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Pillay R, Mkhize-Kwitshana ZL, Horsnell WGC, Icke C, Henderson I, Selkirk ME, Berkachy R, Naidoo P, Niehaus AJ, Singh R, Cunningham AF, O'Shea MK. Excretory-secretory products from adult helminth Nippostrongylus brasiliensis have in vitro bactericidal activity. J Med Microbiol 2023; 72. [PMID: 37929930 DOI: 10.1099/jmm.0.001762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023] Open
Abstract
Introduction. Intestinal helminths and microbiota share the same anatomical niche during infection and are likely to interact either directly or indirectly. Whether intestinal helminths employ bactericidal strategies that influence their microbial environment is not completely understood.Hypothesis. In the present study, the hypothesis that the adult hookworm Nippostrongylus brasiliensis produces molecules that impair bacterial growth in vitro, is tested.Aim. To investigate the in vitro bactericidal activity of Nippostrongylus brasiliensis against commensal and pathogenic bacteria.Methodology. The bactericidal effect of somatic extract and excretory-secretory products of adult Nippostrongylus brasiliensis on Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli, Salmonella enterica serovar Typhimurium, and Klebsiella pneumoniae) bacteria was assessed using growth assays. Minimum inhibitory concentration and minimum bactericidal concentration assays were performed using excretory-secretory products released from the pathogen.Results. Broad-spectrum in vitro bactericidal activity in excretory-secretory products, but not somatic extract of adult Nippostrongylus brasiliensis was detected. The bactericidal activity of excretory-secretory products was concentration-dependent, maintained after heat treatment, and preserved after repeated freezing and thawing.Conclusion. The results of this study demonstrate that helminths such as Nippostrongylus brasiliensis release molecules via their excretory-secretory pathway that have broad-spectrum bactericidal activity. The mechanisms responsible for this bactericidal activity remain to be determined and further studies aimed at isolating and identifying active bactericidal molecules are needed.
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Affiliation(s)
- Roxanne Pillay
- Department of Biomedical Sciences, Faculty of Natural Sciences, Mangosuthu University of Technology, Umlazi, South Africa
- Department of Medical Microbiology, College of Health Sciences, School of Laboratory Medicine & Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
- Division of Research Capacity Development, South African Medical Research Council (SAMRC), Tygerberg, Cape Town, South Africa
| | - Zilungile L Mkhize-Kwitshana
- Department of Medical Microbiology, College of Health Sciences, School of Laboratory Medicine & Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
- Division of Research Capacity Development, South African Medical Research Council (SAMRC), Tygerberg, Cape Town, South Africa
| | - William G C Horsnell
- Institute of Infectious Disease and Molecular Medicine (IDM), Department of Pathology, Division of Immunology, Faculty of Health Science, University of Cape Town, Cape Town, South Africa
- Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, UK
| | - Christopher Icke
- Institute of Microbiology and Infection, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Ian Henderson
- Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD4072, Australia
| | - Murray E Selkirk
- Department of Life Sciences, Imperial College London, London, UK
| | - Rita Berkachy
- Department of Life Sciences, Imperial College London, London, UK
| | - Pragalathan Naidoo
- Department of Medical Microbiology, College of Health Sciences, School of Laboratory Medicine & Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
- Division of Research Capacity Development, South African Medical Research Council (SAMRC), Tygerberg, Cape Town, South Africa
| | - Abraham J Niehaus
- Department of Microbiology, Ampath Laboratories, Cape Town, South Africa
| | - Ravesh Singh
- Department of Medical Microbiology, College of Health Sciences, School of Laboratory Medicine & Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Adam F Cunningham
- Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Matthew K O'Shea
- Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
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Roberts LB, Berkachy R, Wane M, Patel DF, Schnoeller C, Lord GM, Gounaris K, Ryffel B, Quesniaux V, Darby M, Horsnell WGC, Selkirk ME. Differential Regulation of Allergic Airway Inflammation by Acetylcholine. Front Immunol 2022; 13:893844. [PMID: 35711456 PMCID: PMC9196131 DOI: 10.3389/fimmu.2022.893844] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 05/03/2022] [Indexed: 01/14/2023] Open
Abstract
Acetylcholine (ACh) from neuronal and non-neuronal sources plays an important role in the regulation of immune responses and is associated with the development of several disease pathologies. We have previously demonstrated that group 2 innate lymphoid cell (ILC2)-derived ACh is required for optimal type 2 responses to parasitic infection and therefore sought to determine whether this also plays a role in allergic inflammation. RoraCre+ChatLoxP mice (in which ILC2s cannot synthesize ACh) were exposed to an allergenic extract of the fungus Alternaria alternata, and immune responses in the airways and lung tissues were analyzed. Airway neutrophilia and expression of the neutrophil chemoattractants CXCL1 and CXCL2 were enhanced 24 h after exposure, suggesting that ILC2-derived ACh plays a role in limiting excessive pulmonary neutrophilic inflammation. The effect of non-selective depletion of ACh was examined by intranasal administration of a stable parasite-secreted acetylcholinesterase. Depletion of airway ACh in this manner resulted in a more profound enhancement of neutrophilia and chemokine expression, suggesting multiple cellular sources for the release of ACh. In contrast, depletion of ACh inhibited Alternaria-induced activation of ILC2s, suppressing the expression of IL-5, IL-13, and subsequent eosinophilia. Depletion of ACh reduced macrophages with an alternatively activated M2 phenotype and an increase in M1 macrophage marker expression. These data suggest that ACh regulates allergic airway inflammation in several ways, enhancing ILC2-driven eosinophilia but suppressing neutrophilia through reduced chemokine expression.
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Affiliation(s)
- Luke B. Roberts
- Department of Life Sciences, Imperial College London, London, United Kingdom,School of Immunology and Microbial Sciences, King’s College London, Great Maze Pond, London, United Kingdom,*Correspondence: Luke B. Roberts, ; Murray E. Selkirk,
| | - Rita Berkachy
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Madina Wane
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Dhiren F. Patel
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Corinna Schnoeller
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Graham M. Lord
- School of Immunology and Microbial Sciences, King’s College London, Great Maze Pond, London, United Kingdom,Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
| | - Kleoniki Gounaris
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Bernhard Ryffel
- Laboratory of Molecular and Experimental Immunology and Neurogenetics, UMR 7355, CNRS-University of Orleans and Le Studium Institute for Advanced Studies, Rue Dupanloup, Orléans, France
| | - Valerie Quesniaux
- Laboratory of Molecular and Experimental Immunology and Neurogenetics, UMR 7355, CNRS-University of Orleans and Le Studium Institute for Advanced Studies, Rue Dupanloup, Orléans, France
| | - Matthew Darby
- Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - William G. C. Horsnell
- Laboratory of Molecular and Experimental Immunology and Neurogenetics, UMR 7355, CNRS-University of Orleans and Le Studium Institute for Advanced Studies, Rue Dupanloup, Orléans, France,Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa,College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Murray E. Selkirk
- Department of Life Sciences, Imperial College London, London, United Kingdom,*Correspondence: Luke B. Roberts, ; Murray E. Selkirk,
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Roberts LB, Jowett GM, Read E, Zabinski T, Berkachy R, Selkirk ME, Jackson I, Niazi U, Anandagoda N, Araki M, Araki K, Kasturiarachchi J, James C, Enver T, Nimmo R, Reis R, Howard JK, Neves JF, Lord GM. MicroRNA-142 Critically Regulates Group 2 Innate Lymphoid Cell Homeostasis and Function. J Immunol 2021; 206:2725-2739. [PMID: 34021046 PMCID: PMC7610861 DOI: 10.4049/jimmunol.2000647] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 03/19/2021] [Indexed: 02/06/2023]
Abstract
MicroRNA-142 isoforms critically regulate ILC2 homeostasis and effector functions. MicroRNA-142 isoforms regulate the ILC2 lineage cell intrinsically. Socs1 and Gfi1 are miR-142 isoform regulated targets in ILC2s.
Innate lymphoid cells are central to the regulation of immunity at mucosal barrier sites, with group 2 innate lymphoid cells (ILC2s) being particularly important in type 2 immunity. In this study, we demonstrate that microRNA(miR)-142 plays a critical, cell-intrinsic role in the homeostasis and function of ILC2s. Mice deficient for miR-142 expression demonstrate an ILC2 progenitor–biased development in the bone marrow, and along with peripheral ILC2s at mucosal sites, these cells display a greatly altered phenotype based on surface marker expression. ILC2 proliferative and effector functions are severely dysfunctional following Nippostrongylus brasiliensis infection, revealing a critical role for miR-142 isoforms in ILC2-mediated immune responses. Mechanistically, Socs1 and Gfi1 expression are regulated by miR-142 isoforms in ILC2s, impacting ILC2 phenotypes as well as the proliferative and effector capacity of these cells. The identification of these novel pathways opens potential new avenues to modulate ILC2-dependent immune functions.
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Affiliation(s)
- Luke B Roberts
- School of Immunology and Microbial Sciences, King's College London, London, United Kingdom
| | - Geraldine M Jowett
- Centre for Host-Microbiome Interactions, King's College London, London, United Kingdom.,Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom.,Wellcome Trust Cell Therapies and Regenerative Medicine PhD program, London, United Kingdom
| | - Emily Read
- Centre for Host-Microbiome Interactions, King's College London, London, United Kingdom.,Wellcome Trust Cell Therapies and Regenerative Medicine PhD program, London, United Kingdom
| | - Tomas Zabinski
- School of Immunology and Microbial Sciences, King's College London, London, United Kingdom
| | - Rita Berkachy
- Department of Life Sciences, Imperial College London, United Kingdom
| | - Murray E Selkirk
- Department of Life Sciences, Imperial College London, United Kingdom
| | - Ian Jackson
- School of Immunology and Microbial Sciences, King's College London, London, United Kingdom
| | - Umar Niazi
- Guy's and St Thomas' National Health Service Foundation Trust and King's College London National Institute for Health Research Biomedical Research Centre Translational Bioinformatics Platform, Guy's Hospital, London, United Kingdom
| | - Nelomi Anandagoda
- School of Immunology and Microbial Sciences, King's College London, London, United Kingdom
| | - Masatake Araki
- Institute of Resource Development and Analysis, Kumamoto University, Kumamoto, Japan
| | - Kimi Araki
- Institute of Resource Development and Analysis, Kumamoto University, Kumamoto, Japan
| | - Jagath Kasturiarachchi
- University College London Cancer Institute, University College London, London, United Kingdom
| | - Chela James
- University College London Cancer Institute, University College London, London, United Kingdom
| | - Tariq Enver
- University College London Cancer Institute, University College London, London, United Kingdom
| | - Rachael Nimmo
- University College London Cancer Institute, University College London, London, United Kingdom
| | - Rita Reis
- School of Immunology and Microbial Sciences, King's College London, London, United Kingdom
| | - Jane K Howard
- School of Life Course Sciences, King's College London, London, United Kingdom; and
| | - Joana F Neves
- Centre for Host-Microbiome Interactions, King's College London, London, United Kingdom
| | - Graham M Lord
- School of Immunology and Microbial Sciences, King's College London, London, United Kingdom; .,Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
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Roberts LB, Schnoeller C, Berkachy R, Darby M, Pillaye J, Oudhoff MJ, Parmar N, Mackowiak C, Sedda D, Quesniaux V, Ryffel B, Vaux R, Gounaris K, Berrard S, Withers DR, Horsnell WGC, Selkirk ME. Acetylcholine production by group 2 innate lymphoid cells promotes mucosal immunity to helminths. Sci Immunol 2021; 6:6/57/eabd0359. [PMID: 33674321 DOI: 10.1126/sciimmunol.abd0359] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 12/11/2020] [Indexed: 12/13/2022]
Abstract
Innate lymphoid cells (ILCs) are critical mediators of immunological and physiological responses at mucosal barrier sites. Whereas neurotransmitters can stimulate ILCs, the synthesis of small-molecule neurotransmitters by these cells has only recently been appreciated. Group 2 ILCs (ILC2s) are shown here to synthesize and release acetylcholine (ACh) during parasitic nematode infection. The cholinergic phenotype of pulmonary ILC2s was associated with their activation state, could be induced by in vivo exposure to extracts of Alternaria alternata or the alarmin cytokines interleukin-33 (IL-33) and IL-25, and was augmented by IL-2 in vitro. Genetic disruption of ACh synthesis by murine ILC2s resulted in increased parasite burdens, lower numbers of ILC2s, and reduced lung and gut barrier responses to Nippostrongylus brasiliensis infection. These data demonstrate a functional role for ILC2-derived ACh in the expansion of ILC2s for maximal induction of type 2 immunity.
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Affiliation(s)
- Luke B Roberts
- Department of Life Sciences, Imperial College London, London, UK. .,School of Immunology and Microbial Sciences, King's College London, Great Maze Pond, London SE1 9RT, UK
| | | | - Rita Berkachy
- Department of Life Sciences, Imperial College London, London, UK
| | - Matthew Darby
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Jamie Pillaye
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Menno J Oudhoff
- Centre of Molecular Inflammation Research (CEMIR), Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Naveen Parmar
- Centre of Molecular Inflammation Research (CEMIR), Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Claire Mackowiak
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Delphine Sedda
- Laboratory of Molecular and Experimental Immunology and Neurogenetics, UMR 7355, CNRS-University of Orleans and Le Studium Institute for Advanced Studies, Rue Dupanloup, 45000 Orléans, France
| | - Valerie Quesniaux
- Laboratory of Molecular and Experimental Immunology and Neurogenetics, UMR 7355, CNRS-University of Orleans and Le Studium Institute for Advanced Studies, Rue Dupanloup, 45000 Orléans, France
| | - Bernhard Ryffel
- Laboratory of Molecular and Experimental Immunology and Neurogenetics, UMR 7355, CNRS-University of Orleans and Le Studium Institute for Advanced Studies, Rue Dupanloup, 45000 Orléans, France
| | - Rachel Vaux
- Department of Life Sciences, Imperial College London, London, UK
| | | | - Sylvie Berrard
- Université de Paris, NeuroDiderot, Inserm, 75019 Paris, France
| | - David R Withers
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - William G C Horsnell
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa. .,College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.,Laboratory of Molecular and Experimental Immunology and Neurogenetics, UMR 7355, CNRS-University of Orleans and Le Studium Institute for Advanced Studies, Rue Dupanloup, 45000 Orléans, France
| | - Murray E Selkirk
- Department of Life Sciences, Imperial College London, London, UK.
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Vaux R, Schnoeller C, Berkachy R, Roberts LB, Hagen J, Gounaris K, Selkirk ME. Modulation of the Immune Response by Nematode Secreted Acetylcholinesterase Revealed by Heterologous Expression in Trypanosoma musculi. PLoS Pathog 2016; 12:e1005998. [PMID: 27802350 PMCID: PMC5089771 DOI: 10.1371/journal.ppat.1005998] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 10/13/2016] [Indexed: 12/19/2022] Open
Abstract
Nematode parasites secrete molecules which regulate the mammalian immune system, but their genetic intractability is a major impediment to identifying and characterising the biological effects of these molecules. We describe here a novel system for heterologous expression of helminth secreted proteins in the natural parasite of mice, Trypanosoma musculi, which can be used to analyse putative immunomodulatory functions. Trypanosomes were engineered to express a secreted acetylcholinesterase from Nippostrongylus brasiliensis. Infection of mice with transgenic parasites expressing acetylcholinesterase resulted in truncated infection, with trypanosomes cleared early from the circulation. Analysis of cellular phenotypes indicated that exposure to acetylcholinesterase in vivo promoted classical activation of macrophages (M1), with elevated production of nitric oxide and lowered arginase activity. This most likely occurred due to the altered cytokine environment, as splenocytes from mice infected with T. musculi expressing acetylcholinesterase showed enhanced production of IFNγ and TNFα, with diminished IL-4, IL-13 and IL-5. These results suggest that one of the functions of nematode secreted acetylcholinesterase may be to alter the cytokine environment in order to inhibit development of M2 macrophages which are deleterious to parasite survival. Transgenic T. musculi represents a valuable new vehicle to screen for novel immunoregulatory proteins by extracellular delivery in vivo to the murine host.
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Affiliation(s)
- Rachel Vaux
- Department of Life Sciences, Imperial College London
| | | | - Rita Berkachy
- Department of Life Sciences, Imperial College London
| | | | - Jana Hagen
- Department of Life Sciences, Imperial College London
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