result of Chagas disease, which leads to left ventricular systolic dysfunction, heart failure, and sudden cardiac death. Most deaths are due to heart failure (70%) and sudden death (30%) resulting from cardiomyopathy. During the chronic phase, T. cruzi-infected macrophages respond with the production of proinflammatory cytokines and production of superoxide and nitric oxide by the NADPH oxidase 2 (NOX2) and inducible nitric oxide synthase (iNOS) enzymes, respectively. During the chronic phase, myocardial changes are produced as a result of chronic inflammation, oxidative stress, fibrosis, and cell death. The cellular inflammatory response is mainly the result of activation of the NF-κB-dependent pathway, which activates gene expression of inflammatory cytokines, leading to progressive tissue damage. The persisting production of reactive oxygen species (ROS) is the result of mitochondrial dysfunction in the cardiomyocytes. In this review, we will discuss inflammation and oxidative damage which is produced in the heart during the chronic phase of Chagas disease and recent evidence on the role of macrophages and the production of proinflammatory cytokines during the acute phase and the origin of macrophages/monocytes during the chronic phase of Chagas disease. We will also discuss the contributing factors and mechanisms leading to the chronic inflammation of the cardiac tissue during the chronic phase of the disease as well as the innate and adaptive host immune response. The contribution of genetic factors to the progression of the chronic inflammatory cardiomyopathy of chronic Chagas disease is also discussed. The secreted extracellular vesicles (exosomes) produced for both T. cruzi and infected host cells can play key roles in the host immune response, and those roles are described. Lastly, we describe potential treatments to attenuate the chronic inflammation of the cardiac tissue, designed to improve heart function in chagasic patients.
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Queiroga TBD, Pereira NDS, da Silva DD, Andrade CDM, de Araújo Júnior RF, Brito CRDN, Galvão LMDC, da Câmara ACJ, Nascimento MSL, Guedes PMM. Virulence of Trypanosoma cruzi Strains Is Related to the Differential Expression of Innate Immune Receptors in the Heart. Front Cell Infect Microbiol 2021; 11:696719. [PMID: 34336720 PMCID: PMC8321543 DOI: 10.3389/fcimb.2021.696719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 06/25/2021] [Indexed: 11/13/2022] Open
Abstract
Resistance or susceptibility to T. cruzi infection is dependent on the host immunological profile. Innate immune receptors, such as Toll-like receptors (TLRs/TLR2, TLR4, TLR7, and TLR9) and Nod-like receptors (NLRs/NOD1 and NLRP3 inflammasome) are involved with the resistance against acute experimental T. cruzi infection. Here, we evaluated the impact of T. cruzi virulence on the expression of innate immune receptors and its products in mice. For that, we used six T. cruzi strains/isolates that showed low (AM64/TcIV and 3253/Tc-V), medium (PL1.10.14/TcIII and CL/TcVI), or high (Colombian/Tc-I and Y/TcII) virulence and pathogenicity to the vertebrate host and belonging to the six discrete typing units (DTUs)—TcI to TcVI. Parasitemia, mortality, and myocarditis were evaluated and correlated to the expression of TLRs, NLRs, adapter molecules, cytokines, and iNOS in myocardium by real time PCR. Cytokines (IL-1β, IL-12, TNF-α, and IFN-γ) were quantified in sera 15 days after infection. Our data indicate that high virulent strains of T. cruzi, which generate high parasitemia, severe myocarditis, and 100% mortality in infected mice, inhibit the expression of TLR2, TLR4, TLR9, TRIF, and Myd88 transcripts, leading to a low IL-12 production, when compared to medium and low virulent T. cruzi strains. On the other hand, the high virulent T. cruzi strains induce the upregulation of NLRP3, caspase-1, IL-1β, TNF-α, and iNOS mRNA in heart muscle, compared to low and medium virulent strains, which may contribute to myocarditis and death. Moreover, high virulent strains induce higher levels of IL-1β and TNF-α in sera compared to less virulent parasites. Altogether the data indicate that differential TLR and NLR expression in heart muscle is correlated with virulence and pathogenicity of T cruzi strains. A better knowledge of the immunological mechanisms involved in resistance to T. cruzi infection is important to understand the natural history of Chagas disease, can lead to identification of immunological markers and/or to serve as a basis for alternative therapies.
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Affiliation(s)
| | - Nathalie de Sena Pereira
- Graduate Program Health and Biological Sciences, Federal University of Vale do São Francisco, Petrolina, Brazil
| | - Denis Dantas da Silva
- Graduate Program Parasitary Biology, Federal University of Rio Grande do Norte, Natal, Brazil
| | | | - Raimundo Fernandes de Araújo Júnior
- Laboratory of Investigation of the Inflammation and Cancer (LAICI)/Department of Morphology, Federal University of Rio Grande do Norte, Natal, Brazil
| | | | | | | | | | - Paulo Marcos Matta Guedes
- Department of Microbiology and Parasitology, Federal University of Rio Grande do Norte, Natal, Brazil
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Chen B, Gao L, Shang X. A two-way rectification method for identifying differentially expressed genes by maximizing the co-function relationship. BMC Genomics 2021; 22:471. [PMID: 34171992 PMCID: PMC8229713 DOI: 10.1186/s12864-021-07772-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 06/04/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND The identification of differentially expressed genes (DEGs) is an important task in many biological studies. The currently widely used methods often calculate a score for each gene by estimating the significance level in terms of the differential expression. However, biological experiments often have only three duplications, plus plenty of noises contain in gene expression datasets, which brings a great challenge to statistical analysis methods. Moreover, the abundance of gene expression levels are not evenly distributed. Thus, those low expressed genes are more easily to be detected by fold-change based methods, which may results in high false positives among the DEG list. Since phenotypical changes result from DEGs should be strongly related to several distinct cellular functions, a more robust method should be designed to increase the true positive rate of the functional related DEGs. RESULTS In this study, we propose a two-way rectification method for identifying DEGs by maximizing the co-function relationships between genes and their enriched cellular pathways. An iteration strategy is employed to sequentially narrow down the group of identified DEGs and their associated biological functions. Functional analyses reveal that the identified DEGs are well organized in the form of functional modules, and the enriched pathways are very significant with lower p-value and larger gene count. CONCLUSIONS An integrative rectification method was proposed to identify key DEGs and their related functions simultaneously. The experimental validations demonstrate that the method has high interpretability and feasibility. It performs very well in terms of the identification of remarkable functional related genes.
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Affiliation(s)
- Bolin Chen
- School of Computer Science, Northwestern Polytechnical University, 127 Youyi west road, Xi’an, 710072 China
- Key Laboratory of Big Data Storage and Management, Ministry of Industry and Information Technology, 127 Youyi west road, Xi’an, 710072 China
- Centre for Multidisciplinary Convergence Computing (CMCC), 127 Youyi west road, Xi’an, 710072 China
- National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology, 127 Youyi west road, Xi’an, 710072 China
| | - Li Gao
- School of Software, Northwestern Polytechnical University, 127 Youyi west road, Xi’an, 710072 China
| | - Xuequn Shang
- School of Computer Science, Northwestern Polytechnical University, 127 Youyi west road, Xi’an, 710072 China
- Key Laboratory of Big Data Storage and Management, Ministry of Industry and Information Technology, 127 Youyi west road, Xi’an, 710072 China
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10
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Donor UNC-93 Homolog B1 genetic polymorphism predicts survival outcomes after unrelated bone marrow transplantation. Genes Immun 2021; 22:35-43. [PMID: 33627833 PMCID: PMC7903020 DOI: 10.1038/s41435-021-00122-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 01/19/2021] [Accepted: 01/27/2021] [Indexed: 02/01/2023]
Abstract
UNC-93 homolog B1 (UNC93B1) is a key regulator of toll-like receptors (TLRs), pattern recognition receptors that sense invading pathogens and manage the innate immune response and deliver them from the endoplasmic reticulum to their respective endosomal signaling compartments. Several types of TLRs are known to contribute to the inflammatory process after allogeneic hematopoietic stem cell transplantation (SCT), so UNC93B1 might play integral roles there. We investigated the influence of the UNC93B1 single-nucleotide polymorphism (SNP) rs308328 (T>C) on transplant outcomes in a cohort of 237 patients undergoing unrelated HLA-matched bone marrow transplantation (BMT) for hematologic malignancies through the Japan Marrow Donor Program. The donor UNC93B1 C/C genotype was associated with a better 3-year overall survival than the donor UNC93B1 C/T or T/T genotype. An analysis of the UNC93B1 rs308328 genotype may therefore be useful for selecting the donor, estimating the prognosis, and creating therapeutic strategies after allogeneic SCT.
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11
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[The innate immune response to SARS-CoV-2]. Uirusu 2021; 71:33-40. [PMID: 35526992 DOI: 10.2222/jsv.71.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Pérez-Mazliah D, Ward AI, Lewis MD. Host-parasite dynamics in Chagas disease from systemic to hyper-local scales. Parasite Immunol 2020; 43:e12786. [PMID: 32799361 DOI: 10.1111/pim.12786] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 12/14/2022]
Abstract
Trypanosoma cruzi is a remarkably versatile parasite. It can parasitize almost any nucleated cell type and naturally infects hundreds of mammal species across much of the Americas. In humans, it is the cause of Chagas disease, a set of mainly chronic conditions predominantly affecting the heart and gastrointestinal tract, which can progress to become life threatening. Yet around two thirds of infected people are long-term asymptomatic carriers. Clinical outcomes depend on many factors, but the central determinant is the nature of the host-parasite interactions that play out over the years of chronic infection in diverse tissue environments. In this review, we aim to integrate recent developments in the understanding of the spatial and temporal dynamics of T. cruzi infections with established and emerging concepts in host immune responses in the corresponding phases and tissues.
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Affiliation(s)
- Damián Pérez-Mazliah
- York Biomedical Research Institute, Hull York Medical School, University of York, York, UK
| | - Alexander I Ward
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Michael D Lewis
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
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13
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Stögerer T, Stäger S. Innate Immune Sensing by Cells of the Adaptive Immune System. Front Immunol 2020; 11:1081. [PMID: 32547564 PMCID: PMC7274159 DOI: 10.3389/fimmu.2020.01081] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 05/05/2020] [Indexed: 01/05/2023] Open
Abstract
Sensing of microbes or of danger signals has mainly been attributed to myeloid innate immune cells. However, T and B cells also express functional pattern recognition receptors (PRRs). In these cells, PRRs mediate signaling cascades that result in different functions depending on the cell's activation and/or differentiation status, on the environment, and on the ligand/agonist. Some of these functions are beneficial for the host; however, some are detrimental and are exploited by pathogens to establish persistent infections. In this review, we summarize the available literature on innate immune sensing by cells of the adaptive immune system and discuss possible implications for chronic infections.
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Affiliation(s)
- Tanja Stögerer
- INRS Centre Armand-Frappier Santé Biotechnologie, Laval, QC, Canada
| | - Simona Stäger
- INRS Centre Armand-Frappier Santé Biotechnologie, Laval, QC, Canada
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14
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Tohme M, Maisonneuve L, Achour K, Dussiot M, Maschalidi S, Manoury B. TLR7 trafficking and signaling in B cells is regulated by the MHCII-associated invariant chain. J Cell Sci 2020; 133:jcs.236711. [PMID: 32079661 DOI: 10.1242/jcs.236711] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 02/04/2020] [Indexed: 11/20/2022] Open
Abstract
Toll-like receptor 7 (TLR7) is an endosomal receptor that recognizes single-stranded RNA from viruses. Its trafficking and activation is regulated by the endoplasmic reticulum (ER) chaperone UNC93B1 and lysosomal proteases. UNC93B1 also modulates major histocompatibility complex class II (MHCII) antigen presentation, and deficiency in MHCII protein diminishes TLR9 signaling. These results indicate a link between proteins that regulate both innate and adaptive responses. Here, we report that TLR7 resides in lysosomes and interacts with the MHCII-chaperone molecule, the invariant chain (Ii) or CD74, in B cells. In the absence of CD74, TLR7 displays both ER and lysosomal localization, leading to an increase in pro-inflammatory cytokine production. Furthermore, stimulation with TLR7 but not TLR9, is inefficient in boosting antigen presentation in Ii-deficient cells. In contrast, in B cells lacking TLR7 or mutated for UNC93B1, which are able to trigger TLR7 activation, antigen presentation is enhanced. This suggests that TLR7 signaling in B cells is controlled by the Ii chain.
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Affiliation(s)
- Mira Tohme
- Nkarta Therapeutics, South San Fransisco, CA 94080, USA
| | - Lucie Maisonneuve
- Institut Necker Enfant Malade, INSERM U1151-CNRS UMR 8253, 75015 Paris, France.,Université de Paris, Faculté de médecine, 75015 Paris, France
| | - Karim Achour
- Institut de recherche Servier, 3 rue de la république, 92150 Suresnes, France
| | - Michaël Dussiot
- Institut Imagine, INSERM U1163, CNRS ERL 8254, Université Paris Descartes, Sorbonne Paris-Cité, Laboratoire d'Excellence GR-Ex, 75015 Paris, France
| | - Sophia Maschalidi
- VIB-UGent Center for Inflammation Research, UGent-VIB Research Building FSVM, Technologiepark 71, 9052 Ghent, Belgium
| | - Bénédicte Manoury
- Institut Necker Enfant Malade, INSERM U1151-CNRS UMR 8253, 75015 Paris, France .,Université de Paris, Faculté de médecine, 75015 Paris, France
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15
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Chevillard C, Nunes JPS, Frade AF, Almeida RR, Pandey RP, Nascimento MS, Kalil J, Cunha-Neto E. Disease Tolerance and Pathogen Resistance Genes May Underlie Trypanosoma cruzi Persistence and Differential Progression to Chagas Disease Cardiomyopathy. Front Immunol 2018; 9:2791. [PMID: 30559742 PMCID: PMC6286977 DOI: 10.3389/fimmu.2018.02791] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Accepted: 11/13/2018] [Indexed: 01/01/2023] Open
Abstract
Chagas disease is caused by infection with the protozoan Trypanosoma cruzi and affects over 8 million people worldwide. In spite of a powerful innate and adaptive immune response in acute infection, the parasite evades eradication, leading to a chronic persistent infection with low parasitism. Chronically infected subjects display differential patterns of disease progression. While 30% develop chronic Chagas disease cardiomyopathy (CCC)—a severe inflammatory dilated cardiomyopathy—decades after infection, 60% of the patients remain disease-free, in the asymptomatic/indeterminate (ASY) form, and 10% develop gastrointestinal disease. Infection of genetically deficient mice provided a map of genes relevant for resistance to T. cruzi infection, leading to the identification of multiple genes linked to survival to infection. These include pathogen resistance genes (PRG) needed for intracellular parasite destruction, and genes involved in disease tolerance (protection against tissue damage and acute phase death—DTG). All identified DTGs were found to directly or indirectly inhibit IFN-γ production or Th1 differentiation. We hypothesize that the absolute need for DTG to control potentially lethal IFN-γ PRG activity leads to T. cruzi persistence and establishment of chronic infection. IFN-γ production is higher in CCC than ASY patients, and is the most highly expressed cytokine in CCC hearts. Key DTGs that downmodulate IFN-γ, like IL-10, and Ebi3/IL27p28, are higher in ASY patients. Polymorphisms in PRG and DTG are associated with differential disease progression. We thus hypothesize that ASY patients are disease tolerant, while an imbalance of DTG and IFN-γ PRG activity leads to the inflammatory heart damage of CCC.
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Affiliation(s)
| | - João Paulo Silva Nunes
- Laboratorio de Imunologia, Instituto do Coracao, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Disciplina de Imunologia Clínica e Alergia, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Institute for Investigation in Immunology (iii), INCT, São Paulo, Brazil
| | - Amanda Farage Frade
- Laboratorio de Imunologia, Instituto do Coracao, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Institute for Investigation in Immunology (iii), INCT, São Paulo, Brazil.,Department of Bioengineering, Brazil University, São Paulo, Brazil
| | - Rafael Ribeiro Almeida
- Laboratorio de Imunologia, Instituto do Coracao, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Disciplina de Imunologia Clínica e Alergia, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Institute for Investigation in Immunology (iii), INCT, São Paulo, Brazil
| | - Ramendra Pati Pandey
- Laboratorio de Imunologia, Instituto do Coracao, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Disciplina de Imunologia Clínica e Alergia, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Institute for Investigation in Immunology (iii), INCT, São Paulo, Brazil
| | - Marilda Savóia Nascimento
- Laboratorio de Imunologia, Instituto do Coracao, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Disciplina de Imunologia Clínica e Alergia, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Institute for Investigation in Immunology (iii), INCT, São Paulo, Brazil
| | - Jorge Kalil
- Laboratorio de Imunologia, Instituto do Coracao, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Disciplina de Imunologia Clínica e Alergia, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Institute for Investigation in Immunology (iii), INCT, São Paulo, Brazil
| | - Edecio Cunha-Neto
- Laboratorio de Imunologia, Instituto do Coracao, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Disciplina de Imunologia Clínica e Alergia, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, Brazil.,Institute for Investigation in Immunology (iii), INCT, São Paulo, Brazil
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16
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Acevedo GR, Girard MC, Gómez KA. The Unsolved Jigsaw Puzzle of the Immune Response in Chagas Disease. Front Immunol 2018; 9:1929. [PMID: 30197647 PMCID: PMC6117404 DOI: 10.3389/fimmu.2018.01929] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 08/06/2018] [Indexed: 12/26/2022] Open
Abstract
Trypanosoma cruzi interacts with the different arms of the innate and adaptive host's immune response in a very complex and flowery manner. The history of host-parasite co-evolution has provided this protozoan with means of resisting, escaping or subverting the mechanisms of immunity and establishing a chronic infection. Despite many decades of research on the subject, the infection remains incurable, and the factors that steer chronic Chagas disease from an asymptomatic state to clinical onset are still unclear. As the relationship between T. cruzi and the host immune system is intricate, so is the amount and diversity of scientific knowledge on the matter. Many of the mechanisms of immunity are fairly well understood, but unveiling the factors that lead each of these to success or failure, within the coordinated response as a whole, requires further research. The intention behind this Review is to compile the available information on the different aspects of the immune response, with an emphasis on those phenomena that have been studied and confirmed in the human host. For ease of comprehension, it has been subdivided in sections that cover the main humoral and cell-mediated components involved therein. However, we also intend to underline that these elements are not independent, but function intimately and concertedly. Here, we summarize years of investigation carried out to unravel the puzzling interplay between the host and the parasite.
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Affiliation(s)
| | | | - Karina A. Gómez
- Laboratorio de Inmunología de las Infecciones por Tripanosomátidos, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular (INGEBI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
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17
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Santana DY, Salgado RM, Fevereiro M, Silva do Nascimento R, Fonseca R, Saraiva Câmara NO, Epiphanio S, Marinho CRF, Barreto-Chaves ML, D’ Império-Lima MR, Álvarez JM. MyD88 activation in cardiomyocytes contributes to the heart immune response to acute Trypanosoma cruzi infection with no effect on local parasite control. PLoS Negl Trop Dis 2018; 12:e0006617. [PMID: 30067739 PMCID: PMC6089445 DOI: 10.1371/journal.pntd.0006617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 08/13/2018] [Accepted: 06/18/2018] [Indexed: 12/15/2022] Open
Abstract
Cardiomyopathy is the most serious consequence of Chagas disease, a neglected human disorder caused by Trypanosoma cruzi infection. Because T. cruzi parasites invade cardiomyocytes, we sought to investigate whether these cells recognize the parasite in vivo by receptors signaling through the MyD88 adaptor, which mediates the activation pathway of most Toll-like receptors (TLRs) and IL-1/IL-18 receptors, and influence the development of acute cardiac pathology. First, we showed that HL-1 cardiac muscle cell line expresses MyD88 gene and protein at resting state and after T. cruzi infection. To evaluate the role in vivo of MyD88 expression in cardiomyocytes, we generated Mer+MyD88flox+/+ mice in which tamoxifen treatment is expected to eliminate the MyD88 gene exclusively in cardiomyocytes. This Cre-loxP model was validated by both PCR and western blot analysis; tamoxifen treatment of Mer+MyD88flox+/+ mice resulted in decreased MyD88 gene and protein expression in the heart, but not in the spleen, while had no effect on littermates. The elimination of MyD88 in cardiomyocytes determined a lower increase in CCL5, IFNγ and TNFα gene transcription during acute infection by T. cruzi parasites of the Y strain, but it did not significantly modify heart leukocyte infiltration and parasitism. Together, our results show that cardiomyocytes can sense T. cruzi infection through MyD88-mediated molecular pathways and contribute to the local immune response to the parasite. The strong pro-inflammatory response of heart-recruited leukocytes may overshadow the effects of MyD88 deficiency in cardiomyocytes on the local leukocyte recruitment and T. cruzi control during acute infection.
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Affiliation(s)
- Danni Yohani Santana
- Department of Immunology of Biomedical Sciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Rafael Moysés Salgado
- Department of Immunology of Biomedical Sciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Marina Fevereiro
- Department of Anatomy of Biomedical Sciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | | | - Raissa Fonseca
- Department of Immunology of Biomedical Sciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Niels Olsen Saraiva Câmara
- Department of Immunology of Biomedical Sciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Sabrina Epiphanio
- Department of Clinical and Toxicologic Analyses, Faculty of Pharmacy, University of São Paulo, São Paulo, SP, Brazil
| | | | | | | | - José M. Álvarez
- Department of Immunology of Biomedical Sciences Institute, University of São Paulo, São Paulo, SP, Brazil
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18
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Tsatsaronis JA, Franch-Arroyo S, Resch U, Charpentier E. Extracellular Vesicle RNA: A Universal Mediator of Microbial Communication? Trends Microbiol 2018; 26:401-410. [PMID: 29548832 DOI: 10.1016/j.tim.2018.02.009] [Citation(s) in RCA: 134] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 02/08/2018] [Accepted: 02/14/2018] [Indexed: 01/18/2023]
Abstract
Both extracellular RNAs and extracellular vesicles (EVs) have recently garnered attention as novel mediators of intercellular communication in eukaryotes and prokaryotes alike. EVs not only permit export of RNA, but also facilitate delivery and trans-kingdom exchange of these and other biomolecules, for instance between microbes and their hosts. In this Opinion article, we propose that EV-mediated export of RNA represents a universal mechanism for interkingdom and intrakingdom communication that is conserved among bacterial, archaeal, and eukaryotic microbes. We speculate how microbes might use EV RNA to influence target cell gene expression or manipulate host immune responses.
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Affiliation(s)
- James A Tsatsaronis
- Department of Regulation in Infection Biology, Max Planck Institute for Infection Biology, 10117 Berlin, Germany; Current address: School of Biological Sciences, University of Wollongong, 2522 Wollongong, Australia; Both authors contributed equally to this work
| | - Sandra Franch-Arroyo
- Department of Regulation in Infection Biology, Max Planck Institute for Infection Biology, 10117 Berlin, Germany; Both authors contributed equally to this work
| | - Ulrike Resch
- Department of Regulation in Infection Biology, Max Planck Institute for Infection Biology, 10117 Berlin, Germany
| | - Emmanuelle Charpentier
- Department of Regulation in Infection Biology, Max Planck Institute for Infection Biology, 10117 Berlin, Germany; The Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå Centre for Microbial Research (UCMR), Department of Molecular Biology, Umeå University, 90187 Umeå, Sweden; Institute for Biology, Humboldt University, 10115 Berlin, Germany.
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19
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Liu W, Huang L, Wei Q, Zhang Y, Zhang S, Zhang W, Cai L, Liang S. Microarray analysis of long non-coding RNA expression profiles uncovers a Toxoplasma-induced negative regulation of host immune signaling. Parasit Vectors 2018. [PMID: 29530077 PMCID: PMC5848448 DOI: 10.1186/s13071-018-2697-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Toxoplasma gondii is an obligate intracellular protozoan parasite that can infect mammalian cells and thereby regulate host gene expression. The long non-coding RNAs (lncRNAs) have been demonstrated to be an important class of RNA molecules that regulate many biological processes, including host-pathogen interactions. However, the role of host lncRNAs in the response to T. gondii infection remains largely unknown. METHODS We applied a microarray approach to determine the differential expression profiles of both lncRNAs and mRNAs in the human foreskin fibroblast (HFF) cells after T. gondii infection. The Gene Ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses were performed to reveal the potential functions of T. gondii-induced genes. Based on the co-expression networks of lncRNAs and immune-related genes, the role of NONSHAT022487 on the regulation of UNC93B1 related immune signaling was investigated by the knockdown and over-expression of lncRNA in human macrophage derived from the PMA-induced promonocytic cell line THP-1. RESULTS Our data showed that 996 lncRNAs and 109 mRNAs in HFF cells were significantly and differentially expressed following T. gondii infection (fold change ≥ 5, P < 0.05). The results from the GO and KEGG pathway analyses indicated that the mRNAs with differential expression were mainly involved in the host immune response. Remarkably, we identified a novel lncRNA, NONSHAT022487, which suppresses the expression of the immune-related molecule UNC93B1. After T. gondii infection, NONSHAT022487 impaired the secretion of the cytokines IL-12, TNF-α, IL-1β and IFN-γ by downregulating UNC93B1 expression in human macrophage cells. CONCLUSIONS Our study identified infection-induced lncRNA expression as a novel mechanism by which the Toxoplasma parasite regulates host immune signaling, which advances our understanding of the interaction of T. gondii parasites and host cells.
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Affiliation(s)
- Wenquan Liu
- Department of Parasitology, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Liyang Huang
- Department of Parasitology, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Qimei Wei
- Department of Parasitology, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Yu Zhang
- Department of Parasitology, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Shengnan Zhang
- Department of Parasitology, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Wenting Zhang
- Department of Parasitology, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Liya Cai
- Department of Parasitology, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Shaohui Liang
- Department of Parasitology, Wenzhou Medical University, Wenzhou, Zhejiang Province, China.
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20
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Lopez M, Tanowitz HB, Garg NJ. Pathogenesis of Chronic Chagas Disease: Macrophages, Mitochondria, and Oxidative Stress. CURRENT CLINICAL MICROBIOLOGY REPORTS 2018; 5:45-54. [PMID: 29868332 PMCID: PMC5983038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE OF REVIEW Trypanosoma cruzi is the causative agent of Chagas disease. Decades after initial infection, ~30% of individuals can develop chronic chagasic cardiomyopathy. There are several proposed mechanisms for pathogenesis of Chagas disease, including parasite persistence, immune responses against parasite or self that continue in the heart, vascular compromise, and involvement of autonomous and central nervous system. Herein, we will focus on the significance of macrophages, mitochondrial dysfunction, and oxidative stress in progression of chagasic cardiomyopathy. RECENT FINDINGS The current literature suggests that T. cruzi prevents cytotoxic activities of the innate immune cells and persists in the host, contributing to mitochondrial oxidative stress. We discuss how the neoantigens generated due to cellular oxidative damage contribute to chronic inflammatory stress in chagasic disease. SUMMARY We propose that metabolic regulators, PARP-1/SIRT1, determine the disease outcome by modulating the mitochondrial and macrophage stress and antioxidant/oxidant imbalance, and offer a potential new therapy against chronic Chagas disease.
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Affiliation(s)
- Marcos Lopez
- Translational Biomedical Research Group, Fundación Cardiovascular de Colombia, Floridablanca, Colombia and Graduate Program in Biomedical Sciencies, Faculty of Health, Universidad del Valle, Cali, Colombia
| | - Herbert B Tanowitz
- Departments of Pathology and Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - Nisha J Garg
- Departments of Microbiology and Immunology and Pathology, Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas 77555-1070
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21
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Lopez M, Tanowitz HB, Garg NJ. Pathogenesis of Chronic Chagas Disease: Macrophages, Mitochondria, and Oxidative Stress. CURRENT CLINICAL MICROBIOLOGY REPORTS 2018. [DOI: 10.1007/s40588-018-0081-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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22
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Mohammed I, Said DG, Dua HS. Human antimicrobial peptides in ocular surface defense. Prog Retin Eye Res 2017; 61:1-22. [DOI: 10.1016/j.preteyeres.2017.03.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/22/2017] [Accepted: 03/27/2017] [Indexed: 01/17/2023]
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23
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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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Nascimento CR, Andrade D, Carvalho-Pinto CE, Serra RR, Vellasco L, Brasil G, Ramos-Junior ES, da Mota JB, Almeida LN, Andrade MV, Correia Soeiro MDN, Juliano L, Alvarenga PH, Oliveira AC, Sicuro FL, de Carvalho ACC, Svensjö E, Scharfstein J. Mast Cell Coupling to the Kallikrein-Kinin System Fuels Intracardiac Parasitism and Worsens Heart Pathology in Experimental Chagas Disease. Front Immunol 2017; 8:840. [PMID: 28824610 PMCID: PMC5539176 DOI: 10.3389/fimmu.2017.00840] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 07/04/2017] [Indexed: 02/05/2023] Open
Abstract
During the course of Chagas disease, infectious forms of Trypanosoma cruzi are occasionally liberated from parasitized heart cells. Studies performed with tissue culture trypomastigotes (TCTs, Dm28c strain) demonstrated that these parasites evoke neutrophil/CXCR2-dependent microvascular leakage by activating innate sentinel cells via toll-like receptor 2 (TLR2). Upon plasma extravasation, proteolytically derived kinins and C5a stimulate immunoprotective Th1 responses via cross-talk between bradykinin B2 receptors (B2Rs) and C5aR. Awareness that TCTs invade cardiovascular cells in vitro via interdependent activation of B2R and endothelin receptors [endothelin A receptor (ETAR)/endothelin B receptor (ETBR)] led us to hypothesize that T. cruzi might reciprocally benefit from the formation of infection-associated edema via activation of kallikrein-kinin system (KKS). Using intravital microscopy, here we first examined the functional interplay between mast cells (MCs) and the KKS by topically exposing the hamster cheek pouch (HCP) tissues to dextran sulfate (DXS), a potent "contact" activator of the KKS. Surprisingly, although DXS was inert for at least 30 min, a subtle MC-driven leakage resulted in factor XII (FXII)-dependent activation of the KKS, which then amplified inflammation via generation of bradykinin (BK). Guided by this mechanistic insight, we next exposed TCTs to "leaky" HCP-forged by low dose histamine application-and found that the proinflammatory phenotype of TCTs was boosted by BK generated via the MC/KKS pathway. Measurements of footpad edema in MC-deficient mice linked TCT-evoked inflammation to MC degranulation (upstream) and FXII-mediated generation of BK (downstream). We then inoculated TCTs intracardiacally in mice and found a striking decrease of parasite DNA (quantitative polymerase chain reaction; 3 d.p.i.) in the heart of MC-deficient mutant mice. Moreover, the intracardiac parasite load was significantly reduced in WT mice pretreated with (i) cromoglycate (MC stabilizer) (ii) infestin-4, a specific inhibitor of FXIIa (iii) HOE-140 (specific antagonist of B2R), and (iv) bosentan, a non-selective antagonist of ETAR/ETBR. Notably, histopathology of heart tissues from mice pretreated with these G protein-coupled receptors blockers revealed that myocarditis and heart fibrosis (30 d.p.i.) was markedly and redundantly attenuated. Collectively, our study suggests that inflammatory edema propagated via activation of the MC/KKS pathway fuels intracardiac parasitism by generating infection-stimulatory peptides (BK and endothelins) in the edematous heart tissues.
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Affiliation(s)
- Clarissa R. Nascimento
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Daniele Andrade
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | | | - Rafaela Rangel Serra
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Lucas Vellasco
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Guilherme Brasil
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Erivan Schnaider Ramos-Junior
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- University of the Pacific, San Francisco, CA, United States
| | - Julia Barbalho da Mota
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Larissa Nogueira Almeida
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Marcus V. Andrade
- Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Departamento de Clinica Medica, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | | | - Luiz Juliano
- Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | - Patrícia Hessab Alvarenga
- Instituto de Bioquímica Médica Leopoldo de Meis (IBqM), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana Carolina Oliveira
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Fernando Lencastre Sicuro
- Universidade do Estado do Rio de Janeiro (UERJ), Centro Biomédico Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Erik Svensjö
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Julio Scharfstein
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- *Correspondence: Julio Scharfstein,
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Chowdhury IH, Koo SJ, Gupta S, Liang LY, Bahar B, Silla L, Nuñez-Burgos J, Barrientos N, Zago MP, Garg NJ. Gene Expression Profiling and Functional Characterization of Macrophages in Response to Circulatory Microparticles Produced during Trypanosoma cruzi Infection and Chagas Disease. J Innate Immun 2016; 9:203-216. [PMID: 27902980 DOI: 10.1159/000451055] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 09/27/2016] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Chronic inflammation and oxidative stress are hallmarks of chagasic cardiomyopathy (CCM). In this study, we determined if microparticles (MPs) generated during Trypanosoma cruzi (Tc) infection carry the host's signature of the inflammatory/oxidative state and provide information regarding the progression of clinical disease. METHODS MPs were harvested from supernatants of human peripheral blood mononuclear cells in vitro incubated with Tc (control: LPS treated), plasma of seropositive humans with a clinically asymptomatic (CA) or symptomatic (CS) disease state (vs. normal/healthy [NH] controls), and plasma of mice immunized with a protective vaccine before challenge infection (control: unvaccinated/infected). Macrophages (mφs) were incubated with MPs, and we probed the gene expression profile using the inflammatory signaling cascade and cytokine/chemokine arrays, phenotypic markers of mφ activation by flow cytometry, cytokine profile by means of an ELISA and Bioplex assay, and oxidative/nitrosative stress and mitotoxicity by means of colorimetric and fluorometric assays. RESULTS Tc- and LPS-induced MPs stimulated proliferation, inflammatory gene expression profile, and nitric oxide (∙NO) release in human THP-1 mφs. LPS-MPs were more immunostimulatory than Tc-MPs. Endothelial cells, T lymphocytes, and mφs were the major source of MPs shed in the plasma of chagasic humans and experimentally infected mice. The CS and CA (vs. NH) MPs elicited >2-fold increase in NO and mitochondrial oxidative stress in THP-1 mφs; however, CS (vs. CA) MPs elicited a more pronounced and disease-state-specific inflammatory gene expression profile (IKBKB, NR3C1, and TIRAP vs. CCR4, EGR2, and CCL3), cytokine release (IL-2 + IFN-γ > GCSF), and surface markers of mφ activation (CD14 and CD16). The circulatory MPs of nonvaccinated/infected mice induced 7.5-fold and 40% increases in ∙NO and IFN-γ production, respectively, while these responses were abolished when RAW264.7 mφs were incubated with circulatory MPs of vaccinated/infected mice. CONCLUSION Circulating MPs reflect in vivo levels of an oxidative, nitrosative, and inflammatory state, and have potential utility in evaluating disease severity and the efficacy of vaccines and drug therapies against CCM.
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Affiliation(s)
- Imran H Chowdhury
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, TX, USA
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26
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Gravina HD, Goes AM, Murta SMF, Ropert C. MyD88 Adapter-like (Mal)/TIRAP Is Required for Cytokine Production by Splenic Ly6CloTLR2hi but Not by Ly6ChiTLR2hi Monocytes during Trypanosoma cruzi Infection. J Biol Chem 2016; 291:23832-23841. [PMID: 27646001 DOI: 10.1074/jbc.m116.729509] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Indexed: 01/13/2023] Open
Abstract
This study continues to explore the plasticity of Toll-like receptor 2 (TLR2) previously described in immune response during Trypanosoma cruzi infection. Here, we have shown that Ly6ChiTLR2hi monocytes were involved in TNF-α and IL-12 production, whereas Ly6CloTLR2hi monocytes were mainly committed to IL-10 and TNF-α production during T. cruzi infection independently of TLR agonist used (i.e. TLR2 or TLR9 agonists). Another difference between the monocyte populations is that the adapter Mal (encoded by TIRAP) has appeared crucial for the cytokine production by Ly6Clo but not by Ly6Chi monocytes. The protein Mal was necessary to induce cytokine synthesis by Ly6Clo monocytes after triggering TLR2 or TLR9. Finally, our data have suggested that TLR2, TLR9, and Mal/TIRAP controlled differentially the emergence of the different TLR2hi monocyte populations in the spleen. In summary, this study highlights the central role of the TLR2/Mal tandem in the distinct activity among the monocyte subsets during T. cruzi infection. Such findings provide a basis for understanding the challenge posed by the use of TLR2 agonist in immunotherapy.
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Affiliation(s)
- Humberto Doriguêtto Gravina
- From the Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, 31270-910 Belo Horizonte, Minas Gerais, Brazil and
| | - Alfredo Miranda Goes
- From the Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, 31270-910 Belo Horizonte, Minas Gerais, Brazil and
| | | | - Catherine Ropert
- From the Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, 31270-910 Belo Horizonte, Minas Gerais, Brazil and
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27
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Gil-Jaramillo N, Motta FN, Favali CBF, Bastos IMD, Santana JM. Dendritic Cells: A Double-Edged Sword in Immune Responses during Chagas Disease. Front Microbiol 2016; 7:1076. [PMID: 27471496 PMCID: PMC4943928 DOI: 10.3389/fmicb.2016.01076] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 06/27/2016] [Indexed: 01/24/2023] Open
Abstract
Dendritic cells (DCs) are the most important member of the antigen presenting cells group due to their ability to recognize antigen at the infection site and their high specialized antigen internalization capacity. These cells have central role in connecting the innate and adaptive immune responses against Trypanosoma cruzi, the causative agent of Chagas disease. These first line defense cells modulate host immune response depending on type, maturation level, cytokine milieu and DC receptor involved in the interactions with T. cruzi, influencing the development of the disease clinic forms. Here, we present a review of DCs-T. cruzi interactions both in human and murine models, pointing out the parasite ability to manipulate DCs activity for the purpose of evading innate immune response and assuring its own survival and persistence.
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Affiliation(s)
- Natalia Gil-Jaramillo
- Laboratório de Interação Patógeno-Hospedeiro, Instituto de Biologia, Universidade de BrasíliaBrasília, Brazil
| | - Flávia N. Motta
- Laboratório de Interação Patógeno-Hospedeiro, Instituto de Biologia, Universidade de BrasíliaBrasília, Brazil
- Faculdade de Ceilândia, Universidade de BrasíliaBrasília, Brazil
| | - Cecília B. F. Favali
- Laboratório de Biologia do Gene, Instituto de Biologia, Universidade de BrasíliaBrasília, Brazil
| | - Izabela M. D. Bastos
- Laboratório de Interação Patógeno-Hospedeiro, Instituto de Biologia, Universidade de BrasíliaBrasília, Brazil
| | - Jaime M. Santana
- Laboratório de Interação Patógeno-Hospedeiro, Instituto de Biologia, Universidade de BrasíliaBrasília, Brazil
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28
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Ersching J, Vasconcelos JR, Ferreira CP, Caetano BC, Machado AV, Bruna–Romero O, Baron MA, Ferreira LRP, Cunha-Neto E, Rock KL, Gazzinelli RT, Rodrigues MM. The Combined Deficiency of Immunoproteasome Subunits Affects Both the Magnitude and Quality of Pathogen- and Genetic Vaccination-Induced CD8+ T Cell Responses to the Human Protozoan Parasite Trypanosoma cruzi. PLoS Pathog 2016; 12:e1005593. [PMID: 27128676 PMCID: PMC4851296 DOI: 10.1371/journal.ppat.1005593] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 04/01/2016] [Indexed: 11/18/2022] Open
Abstract
The β1i, β2i and β5i immunoproteasome subunits have an important role in defining the repertoire of MHC class I-restricted epitopes. However, the impact of combined deficiency of the three immunoproteasome subunits in the development of protective immunity to intracellular pathogens has not been investigated. Here, we demonstrate that immunoproteasomes play a key role in host resistance and genetic vaccination-induced protection against the human pathogen Trypanosoma cruzi (the causative agent of Chagas disease), immunity to which is dependent on CD8+ T cells and IFN-γ (the classical immunoproteasome inducer). We observed that infection with T. cruzi triggers the transcription of immunoproteasome genes, both in mice and humans. Importantly, genetically vaccinated or T. cruzi-infected β1i, β2i and β5i triple knockout (TKO) mice presented significantly lower frequencies and numbers of splenic CD8+ effector T cells (CD8+CD44highCD62Llow) specific for the previously characterized immunodominant (VNHRFTLV) H-2Kb-restricted T. cruzi epitope. Not only the quantity, but also the quality of parasite-specific CD8+ T cell responses was altered in TKO mice. Hence, the frequency of double-positive (IFN-γ+/TNF+) or single-positive (IFN-γ+) cells specific for the H-2Kb-restricted immunodominant as well as subdominant T. cruzi epitopes were higher in WT mice, whereas TNF single-positive cells prevailed among CD8+ T cells from TKO mice. Contrasting with their WT counterparts, TKO animals were also lethally susceptible to T. cruzi challenge, even after an otherwise protective vaccination with DNA and adenoviral vectors. We conclude that the immunoproteasome subunits are key determinants in host resistance to T. cruzi infection by influencing both the magnitude and quality of CD8+ T cell responses. CD8+ t lymphocytes are cells of the immune system that mediate control of intracellular infections by viruses, prokaryote as well as eukaryote pathogens. To confer protection, these lymphocytes need to be elicited by pathogen peptides that are presented in association with MHC class I molecules. The degradation of self and microbial proteins by catalytic domains of the cytosolic proteasome β1, β2 and β5 subunits is intimately linked to the generation of MHC class I-restricted epitopes, which in turn are important determinants of the kinetics, specificity and efficiency of CD8+ T cell-mediated immunity. Importantly, inflammatory stimuli trigger the expression of the inducible alternative β1i, β2i and β5i subunits that form the immunoproteasomes. The qualitative and quantitative importance of immunoproteasomes in generating CD8+ T cell epitopes has recently been demonstrated in mice that are simultaneously devoid of the β1i, β2i and β5i subunits. In this study, we explored the role of immunoproteasomes in host resistance to Trypanosoma cruzi, a protozoan parasite that causes Chagas disease. We found that β1i, β2i and β5i triply deficient mice have an impaired response of CD8+ T cells and are highly susceptible to primary infection with T. cruzi. We also demonstrated that host resistance induced by a genetic vaccine able to protect normal mice from T. cruzi challenge fails to do so in the immunoproteasome-deficient mice. Our study provides strong evidences that β1i, β2i and β5i immunoproteasome subunits are important determinants of both the magnitude and quality of CD8+ T cell responses as well as immune-mediated host resistance to a human pathogen.
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Affiliation(s)
- Jonatan Ersching
- Centro de Terapia Celular e Molecular and Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo - Escola Paulista de Medicina, São Paulo, São Paulo, Brazil
| | - José R. Vasconcelos
- Centro de Terapia Celular e Molecular and Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo - Escola Paulista de Medicina, São Paulo, São Paulo, Brazil
- Departamento de Biociências, Universidade Federal de São Paulo, Santos, São Paulo, Brazil
| | - Camila P. Ferreira
- Centro de Terapia Celular e Molecular and Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo - Escola Paulista de Medicina, São Paulo, São Paulo, Brazil
| | - Braulia C. Caetano
- Departments of Medicine and Pathology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | | | - Oscar Bruna–Romero
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Monique A. Baron
- Instituto do Coração (InCor), Faculdade de Medicina - Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Ludmila R. P. Ferreira
- Instituto do Coração (InCor), Faculdade de Medicina - Universidade de São Paulo, São Paulo, São Paulo, Brazil
- Universidade Santo Amaro, São Paulo, São Paulo, Brazil
| | - Edécio Cunha-Neto
- Instituto do Coração (InCor), Faculdade de Medicina - Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Kenneth L. Rock
- Departments of Medicine and Pathology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Ricardo T. Gazzinelli
- Departments of Medicine and Pathology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
- Centro de Pesquisas René Rachou, FIOCRUZ, Belo Horizonte, Minas Gerais, Brazil
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
| | - Maurício M. Rodrigues
- Centro de Terapia Celular e Molecular and Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo - Escola Paulista de Medicina, São Paulo, São Paulo, Brazil
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29
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Li Y, Shah-Simpson S, Okrah K, Belew AT, Choi J, Caradonna KL, Padmanabhan P, Ndegwa DM, Temanni MR, Corrada Bravo H, El-Sayed NM, Burleigh BA. Transcriptome Remodeling in Trypanosoma cruzi and Human Cells during Intracellular Infection. PLoS Pathog 2016; 12:e1005511. [PMID: 27046031 PMCID: PMC4821583 DOI: 10.1371/journal.ppat.1005511] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 02/28/2016] [Indexed: 01/22/2023] Open
Abstract
Intracellular colonization and persistent infection by the kinetoplastid protozoan parasite, Trypanosoma cruzi, underlie the pathogenesis of human Chagas disease. To obtain global insights into the T. cruzi infective process, transcriptome dynamics were simultaneously captured in the parasite and host cells in an infection time course of human fibroblasts. Extensive remodeling of the T. cruzi transcriptome was observed during the early establishment of intracellular infection, coincident with a major developmental transition in the parasite. Contrasting this early response, few additional changes in steady state mRNA levels were detected once mature T. cruzi amastigotes were formed. Our findings suggest that transcriptome remodeling is required to establish a modified template to guide developmental transitions in the parasite, whereas homeostatic functions are regulated independently of transcriptomic changes, similar to that reported in related trypanosomatids. Despite complex mechanisms for regulation of phenotypic expression in T. cruzi, transcriptomic signatures derived from distinct developmental stages mirror known or projected characteristics of T. cruzi biology. Focusing on energy metabolism, we were able to validate predictions forecast in the mRNA expression profiles. We demonstrate measurable differences in the bioenergetic properties of the different mammalian-infective stages of T. cruzi and present additional findings that underscore the importance of mitochondrial electron transport in T. cruzi amastigote growth and survival. Consequences of T. cruzi colonization for the host include dynamic expression of immune response genes and cell cycle regulators with upregulation of host cholesterol and lipid synthesis pathways, which may serve to fuel intracellular T. cruzi growth. Thus, in addition to the biological inferences gained from gene ontology and functional enrichment analysis of differentially expressed genes in parasite and host, our comprehensive, high resolution transcriptomic dataset provides a substantially more detailed interpretation of T. cruzi infection biology and offers a basis for future drug and vaccine discovery efforts. In-depth knowledge of the functional processes governing host colonization and transmission of pathogenic microorganisms is essential for the advancement of effective intervention strategies. This study focuses on Trypanosoma cruzi, the vector-borne protozoan parasite responsible for human Chagas disease and the leading cause of infectious myocarditis worldwide. To gain global insights into the biology of this parasite and its interaction with mammalian host cells, we have exploited a deep-sequencing approach to generate comprehensive, high-resolution transcriptomic maps for mammalian-infective stages of T. cruzi with the simultaneous interrogation of the human host cell transcriptome across an infection time course. We demonstrate that the establishment of intracellular T. cruzi infection in mammalian host cells is accompanied by extensive remodeling of the parasite and host cell transcriptomes. Despite the lack of transcriptional control mechanisms in trypanosomatids, our analyses identified functionally-enriched processes within sets of developmentally-regulated transcripts in T. cruzi that align with known or predicted biological features of the parasite. The novel insights into the biology of intracellular T. cruzi infection and the regulation of amastigote development gained in this study establish a unique foundation for functional network analyses that will be instrumental in providing functional links between parasite dependencies and host functional pathways that have the potential to be exploited for intervention.
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Affiliation(s)
- Yuan Li
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Sheena Shah-Simpson
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Kwame Okrah
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland, United States of America
| | - A Trey Belew
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Jungmin Choi
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Kacey L Caradonna
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Prasad Padmanabhan
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - David M Ndegwa
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - M Ramzi Temanni
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Héctor Corrada Bravo
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland, United States of America
| | - Najib M El-Sayed
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America.,Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland, United States of America
| | - Barbara A Burleigh
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America
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30
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Cardoso MS, Reis-Cunha JL, Bartholomeu DC. Evasion of the Immune Response by Trypanosoma cruzi during Acute Infection. Front Immunol 2016; 6:659. [PMID: 26834737 PMCID: PMC4716143 DOI: 10.3389/fimmu.2015.00659] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 12/24/2015] [Indexed: 12/11/2022] Open
Abstract
Trypanosoma cruzi is the etiologic agent of Chagas disease, a neglected tropical disease that affects millions of people mainly in Latin America. To establish a life-long infection, T. cruzi must subvert the vertebrate host's immune system, using strategies that can be traced to the parasite's life cycle. Once inside the vertebrate host, metacyclic trypomastigotes rapidly invade a wide variety of nucleated host cells in a membrane-bound compartment known as the parasitophorous vacuole, which fuses to lysosomes, originating the phagolysosome. In this compartment, the parasite relies on a complex network of antioxidant enzymes to shield itself from lysosomal oxygen and nitrogen reactive species. Lysosomal acidification of the parasitophorous vacuole is an important factor that allows trypomastigote escape from the extremely oxidative environment of the phagolysosome to the cytoplasm, where it differentiates into amastigote forms. In the cytosol of infected macrophages, oxidative stress instead of being detrimental to the parasite, favors amastigote burden, which then differentiates into bloodstream trypomastigotes. Trypomastigotes released in the bloodstream upon the rupture of the host cell membrane express surface molecules, such as calreticulin and GP160 proteins, which disrupt initial and key components of the complement pathway, while others such as glycosylphosphatidylinositol-mucins stimulate immunoregulatory receptors, delaying the progression of a protective immune response. After an immunologically silent entry at the early phase of infection, T. cruzi elicits polyclonal B cell activation, hypergammaglobulinemia, and unspecific anti-T. cruzi antibodies, which are inefficient in controlling the infection. Additionally, the coexpression of several related, but not identical, epitopes derived from trypomastigote surface proteins delays the generation of T. cruzi-specific neutralizing antibodies. Later in the infection, the establishment of an anti-T. cruzi CD8(+) immune response focused on the parasite's immunodominant epitopes controls parasitemia and tissue infection, but fails to completely eliminate the parasite. This outcome is not detrimental to the parasite, as it reduces host mortality and maintains the parasite infectivity toward the insect vectors.
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Affiliation(s)
- Mariana S Cardoso
- Laboratório de Imunologia e Genômica de Parasitos, Departamento de Parasitologia, Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais, Brazil
| | - João Luís Reis-Cunha
- Laboratório de Imunologia e Genômica de Parasitos, Departamento de Parasitologia, Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais, Brazil
| | - Daniella C Bartholomeu
- Laboratório de Imunologia e Genômica de Parasitos, Departamento de Parasitologia, Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais, Brazil
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31
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Zhang DL, Yu DH, Chen J, Chen C, Wang ZY. Co-expression of march5b and tlr7 in large yellow croaker Larimichthys crocea in response to Cryptocaryon irritans infection. JOURNAL OF FISH BIOLOGY 2015; 87:360-370. [PMID: 26179830 DOI: 10.1111/jfb.12726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 07/01/2014] [Accepted: 05/15/2015] [Indexed: 06/04/2023]
Abstract
In this study, molecular characteristics of march5b and co-expression of march5b and tlr7 in response to the infection of Cryptocaryon irritans in the large yellow croaker Larimichthys crocea were investigated. The full-length complementary (c)DNA of march5b was 1314 bp, including an open reading frame of 846 bp encoding a polypeptide of 281 amino acids, and the full-length genomic sequence was composed of 23,577 nucleotides, including six exons and five introns. The putative March5b protein contained a RINGv motif and four transmembrane domains. The march5b transcripts were broadly distributed in all detected tissues, with a strong expression in blood, brain and gills, and a weak expression in kidney by quantitative PCR analysis. The expression of march5b and tlr7 in the skin, gills, spleen and head kidney changed in the same manner at most time points post-primary infection with C. irritans. Significant increase was observed in the skin with march5b at days 2 and 3 by 26.10 and 6.88 fold, respectively, and with tlr7 at day 3 by 57.68 fold, when compared with the control. Their expressions, however, were decreased in the gills, especially at day 3 (march5b by 8.9%, tlr7 by 22.06%). In the spleen and head kidney, march5b and tlr7 transcripts were up-regulated early, then noticeably declined at day 3. These results suggested that march5b and tlr7 are co-expressed in response to parasite infection and March5b probably catalyses ubiquitination of some proteins of TLR7 signalling pathway.
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Affiliation(s)
- D L Zhang
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, PR China
| | - D H Yu
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, PR China
| | - J Chen
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, PR China
| | - C Chen
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, PR China
| | - Z Y Wang
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Fisheries College, Jimei University, Xiamen, 361021, PR China
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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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Abstract
Parasitic diseases are a serious global health concern. Many of the most common and most severe parasitic diseases, including Chagas' disease, leishmaniasis, and schistosomiasis, are also classified as neglected tropical diseases and are comparatively less studied than infectious diseases prevalent in high income nations. The NLRs (nucleotide-binding domain leucine-rich-repeat-containing proteins) are cytosolic proteins known to be involved in pathogen detection and host response. The role of NLRs in the host response to parasitic infection is just beginning to be understood. The NLR proteins NOD1 and NOD2 have been shown to contribute to immune responses during Trypanosoma cruzi infection, Toxoplasma gondii infection, and murine cerebral malaria. The NLRP3 inflammasome is activated by T. cruzi and Leishmania amazonensis but also induces pathology during infection with schistosomes or malaria. Both the NLRP1 and NLRP3 inflammasomes respond to T. gondii infection. The NLRs may play crucial roles in human immune responses during parasitic infection, usually acting as innate immune sensors and driving the inflammatory response against invading parasites. However, this inflammatory response can either kill the invading parasite or be responsible for destructive pathology. Therefore, understanding the role of the NLR proteins will be critical to understanding the host defense against parasites as well as the fine balance between homeostasis and parasitic disease.
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Affiliation(s)
- Gwendolyn M Clay
- The Interdisciplinary Program in Molecular and Cellular Biology, University of Iowa, 400 EMRB, 500 Newton Rd., Iowa City, IA, 52242, USA
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dos Santos LI, Galvão-Filho B, de Faria PC, Junqueira C, Dutra MS, Teixeira SMR, Rodrigues MM, Ritter G, Bannard O, Fearon DT, Antonelli LR, Gazzinelli RT. Blockade of CTLA-4 promotes the development of effector CD8+ T lymphocytes and the therapeutic effect of vaccination with an attenuated protozoan expressing NY-ESO-1. Cancer Immunol Immunother 2015; 64:311-23. [PMID: 25403749 PMCID: PMC11029141 DOI: 10.1007/s00262-014-1634-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 11/04/2014] [Indexed: 10/24/2022]
Abstract
The development of cancer immunotherapy has long been a challenge. Here, we report that prophylactic vaccination with a highly attenuated Trypanosoma cruzi strain expressing NY-ESO-1 (CL-14-NY-ESO-1) induces both effector memory and effector CD8(+) T lymphocytes that efficiently prevent tumor development. However, the therapeutic effect of such a vaccine is limited. We also demonstrate that blockade of Cytotoxic T Lymphocyte Antigen 4 (CTLA-4) during vaccination enhances the frequency of NY-ESO-1-specific effector CD8(+) T cells producing IFN-γ and promotes lymphocyte migration to the tumor infiltrate. As a result, therapy with CL-14-NY-ESO-1 together with anti-CTLA-4 is highly effective in controlling the development of an established melanoma.
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Affiliation(s)
- Luara Isabela dos Santos
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais 30190-002 Brazil
- Departamento de Bioquimica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901 Brazil
| | - Bruno Galvão-Filho
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais 30190-002 Brazil
- Departamento de Bioquimica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901 Brazil
| | - Paula Cristina de Faria
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais 30190-002 Brazil
| | - Caroline Junqueira
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais 30190-002 Brazil
- Departamento de Bioquimica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901 Brazil
| | - Miriam Santos Dutra
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais 30190-002 Brazil
- Departamento de Bioquimica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901 Brazil
| | - Santuza Maria Ribeiro Teixeira
- Departamento de Bioquimica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901 Brazil
| | - Maurício Martins Rodrigues
- Centro de Terapia Celular e Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP 04044-010 Brazil
| | - Gerd Ritter
- New York Branch at Memorial Sloan-Kettering Cancer Center, Ludwig Institute for Cancer Research, New York, NY 10065-6007 USA
| | - Oliver Bannard
- Department of Microbiology and Immunology, Howard Hughes Medical Institute, University of California, San Francisco, CA USA
| | - Douglas Thomas Fearon
- Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge, CB2 2QH UK
| | - Lis Ribeiro Antonelli
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais 30190-002 Brazil
| | - Ricardo Tostes Gazzinelli
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais 30190-002 Brazil
- Departamento de Bioquimica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901 Brazil
- Department of Medicine, Division of Infectious Diseases and Immunology, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA 01605-02324 USA
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Lafferty EI, Wiltshire SA, Angers I, Vidal SM, Qureshi ST. Unc93b1 -Dependent Endosomal Toll-Like Receptor Signaling Regulates Inflammation and Mortality during Coxsackievirus B3 Infection. J Innate Immun 2015; 7:315-30. [PMID: 25675947 DOI: 10.1159/000369342] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 10/26/2014] [Indexed: 12/24/2022] Open
Abstract
Coxsackievirus strain B serotype 3 (CVB3)-induced myocarditis is an important human disease that causes permanent tissue damage and can lead to death from acute infection or long-term morbidity caused by chronic inflammation. The timing and magnitude of immune activation following CVB3 infection can mediate a positive host outcome or increase tissue pathology. To better elucidate the role of endosomal Toll-like receptor (TLR) signaling in acute CVB3 infection, we studied mice with a loss-of-function mutation, known as Letr for 'loss of endosomal TLR response', in Unc93b1, which is a chaperone protein for TLR3, TLR7 and TLR9. Using Unc93b1(Letr/)(Letr) mice, we determined that Unc93b1-dependent TLR activation was essential for the survival of acute CVB3-induced myocarditis. We also determined that a lack of endosomal TLR signaling was associated with a higher viral load in target organs and that it increased inflammation, necrosis and fibrosis in cardiac tissue. Loss of Unc93b1 function was also associated with increased cardiac expression of Ifn-b and markers of tissue injury and fibrosis including Lcn2 and Serpina3n early after CVB3 infection. These observations establish a significant role for Unc93b1 in the regulation of the host inflammatory response to CVB3 infection and also reveal potential mediators of host tissue damage that merit further investigation in acute viral myocarditis.
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Affiliation(s)
- Erin I Lafferty
- Meakins-Christie Laboratories, McGill University, Montréal, Qué., Canada
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Khan ME, Borde C, Rocha EP, Mériaux V, Maréchal V, Escoll P, Goyard S, Cavaillon JM, Manoury B, Doyen N. TLR9 activation is triggered by the excess of stimulatory versus inhibitory motifs present in Trypanosomatidae DNA. PLoS Negl Trop Dis 2014; 8:e3308. [PMID: 25392997 PMCID: PMC4230925 DOI: 10.1371/journal.pntd.0003308] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 10/02/2014] [Indexed: 11/18/2022] Open
Abstract
DNA sequences purified from distinct organisms, e.g. non vertebrate versus vertebrate ones, were shown to differ in their TLR9 signalling properties especially when either mouse bone marrow-derived- or human dendritic cells (DCs) are probed as target cells. Here we found that the DC-targeting immunostimulatory property of Leishmania major DNA is shared by other Trypanosomatidae DNA, suggesting that this is a general trait of these eukaryotic single-celled parasites. We first documented, in vitro, that the low level of immunostimulatory activity by vertebrate DNA is not due to its limited access to DCs' TLR9. In addition, vertebrate DNA inhibits the activation induced by the parasite DNA. This inhibition could result from the presence of competing elements for TLR9 activation and suggests that DNA from different species can be discriminated by mouse and human DCs. Second, using computational analysis of genomic DNA sequences, it was possible to detect the presence of over-represented inhibitory and under-represented stimulatory sequences in the vertebrate genomes, whereas L. major genome displays the opposite trend. Interestingly, this contrasting features between L. major and vertebrate genomes in the frequency of these motifs are shared by other Trypanosomatidae genomes (Trypanosoma cruzi, brucei and vivax). We also addressed the possibility that proteins expressed in DCs could interact with DNA and promote TLR9 activation. We found that TLR9 is specifically activated with L. major HMGB1-bound DNA and that HMGB1 preferentially binds to L. major compared to mouse DNA. Our results highlight that both DNA sequence and vertebrate DNA-binding proteins, such as the mouse HMGB1, allow the TLR9-signaling to be initiated and achieved by Trypanosomatidae DNA.
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Affiliation(s)
- Mélissa Erin Khan
- Institut Pasteur, Département Infection et Epidémiologie, Unité Cytokines & Inflammation, Paris, France
| | - Chloé Borde
- Institut Pasteur, Département Infection et Epidémiologie, Unité Cytokines & Inflammation, Paris, France
| | - Eduardo P.C. Rocha
- Institut Pasteur, Département Génomes et Génétique, Unité de Génomique Evolutive des Microbes, Paris, France
- CNRS UMR3525, Paris, France
| | - Véronique Mériaux
- Institut Pasteur, Département Infection et Epidémiologie, Unité Cytokines & Inflammation, Paris, France
| | - Vincent Maréchal
- Sorbonne Universités, UPMC Université Paris 6, INSERM U1135, Centre d'Immunologie et des Maladies Infectieuses (CIMI), Persistent Viral Infections (PVI) Team, Paris, France
| | - Pedro Escoll
- Institut Pasteur, Département Génomes et Génétique, Unité de Biologie des Bactéries intracellulaires, Paris, France
| | - Sophie Goyard
- Institut Pasteur, Département Infection et Epidémiologie, Laboratoire des Processus Infectieux à Trypanosomatidés, Paris, France
| | - Jean-Marc Cavaillon
- Institut Pasteur, Département Infection et Epidémiologie, Unité Cytokines & Inflammation, Paris, France
| | | | - Noëlle Doyen
- Institut Pasteur, Département Infection et Epidémiologie, Unité Cytokines & Inflammation, Paris, France
- * E-mail:
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Dey N, Sinha M, Gupta S, Gonzalez MN, Fang R, Endsley JJ, Luxon BA, Garg NJ. Caspase-1/ASC inflammasome-mediated activation of IL-1β-ROS-NF-κB pathway for control of Trypanosoma cruzi replication and survival is dispensable in NLRP3-/- macrophages. PLoS One 2014; 9:e111539. [PMID: 25372293 PMCID: PMC4221042 DOI: 10.1371/journal.pone.0111539] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 09/27/2014] [Indexed: 12/15/2022] Open
Abstract
In this study, we have utilized wild-type (WT), ASC-/-, and NLRP3-/- macrophages and inhibition approaches to investigate the mechanisms of inflammasome activation and their role in Trypanosoma cruzi infection. We also probed human macrophages and analyzed published microarray datasets from human fibroblasts, and endothelial and smooth muscle cells for T. cruzi-induced changes in the expression genes included in the RT Profiler Human Inflammasome arrays. T. cruzi infection elicited a subdued and delayed activation of inflammasome-related gene expression and IL-1β production in mφs in comparison to LPS-treated controls. When WT and ASC-/- macrophages were treated with inhibitors of caspase-1, IL-1β, or NADPH oxidase, we found that IL-1β production by caspase-1/ASC inflammasome required reactive oxygen species (ROS) as a secondary signal. Moreover, IL-1β regulated NF-κB signaling of inflammatory cytokine gene expression and, subsequently, intracellular parasite replication in macrophages. NLRP3-/- macrophages, despite an inability to elicit IL-1β activation and inflammatory cytokine gene expression, exhibited a 4-fold decline in intracellular parasites in comparison to that noted in matched WT controls. NLRP3-/- macrophages were not refractory to T. cruzi, and instead exhibited a very high basal level of ROS (>100-fold higher than WT controls) that was maintained after infection in an IL-1β-independent manner and contributed to efficient parasite killing. We conclude that caspase-1/ASC inflammasomes play a significant role in the activation of IL-1β/ROS and NF-κB signaling of cytokine gene expression for T. cruzi control in human and mouse macrophages. However, NLRP3-mediated IL-1β/NFκB activation is dispensable and compensated for by ROS-mediated control of T. cruzi replication and survival in macrophages.
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Affiliation(s)
- Nilay Dey
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, Texas, United States of America
- * E-mail: (ND); (NJG)
| | - Mala Sinha
- Department of BioChemistry & Molecular Biology, UTMB, Galveston, Texas, United States of America
| | - Shivali Gupta
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, Texas, United States of America
| | - Mariela Natacha Gonzalez
- Instituto Nacional de Parasitología “Dr. Mario Fatala Chaben”, Ciudad Autónoma de Buenos Aires, Argentina
| | - Rong Fang
- Department of Pathology, UTMB, Galveston, Texas, United States of America
| | - Janice J. Endsley
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, Texas, United States of America
| | - Bruce A. Luxon
- Department of BioChemistry & Molecular Biology, UTMB, Galveston, Texas, United States of America
| | - Nisha Jain Garg
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, Texas, United States of America
- Department of Pathology, UTMB, Galveston, Texas, United States of America
- Faculty of the Institute for Human Infections and Immunity and the Center for Tropical Diseases, UTMB, Galveston, Texas, United States of America
- * E-mail: (ND); (NJG)
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Gazzinelli RT, Kalantari P, Fitzgerald KA, Golenbock DT. Innate sensing of malaria parasites. Nat Rev Immunol 2014; 14:744-57. [PMID: 25324127 DOI: 10.1038/nri3742] [Citation(s) in RCA: 207] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Innate immune receptors have a key role in immune surveillance by sensing microorganisms and initiating protective immune responses. However, the innate immune system is a classic 'double-edged sword' that can overreact to pathogens, which can have deleterious effects and lead to clinical manifestations. Recent studies have unveiled the complexity of innate immune receptors that function as sensors of Plasmodium spp. in the vertebrate host. This Review highlights the cellular and molecular mechanisms by which Plasmodium infection is sensed by different families of innate immune receptors. We also discuss how these events mediate both host resistance to infection and the pathogenesis of malaria.
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Affiliation(s)
- Ricardo T Gazzinelli
- 1] Division of Infectious Diseases and Immunology, University of Massachusetts Medical School, 01605-02324 Worcester, Massachusetts, USA. [2] Laboratório de Imunopatologia, Centro de Pesquisa René Rachou, Fundação Oswaldo Cruz, 30190-002 Belo Horizonte, Minas Gerais, Brazil. [3] Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Parisa Kalantari
- Division of Infectious Diseases and Immunology, University of Massachusetts Medical School, 01605-02324 Worcester, Massachusetts, USA
| | - Katherine A Fitzgerald
- Division of Infectious Diseases and Immunology, University of Massachusetts Medical School, 01605-02324 Worcester, Massachusetts, USA
| | - Douglas T Golenbock
- 1] Division of Infectious Diseases and Immunology, University of Massachusetts Medical School, 01605-02324 Worcester, Massachusetts, USA. [2] Laboratório de Imunopatologia, Centro de Pesquisa René Rachou, Fundação Oswaldo Cruz, 30190-002 Belo Horizonte, Minas Gerais, Brazil
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40
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Trypanosoma cruzi infection in genetically selected mouse lines: genetic linkage with quantitative trait locus controlling antibody response. Mediators Inflamm 2014; 2014:952857. [PMID: 25197170 PMCID: PMC4146349 DOI: 10.1155/2014/952857] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 07/15/2014] [Accepted: 07/16/2014] [Indexed: 01/21/2023] Open
Abstract
Trypanosoma cruzi infection was studied in mouse lines selected for maximal (AIRmax) or minimal (AIRmin) acute inflammatory reaction and for high (HIII) or low (LIII) antibody (Ab) responses to complex antigens. Resistance was associated with gender (females) and strain—the high responder lines AIRmax and HIII were resistant. The higher resistance of HIII as compared to LIII mice extended to higher infective doses and was correlated with enhanced production of IFN-γ and nitric oxide production by peritoneal and lymph node cells, in HIII males and females. We also analyzed the involvement of previously mapped Ab and T. cruzi response QTL with the survival of Selection III mice to T. cruzi infections in a segregating backcross [F1(HIII×LIII) ×LIII] population. An Ab production QTL marker mapping to mouse chromosome 1 (34.8 cM) significantly cosegregated with survival after acute T. cruzi infections, indicating that this region also harbors genes whose alleles modulate resistance to acute T. cruzi infection.
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Skert C, Fogli M, Garrafa E, Perucca S, Fiorentini S, Cancelli V, Turra A, Ribolla R, Filì C, Malagola M, Bergonzi C, Cattina F, Bernardi S, Caruso A, Di Palma A, Russo D. A specific Toll-like receptor profile on T lymphocytes and values of monocytes correlate with bacterial, fungal, and cytomegalovirus infections in the early period of allogeneic stem cell transplantation. Transpl Infect Dis 2014; 16:697-712. [DOI: 10.1111/tid.12264] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 04/10/2014] [Accepted: 04/21/2014] [Indexed: 01/30/2023]
Affiliation(s)
- C. Skert
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - M. Fogli
- Section of Microbiology; Department of Experimental and Applied Medicine; University of Brescia; Brescia Italy
| | - E. Garrafa
- Section of Microbiology; Department of Experimental and Applied Medicine; University of Brescia; Brescia Italy
| | - S. Perucca
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - S. Fiorentini
- Section of Microbiology; Department of Experimental and Applied Medicine; University of Brescia; Brescia Italy
| | - V. Cancelli
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - A. Turra
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - R. Ribolla
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - C. Filì
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - M. Malagola
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - C. Bergonzi
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - F. Cattina
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - S. Bernardi
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - A. Caruso
- Section of Microbiology; Department of Experimental and Applied Medicine; University of Brescia; Brescia Italy
| | - A. Di Palma
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - D. Russo
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
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42
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Chagas disease: still many unsolved issues. Mediators Inflamm 2014; 2014:912965. [PMID: 25104883 PMCID: PMC4101227 DOI: 10.1155/2014/912965] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 06/15/2014] [Indexed: 11/18/2022] Open
Abstract
Over the past 20 years, the immune effector mechanisms involved in the control of Trypanosoma cruzi, as well as the receptors participating in parasite recognition by cells of the innate immune system, have been largely described. However, the main questions on the physiopathology of Chagas disease remain unanswered: “Why does the host immune system fail to provide sterile immunity?” and “Why do only a proportion of infected individuals develop chronic pathology?” In this review, we describe the mechanisms proposed to explain the inability of the immune system to eradicate the parasite and the elements that allow the development of chronic heart disease. Moreover, we discuss the possibility that the inability of infected cardiomyocytes to sense intracellular T. cruzi contributes to parasite persistence in the heart and the development of chronic pathology.
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43
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An ENU-induced splicing mutation reveals a role for Unc93b1 in early immune cell activation following influenza A H1N1 infection. Genes Immun 2014; 15:320-32. [PMID: 24848930 PMCID: PMC4978536 DOI: 10.1038/gene.2014.22] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 04/09/2014] [Accepted: 04/10/2014] [Indexed: 12/24/2022]
Abstract
Genetic and immunological analysis of host-pathogen interactions can reveal fundamental mechanisms of susceptibility and resistance to infection. Modeling human infectious diseases among inbred mouse strains is a proven approach but is limited by naturally occurring genetic diversity. Using ENU mutagenesis, we created a recessive loss-of-function point mutation in Unc93b1 (unc-93 homolog B1 (C. elegans)), a chaperone for endosomal TLR3, TLR7, and TLR9, that we termed Letr for ‘loss of endosomal TLR response’. We used Unc93b1Letr/Letr mice to study the role of Unc93b1 in the immune response to influenza A/PR/8/34 (H1N1), an important global respiratory pathogen. During the early phase of infection, Unc93b1Letr/Letr mice had fewer activated exudate macrophages and decreased expression of CXCL10, IFN-γ, and type I IFN. Mutation of Unc93b1 also led to reduced expression of the CD69 activation marker and a concomitant increase in the CD62L naïve marker on CD4+ and CD8+ T cells in infected lungs. Finally, loss of endosomal TLR signaling resulted in delayed viral clearance that coincided with increased tissue pathology during infection. Taken together, these findings establish a role for Unc93b1 and endosomal TLRs in the activation of both myeloid and lymphoid cells during the innate immune response to influenza.
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44
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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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Gutierrez FRS, Sesti-Costa R, Silva GK, Trujillo ML, Guedes PMM, Silva JS. Regulation of the immune response during infectious myocarditis. Expert Rev Cardiovasc Ther 2014; 12:187-200. [DOI: 10.1586/14779072.2014.879824] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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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: 80] [Impact Index Per Article: 7.3] [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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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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Koh YT, Scatizzi JC, Gahan JD, Lawson BR, Baccala R, Pollard KM, Beutler BA, Theofilopoulos AN, Kono DH. Role of nucleic acid-sensing TLRs in diverse autoantibody specificities and anti-nuclear antibody-producing B cells. THE JOURNAL OF IMMUNOLOGY 2013; 190:4982-90. [PMID: 23589617 DOI: 10.4049/jimmunol.1202986] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Nucleic acid (NA)-sensing TLRs (NA-TLRs) promote the induction of anti-nuclear Abs in systemic lupus erythematosus. However, the extent to which other nonnuclear pathogenic autoantibody specificities that occur in lupus and independently in other autoimmune diseases depend on NA-TLRs, and which immune cells require NA-TLRs in systemic autoimmunity, remains to be determined. Using Unc93b1(3d) lupus-prone mice that lack NA-TLR signaling, we found that all pathogenic nonnuclear autoantibody specificities examined, even anti-RBC, required NA-TLRs. Furthermore, we document that NA-TLRs in B cells were required for the development of antichromatin and rheumatoid factor. These findings support a unifying NA-TLR-mediated mechanism of autoantibody production that has both pathophysiological and therapeutic implications for systemic lupus erythematosus and several other humoral-mediated autoimmune diseases. In particular, our findings suggest that targeting of NA-TLR signaling in B cells alone would be sufficient to specifically block production of a broad diversity of autoantibodies.
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Affiliation(s)
- Yi Ting Koh
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA
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He X, Jia H, Jing Z, Liu D. Recognition of pathogen-associated nucleic acids by endosomal nucleic acid-sensing toll-like receptors. Acta Biochim Biophys Sin (Shanghai) 2013; 45:241-58. [PMID: 23369718 PMCID: PMC7109797 DOI: 10.1093/abbs/gms122] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Foreign nucleic acids, the essential signature molecules of invading pathogens that act as danger signals for host cells, are detected by endosomal nucleic acid-sensing toll-like receptors (TLRs) 3, 7, 8, 9, and 13. These TLRs have evolved to recognize ‘non-self’ nucleic acids within endosomal compartments and rapidly initiate innate immune responses to ensure host protection through induction of type I interferons, inflammatory cytokines, chemokines, and co-stimulatory molecules and maturation of immune cells. In this review, we highlight our understanding of the recognition of pathogen-associated nucleic acids and activation of corresponding signaling pathways through endosomal nucleic acid-sensing TLRs 3, 7, 8, 9, and 13 for an enormous diversity of pathogens, with particular emphasis on their compartmentalization, intracellular trafficking, proteolytic cleavage, autophagy, and regulatory programs.
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Affiliation(s)
- Xiaobing He
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Public Health of Ministry of Agriculture, Lanzhou Veterinary Research Institute, CAAS, Lanzhou 730046, China
| | - Huaijie Jia
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Public Health of Ministry of Agriculture, Lanzhou Veterinary Research Institute, CAAS, Lanzhou 730046, China
| | - Zhizhong Jing
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Public Health of Ministry of Agriculture, Lanzhou Veterinary Research Institute, CAAS, Lanzhou 730046, China
- Correspondence address. Tel: +86-931-8341979; Fax: +86-931-8340977; E-mail: (Z.J.)/ (D.L.)
| | - Dingxiang Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Public Health of Ministry of Agriculture, Lanzhou Veterinary Research Institute, CAAS, Lanzhou 730046, China
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore
- Correspondence address. Tel: +86-931-8341979; Fax: +86-931-8340977; E-mail: (Z.J.)/ (D.L.)
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Trypomastigotes and amastigotes of Trypanosoma cruzi induce apoptosis and STAT3 activation in cardiomyocytes in vitro. Apoptosis 2013; 18:653-63. [DOI: 10.1007/s10495-013-0822-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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