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Affiliation(s)
- Alanna G. Spiteri
- Viral Immunopathology Laboratory, Infection, Immunity and Inflammation Research Theme, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia,Charles Perkins Centre, The University of Sydney, Australia
| | - Nicholas J.C. King
- Viral Immunopathology Laboratory, Infection, Immunity and Inflammation Research Theme, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia,Sydney Cytometry, The University of Sydney and Centenary Institute, Sydney, NSW, Australia,Ramaciotti Facility for Human Systems Biology, The University of Sydney and Centenary Institute, Sydney, NSW, Australia,Charles Perkins Centre, The University of Sydney, Australia,The University of Sydney Institute for Infectious Diseases, The University of Sydney, Sydney, NSW, Australia,The University of Sydney Nano Institute, the University of Sydney, Sydney, NSW, Australia,Correspondence to: Nicholas J.C. King, .
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Koutsakos M, Rowntree LC, Hensen L, Chua BY, van de Sandt CE, Habel JR, Zhang W, Jia X, Kedzierski L, Ashhurst TM, Putri GH, Marsh-Wakefield F, Read MN, Edwards DN, Clemens EB, Wong CY, Mordant FL, Juno JA, Amanat F, Audsley J, Holmes NE, Gordon CL, Smibert OC, Trubiano JA, Hughes CM, Catton M, Denholm JT, Tong SY, Doolan DL, Kotsimbos TC, Jackson DC, Krammer F, Godfrey DI, Chung AW, King NJ, Lewin SR, Wheatley AK, Kent SJ, Subbarao K, McMahon J, Thevarajan I, Nguyen TH, Cheng AC, Kedzierska K. Integrated immune dynamics define correlates of COVID-19 severity and antibody responses. Cell Rep Med 2021; 2:100208. [PMID: 33564749 PMCID: PMC7862905 DOI: 10.1016/j.xcrm.2021.100208] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/05/2020] [Accepted: 02/01/2021] [Indexed: 12/15/2022]
Abstract
SARS-CoV-2 causes a spectrum of COVID-19 disease, the immunological basis of which remains ill defined. We analyzed 85 SARS-CoV-2-infected individuals at acute and/or convalescent time points, up to 102 days after symptom onset, quantifying 184 immunological parameters. Acute COVID-19 presented with high levels of IL-6, IL-18, and IL-10 and broad activation marked by the upregulation of CD38 on innate and adaptive lymphocytes and myeloid cells. Importantly, activated CXCR3+cTFH1 cells in acute COVID-19 significantly correlate with and predict antibody levels and their avidity at convalescence as well as acute neutralization activity. Strikingly, intensive care unit (ICU) patients with severe COVID-19 display higher levels of soluble IL-6, IL-6R, and IL-18, and hyperactivation of innate, adaptive, and myeloid compartments than patients with moderate disease. Our analyses provide a comprehensive map of longitudinal immunological responses in COVID-19 patients and integrate key cellular pathways of complex immune networks underpinning severe COVID-19, providing important insights into potential biomarkers and immunotherapies. Analyses of 184 immune features define kinetics of immune responses to SARS-CoV-2 Circulating TFH1 cells in acute COVID-19 correlate with antibodies sIL-6R levels are elevated in severe COVID-19 but do not correlate with IL-6 Elevated IL-6 and IL-18 correlate with immune cell hyperactivation
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Affiliation(s)
- Marios Koutsakos
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Louise C. Rowntree
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Luca Hensen
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Brendon Y. Chua
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan
| | - Carolien E. van de Sandt
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Jennifer R. Habel
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Wuji Zhang
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Xiaoxiao Jia
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Lukasz Kedzierski
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Melbourne, VIC, Australia
| | - Thomas M. Ashhurst
- Sydney Cytometry Core Research Facility, Charles Perkins Centre, Centenary Institute and University of Sydney, Sydney, NSW, Australia
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, NSW, Australia
| | - Givanna H. Putri
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia
- School of Computer Science, University of Sydney, Sydney, NSW, Australia
| | - Felix Marsh-Wakefield
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia
- School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
- Vascular Immunology Unit, Discipline of Pathology, School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
| | - Mark N. Read
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia
- School of Computer Science, University of Sydney, Sydney, NSW, Australia
- The Westmead Initiative, University of Sydney, Sydney, NSW, Australia
| | - Davis N. Edwards
- School of Computer Science, University of Sydney, Sydney, NSW, Australia
- The Westmead Initiative, University of Sydney, Sydney, NSW, Australia
| | - E. Bridie Clemens
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Chinn Yi Wong
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Francesca L. Mordant
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Jennifer A. Juno
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Fatima Amanat
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029-6574, USA
| | - Jennifer Audsley
- Department of Infectious Diseases, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Natasha E. Holmes
- Department of Infectious Diseases, Austin Hospital, Heidelberg, VIC, Australia
- Department of Medicine and Radiology, University of Melbourne, Parkville, VIC, Australia
- Data Analytics Research and Evaluation (DARE) Centre, Austin Health and University of Melbourne, Heidelberg, VIC, Australia
- Centre for Antibiotic Allergy and Research, Department of Infectious Diseases, Austin Health, Heidelberg, VIC, Australia
| | - Claire L. Gordon
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Department of Infectious Diseases, Austin Hospital, Heidelberg, VIC, Australia
| | - Olivia C. Smibert
- Department of Infectious Diseases, Austin Hospital, Heidelberg, VIC, Australia
- Department of Infectious Diseases, Peter McCallum Cancer Centre, Melbourne, VIC, Australia
- National Centre for Infections in Cancer, Peter McCallum Cancer Centre, Melbourne, VIC, Australia
| | - Jason A. Trubiano
- Centre for Antibiotic Allergy and Research, Department of Infectious Diseases, Austin Health, Heidelberg, VIC, Australia
- Department of Infectious Diseases, Peter McCallum Cancer Centre, Melbourne, VIC, Australia
- National Centre for Infections in Cancer, Peter McCallum Cancer Centre, Melbourne, VIC, Australia
- Department of Medicine (Austin Health), University of Melbourne, Heidelberg, VIC, Australia
| | - Carly M. Hughes
- Monash Infectious Diseases, Monash Medical Centre, Monash Health, Melbourne, VIC, Australia
| | - Mike Catton
- Victorian Infectious Diseases Reference Laboratory, Royal Melbourne Hospital at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Justin T. Denholm
- Department of Infectious Diseases, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Victorian Infectious Diseases Services, Royal Melbourne Hospital and Doherty Department University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne VIC, Australia
| | - Steven Y.C. Tong
- Department of Infectious Diseases, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Victorian Infectious Diseases Services, Royal Melbourne Hospital and Doherty Department University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne VIC, Australia
- Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia
| | - Denise L. Doolan
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health & Medicine, James Cook University, Cairns, QLD, Australia
| | - Tom C. Kotsimbos
- Department of Medicine, Central Clinical School, Monash University, Melbourne, VIC, Australia
- Department of Allergy, Immunology, and Respiratory Medicine, Alfred Hospital, Melbourne, VIC, Australia
| | - David C. Jackson
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan
| | - Florian Krammer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Dale I. Godfrey
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Melbourne, VIC, Australia
| | - Amy W. Chung
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Nicholas J.C. King
- Sydney Cytometry Core Research Facility, Charles Perkins Centre, Centenary Institute and University of Sydney, Sydney, NSW, Australia
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, NSW, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia
- School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
- Viral Immunopathology Laboratory, Discipline of Pathology, School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
- Sydney Nano, University of Sydney, Sydney, NSW 2006, Australia
| | - Sharon R. Lewin
- Department of Infectious Diseases, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Victorian Infectious Diseases Services, Royal Melbourne Hospital and Doherty Department University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne VIC, Australia
- Department of Infectious Diseases, Monash University and Alfred Hospital, Melbourne, VIC, Australia
| | - Adam K. Wheatley
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of Melbourne, Melbourne, VIC, Australia
| | - Stephen J. Kent
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of Melbourne, Melbourne, VIC, Australia
- Melbourne Sexual Health Centre, Infectious Diseases Department, Alfred Health, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Kanta Subbarao
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- World Health Organization Collaborating Centre for Reference and Research on Influenza at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - James McMahon
- Monash Infectious Diseases, Monash Medical Centre, Monash Health, Melbourne, VIC, Australia
- Department of Infectious Diseases, Monash University and Alfred Hospital, Melbourne, VIC, Australia
| | - Irani Thevarajan
- Department of Infectious Diseases, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Victorian Infectious Diseases Services, Royal Melbourne Hospital and Doherty Department University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne VIC, Australia
| | - Thi H.O. Nguyen
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Allen C. Cheng
- School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia
- Infection Prevention and Healthcare Epidemiology Unit, Alfred Health, Melbourne, VIC, Australia
| | - Katherine Kedzierska
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan
- Corresponding author
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Mutso M, St John JA, Ling ZL, Burt FJ, Poo YS, Liu X, Žusinaite E, Grau GE, Hueston L, Merits A, King NJ, Ekberg JA, Mahalingam S. Basic insights into Zika virus infection of neuroglial and brain endothelial cells. J Gen Virol 2020; 101:622-634. [PMID: 32375993 PMCID: PMC7414445 DOI: 10.1099/jgv.0.001416] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 03/24/2020] [Indexed: 12/31/2022] Open
Abstract
Zika virus (ZIKV) has recently emerged as an important human pathogen due to the strong evidence that it causes disease of the central nervous system, particularly microcephaly and Guillain-Barré syndrome. The pathogenesis of disease, including mechanisms of neuroinvasion, may include both invasion via the blood-brain barrier and via peripheral (including cranial) nerves. Cellular responses to infection are also poorly understood. This study characterizes the in vitro infection of laboratory-adapted ZIKV African MR766 and two Asian strains of (1) brain endothelial cells (hCMEC/D3 cell line) and (2) olfactory ensheathing cells (OECs) (the neuroglia populating cranial nerve I and the olfactory bulb; both human and mouse OEC lines) in comparison to kidney epithelial cells (Vero cells, in which ZIKV infection is well characterized). Readouts included infection kinetics, intracellular virus localization, viral persistence and cytokine responses. Although not as high as in Vero cells, viral titres exceeded 104 plaque-forming units (p.f.u.) ml-1 in the endothelial/neuroglial cell types, except hOECs. Despite these substantial titres, a relatively small proportion of neuroglial cells were primarily infected. Immunolabelling of infected cells revealed localization of the ZIKV envelope and NS3 proteins in the cytoplasm; NS3 staining overlapped with that of dsRNA replication intermediate and the endoplasmic reticulum (ER). Infected OECs and endothelial cells produced high levels of pro-inflammatory chemokines. Nevertheless, ZIKV was also able to establish persistent infection in hOEC and hCMEC/D3 cells. Taken together, these results provide basic insights into ZIKV infection of endothelial and neuroglial cells and will form the basis for further study of ZIKV disease mechanisms.
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Affiliation(s)
- Margit Mutso
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
| | - James A. St John
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
- Griffith Institute for Drug Discovery, Griffith University, Nathan 4111, Queensland, Australia
- Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
| | - Zheng Lung Ling
- Discipline of Pathology, Bosch Institute, Marie Bashir Institute for Infectious diseases and Biosecurity, School of Medical Sciences, Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Felicity J. Burt
- National Health Laboratory Services, University of the Free State, Bloemfontein, South Africa
| | - Yee Suan Poo
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
- Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
| | - Xiang Liu
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
- Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
| | - Eva Žusinaite
- Institute of Technology, University of Tartu, Tartu, Estonia
| | - Georges E. Grau
- Vascular Immunology Unit, Discipline of Pathology, Sydney Medical School, University of Sydney, New South Wales 2050, Australia
| | - Linda Hueston
- Arbovirus Emerging Disease Unit, CIDMLS-ICPMR, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Andres Merits
- Institute of Technology, University of Tartu, Tartu, Estonia
| | - Nicholas J.C. King
- Discipline of Pathology, Bosch Institute, Marie Bashir Institute for Infectious diseases and Biosecurity, School of Medical Sciences, Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Jenny A.K. Ekberg
- Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
| | - Suresh Mahalingam
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
- Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Southport 4222, Queensland, Australia
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Freitag TL, Podojil JR, Pearson RM, Fokta FJ, Sahl C, Messing M, Andersson LC, Leskinen K, Saavalainen P, Hoover LI, Huang K, Phippard D, Maleki S, King NJ, Shea LD, Miller SD, Meri SK, Getts DR. Gliadin Nanoparticles Induce Immune Tolerance to Gliadin in Mouse Models of Celiac Disease. Gastroenterology 2020; 158:1667-1681.e12. [PMID: 32032584 PMCID: PMC7198359 DOI: 10.1053/j.gastro.2020.01.045] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 01/26/2020] [Accepted: 01/27/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Celiac disease could be treated, and potentially cured, by restoring T-cell tolerance to gliadin. We investigated the safety and efficacy of negatively charged 500-nm poly(lactide-co-glycolide) nanoparticles encapsulating gliadin protein (TIMP-GLIA) in 3 mouse models of celiac disease. Uptake of these nanoparticles by antigen-presenting cells was shown to induce immune tolerance in other animal models of autoimmune disease. METHODS We performed studies with C57BL/6; RAG1-/- (C57BL/6); and HLA-DQ8, huCD4 transgenic Ab0 NOD mice. Mice were given 1 or 2 tail-vein injections of TIMP-GLIA or control nanoparticles. Some mice were given intradermal injections of gliadin in complete Freund's adjuvant (immunization) or of soluble gliadin or ovalbumin (ear challenge). RAG-/- mice were given intraperitoneal injections of CD4+CD62L-CD44hi T cells from gliadin-immunized C57BL/6 mice and were fed with an AIN-76A-based diet containing wheat gluten (oral challenge) or without gluten. Spleen or lymph node cells were analyzed in proliferation and cytokine secretion assays or by flow cytometry, RNA sequencing, or real-time quantitative polymerase chain reaction. Serum samples were analyzed by gliadin antibody enzyme-linked immunosorbent assay, and intestinal tissues were analyzed by histology. Human peripheral blood mononuclear cells, or immature dendritic cells derived from human peripheral blood mononuclear cells, were cultured in medium containing TIMP-GLIA, anti-CD3 antibody, or lipopolysaccharide (controls) and analyzed in proliferation and cytokine secretion assays or by flow cytometry. Whole blood or plasma from healthy volunteers was incubated with TIMP-GLIA, and hemolysis, platelet activation and aggregation, and complement activation or coagulation were analyzed. RESULTS TIMP-GLIA did not increase markers of maturation on cultured human dendritic cells or induce activation of T cells from patients with active or treated celiac disease. In the delayed-type hypersensitivity (model 1), the HLA-DQ8 transgenic (model 2), and the gliadin memory T-cell enteropathy (model 3) models of celiac disease, intravenous injections of TIMP-GLIA significantly decreased gliadin-specific T-cell proliferation (in models 1 and 2), inflammatory cytokine secretion (in models 1, 2, and 3), circulating gliadin-specific IgG/IgG2c (in models 1 and 2), ear swelling (in model 1), gluten-dependent enteropathy (in model 3), and body weight loss (in model 3). In model 1, the effects were shown to be dose dependent. Splenocytes from HLA-DQ8 transgenic mice given TIMP-GLIA nanoparticles, but not control nanoparticles, had increased levels of FOXP3 and gene expression signatures associated with tolerance induction. CONCLUSIONS In mice with gliadin sensitivity, injection of TIMP-GLIA nanoparticles induced unresponsiveness to gliadin and reduced markers of inflammation and enteropathy. This strategy might be developed for the treatment of celiac disease.
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Affiliation(s)
- Tobias L. Freitag
- Department of Bacteriology and Immunology, University of Helsinki, Finland;,Translational Immunology Research Program, University of Helsinki, Finland;,Corresponding author. Address Correspondence to: Tobias L. Freitag, MD, Translational Immunology Research Program, Department of Bacteriology and Immunology, Haartmaninkatu 3, Room B327, 00290 University of Helsinki, Finland,
| | - Joseph R. Podojil
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA;,Cour Pharmaceutical Development Company, Northbrook, IL, USA
| | - Ryan M. Pearson
- Cour Pharmaceutical Development Company, Northbrook, IL, USA,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Frank J. Fokta
- Cour Pharmaceutical Development Company, Northbrook, IL, USA
| | - Cecilia Sahl
- Department of Bacteriology and Immunology, University of Helsinki, Finland
| | - Marcel Messing
- Department of Bacteriology and Immunology, University of Helsinki, Finland;,Translational Immunology Research Program, University of Helsinki, Finland
| | | | - Katarzyna Leskinen
- Translational Immunology Research Program, University of Helsinki, Finland
| | - Päivi Saavalainen
- Translational Immunology Research Program, University of Helsinki, Finland
| | | | | | | | - Sanaz Maleki
- Discipline of Pathology, School of Medical Sciences, Bosch Institute, Sydney Medical School, The University of Sydney, Sydney, Australia
| | - Nicholas J.C. King
- Discipline of Pathology, School of Medical Sciences, Bosch Institute, Sydney Medical School, The University of Sydney, Sydney, Australia
| | - Lonnie D. Shea
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Stephen D. Miller
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA;,Interdepartmental Immunobiology Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Seppo K. Meri
- Department of Bacteriology and Immunology, University of Helsinki, Finland;,Translational Immunology Research Program, University of Helsinki, Finland
| | - Daniel R. Getts
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA;,Cour Pharmaceutical Development Company, Northbrook, IL, USA,Discipline of Pathology, School of Medical Sciences, Bosch Institute, Sydney Medical School, The University of Sydney, Sydney, Australia;,Interdepartmental Immunobiology Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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Azardaryany MK, Yeung AW, Asshurst T, Thomas SR, King NJ. 11. Cytokine 2013. [DOI: 10.1016/j.cyto.2013.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Xie RD, Villacampa N, Minten C, Terry R, King NJ, Almolda B, González B, Castellano B, Campbell IL. 285. Cytokine 2013. [DOI: 10.1016/j.cyto.2013.06.288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hudson JA, Billington C, Cornelius AJ, Wilson T, On SLW, Premaratne A, King NJ. Use of a bacteriophage to inactivate Escherichia coli O157:H7 on beef. Food Microbiol 2013; 36:14-21. [PMID: 23764215 DOI: 10.1016/j.fm.2013.03.006] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 03/21/2013] [Accepted: 03/24/2013] [Indexed: 11/29/2022]
Abstract
A number of outbreaks of Escherichia coli O157:H7 infections involving beef have been reported. Options for controlling bacterial pathogens in raw foods are limited, but one is to use bacteriophages (phages). We describe the isolation and characterisation of phage FAHEc1, which infects E. coli O157, and its ability to kill its host in vitro and on beef. The phage belonged to the family Myoviridae and lysed 28 of 30 E. coli O157 (:H7, :HNM and :H not specified) isolates, only one other non-O157 E. coli serotype (O162:H7), and none of the other 13 bacterial species tested. The phage did not contain stx1, stx2, eae or ehxA virulence genes as assessed by PCR. An approximate 4 log₁₀ inactivation of E. coli O157:H7 occurred at 5 °C in the presence of phage FAHEc1 at >10⁷ PFU/ml in broth in vitro. On thinly sliced beef pieces incubated at 37 °C, a > 2.7 log₁₀ reduction occurred with 3.2 × 10⁷ PFU/4 cm² meat piece. At lower phage concentrations (10³-10⁴ PFU/4 cm² piece) phage replication occurred on beef at 37 °C. When the phage was applied to beef pieces under conditions simulating hot boning and conventional carcass cooling, inactivation of E. coli O157:H7 of approximately 2 log₁₀ was measured under optimal conditions with phages applied at 3.2 × 10⁷ PFU/4 cm² meat piece.
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Affiliation(s)
- J A Hudson
- Food Safety Programme, ESR Ltd, Christchurch Science Centre, PO Box 29-181, Ilam, Christchurch 8540, New Zealand.
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Hofer MJ, Manders P, Lim SL, Terry RL, Getts MT, Getts DR, King NJ, Campbell IL. Lethal viral infection results from STAT1 but not STAT2 or IRF9 deficiency in mice and is mediated by CD4+ T-cells. Cytokine 2009. [DOI: 10.1016/j.cyto.2009.07.348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Campbell IL, Mueller M, Carter S, Getts DR, King NJ. Complex roles of the CXCR3 chemokines in immune-mediated neurological disease (96.1). The Journal of Immunology 2007. [DOI: 10.4049/jimmunol.178.supp.96.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
The chemokine receptor CXCR3 binds CXCL9, CXCL10 and CXCL11 and promotes the trafficking of activated T-cells. Although these chemokines are highly elevated in the CNS in MS and the animal model, experimental autoimmune encephalomyelitis (EAE), their role is unknown. Here we show that while IFN-γ is the principal mediator of CXCR3 ligand gene expression in the CNS in EAE, the cellular localization of the individual chemokine genes is divergent suggesting functional specialisation of the CXCR3 ligand chemokines. Transgenic mice (GF-) were generated with astrocyte-production of CXCL9, CXCL10 or CXCL11. These mice do not develop neurological disease. In GF-CXCL10 and -CXCL11 mice, modest non-reactive leukocytic infiltrates were seen in the CNS. Thus, these chemokines when produced chronically are a poor stimulus for the CNS recruitment and activation of T-cells. The role of CXCR3 signaling in MOG-induced EAE was examined in CXCR3 KO mice and in GF-CXCL9, -CXCL10 or -CXCL11 mice. CXCR3 KO, GF-CXCL9 and -CXCL11 mice had more severe EAE with widely disseminated demyelinating lesions throughout the CNS. In CXCR3 KO mice with EAE the number of suppressor Treg cells in the brain was reduced. Thus, in EAE, CXCR3 chemokine ligands:have non-redundant functions,are not involved in the initial recruitment of effector T-cells to the CNS, andretain T-cells to the perivascular space and foster Treg cell interactions thereby limiting lesion spread and tissue destruction.
Support: NIH NS044905.
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Affiliation(s)
| | | | | | - Daniel R. Getts
- 2Department of Pathology, University of Sydney, Building G08, Sydney, 2006, Australia
| | - Nicholas J.C. King
- 2Department of Pathology, University of Sydney, Building G08, Sydney, 2006, Australia
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10
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Abstract
The Fear Survey Schedule for Children-Revised (FSSC-R) is a widely used self-report questionnaire that purports to measure the number of fears and the overall level of fearfulness in children. A number of studies have shown that the ten most common childhood fears can be found on the Danger and Death subscale of the FSSC-R, with upwards of 50% of children endorsing such fears. However, some researchers (e.g., H. McCathie & S.H. Spence, 1991; Behaviour Research and Therapy, 29, 495-502) have questioned the validity of these findings, suggesting that these items do not reflect actual childhood fears that children have or experience on a daily or regular basis. Rather, they suggest that children are responding to these fear items as if they were actually occurring to them in the here and now. The current study examined the occurrence of five Danger and Death fears from the FSSC-R (i.e., "Not being able to breathe", "Being hit by a car or truck", "Falling from high places", "Bombing attacks or being invaded", and "Fire or getting burned") in a sample of normal school children aged eight to 12 years (N=102). More specifically, we used three different methods to asses these fears: (1). prevalence as determined by the standard FSSC-R procedure, (2). prevalence as determined by a fear list procedure, and (3). actual occurrence or prevalence of these fears in the past week, as determined by a diary method. Results indicated that while these fears ranked high when using the standard FSSC-R procedure, they were considerably less common when using the fear list procedure, and had a low probability of actual occurrence on a daily basis, as well as possessing a short duration and low intensity. Implications for the assessment of fears and the use of self-report measures like the FSSC-R are briefly discussed.
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Affiliation(s)
- P Muris
- Department of Medical, Clinical, and Experimental Psychology, Maastricht University, PO Box 616, 6200 MD, Maastricht, The Netherlands.
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11
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Abstract
School refusal is differentiated from other attendance problems such as truancy and school withdrawal. It is characterised by the child's emotional upset at the prospect of going to school, parental awareness of and antipathy toward the problem, and an absence of significant antisocial behaviour in the child. The child's emotional upset is frequently associated with an anxiety disorder, but it may also be associated with a mood disorder. School refusal affects approximately 1% of school children across the primary and secondary school levels. Severe and prolonged school refusal jeopardises the young person's social, emotional and academic development, and may be associated with mental health problems in adulthood. A first step in management involves efficient identification and the assessment of contributing and maintaining factors. Clinical outcome studies support the efficacy of cognitive behavioural therapy (CBT). The psychosocial approach encompassed in CBT incorporates anxiety management training with the young person, behaviour management training with parents and consultation with school personnel. Pharmacological treatments are commonly employed although empirical support for their use is limited. Tricyclic antidepressants and selective serotonin (5-hydroxytryptamine; 5-HT) reuptake inhibitors are the more commonly used agents, with the latter having fewer associated adverse effects. It is suggested that the first line of treatment should be CBT, with simultaneous or subsequent pharmacological treatment contingent upon the response to CBT.
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Affiliation(s)
- D Heyne
- Victorian Child Psychiatry Training Department, Faculty of Medicine, Dentistry, & Health Sciences, University of Melbourne, Australia.
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12
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Delikatny EJ, van Holst Pellekaan CJ, King NJ. Autologous lymphocyte-monocyte co-culture increases NMR-visible and cytoplasmic lipids in the absence of increased markers of lymphocyte activation. Biochim Biophys Acta 2001; 1533:243-54. [PMID: 11731334 DOI: 10.1016/s1388-1981(01)00157-3] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Alterations in nuclear magnetic resonance (NMR)-visible lipid, morphometric lipid volume fraction, distribution of subcellular lipid droplets and activation antigen expression were examined in human peripheral blood lymphocytes, activated using phorbol myristate acetate (PMA) and ionomycin or by co-culture with autologous monocytes. PMA/Ionomycin treatment caused significant time-dependent increases in mobile lipid and in oil red O-positive lipid droplets that were accompanied by lymphocyte proliferation and increases in activation antigens, CD25, CD69 and CD71. Co-culture of lymphocytes and monocytes also induced significant increases in NMR-visible lipid signals and cytoplasmic lipid droplets, but in contrast, no correspondent increases in activation antigens were observed. Strong correlations were observed between the intensity of the NMR signal and the percentage of total cells containing lipid droplets (r=0.95) and the morphometric lymphocyte lipid volume fraction (r=0.80), indicating that the droplets were the source of the mobile lipid signal. Lipid droplets in PMA/Ionomycin-treated cells were evenly distributed throughout the population, but in co-cultures, only lymphocytes in close proximity to monocytes with lipid droplets contained oil red O-positive lipid. This data shows that the NMR-visible mobile lipid signal observed in lymphocytes co-cultured with monocytes is not directly dependent on either proliferation or the upregulation of activation antigens, similar to the previously observed response of T cells exposed to antibodies to the T cell receptor.
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Affiliation(s)
- E J Delikatny
- Department of Cancer Medicine, The University of Sydney, Australia.
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13
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Kesson AM, King NJ. Transcriptional regulation of major histocompatibility complex class I by flavivirus West Nile is dependent on NF-kappaB activation. J Infect Dis 2001; 184:947-54. [PMID: 11574908 DOI: 10.1086/323603] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2001] [Revised: 05/10/2001] [Indexed: 11/03/2022] Open
Abstract
Infection by the flavivirus West Nile (WNV) is associated with a virus-specific increase of major histocompatibility complex class I (MHC-I) molecules on the cell surface of diploid vertebrate cells. The increased MHC-I cell surface expression is functional and is associated with increased susceptibility to secondary WNV-immune and alloimmune cytotoxic T cells. WNV-induced up-regulation of cell surface MHC-I expression is associated with NF-kappaB activation and increased transcription of MHC-I mRNA. WNV infection increases luciferase activity of RAWa4 long terminal repeat (LTR) cells, which are transfected stably with a plasmid containing 2 NF-kappaB binding sites, the human immunodeficiency virus LTR linked to a luciferase reporter gene. The NF-kappaB-induced complexes are a p50/p65 heterodimer and another faster migrating species containing p50 homodimers. WNV-induced activation of NF-kappaB and the up-regulation of MHC-I were blocked by the protein kinase C inhibitor H-7 and salicylate, both of which block phosphorylation of inhibitor kappaB.
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Affiliation(s)
- A M Kesson
- Department of Virology and Microbiology, Children's Hospital at Westmead, Westmead, Australia.
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14
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Byrne SN, Halliday GM, Johnston LJ, King NJ. Interleukin-1beta but not tumor necrosis factor is involved in West Nile virus-induced Langerhans cell migration from the skin in C57BL/6 mice. J Invest Dermatol 2001; 117:702-9. [PMID: 11564180 DOI: 10.1046/j.0022-202x.2001.01454.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [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: 11/20/2022]
Abstract
Langerhans cells are bone marrow-derived epidermal dendritic cells. They migrate out of the epidermis into the lymphatics and travel to the draining lymph nodes where they are responsible for the activation of T cells in the primary immune response. Tumor necrosis factor and interleukin-1beta, have previously been shown to be responsible for Langerhans cell migration in response to contact sensitizers in BALB/C mice; however, which cytokines are responsible for mediating Langerhans cell migration in response to a replicating cutaneously acquired virus such as the West Nile Virus, are not known. We have devised a method for identifying Langerhans cells in the draining lymph nodes using E-cadherin labeling and flow cytometry. We infected tumor necrosis factor-deficient gene knockout mice (tumor necrosis factor-/-) intradermally with West Nile Virus and found that levels of Langerhans cell emigration and accumulation in the draining lymph nodes were similar to wild-type C57BL/6 mice. This was borne out by the finding that high levels of systemic neutralizing anti-tumor necrosis factor antibody failed to inhibit the migration of Langerhans cells from the epidermis and their accumulation in the draining lymph nodes in wild-type C57BL/6 mice. In West Nile Virus-infected, tumor necrosis factor-/- mice treated with systemic neutralizing anti-interleukin-1beta antibodies, however, migration of Langerhans cells from the epidermis and their accumulation in the draining lymph nodes were significantly inhibited compared with control antibody-treated, infected animals. The results indicate that Langerhans cell migration, accumulation in the draining lymph nodes and the initiation of lymph node shut-down in response to a cutaneous West Nile Virus infection is dependent on interleukin-1beta and can occur in the absence of tumor necrosis factor.
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Affiliation(s)
- S N Byrne
- Department of Pathology, University of Sydney, Sydney, New South Wales, Australia
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15
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Karupiah G, Hunt NH, King NJ, Chaudhri G. NADPH oxidase, Nramp1 and nitric oxide synthase 2 in the host antimicrobial response. Rev Immunogenet 2001; 2:387-415. [PMID: 11256747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Using highly conserved, complex enzyme systems, leukocytes utilize the toxic nature of free radical intermediates, derived from oxygen and nitrogen, to control microbial pathogens as part of the innate immune response. Upon activation, NADPH oxidase generates superoxide anion radicals, which in turn give rise to further reactive oxygen intermediates. Similarly, activated nitric oxide synthase 2 catalyses the production of nitric oxide radicals, which leads to the formation of reactive nitrogen intermediates. Nitrogen- and oxygen-centered reactive intermediates can interact to form further reactive species. In addition, presence of the cationic transporter, Nrampl, may exacerbate the effects of these toxic compounds on invading microbes. While each of these antimicrobial systems can operate independently, the combination of their activities is synergistic in the successful containment of almost all invading pathogens. These systems are activated and modulated by microbial products and a series of temporally expressed cytokines. They also feed directly into the initiation of the adaptive immune response, which culminates in lasting specific immunity. The effector molecules, generated in the early innate immune response, are not specific to the invading pathogen and may also cause damage to the host. It is the critical balance of these processes in the initial stages of infection that determines the outcome of infectious disease.
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Affiliation(s)
- G Karupiah
- Department of Pathology, Faculty of Medicine, University of Sydney, Australia.
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16
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Abstract
Anxiety may be more transient in children and adolescents than in adults. The present study involves a longitudinal design enabling the investigation of the continuity/discontinuity of self-reported anxiety in children and adolescents. A sample of 68 children was followed over 3 years. Results indicate that, on the whole, self-reported anxiety decreased over time. This was true for overall anxiety and its sub-types, with the exception of social concerns/concentration, which did not decrease over time. Consistent with past research involving normal fear, girls and younger children were found to score higher on anxiety than boys and older children did. However, those groups scoring higher at inception also demonstrated the most marked decreases over the 3-year period. In addition to the changes found over time, the data indicated continuity in anxiety such that levels of anxiety at inception were significant predictors of follow-up anxiety, although only a small amount of variance was shared. The authors concluded that adult models of anxiety cannot be applied to youth and that future research should investigate the contribution of contextual factors to the development of anxiety in children.
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Affiliation(s)
- E Gullone
- Department of Psychology, Monash University, Australia
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17
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Affiliation(s)
- N J King
- Department of Pathology, University of Sydney, New South Wales, Australia
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18
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Abstract
OBJECTIVE To critically review the past 10 years of research on school refusal in children and adolescents. METHOD Literature on school refusal published from 1990 onward was reviewed following a systematic search of PsycINFO. The review focuses on definitional issues, epidemiology and school refusal identification, diagnostic considerations, family functioning, assessment, treatment, and follow-up studies. RESULTS While definitional and conceptual issues are still evident, promising developments have occurred in relation to assessment and treatment practices and understanding of the family context of school refusal. CONCLUSIONS From a clinical viewpoint, school refusal cases require comprehensive assessment and treatment. Advances have been made in the treatment of school refusal. However, additional controlled studies evaluating interventions for school refusal are needed.
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Affiliation(s)
- N J King
- Faculty of Education, Monash University, Victoria, Australia. neville.king@education
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19
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Muris P, Merckelbach H, Ollendick TH, King NJ, Bogie N. Children's nighttime fears: parent-child ratings of frequency, content, origins, coping behaviors and severity. Behav Res Ther 2001; 39:13-28. [PMID: 11125721 DOI: 10.1016/s0005-7967(99)00155-2] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.0] [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: 02/04/2023]
Abstract
The present study investigated nighttime fears in normal school children aged 4 to 12 yr (N=176). Children and their parents were interviewed about the frequency, content, origins, coping behaviors and severity of children's nighttime fears. Results showed that 73.3% of the children reported nighttime fears, indicating that these fears are quite prevalent. Inspection of the developmental course of nighttime fears revealed that these fears are common among 4- to 6-year-olds, become even more frequent in 7- to 9-year-olds and then remain relatively stable in 10- to 12-year-olds. Inspection of the origins of nighttime fears revealed that most of the children (i.e., almost 80%) attributed their fear to negative information; conditioning and modeling were endorsed less frequently (25.6% and 13.2%, respectively). A substantial percentage of the children (24.0%) indicated that learning experiences had not played a role in the acquisition of their nighttime fears. Children reported a variety of coping strategies in order to deal with their nighttime fears and generally rated these strategies as helpful in reducing anxiety. Furthermore, children's nighttime fears were associated with moderate levels of anxiety. Moreover, in about 10% of the children, nighttime fears were related to one or more DSM-III-R anxiety disorders. Finally, parental reports of children's nighttime fears substantially deviated from children's reports. Most importantly, parents provided a marked underestimation of the frequency of nighttime fears, at least as reported by their children.
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Affiliation(s)
- P Muris
- Department of Psychology, Maastricht University, Netherlands.
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20
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Abstract
Intracellular reactive oxygen species (ROS) production by activated murine T lymphocytes was investigated by analyzing intracellular dichlorofluorescin (DCFH(2)) oxidation in lymph node cells (LNC). An increase in DCFH(2) oxidation in LNC induced by phorbol myristate acetate (PMA) was detected by flow cytometry. It was confirmed that this increase was present in Thy1(+) LNC. We examined the contribution to intracellular DCFH(2) oxidation of ROS released by leukocytes other than T cells present in the LNC suspension. Superoxide dismutase, catalase, and glutathione/glutathione peroxidase inhibited the PMA-induced increase in intracellular DCFH(2) oxidation. Furthermore, PMA failed to elicit DCFH(2) oxidation in LNC isolated from mice lacking a functional NADPH oxidase (gp91(phox) gene knockout mice), but this response could be restored in these cells by the addition of T cell-depleted LNC from wild-type litter mates. This study highlights the necessity for caution in using the DCFH(2) assay to demonstrate specific intracellular ROS production in heterogeneous cell populations. It also suggests that cells other than T cells in lymph node populations may, through production of ROS, influence the intracellular redox state of T lymphocytes.
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Affiliation(s)
- D M van Reyk
- Department of Pathology, University of Sydney, Sydney, Australia.
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21
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King NJ, Tonge BJ, Mullen P, Myerson N, Heyne D, Rollings S, Martin R, Ollendick TH. Treating sexually abused children with posttraumatic stress symptoms: a randomized clinical trial. J Am Acad Child Adolesc Psychiatry 2000; 39:1347-55. [PMID: 11068889 DOI: 10.1097/00004583-200011000-00008] [Citation(s) in RCA: 182] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate the efficacy of child and caregiver participation in the cognitive-behavioral treatment of sexually abused children with posttraumatic stress symptoms. METHOD Thirty-six sexually abused children (aged 5-17 years) were randomly assigned to a child-alone cognitive-behavioral treatment condition, a family cognitive-behavioral treatment condition, or a waiting-list control condition. RESULTS Compared with controls, children who received treatment exhibited significant improvements in posttraumatic stress disorder symptoms and self-reports of fear and anxiety. Significant improvements also occurred in relation to parent-completed measures and clinician ratings of global functioning. In general, parental involvement did not improve the efficacy of cognitive-behavioral therapy. Maintenance of improvement was evident at a 12-week follow-up assessment. CONCLUSIONS Cognitive-behavioral treatment was useful, but further research is required on caregiver involvement.
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Affiliation(s)
- N J King
- Faculty of Education, Monash University, Victoria, Australia.
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22
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Yin J, McLachlan C, Chaufour X, McGuire MA, White G, Turner V, King NJ, Hambly BD. Growth arrest-specific gene 6 expression in proliferating rabbit vascular smooth muscle cells in vitro and in vivo. Electrophoresis 2000; 21:3851-6. [PMID: 11271503 DOI: 10.1002/1522-2683(200011)21:17<3851::aid-elps3851>3.0.co;2-q] [Citation(s) in RCA: 10] [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: 11/10/2022]
Abstract
Proliferation and migration of vascular smooth muscle cells (VSMCs) are involved in the processes of atherosclerosis and restenosis. The protein product of the growth arrest-specific gene 6 (Gas-6) has recently been identified as a ligand for the Axl/Rse/Mer tyrosine kinase receptor family, which may be involved in proliferation and migration of VSMCs. Here we show that Gas-6 gene expression is increased in proliferating VSMCs in tissue culture (2.5-fold increase by Northern blot) and following neointimal proliferation in a rabbit balloon-injury model (3-fold increase by Western blot). Neither platelet-derived growth factor (PDGF) nor thrombin stimulate the expression of Gas-6 in cultured VSMCs despite the ability of the PDGF, but not thrombin, to stimulate proliferation in growth-arrested cells. These data suggest a role for the Gas-6 regulatory system in VSMC proliferation, which may be a target for therapeutic interventions in the atherosclerotic process and restenosis after angioplasty.
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Affiliation(s)
- J Yin
- Department of Pathology, University of Sydney, Australia
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23
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Penfold PL, Wen L, Madigan MC, Gillies MC, King NJ, Provis JM. Triamcinolone acetonide modulates permeability and intercellular adhesion molecule-1 (ICAM-1) expression of the ECV304 cell line: implications for macular degeneration. Clin Exp Immunol 2000; 121:458-65. [PMID: 10971511 PMCID: PMC1905725 DOI: 10.1046/j.1365-2249.2000.01316.x] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Whilst animal studies and a pilot clinical trial suggest that intravitreal triamcinolone acetonide (TA) may be useful in the treatment of age-related macular degeneration (AMD), its mode of action remains to be fully elucidated. The present study has investigated the capacity of TA to modulate the expression of adhesion molecules and permeability using a human epithelial cell line (ECV304) as a model of the outer blood-retinal barrier (BRB). The influence of TA on the expression of ICAM-1 and MHC-I was studied on resting and phorbol myristate acetate (PMA)- or interferon-gamma (IFN-gamma)- and/or tumour necrosis factor-alpha (TNF-alpha)-activated cells using flow cytometry and immunocytochemistry. Additionally, ECV304 cells were grown to confluence in uncoated Transwell chambers; transepithelial resistance (TER) across resting and PMA-activated cells was monitored. TA significantly decreased the paracellular permeability of ECV304 cells and down-regulated ICAM-1 expression, consistent with immunocytochemical observations. PMA-induced permeability changes were dose-dependent and TA decreased permeability of both resting and PMA-activated monolayers. MHC-I expression by ECV304 cells however, was not significantly affected by TA treatment. The modulation of TER and ICAM-1 expression in vitro correlate with clinical observations, suggesting re-establishment of the BRB and down-regulation of inflammatory markers are the principal effects of intravitreal TA in vivo. The results further indicate that TA has the potential to influence cellular permeability, including the barrier function of the retinal pigment epithelium (RPE) in AMD-affected retinae.
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Affiliation(s)
- P L Penfold
- Department of Clinical Ophthalmology, University of Sydney, Sydney, Australia.
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24
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Kunzelmann K, Beesley AH, King NJ, Karupiah G, Young JA, Cook DI. Influenza virus inhibits amiloride-sensitive Na+ channels in respiratory epithelia. Proc Natl Acad Sci U S A 2000; 97:10282-7. [PMID: 10920189 PMCID: PMC27875 DOI: 10.1073/pnas.160041997] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Many pathogens causing diarrhea do so by modulating ion transport in the gut. Respiratory pathogens are similarly associated with disturbances of fluid balance in the respiratory tract, although it is not known whether they too act by altering epithelial ion transport. Here we show that influenza virus A/PR/8/34 inhibits the amiloride-sensitive Na(+) current across mouse tracheal epithelium with a half-time of about 60 min. We further show that the inhibitory effect of the influenza virus is caused by the binding of viral hemagglutinin to a cell-surface receptor, which then activates phospholipase C and protein kinase C. Given the importance of epithelial Na(+) channels in controlling the amount of fluid in the respiratory tract, we suggest that down-regulation of Na(+) channels induced by influenza virus may play a role in the fluid transport abnormalities that are associated with influenza infections.
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Affiliation(s)
- K Kunzelmann
- Departments of Physiology and Pathology, and Medical Foundation of the University of Sydney, University of Sydney, New South Wales 2006, Australia
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25
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Abstract
Whereas there has been recent interest in interactions between dendritic cells and pathogenic viruses, the role of dendritic cells in the initiation of protective immunity to such organisms has not been elucidated. The aim of this study was to examine whether a resident dendritic cell population in the skin, Langerhans cells, respond to cutaneous viral infections which are effectively cleared by the immune system. We therefore characterized the ability of Langerhans cells to migrate to local draining lymph nodes following infection with the arthropod-borne viruses, West Nile virus or Semliki Forest virus. The data show that major histocompatibility complex class II+/NLDC145+/E-cadherin+ Langerhans cell numbers are increased in the draining lymph nodes of infected mice and this increase is accompanied by a concomitant decrease in the Langerhans cell density in the epidermis. Langerhans cell migration is associated with an accumulation of leukocytes in the lymph node, which is one of the earliest events in the initiation of an immune response. Both the migratory response and the draining lymph node leukocyte accumulation were abrogated if ultraviolet-inactivated instead of live viruses were used, suggesting the activation and subsequent migration of Langerhans cells requires a live, replicating antigen. Our findings are likely to have wider implications for the development of epidermally delivered vaccines and suggest that mobilization of dendritic cells may be involved in the development of immune responses to arthropod-borne viruses.
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Affiliation(s)
- L J Johnston
- Departments of Pathology and Medicine, University of Sydney, Sydney, New South Wales, Australia
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26
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Abstract
In recent years, there has been a significant upsurge in the application of flow cytometry to plant cells and plant cell cultures. As well as a range of uses in plant biology, flow cytometry offers many advantages for monitoring plant cell cultures used in large-scale bioprocessing operations. This review summarizes the current status of the field, concentrating on methods for DNA measurement and multiparameter cell cycle analysis. Techniques for screening and selection of elite cell lines with high productivity of secondary metabolites are also addressed.
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Affiliation(s)
- W Yanpaisan
- Department of Biotechnology, University of New South Wales, Sydney NSW 2052, Australia
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27
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Abstract
Flow cytometry was used to measure cell cycle parameters in Solanum aviculare plant cell suspensions. Methods for bromodeoxyuridine (BrdU) labeling of plant nuclei were developed so that cell cycle times and the proportion of cells participating in growth could be determined as a function of culture time and conditions. The percentage of cells active in the cell cycle at 25 degrees C decreased from 52% to 19% within 7.6 d of culture; presence of a relatively large proportion of non-active cells was reflected in the results for culture growth. While the maximum specific growth rate of the suspensions at 25 degrees C was 0.34 d-1 (doubling time: 2.0 d), the specific growth rate of active cells was significantly greater at 0.67 d-1, corresponding to a cell cycle time of 1.0 d. A simple model of culture growth based on exponential and linear growth kinetics and the assumption of constant cell cycle time was found to predict with reasonable accuracy the proportion of active cells in the population as a function of time. Reducing the temperature to 17 degrees C lowered the culture growth rate but prolonged the exponential growth phase compared with 25 degrees C; the percentage of cells participating in the cell cycle was also higher. Exposure of plant cells to different agitation intensities in shake flasks had a pronounced effect on the distribution of cells within the cell cycle. The proportion of cells in S phase was 1.8 times higher at a shaker speed of 160 rpm than at 100 rpm, while the frequency of G0 + G1 cells decreased by up to 27%. Because of the significant levels of intraculture heterogeneity in suspended plant cell systems, flow cytometry is of particular value in characterizing culture properties and behavior.
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Affiliation(s)
- W Yanpaisan
- Department of Biotechnology, University of New South Wales, Sydney NSW 2052, Australia
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28
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Abstract
Reviews the empirically supported status of behavioral and cognitive-behavioral interventions in the treatment of childhood phobias and anxiety disorders. For childhood phobias, it is concluded that imaginal desensitization, in vivo desensitization, filmed modeling, live modeling, and cognitive-behavioral interventions that use self-instruction training are probably efficacious and that participant modeling and reinforced practice are well established. For anxiety disorders, only cognitive-behavioral procedures with and without family anxiety management (FAM) were found to be probably efficacious. However, much of the support for these procedures comes from analogue studies conducted in research laboratory or school settings, delivered in small-group format and, not infrequently, with nonclinically referred children. Additional research that examines high-strength interventions with clinic-referred children is recommended. Furthermore, research that examines the pathological processes involved in the onset and maintenance of phobic and anxiety disorders as well as the change processes used to treat these disorders is called for.
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Affiliation(s)
- T H Ollendick
- Department of Psychology, Virginia Polytechnic Institute and State University, Blacksburg 24061-0355, USA.
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29
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Cooper B, Chebib M, Shen J, King NJ, Darvey IG, Kuchel PW, Rothstein JD, Balcar VJ. Structural selectivity and molecular nature of L-glutamate transport in cultured human fibroblasts. Arch Biochem Biophys 1998; 353:356-64. [PMID: 9606970 DOI: 10.1006/abbi.1998.0626] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [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: 12/22/2022]
Abstract
Uptake of L-[3H]glutamate by monolayers of fibroblasts cultured from human embryonic skin has been studied in the presence of several nonradioactive structural analogs of glutamate and aspartate. Results have suggested that the structural specificites of glutamate transporters in cultured human fibroblasts are similar to those of glutamate transporters in the mammalian brain. Only subtle differences have been detected: in the mammalian cerebral cortex, enantiomers of threo-3-hydroxyaspartate are almost equipotent as inhibitors of L-[3H]glutamate uptake while, in human fibroblasts, the D-isomer has been found to be an order of magnitude less potent than the corresponding L-isomer. Kinetic analysis of a model in which substrates are recognized by the glutamate transporter binding site(s) as both alpha- and beta-amino acids indicated that such a mechanism cannot explain the apparent negative cooperativity characterizing the effects of D- and L-aspartate. Molecular modeling has been used to estimate the optimum conformation of L-glutamate as it interacts with the transporter(s). Flow cytometry has indicated that all fibroblasts in culture express at least moderate levels of four glutamate transporters cloned from human brain. Small subpopulations (< 3%) of cells, however, were strongly labeled with antibodies against EAAT1 (GLAST) and EAAT2 (GLT-1) transporters. We conclude that these two transporters--known to be strongly expressed in brain tissue--can be principally responsible for the "high affinity" transport of glutamate also in nonneural cells.
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Affiliation(s)
- B Cooper
- Department of Anatomy and Histology, University of Sydney, NSW, Australia
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King NJ, Tonge BJ, Heyne D, Pritchard M, Rollings S, Young D, Myerson N, Ollendick TH. Cognitive-behavioral treatment of school-refusing children: a controlled evaluation. J Am Acad Child Adolesc Psychiatry 1998; 37:395-403. [PMID: 9549960 DOI: 10.1097/00004583-199804000-00017] [Citation(s) in RCA: 199] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To evaluate the efficacy of a 4-week cognitive-behavioral treatment program for children who refuse to go to school. METHOD Thirty-four school-refusing children (aged 5 to 15 years) were randomly assigned to a cognitive-behavioral treatment condition or a waiting-list control condition. Treatment consisted of individual child cognitive-behavioral therapy plus parent/teacher training in child behavior management skills. Measures taken before and after treatment included school attendance, child self-report of emotional distress and coping, caregiver reports on emotional and behavioral problems, and clinician ratings of global functioning. RESULTS Relative to waiting-list controls, children who received cognitive-behavioral therapy exhibited a significant improvement in school attendance. These children also improved on self-reports of fear, anxiety, depression, and coping. Significant improvements also occurred in relation to caregiver reports and clinician ratings. Maintenance of therapeutic gains was demonstrated at a 3-month follow-up assessment. CONCLUSIONS Cognitive-behavioral treatment of school refusal was efficacious and acceptable. The relative contributions of child therapy and parent/teacher training require further study.
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Affiliation(s)
- N J King
- Faculty of Education, Monash University, Clayton, Victoria, Australia
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Abstract
Despite advances in the assessment and treatment of childhood phobias, little is known about their etiology. Rachman has proposed that phobias are acquired through three different pathways: direct conditioning, modeling or instructions/information. We evaluate the empirical support for Rachman's theory in relation to the origins of childhood phobias. Although we find support for Rachman's theory, a number of methodological and theoretical issues are emphasized. For example, insufficient attention has been given to the reliability and validity of retrospective subject reports on the acquisition of childhood phobias. Also some findings on the origins of childhood fears and phobias are more consistent with a nonassociative account of phobia onset, thus providing an interesting challenge to Rachman's theory.
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Affiliation(s)
- N J King
- Monash University, Clayton, Vic., Australia
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King NJ, Ollendick TH, Murphy GC, Molloy GN. Utility of relaxation training with children in school settings: a plea for realistic goal setting and evaluation. Br J Educ Psychol 1998; 68 ( Pt 1):53-66. [PMID: 9589623 DOI: 10.1111/j.2044-8279.1998.tb01274.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 11/29/2022]
Abstract
BACKGROUND School-based relaxation training programmes are a popular means of helping children with anxiety problems such as headaches and test anxiety. AIMS Our major objective is to evaluate the empirical status of school-based relaxation training programmes. CONTENTS Focusing on progressive muscle relaxation training, we show how this adult training procedure has been modified for use with children. Several training issues are discussed including the questions of live versus recorded instruction and individual versus group instruction. We also discuss the evaluation of relaxation training programmes in school settings, highlighting issues of reliability and validity. CONCLUSIONS Our review of studies examining the efficacy of school-based relaxation training shows that improvements are usually modest and of dubious clinical or educational significance. Consequently we suggest that when relaxation training is used with school children treatment goals should be more modest or, that if improvements in specific performance areas are sought, then more comprehensive treatment packages be developed which can influence the successful performance of children in target areas and reduce anxiety to normal levels.
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Affiliation(s)
- N J King
- Faculty of Education, Monash University, Clayton, Victoria, Australia
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King NJ, Parr EL, Parr MB. Migration of lymphoid cells from vaginal epithelium to iliac lymph nodes in relation to vaginal infection by herpes simplex virus type 2. J Immunol 1998; 160:1173-80. [PMID: 9570531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
To determine whether lymphocytes and Langerhans cells in vaginal epithelium are migratory, we stained mouse vaginal epithelium, including its lymphoid cells, by intraluminal administration of H33342, a fluorescent, vital dye. Stromal staining was superficial, and no free dye reached the iliac lymph nodes. The numbers and phenotypes of H33342-stained cells that migrated from the vagina to the iliac lymph nodes during the next 48 h were determined in four groups: normal mice, mice infected intravaginally with wild-type herpes simplex virus type 2 (HSV-2), mice that were immune to vaginal HSV-2 infection, and immune mice that received vaginal challenge with HSV-2. H33342-stained cells migrated from the vaginal epithelium to the iliac lymph nodes in all groups and were mainly Thy-1.2+ cells and B220+ cells. The number of migrating Thy-1.2+ cells was similar to the sum of CD4+ and CD8+ cells in all groups and was not significantly different from the number of CD44+ cells, suggesting that most of the migrating T cells were memory cells. B lymphocytes comprised 31, 32, 43, and 68% of the migrating cells in the four groups, respectively. We found no evidence that Langerhans cells or macrophages were migrating. Thus, most MHC class II+ cells in all groups were accounted for by B cells, and migrating cells did not express B7.1 or F4/80 or exhibit indented nuclei or dendritic processes. We suggest that the migrating T cells and B cells probably belonged to a pool of lymphocytes that recirculates from blood to tissues and back to the lymph nodes via their afferent lymphatics.
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Affiliation(s)
- N J King
- Department of Pathology, University of Sydney, Australia
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Molloy GN, Wolstencroft K, King NJ, Lowe AR, Gardner PL, Rowley GL, Molloy EK, Murphy GC. Locus of control of smokers, nonsmokers, and nonpracticing smokers. Psychol Rep 1997; 81:781-2. [PMID: 9400070 DOI: 10.2466/pr0.1997.81.3.781] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 02/05/2023]
Abstract
In this survey, score analyses of 123 male and female respondents, ages 21 to 33 years, yielded no significant differences between either sex and smokers versus nonsmokers on Rotter's locus of control scale. Of particular interest was that nonpracticing smokers (quitters) scored more internal than either smokers or nonsmokers.
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Affiliation(s)
- G N Molloy
- Special Education Group, Faculty of Education, Monash University, Clayton, Australia
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35
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Shen J, T-To SS, Schrieber L, King NJ. Early E-selectin, VCAM-1, ICAM-1, and late major histocompatibility complex antigen induction on human endothelial cells by flavivirus and comodulation of adhesion molecule expression by immune cytokines. J Virol 1997; 71:9323-32. [PMID: 9371591 PMCID: PMC230235 DOI: 10.1128/jvi.71.12.9323-9332.1997] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.9] [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: 02/05/2023] Open
Abstract
Expression of E-selectin (ELAM-1, CD62E) on human umbilical vein endothelial cells significantly increased 30 min postinfection with the flavivirus West Nile virus (WNV), was maximal by 2 h postinfection, and declined to baseline levels within 24 h. Expression of ICAM-1 (CD54) and VCAM-1 (CD106) was significantly increased by 2 h and maximal at 4 h after infection. P-selectin (CD62P) expression was unaffected by WNV. Upregulation occurred earlier than that caused by tumor necrosis factor alpha (TNF-alpha) or interleukin 1 (IL-1) and could not be inhibited by neutralizing TNF-alpha, IL-1alpha, or alpha/beta interferon (IFN-alpha/beta) antibodies, suggesting a direct, virus-mediated phenomenon. TNF-alpha significantly enhanced WNV-induced increases in E-selectin, P-selectin, ICAM-1, and VCAM-1 expression, while IFN-gamma enhanced WNV-induced ICAM-1 expression. In contrast, IL-4 abrogated WNV-induced E-selectin expression increases but acted in synergy with WNV to increase P-selectin and VCAM-1 expression. WNV increased the expression of class I and II major histocompatibility complex antigens (MHC-I and MHC-II, respectively) at 24 and 72 h, respectively. IFN-gamma, TNF-alpha, or IL-1 acted in synergy with WNV to produce greater increases in MHC-I expression than WNV or cytokines alone, while IFN-alpha/beta or IL-4 had no effect. MHC-II induction in cytokine-treated, WNV-infected cells was similar to that caused by cytokines alone. Neutralizing IFN-alpha/beta antibody inhibited WNV-induced MHC-I expression by 30% at 24 h and by 100% by 72 h. The differential kinetics of modulation suggest sequential adhesion of leukocyte subpopulations to infected endothelial cells, which may be important in initial viral spread in vivo.
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Affiliation(s)
- J Shen
- Department of Pathology, University of Sydney, New South Wales, Australia
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36
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Blundell JE, Lawton CJ, King NJ. Problems of eating and appetite control in the elderly. Aging (Milano) 1997; 9:42. [PMID: 9358879 DOI: 10.1007/bf03339700] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- J E Blundell
- Department of Psychology, University of Leeds, UK
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Abstract
Childhood phobias can be successfully treated using a variety of behavioral strategies, provided there has been a psychometrically sound assessment. Measures are also important for the evaluation of treatment efficacy and the testing of hypotheses generated by new ideas and theories of children's phobias. This paper outlines broad-based assessment procedures used in the evaluation of children's phobias, including the behavioral or problem-focused interview, the diagnostic interview, self-report inventories, caregiver completed instruments, behavioral observations, self-monitoring and physiological assessment. Reflecting recent theoretical and clinical advances in the study of childhood internalizing disorders, we also explore laboratory-based measures and family assessment measures. Particular attention is given to psychometric issues and developmental sensitivity in our discussion of these assessment procedures.
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Affiliation(s)
- N J King
- School of Graduate Studies, Faculty of Education, Monash University, Clayton, Victoria, Australia
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Veale MF, Roberts NJ, King GF, King NJ. The generation of 1H-NMR-detectable mobile lipid in stimulated lymphocytes: relationship to cellular activation, the cell cycle, and phosphatidylcholine-specific phospholipase C. Biochem Biophys Res Commun 1997; 239:868-74. [PMID: 9367861 DOI: 10.1006/bbrc.1997.7566] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [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: 02/05/2023]
Abstract
Mobile lipids detected using 1H-NMR in stimulated lymphocytes were correlated with cell cycle phase, expression of the interleukin-2 receptor alpha and proliferation to assess the activation status of the lymphocytes. Mobile lipid levels, IL-2R alpha expression and proliferation increased after treatment with PMA and ionomycin. PMA or ionomycin stimulation alone induced increased IL-2R alpha expression but not proliferation. PMA- but not ionomycin-stimulation generated mobile lipid. Treatment with anti-CD3 antibody did not increase IL-2R alpha expression or proliferation but did generate increased amounts of mobile lipid. The cell cycle status of thymocytes treated with anti-CD3, PMA or ionomycin alone indicated an accumulation of the cells in the G1 phase of the cell cycle. The generation of mobile lipid was abrogated in anti-CD3 antibody-stimulated thymic lymphocytes but not in splenic lymphocytes, using a phosphatidylcholine-specific phospholipase C (PC-PLC) inhibitor which blocked cells in the G1/S phase of the cell cycle. This suggests that the 1H-NMR-detectable mobile lipid may be generated in anti-CD3 antibody-stimulated thymic lymphocytes by the action of PC-PLC activity via the catabolism of PC, in the absence of classical signs of activation.
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Affiliation(s)
- M F Veale
- Department of Pathology, University of Sydney, New South Wales, Australia
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Abstract
The expression of cell adhesion molecules of the Ig superfamily (Ig-CAM) were examined on embryonic stem (ES) cells during culture in vitro. ES cells maintained an undifferentiated phenotype when cultured in the presence of leukemia inhibitory factor (LIF) or with fibroblast feeder cells; > 90% of cells reacted positively to an antibody (ECMA-7) that marks undifferentiated ES cells. Using flow cytometry, high concentrations of ICAM-1, VCAM-1, and NCAM antigens were detected on undifferentiated ES cells, but their specific receptors, Mac-1, LFA-1, and VLA-4, were not detected. There was also no class I or II major histocompatibility complex (MHC) antigen expression. The ICAM-1 expressed was functional, since anti-ICAM-1 significantly (p < 0.0001) blocked ES cell-lymphocyte binding. Ig-CAM and MHC-1 expression on undifferentiated ES cells was not up-regulated by treatment of cells with interferon-gamma (IFN-gamma), tumor necrosis factor alpha, or flavivirus infection, agents that up-regulate these molecules in other embryonic cell types. Twelve hours after LIF withdrawal, ICAM-1 and NCAM expression decreased significantly, while VCAM-1 was undetectable. However, morphology and ECMA-7 expression remained unchanged. Similar patterns of expression were seen on ES cells maintained on fibroblast feeder cells. This suggests that LIF or other cytokines may maintain the expression of Ig-CAMs on undifferentiated cells. Differentiation was induced by dimethyl sulfoxide treatment for 14 days. Cells changed from a colony-forming to a monolayer morphology, and approximately 60% of the cell population no longer expressed ECMA-7. In these cells, VCAM-1 was undetectable and ICAM-1 and NCAM had declined to low levels. In these differentiated cells, ICAM-1 and MHC-1 were inducible by IFN-gamma. This study suggests that the pattern of expression of the Ig-CAMs in ES cells may have a role in defining the phenotype of differentiated and undifferentiated cells.
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Affiliation(s)
- L Tian
- Department of Pathology, University of Sydney, New South Wales, Australia
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Conway RM, Madigan MC, King NJ, Billson FA, Penfold PL. Human retinoblastoma: in vitro differentiation and immunoglobulin superfamily antigen modulation by retinoic acid. Cancer Immunol Immunother 1997; 44:189-96. [PMID: 9222276 PMCID: PMC11037805 DOI: 10.1007/s002620050372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Suspension and attachment cultures of Y79 human retinoblastoma cells were treated with all-trans retinoic acid (RA) for up to 10 days to assess its effect on growth and cell-surface expression of immunoglobulin superfamily antigens MHC class I and class II, ICAM-1, NCAM and Thy1. RA up to 10 microM induced growth inhibition, and marked morphological differentiation with extension of prominent processes resembling neurites was seen in attachment cultures. However, above 10 microM RA produced extensive cell death. We also observed increased cell-surface expression of MHC class I, ICAM-1, NCAM and Thy1 on Y79 cells treated with 10 microM over 10 days; constitutive MHC class II expression was not apparent, nor did RA treatment appear to induce Y79 cells to express MHC class immunoreactivity. The up-modulation of cell-adhesion molecules (NCAM, ICAM-1 and Thy1) and immune recognition molecules (NCAM, ICAM-1 and MHC class I), associated with reduced growth and tumour cell differentiation, suggests that RA may have a potential role in regulating the growth and development of retinoblastoma tumours.
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Affiliation(s)
- R M Conway
- Department of Clinical Ophthalmology, 1st Floor Sydney Eye Hospital, Woolloomooloo, NSW, Australia
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41
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Affiliation(s)
- N J King
- School of Graduate Studies, Monash University, Clayton, Victoria, Australia
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42
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Ibata B, Parr EL, King NJ, Parr MB. Migration of foreign lymphocytes from the mouse vagina into the cervicovaginal mucosa and to the iliac lymph nodes. Biol Reprod 1997; 56:537-43. [PMID: 9116158 DOI: 10.1095/biolreprod56.2.537] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [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: 02/04/2023] Open
Abstract
The mode of heterosexual transmission of human immunodeficiency virus (HIV) is not yet understood. The semen of HIV-infected men contains free virus and infected cells, and it is not known which of these is more important for sexual transmission of the virus to women. Some investigators have presented in vitro studies supporting a cellular mode of transmission of HIV and have suggested that infected lymphoid cells may act as the primary source of infection. This has become known as the "Trojan Horse" hypothesis. In vivo demonstrations of such events are lacking and are not likely to be forthcoming using human subjects. To investigate the ability of normal lymphoid cells to invade the cervicovaginal mucosa in an experimental animal, we stained C3H/He (H-2Kk) mouse peritoneal lymphoid cells with bisbenzimide, a vital fluorescent DNA-binding dye, and inoculated the cells atraumatically into the vaginas of progestin-treated, BALB/c (H-2Kd) recipient mice. Donor cells were identified in recipient tissues by their bisbenzimide-fluorescent nuclei and by fluorescein staining of the membrane antigen, H-2Kk. Donor lymphoid cells were observed in histological sections of recipient cervicovaginal mucosa and also in the iliac lymph nodes of 34 of 36 recipient mice 24 h after inoculation into the vagina. The number of donor cells in the iliac lymph nodes was 8.6 +/- 1.4 (mean +/- SEM) cells per mouse with a range of 0-35 cells per mouse. Approximately 28% of the donor lymphoid cells in recipient lymph nodes expressed CD4, which in humans is the receptor for HIV. We did not detect F4/80, a marker of mature mouse macrophages in the donor cell population, on any of the migrating cells in recipient lymph nodes. However, this negative result is equivocal, because the marker might be down-regulated after transfer or the migrating macrophages might be difficult to dissociate from the recipient lymph node tissue. These observations in mice support the suggestion that HIV-containing lymphoid cells in the semen of infected men may invade the cervicovaginal mucosa after sexual intercourse and deliver the virus to a woman's internal environment. However, both the donor cells and the recipient reproductive tract of the mice in the present study differed in significant respects from their counterparts in humans that might be involved in heterosexual HIV transmission. Further studies are needed to determine whether this possible mode of virus transmission is mainly responsible for heterosexual transmission of HIV in humans.
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Affiliation(s)
- B Ibata
- Department of Anatomy, Southern Illinois University, Carbondale 62901-6527, USA
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Abstract
This study evaluated Rachman's theory of fear acquisition in a sample of 30 children with dog phobia. The children were on the waiting list of a university-based clinic. Parents were asked to indicate the most influential factor in the onset of their child's dog phobia. Nearly all parents were able to attribute their child's phobia to one of the fear pathways: direct conditioning, modelling or transmission of information.
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Affiliation(s)
- N J King
- School of Graduate Studies, Faculty of Education, Monash University, Clayton, Vic., Australia
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44
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Veale MF, Dingley AJ, King GF, King NJ. 1H-NMR visible neutral lipids in activated T lymphocytes: relationship to phosphatidylcholine cycling. Biochim Biophys Acta 1996; 1303:215-21. [PMID: 8908156 DOI: 10.1016/0005-2760(96)00104-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Two-dimensional 1H-NMR spectroscopy was used to compare changes in the concentration of isotropically-tumbling neutral lipid during the activation of splenic and thymic T lymphocytes. The concentration of mobile neutral lipid (MNL) was similar in splenic and thymic T cells after 72 h of activation with phorbol myristate acetate and ionomycin. However, after 120 h of activation, MNL concentrations in splenic T cells were more than 3-fold higher than in thymic T cells. An increase in choline (Cho), phosphocholine (PCho) and glycerophosphocholine (GPC) was also observed in both thymic and splenic T cells after 24 h of activation. However, after 72 h of stimulation, Cho and PCho levels had decreased and continued to decline at 96-120 h, while GPC continued to be maintained at elevated levels. The simultaneous increase in MNL and GPC and the decline in Cho and PCho leads us to propose that the synthesis of NMR-visible MNL in activated lymphocytes is linked to the phosphatidylcholine cycle.
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Affiliation(s)
- M F Veale
- Department of Pathology, University of Sydney, N.S.W., Australia
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45
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King NJ, Tonge BJ. Behavioural assessment and treatment of chronic headaches in children. J Paediatr Child Health 1996; 32:359-61. [PMID: 8933389 DOI: 10.1111/j.1440-1754.1996.tb00928.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This review explores advances in the behavioural assessment and treatment of childhood headaches. Behavioural assessment procedures are outlined including the behavioural interview, self-report questionnaires, self-monitoring and caregiver observations. We conclude that behavioural treatment strategies are effective in the management of childhood headaches, although most of the research support appears to be limited to relaxation training and biofeedback. Nonetheless, the behavioural assessment and treatment of childhood headaches appears to be a promising clinical and research direction.
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Affiliation(s)
- N J King
- Faculty of Education, School of Graduate Studies, Monash University, Clayton, Vic., Australia
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Johnston LJ, Halliday GM, King NJ. Phenotypic changes in Langerhans' cells after infection with arboviruses: a role in the immune response to epidermally acquired viral infection? J Virol 1996; 70:4761-6. [PMID: 8676503 PMCID: PMC190413 DOI: 10.1128/jvi.70.7.4761-4766.1996] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.0] [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: 02/01/2023] Open
Abstract
The role of Langerhans cells (LC) in the initiation of an immune response to a viral infection remains unclear. In vivo epidermal infection with the arboviruses West Nile virus and Semliki Forest virus significantly increased the expression of major histocompatibility complex class II antigens, CD54, and CD80 on LC. Thus, during an epidermally acquired viral infection, local LC appear to mature to a phenotype approximating that of lymphoid dendritic cells. This change may be important in the activation of naïve T cells and the subsequent clearance of viral infection.
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Affiliation(s)
- L J Johnston
- Department of Pathology, University of Sydney, Sydney, New South Wales, Australia
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Gullone E, King NJ, Cummins RA. Fears of youth with mental retardation: psychometric evaluation of the Fear Survey Schedule for Children-II (FSSC-II). Res Dev Disabil 1996; 17:269-284. [PMID: 8827837 DOI: 10.1016/0891-4222(96)00008-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The nature and development of normal fear, although widely researched within the general population, has been seriously neglected for individuals with mental retardation. The present study involves the psychometric evaluation of the Fear Survey Schedule for Children-II with two samples: 187 children and adolescents with mental retardation and 372 intellectually average students. The schedule was demonstrated to have sound psychometric properties for both samples including good internal consistency and high retest reliability. Sound validity indices were determined by examining the relationships of fear scores with state, trait, and manifest anxiety scores. Comparison of the two samples yielded significant differences. In particular, students with mental retardation were found to score significantly higher than the comparison sample. In contrast to the age-related decrease in fear found for students of average intelligence, those with mental retardation did not demonstrate a decrease in self-reported fear with age. Gender differences were consistent across both samples with females reporting higher levels of fearfulness and a greater number of fears than males.
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Affiliation(s)
- E Gullone
- Dept. of Psychology, Monash University, Clayton, Victoria, Australia.
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Gullone E, Cummins RA, King NJ. Self-reported fears: a comparison study of youths with and without an intellectual disability. J Intellect Disabil Res 1996; 40 ( Pt 3):227-240. [PMID: 8809664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Normal fear plays an essential role in human development and experience, and much research attention has been devoted to its study in the general population. In contrast, the normal fears of youths with intellectual disabilities have largely been ignored. The present paper reports the normative fears of 187 youths with mild to moderate intellectual disabilities. Data were also gathered from 372 youths of average intelligence for comparison purposes. All respondents were aged between 7 and 18 years. Fear was assessed using the Fear Survey Schedule for Children-II (FSSC-II), an instrument which has been psychometrically validated in samples with and without disabilities. The youths with disabilities reported significantly higher levels of fearfulness and a greater range of fears than youths without disabilities. The content of their fears was also more likely to resemble those of younger children without disabilities. The fears that best discriminated between the two samples were those related to supernatural phenomena or animals. Included were fears of bees, lizards, ghosts or similar eerie things, and cemeteries. Nevertheless, there was considerable similarity between the two samples. For both samples, females reported a higher level of fearfulness and a greater range of fear than males, and fears of death and danger were endorsed as arousing the strongest fear for all respondents. The theoretical and applied implications of these results are discussed.
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Affiliation(s)
- E Gullone
- Department of Psychology, Monash University, Clayton, Victoria, Australia
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Abstract
The fears of childhood and adolescence may differ from one cultural context to another. We explored this possibility in 1200 American, Australian, Chinese, and Nigerian children and adolescents between 7 and 17 years of age. Responses to a standard fear survey schedule revealed significant differences in the number, content, pattern, and level of fears. Nigerian children and adolescents endorsed fears at higher levels than American, Australian, or Chinese youth who did not differ from one another. However, differences in the pattern and content of fears for boys and girls of different ages were noted across the countries. Results were interpreted within a cultural context, which suggested that cultures which favor inhibition, compliance, and obedience serve to increase levels of fear. Alternative interpretations are offered and limitations of cross-cultural research are explored.
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Affiliation(s)
- T H Ollendick
- Department of Psychology, Virginia Tech and State University, College of Arts and Sciences, Blacksburg 24061-0436, USA
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Abstract
OBJECTIVE To examine the reliability of the survey form of the Leyton Obsessional Inventory-Child Version (LOI-CV), ascertain the prevalence of self-reported obsessive-compulsive behaviour together with age and sex differences and identify the most common obsessive-compulsive behaviours and their associated level of interference. METHODOLOGY The survey form of the LOI-CV was administered to a large sample of children and adolescents attending regular schools. Participants were aged between 8 and 16 years (n = 1602). RESULTS We found the survey instrument to have adequate internal consistency and test-retest reliability. There was an age-related decline in self-reported obsessive-compulsive behaviour and girls reported a higher level of obsessive-compulsive behaviour than boys. The most common obsessive-compulsive behaviours included: repeated thoughts or words, having trouble making decisions, having to do certain things and doing things in the exact manner and having a bad conscience. For the most part, these behaviours were associated with low levels of interference. However, for a significant minority of youth (5 to 14%), these behaviours did cause problems and significantly interfered with their lives. CONCLUSIONS Although many obsessive-compulsive behaviours are part of normal development, they may still be problematic for some children and adolescents.
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Affiliation(s)
- N J King
- Faculty of Education, Monash University, Clayton, Victoria, Australia
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