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Camelo GMA, Silva JKADO, Geiger SM, Melo MN, Negrão-Corrêa DA. Schistosoma and Leishmania: An Untold Story of Coinfection. Trop Med Infect Dis 2023; 8:383. [PMID: 37624321 PMCID: PMC10458104 DOI: 10.3390/tropicalmed8080383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 08/26/2023] Open
Abstract
A remarkable characteristic of infectious diseases classified as Neglected Tropical Diseases (NTDs) is the fact that they are mostly transmitted in tropical and subtropical regions with poor conditions of sanitation and low access to healthcare, which makes transmission areas more likely to overlap. Two of the most important NTDs, schistosomiasis and leishmaniasis, despite being caused by very different etiological agents, have their pathogenesis heavily associated with immune-mediated mechanisms, and Schistosoma spp. and Leishmania spp. have been shown to simultaneously infect humans. Still, the consequences of Schistosoma-Leishmania coinfections remain underexplored. As the inflammatory processes elicited by each one of these parasites can influence the other, several changes have been observed due to this coinfection in naturally infected humans, experimental models, and in vitro cell assays, including modifications in susceptibility to infection, pathogenesis, prognostic, and response to treatment. Herein, we review the current knowledge in Schistosoma-Leishmania coinfections in both human populations and experimental models, with special regard to how schistosomiasis affects tegumentary leishmaniasis, discuss future perspectives, and suggest a few steps to further improve our understanding in this model of parasite-host-parasite interaction.
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Affiliation(s)
| | | | | | | | - Deborah Aparecida Negrão-Corrêa
- Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.M.A.C.)
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Maggi L, Camelo GMA, Rocha IC, Pereira Alves W, Moreira JMP, Almeida Pereira T, Tafuri WL, Rabelo ÉML, Correa A, Ecco R, Negrão-Corrêa DA. Role of the IL-33/ST2 Activation Pathway in the Development of the Hepatic Fibrosis Induced by Schistosoma mansoni Granulomas in Mice. Int J Mol Sci 2023; 24:10237. [PMID: 37373379 PMCID: PMC10299179 DOI: 10.3390/ijms241210237] [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: 05/26/2023] [Revised: 06/06/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023] Open
Abstract
Schistosoma mansoni eggs retained in host tissues induce innate cytokine release, contributing to the induction of Type-2 immune responses and granuloma formation, important to restrain cytotoxic antigens, but leading to fibrosis. Interleukin(IL)-33 participates in experimental models of inflammation and chemically induced fibrosis, but its role in S. mansoni-induced fibrosis is still unknown. To explore the role of the IL-33/suppressor of the tumorigenicity 2 (ST2) pathway, serum and liver cytokine levels, liver histopathology, and collagen deposition were comparatively evaluated in S. mansoni-infected wild-type (WT) and IL-33-receptor knockout (ST2-/-) BALB/c mice. Our data show similar egg counts and hydroxyproline in the livers of infected WT and ST2-/- mice; however, the extracellular matrix in ST2-/- granulomas was loose and disorganised. Pro-fibrotic cytokines, such as IL-13 and IL-17, and the tissue-repairing IL-22 were significantly lower in ST2-/- mice, especially in chronic schistosomiasis. ST2-/- mice also showed decreased α-smooth muscle actin (α-SMA) expression in granuloma cells, in addition to reduced Col III and Col VI mRNA levels and reticular fibres. Therefore, IL-33/ST2 signalling is essential for tissue repairing and myofibroblast activation during S. mansoni infection. Its disruption results in inappropriate granuloma organisation, partly due to the reduced type III and VI collagen and reticular fibre formation.
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Affiliation(s)
- Laura Maggi
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (L.M.); (G.M.A.C.); (I.C.R.); (J.M.P.M.)
| | - Genil Mororó Araújo Camelo
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (L.M.); (G.M.A.C.); (I.C.R.); (J.M.P.M.)
| | - Izabella Chrystina Rocha
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (L.M.); (G.M.A.C.); (I.C.R.); (J.M.P.M.)
- Curso de Enfermagem, Instituto de Ciências Biológicas e Saúde, Universidade Federal de Mato Grosso, Barra do Garça 78698-000, MG, Brazil
| | - William Pereira Alves
- Laboratório de Parasitologia Molecular, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (W.P.A.); (É.M.L.R.)
| | - João Marcelo Peixoto Moreira
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (L.M.); (G.M.A.C.); (I.C.R.); (J.M.P.M.)
| | - Thiago Almeida Pereira
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA;
| | - Wagner Luiz Tafuri
- Laboratório de Patologia das Leishmanioses, Departamento de Patologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil;
| | - Élida Mara Leite Rabelo
- Laboratório de Parasitologia Molecular, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (W.P.A.); (É.M.L.R.)
| | - Ary Correa
- Laboratório de Micologia, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil;
| | - Roselene Ecco
- Setor de Patologia, Escola Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil;
| | - Deborah Aparecida Negrão-Corrêa
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (L.M.); (G.M.A.C.); (I.C.R.); (J.M.P.M.)
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He X, Sun Y, Yang F, Zheng G, Li R, Liu M, Li W, Zhou DH, Zheng Y. Heat shock protein 60 in parasitic helminths: A role in immune responses and therapeutic applications. Mol Biochem Parasitol 2023; 253:111544. [PMID: 36641059 DOI: 10.1016/j.molbiopara.2023.111544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 01/13/2023]
Abstract
Heat shock protein 60 (HSP60) is an unique member of the heat shock protein family, being involved in parasite infections. To cope with harsh environments where parasites live, HSP60s are indispensable and involved in a variety of biological processes. HSP60s have relative low similarity among parasites, but their ATPase /Mg2+ active sites are highly conserved. The interactions of HSP60s with signaling pathway regulators in immune cells suggest a crucial role in immune responses, rendering them a potential therapeutic target. This paper reviews the current understandings of HSP60s in parasitic helminths in aspects of molecular characteristics, immunoregulatory responses and HSP60-based therapeutics.
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Affiliation(s)
- Xuedong He
- Key Laboratory of Applied Technology on Green-Eco Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology&College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
| | - Yue Sun
- Key Laboratory of Applied Technology on Green-Eco Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology&College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
| | - Fang Yang
- Zhejiang Kangjia Gene Technology Limited Liability Company, Hangzhou 310022, China
| | - Guanghui Zheng
- Key Laboratory of Applied Technology on Green-Eco Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology&College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
| | - Rui Li
- Key Laboratory of Applied Technology on Green-Eco Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology&College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
| | - Mengqi Liu
- Key Laboratory of Applied Technology on Green-Eco Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology&College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
| | - Wanjing Li
- Key Laboratory of Applied Technology on Green-Eco Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology&College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
| | - Dong-Hui Zhou
- Key Laboratory of Fujian-Taiwan Animal Pathogen Biology, College of Animal Sciences (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Yadong Zheng
- Key Laboratory of Applied Technology on Green-Eco Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology&College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China.
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Zhang Y, Li J, Li H, Jiang J, Guo C, Zhou C, Zhou Z, Ming Y. Single-cell RNA sequencing to dissect the immunological network of liver fibrosis in Schistosoma japonicum-infected mice. Front Immunol 2022; 13:980872. [PMID: 36618421 PMCID: PMC9814160 DOI: 10.3389/fimmu.2022.980872] [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: 06/29/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
Introduction Liver fibrosis is a poor outcome of patients with schistosomiasis, impacting the quality of life and even survival. Eggs deposited in the liver were the main pathogenic factors of hepatic fibrosis in Schistosomiasis japonica. However, the mechanism of hepatic fibrosis in schistosomiasis remains not well defined and there is no effective measure to prevent and treat schistosome-induced hepatic fibrosis. Methods In this study, we applied single-cell sequencing to primarily explore the mechanism of hepatic fibrosis in murine schistosomiasis japonica (n=1) and normal mouse was served as control (n=1). Results A total of 10,403 cells were included in our analysis and grouped into 18 major cell clusters. Th2 cells and NKT cells were obviously increased and there was a close communication between NKT cells and FASLG signaling pathway. Flow cytometry analysis indicated that the expression of Fasl in NKT cells, CD8+ T cell and NK cell were higher in SJ groups. Arg1, Retnla and Chil3, marker genes of alternatively activated macrophages (M2), were mainly expressed in mononuclear phagocyte(1) (MP(1)), suggesting that Kupffer cells might undergo M2-like polarization in fibrotic liver of schistosomiasis. CXCL and CCL signaling pathway analysis with CellChat showed that Cxcl16-Cxcr6, Ccl6-Ccr2 and Ccl5-Ccr5 were the most dominant L-R and there were close interactions between T cells and MPs. Conclusion Our research profiled a preliminary immunological network of hepatic fibrosis in murine schistosomiasis japonica, which might contribute to a better understanding of the mechanisms of liver fibrosis in schistosomiasis. NKT cells and CXCL and CCL signaling pathway such as Cxcl16-Cxcr6, Ccl6-Ccr2 and Ccl5-Ccr5 might be potential targets to alleviate hepatic fibrosis of schistosomiasis.
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Affiliation(s)
- Yu Zhang
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering and Technology Research Center for Transplantation Medicine of National Health Comission, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Junhui Li
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering and Technology Research Center for Transplantation Medicine of National Health Comission, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hao Li
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering and Technology Research Center for Transplantation Medicine of National Health Comission, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jie Jiang
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering and Technology Research Center for Transplantation Medicine of National Health Comission, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chen Guo
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering and Technology Research Center for Transplantation Medicine of National Health Comission, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chen Zhou
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering and Technology Research Center for Transplantation Medicine of National Health Comission, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhaoqin Zhou
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering and Technology Research Center for Transplantation Medicine of National Health Comission, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yingzi Ming
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering and Technology Research Center for Transplantation Medicine of National Health Comission, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China,*Correspondence: Yingzi Ming,
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Giri BR, Li S, Fang C, Qiu L, Yan S, Pakharukova MY, Cheng G. Dynamic miRNA profile of host T cells during early hepatic stages of Schistosoma japonicum infection. Front Immunol 2022; 13:911139. [PMID: 36119054 PMCID: PMC9478579 DOI: 10.3389/fimmu.2022.911139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 08/09/2022] [Indexed: 11/17/2022] Open
Abstract
Schistosomes undergo complicated migration in final hosts during infection, associated with differential immune responses. It has been shown that CD4+ T cells play critical roles in response to Schistosoma infections and accumulated documents have indicated that miRNAs tightly regulate T cell activity. However, miRNA profiles in host T cells associated with Schistosoma infection remain poorly characterized. Therefore, we undertook the study and systematically characterized T cell miRNA profiles from the livers and blood of S. japonicum infected C57BL/6J mice at 14- and 21-days post-infection. We observed 508 and 504 miRNAs, in which 264 miRNAs were co-detected in T cells isolated from blood and livers, respectively. The comparative analysis of T cell miRNAs from uninfected and infected C57BL/6J mice blood showed that miR-486b-5p/3p expression was significantly downregulated and linked to various T cell immune responses and miR-375-5p was highly upregulated, associated with Wnt signaling and pluripotency, Delta notch signaling pathways, etc. Whereas hepatic T cells showed miR-466b-3p, miR-486b-3p, miR-1969, and miR-375 were differentially expressed compared to the uninfected control. The different expressions of some miRNAs were further corroborated in isolated T cells from mice and in vitro cultured EL-4 cells treated with S. japonicum worm antigens by RT-qPCR and similar results were found. In addition, bioinformatics analysis combined with RT-qPCR validation of selected targets associated with the immune system and parasite-caused infectious disease showed a significant increase in the expression of Ctla4, Atg5, Hgf, Vcl and Arpc4 and a decreased expression of Fermt3, Pik3r1, Myd88, Nfkbie, Ppp1r12a, Ppp3r1, Nfyb, Atg12, Ube2n, Tyrobp, Cxcr4 and Tollip. Overall, these results unveil the comprehensive repertoire of T cell miRNAs during S. japonicum infection, suggesting that the circulatory (blood) and liver systems have distinct miRNAs landscapes that may be important for regulating T cell immune response. Altogether, our findings indicated a dynamic expression pattern of T cell miRNAs during the hepatic stages of S. japonicum infection.
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Affiliation(s)
- Bikash R. Giri
- Shanghai Tenth People’s Hospital, Institute for Infectious Diseases and Vaccine Development, Tongji University School of Medicine, Shanghai, China
| | - Shun Li
- Key Laboratory of Animal Parasitology of Ministry of Agriculture and Rural Affairs, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Chuantao Fang
- Shanghai Tenth People’s Hospital, Institute for Infectious Diseases and Vaccine Development, Tongji University School of Medicine, Shanghai, China
| | - Lin Qiu
- Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai, China
| | - Shi Yan
- Institut für Parasitologie, Veterinärmedizinische Universität, Wien, Austria
| | - Maria Y. Pakharukova
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
- Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
- Institute of Molecular Biology and Biophysics, Novosibirsk, Russia
| | - Guofeng Cheng
- Shanghai Tenth People’s Hospital, Institute for Infectious Diseases and Vaccine Development, Tongji University School of Medicine, Shanghai, China
- *Correspondence: Guofeng Cheng, ;
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Costain AH, Phythian-Adams AT, Colombo SAP, Marley AK, Owusu C, Cook PC, Brown SL, Webb LM, Lundie RJ, Smits HH, Berriman M, MacDonald AS. Dynamics of Host Immune Response Development During Schistosoma mansoni Infection. Front Immunol 2022; 13:906338. [PMID: 35958580 PMCID: PMC9362740 DOI: 10.3389/fimmu.2022.906338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 05/23/2022] [Indexed: 12/27/2022] Open
Abstract
Schistosomiasis is a disease of global significance, with severity and pathology directly related to how the host responds to infection. The immunological narrative of schistosomiasis has been constructed through decades of study, with researchers often focussing on isolated time points, cell types and tissue sites of interest. However, the field currently lacks a comprehensive and up-to-date understanding of the immune trajectory of schistosomiasis over infection and across multiple tissue sites. We have defined schistosome-elicited immune responses at several distinct stages of the parasite lifecycle, in three tissue sites affected by infection: the liver, spleen, and mesenteric lymph nodes. Additionally, by performing RNA-seq on the livers of schistosome infected mice, we have generated novel transcriptomic insight into the development of schistosome-associated liver pathology and fibrosis across the breadth of infection. Through depletion of CD11c+ cells during peak stages of schistosome-driven inflammation, we have revealed a critical role for CD11c+ cells in the co-ordination and regulation of Th2 inflammation during infection. Our data provide an updated and high-resolution account of how host immune responses evolve over the course of murine schistosomiasis, underscoring the significance of CD11c+ cells in dictating host immunopathology against this important helminth infection.
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Affiliation(s)
- Alice H Costain
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, United Kingdom
- Department of Parasitology, Leiden University Medical Center, Leiden, Netherlands
| | - Alexander T Phythian-Adams
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, United Kingdom
| | - Stefano A P Colombo
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, United Kingdom
| | - Angela K Marley
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, United Kingdom
| | - Christian Owusu
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Peter C Cook
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, United Kingdom
- Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, United Kingdom
| | - Sheila L Brown
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, United Kingdom
| | - Lauren M Webb
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, United Kingdom
- Department of Immunology, University of Washington, Seattle, WA, United States
| | | | - Hermelijn H Smits
- Department of Parasitology, Leiden University Medical Center, Leiden, Netherlands
| | - Matthew Berriman
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
- Wellcome Centre for Integrative Parasitology, University of Glasgow, Glasgow, United Kingdom
| | - Andrew S MacDonald
- Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, United Kingdom
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Nation CS, Da’dara AA, Elzoheiry M, Skelly PJ. Schistosomes Impede ATP-Induced T Cell Apoptosis In Vitro: The Role of Ectoenzyme SmNPP5. Pathogens 2022; 11:pathogens11020155. [PMID: 35215099 PMCID: PMC8878264 DOI: 10.3390/pathogens11020155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/18/2022] [Accepted: 01/22/2022] [Indexed: 02/08/2023] Open
Abstract
Schistosomes (blood flukes) can survive in the bloodstream of their hosts for many years. We hypothesize that proteins on their host-interactive surface impinge on host biochemistry to help ensure their long-term survival. Here, we focus on a surface ectoenzyme of Schistosoma mansoni, designated SmNPP5. This ~53 kDa glycoprotein is a nucleotide pyrophosphatase/phosphodiesterase that has been previously shown to: (1) cleave adenosine diphosphate (ADP) and block platelet aggregation; and (2) cleave nicotinamide adenine dinucleotide (NAD) and block NAD-induced T cell apoptosis in vitro. T cell apoptosis can additionally be driven by extracellular adenosine triphosphate (ATP). In this work, we show that adult S. mansoni parasites can inhibit this process. Further, we demonstrate that recombinant SmNPP5 alone can both cleave ATP and impede ATP-induced T cell killing. As immunomodulatory regulatory T cells (Tregs) are especially prone to the induction of these apoptotic pathways, we hypothesize that the schistosome cleavage of both NAD and ATP promotes Treg survival and this helps to create a less immunologically hostile environment for the worms in vivo.
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8
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Schroeter CB, Huntemann N, Bock S, Nelke C, Kremer D, Pfeffer K, Meuth SG, Ruck T. Crosstalk of Microorganisms and Immune Responses in Autoimmune Neuroinflammation: A Focus on Regulatory T Cells. Front Immunol 2021; 12:747143. [PMID: 34691057 PMCID: PMC8529161 DOI: 10.3389/fimmu.2021.747143] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 09/20/2021] [Indexed: 12/22/2022] Open
Abstract
Regulatory T cells (Tregs) are the major determinant of peripheral immune tolerance. Many Treg subsets have been described, however thymus-derived and peripherally induced Tregs remain the most important subpopulations. In multiple sclerosis, a prototypical autoimmune disorder of the central nervous system, Treg dysfunction is a pathogenic hallmark. In contrast, induction of Treg proliferation and enhancement of their function are central immune evasion mechanisms of infectious pathogens. In accordance, Treg expansion is compartmentalized to tissues with high viral replication and prolonged in chronic infections. In friend retrovirus infection, Treg expansion is mainly based on excessive interleukin-2 production by infected effector T cells. Moreover, pathogens seem also to enhance Treg functions as shown in human immunodeficiency virus infection, where Tregs express higher levels of effector molecules such as cytotoxic T-lymphocyte-associated protein 4, CD39 and cAMP and show increased suppressive capacity. Thus, insights into the molecular mechanisms by which intracellular pathogens alter Treg functions might aid to find new therapeutic approaches to target central nervous system autoimmunity. In this review, we summarize the current knowledge of the role of pathogens for Treg function in the context of autoimmune neuroinflammation. We discuss the mechanistic implications for future therapies and provide an outlook for new research directions.
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Affiliation(s)
- Christina B Schroeter
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Niklas Huntemann
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Stefanie Bock
- Department of Neurology With Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Christopher Nelke
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - David Kremer
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Klaus Pfeffer
- Institute of Medical Microbiology and Hospital Hygiene, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Sven G Meuth
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Tobias Ruck
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
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Zhang Y, Li J, Li H, Zhou Z, Guo C, Jiang J, Ming Y. A preliminary investigation into the immune cell landscape of schistosome-associated liver fibrosis in humans. Immunol Cell Biol 2021; 99:803-813. [PMID: 34355810 PMCID: PMC8456952 DOI: 10.1111/imcb.12490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/05/2021] [Accepted: 07/02/2021] [Indexed: 11/26/2022]
Abstract
Schistosomiasis is a widespread helminth disease that poses a heavy social and economic burden on people worldwide. Advanced schistosomiasis often develops into schistosome‐associated liver fibrosis, the pathogenesis of which remains unclear. This study aimed preliminarily to profile immune cells of schistosome‐associated liver fibrosis using single‐cell RNA sequencing. Three patient groups were enrolled, including an Schistosomiasis japonicum (SJ) group (n = 1), a chronic liver failure (CLF) group (n = 3) and a healthy control (HC) group (n = 2), revealing 17 cell clusters out of 20 093 cells. From these limited datasets, it was observed that T cell(1), mononuclear phagocytes‐1 and dendritic cells (DCs) were higher in the SJ group. CAVIN2+ MP(2) was the predominant cell type in the MP subset of the SJ group (53%), and was higher than that in both the CLF (8%) and HC (1%) groups. Kupffer cell marker genes (CD163, MARCO and TIMD4) were enriched in caveolae‐associated protein 2 (CAVIN2)+ MP(2), which was also an important source of TGFB1. The KEGG pathways of CAVIN2+ MP(2) indicated that they were associated with lysosome, endocytosis, phagosome and antigen processing and presentation. The preliminary study showed that granzyme B (GZMB)+ T cell(1) and ankyrin repeat domain‐containing protein 36B+ T cell(3) were the most common T cells in the SJ group (50% and 32%, respectively). The KEGG pathways of GZMB+ T cell(1) were mainly related to natural killer cell‐mediated cytotoxicity. The percentage of ring1 and YY1 binding protein (RYBP)+ DC(1) was higher in the SJ group (57%) than in the CLF (16%) and HC (6%) groups. The KEGG pathway of RYBP+ DC(1) was related to Fc gamma R‐mediated phagocytosis and antigen processing and presentation. Overall, CAVIN2+ Kupffer cells were the main source of TGFB1, consisting primarily of mononuclear phagocytes in the livers of the SJ group subjects and potentially playing an irreplaceable role in hepatic fibrosis of schistosomiasis.
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Affiliation(s)
- Yu Zhang
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Junhui Li
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hao Li
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhaoqin Zhou
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chen Guo
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jie Jiang
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yingzi Ming
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China.,Engineering and Technology Research Center for Transplantation Medicine of National Health Commission, Changsha, Hunan, China
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10
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Chulanetra M, Chaicumpa W. Revisiting the Mechanisms of Immune Evasion Employed by Human Parasites. Front Cell Infect Microbiol 2021; 11:702125. [PMID: 34395313 PMCID: PMC8358743 DOI: 10.3389/fcimb.2021.702125] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/25/2021] [Indexed: 12/14/2022] Open
Abstract
For the establishment of a successful infection, i.e., long-term parasitism and a complete life cycle, parasites use various diverse mechanisms and factors, which they may be inherently bestowed with, or may acquire from the natural vector biting the host at the infection prelude, or may take over from the infecting host, to outmaneuver, evade, overcome, and/or suppress the host immunity, both innately and adaptively. This narrative review summarizes the up-to-date strategies exploited by a number of representative human parasites (protozoa and helminths) to counteract the target host immune defense. The revisited information should be useful for designing diagnostics and therapeutics as well as vaccines against the respective parasitic infections.
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Affiliation(s)
- Monrat Chulanetra
- Center of Research Excellence on Therapeutic Proteins and Antibody Engineering, Department of Parasitology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wanpen Chaicumpa
- Center of Research Excellence on Therapeutic Proteins and Antibody Engineering, Department of Parasitology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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11
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Oliveira NF, Silva CLM. Unveiling the Potential of Purinergic Signaling in Schistosomiasis Treatment. Curr Top Med Chem 2021; 21:193-204. [PMID: 32972342 DOI: 10.2174/1568026620666200924115113] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 08/15/2020] [Accepted: 08/24/2020] [Indexed: 11/22/2022]
Abstract
Schistosomiasis is a neglected tropical disease. It is related to long-lasting granulomatous fibrosis and inflammation of target organs, and current sub-optimal pharmacological treatment creates global public health concerns. Intravascular worms and eggs release antigens and extracellular vesicles that target host endothelial cells, modulate the immune system, and stimulate the release of damageassociated molecular patterns (DAMPs). ATP, one of the most studied DAMPs, triggers a cascade of autocrine and paracrine actions through purinergic P2X and P2Y receptors, which are shaped by ectonucleotidases (CD39). Both P2 receptor families, and in particular P2Y1, P2Y2, P2Y12, and P2X7 receptors, have been attracting increasing interest in several inflammatory diseases and drug development. Current data obtained from the murine model unveiled a CD39-ADP-P2Y1/P2Y12 receptors signaling pathway linked to the liver and mesenteric exacerbations of schistosomal inflammation. Therefore, we proposed that members of this purinergic signaling could be putative pharmacological targets to reduce schistosomal morbidity.
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Affiliation(s)
- Nathália Ferreira Oliveira
- Laboratory of Molecular and Biochemical Pharmacology, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Claudia Lucia Martins Silva
- Laboratory of Molecular and Biochemical Pharmacology, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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12
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Zografou C, Vakrakou AG, Stathopoulos P. Short- and Long-Lived Autoantibody-Secreting Cells in Autoimmune Neurological Disorders. Front Immunol 2021; 12:686466. [PMID: 34220839 PMCID: PMC8248361 DOI: 10.3389/fimmu.2021.686466] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 05/28/2021] [Indexed: 12/24/2022] Open
Abstract
As B cells differentiate into antibody-secreting cells (ASCs), short-lived plasmablasts (SLPBs) are produced by a primary extrafollicular response, followed by the generation of memory B cells and long-lived plasma cells (LLPCs) in germinal centers (GCs). Generation of IgG4 antibodies is T helper type 2 (Th2) and IL-4, -13, and -10-driven and can occur parallel to IgE, in response to chronic stimulation by allergens and helminths. Although IgG4 antibodies are non-crosslinking and have limited ability to mobilize complement and cellular cytotoxicity, when self-tolerance is lost, they can disrupt ligand-receptor binding and cause a wide range of autoimmune disorders including neurological autoimmunity. In myasthenia gravis with predominantly IgG4 autoantibodies against muscle-specific kinase (MuSK), it has been observed that one-time CD20+ B cell depletion with rituximab commonly leads to long-term remission and a marked reduction in autoantibody titer, pointing to a short-lived nature of autoantibody-secreting cells. This is also observed in other predominantly IgG4 autoantibody-mediated neurological disorders, such as chronic inflammatory demyelinating polyneuropathy and autoimmune encephalitis with autoantibodies against the Ranvier paranode and juxtaparanode, respectively, and extends beyond neurological autoimmunity as well. Although IgG1 autoantibody-mediated neurological disorders can also respond well to rituximab induction therapy in combination with an autoantibody titer drop, remission tends to be less long-lasting and cases where titers are refractory tend to occur more often than in IgG4 autoimmunity. Moreover, presence of GC-like structures in the thymus of myasthenic patients with predominantly IgG1 autoantibodies against the acetylcholine receptor and in ovarian teratomas of autoimmune encephalitis patients with predominantly IgG1 autoantibodies against the N‐methyl‐d‐aspartate receptor (NMDAR) confers increased the ability to generate LLPCs. Here, we review available information on the short-and long-lived nature of ASCs in IgG1 and IgG4 autoantibody-mediated neurological disorders and highlight common mechanisms as well as differences, all of which can inform therapeutic strategies and personalized medical approaches.
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Affiliation(s)
- C Zografou
- Institute of Neuropathology, University of Zurich, Zurich, Switzerland
| | - A G Vakrakou
- First Department of Neurology, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - P Stathopoulos
- First Department of Neurology, National and Kapodistrian University of Athens Medical School, Athens, Greece
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13
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Mawa PA, Kincaid-Smith J, Tukahebwa EM, Webster JP, Wilson S. Schistosomiasis Morbidity Hotspots: Roles of the Human Host, the Parasite and Their Interface in the Development of Severe Morbidity. Front Immunol 2021; 12:635869. [PMID: 33790908 PMCID: PMC8005546 DOI: 10.3389/fimmu.2021.635869] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 02/25/2021] [Indexed: 12/14/2022] Open
Abstract
Schistosomiasis is the second most important human parasitic disease in terms of socioeconomic impact, causing great morbidity and mortality, predominantly across the African continent. For intestinal schistosomiasis, severe morbidity manifests as periportal fibrosis (PPF) in which large tracts of macro-fibrosis of the liver, visible by ultrasound, can occlude the main portal vein leading to portal hypertension (PHT), sequelae such as ascites and collateral vasculature, and ultimately fatalities. For urogenital schistosomiasis, severe morbidity manifests as pathology throughout the urinary system and genitals, and is a definitive cause of squamous cell bladder carcinoma. Preventative chemotherapy (PC) programmes, delivered through mass drug administration (MDA) of praziquantel (PZQ), have been at the forefront of schistosomiasis control programmes in sub-Saharan Africa since their commencement in Uganda in 2003. However, despite many successes, 'biological hotspots' (as distinct from 'operational hotspots') of both persistent high transmission and morbidity remain. In some areas, this failure to gain control of schistosomiasis has devastating consequences, with not only persistently high infection intensities, but both "subtle" and severe morbidity remaining prevalent. These hotspots highlight the requirement to revisit research into severe morbidity and its mechanisms, a topic that has been out of favor during times of PC implementation. Indeed, the focality and spatially-structured epidemiology of schistosomiasis, its transmission persistence and the morbidity induced, has long suggested that gene-environmental-interactions playing out at the host-parasite interface are crucial. Here we review evidence of potential unique parasite factors, host factors, and their gene-environmental interactions in terms of explaining differential morbidity profiles in the human host. We then take the situation of schistosomiasis mansoni within the Albertine region of Uganda as a case study in terms of elucidating the factors behind the severe morbidity observed and the avenues and directions for future research currently underway within a new research and clinical trial programme (FibroScHot).
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Affiliation(s)
- Patrice A. Mawa
- Immunomodulation and Vaccines Programme, Medical Research Council-Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine (MRC/UVRI and LSHTM) Uganda Research Unit, Entebbe, Uganda
- Department of Immunology, Uganda Virus Research Institute, Entebbe, Uganda
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Julien Kincaid-Smith
- Centre for Emerging, Endemic and Exotic Diseases (CEEED), Department of Pathobiology and Population Sciences (PPS), Royal Veterinary College, University of London, Herts, United Kingdom
| | | | - Joanne P. Webster
- Centre for Emerging, Endemic and Exotic Diseases (CEEED), Department of Pathobiology and Population Sciences (PPS), Royal Veterinary College, University of London, Herts, United Kingdom
| | - Shona Wilson
- Department of Pathology, University of Cambridge, Cambridge, United Kingdom
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14
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Maggi L, Rocha IC, Camelo GMA, Fernandes VR, Negrão-Corrêa D. The IL-33/ST2 pathway is not essential to Th2 stimulation but is key for modulation and survival during chronic infection with Schistosoma mansoni in mice. Cytokine 2020; 138:155390. [PMID: 33341001 DOI: 10.1016/j.cyto.2020.155390] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 11/11/2020] [Accepted: 11/25/2020] [Indexed: 12/30/2022]
Abstract
Morbidity during chronic schistosomiasis has been associated with the induction and modulation of type-2 granulomatous inflammatory response induced by antigens secreted by the eggs, which become trapped in capillary venules of the host tissues, especially in the liver and intestines. IL-33, an alarmin released after cell damage, binds to its ST2 (suppressor of tumorigenicity 2) receptor, expressed in an variety of immune cells, including ILC2 and macrophages, and stimulates the early production of IL-5 and IL-13, which leads to eosinophil infiltration and activation of a Th2 response. However, the role of IL-33/ST2 activation on Schistosoma-induced granuloma formation and modulation is mostly unknown. In the current work, we comparatively evaluated the immune response and granuloma formation in wild-type BALB/c (WT) and BALB/c mice genetically deficient in the IL-33 receptor (ST2-/-) experimentally infected with Schistosoma mansoni. Mice were infected with 25 or 50 S. mansoni cercariae and followed for up to 14 weeks to assess mortality. Mice from each experimental group were comparatively evaluated for parasite burden, liver immune response, and granuloma appearance during acute and chronic schistosomiasis. Our data showed that the number of circulating worms and eggs retained in the liver and eliminated in the feces was similar in WT and ST2-/- infected mice, but infected ST2-/- mice presented an enhanced rate of mortality. Interestingly, the production of type-2 cytokines by soluble egg antigens (SEA)-stimulated spleen cells, the serum concentrations of IL-5 and Immunoglobulin (Ig)-E, and the level of parasite-reactive IgG1 were similar in infected mice of both experimental groups. The concentrations of IL-4, IL-5, IL-13, and IFN-γ in liver homogenate of infected mice also did not differ between the strains at acute schistosomiasis, but there was a significant increase in IL-17 levels in ST2-/- infected mice at this phase. On the other hand, IL-4, IL-13, IL-10, IL-17, and IFN-γ concentrations were reduced and the ratios of IL-4/IFN-γ and IL-17/IFN-γ were higher in liver homogenate of chronically infected ST2-/- mice, suggesting unbalanced Th2 and Th17 responses. Moreover, liver granulomas of ST2-/- mice were larger and disorganized, showing an intense cellular infiltrate, rich in eosinophils and neutrophils. Our results suggest that the absence of the IL-33/ST2 pathway is not essential for the Schistosoma-induced Th2 response, but is necessary to prevent host mortality by modulating granuloma-mediated pathology.
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Affiliation(s)
- Laura Maggi
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Izabella Chrystina Rocha
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Curso de Enfermagem, Instituto de Ciências Biológicas e Saúde, Universidade Federal de Mato Grosso, Barra do Garça, Brazil
| | - Genil Mororó Araújo Camelo
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Vanessa Rodrigues Fernandes
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Deborah Negrão-Corrêa
- Laboratório de Esquistossomose e Imunohelmintologia, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
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15
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Valero MA, Gironès N, Reguera-Gomez M, Pérez-Crespo I, López-García MP, Quesada C, Bargues MD, Fresno M, Mas-Coma S. Impact of fascioliasis reinfection on Fasciola hepatica egg shedding: relationship with the immune-regulatory response. Acta Trop 2020; 209:105518. [PMID: 32371223 DOI: 10.1016/j.actatropica.2020.105518] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 04/07/2020] [Accepted: 04/24/2020] [Indexed: 11/29/2022]
Abstract
Fascioliasis is a disease caused by liver flukes. In human fascioliasis hyperendemic areas, reinfection and chronicity are the norm. Control strategies in humans require the use of egg count techniques to calculate the appropriate treatment dose for colic risk prevention. The present study investigates how fascioliasis reinfection affects liver fluke egg shedding and its relationship with the immune-regulatory response. The experimental design reproduced the usual reinfection/chronicity conditions in human fascioliasis endemic areas and included Fasciola hepatica primo-infected Wistar rats (PI) and rats reinfected at 4 weeks (R4), 8 weeks (R8), 12 weeks (R12), and negative control rats. In a longitudinal study (0-20 weeks post-infection, p.i.), serical IgG1 levels and eggs per gram of faeces (epg) were analyzed. In a cross-sectional study, the expression of the genes associated with Th1 (Ifng, Il12a, Il12b, Nos2), Th2 (Il4, Arg1), Treg (Foxp3, Il10, Tgfb, Ebi3), and Th17 (Il17) in the spleen and thymus was analyzed. In R8 and R12, transiently higher averages of epg and epg/worm in reinfected groups vs PI group were detected at least in the weeks following reinfection. The kinetics of IgG1 levels shows that reinfected groups followed a pattern similar to the one in the PI group, but transiently higher averages of IgG1 levels in reinfected groups vs the PI group were detected in the weeks following reinfection. Epg correlated with IgG1 levels and also with systemic Il10 and thymic Ifng, and Il10 expression levels. These results suggest that epg depends on the Th1 and Treg phenotype and that the determination of the fluke burden by epg is likely to be an overestimation in cases of recent reinfection in low burden situations. A strategy to facilitate the implementation of epg count techniques and the subsequent decision on the appropriate treatment dose for each patient to prevent colic risk is required.
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Affiliation(s)
- M Adela Valero
- Departamento de Parasitología, Facultad de Farmacia, Universidad de Valencia, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain.
| | - Nuria Gironès
- Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain.
| | - Marta Reguera-Gomez
- Departamento de Parasitología, Facultad de Farmacia, Universidad de Valencia, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain.
| | - Ignacio Pérez-Crespo
- Departamento de Parasitología, Facultad de Farmacia, Universidad de Valencia, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - M Pilar López-García
- Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad de Valencia, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - Carla Quesada
- Departamento de Parasitología, Facultad de Farmacia, Universidad de Valencia, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - M Dolores Bargues
- Departamento de Parasitología, Facultad de Farmacia, Universidad de Valencia, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain.
| | - Manuel Fresno
- Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
| | - Santiago Mas-Coma
- Departamento de Parasitología, Facultad de Farmacia, Universidad de Valencia, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain.
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16
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Zheng B, Zhang J, Chen H, Nie H, Miller H, Gong Q, Liu C. T Lymphocyte-Mediated Liver Immunopathology of Schistosomiasis. Front Immunol 2020; 11:61. [PMID: 32132991 PMCID: PMC7040032 DOI: 10.3389/fimmu.2020.00061] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 01/10/2020] [Indexed: 12/16/2022] Open
Abstract
The parasitic worms, Schistosoma mansoni and Schistosoma japonicum, reside in the mesenteric veins, where they release eggs that induce a dramatic granulomatous response in the liver and intestines. Subsequently, infection may further develop into significant fibrosis and portal hypertension. Over the past several years, uncovering the mechanism of immunopathology in schistosomiasis has become a major research objective. It is known that T lymphocytes, especially CD4+ T cells, are essential for immune responses against Schistosoma species. However, obtaining a clear understanding of how T lymphocytes regulate the pathological process is proving to be a daunting challenge. To date, CD4+ T cell subsets have been classified into several distinct T helper (Th) phenotypes including Th1, Th2, Th17, T follicular helper cells (Tfh), Th9, and regulatory T cells (Tregs). In the case of schistosomiasis, the granulomatous inflammation and the chronic liver pathology are critically regulated by the Th1/Th2 responses. Animal studies suggest that there is a moderate Th1 response to parasite antigens during the acute stage, but then, egg-derived antigens induce a sustained and dominant Th2 response that mediates granuloma formation and liver fibrosis. In addition, the newly discovered Th17 cells also play a critical role in the hepatic immunopathology of schistosomiasis. Within the liver, Tregs are recruited to hepatic granulomas and exert an immunosuppressive role to limit the granulomatous inflammation and fibrosis. Moreover, recent studies have shown that Tfh and Th9 cells might also promote liver granulomas and fibrogenesis in the murine schistosomiasis. Thus, during infection, T-cell subsets undergo complicated cross-talk with antigen presenting cells that then defines their various roles in the local microenvironment for regulating the pathological progression of schistosomiasis. This current review summarizes a vast body of literature to elucidate the contribution of T lymphocytes and their associated cytokines in the immunopathology of schistosomiasis.
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Affiliation(s)
- Bing Zheng
- Department of Immunology, School of Medicine, Yangtze University, Jingzhou, China.,Clinical Molecular Immunology Center, School of Medicine, Yangtze University, Jingzhou, China
| | - Jianqiang Zhang
- Department of Immunology, School of Medicine, Yangtze University, Jingzhou, China
| | - Hui Chen
- Department of Immunology, School of Medicine, Yangtze University, Jingzhou, China
| | - Hao Nie
- Department of Immunology, School of Medicine, Yangtze University, Jingzhou, China.,Clinical Molecular Immunology Center, School of Medicine, Yangtze University, Jingzhou, China
| | - Heather Miller
- Department of Intracellular Pathogens, National Institute of Allergy and Infectious Diseases, Bethesda, MD, United States
| | - Quan Gong
- Department of Immunology, School of Medicine, Yangtze University, Jingzhou, China.,Clinical Molecular Immunology Center, School of Medicine, Yangtze University, Jingzhou, China
| | - Chaohong Liu
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
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17
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An investigation into the role of chronic Schistosoma mansoni infection on Human Papillomavirus (HPV) vaccine induced protective responses. PLoS Negl Trop Dis 2019; 13:e0007704. [PMID: 31449535 PMCID: PMC6730949 DOI: 10.1371/journal.pntd.0007704] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 09/06/2019] [Accepted: 08/14/2019] [Indexed: 01/09/2023] Open
Abstract
Background Schistosoma mansoni is one of the most common helminth infections affecting a large population of people in sub-Saharan Africa. This helminth infection is known to cause immunomodulation which has affected the efficacy of a number of vaccines. This study examined whether a chronic schistosoma infection has an effect on the immunogenicity of HPV vaccine which is currently administered to girls and women aged 9 to 24. Little is known about the immune responses of the HPV vaccine in individuals with chronic schistosomiasis. Methods This study was carried out at the Institute of Primate Research (IPR) and involved an Olive baboon model. The experimental animals were randomly placed into three groups (n = 3–4); Two groups were infected with S. mansoni cercaria, and allowed to reach chronic stage (week 12 onwards), at week 13 and 14 post-infection, one group was treated with 80mg/kg of praziquantel (PZQ). Sixty four weeks post schistosoma infection, all groups received 2 doses of the Cervarix HPV vaccine a month apart. Specific immune responses to the HPV and parasite specific antigens were evaluated. Results Animals with chronic S. mansoni infection elicited significantly reduced levels of HPV specific IgG antibodies 8 weeks after vaccination compared the PZQ treated and uninfected groups. There was no significant difference in cellular proliferation nor IL-4 and IFN-γ production in all groups. Conclusion Chronic S. mansoni infection results in reduction of protective HPV specific IgG antibodies in a Nonhuman Primate model, suggesting a compromised effect of the vaccine. Treatment of schistosomiasis infection with PZQ prior to HPV vaccination, however, reversed this effect supporting anti-helminthic treatment before vaccination. In sub-Saharan Africa countries, vaccines are administered to people who may suffer from existing infections, especially helminth infections. These infections are known to modulate immune responses rendering some vaccines ineffective. The impact of helminth infections such as schistosomiasis on a recently introduced Human Papillomavirus (HPV) vaccine on infected or treated populations and the degree or duration has not been clearly elucidated. This study was set up to investigate whether a chronic schistosoma infection compromises the specific immune responses elicited by the HPV vaccine.
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18
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Tebeje BM, Harvie M, You H, Rivera V, McManus DP. T cell-mediated immunity in CBA mice during Schistosoma japonicum infection. Exp Parasitol 2019; 204:107725. [PMID: 31306646 DOI: 10.1016/j.exppara.2019.107725] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/23/2019] [Accepted: 07/04/2019] [Indexed: 12/21/2022]
Abstract
Characterisation of the cellular immune response to schistosomiasis is well established for Schistosoma mansoni but a comprehensive description of T cell-mediated immune responses against S. japonicum infection is lacking. Accordingly, 20 CBA mice were infected with cercariae of S. japonicum and the immune response at different time points was determined. Mouse spleen and liver lymphocytes were isolated from the mice and stimulated with schistosomal adult worm antigen preparation (SWAP) and schistosomal soluble egg antigen (SEA). There was a relatively higher Th1 immune response to SWAP compared to SEA at the early phase of infection (up to week 5 post challenge). However, a Th2 immune response directed against SEA was dominant at week 6 post-infection, a time point when the highest IgG response against both SWAP and, especially, SEA was generated. The regulatory immune response was highest at the early phase of the immune response (up to week 5 post challenge) followed by a rapid decline at week 6-post infection. Before egg-laying, S. japonicum induced a regulatory T cell immune response which may limit the early Th1-mediated immune response that is believed to be protective in murine schistosomiasis. Following egg laying, the immune response was polarized to a Th2 immune response mainly directed against the eggs and this may contribute to parasite survival.
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Affiliation(s)
- Biniam Mathewos Tebeje
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, 300 Herston Road, Brisbane, QLD, 4006, Australia; School of Public Health, University of Queensland, Brisbane, Australia.
| | - Marina Harvie
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, 300 Herston Road, Brisbane, QLD, 4006, Australia
| | - Hong You
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, 300 Herston Road, Brisbane, QLD, 4006, Australia
| | - Vanessa Rivera
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, 300 Herston Road, Brisbane, QLD, 4006, Australia
| | - Donald P McManus
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, 300 Herston Road, Brisbane, QLD, 4006, Australia.
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19
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Castro VN, Rodrigues JL, Cardoso DT, Resende SD, Magalhães FC, Souza DC, Requeijo MH, Negrão-Corrêa D, Geiger SM. Systemic Cytokine and Chemokine Profiles in Individuals With Schistosoma mansoni Infection and Low Parasite Burden. Front Immunol 2018; 9:2975. [PMID: 30619332 PMCID: PMC6305627 DOI: 10.3389/fimmu.2018.02975] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/04/2018] [Indexed: 11/13/2022] Open
Abstract
Intestinal schistosomiasis, caused by the parasitic trematode Schistosoma mansoni, is a chronic disease and the prolonged and continuous exposure to S. mansoni antigens results in a deviation of the host's immune response. For diagnosis, the Kato-Katz (KK) method is recommended, however, this method showed low accuracy in areas of low endemicity. This study aimed to characterize the cytokine and chemokine profile of individuals with an extremely low parasite load (<4 eggs per gram of feces), e.g., individuals who were detected by alternative parasitological methods, such as the saline gradient and/or Helmintex®. In order to search for immunological markers for infection, the immunological profile in serum samples of these individuals was then compared with patients detected with the KK method and with a higher parasite load and with individuals repetitively negative by extensive stool exams. The study was conducted in Northern Minas Gerais in a rural area of the Municipality of Januária. Serum samples of a total of 139 parasitologically well-characterized individuals were assessed for the following immunological markers by commercially available immunoassays: TNF-α, IL-1β, IL-6, IL-17A, IL-5, IL-10, IL-13, IL-33, IL-27, CCL3, CCL5, CXCL10, CCL11, and CCL17. As a result, there were no significant differences in concentrations or frequencies for immunological markers between egg-negative individuals or individuals with ultra-low (<4 epg) or low (4-99 epg) parasite loads. However, we found significant correlations between egg counts and eosinophil counts and between egg counts and IL-1β or TNF-α concentrations. The most striking alterations were found in individuals with the highest parasite load (≥100 epg). They had significantly higher TNF-α concentrations in serum when compared with individuals with a low parasite load (4-99 epg) and CCL17 concentrations were significantly elevated when compared with egg-negative individuals. Radar diagrams of frequencies for cytokine and chemokine responders in each infection group confirmed a distinct profile only in the infection group with highest parasite loads (≥100 epg).
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Affiliation(s)
- Vanessa N. Castro
- Department of Parasitology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Jailza L. Rodrigues
- Department of Parasitology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Diogo T. Cardoso
- Department of Parasitology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Samira D. Resende
- Department of Parasitology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Fernanda C. Magalhães
- Department of Parasitology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Dayane C. Souza
- Department of Parasitology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Maira H. Requeijo
- Faculdade da Saúde e Ecologia Humana (FASEH) Vespasiano, Belo Horizonte, Brazil
| | - Deborah Negrão-Corrêa
- Department of Parasitology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Stefan M. Geiger
- Department of Parasitology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
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20
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Stathopoulou C, Gangaplara A, Mallett G, Flomerfelt FA, Liniany LP, Knight D, Samsel LA, Berlinguer-Palmini R, Yim JJ, Felizardo TC, Eckhaus MA, Edgington-Mitchell L, Martinez-Fabregas J, Zhu J, Fowler DH, van Kasteren SI, Laurence A, Bogyo M, Watts C, Shevach EM, Amarnath S. PD-1 Inhibitory Receptor Downregulates Asparaginyl Endopeptidase and Maintains Foxp3 Transcription Factor Stability in Induced Regulatory T Cells. Immunity 2018; 49:247-263.e7. [PMID: 30054205 DOI: 10.1016/j.immuni.2018.05.006] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 04/30/2018] [Accepted: 05/17/2018] [Indexed: 12/11/2022]
Abstract
CD4+ T cell differentiation into multiple T helper (Th) cell lineages is critical for optimal adaptive immune responses. This report identifies an intrinsic mechanism by which programmed death-1 receptor (PD-1) signaling imparted regulatory phenotype to Foxp3+ Th1 cells (denoted as Tbet+iTregPDL1 cells) and inducible regulatory T (iTreg) cells. Tbet+iTregPDL1 cells prevented inflammation in murine models of experimental colitis and experimental graft versus host disease (GvHD). Programmed death ligand-1 (PDL-1) binding to PD-1 imparted regulatory function to Tbet+iTregPDL1 cells and iTreg cells by specifically downregulating endo-lysosomal protease asparaginyl endopeptidase (AEP). AEP regulated Foxp3 stability and blocking AEP imparted regulatory function in Tbet+iTreg cells. Also, Aep-/- iTreg cells significantly inhibited GvHD and maintained Foxp3 expression. PD-1-mediated Foxp3 maintenance in Tbet+ Th1 cells occurred both in tumor infiltrating lymphocytes (TILs) and during chronic viral infection. Collectively, this report has identified an intrinsic function for PD-1 in maintaining Foxp3 through proteolytic pathway.
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Affiliation(s)
| | - Arunakumar Gangaplara
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA
| | - Grace Mallett
- Bio-Imaging Unit, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Francis A Flomerfelt
- Experimental Transplantation Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Lukasz P Liniany
- Bio-Imaging Unit, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - David Knight
- Biological Mass Spectrometry Core, University of Manchester, Manchester M13 9PL, UK
| | - Leigh A Samsel
- Flow Cytometry Core, National Heart, Lung and Blood Institute, NIH, Bethesda, MD 20892, USA
| | | | - Joshua J Yim
- School of Medicine, Stanford University, Stanford, CA 94305, USA
| | - Tania C Felizardo
- Experimental Transplantation Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Michael A Eckhaus
- Division of Veterinary Resources, Office of Research Services, NIH, Bethesda, MD 20892, USA
| | - Laura Edgington-Mitchell
- School of Medicine, Stanford University, Stanford, CA 94305, USA; Drug Discovery Biology, Monash University, Melbourne, VIC 3800, Australia
| | | | - Jinfang Zhu
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA
| | - Daniel H Fowler
- Experimental Transplantation Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Sander I van Kasteren
- Leiden Institute of Chemistry and Institute of Chemical Immunology, Leiden University, 2311 EZ Leiden, the Netherlands
| | - Arian Laurence
- Bio-Imaging Unit, Newcastle University, Newcastle upon Tyne NE2 4HH, UK; Translational Gastroenterology Unit, Experimental Medicine Division, John Radcliffe Hospital, University of Oxford, Headington, Oxford OX3 9DU, UK; Department of Haematology, Northern Centre for Cancer Care, Newcastle upon Tyne NE2 4HH, UK
| | - Matthew Bogyo
- School of Medicine, Stanford University, Stanford, CA 94305, USA
| | - Colin Watts
- College of Life Sciences, University of Dundee, Dundee DD1 4HN, UK
| | - Ethan M Shevach
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA
| | - Shoba Amarnath
- Bio-Imaging Unit, Newcastle University, Newcastle upon Tyne NE2 4HH, UK.
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21
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PPAR- γ Agonist Alleviates Liver and Spleen Pathology via Inducing Treg Cells during Schistosoma japonicum Infection. J Immunol Res 2018; 2018:6398078. [PMID: 30116754 PMCID: PMC6079474 DOI: 10.1155/2018/6398078] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/12/2018] [Accepted: 06/25/2018] [Indexed: 12/31/2022] Open
Abstract
Background Peroxisome proliferator-activated receptor- (PPAR-) γ plays critical roles in human metabolic disorders and has recently been implicated as a regulator of cellular proliferation and inflammatory responses. Regulatory T cells (Tregs), which express high levels of PPAR-γ protein, have the ability to maintain immune tolerance to self-antigens and regulate immune response to Schistosoma infection. However, mechanisms involved in the resolution of these responses are elusive. Methods Liver and spleen tissue samples in Schistosoma japonicum-infected mice after administration of pioglitazone (a PPAR-γ agonist) were collected. The hepatic and splenic pathologies were detected by H&E and Masson staining. The percentages of Th1/2 and Treg cells in the liver and spleen of each mouse were determined using flow cytometry. Levels of gene expression of PPAR-γ and Foxp3 in tissues or cells were determined using real-time PCR (RT-PCR). Macrophages were treated with pioglitazone in vitro or cocultured with normal purified CD4+ T cells for detecting Treg cells by flow cytometry. The interactions of PPAR-γ with Foxp3 in CD4+ T cells were detected by coimmunoprecipitation. Results Administration of pioglitazone resulted in the prevention of the development of hepatic and splenic pathologies. Activation of PPAR-γ by pioglitazone resulted in increased percentages of CD4+CD25+Foxp3+ Treg cells and decreased percentages of CD3+CD4+IFN-γ+ and CD3+CD4+IL-4+ cells in the liver and spleen of Schistosoma japonicum-infected mice. In addition, the PPAR-γ agonist can induce Treg cells in vitro directly or by modulating the macrophage's function indirectly. Furthermore, through interaction with Foxp3 in CD4+ T cells, the PPAR-γ agonist can promote the expression of Foxp3; however, the inhibitor of PPAR-γ weakened the expression of Foxp3 by modifying the coexpression of Foxp3 and PPAR-γ. Conclusions Our study reveals a previously unrecognized role for PPAR-γ/Foxp3 signaling in regulating the immunopathology that occurs during Schistosoma infection through induction of Treg cells.
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22
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Rodrigues-Neto JF, Monteiro GR, Keesen TSL, Lacerda HG, Carvalho EM, Jeronimo SMB. CD45RO+ T Cells and T Cell Activation in the Long-Lasting Immunity after Leishmania infantum Infection. Am J Trop Med Hyg 2017; 98:875-882. [PMID: 29280433 DOI: 10.4269/ajtmh.16-0747] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Manifestations of Leishmania infantum infection range from asymptomatic to symptomatic visceral leishmaniasis (VL). People with symptomatic VL (sVL) have suppressed immune responses against Leishmania antigens that are reversed after clinical cure. The intradermal leishmanin skin test (LST) is negative during sVL, but it becomes positive after treatment. The aim of this study was to compare T cell responses in individuals with sVL, recovered VL (RecVL), and endemic controls. Endemic controls were household contacts of a VL case and they were grouped by their LST results, either positive (LST+) or negative (LST-). Mononuclear cells were studied ex vivo or after stimulation with soluble Leishmania antigens (SLA); cell surface markers and cytokines were determined. T cells, ex vivo, from individuals with sVL and from LST+ individuals presented a higher activation for CD4+ and CD8+ cells expressing CD69. However, lymphocytes from sVL stimulated with SLA had lower percentages of CD4+ and CD8+ cells expressing CD69 and CD8+ cells expressing CD25, with no release of interferon-γ or tumor necrosis factor. sVL subjects had lower percentage of memory cells (CD4+ CD45RO+), ex vivo, without SLA stimulation than RecVL, LST+, or LST- (P = 0.0022). However, individuals with sVL had fewer regulatory cells after SLA stimulation (CD4+ CD25HIGH, P = 0.04 and CD4+ FOXP3+, P = 0.02) than RecVL. The decrease in specific memory and activated CD4+ and CD8+ cells, as in response to Leishmania antigens, could explain, in part, the immune impairment during sVL. Finally, protective T cell responses are long lasting because both RecVL or LST+ individuals maintain a specific protective response to Leishmania years after the primary infection.
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Affiliation(s)
- João F Rodrigues-Neto
- Institute of Tropical Medicine of Rio Grande do Norte, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil.,Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Gloria R Monteiro
- Institute of Tropical Medicine of Rio Grande do Norte, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Tatjana S L Keesen
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Henio G Lacerda
- Department of Infectious Diseases, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil.,Institute of Tropical Medicine of Rio Grande do Norte, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Edgar M Carvalho
- Immunology Service, Federal University of Bahia, Salvador, Bahia, Brazil.,National Institute of Science and Technology of Tropical Diseases (INCT-DT/CNPq), Federal University of Bahia, Salvador, Bahia, Brazil
| | - Selma M B Jeronimo
- National Institute of Science and Technology of Tropical Diseases (INCT-DT/CNPq), Federal University of Bahia, Salvador, Bahia, Brazil.,Institute of Tropical Medicine of Rio Grande do Norte, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil.,Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
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23
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He L, Zhou S, Qi Q, Chi Y, Zhu J, Xu Z, Wang X, Hoellwarth J, Liu F, Chen X, Su C. The regulation of regulation: interleukin-10 increases CD4 + CD25 + regulatory T cells but impairs their immunosuppressive activity in murine models with schistosomiasis japonica or asthma. Immunology 2017; 153:84-96. [PMID: 28799262 DOI: 10.1111/imm.12813] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 08/02/2017] [Accepted: 08/04/2017] [Indexed: 12/13/2022] Open
Abstract
CD4+ CD25+ Foxp3+ regulatory T (Treg) cells play an important role in maintaining immune homeostasis. Interleukin-10 (IL-10), a cytokine with anti-inflammatory capacities, also has a critical role in controlling immune responses. In addition, it is well known that production of IL-10 is one of the suppression mechanisms of Treg cells. However, the action of IL-10 on Treg cells themselves remains insufficiently understood. In this study, by using a Schistosoma japonicum-infected murine model, we show that the elevated IL-10 contributed to Treg cell induction but impaired their immunosuppressive function. Our investigations further suggest that this may relate to the up-regulation of serum transforming growth factor (TGF-β) level but the decrease in membrane-bound TGF-β of Treg cells by IL-10 during S. japonicum infection. In addition, similar IL-10-mediated regulation on Treg cells was also confirmed in the murine model of asthma. In general, our findings identify a previously unrecognized opposing regulation of IL-10 on Treg cells and provide a deep insight into the precise regulation in immune responses.
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Affiliation(s)
- Lei He
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Sha Zhou
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Qianqian Qi
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ying Chi
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jifeng Zhu
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhipeng Xu
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xuefeng Wang
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jason Hoellwarth
- Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Feng Liu
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xiaojun Chen
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Chuan Su
- State Key Lab of Reproductive Medicine, Department of Pathogen Biology and Immunology, Jiangsu Province Key Laboratory of Pathogen Biology, Nanjing Medical University, Nanjing, Jiangsu, China
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24
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Sachdev D, Gough KC, Flynn RJ. The Chronic Stages of Bovine Fasciola hepatica Are Dominated by CD4 T-Cell Exhaustion. Front Immunol 2017; 8:1002. [PMID: 28871261 PMCID: PMC5566560 DOI: 10.3389/fimmu.2017.01002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 08/04/2017] [Indexed: 01/28/2023] Open
Abstract
Fasciola hepatica infection of ruminants leads to non-resolving chronic infection, as patency develops, there is switching to a TGF-β and IL-10 led response. Here, we explore the responses of CD4 T-cells within the major draining lymph nodes. We found minimal expression of Foxp3 within CD4 cells but elevated levels within the γδ (WC1+) population. There is a strong T-cell-intrinsic exhaustion phenotype within the hepatic lymph node (HLN) characterized by a lack of antigen-specific proliferation and cytokine secretion. CD4 T-cells recovered from the HLN had high levels of PD-1 expression and low levels of IL-2 secretion. Exogenous IL-2 partially rescued this defect; when combined with neutralization of IL-10 and TGF-β, full restoration of proliferation, and cytokine production was achieved. Moreover, there is a clear uncoupling of the mechanisms that facilitate this regulation with parasite-specific proliferation and cytokine secretion being governed by independent means. These data would suggest that there is a CD4 T-cell-intrinsic regulation in place early in chronic infection, potentially leading to failure in resistance to reinfection.
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Affiliation(s)
- Divya Sachdev
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, United Kingdom
| | - Kevin C Gough
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, United Kingdom
| | - Robin J Flynn
- Department of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
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25
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Titz TDO, de Araújo CAA, Enobe CS, Rigato PO, Oshiro TM, de Macedo-Soares MF. Ascaris suuminfection modulates inflammation: Implication of CD4+CD25highFoxp3+T cells and IL-10. Parasite Immunol 2017; 39. [DOI: 10.1111/pim.12453] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 07/09/2017] [Indexed: 12/14/2022]
Affiliation(s)
- T. de O. Titz
- Laboratory of Immunopathology; Butantan Institute; São Paulo Brazil
- Laboratorio de Investigacao em Dermatologia e Imunodeficiencias; LIM56; Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de São Paulo; Brazil
| | | | - C. S. Enobe
- Laboratory of Immunopathology; Butantan Institute; São Paulo Brazil
| | - P. O. Rigato
- Center of Immunology; Adolfo Lutz Institute; São Paulo Brazil
| | - T. M. Oshiro
- Laboratorio de Investigacao em Dermatologia e Imunodeficiencias; LIM56; Hospital das Clinicas HCFMUSP; Faculdade de Medicina; Universidade de São Paulo; Brazil
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26
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Stephen-Victor E, Bosschem I, Haesebrouck F, Bayry J. The Yin and Yang of regulatory T cells in infectious diseases and avenues to target them. Cell Microbiol 2017; 19. [DOI: 10.1111/cmi.12746] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Emmanuel Stephen-Victor
- Institut National de la Santé et de la Recherche Médicale; Paris France
- Centre de Recherche des Cordeliers; Equipe-Immunopathologie et Immunointervention Thérapeutique; Paris France
- Sorbonne Universités; Université Pierre et Marie Curie; Paris France
| | - Iris Bosschem
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - Jagadeesh Bayry
- Institut National de la Santé et de la Recherche Médicale; Paris France
- Centre de Recherche des Cordeliers; Equipe-Immunopathologie et Immunointervention Thérapeutique; Paris France
- Sorbonne Universités; Université Pierre et Marie Curie; Paris France
- Université Paris Descartes; Sorbonne Paris Cité; Paris France
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27
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Lee MJ, Choi JH, Lee SJ, Cho IH. Oriental Medicine Samhwangsasim-tang Alleviates Experimental Autoimmune Encephalomyelitis by Suppressing Th1 Cell Responses and Upregulating Treg Cell Responses. Front Pharmacol 2017; 8:192. [PMID: 28458638 PMCID: PMC5394181 DOI: 10.3389/fphar.2017.00192] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 03/24/2017] [Indexed: 01/09/2023] Open
Abstract
Oriental medicine Samhwangsasim-tang (SHSST) has traditionally been used in East Asia to treat hypertension and its complications. However, little is known about its potential value regarding the treatment of chronic inflammatory diseases such as multiple sclerosis (MS). In this study, we investigated whether SHSST has a beneficial effect in treating myelin oligodendrocyte glycoprotein-induced experimental autoimmune encephalomyelitis (EAE). Onset-treatment with SHSST was found to alleviate neurological symptoms as well as demyelination and glial activation in the spinal cords from the EAE mice. The SHSST also attenuated the mRNA or protein expression of pro-inflammatory cytokines (interleukin-1beta and tumor necrotic factor-alpha); chemokines (RANTES, monocyte chemotactic protein-1, and macrophage inflammatory protein-1alpha); inducible nitric oxide synthase; and cyclooxygenase-2 in correspondence with the down-regulation of the nuclear factor-kappa B and mitogen-activated protein kinases signal pathways in the spinal cords from EAE mice. Interestingly, the protective effect of the SHSST was related to a decreased number of Th1 cells and an increased number of Treg cells in spinal cords from EAE mice. Taken together, our finding firstly suggested that SHSST could delay or mitigate EAE with a wide therapeutic time-window by suppressing Th1 cell responses and upregulating Treg cell responses. Also, our findings are strong enough to warrant further investigation of SHSST as a treatment for chronic autoimmune diseases including MS.
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Affiliation(s)
- Min J Lee
- Department of Science in Korean Medicine and Brain Korea 21 Plus Program, Graduate School, Kyung Hee UniversitySeoul, South Korea.,Department of Convergence Medical Science, College of Korean Medicine, Kyung Hee UniversitySeoul, South Korea
| | - Jong H Choi
- Department of Science in Korean Medicine and Brain Korea 21 Plus Program, Graduate School, Kyung Hee UniversitySeoul, South Korea.,Department of Convergence Medical Science, College of Korean Medicine, Kyung Hee UniversitySeoul, South Korea
| | - Sung J Lee
- Department of Neuroscience and Physiology, Dental Research Institute, School of Dentistry, Seoul National UniversitySeoul, South Korea
| | - Ik-Hyun Cho
- Department of Science in Korean Medicine and Brain Korea 21 Plus Program, Graduate School, Kyung Hee UniversitySeoul, South Korea.,Department of Convergence Medical Science, College of Korean Medicine, Kyung Hee UniversitySeoul, South Korea.,Institute of Korean Medicine, College of Korean Medicine, Kyung Hee UniversitySeoul, South Korea
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28
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Ke XD, Shen S, Song LJ, Yu CX, Kikuchi M, Hirayama K, Gao H, Wang J, Yin X, Yao Y, Liu Q, Zhou W. Characterization of Schistosoma japonicum CP1412 protein as a novel member of the ribonuclease T2 molecule family with immune regulatory function. Parasit Vectors 2017; 10:89. [PMID: 28212670 PMCID: PMC5316207 DOI: 10.1186/s13071-016-1962-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 12/29/2016] [Indexed: 01/05/2023] Open
Abstract
Background Schistosome infection typically induces a polarized Th2 type host immune response. As egg antigen molecules play key roles in this immunoregulatory process, clarifying their functions in schistosomiasis would facilitate the development of vaccine and immunotherapeutic methods. Schistosoma japonicum (Sj) CP1412 (GenBank: AY57074.1) has been identified as a new member of the RNase T2 family with immune regulatory functions. Methods The expression plasmid Sj CP1412-pET28a was constructed and transformed into bacteria for production of recombinant Sj CP1412 protein (rSj CP1412) via IPTG induction. The RNase activity of Sj CP1412 was predicted by bioinformatic analysis and confirmed by digesting the yeast tRNA with rSj CP1412.C57BL/6j mice were immunized with rSj CP1412, and its immune regulatory effects in vivo and in vitro were investigated. Meanwhile, the relationship between the RNase activity of Sj CP1412 and its immune regulation was observed. Results Sj CP1412 was confirmed as a novel RNase T2 family protein with RNase activity. Immunoblotting and RT-PCR analyses demonstrated Sj CP1412 as a protein exclusively secreted/excreted from eggs, but not cercariae and adult worms. Stimulating RAW264.7 macrophages with rSj CP1412 raised the expression of CD206, Arg-1 and IL-10, which are related to M2 type macrophage differentiation. Stimulating dendritic cells (DCs) with rSjCP1412 failed to induce their maturation, and the recombinant protein also inhibited LPS-stimulated DC maturation. Depletion of Sj CP1412 from soluble egg antigen (SEA) impaired the ability of SEA to induce M2 type polarization of RAW264.7 macrophages. Immunizing mice with rSj CP1412 induced high antibody titers, increased serum IL-4 and TGF-β levels and splenic CD4 + CD25 + Foxp3 + T cells, downregulated serum IFN-γ levels and alleviated the egg granuloma pathology of schistosome infection. In vitro stimulation by rSj CP1412 significantly increased CD4 + CD25 + Foxp3 + T cell numbers in splenocytes of healthy mice. The rSj CP1412 protein with RNase activity inactivated by DEPC failed to induce M2 surface marker CD206 expression in RAW264.7 macrophages. Conclusions The Sj CP1412 protein expressed specifically in S. japonicum eggs is a novel member of the RNase T2 family. Similar to Omega-1 of Schistosoma mansoni, the Sj CP1412 protein drives polarization of the host Th2 immune response, which is dependent on its RNase activity. These data provide new evidence towards understanding the immune regulatory role of RNase T2 family proteins during schistosome infection. Electronic supplementary material The online version of this article (doi:10.1186/s13071-016-1962-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xue-Dan Ke
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China
| | - Shuang Shen
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China.,Medical College, Jiangnan University, Wuxi, 214122, China.,Public Health Research Center, Jiangnan University, Wuxi, 214122, People's Republic of China.,Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, People's Republic of China
| | - Li-Jun Song
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China
| | - Chuan-Xin Yu
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China. .,Medical College, Jiangnan University, Wuxi, 214122, China. .,Public Health Research Center, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Mihoko Kikuchi
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan
| | - Kenji Hirayama
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan
| | - Hong Gao
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China.,Department of Pathology, Nanjing Drum Tower Hospital, Nanjing, 210003, People's Republic of China
| | - Jie Wang
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China
| | - Xuren Yin
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China
| | - Yuan Yao
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China
| | - Qian Liu
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China
| | - Wei Zhou
- Key Laboratory on Technology for Parasitic Disease Prevention and Control, Ministry of Health; Jiangsu Provincial Key Laboratory on Technology for Parasite and Vector Control, Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, People's Republic of China
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Purinergic signaling in schistosomal infection. Biomed J 2016; 39:316-325. [PMID: 27884378 PMCID: PMC6138794 DOI: 10.1016/j.bj.2016.06.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/27/2016] [Accepted: 06/30/2016] [Indexed: 01/06/2023] Open
Abstract
Human schistosomiasis is a chronic inflammatory disease caused by blood fluke worms belonging to the genus Schistosoma. Health metrics indicate that the disease is related to an elevated number of years lost-to-disability and years lost-to-life. Schistosomiasis is an intravascular disease that is related to a Th1 and Th2 immune response polarization, and the degree of polarization affects the outcome of the disease. The purinergic system is composed of adenosine and nucleotides acting as key messenger molecules. Moreover, nucleotide-transforming enzymes and cell-surface purinergic receptors are obligatory partners of this purinergic signaling. In mammalian cells, purinergic signaling modulates innate immune responses and inflammation among other functions; conversely purinergic signaling may also be modulated by inflammatory mediators. Moreover, schistosomes also express some enzymes of the purinergic system, and it is possible that worms modulate host purinergic signaling. Current data obtained in murine models of schistosomiasis support the notion that the host purinergic system is altered by the disease. The dysfunction of adenosine receptors, metabotropic P2Y and ionotropic P2X7 receptors, and NTPDases likely contributes to disease morbidity.
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Sulaiman AA, Zolnierczyk K, Japa O, Owen JP, Maddison BC, Emes RD, Hodgkinson JE, Gough KC, Flynn RJ. A Trematode Parasite Derived Growth Factor Binds and Exerts Influences on Host Immune Functions via Host Cytokine Receptor Complexes. PLoS Pathog 2016; 12:e1005991. [PMID: 27806135 PMCID: PMC5091765 DOI: 10.1371/journal.ppat.1005991] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 10/11/2016] [Indexed: 12/03/2022] Open
Abstract
The trematode Fasciola hepatica is responsible for chronic zoonotic infection globally. Despite causing a potent T-helper 2 response, it is believed that potent immunomodulation is responsible for rendering this host reactive non-protective host response thereby allowing the parasite to remain long-lived. We have previously identified a growth factor, FhTLM, belonging to the TGF superfamily can have developmental effects on the parasite. Herein we demonstrate that FhTLM can exert influence over host immune functions in a host receptor specific fashion. FhTLM can bind to receptor members of the Transforming Growth Factor (TGF) superfamily, with a greater affinity for TGF-β RII. Upon ligation FhTLM initiates the Smad2/3 pathway resulting in phenotypic changes in both fibroblasts and macrophages. The formation of fibroblast CFUs is reduced when cells are cultured with FhTLM, as a result of TGF-β RI kinase activity. In parallel the wound closure response of fibroblasts is also delayed in the presence of FhTLM. When stimulated with FhTLM blood monocyte derived macrophages adopt an alternative or regulatory phenotype. They express high levels interleukin (IL)-10 and arginase-1 while displaying low levels of IL-12 and nitric oxide. Moreover they also undergo significant upregulation of the inhibitory receptor PD-L1 and the mannose receptor. Use of RNAi demonstrates that this effect is dependent on TGF-β RII and mRNA knock-down leads to a loss of IL-10 and PD-L1. Finally, we demonstrate that FhTLM aids newly excysted juveniles (NEJs) in their evasion of antibody-dependent cell cytotoxicity (ADCC) by reducing the NO response of macrophages—again dependent on TGF-β RI kinase. FhTLM displays restricted expression to the F. hepatica gut resident NEJ stages. The altered fibroblast responses would suggest a role for dampened tissue repair responses in facilitating parasite migration. Furthermore, the adoption of a regulatory macrophage phenotype would allow for a reduced effector response targeting juvenile parasites which we demonstrate extends to an abrogation of the ADCC response. Thus suggesting that FhTLM is a stage specific evasion molecule that utilises host cytokine receptors. These findings are the first to clearly demonstrate the interaction of a helminth cytokine with a host receptor complex resulting in immune modifications that facilitate the non-protective chronic immune response which is characteristic of F. hepatica infection. Parasitic worms, helminths, can cause long-lived chronic infection in many hosts that they infection. The liver fluke, Fasciola hepatica, is one such parasite causing global infection of both humans and animals. F. hepatica exerts an influence over the immune system such that it avoids effector mechanisms and prevents the development of effective immunity. Here we characterise a molecule—FhTLM—derived from juvenile parasites that is similar to the regulatory cytokine TGF-β. We show that FhTLM will bind to host TGF-β receptors with a reduced affinity when compared with mammalian TGF-β. Despite this FhTLM can induce Smad2/3 signalling in host leukocytes, which is key to initiating gene transcription. Phenotypically FhTLM causes fibroblasts to slow their growth and replication response resulting in slower wound healing. Importantly FhTLM induces a macrophage phenotype that resembles a regulatory macrophage phenotype identified in other species undergoing helminth infection. Finally we Our work highlights the potential of FhTLM to play important roles in controlling host immunity when initially infected with juvenile parasites, thereby preventing the development of effective immunity.
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Affiliation(s)
- Azad A. Sulaiman
- School of Veterinary Medicine and Science, the University of Nottingham, Sutton Bonington Campus, Nottingham, United Kingdom
| | - Katarzyna Zolnierczyk
- School of Veterinary Medicine and Science, the University of Nottingham, Sutton Bonington Campus, Nottingham, United Kingdom
| | - Ornampai Japa
- School of Veterinary Medicine and Science, the University of Nottingham, Sutton Bonington Campus, Nottingham, United Kingdom
- School of Medicine, University of Phayao, Phayao, Thailand
| | - Jonathan P. Owen
- ADAS UK, the University of Nottingham, Sutton Bonington Campus, Nottingham, United Kingdom
| | - Ben C. Maddison
- ADAS UK, the University of Nottingham, Sutton Bonington Campus, Nottingham, United Kingdom
| | - Richard D. Emes
- School of Veterinary Medicine and Science, the University of Nottingham, Sutton Bonington Campus, Nottingham, United Kingdom
| | - Jane E. Hodgkinson
- Department of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - Kevin C. Gough
- School of Veterinary Medicine and Science, the University of Nottingham, Sutton Bonington Campus, Nottingham, United Kingdom
| | - Robin J. Flynn
- Department of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
- * E-mail:
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31
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Kaewraemruaen C, Sermswan RW, Wongratanacheewin S. Induction of regulatory T cells by Opisthorchis viverrini. Parasite Immunol 2016; 38:688-697. [PMID: 27552546 DOI: 10.1111/pim.12358] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 08/19/2016] [Indexed: 01/04/2023]
Abstract
Opisthorchis viverrini causes public health problems in South-East Asia. Recently, TGF-β and IL-10 have been reported to increase in O. viverrini-infected hamsters but the sources of these cytokines are still unknown. In this study, the CD4+ T cells in infected hamsters were investigated. It was demonstrated that IL-4+ CD4+ T cells were significantly increased in hamster spleens and mesenteric lymph nodes (MLNs) during chronic infection. Interestingly, IL-10+ CD4+ T cells were also discovered at a significant level while Treg (T regulatory)-like TGF- β+ CD4+ T cells were in MLNs of infected hamsters. Moreover, the CD4+ CD25+ Foxp3+ Treg cell response was significantly found both in spleens and MLNs in infected hamsters. The findings were then confirmed by development of T-cell clones against crude somatic antigens (CSAg) in immunized BALB/c mice. Five clones named TCC21, TCC23, TCC35, TCC41 and TCC108 were established. The TCC21 was found to be the TGF-β+ CD4+ while TCC35, TCC41 and TCC108 were IL-4+ CD4+ and TCC23 was IFN-γ+ CD4+ . This TGF-β+ CD4+ T clone showed an inhibitory function in vitro in mononuclear cell proliferation via TGF-β-mediated mechanisms. This study indicated that O. viverrini-infected hamsters could induce TGF-β+ CD4+ Treg-like cells. The CSAg-specific Tregs secreted high TGF-β, and limited immune cell proliferation.
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Affiliation(s)
- C Kaewraemruaen
- Department of Microbiology, Khon Kaen University, Khon Kaen, Thailand.,Melioidosis Research Center, Khon Kaen University, Khon Kaen, Thailand
| | - R W Sermswan
- Melioidosis Research Center, Khon Kaen University, Khon Kaen, Thailand.,Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - S Wongratanacheewin
- Department of Microbiology, Khon Kaen University, Khon Kaen, Thailand. .,Melioidosis Research Center, Khon Kaen University, Khon Kaen, Thailand.
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Prendergast CT, Sanin DE, Mountford AP. CD4 T-cell hyporesponsiveness induced by schistosome larvae is not dependent upon eosinophils but may involve connective tissue mast cells. Parasite Immunol 2016; 38:81-92. [PMID: 26679416 PMCID: PMC4744672 DOI: 10.1111/pim.12300] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 12/07/2015] [Indexed: 12/12/2022]
Abstract
In areas endemic for schistosomiasis, people can often be in contact with contaminated water resulting in repeated exposures to infective Schistosoma mansoni cercariae. Using a murine model, repeated infections result in IL‐10‐dependent CD4+ T‐cell hyporesponsiveness in the skin‐draining lymph nodes (sdLN), which could be caused by an abundance of eosinophils and connective tissue mast cells at the skin infection site. Here, we show that whilst the absence of eosinophils did not have a significant effect on cytokine production, MHC‐II+ cells were more numerous in the dermal cell exudate population. Nevertheless, the absence of dermal eosinophils did not lead to an increase in the responsiveness of CD4+ T cells in the sdLN, revealing that eosinophils in repeatedly exposed skin did not impact on the development of CD4+ T‐cell hyporesponsiveness. On the other hand, the absence of connective tissue mast cells led to a reduction in dermal IL‐10 and to an increase in the number of MHC‐II+ cells infiltrating the skin. There was also a small but significant alleviation of hyporesponsiveness in the sdLN, suggesting that mast cells may have a role in regulating immune responses after repeated exposures of the skin to S. mansoni cercariae.
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Affiliation(s)
- C T Prendergast
- Centre for Immunology and Infection, Department of Biology, University of York, York, UK
| | - D E Sanin
- Centre for Immunology and Infection, Department of Biology, University of York, York, UK
| | - A P Mountford
- Centre for Immunology and Infection, Department of Biology, University of York, York, UK
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33
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Apaer S, Tuxun T, Ma HZ, Zhang H, Aierken A, Aini A, Li YP, Lin RY, Wen H. Parasitic infection as a potential therapeutic tool against rheumatoid arthritis. Exp Ther Med 2016; 12:2359-2366. [PMID: 27698735 DOI: 10.3892/etm.2016.3660] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 07/15/2016] [Indexed: 12/11/2022] Open
Abstract
Parasites, which are a recently discovered yet ancient dweller in human hosts, remain a great public health burden in underdeveloped countries, despite preventative efforts. Rheumatoid arthritis is a predominantly cosmopolitan health problem with drastic morbidity rates, although encouraging progress has been achieved regarding treatment. However, although various types of methods and agents have been applied clinically, their broad usage has been limited by their adverse effects and/or high costs. Sustained efforts have been exerted on the 'hygiene hypothesis' since the 1870s. The immunosuppressive nature of parasitic infections may offer potential insight into therapeutic strategies for rheumatoid arthritis, in which the immune system is overactivated. An increasing number of published papers are focusing on the preventive and/or curative effect of various parasitic infection on rheumatoid arthritis from experimental studies to large-scale epidemiological studies and clinical trials. Therefore, the present review aimed to provide a general literature review on the possible beneficial role of parasitic infection on rheumatoid arthritis.
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Affiliation(s)
- Shadike Apaer
- State Key Laboratory of Xinjiang Major Diseases Research and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China; Department of Liver and Laparoscopic Surgery, Digestive and Vascular Centre, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
| | - Tuerhongjiang Tuxun
- State Key Laboratory of Xinjiang Major Diseases Research and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China; Department of Liver and Laparoscopic Surgery, Digestive and Vascular Centre, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
| | - Hai-Zhang Ma
- State Key Laboratory of Xinjiang Major Diseases Research and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
| | - Heng Zhang
- State Key Laboratory of Xinjiang Major Diseases Research and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
| | - Amina Aierken
- Department of Ultrasonography, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
| | - Abudusalamu Aini
- State Key Laboratory of Xinjiang Major Diseases Research and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
| | - Yu-Peng Li
- State Key Laboratory of Xinjiang Major Diseases Research and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
| | - Ren-Yong Lin
- State Key Laboratory of Xinjiang Major Diseases Research and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
| | - Hao Wen
- State Key Laboratory of Xinjiang Major Diseases Research and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China; Department of Liver and Laparoscopic Surgery, Digestive and Vascular Centre, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China
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34
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Santiago HC, Nutman TB. Human Helminths and Allergic Disease: The Hygiene Hypothesis and Beyond. Am J Trop Med Hyg 2016; 95:746-753. [PMID: 27573628 DOI: 10.4269/ajtmh.16-0348] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 08/01/2016] [Indexed: 01/22/2023] Open
Abstract
There is much debate about the interaction between helminths and allergic disease. The "Hygiene Hypothesis," a very popular concept among scientists and the lay public, states that infections, especially during childhood, can protect against allergic diseases. Indeed, helminth infections are known to induce regulatory responses in the host that can help the control of inflammation (including allergic inflammation). However, these infections also induce type-2-associated immune responses including helminth-specific IgE that can cross-react against environmental allergens and mediate IgE-driven effector responses. Thus, it is the delicate balance between the parasites' anti- and pro-allergenic effects that define the helminth/allergy interface.
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Affiliation(s)
- Helton C Santiago
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
| | - Thomas B Nutman
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
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35
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Billroth-MacLurg AC, Ford J, Rosenberg A, Miller J, Fowell DJ. Regulatory T Cell Numbers in Inflamed Skin Are Controlled by Local Inflammatory Cues That Upregulate CD25 and Facilitate Antigen-Driven Local Proliferation. THE JOURNAL OF IMMUNOLOGY 2016; 197:2208-18. [PMID: 27511734 PMCID: PMC5157695 DOI: 10.4049/jimmunol.1502575] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 07/11/2016] [Indexed: 01/07/2023]
Abstract
CD4(+)Foxp3(+) regulatory T cells (Tregs) are key immune suppressors that regulate immunity in diverse tissues. The tissue and/or inflammatory signals that influence the magnitude of the Treg response remain unclear. To define signals that promote Treg accumulation, we developed a simple system of skin inflammation using defined Ags and adjuvants that induce distinct cytokine milieus: OVA protein in CFA, aluminum salts (Alum), and Schistosoma mansoni eggs (Sm Egg). Polyclonal and Ag-specific Treg accumulation in the skin differed significantly between adjuvants. CFA and Alum led to robust Treg accumulation, with >50% of all skin CD4(+) T cells being Foxp3(+) In contrast, Tregs accumulated poorly in the Sm Egg-inflamed skin. Surprisingly, we found no evidence of inflammation-specific changes to the Treg gene program between adjuvant-inflamed skin types, suggesting a lack of selective recruitment or adaptation to the inflammatory milieu. Instead, Treg accumulation patterns were linked to differences in CD80/CD86 expression by APC and the regulation of CD25 expression, specifically in the inflamed skin. Inflammatory cues alone, without cognate Ag, differentially supported CD25 upregulation (CFA and Alum > Sm Egg). Only in inflammatory milieus that upregulated CD25 did the provision of Ag enhance local Treg proliferation. Reduced IL-33 in the Sm Egg-inflamed environment was shown to contribute to the failure to upregulate CD25. Thus, the magnitude of the Treg response in inflamed tissues is controlled at two interdependent levels: inflammatory signals that support the upregulation of the important Treg survival factor CD25 and Ag signals that drive local expansion.
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Affiliation(s)
- Alison C Billroth-MacLurg
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, Aab Institute of Biomedical Sciences, University of Rochester, Rochester, NY 14642; and
| | - Jill Ford
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, Aab Institute of Biomedical Sciences, University of Rochester, Rochester, NY 14642; and
| | - Alexander Rosenberg
- Division of Allergy, Immunology and Rheumatology, University of Rochester Medical Center, Rochester, NY 14642
| | - Jim Miller
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, Aab Institute of Biomedical Sciences, University of Rochester, Rochester, NY 14642; and
| | - Deborah J Fowell
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, Aab Institute of Biomedical Sciences, University of Rochester, Rochester, NY 14642; and
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36
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Santos PDA, Lorena VMBD, Fernandes ÉDS, Sales IRF, Nascimento WRCD, Gomes YDM, Albuquerque MCPDA, Costa VMA, Souza VMOD. Gestation and breastfeeding in schistosomotic mothers differently modulate the immune response of adult offspring to postnatal Schistosoma mansoni infection. Mem Inst Oswaldo Cruz 2016; 111:83-92. [PMID: 26872339 PMCID: PMC4750447 DOI: 10.1590/0074-02760150293] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 01/06/2016] [Indexed: 01/05/2023] Open
Abstract
Schistosoma mansoni antigens in the early life alter homologous and
heterologous immunity during postnatal infections. We evaluate the immunity to
parasite antigens and ovalbumin (OA) in adult mice born/suckled by schistosomotic
mothers. Newborns were divided into: born (BIM), suckled (SIM) or born/suckled (BSIM)
in schistosomotic mothers, and animals from noninfected mothers (control). When
adults, the mice were infected and compared the hepatic granuloma size and
cellularity. Some animals were OA + adjuvant immunised. We evaluated hypersensitivity
reactions (HR), antibodies levels (IgG1/IgG2a) anti-soluble egg antigen and
anti-soluble worm antigen preparation, and anti-OA, cytokine production, and
CD4+FoxP3+T-cells by splenocytes. Compared to control group,
BIM mice showed a greater quantity of granulomas and collagen deposition, whereas SIM
and BSIM presented smaller granulomas. BSIM group exhibited the lowest levels of
anti-parasite antibodies. For anti-OA immunity, immediate HR was suppressed in all
groups, with greater intensity in SIM mice accompanied of the remarkable level of
basal CD4+FoxP3+T-cells. BIM and SIM groups produced less
interleukin (IL)-4 and interferon (IFN)-g. In BSIM, there was higher
production of IL-10 and IFN-g, but lower levels of IL-4 and
CD4+FoxP3+T-cells. Thus, pregnancy in schistosomotic mothers
intensified hepatic fibrosis, whereas breastfeeding diminished granulomas in
descendants. Separately, pregnancy and breastfeeding could suppress heterologous
immunity; however, when combined, the responses could be partially restored in
infected descendants.
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Affiliation(s)
- Patrícia d'Emery Alves Santos
- Setor de Imunologia, Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, PE, Brasil
| | | | - Érica de Souza Fernandes
- Setor de Imunologia, Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, PE, Brasil
| | - Iana Rafaela Fernandes Sales
- Setor de Imunologia, Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, PE, Brasil
| | | | | | | | - Vlaudia Maria Assis Costa
- Setor de Imunologia, Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, PE, Brasil
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37
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Etewa SE, Hegab MHA, Metwally AS, Abd Allah SH, Shalaby SM, El-Shal AS, Baredy M, El Shafey MA, Moawad HSF. Murine hepatocytes DNA changes as an assessment of the immunogenicity of potential anti-schistosomal vaccines experimentally. J Parasit Dis 2016; 41:219-229. [PMID: 28316416 DOI: 10.1007/s12639-016-0782-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 05/09/2016] [Indexed: 11/29/2022] Open
Abstract
Hepatic affection by granulomatous inflammation in schistosomiasis suggested that a potential anti-pathology vaccine could be generated based on limiting the presence of hazardous hepatocytes induced apoptosis and caused reduction of granulomas number and size . So, this work is concerned with experimental assessment of the efficacy of different Schistosoma mansoni antigens (SEA, SWAP and combined SEA and SWAP) on murine liver after challenge by Schistosoma infection, histopathological, histochemical and molecular investigations were performed on sixty male laboratory bred Swiss Albino mice. A schedule of vaccination and challenge infection was followed and performed on 6 mice groups (each of ten); control normal (G1), control infected (G2), adjuvant received then infected (G3), SEA + adj. received then infected (G4), SWAP + adj. received then infected (G5) and SEA + SWAP + adj. received then infected (G6).Animals were euthanized 10 weeks post infection.Vaccination efficacy was assessed by histopathological, histochemical and molecular studies on murine hepatic tissues.Results showed that:The combined (SEA + SWAP) antigens were better in reducing the number and diameter of the hepatic granulomas, with more protection of the hepatocytes DNA, in addition to more decrease of hepatocytes induced apoptosis and fragmentation as demonstrated by molecular assay.
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Affiliation(s)
- Samia E Etewa
- Medical Parasitology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamed H A Hegab
- Medical Parasitology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ashraf S Metwally
- Medical Parasitology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Somia H Abd Allah
- Biochemistry Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Sally M Shalaby
- Biochemistry Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Amal S El-Shal
- Biochemistry Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamed Baredy
- Histology Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Mahmoud A El Shafey
- Clinical Pathology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Howayda S F Moawad
- Medical Parasitology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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38
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Everts B, Tussiwand R, Dreesen L, Fairfax KC, Huang SCC, Smith AM, O'Neill CM, Lam WY, Edelson BT, Urban JF, Murphy KM, Pearce EJ. Migratory CD103+ dendritic cells suppress helminth-driven type 2 immunity through constitutive expression of IL-12. J Exp Med 2015; 213:35-51. [PMID: 26712805 PMCID: PMC4710198 DOI: 10.1084/jem.20150235] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 11/30/2015] [Indexed: 11/06/2022] Open
Abstract
Everts et al. use Batf3−/− mice to examine the role of Batf3-dependent CD8α+ and CD103+ DCs in Th2 immunity in response to helminth infection. Loss of Batf3-dependent DCs resulted in rapid control of normally chronic infection with Heligmosomoides polygyrus, whereas liver fibrosis was exacerbated with Schistosoma mansoni infection. Mechanistically, steady-state IL-12 production by migratory CD103+ DCs was found to antagonize Th2 responses. CD8α+ and CD103+ dendritic cells (DCs) play a central role in the development of type 1 immune responses. However, their role in type 2 immunity remains unclear. We examined this issue using Batf3−/− mice, in which both of these DC subsets are missing. We found that Th2 cell responses, and related events such as eosinophilia, alternative macrophage activation, and immunoglobulin class switching to IgG1, were enhanced in Batf3−/− mice responding to helminth parasites. This had beneficial or detrimental consequences depending on the context. For example, Batf3 deficiency converted a normally chronic intestinal infection with Heligmosomoides polygyrus into an infection that was rapidly controlled. However, liver fibrosis, an IL-13–mediated pathological consequence of wound healing in chronic schistosomiasis, was exacerbated in Batf3−/− mice infected with Schistosoma mansoni. Mechanistically, steady-state production of IL-12 by migratory CD103+ DCs, independent of signals from commensals or TLR-initiated events, was necessary and sufficient to exert the suppressive effects on Th2 response development. These findings identify a previously unrecognized role for migratory CD103+ DCs in antagonizing type 2 immune responses.
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Affiliation(s)
- Bart Everts
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Roxane Tussiwand
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Leentje Dreesen
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Keke C Fairfax
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Stanley Ching-Cheng Huang
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Amber M Smith
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Christina M O'Neill
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Wing Y Lam
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Brian T Edelson
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Joseph F Urban
- Diet, Genomics, and Immunology Laboratory, Beltsville Human Nutrition Research Center, Agriculture Research Service, US Department of Agriculture, Beltsville, MD 20705
| | - Kenneth M Murphy
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110 Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, MO 63110
| | - Edward J Pearce
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
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CD4+CD25hiFOXP3+ Regulatory T Cells and Cytokine Responses in Human Schistosomiasis before and after Treatment with Praziquantel. PLoS Negl Trop Dis 2015; 9:e0003995. [PMID: 26291831 PMCID: PMC4546370 DOI: 10.1371/journal.pntd.0003995] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 07/17/2015] [Indexed: 01/23/2023] Open
Abstract
Background Chronic schistosomiasis is associated with T cell hypo-responsiveness and immunoregulatory mechanisms, including induction of regulatory T cells (Tregs). However, little is known about Treg functional capacity during human Schistosoma haematobium infection. Methodology CD4+CD25hiFOXP3+ cells were characterized by flow cytometry and their function assessed by analysing total and Treg-depleted PBMC responses to schistosomal adult worm antigen (AWA), soluable egg antigen (SEA) and Bacillus Calmette-Guérin (BCG) in S. haematobium-infected Gabonese children before and 6 weeks after anthelmintic treatment. Cytokines responses (IFN-γ, IL-5, IL-10, IL-13, IL-17 and TNF) were integrated using Principal Component Analysis (PCA). Proliferation was measured by CFSE. Principal Findings S. haematobium infection was associated with increased Treg frequencies, which decreased post-treatment. Cytokine responses clustered into two principal components reflecting regulatory and Th2-polarized (PC1) and pro-inflammatory and Th1-polarized (PC2) cytokine responses; both components increased post-treatment. Treg depletion resulted in increased PC1 and PC2 at both time-points. Proliferation on the other hand, showed no significant difference from pre- to post-treatment. Treg depletion resulted mostly in increased proliferative responses at the pre-treatment time-point only. Conclusions Schistosoma-associated CD4+CD25hiFOXP3+Tregs exert a suppressive effect on both proliferation and cytokine production. Although Treg frequency decreases after praziquantel treatment, their suppressive capacity remains unaltered when considering cytokine production whereas their influence on proliferation weakens with treatment. Schistosomiasis, a parasitic worm infection, affects over 240 million people worldwide, especially children in sub-Saharan Africa. It is associated with immune hypo-responsiveness which results in an inability of the immune system to eliminate parasites. Animal models suggest that helminths induce regulatory T cells (Treg) which suppress effector cells and dampen anti-parasite activity as part of the parasites’ own strategy for survival in the human host. However, little is known about the functional capacity of Tregs during human Schistosoma haematobium infection and their interaction with adaptive responses. We designed a longitudinal study addressing the question of how anti-parasite treatment influences effector T cell activity and Treg function in peripheral blood of schoolchildren living in an S. haematobium endemic area in Lambaréné, Gabon. Our findings show that schistosome infection is associated with increased Treg frequency and that Tregs exert a suppressive effect on immune cell function in terms of both proliferation and cytokine production. Although Treg frequency decreases after anti-schistosome treatment, their suppressive capacity remains unaltered for cytokine production but their influence on proliferation weakens with treatment. By understanding how immune system is prevented from killing parasites, we hope to offer a novel route for intervention to achieve an immunological cure.
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Schistosoma mansoni Larvae Do Not Expand or Activate Foxp3+ Regulatory T Cells during Their Migratory Phase. Infect Immun 2015. [PMID: 26195548 PMCID: PMC4567639 DOI: 10.1128/iai.00408-15] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Foxp3+ regulatory T (Treg) cells play a key role in suppression of immune responses during parasitic helminth infection, both by controlling damaging immunopathology and by inhibiting protective immunity. During the patent phase of Schistosoma mansoni infection, Foxp3+ Treg cells are activated and suppress egg-elicited Th2 responses, but little is known of their induction and role during the early prepatent larval stage of infection. We quantified Foxp3+ Treg cell responses during the first 3 weeks of murine S. mansoni infection in C57BL/6 mice, a time when larval parasites migrate from the skin and transit the lungs en route to the hepatic and mesenteric vasculature. In contrast to other helminth infections, S. mansoni did not elicit a Foxp3+ Treg cell response during this early phase of infection. We found that the numbers and proportions of Foxp3+ Treg cells remained unchanged in the lungs, draining lymph nodes, and spleens of infected mice. There was no increase in the activation status of Foxp3+ Treg cells upon infection as assessed by their expression of CD25, Foxp3, and Helios. Furthermore, infection failed to induce Foxp3+ Treg cells to produce the suppressive cytokine interleukin 10 (IL-10). Instead, only CD4+ Foxp3− IL-4+ Th2 cells showed increased IL-10 production upon infection. These data indicate that Foxp3+ Treg cells do not play a prominent role in regulating immunity to S. mansoni larvae and that the character of the initial immune response invoked by S. mansoni parasites contrasts with the responses to other parasitic helminth infections that promote rapid Foxp3+ Treg cell responses.
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Yuan X, Li W, Cui Y, Zhan Q, Zhang C, Yang Z, Li X, Li S, Guan Q, Sun X. Specific cellular immune response elicited by the necrotic tumor cell-stimulated macrophages. Int Immunopharmacol 2015; 27:171-6. [PMID: 25981111 DOI: 10.1016/j.intimp.2015.04.056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 04/28/2015] [Accepted: 04/29/2015] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To determine whether the necrotic tumor cell-stimulated macrophages (NTCSM) could elicit specific immune response. METHODS Mice were immunized with the necrotic H22 tumor cell lysate-stimulated macrophages and the specific immune responses against the same tumor challenge were examined. The morphologic characteristics were observed with the transmission electron microscope and scanning electron microscopy. The expression of CD14, CD68, CD80 and CD86 were detected with the flow cytometer. The cytotoxicity and cytokine production of splenocytes were measured with the MTT assay and ELISA assay respectively. RESULTS Our research results reveal that NTCSMs are larger cells which generally generate spherical and elongated protrusions, folding membrane, and vesicles on their surface. Also, abundant lysosomes, secondary lysosomes, phagosomes, rough endoplasmic reticulum, and lipid bodies were found in their cytoplasm. The flow cytometry results show that the necrotic H22 tumor cell lysate could enhance the expression of CD14 and CD86 molecules and the NTCSM was characterized by the expression of CD14+/-CD68+CD80-CD86+. After the mice were vaccinated with NTCSMs, the tumor forming rate, tumor volume and weight of the NTCSM-vaccinated group were significantly lower than those of the sterile saline-injected group and untreated macrophage-vaccinated group (p<0.05). The cytotoxicity to H22 tumor cells of the splenocytes obtained from the NTCSM-immunized group was higher than that of the sterile saline-injected group and untreated macrophage-vaccinated group (p<0.05). Meanwhile, the levels of IL-2 and IFN-γ in the culture supernatant of the NTCSM-immunized group were higher significantly than those of the saline-injected group and untreated macrophage-vaccinated group. The level of IL-4 of the NTCSM-immunized group was significantly lower than those of the other two groups. CONCLUSION Our results indicated that NTCSMs could elicit specific cellular immune responses in vivo.
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Affiliation(s)
- Xiaolin Yuan
- Affiliated Hospital of Dalian University, Dalian 116001, PR China.
| | - Weina Li
- The Second Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine, Harbin 150001, PR China
| | - Yifen Cui
- Affiliated Hospital of Dalian University, Dalian 116001, PR China
| | - Qing Zhan
- Affiliated Hospital of Dalian University, Dalian 116001, PR China
| | - Chunlei Zhang
- Affiliated Hospital of Dalian University, Dalian 116001, PR China
| | - Zhen Yang
- Affiliated Hospital of Dalian University, Dalian 116001, PR China
| | - Xiaohuan Li
- Affiliated Hospital of Dalian University, Dalian 116001, PR China
| | - Shengfan Li
- Affiliated Hospital of Dalian University, Dalian 116001, PR China
| | - Qinglin Guan
- Affiliated Hospital of Dalian University, Dalian 116001, PR China
| | - Xiuyan Sun
- Affiliated Hospital of Dalian University, Dalian 116001, PR China
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Liu JY, Lu P, Hu LZ, Shen YJ, Zhu YJ, Ren JL, Ji WH, Zhang XZ, Wu ZQ, Yang XZ, Yang J, Li LY, Yang X, Liu PM. CD8α¯ DC is the major DC subset which mediates inhibition of allergic responses by Schistosoma infection. Parasite Immunol 2015; 36:647-57. [PMID: 25099746 DOI: 10.1111/pim.12134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 07/29/2014] [Indexed: 01/24/2023]
Abstract
Our and others' previous studies have shown that Schistosoma japonicum (SJ) infection can inhibit allergic reactions. We recently reported that DCs played an important role in SJ infection-mediated inhibition of allergy, which was associated with enhanced IL-10 and T regulatory cell responses. Here, we further compared the role of CD8α(+) DC and CD8α(-) DC subsets for the inhibitory effect. We sorted CD8α(+) DC (SJCD8α(+) DC) and CD8α(-) DC (SJCD8α(-) DC) from SJ-infected mice and tested their ability to modulate allergic responses in vivo. The data showed that the adoptive transfer of SJCD8α(-) DC was much more efficient than SJCD8α(+) DC for the suppression of allergic airway eosinophilia, mucus overproduction, antigen-specific IgE responses, and Th2 cytokines (IL-4 and IL-5). More importantly, we found that the transfer of SJCD8α(-) DC, but not SJCD8α(+) DC, significantly increased IL-10 and TGF-β production following OVA exposure. As control, the transfer of DC subsets from naïve mice had no significant effect on allergic inflammation. In addition, SJCD8α-DC expressed significantly higher IL-10 but lower IL-12, CD80 and CD86 than SJCD8α(+) DC, fitting a tolerogenic phenotype. The results suggest that CD8α(-) DC is the predominant DC subset which is involved in the parasitic infection-mediated inhibition of allergic inflammation and possibly through enhancing immunomodulatory cytokine (IL-10 and TGF-β) production.
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Affiliation(s)
- J-Y Liu
- Laboratory of Cellular and Molecular Immunology, Department of Parasitology, Faculty of Basic Medicine Sciences, Tianjin Medical University, Tianjin, China
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CD4+ T cell hyporesponsiveness after repeated exposure to Schistosoma mansoni larvae is dependent upon interleukin-10. Infect Immun 2015; 83:1418-30. [PMID: 25624353 PMCID: PMC4363412 DOI: 10.1128/iai.02831-14] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The effect that multiple percutaneous exposures to Schistosoma larvae has on the development of early CD4+ lymphocyte reactivity is unclear, yet it is important in the context of humans living in areas where schistosomiasis is endemic. In a murine model of multiple infections, we show that exposure of mice to repeated doses (4×) of Schistosoma mansoni cercariae, compared to a single dose (1×), results in CD4+ T cell hyporesponsiveness within the skin-draining lymph nodes (sdLN), manifested as reduced CD4+ cell proliferation and cytokine production. FoxP3+ CD4+ regulatory T cells were present in similar numbers in the sdLN of 4× and 1× mice and thus are unlikely to have a role in effecting hyporesponsiveness. Moreover, anergy of the CD4+ cell population from 4× mice was slight, as proliferation was only partly circumvented through the in vitro addition of exogenous interleukin-2 (IL-2), and the in vivo blockade of the regulatory molecule PD1 had a minimal effect on restoring responsiveness. In contrast, IL-10 was observed to be critical in mediating hyporesponsiveness, as CD4+ cells from the sdLN of 4× mice deficient for IL-10 were readily able to proliferate, unlike those from 4× wild-type cohorts. CD4+ cells from the sdLN of 4× mice exhibited higher levels of apoptosis and cell death, but in the absence of IL-10, there was significantly less cell death. Combined, our data show that IL-10 is a key factor in the development of CD4+ T cell hyporesponsiveness after repeated parasite exposure involving CD4+ cell apoptosis.
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Gaddipati S, Estrada K, Rao P, Jerome AD, Suvas S. IL-2/anti-IL-2 antibody complex treatment inhibits the development but not the progression of herpetic stromal keratitis. THE JOURNAL OF IMMUNOLOGY 2014; 194:273-82. [PMID: 25411200 DOI: 10.4049/jimmunol.1401285] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The IL-2/anti-IL-2 Ab immunocomplex has recently been shown to expand the naturally occurring pool of CD4(+)Foxp3(+) regulatory T cells (Tregs). In this study, we show that administration of the IL-2/anti-IL-2 Ab immunocomplex to C57BL/6 mice, prior to corneal HSV-1 infection, significantly increased the pool of Foxp3(+) Tregs when measured at early time points postinfection. Increased numbers of Foxp3(+) Tregs on days 2 and 4 postinfection resulted in a marked reduction in the development of severe herpetic stromal keratitis (HSK). When compared with corneas from the control group, corneas from the immunocomplex-treated group showed a significant reduction in the amount of infectious virus on day 2 but not on day 4 postinfection. Reduced viral load was associated with a 2-fold increase in NK cell numbers in corneas from the immunocomplex-treated group of mice. Moreover, a dramatic reduction in the influx of CD4 T cells in inflamed corneas was determined on days 7 and 16 postinfection in the immunocomplex-treated group of infected mice. Immunocomplex treatment given on days 5, 6, and 7 postinfection significantly increased Foxp3(+) Tregs in draining lymph nodes and in the spleen but failed to reduce the severity of HSK. In terms of the influx of CD4 T cells and granulocytes into inflamed corneas, no significant differences were noted between both groups of mice on day 16 postinfection. Our findings demonstrate that increasing Foxp3(+) Tregs early but not late postinfection in secondary lymphoid tissues is more efficacious in controlling the severity of HSK.
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Affiliation(s)
- Subhash Gaddipati
- Department of Biological Sciences, Oakland University, Rochester, MI 48309; Department of Ophthalmology, Wayne State University School of Medicine, Detroit, MI 48201; Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, MI 48201; and
| | - Kathleen Estrada
- Department of Biological Sciences, Oakland University, Rochester, MI 48309; Michigan State University College of Human Medicine, East Lansing, MI 48824
| | - Pushpa Rao
- Department of Biological Sciences, Oakland University, Rochester, MI 48309; Department of Ophthalmology, Wayne State University School of Medicine, Detroit, MI 48201; Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, MI 48201; and
| | - Andrew David Jerome
- Department of Biological Sciences, Oakland University, Rochester, MI 48309; Department of Ophthalmology, Wayne State University School of Medicine, Detroit, MI 48201; Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, MI 48201; and
| | - Susmit Suvas
- Department of Biological Sciences, Oakland University, Rochester, MI 48309; Department of Ophthalmology, Wayne State University School of Medicine, Detroit, MI 48201; Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, MI 48201; and
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Redpath SA, Fonseca NM, Perona-Wright G. Protection and pathology during parasite infection: IL-10 strikes the balance. Parasite Immunol 2014; 36:233-52. [PMID: 24666543 DOI: 10.1111/pim.12113] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 03/18/2014] [Indexed: 12/16/2022]
Abstract
The host response to infection requires an immune response to be strong enough to control the pathogen but also restrained, to minimize immune-mediated pathology. The conflicting pressures of immune activation and immune suppression are particularly apparent in parasite infections, where co-evolution of host and pathogen has selected many different compromises between protection and pathology. Cytokine signals are critical determinants of both protective immunity and immunopathology, and, in this review, we focus on the regulatory cytokine IL-10 and its role in protozoan and helminth infections. We discuss the sources and targets of IL-10 during parasite infection, the signals that initiate and reinforce its action, and its impact on the invading parasite, on the host tissue, and on coincident immune responses.
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Affiliation(s)
- S A Redpath
- Department of Microbiology & Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
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Santos PDA, Lorena VMB, Fernandes É, Sales IRF, Albuquerque MCP, Gomes Y, Costa VMA, Souza VMO. Maternal schistosomiasis alters costimulatory molecules expression in antigen-presenting cells from adult offspring mice. Exp Parasitol 2014; 141:62-7. [PMID: 24657585 DOI: 10.1016/j.exppara.2014.03.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 01/20/2014] [Accepted: 03/12/2014] [Indexed: 01/11/2023]
Abstract
Adult offspring of Schistosoma mansoni-infected mice showed alterations in immunity to a heterologous antigen, ovalbumin (OA). Prior breastfeeding induced increased production of anti-OA antibodies, while pregnancy impaired it. Here, we investigated the expression of costimulatory molecules on antigen-presenting cells (APCs) of the adult offspring of S. mansoni-infected mothers in response to OA. Newborn mice were divided into three groups: animals Born Infected Mothers (BIM) suckled by non-infected mothers; animals from non-infected mothers Suckled Infected Mothers (SIM); and another group of mice born from and suckled by non-infected mothers (CONTROL). The adult offspring were immunized with subcutaneous OA+adjuvant, and 3-8days following immunization, double labeling was performed (CD45R/B220 or CD11c and CD80, CD86, CD40 or HLA-DR) on spleen cells. In comparison to the CONTROL group, an early increased frequency of CD40+/CD80+ B cells was observed in SIM mice (p<0.001/p<0.05), but no alteration of CD11c+ cells was observed. In contrast, in BIM mice, the frequency of CD86+/CD11c+ cells (p<0.05) and CD40+/CD80+/CD86+ B cells (p<0.01/p<0.01/p<0.05) was drastically reduced. In conclusion, previous suckling by S. mansoni-infected mothers enabled improved antigen presentation by B cells in adult offspring, whereas gestation in these mothers imprinted offspring with weak antigen presentation by APCs during the immune response to a non-related antigen.
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Affiliation(s)
- Patrícia d'Emery Alves Santos
- Laboratory of Immunology, Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Recife, PE, Brazil
| | | | - Érica Fernandes
- Laboratory of Immunology, Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Recife, PE, Brazil
| | - Iana Rafaela Fernandes Sales
- Laboratory of Immunology, Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Recife, PE, Brazil
| | - Mônica Camelo Pessoa Albuquerque
- Laboratory of Immunology, Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Recife, PE, Brazil; Department of Tropical Medicine, Health Sciences Center, Federal University of Pernambuco, Recife, PE, Brazil
| | - Yara Gomes
- Aggeu Magalhães Research Center (CPqAM), Oswaldo Cruz Foundation (FIOCRUZ), Recife, PE, Brazil
| | - Vlaudia Maria Assis Costa
- Laboratory of Immunology, Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Recife, PE, Brazil; Department of Tropical Medicine, Health Sciences Center, Federal University of Pernambuco, Recife, PE, Brazil
| | - Valdênia Maria Oliveira Souza
- Laboratory of Immunology, Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Recife, PE, Brazil; Department of Pharmaceutical Sciences, Health Sciences Center, Federal University of Pernambuco, Recife, PE, Brazil.
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Kjetland EF, Hegertun IEA, Baay MFD, Onsrud M, Ndhlovu PD, Taylor M. Genital schistosomiasis and its unacknowledged role on HIV transmission in the STD intervention studies. Int J STD AIDS 2014; 25:705-15. [DOI: 10.1177/0956462414523743] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Treatment of sexually transmitted infections (STIs) has been hypothesised to decrease HIV transmission. Although observational studies show an association between STIs and HIV, only one prospective randomised controlled trial (RCT) has confirmed this. Female genital schistosomiasis can cause genital lesions, accompanied by bloody discharge, ulcers or malodorous discharge. Genital schistosomiasis is common, starts before puberty and symptoms can be mistaken for STIs. Three observational studies have found an association between schistosomiasis and HIV. Genital lesions that develop in childhood are chronic. This paper sought to explore the possible effects of schistosomiasis on the RCTs of STI treatment for HIV prevention. In the study sites, schistosomiasis was a likely cause of genital lesions. The studies recruited women that may have had genital schistosomal lesions established in childhood. Schistosomiasis endemic areas with different prevalence levels may have influenced HIV incidence in intervention and control sites differently, and some control group interventions may have influenced the impact of schistosomiasis on the study results. Schistosomiasis is a neglected cause of genital tract disease. It may have been an independent cause of HIV incidence in the RCTs of STI treatment for HIV prevention and may have obscured the findings of these trials.
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Affiliation(s)
- Eyrun F Kjetland
- Norwegian Centre for Imported and Tropical Diseases, Department of Infectious Diseases Ullevaal, Oslo University Hospital, Oslo, Norway
- Discipline of Public Health Medicine, Nelson R Mandela School of Medicine, School of Public Health, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Ingrid EA Hegertun
- Norwegian Centre for Imported and Tropical Diseases, Department of Infectious Diseases Ullevaal, Oslo University Hospital, Oslo, Norway
| | - Marc FD Baay
- Norwegian Centre for Imported and Tropical Diseases, Department of Infectious Diseases Ullevaal, Oslo University Hospital, Oslo, Norway
- Laboratory of Cancer Research and Clinical Oncology, University of Antwerp, Wilrijk, Belgium
| | - Mathias Onsrud
- Department of Gynaecology and Obstetrics, Oslo University Hospital, Oslo, Norway
| | | | - Myra Taylor
- Discipline of Public Health Medicine, Nelson R Mandela School of Medicine, School of Public Health, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
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Sawant DV, Gravano DM, Vogel P, Giacomin P, Artis D, Vignali DAA. Regulatory T cells limit induction of protective immunity and promote immune pathology following intestinal helminth infection. THE JOURNAL OF IMMUNOLOGY 2014; 192:2904-12. [PMID: 24532574 DOI: 10.4049/jimmunol.1202502] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Foxp3(+) regulatory T cells (Tregs) have a well-characterized role in limiting autoimmunity and dampening deleterious immune responses. However, a potential consequence of the immunosuppressive function of Tregs can be the limitation of protective immunity to infectious pathogens. Parasitic infections are a potent stimulus for the generation of Treg responses, which may be beneficial to both the parasite and the host by promoting persistence of infection and limiting immune-mediated pathology, respectively. In this study, we explore the functional role of Tregs post-low-dose infection with the intestinal helminth parasite Trichuris muris, which yields a chronic infection because of inefficient induction of Th2 responses. Early Treg depletion postinfection resulted in expedited worm clearance, and was associated with reduced Th1-mediated inflammation of the intestinal environment. Interestingly, this protective immunity was lost, and worm burden enhanced if Tregs were depleted later once the infection was established. Early and late Treg depletion resulted in enhanced Th2 and reduced Th1 cytokine and humoral responses. Blockade of the Th2 cytokine IL-4 resulted in a moderate increase in Th1 but had no effect on worm burden. Our findings suggest that Tregs preferentially limit Th2 cell expansion, which can impact infections where clear immune polarity has not been established. Thus, the impact of Treg depletion is context and time dependent, and can be beneficial to the host in situations where Th1 responses should be limited in favor of Th2 responses.
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Affiliation(s)
- Deepali V Sawant
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105
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Blankenhaus B, Reitz M, Brenz Y, Eschbach ML, Hartmann W, Haben I, Sparwasser T, Huehn J, Kühl A, Feyerabend TB, Rodewald HR, Breloer M. Foxp3⁺ regulatory T cells delay expulsion of intestinal nematodes by suppression of IL-9-driven mast cell activation in BALB/c but not in C57BL/6 mice. PLoS Pathog 2014; 10:e1003913. [PMID: 24516385 PMCID: PMC3916398 DOI: 10.1371/journal.ppat.1003913] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 12/19/2013] [Indexed: 12/11/2022] Open
Abstract
Accumulating evidence suggests that IL-9-mediated immunity plays a fundamental role in control of intestinal nematode infection. Here we report a different impact of Foxp3⁺ regulatory T cells (Treg) in nematode-induced evasion of IL-9-mediated immunity in BALB/c and C57BL/6 mice. Infection with Strongyloides ratti induced Treg expansion with similar kinetics and phenotype in both strains. Strikingly, Treg depletion reduced parasite burden selectively in BALB/c but not in C57BL/6 mice. Treg function was apparent in both strains as Treg depletion increased nematode-specific humoral and cellular Th2 response in BALB/c and C57BL/6 mice to the same extent. Improved resistance in Treg-depleted BALB/c mice was accompanied by increased production of IL-9 and accelerated degranulation of mast cells. In contrast, IL-9 production was not significantly elevated and kinetics of mast cell degranulation were unaffected by Treg depletion in C57BL/6 mice. By in vivo neutralization, we demonstrate that increased IL-9 production during the first days of infection caused accelerated mast cell degranulation and rapid expulsion of S. ratti adults from the small intestine of Treg-depleted BALB/c mice. In genetically mast cell-deficient (Cpa3-Cre) BALB/c mice, Treg depletion still resulted in increased IL-9 production but resistance to S. ratti infection was lost, suggesting that IL-9-driven mast cell activation mediated accelerated expulsion of S. ratti in Treg-depleted BALB/c mice. This IL-9-driven mast cell degranulation is a central mechanism of S. ratti expulsion in both, BALB/c and C57BL/6 mice, because IL-9 injection reduced and IL-9 neutralization increased parasite burden in the presence of Treg in both strains. Therefore our results suggest that Foxp3⁺ Treg suppress sufficient IL-9 production for subsequent mast cell degranulation during S. ratti infection in a non-redundant manner in BALB/c mice, whereas additional regulatory pathways are functional in Treg-depleted C57BL/6 mice.
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Affiliation(s)
| | - Martina Reitz
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Yannick Brenz
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | | | - Wiebke Hartmann
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Irma Haben
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Tim Sparwasser
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research; a joint venture between the Helmholtz Centre for Infection Research Braunschweig and the Hanover Medical School, Hanover, Germany
| | - Jochen Huehn
- Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Anja Kühl
- Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, Charité-Campus Benjamin Franklin, Berlin, Germany
| | | | - Hans-Reimer Rodewald
- Division for Cellular Immunology, Deutsches Krebsforschungszentrum, Heidelberg, Germany
| | - Minka Breloer
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
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50
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Chuah C, Jones MK, Burke ML, McManus DP, Gobert GN. Cellular and chemokine-mediated regulation in schistosome-induced hepatic pathology. Trends Parasitol 2014; 30:141-50. [PMID: 24433721 DOI: 10.1016/j.pt.2013.12.009] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 12/17/2013] [Accepted: 12/18/2013] [Indexed: 02/06/2023]
Abstract
In hepatic schistosomiasis, pathology arises when schistosome eggs become lodged in the host liver, evoking an interleukin 4 (IL-4)- and IL-13-mediated dominant CD4(+) Th2 immune response. This response leads to the development of granulomas and fibrosis, with eosinophils, neutrophils, macrophages, hepatic stellate cells, and lymphocytes all identified as major cellular contributors to these events. This review outlines the cellular and molecular mechanisms of hepatic schistosomiasis, with an emphasis on the major cellular components and their release of chemokines. The differences between Schistosoma mansoni- and Schistosoma japonicum-induced hepatic granuloma are also discussed. This comprehensive overview of the processes associated with hepatic schistosomiasis may provide new insights into improved treatment for both schistosomiasis and other granulofibrotic diseases.
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Affiliation(s)
- Candy Chuah
- Parasite Cell Biology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, 4006, Australia; School of Veterinary Sciences, The University of Queensland, Gatton, 4343, Australia; School of Medical Sciences, Universiti Sains Malaysia, 16150, Kelantan, Malaysia
| | - Malcolm K Jones
- Parasite Cell Biology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, 4006, Australia; School of Veterinary Sciences, The University of Queensland, Gatton, 4343, Australia
| | - Melissa L Burke
- Division of Mycobacterial Research, National Institute for Medical Research, London, NW7 1AA, UK
| | - Donald P McManus
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, 4006, Australia
| | - Geoffrey N Gobert
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, 4006, Australia.
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