1
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Creamer A, Fiego AL, Agliano A, Prados-Martin L, Høgset H, Najer A, Richards DA, Wojciechowski JP, Foote JEJ, Kim N, Monahan A, Tang J, Shamsabadi A, Rochet LNC, Thanasi IA, de la Ballina LR, Rapley CL, Turnock S, Love EA, Bugeon L, Dallman MJ, Heeney M, Kramer-Marek G, Chudasama V, Fenaroli F, Stevens MM. Modular Synthesis of Semiconducting Graft Copolymers to Achieve "Clickable" Fluorescent Nanoparticles with Long Circulation and Specific Cancer Targeting. Adv Mater 2023:e2300413. [PMID: 36905683 DOI: 10.1002/adma.202300413] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Semiconducting polymer nanoparticles (SPNs) are explored for applications in cancer theranostics because of their high absorption coefficients, photostability, and biocompatibility. However, SPNs are susceptible to aggregation and protein fouling in physiological conditions, which can be detrimental for in vivo applications. Here, a method for achieving colloidally stable and low-fouling SPNs is described by grafting poly(ethylene glycol) (PEG) onto the backbone of the fluorescent semiconducting polymer, poly(9,9'-dioctylfluorene-5-fluoro-2,1,3-benzothiadiazole), in a simple one-step substitution reaction, postpolymerization. Further, by utilizing azide-functionalized PEG, anti-human epidermal growth factor receptor 2 (HER2) antibodies, antibody fragments, or affibodies are site-specifically "clicked" onto the SPN surface, which allows the functionalized SPNs to specifically target HER2-positive cancer cells. In vivo, the PEGylated SPNs are found to have excellent circulation efficiencies in zebrafish embryos for up to seven days postinjection. SPNs functionalized with affibodies are then shown to be able to target HER2 expressing cancer cells in a zebrafish xenograft model. The covalent PEGylated SPN system described herein shows great potential for cancer theranostics.
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Affiliation(s)
- Adam Creamer
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Alessandra Lo Fiego
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Alice Agliano
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Lino Prados-Martin
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Håkon Høgset
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Adrian Najer
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Daniel A Richards
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Jonathan P Wojciechowski
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - James E J Foote
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Nayoung Kim
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Amy Monahan
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Jiaqing Tang
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - André Shamsabadi
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Léa N C Rochet
- UCL Department of Chemistry, University College London, London, WC1H 0AJ, UK
| | - Ioanna A Thanasi
- UCL Department of Chemistry, University College London, London, WC1H 0AJ, UK
| | - Laura R de la Ballina
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Oslo, 0372, Norway
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0450, Norway
| | | | - Stephen Turnock
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, Sutton, SM2 5NG, UK
| | - Elizabeth A Love
- LifeArc, Accelerator Building, Open Innovation Campus, Stevenage, SG1 2FX, UK
| | - Laurence Bugeon
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Margaret J Dallman
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Martin Heeney
- Department of Chemistry, Imperial College London, London, W12 0BZ, UK
| | - Gabriela Kramer-Marek
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, Sutton, SM2 5NG, UK
| | - Vijay Chudasama
- UCL Department of Chemistry, University College London, London, WC1H 0AJ, UK
| | - Federico Fenaroli
- Department of Chemistry, Bioscience and Environmental Engineering, University of Stavanger, Stavanger, 4021, Norway
- Department of Biosciences, University of Oslo, Blindernveien 31, Oslo, 0371, Norway
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
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2
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Najer A, Blight J, Ducker CB, Gasbarri M, Brown JC, Che J, Høgset H, Saunders C, Ojansivu M, Lu Z, Lin Y, Yeow J, Rifaie-Graham O, Potter M, Tonkin R, Penders J, Doutch JJ, Georgiadou A, Barriga HMG, Holme MN, Cunnington AJ, Bugeon L, Dallman MJ, Barclay WS, Stellacci F, Baum J, Stevens MM. Potent Virustatic Polymer-Lipid Nanomimics Block Viral Entry and Inhibit Malaria Parasites In Vivo. ACS Cent Sci 2022; 8:1238-1257. [PMID: 36188342 PMCID: PMC9092191 DOI: 10.1021/acscentsci.1c01368] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Infectious diseases continue to pose a substantial burden on global populations, requiring innovative broad-spectrum prophylactic and treatment alternatives. Here, we have designed modular synthetic polymer nanoparticles that mimic functional components of host cell membranes, yielding multivalent nanomimics that act by directly binding to varied pathogens. Nanomimic blood circulation time was prolonged by reformulating polymer-lipid hybrids. Femtomolar concentrations of the polymer nanomimics were sufficient to inhibit herpes simplex virus type 2 (HSV-2) entry into epithelial cells, while higher doses were needed against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Given their observed virustatic mode of action, the nanomimics were also tested with malaria parasite blood-stage merozoites, which lose their invasive capacity after a few minutes. Efficient inhibition of merozoite invasion of red blood cells was demonstrated both in vitro and in vivo using a preclinical rodent malaria model. We envision these nanomimics forming an adaptable platform for developing pathogen entry inhibitors and as immunomodulators, wherein nanomimic-inhibited pathogens can be secondarily targeted to sites of immune recognition.
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Affiliation(s)
- Adrian Najer
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
- Department
of Life Sciences, Imperial College London, London, SW7 2AZ, U.K.
| | - Joshua Blight
- Department
of Life Sciences, Imperial College London, London, SW7 2AZ, U.K.
| | | | - Matteo Gasbarri
- Institute
of Materials, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Jonathan C. Brown
- Department
of Infectious Disease, Imperial College
London, London, W2 1PG, U.K.
| | - Junyi Che
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Håkon Høgset
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Catherine Saunders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Miina Ojansivu
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Zixuan Lu
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Yiyang Lin
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Jonathan Yeow
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Omar Rifaie-Graham
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Michael Potter
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Renée Tonkin
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - Jelle Penders
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
| | - James J. Doutch
- Rutherford
Appleton Laboratory, ISIS Neutron and Muon
Source, STFC, Didcot OX11 ODE, U.K.
| | - Athina Georgiadou
- Department
of Infectious Disease, Imperial College
London, London, W2 1PG, U.K.
| | - Hanna M. G. Barriga
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Margaret N. Holme
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | | | - Laurence Bugeon
- Department
of Life Sciences, Imperial College London, London, SW7 2AZ, U.K.
| | | | - Wendy S. Barclay
- Department
of Infectious Disease, Imperial College
London, London, W2 1PG, U.K.
| | - Francesco Stellacci
- Institute
of Materials, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Institute
of Bioengineering, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Jake Baum
- Department
of Life Sciences, Imperial College London, London, SW7 2AZ, U.K.
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London, SW7 2AZ, U.K.
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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3
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Høgset H, Horgan CC, Armstrong JPK, Bergholt MS, Torraca V, Chen Q, Keane TJ, Bugeon L, Dallman MJ, Mostowy S, Stevens MM. In vivo biomolecular imaging of zebrafish embryos using confocal Raman spectroscopy. Nat Commun 2020; 11:6172. [PMID: 33268772 PMCID: PMC7710741 DOI: 10.1038/s41467-020-19827-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 10/28/2020] [Indexed: 12/18/2022] Open
Abstract
Zebrafish embryos provide a unique opportunity to visualize complex biological processes, yet conventional imaging modalities are unable to access intricate biomolecular information without compromising the integrity of the embryos. Here, we report the use of confocal Raman spectroscopic imaging for the visualization and multivariate analysis of biomolecular information extracted from unlabeled zebrafish embryos. We outline broad applications of this method in: (i) visualizing the biomolecular distribution of whole embryos in three dimensions, (ii) resolving anatomical features at subcellular spatial resolution, (iii) biomolecular profiling and discrimination of wild type and ΔRD1 mutant Mycobacterium marinum strains in a zebrafish embryo model of tuberculosis and (iv) in vivo temporal monitoring of the wound response in living zebrafish embryos. Overall, this study demonstrates the application of confocal Raman spectroscopic imaging for the comparative bimolecular analysis of fully intact and living zebrafish embryos.
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Affiliation(s)
- Håkon Høgset
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Conor C Horgan
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - James P K Armstrong
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Mads S Bergholt
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
- Department of Craniofacial Development & Stem Cell Biology, Kings College London, Tower Wing, Guy's Hospital, London, SE1 9RT, UK
| | - Vincenzo Torraca
- Department of Infection Biology, London School of Hygiene & Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Qu Chen
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Timothy J Keane
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Laurence Bugeon
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Margaret J Dallman
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Serge Mostowy
- Department of Infection Biology, London School of Hygiene & Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK.
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4
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Wenz R, Conibear E, Bugeon L, Dallman M. Fast, easy and early (larval) identification of transparent mutant zebrafish using standard fluorescence microscopy. F1000Res 2020; 9:963. [PMID: 32934809 PMCID: PMC7475958 DOI: 10.12688/f1000research.22464.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/09/2020] [Indexed: 11/20/2022] Open
Abstract
The availability of transparent zebrafish mutants (either TraNac: tra b6/b6; nac w2/w2 or casper: roy a9/a9; nac w2/w2 ) for live imaging studies together with the ease of generating transgenic lines are two of the strengths of the zebrafish model organism. The fact that transparent casper ( roy a9/a9;nac w2/w2) and silver nacre ( nac w2/w2) mutants are indistinguishable by eye at early stages (1-5 days post-fertilization; dpf) means many fish must be raised and later culled if they are not transparent. To identify translucent mutants early and easily at the early larval stage (≤5 dpf) before they are classified as protected animals, we developed a simple screening method using standard fluorescence microscopy. We estimate that this procedure could annually save 60,000 animals worldwide.
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Affiliation(s)
- Ralf Wenz
- Life Sciences, Imperial College London, London, Greater London, SW7 2AZ, UK
| | - Emily Conibear
- Life Sciences, Imperial College London, London, Greater London, SW7 2AZ, UK
| | - Laurence Bugeon
- Life Sciences, Imperial College London, London, Greater London, SW7 2AZ, UK
| | - Maggie Dallman
- Life Sciences, Imperial College London, London, Greater London, SW7 2AZ, UK
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5
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Bottiglione F, Dee CT, Lea R, Zeef LAH, Badrock AP, Wane M, Bugeon L, Dallman MJ, Allen JE, Hurlstone AFL. Zebrafish IL-4-like Cytokines and IL-10 Suppress Inflammation but Only IL-10 Is Essential for Gill Homeostasis. J Immunol 2020; 205:994-1008. [PMID: 32641385 PMCID: PMC7416321 DOI: 10.4049/jimmunol.2000372] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 06/09/2020] [Indexed: 12/20/2022]
Abstract
Mucosal surfaces such as fish gills interface between the organism and the external environment and as such are major sites of foreign Ag encounter. In the gills, the balance between inflammatory responses to waterborne pathogens and regulatory responses toward commensal microbes is critical for effective barrier function and overall fish health. In mammals, IL-4 and IL-13 in concert with IL-10 are essential for balancing immune responses to pathogens and suppressing inflammation. Although considerable progress has been made in the field of fish immunology in recent years, whether the fish counterparts of these key mammalian cytokines perform similar roles is still an open question. In this study, we have generated IL-4/13A and IL-4/13B mutant zebrafish (Danio rerio) and, together with an existing IL-10 mutant line, characterized the consequences of loss of function of these cytokines. We demonstrate that IL-4/13A and IL-4/13B are required for the maintenance of a Th2-like phenotype in the gills and the suppression of type 1 immune responses. As in mammals, IL-10 appears to have a more striking anti-inflammatory function than IL-4-like cytokines and is essential for gill homeostasis. Thus, both IL-4/13 and IL-10 paralogs in zebrafish exhibit aspects of conserved function with their mammalian counterparts.
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Affiliation(s)
- Federica Bottiglione
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, United Kingdom; and
| | - Christopher T Dee
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, United Kingdom; and
| | - Robert Lea
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, United Kingdom; and
| | - Leo A H Zeef
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, United Kingdom; and
| | - Andrew P Badrock
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, United Kingdom; and
| | - Madina Wane
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Laurence Bugeon
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Margaret J Dallman
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Judith E Allen
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, United Kingdom; and
| | - Adam F L Hurlstone
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, United Kingdom; and
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6
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Moroz-Omori E, Satyapertiwi D, Ramel MC, Høgset H, Sunyovszki IK, Liu Z, Wojciechowski JP, Zhang Y, Grigsby CL, Brito L, Bugeon L, Dallman MJ, Stevens MM. Photoswitchable gRNAs for Spatiotemporally Controlled CRISPR-Cas-Based Genomic Regulation. ACS Cent Sci 2020; 6:695-703. [PMID: 32490186 PMCID: PMC7256956 DOI: 10.1021/acscentsci.9b01093] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Indexed: 05/06/2023]
Abstract
The recently discovered CRISPR-Cas gene editing system and its derivatives have found numerous applications in fundamental biology research and pharmaceutical sciences. The need for precise external control over the gene editing and regulatory events has driven the development of inducible CRISPR-Cas systems. While most of the light-controllable CRISPR-Cas systems are based on protein engineering, we developed an alternative synthetic approach based on modification of crRNA/tracrRNA duplex (guide RNA or gRNA) with photocaging groups, preventing the gRNA from recognizing its genome target sequence until its deprotection is induced within seconds of illumination. This approach relies on a straightforward solid-phase synthesis of the photocaged gRNAs, with simpler purification and characterization processes in comparison to engineering a light-responsive protein. We have demonstrated the feasibility of photocaging of gRNAs and light-mediated DNA cleavage upon brief exposure to light in vitro. We have achieved light-mediated spatiotemporally resolved gene editing as well as gene activation in cells, whereas photocaged gRNAs showed virtually no detectable gene editing or activation in the absence of light irradiation. Finally, we have applied this system to spatiotemporally control gene editing in zebrafish embryos in vivo, enabling the use of this strategy for developmental biology and tissue engineering applications.
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Affiliation(s)
- Elena
V. Moroz-Omori
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 171 65, Sweden
| | - Dwiantari Satyapertiwi
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Marie-Christine Ramel
- Department
of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Håkon Høgset
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Ilona K. Sunyovszki
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
- Division
of Cardiovascular Sciences, Myocardial Function, National Heart and
Lung Institute, Imperial College London, London W12 0NN, United Kingdom
| | - Ziqian Liu
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Jonathan P. Wojciechowski
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Yueyun Zhang
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Christopher L. Grigsby
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 171 65, Sweden
| | - Liliana Brito
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
- Division
of Cardiovascular Sciences, Myocardial Function, National Heart and
Lung Institute, Imperial College London, London W12 0NN, United Kingdom
| | - Laurence Bugeon
- Department
of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Margaret J. Dallman
- Department
of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 171 65, Sweden
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7
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Progatzky F, Jha A, Wane M, Thwaites RS, Makris S, Shattock RJ, Johansson C, Openshaw PJ, Bugeon L, Hansel TT, Dallman MJ. Induction of innate cytokine responses by respiratory mucosal challenge with R848 in zebrafish, mice, and humans. J Allergy Clin Immunol 2019; 144:342-345.e7. [PMID: 31002833 PMCID: PMC6602583 DOI: 10.1016/j.jaci.2019.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 03/29/2019] [Accepted: 04/03/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Fränze Progatzky
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
| | - Akhilesh Jha
- National Heart and Lung Institute, Imperial Clinical Respiratory Research Unit (ICRRU) and Respiratory Infection, St Mary's Hospital, Imperial College London, London, United Kingdom
| | - Madina Wane
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
| | - Ryan S Thwaites
- National Heart and Lung Institute, Imperial Clinical Respiratory Research Unit (ICRRU) and Respiratory Infection, St Mary's Hospital, Imperial College London, London, United Kingdom
| | - Spyridon Makris
- National Heart and Lung Institute, Imperial Clinical Respiratory Research Unit (ICRRU) and Respiratory Infection, St Mary's Hospital, Imperial College London, London, United Kingdom
| | - Robin J Shattock
- Department of Infectious Diseases, Division of Medicine, Imperial College London, London, United Kingdom
| | - Cecilia Johansson
- National Heart and Lung Institute, Imperial Clinical Respiratory Research Unit (ICRRU) and Respiratory Infection, St Mary's Hospital, Imperial College London, London, United Kingdom
| | - Peter J Openshaw
- National Heart and Lung Institute, Imperial Clinical Respiratory Research Unit (ICRRU) and Respiratory Infection, St Mary's Hospital, Imperial College London, London, United Kingdom
| | - Laurence Bugeon
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
| | - Trevor T Hansel
- National Heart and Lung Institute, Imperial Clinical Respiratory Research Unit (ICRRU) and Respiratory Infection, St Mary's Hospital, Imperial College London, London, United Kingdom.
| | - Margaret J Dallman
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom.
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8
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Price RL, Bugeon L, Mostowy S, Makendi C, Wren BW, Williams HD, Willcocks SJ. In vitro and in vivo properties of the bovine antimicrobial peptide, Bactenecin 5. PLoS One 2019; 14:e0210508. [PMID: 30625198 PMCID: PMC6326515 DOI: 10.1371/journal.pone.0210508] [Citation(s) in RCA: 14] [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: 08/16/2018] [Accepted: 12/24/2018] [Indexed: 02/06/2023] Open
Abstract
Antimicrobial peptides (AMP), part of the innate immune system, are well studied for their ability to kill pathogenic microorganisms. However, many also possess important immunomodulatory effects, and this area has potential for the development of novel therapies to supplement traditional methods such as the use of antibiotics. Here, we characterise the microbicidal and immunomodulatory potential of the proline-rich bovine AMP, Bactenecin 5 (Bac5). We demonstrate broad antimicrobial activity, including against some mycobacterial species, which are important pathogens of fish, cattle and humans. Bac5 is able to activate macrophage-like THP-1 cells and can synergistically trigger the upregulation of tnf-α when co-stimulated with M. marinum. Furthermore, Bac5 sensitises A549 epithelial cells to stimulation with TNF-α. For the first time, we characterise the activity of Bac5 in vivo, and show it to be a potent chemokine for macrophages in the zebrafish (Danio rerio) embryo model of infection. Bac5 also supports the early recruitment of neutrophils in the presence of M. marinum. In the absence of host adaptive immunity, exogenous injected Bac5 is able to slow, although not prevent, infection of zebrafish with M. marinum.
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Affiliation(s)
- R. L. Price
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - L. Bugeon
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - S. Mostowy
- Department of Medicine, Imperial College London, United Kingdom
| | - C. Makendi
- Department of Pathogen Molecular Biology, The London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - B. W. Wren
- Department of Pathogen Molecular Biology, The London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - H. D. Williams
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - S. J. Willcocks
- Department of Pathogen Molecular Biology, The London School of Hygiene and Tropical Medicine, London, United Kingdom
- * E-mail:
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9
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Li SS, Xu LZ, Zhou W, Yao S, Wang CL, Xia JL, Wang HF, Kamran M, Xue XY, Dong L, Wang J, Ding XD, Bella L, Bugeon L, Xu J, Zheng FM, Dallman MJ, Lam EWF, Liu Q. p62/SQSTM1 interacts with vimentin to enhance breast cancer metastasis. Carcinogenesis 2017; 38:1092-1103. [PMID: 28968743 PMCID: PMC5862327 DOI: 10.1093/carcin/bgx099] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 09/11/2017] [Indexed: 11/23/2022] Open
Abstract
The signalling adaptor p62 is frequently overexpressed in numerous cancer types. Here, we found that p62 expression was elevated in metastatic breast cancer and its overexpression correlated with reduced metastasis- and relapse-free survival times. Analysis of p62 expression in breast cancer cell lines demonstrated that high p62 expression was associated with the invasive phenotypes of breast cancer. Indeed, silencing p62 expression attenuated the invasive phenotypes of highly metastatic cells, whereas overexpressing p62 promoted the invasion of non-metastatic cells in in vitro microfluidic model. Moreover, MDA-MB-231 cells with p62 depletion which were grown in a three-dimensional culture system exhibited a loss of invasive protrusions. Consistently, genetic ablation of p62 suppressed breast cancer metastasis in both zebrafish embryo and immunodeficient mouse models, as well as decreased tumourigenicity in vivo. To explore the molecular mechanism by which p62 promotes breast cancer invasion, we performed a co-immunoprecipitation–mass spectrometry analysis and revealed that p62 interacted with vimentin, which mediated the function of p62 in promoting breast cancer invasion. Vimentin protein expression was downregulated upon p62 suppression and upregulated with p62 overexpression in breast cancer cells. Linear regression analysis of clinical breast cancer specimens showed a positive correlation between p62 and vimentin protein expression. Together, our findings provide strong evidence that p62 functions as a tumour metastasis promoter by binding vimentin and promoting its expression. This finding might help to develop novel molecular therapeutic strategies for breast cancer metastasis treatment.
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Affiliation(s)
- Si-Si Li
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Ling-Zhi Xu
- Department of Oncology, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Wei Zhou
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Shang Yao
- Department of Surgery and Cancer, Imperial College London, London W12 0NN, UK
| | - Chun-Li Wang
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Jiang-Long Xia
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - He-Fei Wang
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Muhammad Kamran
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xiao-Yuan Xue
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Lin Dong
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Jing Wang
- Department of Oncology, the First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xu-Dong Ding
- Department of Pathology, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Laura Bella
- Department of Surgery and Cancer, Imperial College London, London W12 0NN, UK
| | - Laurence Bugeon
- Department of Surgery and Cancer, Imperial College London, London W12 0NN, UK
| | - Jie Xu
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Fei-Meng Zheng
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Margaret J Dallman
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
| | - Eric W F Lam
- Department of Surgery and Cancer, Imperial College London, London W12 0NN, UK
| | - Quentin Liu
- Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
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10
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Watson T, Andrews N, Davis S, Bugeon L, Dallman MD, McGinty J. OPTiM: Optical projection tomography integrated microscope using open-source hardware and software. PLoS One 2017; 12:e0180309. [PMID: 28700724 PMCID: PMC5507440 DOI: 10.1371/journal.pone.0180309] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/13/2017] [Indexed: 12/04/2022] Open
Abstract
We describe the implementation of an OPT plate to perform optical projection tomography (OPT) on a commercial wide-field inverted microscope, using our open-source hardware and software. The OPT plate includes a tilt adjustment for alignment and a stepper motor for sample rotation as required by standard projection tomography. Depending on magnification requirements, three methods of performing OPT are detailed using this adaptor plate: a conventional direct OPT method requiring only the addition of a limiting aperture behind the objective lens; an external optical-relay method allowing conventional OPT to be performed at magnifications >4x; a remote focal scanning and region-of-interest method for improved spatial resolution OPT (up to ~1.6 μm). All three methods use the microscope’s existing incoherent light source (i.e. arc-lamp) and all of its inherent functionality is maintained for day-to-day use. OPT acquisitions are performed on in vivo zebrafish embryos to demonstrate the implementations’ viability.
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Affiliation(s)
- Thomas Watson
- Photonics Group, Department of Physics, Imperial College, London, United Kingdom
- * E-mail:
| | - Natalie Andrews
- Photonics Group, Department of Physics, Imperial College, London, United Kingdom
- Department of Life Sciences, Imperial College, London, United Kingdom
| | - Samuel Davis
- Photonics Group, Department of Physics, Imperial College, London, United Kingdom
| | - Laurence Bugeon
- Department of Life Sciences, Imperial College, London, United Kingdom
| | | | - James McGinty
- Photonics Group, Department of Physics, Imperial College, London, United Kingdom
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11
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Kumar S, Lockwood N, Ramel MC, Correia T, Ellis M, Alexandrov Y, Andrews N, Patel R, Bugeon L, Dallman MJ, Brandner S, Arridge S, Katan M, McGinty J, Frankel P, French PM. Quantitative in vivo optical tomography of cancer progression & vasculature development in adult zebrafish. Oncotarget 2016; 7:43939-43948. [PMID: 27259259 PMCID: PMC5190069 DOI: 10.18632/oncotarget.9756] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 04/28/2016] [Indexed: 12/16/2022] Open
Abstract
We describe a novel approach to study tumour progression and vasculature development in vivo via global 3-D fluorescence imaging of live non-pigmented adult zebrafish utilising angularly multiplexed optical projection tomography with compressive sensing (CS-OPT). This "mesoscopic" imaging method bridges a gap between established ~μm resolution 3-D fluorescence microscopy techniques and ~mm-resolved whole body planar imaging and diffuse tomography. Implementing angular multiplexing with CS-OPT, we demonstrate the in vivo global imaging of an inducible fluorescently labelled genetic model of liver cancer in adult non-pigmented zebrafish that also present fluorescently labelled vasculature. In this disease model, addition of a chemical inducer (doxycycline) drives expression of eGFP tagged oncogenic K-RASV12 in the liver of immune competent animals. We show that our novel in vivo global imaging methodology enables non-invasive quantitative imaging of the development of tumour and vasculature throughout the progression of the disease, which we have validated against established methods of pathology including immunohistochemistry. We have also demonstrated its potential for longitudinal imaging through a study of vascular development in the same zebrafish from early embryo to adulthood. We believe that this instrument, together with its associated analysis and data management tools, constitute a new platform for in vivo cancer studies and drug discovery in zebrafish disease models.
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Affiliation(s)
- Sunil Kumar
- Department of Physics, Imperial College London, London SW7 2AZ, UK
| | - Nicola Lockwood
- Department of Physics, Imperial College London, London SW7 2AZ, UK
- Division of Medicine, University College London, London WC1E 6JF, UK
- CoMPLEX, University College London, London WC1E 6BT, UK
| | - Marie-Christine Ramel
- Division of Medicine, University College London, London WC1E 6JF, UK
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
| | - Teresa Correia
- Department of Computer Science, University College London, London WC1E 6BT, UK
| | - Matthew Ellis
- Department of Neurodegenerative Disease, UCL Institute of Neurology, London WC1N 3BG, UK
| | - Yuriy Alexandrov
- Department of Physics, Imperial College London, London SW7 2AZ, UK
| | - Natalie Andrews
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
- Institute of Chemical Biology, Department of Chemistry, Imperial College, London SW7 2AZ, UK
| | - Rachel Patel
- Division of Medicine, University College London, London WC1E 6JF, UK
| | - Laurence Bugeon
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
| | | | - Sebastian Brandner
- Department of Neurodegenerative Disease, UCL Institute of Neurology, London WC1N 3BG, UK
- Division of Neuropathology, The National Hospital for Neurology and Neurosurgery, University College London NHS Foundation Trust, London WC1N 3BG, UK
| | - Simon Arridge
- Department of Computer Science, University College London, London WC1E 6BT, UK
| | - Matilda Katan
- Division of Structural and Molecular Biology, University College London, London WC1E 6BT, UK
| | - James McGinty
- Department of Physics, Imperial College London, London SW7 2AZ, UK
| | - Paul Frankel
- Division of Medicine, University College London, London WC1E 6JF, UK
| | - Paul M.W. French
- Department of Physics, Imperial College London, London SW7 2AZ, UK
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12
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Andrews N, Ramel MC, Kumar S, Alexandrov Y, Kelly DJ, Warren SC, Kerry L, Lockwood N, Frolov A, Frankel P, Bugeon L, McGinty J, Dallman MJ, French PMW. Visualising apoptosis in live zebrafish using fluorescence lifetime imaging with optical projection tomography to map FRET biosensor activity in space and time. J Biophotonics 2016; 9:414-24. [PMID: 26753623 PMCID: PMC4858816 DOI: 10.1002/jbio.201500258] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 11/25/2015] [Accepted: 11/27/2015] [Indexed: 05/14/2023]
Abstract
Fluorescence lifetime imaging (FLIM) combined with optical projection tomography (OPT) has the potential to map Förster resonant energy transfer (FRET) readouts in space and time in intact transparent or near transparent live organisms such as zebrafish larvae, thereby providing a means to visualise cell signalling processes in their physiological context. Here the first application of FLIM OPT to read out biological function in live transgenic zebrafish larvae using a genetically expressed FRET biosensor is reported. Apoptosis, or programmed cell death, is mapped in 3-D by imaging the activity of a FRET biosensor that is cleaved by Caspase 3, which is a key effector of apoptosis. Although apoptosis is a naturally occurring process during development, it can also be triggered in a variety of ways, including through gamma irradiation. FLIM OPT is shown here to enable apoptosis to be monitored over time, in live zebrafish larvae via changes in Caspase 3 activation following gamma irradiation at 24 hours post fertilisation. Significant apoptosis was observed at 3.5 hours post irradiation, predominantly in the head region.
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Affiliation(s)
- Natalie Andrews
- Institute of Chemical Biology, Department of Chemistry, Imperial College London, SW7 2AZ, UK
- Department of Life Sciences, , Imperial College London, SW7 2AZ, UK
- Photonics Group, Department of Physics, Prince Consort Road, Imperial College London, SW7 2AZ, UK
| | - Marie-Christine Ramel
- Department of Life Sciences, , Imperial College London, SW7 2AZ, UK
- Division of Medicine, University College London, Gower Street, London, WC1E 6BT, UK
| | - Sunil Kumar
- Photonics Group, Department of Physics, Prince Consort Road, Imperial College London, SW7 2AZ, UK
| | - Yuriy Alexandrov
- Photonics Group, Department of Physics, Prince Consort Road, Imperial College London, SW7 2AZ, UK
| | - Douglas J Kelly
- Photonics Group, Department of Physics, Prince Consort Road, Imperial College London, SW7 2AZ, UK
| | - Sean C Warren
- Photonics Group, Department of Physics, Prince Consort Road, Imperial College London, SW7 2AZ, UK
| | - Louise Kerry
- Department of Life Sciences, , Imperial College London, SW7 2AZ, UK
| | - Nicola Lockwood
- Division of Medicine, University College London, Gower Street, London, WC1E 6BT, UK
- COMPLEX, University College London, Gower Street, London, WC1E 6BT, UK
| | - Antonina Frolov
- Division of Medicine, University College London, Gower Street, London, WC1E 6BT, UK
| | - Paul Frankel
- Division of Medicine, University College London, Gower Street, London, WC1E 6BT, UK
| | - Laurence Bugeon
- Department of Life Sciences, , Imperial College London, SW7 2AZ, UK
| | - James McGinty
- Photonics Group, Department of Physics, Prince Consort Road, Imperial College London, SW7 2AZ, UK
| | | | - Paul M W French
- Photonics Group, Department of Physics, Prince Consort Road, Imperial College London, SW7 2AZ, UK.
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13
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Progatzky F, Cook HT, Lamb JR, Bugeon L, Dallman MJ. Mucosal inflammation at the respiratory interface: a zebrafish model. Am J Physiol Lung Cell Mol Physiol 2016; 310:L551-61. [PMID: 26719149 PMCID: PMC4796261 DOI: 10.1152/ajplung.00323.2015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 12/23/2015] [Indexed: 12/19/2022] Open
Abstract
Inflammatory diseases of the respiratory system such as asthma and chronic obstructive pulmonary disease are increasing globally and remain poorly understood conditions. Although attention has long focused on the activation of type 1 and type 2 helper T cells of the adaptive immune system in these diseases, it is becoming increasingly apparent that there is also a need to understand the contributions and interactions between innate immune cells and the epithelial lining of the respiratory system. Cigarette smoke predisposes the respiratory tissue to a higher incidence of inflammatory disease, and here we have used zebrafish gills as a model to study the effect of cigarette smoke on the respiratory epithelium. Zebrafish gills fulfill the same gas-exchange function as the mammalian airways and have a similar structure. Exposure to cigarette smoke extracts resulted in an increase in transcripts of the proinflammatory cytokines TNF-α, IL-1β, and MMP9 in the gill tissue, which was at least in part mediated via NF-κB activation. Longer term exposure of fish for 6 wk to cigarette smoke extract resulted in marked structural changes to the gills with lamellar fusion and mucus cell formation, while signs of inflammation or fibrosis were absent. This shows, for the first time, that zebrafish gills are a relevant model for studying the effect of inflammatory stimuli on a respiratory epithelium, since they mimic the immunopathology involved in respiratory inflammatory diseases of humans.
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Affiliation(s)
- Fränze Progatzky
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom; and
| | - H Terence Cook
- Department of Medicine, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Jonathan R Lamb
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom; and
| | - Laurence Bugeon
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom; and
| | - Margaret J Dallman
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom; and
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14
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Jones PJM, Sim A, Taylor HB, Bugeon L, Dallman MJ, Pereira B, Stumpf MPH, Liepe J. Inference of random walk models to describe leukocyte migration. Phys Biol 2015; 12:066001. [DOI: 10.1088/1478-3975/12/6/066001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Progatzky F, Sangha NJ, Yoshida N, McBrien M, Cheung J, Shia A, Scott J, Marchesi JR, Lamb JR, Bugeon L, Dallman MJ. Dietary cholesterol directly induces acute inflammasome-dependent intestinal inflammation. Nat Commun 2014; 5:5864. [PMID: 25536194 PMCID: PMC4284652 DOI: 10.1038/ncomms6864] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 11/14/2014] [Indexed: 02/06/2023] Open
Abstract
Prolonged ingestion of a cholesterol- or saturated fatty acid-enriched diet induces chronic, often systemic, auto-inflammatory responses resulting in significant health problems worldwide. In vivo information regarding the local and direct inflammatory effect of these dietary components in the intestine and, in particular, on the intestinal epithelium is lacking. Here we report that both mice and zebrafish exposed to high-fat (HFDs) or high-cholesterol (HCDs) diets develop acute innate inflammatory responses within hours, reflected in the localized interleukin-1β-dependent accumulation of myeloid cells in the intestine. Acute HCD-induced intestinal inflammation is dependent on cholesterol uptake via Niemann-Pick C1-like 1 and inflammasome activation involving apoptosis-associated Speck-like protein containing a caspase recruitment domain, which leads to Caspase-1 activity in intestinal epithelial cells. Extended exposure to HCD results in localized, inflammation-dependent, functional dysregulation as well as systemic pathologies. Our model suggests that dietary cholesterol initiates intestinal inflammation in epithelial cells. Chronic consumption of a Western-type diet leads to systemic inflammation of undefined origin, which contributes to metabolic disease. Here Progatzky et al. identify an immediate early step in the process by showing that dietary cholesterol rapidly activates inflammasomes in the gut epithelium.
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Affiliation(s)
- Fränze Progatzky
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK
| | - Navjyot J Sangha
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK
| | - Nagisa Yoshida
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK
| | - Marie McBrien
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK
| | - Jackie Cheung
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK
| | - Alice Shia
- 1] Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK [2] National Heart and Lung Institute, Imperial College London, London W12 0NN, UK
| | - James Scott
- National Heart and Lung Institute, Imperial College London, London W12 0NN, UK
| | - Julian R Marchesi
- 1] Computational and Systems Medicine, Faculty of Medicine, Department of Surgery and Cancer, Imperial College London, London SW7 2AZ, UK [2] Section of Hepatology, Imperial College London, Norfolk Place, London W2 1NY, UK [3] Centre for Digestive and Gut Health, Imperial College London, London W2 1NY, UK [4] School of Biosciences, Cardiff University, Museum Avenue, Cardiff CF10 3AX, UK
| | - Jonathan R Lamb
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK
| | - Laurence Bugeon
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK
| | - Margaret J Dallman
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, UK
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16
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Taylor HB, Liepe J, Barthen C, Bugeon L, Huvet M, Kirk PDW, Brown SB, Lamb JR, Stumpf MPH, Dallman MJ. P38 and JNK have opposing effects on persistence of in vivo leukocyte migration in zebrafish. Immunol Cell Biol 2013; 91:60-9. [PMID: 23165607 PMCID: PMC3540327 DOI: 10.1038/icb.2012.57] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 08/24/2012] [Accepted: 08/25/2012] [Indexed: 01/11/2023]
Abstract
The recruitment and migration of macrophages and neutrophils is an important process during the early stages of the innate immune system in response to acute injury. Transgenic pu.1:EGFP zebrafish permit the acquisition of leukocyte migration trajectories during inflammation. Currently, these high-quality live-imaging data are mainly analysed using general statistics, for example, cell velocity. Here, we present a spatio-temporal analysis of the cell dynamics using transition matrices, which provide information of the type of cell migration. We find evidence that leukocytes exhibit types of migratory behaviour, which differ from previously described random walk processes. Dimethyl sulfoxide treatment decreased the level of persistence at early time points after wounding and ablated temporal dependencies observed in untreated embryos. We then use pharmacological inhibition of p38 and c-Jun N-terminal kinase mitogen-activated protein kinases to determine their effects on in vivo leukocyte migration patterns and discuss how they modify the characteristics of the cell migration process. In particular, we find that their respective inhibition leads to decreased and increased levels of persistent motion in leukocytes following wounding. This example shows the high level of information content, which can be gained from live-imaging data if appropriate statistical tools are used.
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Affiliation(s)
- Harriet B Taylor
- Department of Life Sciences, Division of Cell and Molecular Biology, Imperial College London, London, UK
| | - Juliane Liepe
- Department of Life Sciences, Centre for Bioinformatics, Division of Molecular Biosciences, Imperial College London, London, UK
| | - Charlotte Barthen
- Department of Life Sciences, Division of Cell and Molecular Biology, Imperial College London, London, UK
| | - Laurence Bugeon
- Department of Life Sciences, Division of Cell and Molecular Biology, Imperial College London, London, UK
| | - Maxime Huvet
- Department of Life Sciences, Centre for Bioinformatics, Division of Molecular Biosciences, Imperial College London, London, UK
| | - Paul DW Kirk
- Department of Life Sciences, Centre for Bioinformatics, Division of Molecular Biosciences, Imperial College London, London, UK
- Institute of Mathematical Sciences, Imperial College London, London, UK
| | - Simon B Brown
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK
| | - Jonathan R Lamb
- Department of Life Sciences, Division of Cell and Molecular Biology, Imperial College London, London, UK
| | - Michael PH Stumpf
- Department of Life Sciences, Centre for Bioinformatics, Division of Molecular Biosciences, Imperial College London, London, UK
- Institute of Mathematical Sciences, Imperial College London, London, UK
- Department of Life Sciences, Centre for Integrative Systems Biology, Imperial College London, London, UK
| | - Margaret J Dallman
- Department of Life Sciences, Division of Cell and Molecular Biology, Imperial College London, London, UK
- Department of Life Sciences, Centre for Integrative Systems Biology, Imperial College London, London, UK
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17
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Le Friec G, Sheppard D, Whiteman P, Karsten CM, Shamoun SAT, Laing A, Bugeon L, Dallman MJ, Melchionna T, Chillakuri C, Smith RA, Drouet C, Couzi L, Fremeaux-Bacchi V, Köhl J, Waddington SN, McDonnell JM, Baker A, Handford PA, Lea SM, Kemper C. The CD46-Jagged1 interaction is critical for human TH1 immunity. Nat Immunol 2012; 13:1213-21. [PMID: 23086448 PMCID: PMC3505834 DOI: 10.1038/ni.2454] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 09/19/2012] [Indexed: 12/13/2022]
Abstract
CD46 is a complement regulator with important immune-related roles. CD46 functions as a pathogen receptor and is a potent co-stimulator for the induction of interferon-γ (IFN-γ)-secreting T helper 1 (TH1) effector T cells and their subsequent switch into interleukin-10 (IL-10)-producing regulatory T cells. Here, we identify the Notch protein family member Jagged1 as a new physiological ligand for CD46. Further, CD46 regulates Notch receptors and ligands expression during T cell activation and disturbance of the CD46-Notch crosstalk impedes IFN-γ induction and IL-10 switching. Importantly, CD4+ T cells from CD46-deficient patients and patients with hypomorphic Jagged1 mutations (Alagille Syndrome) fail to mount appropriate TH1 responses in vitro and in vivo suggesting that CD46-Jagged1 crosstalk is responsible for the recurrent infections in subpopulations of these patients.
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Affiliation(s)
- Gaëlle Le Friec
- Division of Transplantation Immunology and Mucosal Biology, MRC Centre for Transplantation, King's College London, Guy's Hospital, London, UK
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18
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Progatzky F, Taylor H, Bugeon L, Cassidy S, Radbruch A, Dallman MJ, Lamb JR. The role of Nfil3 in zebrafish hematopoiesis. Dev Comp Immunol 2012; 38:187-192. [PMID: 22561072 DOI: 10.1016/j.dci.2012.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 04/16/2012] [Accepted: 04/19/2012] [Indexed: 05/31/2023]
Abstract
Nfil3, a transcription factor that has an array of functions in immune cells, has been described as key regulator of CD8α(+) dendritic cell and natural killer cell development in mice. In this report we show that Nfil3 is enriched in the myeloid compartment of adult zebrafish including eosinophils. Knockdown of Nfil3 in pu.1:GFP embryos resulted in a reduced number of myeloid cells as early as 24h post-fertilization, while erythropoiesis was unaffected. Using mpx and fms-fluorescent transgenic fish we found that all myeloid cell lineages, and in particular macrophages, had reduced numbers at 4days post-fertilization. This was reflected by less myeloid cells accumulating at a wound site. Pu.1, l-plastin, csf1r and mpx had reduced expression in Nfil3 morphants while runx1, gata1 and rag1 were unaffected. Collectively, these results describe a conserved expression pattern of Nfil3 in evolutionarily divergent species and indicate that Nfil3 is central to myeloid lineage commitment.
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Affiliation(s)
- Fränze Progatzky
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, London, UK.
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Gentle ME, Rose A, Bugeon L, Dallman MJ. Noncanonical Notch signaling modulates cytokine responses of dendritic cells to inflammatory stimuli. J Immunol 2012; 189:1274-84. [PMID: 22753939 DOI: 10.4049/jimmunol.1103102] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Dendritic cell (DC)-derived cytokines play a key role in specifying adaptive immune responses tailored to the type of pathogen encountered and the local tissue environment. However, little is known about how DCs perceive the local environment. We investigated whether endogenous Notch signaling could affect DC responses to pathogenic stimuli. We demonstrate that concurrent Notch and TLR stimulation results in a unique cytokine profile in mouse bone-marrow derived DCs characterized by enhanced IL-10 and IL-2, and reduced IL-12 expression compared with TLR ligation alone. Unexpectedly, modulation of cytokine production occurred through a noncanonical Notch signaling pathway, independent of γ-secretase activity. Modulation required de novo protein synthesis, and PI3K, JNK, and ERK activity were necessary for enhanced IL-2 expression, whereas modulation of IL-10 required only PI3K activity. Further, we show that this γ-secretase-independent Notch pathway can induce PI3K activity. In contrast, expression of the canonical Notch target gene Hes1 was suppressed in DCs stimulated with Notch and TLR ligands simultaneously. Thus, our data suggest that Notch acts as an endogenous signal that modulates cytokine expression of DCs through a noncanonical pathway and therefore has the potential to tailor the subsequent adaptive immune response in a tissue- and/or stage-dependent manner.
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Affiliation(s)
- Madeleine E Gentle
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
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Chen L, McGinty J, Taylor HB, Bugeon L, Lamb JR, Dallman MJ, French PMW. Incorporation of an experimentally determined MTF for spatial frequency filtering and deconvolution during optical projection tomography reconstruction. Opt Express 2012; 20:7323-37. [PMID: 22453413 DOI: 10.1364/oe.20.007323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
We demonstrate two techniques to improve the quality of reconstructed optical projection tomography (OPT) images using the modulation transfer function (MTF) as a function of defocus experimentally determined from tilted knife-edge measurements. The first employs a 2-D binary filter based on the MTF frequency cut-off as an additional filter during back-projection reconstruction that restricts the high frequency information to the region around the focal plane and progressively decreases the spatial frequency bandwidth with defocus. This helps to suppress "streak" artifacts in OPT data acquired at reduced angular sampling, thereby facilitating faster OPT acquisitions. This method is shown to reduce the average background by approximately 72% for an NA of 0.09 and by approximately 38% for an NA of 0.07 compared to standard filtered back-projection. As a biological illustration, a Fli:GFP transgenic zebrafish embryo (3 days post-fertilisation) was imaged to demonstrate the improved imaging speed (a quarter of the acquisition time). The second method uses the MTF to produce an appropriate deconvolution filter that can be used to correct for the spatial frequency modulation applied by the imaging system.
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Affiliation(s)
- Lingling Chen
- Photonics Group, Department of Physics, Imperial College London, SW7 2AZ, UK.
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Liepe J, Taylor H, Barnes CP, Huvet M, Bugeon L, Thorne T, Lamb JR, Dallman MJ, Stumpf MPH. Calibrating spatio-temporal models of leukocyte dynamics against in vivo live-imaging data using approximate Bayesian computation. Integr Biol (Camb) 2012; 4:335-345. [PMID: 22327539 PMCID: PMC5058438 DOI: 10.1039/c2ib00175f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In vivo studies allow us to investigate biological processes at the level of the organism. But not all aspects of in vivo systems are amenable to direct experimental measurements. In order to make the most of such data we therefore require statistical tools that allow us to obtain reliable estimates for e.g. kinetic in vivo parameters. Here we show how we can use approximate Bayesian computation approaches in order to analyse leukocyte migration in zebrafish embryos in response to injuries. We track individual leukocytes using live imaging following surgical injury to the embryos' tail-fins. The signalling gradient that leukocytes follow towards the site of the injury cannot be directly measured but we can estimate its shape and how it changes with time from the directly observed patterns of leukocyte migration. By coupling simple models of immune signalling and leukocyte migration with the unknown gradient shape into a single statistical framework we can gain detailed insights into the tissue-wide processes that are involved in the innate immune response to wound injury. In particular we find conclusive evidence for a temporally and spatially changing signalling gradient that modulates the changing activity of the leukocyte population in the embryos. We conclude with a robustness analysis which highlights the most important factors determining the leukocyte dynamics. Our approach relies only on the ability to simulate numerically the process under investigation and is therefore also applicable in other in vivo contexts and studies.
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Affiliation(s)
- Juliane Liepe
- Centre for Integrative Systems Biology and Bioinformatics, Division of Molecular Biosciences, Department of Life Sciences, Imperial College London, London, UK
| | - Harriet Taylor
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, London, UK
- MRC Centre for Inflammation Research, Queens Medical Research Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK
| | - Chris P. Barnes
- Centre for Integrative Systems Biology and Bioinformatics, Division of Molecular Biosciences, Department of Life Sciences, Imperial College London, London, UK
| | - Maxime Huvet
- Centre for Integrative Systems Biology and Bioinformatics, Division of Molecular Biosciences, Department of Life Sciences, Imperial College London, London, UK
| | - Laurence Bugeon
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, London, UK
| | - Thomas Thorne
- Centre for Integrative Systems Biology and Bioinformatics, Division of Molecular Biosciences, Department of Life Sciences, Imperial College London, London, UK
| | - Jonathan R. Lamb
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, London, UK
| | - Margaret J. Dallman
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, London, UK
- Centre for Integrative Systems Biology, Department of Life Sciences, Imperial College London, London, UK
| | - Michael P. H. Stumpf
- Centre for Integrative Systems Biology and Bioinformatics, Division of Molecular Biosciences, Department of Life Sciences, Imperial College London, London, UK
- Centre for Integrative Systems Biology, Department of Life Sciences, Imperial College London, London, UK
- Institute of Mathematical Sciences, Imperial College London, London, UK
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Bugeon L, Taylor HB, Progatzky F, Lin MI, Ellis CD, Welsh N, Smith E, Vargesson N, Gray C, Renshaw SA, Chico TJA, Zon LI, Lamb J, Dallman MJ. The NOTCH pathway contributes to cell fate decision in myelopoiesis. Haematologica 2011; 96:1753-60. [PMID: 21933862 DOI: 10.3324/haematol.2011.044115] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Controversy persists regarding the role of Notch signaling in myelopoiesis. We have used genetic approaches, employing two Notch zebrafish mutants deadly seven (DES) and beamter (BEA) with disrupted function of notch1a and deltaC, respectively, and Notch1a morphants to analyze the development of leukocyte populations in embryonic and mature fish. DESIGN AND METHODS Myelomonocytes were quantified in early embryos by in situ hybridization using a myeloper-oxidase (mpx) probe. Morpholinos were used to knock down expression of Notch1a or DeltaC. Wound healing assays and/or flow cytometry were used to quantify myelomonocytes in 5-day post-fertilization (dpf) Notch mutants (BEA and DES), morphants or pu.1:GFP, mpx:GFP and fms:RFP transgenic embryos. Flow cytometry was performed on 2-3 month old mutant fish. RESULTS The number of mpx(+) cells in embryos was reduced at 48 hpf (but not at 26 hpf) in DES compared to WT. At 5 dpf this was reflected by a reduction in the number of myelomonocytic cells found at the wound site in mutants and in Notch1a morphants. This was due to a reduced number of myelomonocytes developing rather than a deficit in the migratory ability since transient inhibition of Notch signaling using DAPT had no effect. The early deficit in myelopoiesis was maintained into later life, 2-3 month old BEA and DES fish having a decreased proportion of myelomonocytes in both the hematopoietic organ (kidney marrow) and the periphery (coelomic cavity). CONCLUSIONS Our results indicate that defects in Notch signaling affect definitive hematopoiesis, altering myelopoiesis from the early stages of development into the adult.
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McGinty J, Taylor HB, Chen L, Bugeon L, Lamb JR, Dallman MJ, French PMW. In vivo fluorescence lifetime optical projection tomography. Biomed Opt Express 2011; 2:1340-50. [PMID: 21559145 PMCID: PMC3087590 DOI: 10.1364/boe.2.001340] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 04/21/2011] [Accepted: 04/21/2011] [Indexed: 05/21/2023]
Abstract
We demonstrate the application of fluorescence lifetime optical projection tomography (FLIM-OPT) to in vivo imaging of lysC:GFP transgenic zebrafish embryos (Danio rerio). This method has been applied to unambiguously distinguish between the fluorescent protein (GFP) signal in myeloid cells from background autofluorescence based on the fluorescence lifetime. The combination of FLIM, an inherently ratiometric method, in conjunction with OPT results in a quantitative 3-D tomographic technique that could be used as a robust method for in vivo biological and pharmaceutical research, for example as a readout of Förster resonance energy transfer based interactions.
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Affiliation(s)
- James McGinty
- Photonics Group, Department of Physics, Imperial College London, SW7 2AZ, UK
| | - Harriet B. Taylor
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, SW7 2AZ, UK
| | - Lingling Chen
- Photonics Group, Department of Physics, Imperial College London, SW7 2AZ, UK
| | - Laurence Bugeon
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, SW7 2AZ, UK
| | - Jonathan R. Lamb
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, SW7 2AZ, UK
| | - Margaret J. Dallman
- Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, SW7 2AZ, UK
- Centre for Integrative Systems Biology, Department of Life Sciences, Imperial College London, SW7 2AZ, UK
| | - Paul M. W. French
- Photonics Group, Department of Physics, Imperial College London, SW7 2AZ, UK
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Mollet G, Ratelade J, Boyer O, Muda AO, Morisset L, Lavin TA, Kitzis D, Dallman MJ, Bugeon L, Hubner N, Gubler MC, Antignac C, Esquivel EL. Podocin inactivation in mature kidneys causes focal segmental glomerulosclerosis and nephrotic syndrome. J Am Soc Nephrol 2009; 20:2181-9. [PMID: 19713307 DOI: 10.1681/asn.2009040379] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Podocin is a critical component of the glomerular slit diaphragm, and genetic mutations lead to both familial and sporadic forms of steroid-resistant nephrotic syndrome. In mice, constitutive absence of podocin leads to rapidly progressive renal disease characterized by mesangiolysis and/or mesangial sclerosis and nephrotic syndrome. Using established Cre-loxP technology, we inactivated podocin in the adult mouse kidney in a podocyte-specific manner. Progressive loss of podocin in the glomerulus recapitulated albuminuria, hypercholesterolemia, hypertension, and renal failure seen in nephrotic syndrome in humans. Lesions of FSGS appeared after 4 wk, with subsequent development of diffuse glomerulosclerosis and tubulointerstitial damage. Interestingly, conditional inactivation of podocin at birth resulted in a gradient of glomerular lesions, including mesangial proliferation, demonstrating a developmental stage dependence of renal histologic patterns of injury. The development of significant albuminuria in this model occurred only after early and focal foot process effacement had progressed to diffuse involvement, with complete absence of podocin immunolabeling at the slit diaphragm. Finally, we identified novel potential mediators and perturbed molecular pathways, including cellular proliferation, in the course of progression of renal disease leading to glomerulosclerosis, using global gene expression profiling.
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Bugeon L, Gardner LM, Rose A, Gentle M, Dallman MJ. Cutting Edge: Notch Signaling Induces a Distinct Cytokine Profile in Dendritic Cells That Supports T Cell-Mediated Regulation and IL-2-Dependent IL-17 Production. J Immunol 2008; 181:8189-93. [DOI: 10.4049/jimmunol.181.12.8189] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Abstract
BACKGROUND Members of the B7 costimulatory protein family (CD80 and CD86) play a determining role in allograft rejection. Both CD80 and CD86 have naturally occurring splice variants whose roles in transplantation are unknown. Full length CD80 has two immunoglobulin (Ig)-like domains in the extracellular portion, IgC and IgV. In mouse, the isoform IgV-CD80 lacks the IgC-like domain. Here we analyzed the role of mouse IgV-CD80 in heart allograft rejection and search for equivalent splice variants in human. METHODS Mice made deficient for full-length CD80 but which retain expression of the shorter IgV-CD80 (CD80 mice) were used as donor or recipient of a heart allograft. Recipient animals were untreated or pretreated with alloantigen expressing cells and/or treated with CD80 and CTLA4 monoclonal antibodies (mAbs). RESULTS Recipients expressing IgV-CD80 but not full length CD80 exhibited a slight prolongation in survival of either wild-type (Wt) or CD80 grafts. More dramatically, CD80 animals pretreated with donor alloantigen exhibited permanent graft survival, whereas their Wt counterparts rejected their grafts with a median survival of 24 days. This prolonged survival was due to the expression of IgV-CD80 in recipients since treatment with CD80 mAb abrogated the beneficial effect observed. We identified and report here a similar isoform of CD80 from human cDNA encoding a putative soluble, IgV-containing protein. CONCLUSIONS IgV-CD80 bearing recipients show enhanced allograft survival especially after donor alloantigen pretreatment. This together with data from other species suggests that regulation delivered by splice variants of CD80 significantly modulates immunity and may be common across the species.
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Affiliation(s)
- Laurence Bugeon
- Section of Immunology and Infection and CMMI, Division of Cell and Molecular Biology, Imperial College London, London, United Kingdom.
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Wagner KD, Wagner N, Guo JK, Elger M, Dallman MJ, Bugeon L, Schedl A. An Inducible Mouse Model for PAX2-Dependent Glomerular Disease: Insights into a Complex Pathogenesis. Curr Biol 2006; 16:793-800. [PMID: 16631587 DOI: 10.1016/j.cub.2006.02.072] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2005] [Revised: 02/27/2006] [Accepted: 02/28/2006] [Indexed: 11/28/2022]
Abstract
Pax2 is a transcription factor with important functions during kidney development . Ectopic expression of Pax2 in podocytes has been reported in various glomerular diseases , but the functional relevance remains unknown. We developed an inducible mouse model that allows activation of Pax2 specifically in podocytes. Persistent expression of Pax2 did not interfere with the initial differentiation of podocytes, but mice ectopically expressing PAX2 developed end-stage renal failure soon after birth. Similarly, activation of PAX2 in healthy adult animals resulted in renal disease within 3 weeks after podocyte-specific induction of a deleter Cre. PAX2 activation caused repression of the podocyte key regulator molecule Wt1 and consequently a dramatic reduction of nephrin expression. Recruitment of the groucho-related protein TLE4 may be involved in converting Pax2 into a transcriptional repressor of Wt1. Finally, treatment of mice with an angiotensin-converting enzyme (ACE) inhibitor normalized renal function and induced upregulation of the important structural molecule nephrin via a Wt1-independent pathway. Our data demonstrate the functional significance of PAX2 reexpression in mature podocytes for the development of glomerular diseases and suggest that reactivation of PAX genes in terminally differentiated cells leads to a more dedifferentiated phenotype.
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Tolmachova T, Anders R, Abrink M, Bugeon L, Dallman MJ, Futter CE, Ramalho JS, Tonagel F, Tanimoto N, Seeliger MW, Huxley C, Seabra MC. Independent degeneration of photoreceptors and retinal pigment epithelium in conditional knockout mouse models of choroideremia. J Clin Invest 2006; 116:386-94. [PMID: 16410831 PMCID: PMC1326146 DOI: 10.1172/jci26617] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2005] [Accepted: 11/01/2005] [Indexed: 01/09/2023] Open
Abstract
Choroideremia (CHM) is an X-linked degeneration of the retinal pigment epithelium (RPE), photoreceptors, and choroid, caused by loss of function of the CHM/REP1 gene. REP1 is involved in lipid modification (prenylation) of Rab GTPases, key regulators of intracellular vesicular transport and organelle dynamics. To study the pathogenesis of CHM and to develop a model for assessing gene therapy, we have created a conditional mouse knockout of the Chm gene. Heterozygous-null females exhibit characteristic hallmarks of CHM: progressive degeneration of the photoreceptors, patchy depigmentation of the RPE, and Rab prenylation defects. Using tamoxifen-inducible and tissue-specific Cre expression in combination with floxed Chm alleles, we show that CHM pathogenesis involves independently triggered degeneration of photoreceptors and the RPE, associated with different subsets of defective Rabs.
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Affiliation(s)
- Tanya Tolmachova
- Molecular and Cellular Medicine Section, Division of Biomedical Sciences, Imperial College London, London, United Kingdom
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Holzenberger M, Tronche F, Bugeon L, Larue L. A French Academic Network for Sharing Transgenic Materials and Knowledge. Transgenic Res 2005; 14:801-2. [PMID: 16315086 DOI: 10.1007/s11248-005-1675-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2005] [Accepted: 08/03/2005] [Indexed: 11/24/2022]
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Abstract
Heritable RNA interference (RNAi), triggered from stably expressed transgenes with an inverted repeat (IR) configuration, is an important tool for reverse genetic studies. Here we report on the development of stable RNAi in Anopheles stephensi mosquitoes, the major vector of human malaria in Asia. Trans genic mosquitoes stably expressing a RNAi transgene, designed to produce intron-spliced double-stranded RNA (dsRNA) targeting the green fluorescent protein EGFP gene, were crossed to an EGFP-expressing target line. EGFP expression was dramatically reduced at both the protein and RNA levels. The levels of gene silencing depended upon the RNAi gene copy number and its site of integration. These results demonstrate that specific RNAi-mediated knockdown of gene function can be achieved with high efficiency in Anopheles . This will be invaluable to systematically unravel the function of Anopheles genes determining the vectorial capacity of the malaria parasite.
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Affiliation(s)
- Anthony E Brown
- Department of Biological Sciences, Imperial College London, Imperial College Road, London SW7 2AZ, UK
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Bugeon L, Danou A, Carpentier D, Langridge P, Syed N, Dallman MJ. Inducible gene silencing in podocytes: a new tool for studying glomerular function. J Am Soc Nephrol 2003; 14:786-91. [PMID: 12595517 DOI: 10.1097/01.asn.0000050222.86847.ea] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Glomerular filtration is one of the primary functions of the kidney. Podocytes, a highly specialized cell type found in glomeruli, are believed to play a critical role in that function. Null mutations of genes expressed in podocytes like WT1, nephrin, and NEPH1 result in an embryo and perinatal lethal phenotype and therefore do not allow the functional analysis of these genes in the adult kidney. Here is describes the generation of a model that will allow such studies. We have engineered transgenic mice in which the disruption of targeted genes can be induced in a temporally controlled fashion in podocytes. For this, a transgene encoding the mutated estrogen receptor-Cre recombinase fusion protein was introduced into the mouse genome. Animals were crossed with Z/AP reporter mice to test for efficient and inducible recombination. We found that, after injection of inducer drug tamoxifen, Cre fusion protein translocates to the nuclei of podocytes, where it becomes active and mediates recombination of DNA carrying loxP target sequences. These animals provide for the first time a tool for silencing genes selectively in podocytes of adult animals.
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Affiliation(s)
- Laurence Bugeon
- Section of Immunology & Infection and CMMI, Department of Biological Sciences, Sir Alexander Fleming Building, Imperial College London, UK.
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Bugeon L, Hargreaves RE, Crompton T, Outram S, Rahemtulla A, Porter AC, Dallman MJ. Selective silencing of full-length CD80 but not IgV-CD80 leads to impaired clonal deletion of self-reactive T cells and altered regulation of immune responses. Eur J Immunol 2001; 31:118-27. [PMID: 11169445 DOI: 10.1002/1521-4141(200101)31:1<118::aid-immu118>3.0.co;2-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Co-stimulation provided by the B7 family of proteins underpins the development of protective immunity. There are three identified members of this family: CD80, its splice variant IgV-CD80 and CD86. It has hitherto been difficult to analyze the expression and function of IgV-CD80 since there are no appropriate reagents capable of distinguishing it from CD80. We have generated mice, by gene targeting, the lack CD80 whilst maintaining expression of IgV-CD80. Mutant animals did not delete T cells bearing mammary tumor virus-reactive TCR as efficiently as wild-type animals. We also demonstrate the importance of IgV-CD80 in the responses of recently activated cells and reveal a role for CD80 in sustaining T cell responses. CD86, whilst critical to primary T cell activation, made only a minor contribution to re-activation of normal cells.
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Affiliation(s)
- L Bugeon
- Department of Biology, Imperial College of Science Technology and Medicine, London, GB.
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Abstract
Costimulation is critical to T cell activation. On the antigen-presenting cell the key players are found in the extended family of B7 genes comprising cd80, cd86, B7h/B7RP-1 and B7-H1. cd80 and cd86 encode proteins that bind to CD28 and CTLA4 on T cells. Blocking this pathway with the potent CTLA4-Ig fusion protein shows encouraging potential as a therapeutic agent. While cd80 and cd86 pathways act mainly on naive T cells, B7h/B7RP-1 and B7-H1 seem to exert their effects on antigen-experienced lymphocytes.
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Affiliation(s)
- L Bugeon
- Department of Biology, Imperial College of Science, Technology, and Medicine, London, United Kingdom
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Bugeon L, Syed N, Dallman MJ. A fast and efficient method for transiently transfecting ES cells: application to the development of systems for conditional gene expression. Transgenic Res 2000; 9:229-32. [PMID: 11032372 DOI: 10.1023/a:1008990510849] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Classically, mouse embryonic stem (ES) cells are transfected by electroporation, a method that requires a large number of cells. Here we describe a protocol using a liposome based transfection agent that is a very simple, rapid and cost effective way of transiently transfecting very low numbers of ES cells. We found this method very useful in screening a large number of ES clones when working with inducible expression systems in which at least two elements are required for regulated expression of the gene of interest. After stable transfection of the first component, clones can be easily and rapidly screened for expression of the gene of interest by transiently transfecting the second component of the system using this protocol.
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Affiliation(s)
- L Bugeon
- Department of Biology, Imperial College of Science Technology and Medicine, London, UK.
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Josien R, Pannetier C, Douillard P, Cantarovich D, Menoret S, Bugeon L, Kourilsky P, Soulillou JP, Cuturi MC. Graft-infiltrating T helper cells, CD45RC phenotype, and Th1/Th2-related cytokines in donor-specific transfusion-induced tolerance in adult rats. Transplantation 1995; 60:1131-9. [PMID: 7482721 DOI: 10.1097/00007890-199511270-00013] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Specific tolerance to LEW.1W (RT1u) heart allografts can be induced in adult LEW.1A (RT1a) rats by donor-specific blood transfusion (DST). We have previously shown that both rejected and tolerated grafts are heavily infiltrated by T lymphocytes, and that in both cases these T cells are capable of developing similar cytotoxic responses against donor cells in vitro; tolerance is therefore not due to the deletion of alloreactive T cells. At the same time, we found that the accumulation of IL-2 and IFN-gamma mRNA was decreased in tolerated grafts compared with rejected grafts. These results suggested that the induction of allograft tolerance in DST-treated animals could be mediated by anergy or suppression of graft-infiltrating Th1 cells. Although Th1 and Th2 clones have not yet been characterized in the rat, peripheral CD4+ rat T cells can be divided into two populations, based on their expression of the isoform RC of the CD45 molecule. Upon activation, CD45RChigh CD4+ T cells produce IL-2 and IFN-gamma and responsible for the induction of the graft-versus-host reaction, whereas CD45RClow CD4+ T cells produce IL-4 in vitro and provide B cell help. In the present study, we show that heart allografts from both DST-treated and untreated rats were infiltrated by equivalent numbers of leukocytes, of which CD4+ T cells also made up similar percentages. Among these CD4+ T cells, we observed that in allografts from DST-treated recipients the CD45RChigh population on day 5 was very significantly smaller (P = 0.004) than in the untreated group, while CD45RClow populations remained comparable. Moreover, using a new quantitative RT-PCR method, we found a dramatic reduction in the accumulation of IL-2, IFN-gamma, IL-10, IL-4, and IL-13 mRNA in hearts from DST-treated recipients compared with those of untreated recipients during the week following transplantation. These results show that in heart allografts from DST-treated recipients, despite phenotypic changes suggesting Th1 inhibition by Th2 imbalance, T helper function was inhibited as a whole, and that in vivo the phenotype CD4+ CD45RClow does not always correlate with Th2-related cytokine-producing cells.
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Affiliation(s)
- R Josien
- Institut National de la Santé et de la Recherche Médicale (INSERM U437), Immunointervention dans les Allo- et Xénotransplantations, Nantes, France
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Cuturi MC, Josien R, Cantarovich D, Bugeon L, Anegon I, Menoret S, Smit H, Douillard P, Soulillou JP. Decreased anti-donor major histocompatibility complex class I and increased class II alloantibody response in allograft tolerance in adult rats. Eur J Immunol 1994; 24:1627-31. [PMID: 8026523 DOI: 10.1002/eji.1830240726] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Permanent tolerance to allografts can be induced in adult rats by donor-specific transfusions (DST) prior to transplantation. We have previously reported, in a model of heart allograft, the presence of a heavy leukocyte infiltrate, in the allograft which displayed a strong allospecific cytotoxicity when tested in vitro against donor cells, and a strong accumulation of mRNA for granzyme A and perforin in vivo. In contrast, there was a major decrease in the accumulation of mRNA for interleukin-2 and interferon-gamma. These results suggested that the DST-induced tolerance was associated with a decrease in type-1 T helper (Th1) cell function. The major role of preformed antibodies in xeno and allorejection is clearly established. Nevertheless, the consequences of alloantibody production in acute rejection and tolerance induction remains to be elucidated. We here analyze the alloantibody response in rejecting and DST-treated recipients. We show that, after transplantation, tolerant recipients, in contrast to rejecting ones, mount a low IgM alloresponse that switches to low IgG production. Detailed analysis of IgG alloantibodies in DST-treated recipients revealed that their production decrease was not equally distributed. Whereas rejecting animals mounted a strong anti-class I and II IgG alloantibody response, DST-treated recipients produced anti-class II and low titers of anti-class I IgG alloantibodies. Furthermore, among IgG subclasses, tolerant recipients predominantly produced IgG2a, a profile which, in the rat, is compatible with a Th2-controlled response. Finally, the passive transfer of immune serum from rejecting animals to DST-treated recipients could abrogate the tolerance. We suggest that the absence of anti-class I alloantibodies combined with preserved and/or increased anti-class II production plays a major role in graft tolerance in this model. These results reinforced the role of alloantibodies in rejection and in induction of tolerance.
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Affiliation(s)
- M C Cuturi
- Institut National de la Santé et de la Recherche Médicale (INSERM U211), Nantes, France
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Parker KE, Bugeon L, Cuturi MC, Soulillou JP. Cloning of cDNA coding for the rat mu heavy chain constant region: differences between rat allotypes. Immunogenetics 1994; 39:159. [PMID: 8276460 DOI: 10.1007/bf00188621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- K E Parker
- Institut National pour la Santé et la Recherche Médicale (INSERM U211), Unité de Recherche sur les effecteurs lymphocytaires T, Nantes, France
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Bugeon L, Cuturi MC, Paineau J, Anegon I, Soulillou JP. Similar levels of granzyme A and perforin mRNA expression in rejected and tolerated heart allografts in donor-specific tolerance in rats. Transplantation 1993; 56:405-8. [PMID: 8356597 DOI: 10.1097/00007890-199308000-00030] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Congenic LEW.1W (RT1u) heart grafts in LEW.1A (RT1u) recipient rats are rejected within 15 +/- 6 days. Tolerance (> 100 days) can be induced by pretransplant donor-specific blood transfusions. In both cases, the graft is heavily infiltrated by recipient cells, and class I and class II molecules of the major histocompatibility complex are strongly expressed. Moreover, T lymphocytes extracted from both tolerated and rejected grafts are similarly cytotoxic in vitro against donor cells. However, it cannot be excluded that this cytotoxicity does not operate in vivo. To answer this important question, we have studied the expression of granzyme A and perforin mRNA expression, in situ, by Northern blotting. Our data show that the two corresponding mRNAs accumulate with the same kinetic and at the same level in rejected and tolerated grafts. These results strongly suggest that infiltrating cells are cytotoxic in vivo and that a "cellular rejection" does occur in the "tolerated" grafts. In addition, these findings show that cytotoxic T lymphocytes are not sufficient to impair graft survival and lead to a revaluation of the relevance, in general, terms of granzyme and perforin expression as a correlate of rejection.
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Affiliation(s)
- L Bugeon
- Institut National de la Santé et la Recherche Médicale (INSERM U211) Unité de recherche sur les effecteurs lymphocytaires T, Nantes, France
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Bugeon L, Cuturi MC, Paineau J, Chabannes D, Soulillou JP. Decreased IFN-gamma and IL-2 mRNA expression in peripheral tolerance to heart allografts with conserved granzyme A, perforin, and MHC antigens mRNA expression. Transplant Proc 1993; 25:314-6. [PMID: 8438315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- L Bugeon
- Institut National de la Santé et la Recherche Médicale (INSERM U211), Nantes, France
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42
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Bugeon L, Cuturi MC, Hallet MM, Paineau J, Chabannes D, Soulillou JP. Peripheral tolerance of an allograft in adult rats--characterization by low interleukin-2 and interferon-gamma mRNA levels and by strong accumulation of major histocompatibility complex transcripts in the graft. Transplantation 1992; 54:219-25. [PMID: 1496533 DOI: 10.1097/00007890-199208000-00006] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Congenic LEW.1W(RT1.u) heart grafts in LEW.1A(RT1.a) recipient rats are rejected in 15 +/- 6 days. Tolerance (greater than 100 days) can be induced by pretransplant donor-specific blood transfusion. In this case, the graft is not rejected, although it is infiltrated by mononuclear cells specifically cytotoxic, in vitro, against allogeneic donor splenocytes. We studied the expression of MHC class I and class II antigens, IFN-gamma, and IL-2 mRNA in the rejected and tolerated grafts by Northern blotting and in situ hybridization. Our data show that both class I and class II mRNA accumulate in both types of graft, and that class I mRNA accumulation occurs more rapidly in the tolerated grafts. IFN-gamma and IL-2 mRNA accumulate to lower levels and with delayed kinetics in the tolerated grafts compared with the rejected ones, suggesting a role for these lymphokines in the mechanism of rejection/tolerance in this model. This hypothesis is also supported by the observation that IFN-gamma treatment abrogates the induction of tolerance in the recipients receiving pretransplant donor blood transfusion. Furthermore, we observed an uncoupling of the accumulation of IFN-gamma mRNA and of MHC class I and class II mRNA. Our data confirm that the mechanisms of tolerance in this model depend, in part, on alterations of the IL-2/IL-2R pathway of lymphocyte activation but also clearly indicate a decrease of IFN-gamma mRNA accumulation, suggesting that the defect involves several activation molecules.
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Affiliation(s)
- L Bugeon
- Institut National de la Santé et de la Recherche Médicale (INSERM U211), Unité de Recherche sur les Effecteurs Lymphocytaires T, Plateau Technique du CHR, Nantes, France
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Blancho G, Buzelin F, Dantal J, Hourmant M, Cantarovich D, Baatard R, Bonneville M, Vie H, Bugeon L, Soulillou JP. Evidence that early acute renal failure may be mediated by CD3- CD16+ cells in a kidney graft recipient with large granular lymphocyte proliferation. Transplantation 1992; 53:1242-7. [PMID: 1534938 DOI: 10.1097/00007890-199206000-00014] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We report here on a patient with a large granular lymphocyte proliferative disease who received a third kidney allograft. This patient presented a lymphocytosis (culminating at approximately 30,000/mm3) with a large proportion (approximately 70%) of CD3- WT31- CD2+ CD16+ lymphocytes. Five days after a kidney graft and during prophylactic treatment by Ortho pan OKT3, he presented an acute graft failure with an apparent interruption of graft blood flow as assessed by the Tc99 scan pattern and an arteriogram. The biopsy showed an abnormal accumulation of intravascular CD3- CD16+ cells bound to endothelial cells with thrombilike patterns in small and middle-sized arteries, whereas CD3+ mononucleated cells infiltrate was restricted to interstitium as observed in his previous graft, performed before the appearance of the lymphoproliferative disorder. The syndrome resolved spontaneously. The role of OKT3-mediated release of cytokines able to upregulate endothelial cell adhesion molecules in triggering this phenomenon is discussed.
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Affiliation(s)
- G Blancho
- Service de Nephrologie-Immunologie Clinique, Centre Hospitalo-Universitaire de Nantes, France
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Jaisser F, Bugeon L, Blot-Chabaud M, Bonvalet JP, Farman N. Effects of AVP and dDAVP on PGE2 synthesis in superfused cortical collecting tubules. Am J Physiol 1989; 256:F1044-50. [PMID: 2500029 DOI: 10.1152/ajprenal.1989.256.6.f1044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Whereas interactions between antidiuretic hormone (ADH) and prostaglandins (PGs) have been reported in the cortical collecting tubule (CCD), the precise effects of arginine vasopressin (AVP) and its analogue, 1-desamino-8-D-arginine vasopressin (dDAVP) on PGE2 synthesis remain controversial. We examined the dynamic response of PGE2 synthesis to these two analogues in isolated rabbit CCD. Microdissected CCD were superfused, and basal and hormone-induced PGE2 synthesis were determined by enzyme immunoassay. Addition of arachidonic acid (AA) steeply increased basal PGE2 synthesis, in the 0-1 microM-dose range. The presence of AA was necessary to obtain a stimulatory effect of AVP on PGE2 synthesis. AVP induced an immediate, transitory, and dose-dependent stimulation of PGE2 synthesis. A maximal effect was obtained at 10(-8) M; PGE2 synthesis was increased by approximately 150-200% over the basal synthesis. With dDAVP, a very weak response was obtained only at 10(-7) M. From these results, we conclude that PGE2 synthesis in CCD is stimulated by ADH. This effect of ADH does not depend on the V2-receptor pathway and suggests the presence of V1-receptors in CCD.
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Affiliation(s)
- F Jaisser
- Institut National de la Santé et de la Recherche Médicale, Departement de Biologie/SBCe, Centre d'Etudes Nucléares de Saclay, Gif-sur-Yvette, France
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