1
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Karawita AC, Cheng Y, Chew KY, Challagulla A, Kraus R, Mueller RC, Tong MZW, Hulme KD, Bielefeldt-Ohmann H, Steele LE, Wu M, Sng J, Noye E, Bruxner TJ, Au GG, Lowther S, Blommaert J, Suh A, McCauley AJ, Kaur P, Dudchenko O, Aiden E, Fedrigo O, Formenti G, Mountcastle J, Chow W, Martin FJ, Ogeh DN, Thiaud-Nissen F, Howe K, Tracey A, Smith J, Kuo RI, Renfree MB, Kimura T, Sakoda Y, McDougall M, Spencer HG, Pyne M, Tolf C, Waldenström J, Jarvis ED, Baker ML, Burt DW, Short KR. The swan genome and transcriptome, it is not all black and white. Genome Biol 2023; 24:13. [PMID: 36683094 PMCID: PMC9867998 DOI: 10.1186/s13059-022-02838-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 12/12/2022] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND The Australian black swan (Cygnus atratus) is an iconic species with contrasting plumage to that of the closely related northern hemisphere white swans. The relative geographic isolation of the black swan may have resulted in a limited immune repertoire and increased susceptibility to infectious diseases, notably infectious diseases from which Australia has been largely shielded. Unlike mallard ducks and the mute swan (Cygnus olor), the black swan is extremely sensitive to highly pathogenic avian influenza. Understanding this susceptibility has been impaired by the absence of any available swan genome and transcriptome information. RESULTS Here, we generate the first chromosome-length black and mute swan genomes annotated with transcriptome data, all using long-read based pipelines generated for vertebrate species. We use these genomes and transcriptomes to show that unlike other wild waterfowl, black swans lack an expanded immune gene repertoire, lack a key viral pattern-recognition receptor in endothelial cells and mount a poorly controlled inflammatory response to highly pathogenic avian influenza. We also implicate genetic differences in SLC45A2 gene in the iconic plumage of the black swan. CONCLUSION Together, these data suggest that the immune system of the black swan is such that should any avian viral infection become established in its native habitat, the black swan would be in a significant peril.
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Affiliation(s)
- Anjana C. Karawita
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia ,grid.413322.50000 0001 2188 8254Commonwealth Scientific and Industrial Research Organisation, Australian Centre for Disease Preparedness, 5 Portarlington Road, Geelong, VIC 3220 Australia
| | - Yuanyuan Cheng
- grid.1013.30000 0004 1936 834XSchool of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006 Australia
| | - Keng Yih Chew
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Arjun Challagulla
- grid.413322.50000 0001 2188 8254Commonwealth Scientific and Industrial Research Organisation, Australian Centre for Disease Preparedness, 5 Portarlington Road, Geelong, VIC 3220 Australia
| | - Robert Kraus
- grid.507516.00000 0004 7661 536XDepartment of Migration, Max Planck Institute of Animal Behavior, Radolfzell, 78315 Germany ,grid.9811.10000 0001 0658 7699Department of Biology, University of Konstanz, Konstanz, 78457 Germany
| | - Ralf C. Mueller
- grid.507516.00000 0004 7661 536XDepartment of Migration, Max Planck Institute of Animal Behavior, Radolfzell, 78315 Germany ,grid.9811.10000 0001 0658 7699Department of Biology, University of Konstanz, Konstanz, 78457 Germany
| | - Marcus Z. W. Tong
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Katina D. Hulme
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Helle Bielefeldt-Ohmann
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Lauren E. Steele
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Melanie Wu
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Julian Sng
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Ellesandra Noye
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Timothy J. Bruxner
- grid.1003.20000 0000 9320 7537Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Gough G. Au
- grid.413322.50000 0001 2188 8254Commonwealth Scientific and Industrial Research Organisation, Australian Centre for Disease Preparedness, 5 Portarlington Road, Geelong, VIC 3220 Australia
| | - Suzanne Lowther
- grid.413322.50000 0001 2188 8254Commonwealth Scientific and Industrial Research Organisation, Australian Centre for Disease Preparedness, 5 Portarlington Road, Geelong, VIC 3220 Australia
| | - Julie Blommaert
- grid.8993.b0000 0004 1936 9457Department of Organismal Biology – Systematic Biology, Evolutionary Biology Centre, Uppsala University, Science for Life Laboratory, Uppsala, 752 36 Sweden ,The New Zealand Institute for Plant & Food Research Ltd, Nelson, 7010 New Zealand
| | - Alexander Suh
- grid.8993.b0000 0004 1936 9457Department of Organismal Biology – Systematic Biology, Evolutionary Biology Centre, Uppsala University, Science for Life Laboratory, Uppsala, 752 36 Sweden ,grid.8273.e0000 0001 1092 7967School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TU UK
| | - Alexander J. McCauley
- grid.413322.50000 0001 2188 8254Commonwealth Scientific and Industrial Research Organisation, Australian Centre for Disease Preparedness, 5 Portarlington Road, Geelong, VIC 3220 Australia
| | - Parwinder Kaur
- grid.1012.20000 0004 1936 7910School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009 Australia
| | - Olga Dudchenko
- grid.39382.330000 0001 2160 926XThe Centre for Genome Architecture, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030 USA ,grid.21940.3e0000 0004 1936 8278Centre for Theoretical Biological Physics and Department of Computer Science, Rice University, Houston, TX 77030 USA
| | - Erez Aiden
- grid.1012.20000 0004 1936 7910School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009 Australia ,grid.39382.330000 0001 2160 926XThe Centre for Genome Architecture, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030 USA ,grid.21940.3e0000 0004 1936 8278Centre for Theoretical Biological Physics and Department of Computer Science, Rice University, Houston, TX 77030 USA ,grid.66859.340000 0004 0546 1623Broad Institute of MIT and Harvard, Cambridge, MA 02139 USA ,Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech, Pudong, 201210 China
| | - Olivier Fedrigo
- grid.134907.80000 0001 2166 1519The Vertebrate Genome Laboratory, The Rockefeller University, NY, 10065 USA
| | - Giulio Formenti
- grid.134907.80000 0001 2166 1519The Vertebrate Genome Laboratory, The Rockefeller University, NY, 10065 USA
| | - Jacquelyn Mountcastle
- grid.134907.80000 0001 2166 1519The Vertebrate Genome Laboratory, The Rockefeller University, NY, 10065 USA
| | - William Chow
- grid.10306.340000 0004 0606 5382Tree of Life, Welcome Sanger Institute, Cambridge, CB10 1SA UK
| | - Fergal J. Martin
- grid.225360.00000 0000 9709 7726European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SD UK
| | - Denye N. Ogeh
- grid.225360.00000 0000 9709 7726European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SD UK
| | - Françoise Thiaud-Nissen
- grid.94365.3d0000 0001 2297 5165National Centre for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD USA
| | - Kerstin Howe
- grid.10306.340000 0004 0606 5382Tree of Life, Welcome Sanger Institute, Cambridge, CB10 1SA UK
| | - Alan Tracey
- grid.10306.340000 0004 0606 5382Tree of Life, Welcome Sanger Institute, Cambridge, CB10 1SA UK
| | - Jacqueline Smith
- grid.4305.20000 0004 1936 7988The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG UK
| | - Richard I. Kuo
- grid.4305.20000 0004 1936 7988The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG UK
| | - Marilyn B. Renfree
- grid.1008.90000 0001 2179 088XSchool of Biosciences, The University of Melbourne, Melbourne, VIC 3052 Australia
| | - Takashi Kimura
- grid.39158.360000 0001 2173 7691Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060-0818 Japan
| | - Yoshihiro Sakoda
- grid.39158.360000 0001 2173 7691Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060-0818 Japan
| | - Mathew McDougall
- New Zealand Fish & Game – Eastern Region, Rotorua, 3046 New Zealand
| | - Hamish G. Spencer
- grid.29980.3a0000 0004 1936 7830Department of Zoology, University of Otago, Dunedin, 9054 New Zealand
| | - Michael Pyne
- Currumbin Wildlife Sanctuary, Currumbin, QLD 4223 Australia
| | - Conny Tolf
- grid.8148.50000 0001 2174 3522Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, SE-391 82 Sweden
| | - Jonas Waldenström
- grid.8148.50000 0001 2174 3522Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, SE-391 82 Sweden
| | - Erich D. Jarvis
- grid.134907.80000 0001 2166 1519The Vertebrate Genome Laboratory, The Rockefeller University, NY, 10065 USA
| | - Michelle L. Baker
- grid.413322.50000 0001 2188 8254Commonwealth Scientific and Industrial Research Organisation, Australian Centre for Disease Preparedness, 5 Portarlington Road, Geelong, VIC 3220 Australia
| | - David W. Burt
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
| | - Kirsty R. Short
- grid.1003.20000 0000 9320 7537School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072 Australia
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2
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Van Brussel K, Mahar JE, Ortiz-Baez AS, Carrai M, Spielman D, Boardman WSJ, Baker ML, Beatty JA, Geoghegan JL, Barrs VR, Holmes EC. Faecal virome of the Australian grey-headed flying fox from urban/suburban environments contains novel coronaviruses, retroviruses and sapoviruses. Virology 2022; 576:42-51. [PMID: 36150229 DOI: 10.1016/j.virol.2022.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 09/02/2022] [Accepted: 09/04/2022] [Indexed: 01/04/2023]
Abstract
Bats are important reservoirs for viruses of public health and veterinary concern. Virus studies in Australian bats usually target the families Paramyxoviridae, Coronaviridae and Rhabdoviridae, with little known about their overall virome composition. We used metatranscriptomic sequencing to characterise the faecal virome of grey-headed flying foxes from three colonies in urban/suburban locations from two Australian states. We identified viruses from three mammalian-infecting (Coronaviridae, Caliciviridae, Retroviridae) and one possible mammalian-infecting (Birnaviridae) family. Of particular interest were a novel bat betacoronavirus (subgenus Nobecovirus) and a novel bat sapovirus (Caliciviridae), the first identified in Australian bats, as well as a potentially exogenous retrovirus. The novel betacoronavirus was detected in two sampling locations 1375 km apart and falls in a viral lineage likely with a long association with bats. This study highlights the utility of unbiased sequencing of faecal samples for identifying novel viruses and revealing broad-scale patterns of virus ecology and evolution.
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Affiliation(s)
- Kate Van Brussel
- Sydney Institute for Infectious Diseases, School of Life & Environmental Sciences and School of Medical Sciences, The University of Sydney, NSW, 2006, Australia
| | - Jackie E Mahar
- Sydney Institute for Infectious Diseases, School of Life & Environmental Sciences and School of Medical Sciences, The University of Sydney, NSW, 2006, Australia
| | - Ayda Susana Ortiz-Baez
- Sydney Institute for Infectious Diseases, School of Life & Environmental Sciences and School of Medical Sciences, The University of Sydney, NSW, 2006, Australia
| | - Maura Carrai
- Jockey Club College of Veterinary Medicine & Life Sciences, City University of Hong Kong, Kowloon Tong, People's Republic of China
| | - Derek Spielman
- School of Veterinary Science, Faculty of Science, University of Sydney, Sydney, NSW, 2006, Australia
| | - Wayne S J Boardman
- School of Animal and Veterinary Sciences, Faculty of Science, Engineering and Technology, University of Adelaide, Adelaide, SA, 5371, Australia
| | - Michelle L Baker
- CSIRO Australian Centre for Disease Preparedness, Health and Biosecurity Business Unit, Geelong, VIC, 3220, Australia
| | - Julia A Beatty
- Jockey Club College of Veterinary Medicine & Life Sciences, City University of Hong Kong, Kowloon Tong, People's Republic of China
| | - Jemma L Geoghegan
- Department of Microbiology and Immunology, University of Otago, Dunedin 9010, New Zealand; Institute of Environmental Science and Research, Wellington, 5022, New Zealand
| | - Vanessa R Barrs
- Jockey Club College of Veterinary Medicine & Life Sciences, City University of Hong Kong, Kowloon Tong, People's Republic of China; Centre for Animal Health and Welfare, City University of Hong Kong, Kowloon Tong, People's Republic of China.
| | - Edward C Holmes
- Sydney Institute for Infectious Diseases, School of Life & Environmental Sciences and School of Medical Sciences, The University of Sydney, NSW, 2006, Australia.
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3
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Pulscher LA, Peel AJ, Rose K, Welbergen JA, Baker ML, Boyd V, Low‐Choy S, Edson D, Todd C, Dorrestein A, Hall J, Todd S, Broder CC, Yan L, Xu K, Peck GR, Phalen DN. Serological evidence of a pararubulavirus and a betacoronavirus in the geographically isolated Christmas Island flying-fox (Pteropus natalis). Transbound Emerg Dis 2022; 69:e2366-e2377. [PMID: 35491954 PMCID: PMC9529767 DOI: 10.1111/tbed.14579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 03/27/2022] [Accepted: 04/25/2022] [Indexed: 12/30/2022]
Abstract
Due to their geographical isolation and small populations, insular bats may not be able to maintain acute immunizing viruses that rely on a large population for viral maintenance. Instead, endemic transmission may rely on viruses establishing persistent infections within hosts or inducing only short-lived neutralizing immunity. Therefore, studies on insular populations are valuable for developing broader understanding of viral maintenance in bats. The Christmas Island flying-fox (CIFF; Pteropus natalis) is endemic on Christmas Island, a remote Australian territory, and is an ideal model species to understand viral maintenance in small, geographically isolated bat populations. Serum or plasma (n = 190), oral swabs (n = 199), faeces (n = 31), urine (n = 32) and urine swabs (n = 25) were collected from 228 CIFFs. Samples were tested using multiplex serological and molecular assays, and attempts at virus isolation to determine the presence of paramyxoviruses, betacoronaviruses and Australian bat lyssavirus. Analysis of serological data provides evidence that the species is maintaining a pararubulavirus and a betacoronavirus. There was little serological evidence supporting the presence of active circulation of the other viruses assessed in the present study. No viral nucleic acid was detected and no viruses were isolated. Age-seropositivity results support the hypothesis that geographically isolated bat populations can maintain some paramyxoviruses and coronaviruses. Further studies are required to elucidate infection dynamics and characterize viruses in the CIFF. Lastly, apparent absence of some pathogens could have implications for the conservation of the CIFF if a novel disease were introduced into the population through human carriage or an invasive species. Adopting increased biosecurity protocols for ships porting on Christmas Island and for researchers and bat carers working with flying-foxes are recommended to decrease the risk of pathogen introduction and contribute to the health and conservation of the species.
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Affiliation(s)
- Laura A. Pulscher
- Faculty of ScienceSydney School of Veterinary ScienceUniversity of SydneySydneyNew South WalesAustralia
| | - Alison J. Peel
- Centre for Planetary Health and Food SecurityGriffith UniversityNathanQueenslandAustralia
| | - Karrie Rose
- Australian Registry of Wildlife HealthTaronga Conservation Society AustraliaMosmanNew South WalesAustralia
| | - Justin A. Welbergen
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityRichmondNew South WalesAustralia
| | - Michelle L. Baker
- Australian Centre for Disease Preparedness, Health and Biosecurity Business UnitCommonwealth Scientific and Industrial Research OrganizationGeelongVictoriaAustralia
| | - Victoria Boyd
- Australian Centre for Disease Preparedness, Health and Biosecurity Business UnitCommonwealth Scientific and Industrial Research OrganizationGeelongVictoriaAustralia
| | - Samantha Low‐Choy
- Centre for Planetary Health and Food SecurityGriffith UniversityNathanQueenslandAustralia
- Office of the Vice ChancellorArts/Education/LawGriffith UniversityBrisbaneQueenslandAustralia
| | - Dan Edson
- Department of AgricultureWater and the EnvironmentCanberraAustralian Capital TerritoryAustralia
| | - Christopher Todd
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityRichmondNew South WalesAustralia
| | - Annabel Dorrestein
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityRichmondNew South WalesAustralia
| | - Jane Hall
- Australian Registry of Wildlife HealthTaronga Conservation Society AustraliaMosmanNew South WalesAustralia
| | - Shawn Todd
- Australian Centre for Disease Preparedness, Health and Biosecurity Business UnitCommonwealth Scientific and Industrial Research OrganizationGeelongVictoriaAustralia
| | | | - Lianying Yan
- Department of MicrobiologyUniformed Services UniversityBethesdaMarylandUSA
- Henry M. Jackson Foundation for the Advancement of Military MedicineBethesdaMarylandUSA
| | - Kai Xu
- Department of Veterinary BiosciencesCollege of Veterinary MedicineThe Ohio State UniversityColumbusOhioUSA
| | - Grantley R. Peck
- Australian Centre for Disease Preparedness, Health and Biosecurity Business UnitCommonwealth Scientific and Industrial Research OrganizationGeelongVictoriaAustralia
| | - David N. Phalen
- Faculty of ScienceSydney School of Veterinary ScienceUniversity of SydneySydneyNew South WalesAustralia
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4
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Barr J, Boyd V, Todd S, Smith I, Prada D, O'Dea M, Jackson B, Pearce L, Adams TE, Vanderduys E, Westcott D, McKeown A, Baker ML, Marsh GA. Detection of filovirus-reactive antibodies in Australian bat species. J Gen Virol 2022; 103. [PMID: 35972225 DOI: 10.1099/jgv.0.001785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023] Open
Abstract
Bats have been implicated as the reservoir hosts of filoviruses in Africa, with serological evidence of filoviruses in various bat species identified in other countries. Here, serum samples from 190 bats, comprising 12 different species, collected in Australia were evaluated for filovirus antibodies. An in-house indirect microsphere assay to detect antibodies that cross-react with Ebola virus (Zaire ebolavirus; EBOV) nucleoprotein (NP) followed by an immunofluorescence assay (IFA) were used to confirm immunoreactivity to EBOV and Reston virus (Reston ebolavirus; RESTV). We found 27 of 102 Yinpterochiroptera and 19 of 88 Yangochiroptera samples were positive to EBOV NP in the microsphere assay. Further testing of these NP positive samples by IFA revealed nine bat sera that showed binding to ebolavirus-infected cells. This is the first report of filovirus-reactive antibodies detected in Australian bat species and suggests that novel filoviruses may be circulating in Australian bats.
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Affiliation(s)
- Jennifer Barr
- CSIRO, Health and Biosecurity, Australian Centre for Disease Preparedness, Geelong, Australia
| | - Victoria Boyd
- CSIRO, Health and Biosecurity, Australian Centre for Disease Preparedness, Geelong, Australia
| | - Shawn Todd
- CSIRO, Health and Biosecurity, Australian Centre for Disease Preparedness, Geelong, Australia
| | - Ina Smith
- CSIRO, Health and Biosecurity, Canberra, Australia
| | - Diana Prada
- Harry Butler Institute, Murdoch University, Western Australia
- College of Veterinary Medicine, Murdoch University, Western Australia
| | - Mark O'Dea
- Harry Butler Institute, Murdoch University, Western Australia
| | - Bethany Jackson
- College of Veterinary Medicine, Murdoch University, Western Australia
| | | | | | | | | | | | - Michelle L Baker
- CSIRO, Health and Biosecurity, Australian Centre for Disease Preparedness, Geelong, Australia
| | - Glenn A Marsh
- CSIRO, Health and Biosecurity, Australian Centre for Disease Preparedness, Geelong, Australia
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5
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Woolaston K, Nay Z, Baker ML, Brockett C, Bruce M, Degeling C, Gilbert J, Jackson B, Johnson H, Peel A, Sahibzada S, Oskam C, Hewitt CL. An argument for pandemic risk management using a multidisciplinary One Health approach to governance: an Australian case study. Global Health 2022; 18:73. [PMID: 35883185 PMCID: PMC9321311 DOI: 10.1186/s12992-022-00850-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 05/19/2022] [Indexed: 11/22/2022] Open
Abstract
The emergence of SARS-CoV-2 and the subsequent COVID-19 pandemic has resulted in significant global impact. However, COVID-19 is just one of several high-impact infectious diseases that emerged from wildlife and are linked to the human relationship with nature. The rate of emergence of new zoonoses (diseases of animal origin) is increasing, driven by human-induced environmental changes that threaten biodiversity on a global scale. This increase is directly linked to environmental drivers including biodiversity loss, climate change and unsustainable resource extraction. Australia is a biodiversity hotspot and is subject to sustained and significant environmental change, increasing the risk of it being a location for pandemic origin. Moreover, the global integration of markets means that consumption trends in Australia contributes to the risk of disease spill-over in our regional neighbours in Asia-Pacific, and beyond. Despite the clear causal link between anthropogenic pressures on the environment and increasing pandemic risks, Australia’s response to the COVID-19 pandemic, like most of the world, has centred largely on public health strategies, with a clear focus on reactive management. Yet, the span of expertise and evidence relevant to the governance of pandemic risk management is much wider than public health and epidemiology. It involves animal/wildlife health, biosecurity, conservation sciences, social sciences, behavioural psychology, law, policy and economic analyses to name just a few. The authors are a team of multidisciplinary practitioners and researchers who have worked together to analyse, synthesise, and harmonise the links between pandemic risk management approaches and issues in different disciplines to provide a holistic overview of current practice, and conclude the need for reform in Australia. We discuss the adoption of a comprehensive and interdisciplinary ‘One Health’ approach to pandemic risk management in Australia. A key goal of the One Health approach is to be proactive in countering threats of emerging infectious diseases and zoonoses through a recognition of the interdependence between human, animal, and environmental health. Developing ways to implement a One Health approach to pandemic prevention would not only reduce the risk of future pandemics emerging in or entering Australia, but also provide a model for prevention strategies around the world.
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Affiliation(s)
- Katie Woolaston
- School of Law, Queensland University of Technology, Brisbane, Australia.
| | - Zoe Nay
- School of Law, Queensland University of Technology, Brisbane, Australia
| | - Michelle L Baker
- CSIRO, Health and Biosecurity Business Unit, Australian Centre for Disease Preparedness, Geelong, Australia
| | - Callum Brockett
- School of Law, Queensland University of Technology, Brisbane, Australia
| | - Mieghan Bruce
- Biosecurity and One Health Research Centre, Harry Butler Institute, Murdoch University, Western Australia, Australia
| | - Chris Degeling
- Australian Centre for Health Engagement Evidence and Values, School of Health and Society, University of Wollongong, New South Wales, Australia
| | - Joshua Gilbert
- Worimi agriculturalist and researcher, Policy Advisor at the Jumbunna Institute for Indigenous Education and Research, University of Technology Sydney, Australia and PhD Candidate at Charles Sturt University, Bathurst, Australia
| | - Bethany Jackson
- Biosecurity and One Health Research Centre, Harry Butler Institute, Murdoch University, Western Australia, Australia
| | - Hope Johnson
- School of Law, Queensland University of Technology, Brisbane, Australia
| | - Alison Peel
- Centre for Planetary Health and Food Security, Griffith University, Brisbane, Australia
| | - Shafi Sahibzada
- Biosecurity and One Health Research Centre, Harry Butler Institute, Murdoch University, Western Australia, Australia
| | - Charlotte Oskam
- Biosecurity and One Health Research Centre, Harry Butler Institute, Murdoch University, Western Australia, Australia
| | - Chad L Hewitt
- Biosecurity and One Health Research Centre, Harry Butler Institute, Murdoch University, Western Australia, Australia
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6
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Chen Q, Langenbach S, Li M, Xia YC, Gao X, Gartner MJ, Pharo EA, Williams SM, Todd S, Clarke N, Ranganathan S, Baker ML, Subbarao K, Stewart AG. ACE2 Expression in Organotypic Human Airway Epithelial Cultures and Airway Biopsies. Front Pharmacol 2022; 13:813087. [PMID: 35359837 PMCID: PMC8963460 DOI: 10.3389/fphar.2022.813087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/31/2022] [Indexed: 12/15/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19) caused by infection with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is an acute respiratory disease with systemic complications. Therapeutic strategies for COVID-19, including repurposing (partially) developed drugs are urgently needed, regardless of the increasingly successful vaccination outcomes. We characterized two-dimensional (2D) and three-dimensional models (3D) to establish a physiologically relevant airway epithelial model with potential for investigating SARS-CoV-2 therapeutics. Human airway basal epithelial cells maintained in submerged 2D culture were used at low passage to retain the capacity to differentiate into ciliated, club, and goblet cells in both air-liquid interface culture (ALI) and airway organoid cultures, which were then analyzed for cell phenotype makers. Airway biopsies from non-asthmatic and asthmatic donors enabled comparative evaluation of the level and distribution of immunoreactive angiotensin-converting enzyme 2 (ACE2). ACE2 and transmembrane serine proteinase 2 (TMPRSS2) mRNA were expressed in ALI and airway organoids at levels similar to those of native (i.e., non-cultured) human bronchial epithelial cells, whereas furin expression was more faithfully represented in ALI. ACE2 was mainly localized to ciliated and basal epithelial cells in human airway biopsies, ALI, and airway organoids. Cystic fibrosis appeared to have no influence on ACE2 gene expression. Neither asthma nor smoking status had consistent marked influence on the expression or distribution of ACE2 in airway biopsies. SARS-CoV-2 infection of ALI cultures did not increase the levels of selected cytokines. Organotypic, and particularly ALI airway cultures are useful and practical tools for investigation of SARS-CoV-2 infection and evaluating the clinical potential of therapeutics for COVID-19.
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Affiliation(s)
- Qianyu Chen
- Department of Biochemistry and Pharmacology, School of Biomedical Science, University of Melbourne, Parkville, VIC, Australia
- ARC Centre for Personalized Therapeutics Technologies, University of Melbourne, Parkville, VIC, Australia
| | - Shenna Langenbach
- Department of Biochemistry and Pharmacology, School of Biomedical Science, University of Melbourne, Parkville, VIC, Australia
- ARC Centre for Personalized Therapeutics Technologies, University of Melbourne, Parkville, VIC, Australia
| | - Meina Li
- Department of Biochemistry and Pharmacology, School of Biomedical Science, University of Melbourne, Parkville, VIC, Australia
- ARC Centre for Personalized Therapeutics Technologies, University of Melbourne, Parkville, VIC, Australia
| | - Yuxiu C. Xia
- Department of Biochemistry and Pharmacology, School of Biomedical Science, University of Melbourne, Parkville, VIC, Australia
| | - Xumei Gao
- Department of Biochemistry and Pharmacology, School of Biomedical Science, University of Melbourne, Parkville, VIC, Australia
- ARC Centre for Personalized Therapeutics Technologies, University of Melbourne, Parkville, VIC, Australia
| | - Matthew J. Gartner
- Department of Microbiology and Immunology, University of Melbourne, Parkville, VIC, Australia
| | - Elizabeth A. Pharo
- CSIRO, Health and Biosecurity Business Unit, Australian Centre for Disease Preparedness, Geelong, VIC, Australia
| | - Sinéad M. Williams
- CSIRO, Health and Biosecurity Business Unit, Australian Centre for Disease Preparedness, Geelong, VIC, Australia
| | - Shawn Todd
- CSIRO, Health and Biosecurity Business Unit, Australian Centre for Disease Preparedness, Geelong, VIC, Australia
| | - Nadeene Clarke
- Murdoch Children’s Research Institute, The Royal Children’s Hospital, Parkville, VIC, Australia
| | - Sarath Ranganathan
- Murdoch Children’s Research Institute, The Royal Children’s Hospital, Parkville, VIC, Australia
- Department of Pediatrics, Melbourne Medical School, University of Melbourne, Parkville, VIC, Australia
| | - Michelle L. Baker
- CSIRO, Health and Biosecurity Business Unit, Australian Centre for Disease Preparedness, Geelong, VIC, Australia
| | - Kanta Subbarao
- Department of Microbiology and Immunology, University of Melbourne, Parkville, VIC, Australia
- WHO Collaborating Centre for Reference and Research on Influenza at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Alastair G. Stewart
- Department of Biochemistry and Pharmacology, School of Biomedical Science, University of Melbourne, Parkville, VIC, Australia
- ARC Centre for Personalized Therapeutics Technologies, University of Melbourne, Parkville, VIC, Australia
- *Correspondence: Alastair G. Stewart,
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7
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Cox-Witton K, Baker ML, Edson D, Peel AJ, Welbergen JA, Field H. Risk of SARS-CoV-2 transmission from humans to bats - An Australian assessment. One Health 2021; 13:100247. [PMID: 33969168 PMCID: PMC8092928 DOI: 10.1016/j.onehlt.2021.100247] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 12/18/2022] Open
Abstract
SARS-CoV-2, the cause of COVID-19, infected over 100 million people globally by February 2021. Reverse zoonotic transmission of SARS-CoV-2 from humans to other species has been documented in pet cats and dogs, big cats and gorillas in zoos, and farmed mink. As SARS-CoV-2 is closely related to known bat viruses, assessment of the potential risk of transmission of the virus from humans to bats, and its subsequent impacts on conservation and public health, is warranted. A qualitative risk assessment was conducted by a multi-disciplinary group to assess this risk in bats in the Australian context, with the aim of informing risk management strategies for human activities involving interactions with bats. The overall risk of SARS-CoV-2 establishing in an Australian bat population was assessed to be Low, however with a High level of uncertainty. The outcome of the assessment indicates that, for the Australian situation where the prevalence of COVID-19 in humans is very low, it is reasonable for research and rehabilitation of bats to continue, provided additional biosecurity measures are applied. Risk assessment is challenging for an emerging disease where information is lacking and the situation is changing rapidly; assessments should be revised if human prevalence or other important factors change significantly. The framework developed here, based on established animal disease risk assessment approaches adapted to assess reverse zoonotic transmission, has potential application to a range of wildlife species and situations.
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Affiliation(s)
| | - Michelle L. Baker
- CSIRO, Health and Biosecurity Business Unit, Australian Centre for Disease Preparedness, Geelong, VIC 3220, Australia
| | - Dan Edson
- Australian Department of Agriculture, Water and the Environment, Canberra, ACT, 2601, Australia
| | - Alison J. Peel
- Centre for Planetary Health and Food Security, Griffith University, Nathan, QLD, 4111, Australia
| | - Justin A. Welbergen
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW 2753, Australia
- Australasian Bat Society Inc, Milsons Point NSW 1565, Australia
| | - Hume Field
- EcoHealth Alliance, New York, NY, USA
- The University of Queensland, St Lucia, QLD, 4072, Australia
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8
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Tong ZWM, Karawita AC, Kern C, Zhou H, Sinclair JE, Yan L, Chew KY, Lowther S, Trinidad L, Challagulla A, Schat KA, Baker ML, Short KR. Primary Chicken and Duck Endothelial Cells Display a Differential Response to Infection with Highly Pathogenic Avian Influenza Virus. Genes (Basel) 2021; 12:genes12060901. [PMID: 34200798 PMCID: PMC8230508 DOI: 10.3390/genes12060901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 05/11/2021] [Revised: 06/05/2021] [Accepted: 06/08/2021] [Indexed: 01/12/2023] Open
Abstract
Highly pathogenic avian influenza viruses (HPAIVs) in gallinaceous poultry are associated with viral infection of the endothelium, the induction of a ‘cytokine storm, and severe disease. In contrast, in Pekin ducks, HPAIVs are rarely endothelial tropic, and a cytokine storm is not observed. To date, understanding these species-dependent differences in pathogenesis has been hampered by the absence of a pure culture of duck and chicken endothelial cells. Here, we use our recently established in vitro cultures of duck and chicken aortic endothelial cells to investigate species-dependent differences in the response of endothelial cells to HPAIV H5N1 infection. We demonstrate that chicken and duck endothelial cells display a different transcriptional response to HPAI H5N1 infection in vitro—with chickens displaying a more pro-inflammatory response to infection. As similar observations were recorded following in vitro stimulation with the viral mimetic polyI:C, these findings were not specific to an HPAIV H5N1 infection. However, similar species-dependent differences in the transcriptional response to polyI:C were not observed in avian fibroblasts. Taken together, these data demonstrate that chicken and duck endothelial cells display a different response to HPAIV H5N1 infection, and this may help account for the species-dependent differences observed in inflammation in vivo.
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Affiliation(s)
- Zhen Wei Marcus Tong
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia; (Z.W.M.T.); (A.C.K.); (J.E.S.); (L.Y.); (K.Y.C.)
| | - Anjana C. Karawita
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia; (Z.W.M.T.); (A.C.K.); (J.E.S.); (L.Y.); (K.Y.C.)
- CSIRO, Australian Centre for Disease Preparedness, Health, and Biosecurity Business Unit, Geelong 3219, Australia; (S.L.); (L.T.); (A.C.); (M.L.B.)
| | - Colin Kern
- Department of Animal Science, University of California, Davis, CA 95616, USA; (C.K.); (H.Z.)
| | - Huaijun Zhou
- Department of Animal Science, University of California, Davis, CA 95616, USA; (C.K.); (H.Z.)
| | - Jane E. Sinclair
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia; (Z.W.M.T.); (A.C.K.); (J.E.S.); (L.Y.); (K.Y.C.)
| | - Limin Yan
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia; (Z.W.M.T.); (A.C.K.); (J.E.S.); (L.Y.); (K.Y.C.)
| | - Keng Yih Chew
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia; (Z.W.M.T.); (A.C.K.); (J.E.S.); (L.Y.); (K.Y.C.)
| | - Sue Lowther
- CSIRO, Australian Centre for Disease Preparedness, Health, and Biosecurity Business Unit, Geelong 3219, Australia; (S.L.); (L.T.); (A.C.); (M.L.B.)
| | - Lee Trinidad
- CSIRO, Australian Centre for Disease Preparedness, Health, and Biosecurity Business Unit, Geelong 3219, Australia; (S.L.); (L.T.); (A.C.); (M.L.B.)
| | - Arjun Challagulla
- CSIRO, Australian Centre for Disease Preparedness, Health, and Biosecurity Business Unit, Geelong 3219, Australia; (S.L.); (L.T.); (A.C.); (M.L.B.)
| | - Karel A. Schat
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA;
| | - Michelle L. Baker
- CSIRO, Australian Centre for Disease Preparedness, Health, and Biosecurity Business Unit, Geelong 3219, Australia; (S.L.); (L.T.); (A.C.); (M.L.B.)
| | - Kirsty R. Short
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia; (Z.W.M.T.); (A.C.K.); (J.E.S.); (L.Y.); (K.Y.C.)
- Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane 4072, Australia
- Correspondence:
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9
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Abstract
The emergence of alternate variants of SARS-CoV-2 due to ongoing adaptations in humans and following human-to-animal transmission has raised concern over the efficacy of vaccines against new variants. We describe human-to-animal transmission (zooanthroponosis) of SARS-CoV-2 and its implications for faunal virus persistence and vaccine-mediated immunity.
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Affiliation(s)
- Arinjay Banerjee
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada; Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, ON L8S 4K1, Canada; McMaster Immunology Research Centre, McMaster University, Hamilton, ON L8S 4K1, Canada.
| | - Karen Mossman
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada; Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, ON L8S 4K1, Canada; McMaster Immunology Research Centre, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Michelle L Baker
- Australian Centre for Disease Preparedness, Health and Biosecurity Business Unit, Commonwealth Scientific and Industrial Research Organization, Geelong, VIC 3220, Australia.
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10
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Marsh GA, McAuley AJ, Brown S, Pharo EA, Crameri S, Au GG, Baker ML, Barr JA, Bergfeld J, Bruce MP, Burkett K, Durr PA, Holmes C, Izzard L, Layton R, Lowther S, Neave MJ, Poole T, Riddell SJ, Rowe B, Soldani E, Stevens V, Suen WW, Sundaramoorthy V, Tachedjian M, Todd S, Trinidad L, Williams SM, Druce JD, Drew TW, Vasan SS. In vitro characterisation of SARS-CoV-2 and susceptibility of domestic ferrets (Mustela putorius furo). Transbound Emerg Dis 2021; 69:297-307. [PMID: 33400387 DOI: 10.1111/tbed.13978] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/21/2020] [Accepted: 01/03/2021] [Indexed: 12/21/2022]
Abstract
Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is an emerging virus that has caused significant human morbidity and mortality since its detection in late 2019. With the rapid emergence has come an unprecedented programme of vaccine development with at least 300 candidates under development. Ferrets have proven to be an appropriate animal model for testing safety and efficacy of SARS-CoV-2 vaccines due to quantifiable virus shedding in nasal washes and oral swabs. Here, we outline our efforts early in the SARS-CoV-2 outbreak to propagate and characterize an Australian isolate of the virus in vitro and in an ex vivo model of human airway epithelium, as well as to demonstrate the susceptibility of domestic ferrets (Mustela putorius furo) to SARS-CoV-2 infection following intranasal challenge.
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Affiliation(s)
- Glenn A Marsh
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Alexander J McAuley
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Sheree Brown
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Elizabeth A Pharo
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Sandra Crameri
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Gough G Au
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Michelle L Baker
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Jennifer A Barr
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Jemma Bergfeld
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Matthew P Bruce
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Kathie Burkett
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Peter A Durr
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Clare Holmes
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Leonard Izzard
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Rachel Layton
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Suzanne Lowther
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Matthew J Neave
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Timothy Poole
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Sarah-Jane Riddell
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Brenton Rowe
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Elisha Soldani
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Vittoria Stevens
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Willy W Suen
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Vinod Sundaramoorthy
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia.,School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Mary Tachedjian
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Shawn Todd
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Lee Trinidad
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Sinéad M Williams
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Julian D Druce
- Victorian Infectious Diseases Reference Laboratory (VIDRL), The Royal Melbourne Hospital at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Trevor W Drew
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - Seshadri S Vasan
- Australian Centre for Disease Preparedness (ACDP), Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia.,Department of Health Sciences, University of York, York, YO10 5DD, UK
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11
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Boardman WSJ, Baker ML, Boyd V, Crameri G, Peck GR, Reardon T, Smith IG, Caraguel CGB, Prowse TAA. Serological evidence of exposure to a coronavirus antigenically related to severe acute respiratory syndrome virus (SARS-CoV-1) in the Grey-headed flying fox (Pteropus poliocephalus). Transbound Emerg Dis 2020; 68:2628-2632. [PMID: 33142031 DOI: 10.1111/tbed.13908] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/29/2020] [Accepted: 10/29/2020] [Indexed: 12/25/2022]
Abstract
Many infectious pathogens can be transmitted by highly mobile species, like bats that can act as reservoir hosts for viruses such as henipaviruses, lyssaviruses and coronaviruses. In this study, we investigated the seroepidemiology of protein antigens to Severe acute respiratory syndrome virus (SARS-CoV-1) and Middle eastern respiratory syndrome virus (MERS-CoV) in Grey-headed flying foxes (Pteropus poliocephalus) in Adelaide, Australia sampled between September 2015 and February 2018. A total of 301 serum samples were collected and evaluated using a multiplex Luminex binding assay, and median fluorescence intensity thresholds were determined using finite-mixture modelling. We found evidence of antibodies reactive to SARS-CoV-1 or a related antigen with 42.5% (CI: 34.3%-51.2%) seroprevalence but insufficient evidence of reactivity to MERS-CoV antigen. This study provides evidence that the Grey-headed flying foxes sampled in Adelaide have been exposed to a SARS-like coronavirus.
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Affiliation(s)
| | - Michelle L Baker
- Australian Centre for Disease Preparedness, Geelong, Vic, Australia
| | - Victoria Boyd
- Australian Centre for Disease Preparedness, Geelong, Vic, Australia
| | - Gary Crameri
- Australian Centre for Disease Preparedness, Geelong, Vic, Australia
| | - Grantley R Peck
- Australian Centre for Disease Preparedness, Geelong, Vic, Australia
| | | | - Ian G Smith
- The University of Adelaide, Adelaide, SA, Australia.,Zoos South Australia, Adelaide, SA, Australia
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12
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Abstract
This case study reports the successful deployment of the XEN45 gel stent (AbbVie Inc, Chicago, IL) through an ab externo approach in a 73-year-old woman with refractory glaucoma following high-risk penetrating keratoplasty (PK) 10 years prior. The PK was for corneal perforation secondary to peripheral ulcerative keratitis, which required systemic immunosuppression comprising intravenous cyclophosphamide, azathioprine, and corticosteroids to stabilise the disease and prevent corneal graft rejection. The patient’s intraocular pressure was reduced from 40 mmHg preoperatively to 12 mmHg six months after surgery, off medication. The patient’s visual acuity and visual fields remained stable. The XEN45 gel stent utilising the ab externo approach can be considered as a potential tool to lower intraocular pressure in patients with glaucoma after corneal keratoplasty.
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Affiliation(s)
- Lanxing Fu
- Department of Cornea, Manchester Royal Eye Hospital, Manchester, GBR
| | - Michelle L Baker
- Department of Glaucoma, Manchester Royal Eye Hospital, Manchester, GBR
| | - Fiona Carley
- Department of Cornea, Manchester Royal Eye Hospital, Manchester, GBR
| | - Leon Au
- Department of Glaucoma, Manchester Royal Eye Hospital, Manchester, GBR
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13
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Woon AP, Boyd V, Todd S, Smith I, Klein R, Woodhouse IB, Riddell S, Crameri G, Bingham J, Wang LF, Purcell AW, Middleton D, Baker ML. Acute experimental infection of bats and ferrets with Hendra virus: Insights into the early host response of the reservoir host and susceptible model species. PLoS Pathog 2020; 16:e1008412. [PMID: 32226041 PMCID: PMC7145190 DOI: 10.1371/journal.ppat.1008412] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 04/09/2020] [Accepted: 02/19/2020] [Indexed: 12/22/2022] Open
Abstract
Bats are the natural reservoir host for a number of zoonotic viruses, including Hendra virus (HeV) which causes severe clinical disease in humans and other susceptible hosts. Our understanding of the ability of bats to avoid clinical disease following infection with viruses such as HeV has come predominantly from in vitro studies focusing on innate immunity. Information on the early host response to infection in vivo is lacking and there is no comparative data on responses in bats compared with animals that succumb to disease. In this study, we examined the sites of HeV replication and the immune response of infected Australian black flying foxes and ferrets at 12, 36 and 60 hours post exposure (hpe). Viral antigen was detected at 60 hpe in bats and was confined to the lungs whereas in ferrets there was evidence of widespread viral RNA and antigen by 60 hpe. The mRNA expression of IFNs revealed antagonism of type I and III IFNs and a significant increase in the chemokine, CXCL10, in bat lung and spleen following infection. In ferrets, there was an increase in the transcription of IFN in the spleen following infection. Liquid chromatography tandem mass spectrometry (LC-MS/MS) on lung tissue from bats and ferrets was performed at 0 and 60 hpe to obtain a global overview of viral and host protein expression. Gene Ontology (GO) enrichment analysis of immune pathways revealed that six pathways, including a number involved in cell mediated immunity were more likely to be upregulated in bat lung compared to ferrets. GO analysis also revealed enrichment of the type I IFN signaling pathway in bats and ferrets. This study contributes important comparative data on differences in the dissemination of HeV and the first to provide comparative data on the activation of immune pathways in bats and ferrets in vivo following infection. Bats are natural reservoirs for a number of viruses, including HeV that cause severe disease in humans and other susceptible hosts. We examined acute HeV infection in pteropid bats, compared to ferrets, a species that develops fulminating disease following exposure to HeV, similar to humans. Analysis of HeV replication and transcription of innate immune genes was performed at 12, 36 and 60 hpe and global proteomics was performed on tissues at 60 hpe to obtain insight into the mechanisms responsible for innocuous (bats) compared to fatal (ferrets) HeV infection. We confirmed that both animal species had become infected on the basis of detection of viral RNA in bat lung (60 hpe) and ferret lung, lymph node, spleen, heart and intestine (36 and/or 60 hpe). Analysis of the transcription of IFNs and CXCL10, combined with global proteomics analysis revealed differences in the activation of the immune response between bats and ferrets, consistent with the difference in the control of viral replication and the development of pathology associated with disease between the two species. This study represents the first in vivo comparison between bats and a susceptible host and contributes important information on the kinetics and control of HeV in these two model species.
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Affiliation(s)
- Amanda P Woon
- Department of Biochemistry and Molecular Biology and Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Immunocore Ltd, Abingdon, Oxford, United Kingdom
| | - Victoria Boyd
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Shawn Todd
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Ina Smith
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Reuben Klein
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Isaac B Woodhouse
- Medical Research Council (MRC) Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine (WIMM), John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom.,Centre of Innate Immunity and Infectious Diseases, Hudson Institute of Medical Search, Clayton, Victoria, Australia
| | - Sarah Riddell
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Gary Crameri
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - John Bingham
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Lin-Fa Wang
- Programme in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, Singapore
| | - Anthony W Purcell
- Department of Biochemistry and Molecular Biology and Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Deborah Middleton
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Michelle L Baker
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Victoria, Australia
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14
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Di Marco M, Baker ML, Daszak P, De Barro P, Eskew EA, Godde CM, Harwood TD, Herrero M, Hoskins AJ, Johnson E, Karesh WB, Machalaba C, Garcia JN, Paini D, Pirzl R, Smith MS, Zambrana-Torrelio C, Ferrier S. Opinion: Sustainable development must account for pandemic risk. Proc Natl Acad Sci U S A 2020; 117:3888-3892. [PMID: 32060123 PMCID: PMC7049118 DOI: 10.1073/pnas.2001655117] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Affiliation(s)
- Moreno Di Marco
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Land and Water, EcoSciences Precinct, Dutton Park, QLD 4102, Australia;
- Department of Biology and Biotechnologies, Sapienza University of Rome, 00185 Rome, Italy
| | - Michelle L Baker
- CSIRO Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Geelong, VIC 3220, Australia
| | | | - Paul De Barro
- CSIRO Health & Biosecurity, EcoSciences Precinct, Dutton Park, QLD 4102, Australia
| | | | - Cecile M Godde
- CSIRO Agriculture and Food, St Lucia, QLD 4067, Australia
| | - Tom D Harwood
- CSIRO Land and Water, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
| | - Mario Herrero
- CSIRO Agriculture and Food, St Lucia, QLD 4067, Australia
| | - Andrew J Hoskins
- CSIRO Health and Biosecurity, James Cook University, Townsville, QLD 4810, Australia
| | - Erica Johnson
- EcoHealth Alliance, New York, NY 10001
- Department of Biology, City University of New York, New York, NY 10016
| | - William B Karesh
- EcoHealth Alliance, New York, NY 10001
- Global Health Security Agenda Consortium Steering Committee, Washington, DC 20201
- World Animal Health Organisation Working Group on Wildlife, Paris 75017, France
| | - Catherine Machalaba
- EcoHealth Alliance, New York, NY 10001
- Global Health Security Agenda Consortium Steering Committee, Washington, DC 20201
| | | | - Dean Paini
- CSIRO Health & Biosecurity, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
| | - Rebecca Pirzl
- CSIRO Land and Water, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
| | - Mark Stafford Smith
- CSIRO Land and Water, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
| | | | - Simon Ferrier
- CSIRO Land and Water, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
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15
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Abstract
In recent years, viruses similar to those that cause serious disease in humans and other mammals have been detected in apparently healthy bats. These include filoviruses, paramyxoviruses, and coronaviruses that cause severe diseases such as Ebola virus disease, Marburg haemorrhagic fever and severe acute respiratory syndrome (SARS) in humans. The evolution of flight in bats seem to have selected for a unique set of antiviral immune responses that control virus propagation, while limiting self-damaging inflammatory responses. Here, we summarize our current understanding of antiviral immune responses in bats and discuss their ability to co-exist with emerging viruses that cause serious disease in other mammals. We highlight how this knowledge may help us to predict viral spillovers into new hosts and discuss future directions for the field.
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Affiliation(s)
- Arinjay Banerjee
- Department of Pathology and Molecular Medicine, Michael DeGroote Institute for Infectious Disease Research, McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - Michelle L Baker
- Health and Biosecurity Business Unit, Australian Animal Health Laboratory, CSIRO, Geelong, VIC, Australia
| | - Kirsten Kulcsar
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Vikram Misra
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Raina Plowright
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Karen Mossman
- Department of Pathology and Molecular Medicine, Michael DeGroote Institute for Infectious Disease Research, McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
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16
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Peel AJ, Wells K, Giles J, Boyd V, Burroughs A, Edson D, Crameri G, Baker ML, Field H, Wang LF, McCallum H, Plowright RK, Clark N. Synchronous shedding of multiple bat paramyxoviruses coincides with peak periods of Hendra virus spillover. Emerg Microbes Infect 2020; 8:1314-1323. [PMID: 31495335 PMCID: PMC6746281 DOI: 10.1080/22221751.2019.1661217] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Within host-parasite communities, viral co-circulation and co-infections of hosts are the norm, yet studies of significant emerging zoonoses tend to focus on a single parasite species within the host. Using a multiplexed paramyxovirus bead-based PCR on urine samples from Australian flying foxes, we show that multi-viral shedding from flying fox populations is common. We detected up to nine bat paramyxoviruses shed synchronously. Multi-viral shedding infrequently coalesced into an extreme, brief and spatially restricted shedding pulse, coinciding with peak spillover of Hendra virus, an emerging fatal zoonotic pathogen of high interest. Such extreme pulses of multi-viral shedding could easily be missed during routine surveillance yet have potentially serious consequences for spillover of novel pathogens to humans and domestic animal hosts. We also detected co-occurrence patterns suggestive of the presence of interactions among viruses, such as facilitation and cross-immunity. We propose that multiple viruses may be interacting, influencing the shedding and spillover of zoonotic pathogens. Understanding these interactions in the context of broader scale drivers, such as habitat loss, may help predict shedding pulses of Hendra virus and other fatal zoonoses.
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Affiliation(s)
- Alison J Peel
- Environmental Futures Research Institute, Griffith University , Nathan , Queensland , Australia
| | - Konstans Wells
- Department of Biosciences, Swansea University , Swansea , Wales , UK
| | - John Giles
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health , Baltimore , MD , USA
| | - Victoria Boyd
- CSIRO, Health and Biosecurity Business Unit, Australian Animal Health Laboratory , Geelong , Vic , Australia
| | - Amy Burroughs
- CSIRO, Health and Biosecurity Business Unit, Australian Animal Health Laboratory , Geelong , Vic , Australia
| | - Daniel Edson
- Department of Agriculture, Animal Health Policy Branch , Canberra , ACT , Australia
| | - Gary Crameri
- CSIRO, Health and Biosecurity Business Unit, Australian Animal Health Laboratory , Geelong , Vic , Australia
| | - Michelle L Baker
- CSIRO, Health and Biosecurity Business Unit, Australian Animal Health Laboratory , Geelong , Vic , Australia
| | - Hume Field
- EcoHealth Alliance , New York , NY , USA.,School of Veterinary Science, The University of Queensland , Gatton , Queensland , Australia
| | - Lin-Fa Wang
- Programme in Emerging Infectious Diseases, Duke-National University of Singapore Medical School , Singapore
| | - Hamish McCallum
- Environmental Futures Research Institute, Griffith University , Nathan , Queensland , Australia
| | - Raina K Plowright
- Department of Microbiology and Immunology, Montana State University , Bozeman , Montana , USA
| | - Nicholas Clark
- UQ Spatial Epidemiology Laboratory, School of Veterinary Science, the University of Queensland , Gatton , Queensland , Australia
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17
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Prada D, Boyd V, Baker ML, O’Dea M, Jackson B. Viral Diversity of Microbats within the South West Botanical Province of Western Australia. Viruses 2019; 11:E1157. [PMID: 31847282 PMCID: PMC6950384 DOI: 10.3390/v11121157] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/06/2019] [Accepted: 12/06/2019] [Indexed: 12/30/2022] Open
Abstract
Bats are known reservoirs of a wide variety of viruses that rarely result in overt clinical disease in the bat host. However, anthropogenic influences on the landscape and climate can change species assemblages and interactions, as well as undermine host-resilience. The cumulative result is a disturbance of bat-pathogen dynamics, which facilitate spillover events to sympatric species, and may threaten bat communities already facing synergistic stressors through ecological change. Therefore, characterisation of viral pathogens in bat communities provides important basal information to monitor and predict the emergence of diseases relevant to conservation and public health. This study used targeted molecular techniques, serological assays and next generation sequencing to characterise adenoviruses, coronaviruses and paramyxoviruses from 11 species of insectivorous bats within the South West Botanical Province of Western Australia. Phylogenetic analysis indicated complex ecological interactions including virus-host associations, cross-species infections, and multiple viral strains circulating concurrently within selected bat populations. Additionally, we describe the entire coding sequences for five alphacoronaviruses (representing four putative new species), and one novel adenovirus. Results indicate that viral burden (both prevalence and richness) is not homogeneous among species, with Chalinolobus gouldii identified as a key epidemiological element within the studied communities.
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Affiliation(s)
- Diana Prada
- School of Veterinary Medicine, Murdoch University, Perth, WA 6150, Australia; (M.O.); (B.J.)
| | - Victoria Boyd
- Health and Biosecurity Business Unit, Australian Animal Health Laboratories, CSIRO, Geelong, VIC 3220, Australia; (V.B.); (M.L.B.)
| | - Michelle L. Baker
- Health and Biosecurity Business Unit, Australian Animal Health Laboratories, CSIRO, Geelong, VIC 3220, Australia; (V.B.); (M.L.B.)
| | - Mark O’Dea
- School of Veterinary Medicine, Murdoch University, Perth, WA 6150, Australia; (M.O.); (B.J.)
| | - Bethany Jackson
- School of Veterinary Medicine, Murdoch University, Perth, WA 6150, Australia; (M.O.); (B.J.)
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18
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Rezaee ME, Dunaway CM, Baker ML, Penna FJ, Chavez DR. Urothelial cell carcinoma of the bladder in pediatric patients: a systematic review and data analysis of the world literature. J Pediatr Urol 2019; 15:309-314. [PMID: 31326327 DOI: 10.1016/j.jpurol.2019.06.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 06/15/2019] [Indexed: 11/20/2022]
Abstract
BACKGROUND Urothelial cell carcinoma (UCC) of the bladder is exceedingly rare in pediatric patients. Limited data are available to guide management in this population. METHODS The authors systematically searched MEDLINE, Cochrane Library, and Google Scholar (through February 2019) for case reports and series to summarize data regarding presentation, evaluation, management, and follow-up for patients ≤ 18 years diagnosed with UCC of the bladder. Patient-level data were abstracted, and adjusted logistic regression was used to identify factors associated with a combined outcome of recurrence or death. RESULTS One hundred two articles describing 243 patients from 26 countries met criteria. Average age was 12.5 years, 32.6% were female, 15.3% had medical comorbidities, and 13.2% had known risk factors for bladder cancer. Initial management was transurethral resection in 95.5% of patients, whereas 6.2% required secondary intervention. Tumor stage was TaN0M0 in 86.4% and low grade in 93.4%. Recurrence and death occurred in 8.6% and 3.7%, respectively. Mean time to recurrence or death was 8.6 months (standard deviation [SD] 7.6) for 10.7%. Mean disease free follow-up without recurrence or death was 56.9 months (SD 54.2) for 89.3%. Patients with comorbidities, risk factors, or family history (odds ratio [OR]: 2.4, 95% confidence interval [CI]: 1.02-5.6); ≥TaN0M0 disease (OR: 6.2, 95% CI: 2.5-15.6); and larger tumors at diagnosis (OR: 1.7, 95% CI: 1.2-2.4) had significantly greater adjusted odds of recurrence or death after initial treatment. CONCLUSION Based on pooled results, disease recurrence or death occurred in 10.7% of pediatric patients and within 9 months for most and within 32 months for all patients. This may suggest that low-grade and stage UCC of the bladder in pediatric patients can be systematically monitored for at least 3 years. However, prospective evaluation of this clinical strategy is warranted.
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Affiliation(s)
- M E Rezaee
- Section of Urology, Department of Surgery, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH, 03756, USA.
| | - C M Dunaway
- Geisel School of Medicine at Dartmouth, 1 Rope Ferry Road, Hanover, NH, 03755, USA
| | - M L Baker
- Department of Pathology, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH, 03756, USA
| | - F J Penna
- Section of Urology, Department of Surgery, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH, 03756, USA; Pediatric Urology, Children's Hospital at Dartmouth, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH, 03756, USA
| | - D R Chavez
- Section of Urology, Department of Surgery, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH, 03756, USA; Pediatric Urology, Children's Hospital at Dartmouth, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH, 03756, USA
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19
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Hayward JA, Tachedjian M, Cui J, Cheng AZ, Johnson A, Baker ML, Harris RS, Wang LF, Tachedjian G. Differential Evolution of Antiretroviral Restriction Factors in Pteropid Bats as Revealed by APOBEC3 Gene Complexity. Mol Biol Evol 2019; 35:1626-1637. [PMID: 29617834 PMCID: PMC5995163 DOI: 10.1093/molbev/msy048] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Bats have attracted attention in recent years as important reservoirs of viruses deadly to humans and other mammals. These infections are typically nonpathogenic in bats raising questions about innate immune differences that might exist between bats and other mammals. The APOBEC3 gene family encodes antiviral DNA cytosine deaminases with important roles in the suppression of diverse viruses and genomic parasites. Here, we characterize pteropid APOBEC3 genes and show that species within the genus Pteropus possess the largest and most diverse array of APOBEC3 genes identified in any mammal reported to date. Several bat APOBEC3 proteins are antiviral as demonstrated by restriction of retroviral infectivity using HIV-1 as a model, and recombinant A3Z1 subtypes possess strong DNA deaminase activity. These genes represent the first group of antiviral restriction factors identified in bats with extensive diversification relative to homologues in other mammals.
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Affiliation(s)
- Joshua A Hayward
- Health Security Program, Life Sciences Discipline, Burnet Institute, Melbourne, VIC, Australia.,Department of Microbiology, Monash University, Clayton, VIC, Australia
| | - Mary Tachedjian
- Australian Animal Health Laboratory, Health and Biosecurity Business Unit, CSIRO, Geelong, VIC, Australia
| | - Jie Cui
- Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Adam Z Cheng
- Department of Biochemistry, Molecular Biology, and Biophysics, Institute for Molecular Virology, University of Minnesota, Minneapolis, MN
| | - Adam Johnson
- Health Security Program, Life Sciences Discipline, Burnet Institute, Melbourne, VIC, Australia
| | - Michelle L Baker
- Australian Animal Health Laboratory, Health and Biosecurity Business Unit, CSIRO, Geelong, VIC, Australia
| | - Reuben S Harris
- Department of Biochemistry, Molecular Biology, and Biophysics, Institute for Molecular Virology, University of Minnesota, Minneapolis, MN.,Howard Hughes Medical Institute, University of Minnesota, Minneapolis, MN
| | - Lin-Fa Wang
- Programme in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore
| | - Gilda Tachedjian
- Health Security Program, Life Sciences Discipline, Burnet Institute, Melbourne, VIC, Australia.,Department of Microbiology, Monash University, Clayton, VIC, Australia.,School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC, Australia.,Department of Microbiology and Immunology at the Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC, Australia
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20
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Gordon TB, Hayward JA, Marsh GA, Baker ML, Tachedjian G. Host and Viral Proteins Modulating Ebola and Marburg Virus Egress. Viruses 2019; 11:v11010025. [PMID: 30609802 PMCID: PMC6357148 DOI: 10.3390/v11010025] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 11/29/2018] [Revised: 12/21/2018] [Accepted: 01/01/2019] [Indexed: 12/11/2022] Open
Abstract
The filoviruses Ebolavirus and Marburgvirus are among the deadliest viral pathogens known to infect humans, causing emerging diseases with fatality rates of up to 90% during some outbreaks. The replication cycles of these viruses are comprised of numerous complex molecular processes and interactions with their human host, with one key feature being the means by which nascent virions exit host cells to spread to new cells and ultimately to a new host. This review focuses on our current knowledge of filovirus egress and the viral and host factors and processes that are involved. Within the virus, these factors consist of the major matrix protein, viral protein 40 (VP40), which is necessary and sufficient for viral particle release, and nucleocapsid and glycoprotein that interact with VP40 to promote egress. In the host cell, some proteins are hijacked by filoviruses in order to enhance virion budding capacity that include members of the family of E3 ubiquitin ligase and the endosomal sorting complexes required for transport (ESCRT) pathway, while others such as tetherin inhibit viral egress. An understanding of these molecular interactions that modulate viral particle egress provides an important opportunity to identify new targets for the development of antivirals to prevent and treat filovirus infections.
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Affiliation(s)
- Tamsin B Gordon
- Health Security Program, Life Sciences Discipline, Burnet Institute, Melbourne, VIC 3004, Australia.
- Department of Microbiology, Monash University, Clayton, VIC 3168, Australia.
| | - Joshua A Hayward
- Health Security Program, Life Sciences Discipline, Burnet Institute, Melbourne, VIC 3004, Australia.
- Department of Microbiology, Monash University, Clayton, VIC 3168, Australia.
| | - Glenn A Marsh
- Department of Microbiology, Monash University, Clayton, VIC 3168, Australia.
- CSIRO Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Geelong, VIC 3220, Australia.
| | - Michelle L Baker
- CSIRO Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Geelong, VIC 3220, Australia.
| | - Gilda Tachedjian
- Health Security Program, Life Sciences Discipline, Burnet Institute, Melbourne, VIC 3004, Australia.
- Department of Microbiology, Monash University, Clayton, VIC 3168, Australia.
- Department of Microbiology and Immunology, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, Melbourne VIC 3010, Australia.
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3000, Australia.
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21
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Abstract
A majority of viruses that have caused recent epidemics with high lethality rates in people, are zoonoses originating from wildlife. Among them are filoviruses (e.g., Marburg, Ebola), coronaviruses (e.g., SARS, MERS), henipaviruses (e.g., Hendra, Nipah) which share the common features that they are all RNA viruses, and that a dysregulated immune response is an important contributor to the tissue damage and hence pathogenicity that results from infection in humans. Intriguingly, these viruses also all originate from bat reservoirs. Bats have been shown to have a greater mean viral richness than predicted by their phylogenetic distance from humans, their geographic range, or their presence in urban areas, suggesting other traits must explain why bats harbor a greater number of zoonotic viruses than other mammals. Bats are highly unusual among mammals in other ways as well. Not only are they the only mammals capable of powered flight, they have extraordinarily long life spans, with little detectable increases in mortality or senescence until high ages. Their physiology likely impacted their history of pathogen exposure and necessitated adaptations that may have also affected immune signaling pathways. Do our life history traits make us susceptible to generating damaging immune responses to RNA viruses or does the physiology of bats make them particularly tolerant or resistant? Understanding what immune mechanisms enable bats to coexist with RNA viruses may provide critical fundamental insights into how to achieve greater resilience in humans.
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Affiliation(s)
- Judith N. Mandl
- Department of Physiology, McGill University, Montreal, QC, Canada
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
- McGill Research Center for Complex Traits, McGill University, Montreal, QC, Canada
| | - Caitlin Schneider
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
- McGill Research Center for Complex Traits, McGill University, Montreal, QC, Canada
| | - David S. Schneider
- Department of Microbiology and Immunology, Stanford University, Stanford, CA, United States
| | - Michelle L. Baker
- Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
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22
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Banerjee A, Misra V, Schountz T, Baker ML. Tools to study pathogen-host interactions in bats. Virus Res 2018; 248:5-12. [PMID: 29454637 PMCID: PMC7114677 DOI: 10.1016/j.virusres.2018.02.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 02/01/2018] [Accepted: 02/12/2018] [Indexed: 11/06/2022]
Abstract
Bats are important reservoir hosts for emerging zoonotic viruses. Viruses detected in bats are difficult to isolate using traditional cell lines. Bat cell lines provide critical tools to dissect host pathogen interactions. Little is known about immune cell populations and their responses in bats. Sharing reagents and cell lines will accelerate research and virus discovery.
Bats are natural reservoirs for a variety of emerging viruses that cause significant disease in humans and domestic animals yet rarely cause clinical disease in bats. The co-evolutionary history of bats with viruses has been hypothesized to have shaped the bat-virus relationship, allowing both to exist in equilibrium. Progress in understanding bat-virus interactions and the isolation of bat-borne viruses has been accelerated in recent years by the development of susceptible bat cell lines. Viral sequences similar to severe acute respiratory syndrome corona virus (SARS-CoV) have been detected in bats, and filoviruses such as Marburg virus have been isolated from bats, providing definitive evidence for the role of bats as the natural host reservoir. Although viruses can be readily detected in bats using molecular approaches, virus isolation is far more challenging. One of the limitations in using traditional culture systems from non-reservoir species is that cell types and culture conditions may not be compatible for isolation of bat-borne viruses. There is, therefore, a need to develop additional bat cell lines that correspond to different cell types, including less represented cell types such as immune cells, and culture them under more physiologically relevant conditions to study virus host interactions and for virus isolation. In this review, we highlight the current progress in understanding bat-virus interactions in bat cell line systems and some of the challenges and limitations associated with cell lines. Future directions to address some of these challenges to better understand host-pathogen interactions in these intriguing mammals are also discussed, not only in relation to viruses but also other pathogens carried by bats including bacteria and fungi.
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Affiliation(s)
- Arinjay Banerjee
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Vikram Misra
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Tony Schountz
- Department of Microbiology, Immunology and Pathology, Arthropod-borne and Infectious Diseases laboratory, Colorado State University, Fort Collins, USA
| | - Michelle L Baker
- CSIRO, Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Australia.
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23
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Schountz T, Baker ML, Butler J, Munster V. Immunological Control of Viral Infections in Bats and the Emergence of Viruses Highly Pathogenic to Humans. Front Immunol 2017; 8:1098. [PMID: 28959255 PMCID: PMC5604070 DOI: 10.3389/fimmu.2017.01098] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 08/22/2017] [Indexed: 01/20/2023] Open
Abstract
Bats are reservoir hosts of many important viruses that cause substantial disease in humans, including coronaviruses, filoviruses, lyssaviruses, and henipaviruses. Other than the lyssaviruses, they do not appear to cause disease in the reservoir bats, thus an explanation for the dichotomous outcomes of infections of humans and bat reservoirs remains to be determined. Bats appear to have a few unusual features that may account for these differences, including evidence of constitutive interferon (IFN) activation and greater combinatorial diversity in immunoglobulin genes that do not undergo substantial affinity maturation. We propose these features may, in part, account for why bats can host these viruses without disease and how they may contribute to the highly pathogenic nature of bat-borne viruses after spillover into humans. Because of the constitutive IFN activity, bat-borne viruses may be shed at low levels from bat cells. With large naive antibody repertoires, bats may control the limited virus replication without the need for rapid affinity maturation, and this may explain why bats typically have low antibody titers to viruses. However, because bat viruses have evolved in high IFN environments, they have enhanced countermeasures against the IFN response. Thus, upon infection of human cells, where the IFN response is not constitutive, the viruses overwhelm the IFN response, leading to abundant virus replication and pathology.
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Affiliation(s)
- Tony Schountz
- Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, United States
| | - Michelle L Baker
- Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Commonwealth Scientific and Industrial Research Organisation, Geelong, VIC, Australia
| | - John Butler
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, IA, United States
| | - Vincent Munster
- Virus Ecology Unit, Rocky Mountain Laboratories, National Institutes of Health, Hamilton, MT, United States
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24
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Ng JHJ, Tachedjian M, Wang LF, Baker ML. Insights into the ancestral organisation of the mammalian MHC class II region from the genome of the pteropid bat, Pteropus alecto. BMC Genomics 2017; 18:388. [PMID: 28521747 PMCID: PMC5437515 DOI: 10.1186/s12864-017-3760-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 05/03/2017] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Bats are an extremely successful group of mammals and possess a variety of unique characteristics, including their ability to co-exist with a diverse range of pathogens. The major histocompatibility complex (MHC) is the most gene dense and polymorphic region of the genome and MHC class II (MHC-II) molecules play a vital role in the presentation of antigens derived from extracellular pathogens and activation of the adaptive immune response. Characterisation of the MHC-II region of bats is crucial for understanding the evolution of the MHC and of the role of pathogens in shaping the immune system. RESULTS Here we describe the relatively contracted MHC-II region of the Australian black flying-fox (Pteropus alecto), providing the first detailed insight into the MHC-II region of any species of bat. Twelve MHC-II genes, including one locus (DRB2) located outside the class II region, were identified on a single scaffold in the bat genome. The presence of a class II locus outside the MHC-II region is atypical and provides evidence for an ancient class II duplication block. Two non-classical loci, DO and DM and two classical, DQ and DR loci, were identified in P. alecto. A putative classical, DPB pseudogene was also identified. The bat's antigen processing cluster, though contracted, remains highly conserved, thus supporting its importance in antigen presentation and disease resistance. CONCLUSIONS This detailed characterisation of the bat MHC-II region helps to fill a phylogenetic gap in the evolution of the mammalian class II region and is a stepping stone towards better understanding of the immune responses in bats to viral, bacterial, fungal and parasitic infections.
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Affiliation(s)
- Justin H J Ng
- CSIRO Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Geelong, VIC, 3220, Australia
- Faculty of Veterinary Science, University of Sydney, Sydney, NSW, 2006, Australia
- Programme in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, Singapore, 169857, Singapore
| | - Mary Tachedjian
- CSIRO Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Geelong, VIC, 3220, Australia
| | - Lin-Fa Wang
- CSIRO Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Geelong, VIC, 3220, Australia
- Programme in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, Singapore, 169857, Singapore
| | - Michelle L Baker
- CSIRO Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Geelong, VIC, 3220, Australia.
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25
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Leech S, Baker ML. The interplay between viruses and the immune system of bats. Microbiol Aust 2017. [DOI: 10.1071/ma17010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Bats are an abundant and diverse group of mammals with an array of unique characteristics, including their well-known roles as natural reservoirs for a variety of viruses. These include the deadly zoonotic paramyxoviruses; Hendra (HeV) and Nipah (NiV)1,2, lyssaviruses3, coronaviruses such as severe acute respiratory coronavirus (SARS-CoV)4 and filoviruses such as Marburg5. Although these viruses are highly pathogenic in other species, including humans, bats rarely show clinical signs of disease whilst maintaining the ability to transmit virus to susceptible vertebrate hosts. In addition, bats are capable of clearing experimental infections with henipaviruses, filoviruses and lyssaviruses at doses of infection that are lethal in other mammals6–12. Curiously, the ability of bats to tolerate viral infections does not appear to extend to extracellular pathogens such as bacteria, fungi and parasites13. Over the past few years, considerable headway has been made into elucidating the mechanisms responsible for the ability of bats to control viral replication, with evidence for unique differences in the innate immune responses of bats14–20. However, many questions remain around mechanisms responsible for the ability of bats to co-exist with viruses, including their ability to tolerate constitutive immune activation, the triggers associated with viral spillover events and the sites of viral replication. Although bats appear to have all of the major components of the immune system present in other species, their unique ecological characteristics (including flight, high density populations and migration) combined with their long co-evolutionary history with viruses has likely shaped their immune response resulting in an equilibrium between the host and its pathogens.
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26
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Martínez Gómez JM, Periasamy P, Dutertre CA, Irving AT, Ng JHJ, Crameri G, Baker ML, Ginhoux F, Wang LF, Alonso S. Phenotypic and functional characterization of the major lymphocyte populations in the fruit-eating bat Pteropus alecto. Sci Rep 2016; 6:37796. [PMID: 27883085 PMCID: PMC5121612 DOI: 10.1038/srep37796] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 11/02/2016] [Indexed: 12/11/2022] Open
Abstract
The unique ability of bats to act as reservoir for viruses that are highly pathogenic to humans suggests unique properties and functional characteristics of their immune system. However, the lack of bat specific reagents, in particular antibodies, has limited our knowledge of bat's immunity. Using cross-reactive antibodies, we report the phenotypic and functional characterization of T cell subsets, B and NK cells in the fruit-eating bat Pteropus alecto. Our findings indicate the predominance of CD8+ T cells in the spleen from wild-caught bats that may reflect either the presence of viruses in this organ or predominance of this cell subset at steady state. Instead majority of T cells in circulation, lymph nodes and bone marrow (BM) were CD4+ subsets. Interestingly, 40% of spleen T cells expressed constitutively IL-17, IL-22 and TGF-β mRNA, which may indicate a strong bias towards the Th17 and regulatory T cell subsets. Furthermore, the unexpected high number of T cells in bats BM could suggest an important role in T cell development. Finally, mitogenic stimulation induced proliferation and production of effector molecules by bats immune cells. This work contributes to a better understanding of bat's immunity, opening up new perspectives of therapeutic interventions for humans.
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Affiliation(s)
- Julia María Martínez Gómez
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Immunology programme, Life Sciences Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Pravin Periasamy
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Immunology programme, Life Sciences Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Charles-Antoine Dutertre
- Programme in Emerging Infectious Disease, Duke-NUS Medical School, Singapore
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR), Singapore
| | - Aaron Trent Irving
- Programme in Emerging Infectious Disease, Duke-NUS Medical School, Singapore
| | - Justin Han Jia Ng
- Programme in Emerging Infectious Disease, Duke-NUS Medical School, Singapore
| | - Gary Crameri
- CSIRO, Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Australia
| | - Michelle L. Baker
- CSIRO, Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Australia
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR), Singapore
| | - Lin-Fa Wang
- Programme in Emerging Infectious Disease, Duke-NUS Medical School, Singapore
| | - Sylvie Alonso
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Immunology programme, Life Sciences Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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Plowright RK, Peel AJ, Streicker DG, Gilbert AT, McCallum H, Wood J, Baker ML, Restif O. Transmission or Within-Host Dynamics Driving Pulses of Zoonotic Viruses in Reservoir-Host Populations. PLoS Negl Trop Dis 2016; 10:e0004796. [PMID: 27489944 PMCID: PMC4973921 DOI: 10.1371/journal.pntd.0004796] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Progress in combatting zoonoses that emerge from wildlife is often constrained by limited knowledge of the biology of pathogens within reservoir hosts. We focus on the host–pathogen dynamics of four emerging viruses associated with bats: Hendra, Nipah, Ebola, and Marburg viruses. Spillover of bat infections to humans and domestic animals often coincides with pulses of viral excretion within bat populations, but the mechanisms driving such pulses are unclear. Three hypotheses dominate current research on these emerging bat infections. First, pulses of viral excretion could reflect seasonal epidemic cycles driven by natural variations in population densities and contact rates among hosts. If lifelong immunity follows recovery, viruses may disappear locally but persist globally through migration; in either case, new outbreaks occur once births replenish the susceptible pool. Second, epidemic cycles could be the result of waning immunity within bats, allowing local circulation of viruses through oscillating herd immunity. Third, pulses could be generated by episodic shedding from persistently infected bats through a combination of physiological and ecological factors. The three scenarios can yield similar patterns in epidemiological surveys, but strategies to predict or manage spillover risk resulting from each scenario will be different. We outline an agenda for research on viruses emerging from bats that would allow for differentiation among the scenarios and inform development of evidence-based interventions to limit threats to human and animal health. These concepts and methods are applicable to a wide range of pathogens that affect humans, domestic animals, and wildlife.
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Affiliation(s)
- Raina K. Plowright
- Montana State University, Department of Microbiology and Immunology, Bozeman, Montana, United States of America
- Center for Infectious Disease Dynamics, Pennsylvania State University, State College, Pennsylvania, United States of America
- * E-mail:
| | - Alison J. Peel
- Environmental Futures Research Institute, Griffith University, Brisbane, Queensland, Australia
| | - Daniel G. Streicker
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, United Kingdom
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Amy T. Gilbert
- USDA/APHIS/WS National Wildlife Research Center, Fort Collins, Colorado, United States of America
| | - Hamish McCallum
- Griffith School of Environment, Griffith University, Brisbane, Queensland, Australia
| | - James Wood
- Disease Dynamics Unit, Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Michelle L. Baker
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Olivier Restif
- Disease Dynamics Unit, Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
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Wynne JW, Woon AP, Dudek NL, Croft NP, Ng JHJ, Baker ML, Wang LF, Purcell AW. Characterization of the Antigen Processing Machinery and Endogenous Peptide Presentation of a Bat MHC Class I Molecule. J Immunol 2016; 196:4468-76. [PMID: 27183594 DOI: 10.4049/jimmunol.1502062] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 03/23/2016] [Indexed: 11/19/2022]
Abstract
Bats are a major reservoir of emerging and re-emerging infectious diseases, including severe acute respiratory syndrome-like coronaviruses, henipaviruses, and Ebola virus. Although highly pathogenic to their spillover hosts, bats harbor these viruses, and a large number of other viruses, with little or no clinical signs of disease. How bats asymptomatically coexist with these viruses is unknown. In particular, little is known about bat adaptive immunity, and the presence of functional MHC molecules is mostly inferred from recently described genomes. In this study, we used an affinity purification/mass spectrometry approach to demonstrate that a bat MHC class I molecule, Ptal-N*01:01, binds antigenic peptides and associates with peptide-loading complex components. We identified several bat MHC class I-binding partners, including calnexin, calreticulin, protein disulfide isomerase A3, tapasin, TAP1, and TAP2. Additionally, endogenous peptide ligands isolated from Ptal-N*01:01 displayed a relatively broad length distribution and an unusual preference for a C-terminal proline residue. Finally, we demonstrate that this preference for C-terminal proline residues was observed in Hendra virus-derived peptides presented by Ptal-N*01:01 on the surface of infected cells. To our knowledge, this is the first study to identify endogenous and viral MHC class I ligands for any bat species and, as such, provides an important avenue for monitoring and development of vaccines against major bat-borne viruses both in the reservoir and spillover hosts. Additionally, it will provide a foundation to understand the role of adaptive immunity in bat antiviral responses.
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Affiliation(s)
- James W Wynne
- CSIRO Health and Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | - Amanda P Woon
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia; and
| | - Nadine L Dudek
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia; and
| | - Nathan P Croft
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia; and
| | - Justin H J Ng
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Graduate Medical School, Singapore 169857, Republic of Singapore
| | - Michelle L Baker
- CSIRO Health and Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | - Lin-Fa Wang
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Graduate Medical School, Singapore 169857, Republic of Singapore
| | - Anthony W Purcell
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia; and
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Ng JHJ, Tachedjian M, Deakin J, Wynne JW, Cui J, Haring V, Broz I, Chen H, Belov K, Wang LF, Baker ML. Evolution and comparative analysis of the bat MHC-I region. Sci Rep 2016; 6:21256. [PMID: 26876644 PMCID: PMC4753418 DOI: 10.1038/srep21256] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 01/20/2016] [Indexed: 12/22/2022] Open
Abstract
Bats are natural hosts to numerous viruses and have ancient origins, having diverged from other eutherian mammals early in evolution. These characteristics place them in an important position to provide insights into the evolution of the mammalian immune system and antiviral immunity. We describe the first detailed partial map of a bat (Pteropus alecto) MHC-I region with comparative analysis of the MHC-I region and genes. The bat MHC-I region is highly condensed, yet relatively conserved in organisation, and is unusual in that MHC-I genes are present within only one of the three highly conserved class I duplication blocks. We hypothesise that MHC-I genes first originated in the β duplication block, and subsequently duplicated in a step-wise manner across the MHC-I region during mammalian evolution. Furthermore, bat MHC-I genes contain unique insertions within their peptide-binding grooves potentially affecting the peptide repertoire presented to T cells, which may have implications for the ability of bats to control infection without overt disease.
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Affiliation(s)
- Justin H. J. Ng
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, VIC 3220, Australia
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, Singapore 169857
| | - Mary Tachedjian
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, VIC 3220, Australia
| | - Janine Deakin
- Institute for Applied Ecology, The University of Canberra, ACT 2617, Australia
| | - James W. Wynne
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, VIC 3220, Australia
| | - Jie Cui
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, Singapore 169857
| | - Volker Haring
- CSIRO, Australian Animal Health Laboratory, Geelong, VIC 3220, Australia
| | - Ivano Broz
- CSIRO, Australian Animal Health Laboratory, Geelong, VIC 3220, Australia
| | - Honglei Chen
- CSIRO, Australian Animal Health Laboratory, Geelong, VIC 3220, Australia
| | - Katherine Belov
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia
| | - Lin-Fa Wang
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, Singapore 169857
| | - Michelle L. Baker
- CSIRO Health and Biosecurity Business Unit, Australian Animal Health Laboratory, Geelong, VIC 3220, Australia
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Sánchez CA, Baker ML. Disease Risk Perception and Safety Practices: A Survey of Australian Flying Fox Rehabilitators. PLoS Negl Trop Dis 2016; 10:e0004411. [PMID: 26829399 PMCID: PMC4734781 DOI: 10.1371/journal.pntd.0004411] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 01/05/2016] [Indexed: 01/29/2023] Open
Abstract
Interactions with flying foxes pose disease transmission risks to volunteer rehabilitators (carers) who treat injured, ill, and orphaned bats. In particular, Australian bat lyssavirus (ABLV) can be transmitted directly from flying foxes to humans in Australia. Personal protective equipment (PPE) and rabies vaccination can be used to protect against lyssavirus infection. During May and June 2014, active Australian flying fox carers participated in an online survey (SOAR: Survey Of Australian flying fox Rehabilitators) designed to gather demographic data, assess perceptions of disease risk, and explore safety practices. Responses to open-ended questions were analysed thematically. A logistic regression was performed to assess whether rehabilitators’ gender, use of PPE, threat perception, and years of experience predicted variation in their odds of being bitten or scratched. Eligible responses were received from 122 rehabilitators located predominantly on the eastern coast of Australia. Eighty-four percent of respondents were female. Years of experience ranged from <1 to 30 years (median 5 years). Respondents were highly educated. All rehabilitators were vaccinated against rabies and 94% received a rabies titre check at least every two years. Sixty-three percent of carers did not perceive viruses in flying foxes as a potential threat to their health, yet 74% of carers reported using PPE when handling flying foxes. Eighty-three percent of rehabilitators had received a flying fox bite or scratch at some point during their career. Carers provide an important community service by rescuing and rehabilitating flying foxes. While rehabilitators in this study have many excellent safety practices, including a 100% vaccination rate against rabies, there is room for improvement in PPE use. We recommend 1) the establishment of an Australia-wide set of guidelines for safety when caring for bats and 2) that the responsible government agencies in Australia support carers who rescue potentially ABLV-infected bats by offering compensation for PPE. Wildlife rehabilitators can encounter risks when handling animals, such as physical harm and exposure to infectious diseases. In Australia, rehabilitators that care for fruit bats may be exposed to Australian bat lyssavirus if bitten or scratched, which is fatal to people not vaccinated against rabies. We initiated a survey to assess rehabilitators’ perceptions of disease risk associated with fruit bats as well as rehabilitators’ safety practices. Despite an excellent rabies vaccination rate (100%), we found room for improvement in use of personal protective equipment. Supporting this, our regression analysis showed that use of protective equipment is associated with less chance of being bitten or scratched. Rehabilitators that are able to safely handle fruit bats can reduce risk to themselves, model good behaviour for onlookers, and protect animals from euthanasia. We recommend that carers develop Australia-wide guidelines for safety when rehabilitating bats and that the responsible government agencies in Australia support carers who rescue potentially lyssavirus-infected bats by offering compensation for costly protective equipment.
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Affiliation(s)
- Cecilia A. Sánchez
- Odum School of Ecology, University of Georgia, Athens, Georgia, United States of America
- * E-mail:
| | - Michelle L. Baker
- CSIRO, Australian Animal Health Laboratory, Health and Biosecurity Business Unit, Geelong, Victoria, Australia
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Papenfuss AT, Feng ZP, Krasnec K, Deakin JE, Baker ML, Miller RD. Marsupials and monotremes possess a novel family of MHC class I genes that is lost from the eutherian lineage. BMC Genomics 2015; 16:535. [PMID: 26194104 PMCID: PMC4509613 DOI: 10.1186/s12864-015-1745-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 07/03/2015] [Indexed: 12/11/2022] Open
Abstract
Background Major histocompatibility complex (MHC) class I genes are found in the genomes of all jawed vertebrates. The evolution of this gene family is closely tied to the evolution of the vertebrate genome. Family members are frequently found in four paralogous regions, which were formed in two rounds of genome duplication in the early vertebrates, but in some species class Is have been subject to additional duplication or translocation, creating additional clusters. The gene family is traditionally grouped into two subtypes: classical MHC class I genes that are usually MHC-linked, highly polymorphic, expressed in a broad range of tissues and present endogenously-derived peptides to cytotoxic T-cells; and non-classical MHC class I genes generally have lower polymorphism, may have tissue-specific expression and have evolved to perform immune-related or non-immune functions. As immune genes can evolve rapidly and are subject to different selection pressure, we hypothesised that there may be divergent, as yet unannotated or uncharacterised class I genes. Results Application of a novel method of sensitive genome searching of available vertebrate genome sequences revealed a new, extensive sub-family of divergent MHC class I genes, denoted as UT, which has not previously been characterized. These class I genes are found in both American and Australian marsupials, and in monotremes, at an evolutionary chromosomal breakpoint, but are not present in non-mammalian genomes and have been lost from the eutherian lineage. We show that UT family members are expressed in the thymus of the gray short-tailed opossum and in other immune tissues of several Australian marsupials. Structural homology modelling shows that the proteins encoded by this family are predicted to have an open, though short, antigen-binding groove. Conclusions We have identified a novel sub-family of putatively non-classical MHC class I genes that are specific to marsupials and monotremes. This family was present in the ancestral mammal and is found in extant marsupials and monotremes, but has been lost from the eutherian lineage. The function of this family is as yet unknown, however, their predicted structure may be consistent with presentation of antigens to T-cells. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-1745-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anthony T Papenfuss
- Bioinformatics Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia. .,Department of Medical Biology, University of Melbourne, Melbourne, VIC, 3010, Australia. .,Peter MacCallum Cancer Centre, East Melbourne, VIC, 3002, Australia. .,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, 3010, Australia.
| | - Zhi-Ping Feng
- Bioinformatics Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Katina Krasnec
- Center for Evolutionary and Theoretical Immunology, Department of Biology, University of New Mexico, Albuquerque, NM, 87131-0001, USA
| | - Janine E Deakin
- Research School of Biology, Australian National University, Canberra, ACT, 2601, Australia.,Institute for Applied Ecology, University of Canberra, Canberra, ACT, 2601, Australia
| | - Michelle L Baker
- Center for Evolutionary and Theoretical Immunology, Department of Biology, University of New Mexico, Albuquerque, NM, 87131-0001, USA.,Australian Animal Health Laboratory, CSIRO, East Geelong, VIC, 3219, Australia
| | - Robert D Miller
- Center for Evolutionary and Theoretical Immunology, Department of Biology, University of New Mexico, Albuquerque, NM, 87131-0001, USA.
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Wynne JW, Shiell BJ, Marsh GA, Boyd V, Harper JA, Heesom K, Monaghan P, Zhou P, Payne J, Klein R, Todd S, Mok L, Green D, Bingham J, Tachedjian M, Baker ML, Matthews D, Wang LF. Proteomics informed by transcriptomics reveals Hendra virus sensitizes bat cells to TRAIL-mediated apoptosis. Genome Biol 2015; 15:532. [PMID: 25398248 DOI: 10.1186/preaccept-1718798964145132] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Bats are a major reservoir of emerging infectious viruses. Many of these viruses are highly pathogenic to humans however bats remain asymptomatic. The mechanism by which bats control viral replication is unknown. Here we utilize an integrated approach of proteomics informed by transcriptomics to compare the response of immortalized bat and human cells following infection with the highly pathogenic bat-borne Hendra virus (HeV). RESULTS The host response between the cell lines was significantly different at both the mRNA and protein levels. Human cells demonstrated minimal response eight hours post infection, followed by a global suppression of mRNA and protein abundance. Bat cells demonstrated a robust immune response eight hours post infection, which led to the up-regulation of apoptosis pathways, mediated through the tumor necrosis factor-related apoptosis inducing ligand (TRAIL). HeV sensitized bat cells to TRAIL-mediated apoptosis, by up-regulating death receptor transcripts. At 48 and 72 hours post infection, bat cells demonstrated a significant increase in apoptotic cell death. CONCLUSIONS This is the first study to comprehensively compare the response of bat and human cells to a highly pathogenic zoonotic virus. An early induction of innate immune processes followed by apoptosis of virally infected bat cells highlights the possible involvement of programmed cell death in the host response. Our study shows for the first time a side-by-side high-throughput analysis of a dangerous zoonotic virus in cell lines derived from humans and the natural bat host. This enables a way to search for divergent mechanisms at a molecular level that may influence host pathogenesis.
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33
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Wynne JW, Shiell BJ, Marsh GA, Boyd V, Harper JA, Heesom K, Monaghan P, Zhou P, Payne J, Klein R, Todd S, Mok L, Green D, Bingham J, Tachedjian M, Baker ML, Matthews D, Wang LF. Proteomics informed by transcriptomics reveals Hendra virus sensitizes bat cells to TRAIL-mediated apoptosis. Genome Biol 2015. [PMID: 25398248 PMCID: PMC4269970 DOI: 10.1186/s13059-014-0532-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background Bats are a major reservoir of emerging infectious viruses. Many of these viruses are highly pathogenic to humans however bats remain asymptomatic. The mechanism by which bats control viral replication is unknown. Here we utilize an integrated approach of proteomics informed by transcriptomics to compare the response of immortalized bat and human cells following infection with the highly pathogenic bat-borne Hendra virus (HeV). Results The host response between the cell lines was significantly different at both the mRNA and protein levels. Human cells demonstrated minimal response eight hours post infection, followed by a global suppression of mRNA and protein abundance. Bat cells demonstrated a robust immune response eight hours post infection, which led to the up-regulation of apoptosis pathways, mediated through the tumor necrosis factor-related apoptosis inducing ligand (TRAIL). HeV sensitized bat cells to TRAIL-mediated apoptosis, by up-regulating death receptor transcripts. At 48 and 72 hours post infection, bat cells demonstrated a significant increase in apoptotic cell death. Conclusions This is the first study to comprehensively compare the response of bat and human cells to a highly pathogenic zoonotic virus. An early induction of innate immune processes followed by apoptosis of virally infected bat cells highlights the possible involvement of programmed cell death in the host response. Our study shows for the first time a side-by-side high-throughput analysis of a dangerous zoonotic virus in cell lines derived from humans and the natural bat host. This enables a way to search for divergent mechanisms at a molecular level that may influence host pathogenesis. Electronic supplementary material The online version of this article (doi:10.1186/s13059-014-0532-x) contains supplementary material, which is available to authorized users.
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Cowled C, Stewart CR, Likic VA, Friedländer MR, Tachedjian M, Jenkins KA, Tizard ML, Cottee P, Marsh GA, Zhou P, Baker ML, Bean AG, Wang LF. Characterisation of novel microRNAs in the Black flying fox (Pteropus alecto) by deep sequencing. BMC Genomics 2014; 15:682. [PMID: 25128405 PMCID: PMC4156645 DOI: 10.1186/1471-2164-15-682] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 08/07/2014] [Indexed: 12/11/2022] Open
Abstract
Background Bats are a major source of new and emerging viral diseases. Despite the fact that bats carry and shed highly pathogenic viruses including Ebola, Nipah and SARS, they rarely display clinical symptoms of infection. Host factors influencing viral replication are poorly understood in bats and are likely to include both pre- and post-transcriptional regulatory mechanisms. MicroRNAs are a major mechanism of post-transcriptional gene regulation, however very little is known about them in bats. Results This study describes 399 microRNAs identified by deep sequencing of small RNA isolated from tissues of the Black flying fox, Pteropus alecto, a confirmed natural reservoir of the human pathogens Hendra virus and Australian bat lyssavirus. Of the microRNAs identified, more than 100 are unique amongst vertebrates, including a subset containing mutations in critical seed regions. Clusters of rapidly-evolving microRNAs were identified, as well as microRNAs predicted to target genes involved in antiviral immunity, the DNA damage response, apoptosis and autophagy. Closer inspection of the predicted targets for several highly supported novel miRNA candidates suggests putative roles in host-virus interaction. Conclusions MicroRNAs are likely to play major roles in regulating virus-host interaction in bats, via dampening of inflammatory responses (limiting the effects of immunopathology), and directly limiting the extent of viral replication, either through restricting the availability of essential factors or by controlling apoptosis. Characterisation of the bat microRNA repertoire is an essential step towards understanding transcriptional regulation during viral infection, and will assist in the identification of mechanisms that enable bats to act as natural virus reservoirs. This in turn will facilitate the development of antiviral strategies for use in humans and other species. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-682) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Christopher Cowled
- CSIRO Australian Animal Health Laboratory, 5 Portarlington Rd, Geelong East, Victoria 3220, Australia.
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Zhou P, Cowled C, Mansell A, Monaghan P, Green D, Wu L, Shi Z, Wang LF, Baker ML. IRF7 in the Australian black flying fox, Pteropus alecto: evidence for a unique expression pattern and functional conservation. PLoS One 2014; 9:e103875. [PMID: 25100081 PMCID: PMC4123912 DOI: 10.1371/journal.pone.0103875] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 07/02/2014] [Indexed: 12/21/2022] Open
Abstract
As the only flying mammal, bats harbor a number of emerging and re-emerging viruses, many of which cause severe diseases in humans and other mammals yet result in no clinical symptoms in bats. As the master regulator of the interferon (IFN)-dependent immune response, IFN regulatory factor 7 (IRF7) plays a central role in innate antiviral immunity. To explore the role of bat IRF7 in the regulation of the IFN response, we performed sequence and functional analysis of IRF7 from the pteropid bat, Pteropus alecto. Our results demonstrate that bat IRF7 retains the ability to bind to MyD88 and activate the IFN response despite unique changes in the MyD88 binding domain. We also demonstrate that bat IRF7 has a unique expression pattern across both immune and non-immune related tissues and is inducible by double-strand RNA. The broad tissue distribution of IRF7 may provide bats with an enhanced ability to rapidly activate the IFN response in a wider range of tissues compared to other mammals. The importance of IRF7 in antiviral activity against the bat reovirus, Pulau virus was confirmed by siRNA knockdown of IRF7 in bat cells resulting in enhanced viral replication. Our results highlight the importance of IRF7 in innate antiviral immunity in bats.
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Affiliation(s)
- Peng Zhou
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Chris Cowled
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Ashley Mansell
- Centre for Innate Immunity and Infectious Diseases, Monash Institute of Medical Research-Prince Henry Institute of Medical Research, Monash University, Clayton, Victoria, Australia
| | - Paul Monaghan
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Diane Green
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Lijun Wu
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Zhengli Shi
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Lin-Fa Wang
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Graduate Medical School, Singapore
| | - Michelle L. Baker
- CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
- * E-mail:
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Baker ML, Painter G, Hewitt AW, Amirul Islam FM, Szetu J, Qalo M, Keeffe J. Profile of ocular trauma in the Solomon Islands. Clin Exp Ophthalmol 2013; 42:440-6. [DOI: 10.1111/ceo.12256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Michelle L Baker
- Centre for Eye Research Australia; University of Melbourne; Melbourne Victoria Australia
- Ophthalmology Department; Royal Victorian Eye and Ear Hospital; Melbourne Victoria Australia
| | - Geoffrey Painter
- SAH Clinical School; The University of Sydney; Sydney New South Wales Australia
| | - Alex W Hewitt
- Centre for Eye Research Australia; University of Melbourne; Melbourne Victoria Australia
- Ophthalmology Department; Royal Victorian Eye and Ear Hospital; Melbourne Victoria Australia
- Lions Eye Institute; University of Western Australia; Perth Western Australia Australia
| | - F M Amirul Islam
- Centre for Eye Research Australia; University of Melbourne; Melbourne Victoria Australia
| | | | - Mundi Qalo
- National Referral Hospital; Honiara Solomon Islands
| | - Jill Keeffe
- Centre for Eye Research Australia; University of Melbourne; Melbourne Victoria Australia
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Zhou P, Cowled C, Wang LF, Baker ML. Bat Mx1 and Oas1, but not Pkr are highly induced by bat interferon and viral infection. Dev Comp Immunol 2013; 40:240-247. [PMID: 23541614 DOI: 10.1016/j.dci.2013.03.006] [Citation(s) in RCA: 32] [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] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 03/10/2013] [Accepted: 03/12/2013] [Indexed: 06/02/2023]
Abstract
Bats harbour many emerging and re-emerging viruses, several of which are highly pathogenic in other mammals but cause no diseases in bats. As the interferon (IFN) response represents a first line of defence against viral infection, the ability of bats to control viral replication may be linked to the activation of the IFN system. The three most studied antiviral IFN-stimulated genes (ISGs) in other mammals; Pkr, Mx1 and Oas1 were examined in our model bat species, Pteropus alecto. Our results demonstrate that the three ISGs from P. alecto are highly conserved in their functional domains and promoter elements compared to corresponding genes from other mammals. However, P. alecto Oas1 contains two IFN-stimulated response elements (ISRE) in its promoter region compared with the single ISRE present in human OAS1 which may lead to higher IFN inducibility of the bat gene. Both Oas1 and Mx1 were induced in a highly IFN-dependent manner following stimulation with IFN or synthetic double-strand RNA (dsRNA) whereas Pkr showed evidence of being induced in an IFN-independent manner. Furthermore, bat Oas1 appeared to be the most inducible of the three ISGs following either IFN stimulation or viral infection, providing evidence that Oas1 may play a more important role in antiviral activity in bats compared with Mx1 or Pkr. Our results have important implications for the different roles of ISGs in bats and provide the first step in understanding the role of these molecules in the ability of bats to coexist with viruses.
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Affiliation(s)
- Peng Zhou
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
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Epstein JH, Baker ML, Zambrana-Torrelio C, Middleton D, Barr JA, DuBovi E, Boyd V, Pope B, Todd S, Crameri G, Walsh A, Pelican K, Fielder MD, Davies AJ, Wang LF, Daszak P. Duration of Maternal Antibodies against Canine Distemper Virus and Hendra Virus in Pteropid Bats. PLoS One 2013; 8:e67584. [PMID: 23826322 PMCID: PMC3695084 DOI: 10.1371/journal.pone.0067584] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 05/22/2013] [Indexed: 02/02/2023] Open
Abstract
Old World frugivorous bats have been identified as natural hosts for emerging zoonotic viruses of significant public health concern, including henipaviruses (Nipah and Hendra virus), Ebola virus, and Marburg virus. Epidemiological studies of these viruses in bats often utilize serology to describe viral dynamics, with particular attention paid to juveniles, whose birth increases the overall susceptibility of the population to a viral outbreak once maternal immunity wanes. However, little is understood about bat immunology, including the duration of maternal antibodies in neonates. Understanding duration of maternally derived immunity is critical for characterizing viral dynamics in bat populations, which may help assess the risk of spillover to humans. We conducted two separate studies of pregnant Pteropus bat species and their offspring to measure the half-life and duration of antibodies to 1) canine distemper virus antigen in vaccinated captive Pteropus hypomelanus; and 2) Hendra virus in wild-caught, naturally infected Pteropus alecto. Both of these pteropid bat species are known reservoirs for henipaviruses. We found that in both species, antibodies were transferred from dam to pup. In P. hypomelanus pups, titers against CDV waned over a mean period of 228.6 days (95% CI: 185.4-271.8) and had a mean terminal phase half-life of 96.0 days (CI 95%: 30.7-299.7). In P. alecto pups, antibodies waned over 255.13 days (95% CI: 221.0-289.3) and had a mean terminal phase half-life of 52.24 days (CI 95%: 33.76-80.83). Each species showed a duration of transferred maternal immunity of between 7.5 and 8.5 months, which was longer than has been previously estimated. These data will allow for more accurate interpretation of age-related Henipavirus serological data collected from wild pteropid bats.
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Affiliation(s)
- Jonathan H. Epstein
- EcoHealth Alliance, New York, New York, United States of America
- Faculty of Science, Engineering and Computing, Kingston University, Kingston-Upon-Thames, United Kingdom
- * E-mail:
| | - Michelle L. Baker
- Commonwealth Science and Industrial Research Organization Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | | | - Deborah Middleton
- Commonwealth Science and Industrial Research Organization Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Jennifer A. Barr
- Commonwealth Science and Industrial Research Organization Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Edward DuBovi
- Animal Health Diagnostic Center at Cornell University, Ithaca, New York, United States of America
| | - Victoria Boyd
- Commonwealth Science and Industrial Research Organization Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Brian Pope
- Lubee Bat Conservancy, Gainesville, Florida, United States of America
| | - Shawn Todd
- Commonwealth Science and Industrial Research Organization Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Gary Crameri
- Commonwealth Science and Industrial Research Organization Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - Allyson Walsh
- San Diego Zoo Institute for Conservation Research, Escondido, California, United States of America
| | - Katey Pelican
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, Minnesota, United States of America
| | - Mark D. Fielder
- Faculty of Science, Engineering and Computing, Kingston University, Kingston-Upon-Thames, United Kingdom
| | - Angela J. Davies
- Faculty of Science, Engineering and Computing, Kingston University, Kingston-Upon-Thames, United Kingdom
| | - Lin-Fa Wang
- Commonwealth Science and Industrial Research Organization Australian Animal Health Laboratory, Geelong, Victoria, Australia
- Program in Emerging Infectious Diseases, Duke-NUS Graduate Medical School, Singapore
| | - Peter Daszak
- EcoHealth Alliance, New York, New York, United States of America
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Abstract
Despite being the second most species-rich and abundant group of mammals, bats are also among the least studied, with a particular paucity of information in the area of bat immunology. Although bats have a long history of association with rabies, the emergence and re-emergence of a number of viruses from bats that impact human and animal health has resulted in a resurgence of interest in bat immunology. Understanding how bats coexist with viruses in the absence of disease is essential if we are to begin to develop therapeutics to target viruses in humans and susceptible livestock and companion animals. Here, we review the current status of knowledge in the field of bat antiviral immunology including both adaptive and innate mechanisms of immune defence and highlight the need for further investigations in this area. Because data in this field are so limited, our discussion is based on both scientific discoveries and theoretical predictions. It is hoped that by provoking original, speculative or even controversial ideas or theories, this review may stimulate further research in this important field. Efforts to understand the immune systems of bats have been greatly facilitated in recent years by the availability of partial genome sequences from two species of bats, a megabat, Pteropus vampyrus, and a microbat, Myotis lucifugus, allowing the rapid identification of immune genes. Although bats appear to share most features of the immune system with other mammals, several studies have reported qualitative and quantitative differences in the immune responses of bats. These observations warrant further investigation to determine whether such differences are associated with the asymptomatic nature of viral infections in bats.
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Affiliation(s)
- M L Baker
- CSIRO Livestock Industries, Australian Animal Health Laboratory, Geelong, Vic., Australia.
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Zhang G, Cowled C, Shi Z, Huang Z, Bishop-Lilly KA, Fang X, Wynne JW, Xiong Z, Baker ML, Zhao W, Tachedjian M, Zhu Y, Zhou P, Jiang X, Ng J, Yang L, Wu L, Xiao J, Feng Y, Chen Y, Sun X, Zhang Y, Marsh GA, Crameri G, Broder CC, Frey KG, Wang LF, Wang J. Comparative analysis of bat genomes provides insight into the evolution of flight and immunity. Science 2013; 339:456-60. [PMID: 23258410 PMCID: PMC8782153 DOI: 10.1126/science.1230835] [Citation(s) in RCA: 403] [Impact Index Per Article: 36.6] [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: 12/22/2022]
Abstract
Bats are the only mammals capable of sustained flight and are notorious reservoir hosts for some of the world's most highly pathogenic viruses, including Nipah, Hendra, Ebola, and severe acute respiratory syndrome (SARS). To identify genetic changes associated with the development of bat-specific traits, we performed whole-genome sequencing and comparative analyses of two distantly related species, fruit bat Pteropus alecto and insectivorous bat Myotis davidii. We discovered an unexpected concentration of positively selected genes in the DNA damage checkpoint and nuclear factor κB pathways that may be related to the origin of flight, as well as expansion and contraction of important gene families. Comparison of bat genomes with other mammalian species has provided new insights into bat biology and evolution.
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Affiliation(s)
- Guojie Zhang
- BGI-Shenzhen, Shenzhen, 518083, China
- Centre for Social Evolution, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen, Denmark
| | - Christopher Cowled
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | - Zhengli Shi
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | | | | | | | - James W. Wynne
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | | | - Michelle L. Baker
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | - Wei Zhao
- BGI-Shenzhen, Shenzhen, 518083, China
| | - Mary Tachedjian
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | | | - Peng Zhou
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | | | - Justin Ng
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | - Lan Yang
- BGI-Shenzhen, Shenzhen, 518083, China
| | - Lijun Wu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Jin Xiao
- BGI-Shenzhen, Shenzhen, 518083, China
| | - Yue Feng
- BGI-Shenzhen, Shenzhen, 518083, China
| | | | | | | | - Glenn A. Marsh
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | - Gary Crameri
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
| | - Christopher C. Broder
- Department of Microbiology and Immunology, Uniformed Services University, Bethesda, MD 20814, USA
| | - Kenneth G. Frey
- Naval Medical Research Center and Henry M. Jackson Foundation, Fort Detrick, MD 21702, USA
| | - Lin-Fa Wang
- CSIRO Australian Animal Health Laboratory, Geelong, Victoria 3220, Australia
- Program in Emerging Infectious Diseases, Duke-NUS Graduate Medical School, Singapore 169857
| | - Jun Wang
- BGI-Shenzhen, Shenzhen, 518083, China
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
- Department of Biology, University of Copenhagen, DK-2200, Copenhagen, Denmark
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Wynne JW, Di Rubbo A, Shiell BJ, Beddome G, Cowled C, Peck GR, Huang J, Grimley SL, Baker ML, Michalski WP. Purification and characterisation of immunoglobulins from the Australian black flying fox (Pteropus alecto) using anti-fab affinity chromatography reveals the low abundance of IgA. PLoS One 2013; 8:e52930. [PMID: 23308125 PMCID: PMC3538733 DOI: 10.1371/journal.pone.0052930] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 11/22/2012] [Indexed: 11/19/2022] Open
Abstract
There is now an overwhelming body of evidence that implicates bats in the dissemination of a long list of emerging and re-emerging viral agents, often causing illnesses or death in both animals and humans. Despite this, there is a paucity of information regarding the immunological mechanisms by which bats coexist with highly pathogenic viruses. Immunoglobulins are major components of the adaptive immune system. Early studies found bats may have quantitatively lower antibody responses to model antigens compared to conventional laboratory animals. To further understand the antibody response of bats, the present study purified and characterised the major immunoglobulin classes from healthy black flying foxes, Pteropus alecto. We employed a novel strategy, where IgG was initially purified and used to generate anti-Fab specific antibodies. Immobilised anti-Fab specific antibodies were then used to capture other immunoglobulins from IgG depleted serum. While high quantities of IgM were successfully isolated from serum, IgA was not. Only trace quantities of IgA were detected in the serum by mass spectrometry. Immobilised ligands specific to IgA (Jacalin, Peptide M and staphylococcal superantigen-like protein) also failed to capture P. alecto IgA from serum. IgM was the second most abundant serum antibody after IgG. A survey of mucosal secretions found IgG was the dominant antibody class rather than IgA. Our study demonstrates healthy P. alecto bats have markedly less serum IgA than expected. Higher quantities of IgG in mucosal secretions may be compensation for this low abundance or lack of IgA. Knowledge and reagents developed within this study can be used in the future to examine class-specific antibody response within this important viral host.
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Affiliation(s)
- James W. Wynne
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
| | - Antonio Di Rubbo
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
| | - Brian J. Shiell
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
| | - Gary Beddome
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
| | - Christopher Cowled
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
| | - Grantley R. Peck
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
| | - Jing Huang
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
- School of Life Science, East China Normal University, Shanghai, China
| | - Samantha L. Grimley
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
| | - Michelle L. Baker
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
| | - Wojtek P. Michalski
- Australian Animal Health Laboratory, CSIRO Animal, Food and Health Sciences, Geelong, Victoria, Australia
- * E-mail:
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Abstract
Bats are the second most species rich and abundant group of mammals and display an array of unique characteristics but are also among the most poorly studied mammals. They fill an important ecological niche and have diversified into a wide range of habitats. In recent years, bats have been implicated as reservoirs for some of the most highly pathogenic emerging and re-emerging infectious diseases reported to date, including SARS-like coronavirus, Ebola, Hendra and Nipah viruses. The ability of bats to harbour these viruses in the absence of clinical signs of disease has resulted in a resurgence of interest in bat biology and virus–host interactions. Interest in bats, in Australia in particular, has intensified following the identification of several novel bat-borne viruses from flying-foxes, including Hendra virus, which is capable of spillover from bats to horses and subsequently to humans with potentially fatal consequences. As we continue to encroach on the natural habitats of bats, a better understanding of bat biology, ecology and virus–host interactions has never before been so critical. In this review, we focus on the biology of Australian pteropid bats and the pathogens they harbour, summarising current knowledge of bat-borne diseases, bat ecology, ethology and immunology.
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Liew G, Baker ML, Wong TY, Hand PJ, Wang JJ, Mitchell P, De Silva DA, Wong MC, Rochtchina E, Lindley RI, Wardlaw JM, Hankey GJ. Differing Associations of White Matter Lesions and Lacunar Infarction with Retinal Microvascular Signs. Int J Stroke 2012; 9:921-5. [DOI: 10.1111/j.1747-4949.2012.00865.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Accepted: 02/09/2012] [Indexed: 12/01/2022]
Abstract
Background White matter lesions (WML) and lacunar infarcts (LI) are believed to have microvascular etiologies but the exact microvascular changes occurring in each is unclear. Aim Using the retina as a proxy, we assessed retinal microvascular changes in WML and LI. Methods We prospectively recruited 1211 acute stroke patients. Four subgroups were identified from neuroimaging: WML alone, LI alone, both WML and LI, neither WML nor LI. Masked retinal photographs identified retinopathy and retinal arteriolar wall signs and measured retinal vascular caliber. Results Compared with 448 controls with neither WML nor LI, 384 patients with only WML were more likely to have retinopathy [odds ratio (OR) 1·5, 95% confidence interval (CI) 1·1 to 2·1] and enhanced arteriolar light reflex (OR 1·6, 95% CI 1·1 to 2·3); 200 patients with only LI were more likely to have arteriolar narrowing (OR 1·6, 95% CI 1·1 to 2·3) and enhanced arteriolar light reflex (OR 1·6, 95% CI 1·0 to 2·4); and 179 patients with both WML and LI were more likely to have arteriovenous nicking (OR 1·7, 95% CI 1·1 to 2·6), enhanced arteriolar light reflex (OR 2·0, 95% CI 1·3 to 3·2) and wider venules (OR 2·3, 95% CI 1·4 to 3·6). All analyses were adjusted for age, gender, study site and cardiovascular risk factors. Conclusion Both WML and LI were associated with retinal microvascular signs, supporting a microvascular etiology. Differing patterns of association suggest different mechanisms may predominate, e.g. greater endothelial permeability in WML, and ischemia associated with arteriolar wall disease in LI.
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Affiliation(s)
- Gerald Liew
- Centre for Vision Research, Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Michelle L. Baker
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia
| | - Tien Y. Wong
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia
- Singapore Eye Research Institute, National University of Singapore, Singapore
| | - Peter J. Hand
- Department of Neurology, Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia
| | - Jie Jin Wang
- Centre for Vision Research, Westmead Millennium Institute, University of Sydney, Sydney, Australia
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia
| | - Paul Mitchell
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia
| | - Deidre A. De Silva
- Singapore General Hospital Campus, National Neuroscience Institute, Singapore
| | | | - Elena Rochtchina
- Centre for Vision Research, Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Richard I. Lindley
- Discipline of Medicine, Sydney Medical School – Westmead, Westmead Hospital, University of Sydney, Sydney, Australia
| | - Joanna M. Wardlaw
- SINAPSE Collaboration, Division of Clinical Neurosciences, Western General Hospital, University of Edinburgh, Edinburgh, UK
| | - Graeme J. Hankey
- Royal Perth Hospital, University of Western Australia, Perth, Australia Received: 29 December 2011; Accepted 9 February 2012; Published online 18 September 2012
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Papenfuss AT, Baker ML, Feng ZP, Tachedjian M, Crameri G, Cowled C, Ng J, Janardhana V, Field HE, Wang LF. The immune gene repertoire of an important viral reservoir, the Australian black flying fox. BMC Genomics 2012; 13:261. [PMID: 22716473 PMCID: PMC3436859 DOI: 10.1186/1471-2164-13-261] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Accepted: 05/16/2012] [Indexed: 01/05/2023] Open
Abstract
Background Bats are the natural reservoir host for a range of emerging and re-emerging viruses, including SARS-like coronaviruses, Ebola viruses, henipaviruses and Rabies viruses. However, the mechanisms responsible for the control of viral replication in bats are not understood and there is little information available on any aspect of antiviral immunity in bats. Massively parallel sequencing of the bat transcriptome provides the opportunity for rapid gene discovery. Although the genomes of one megabat and one microbat have now been sequenced to low coverage, no transcriptomic datasets have been reported from any bat species. In this study, we describe the immune transcriptome of the Australian flying fox, Pteropus alecto, providing an important resource for identification of genes involved in a range of activities including antiviral immunity. Results Towards understanding the adaptations that have allowed bats to coexist with viruses, we have de novo assembled transcriptome sequence from immune tissues and stimulated cells from P. alecto. We identified about 18,600 genes involved in a broad range of activities with the most highly expressed genes involved in cell growth and maintenance, enzyme activity, cellular components and metabolism and energy pathways. 3.5% of the bat transcribed genes corresponded to immune genes and a total of about 500 immune genes were identified, providing an overview of both innate and adaptive immunity. A small proportion of transcripts found no match with annotated sequences in any of the public databases and may represent bat-specific transcripts. Conclusions This study represents the first reported bat transcriptome dataset and provides a survey of expressed bat genes that complement existing bat genomic data. In addition, these data provide insight into genes relevant to the antiviral responses of bats, and form a basis for examining the roles of these molecules in immune response to viral infection.
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Affiliation(s)
- Anthony T Papenfuss
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, VIC 3052, Australia
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Cowled C, Baker ML, Zhou P, Tachedjian M, Wang LF. Molecular characterisation of RIG-I-like helicases in the black flying fox, Pteropus alecto. Dev Comp Immunol 2012; 36:657-64. [PMID: 22166340 PMCID: PMC7103216 DOI: 10.1016/j.dci.2011.11.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 11/16/2011] [Accepted: 11/16/2011] [Indexed: 05/21/2023]
Abstract
The RIG-I like helicases, RIG-I, mda5 and LGP2 are an evolutionarily conserved family of cytosolic pattern recognition receptors important in the recognition of viral RNA, and responsible for the innate induction of interferons and proinflammatory cytokines upon viral infection. Bats are natural reservoir hosts to a variety of RNA viruses that cause significant morbidity and mortality in other species; however the mechanisms responsible for the control of viral replication in bats are not understood. This report describes the molecular cloning and expression analysis of RIG-I, mda5 and LGP2 genes in the fruit bat Pteropus alecto, and is the first description of RIG-I like helicases from any species of bat. Our results demonstrate that P. alecto RIG-I, mda5 and LGP2 have similar primary structures and tissue expression patterns to their counterparts in humans and other mammals. Stimulation of bat kidney cells with synthetic dsRNA (poly I:C) induced high levels of interferon β and rapid upregulation of all three helicases. These findings reveal that the cytoplasmic virus sensing machinery is present and intact in P. alecto. This study provides the foundation for further investigations into the interactions between bat RIG-I-like helicases and viruses to elucidate the mechanisms responsible for the asymptomatic nature of viral infections in bats.
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Affiliation(s)
- Christopher Cowled
- CSIRO Livestock Industries, Australian Animal Health Laboratory, 5 Portarlington Rd, East Geelong, Victoria 3220, Australia
- Corresponding authors at: CSIRO Livestock Industries, Australian Animal Health Laboratory, 5 Portarlington Rd, East Geelong, Victoria 3220, Australia. Tel.: +613 52275052; fax: +613 52275555 (M.L. Baker), tel.: +613 52275026; fax: +613 52275555 (C. Cowled).
| | - Michelle L. Baker
- CSIRO Livestock Industries, Australian Animal Health Laboratory, 5 Portarlington Rd, East Geelong, Victoria 3220, Australia
- Center for Evolutionary and Theoretical Immunology, Department of Biology, The University of New Mexico, Albuquerque, New Mexico 87131, USA
- Corresponding authors at: CSIRO Livestock Industries, Australian Animal Health Laboratory, 5 Portarlington Rd, East Geelong, Victoria 3220, Australia. Tel.: +613 52275052; fax: +613 52275555 (M.L. Baker), tel.: +613 52275026; fax: +613 52275555 (C. Cowled).
| | - Peng Zhou
- CSIRO Livestock Industries, Australian Animal Health Laboratory, 5 Portarlington Rd, East Geelong, Victoria 3220, Australia
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Mary Tachedjian
- CSIRO Livestock Industries, Australian Animal Health Laboratory, 5 Portarlington Rd, East Geelong, Victoria 3220, Australia
| | - Lin-Fa Wang
- CSIRO Livestock Industries, Australian Animal Health Laboratory, 5 Portarlington Rd, East Geelong, Victoria 3220, Australia
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Janardhana V, Tachedjian M, Crameri G, Cowled C, Wang LF, Baker ML. Cloning, expression and antiviral activity of IFNγ from the Australian fruit bat, Pteropus alecto. Dev Comp Immunol 2012; 36:610-8. [PMID: 22093696 PMCID: PMC7103211 DOI: 10.1016/j.dci.2011.11.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 10/26/2011] [Accepted: 11/01/2011] [Indexed: 05/05/2023]
Abstract
Bats are natural reservoir hosts to a variety of viruses, many of which cause morbidity and mortality in other mammals. Currently there is a paucity of information regarding the nature of the immune response to viral infections in bats, partly due to a lack of appropriate bat specific reagents. IFNγ plays a key role in controlling viral replication and coordinating a response for long term control of viral infection. Here we describe the cloning and expression of IFNγ from the Australian flying fox, Pteropus alecto and the generation of mouse monoclonal and chicken egg yolk antibodies specific to bat IFNγ. Our results demonstrate that P. alecto IFNγ is conserved with IFNγ from other species and is induced in bat splenocytes following stimulation with T cell mitogens. P. alecto IFNγ has antiviral activity on Semliki forest virus in cell lines from P. alecto and the microbat, Tadarida brasiliensis. Additionally recombinant bat IFNγ was able to mitigate Hendra virus infection in P. alecto cells. These results provide the first evidence for an antiviral role for bat IFNγin vitro in addition to the application of important immunological reagents for further studies of bat antiviral immunity.
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Affiliation(s)
- Vijaya Janardhana
- CSIRO Livestock Industries, Australian Animal Health Laboratory, P.O. Bag 24, Geelong, VIC 3220, Australia
| | - Mary Tachedjian
- CSIRO Livestock Industries, Australian Animal Health Laboratory, P.O. Bag 24, Geelong, VIC 3220, Australia
| | - Gary Crameri
- CSIRO Livestock Industries, Australian Animal Health Laboratory, P.O. Bag 24, Geelong, VIC 3220, Australia
| | - Chris Cowled
- CSIRO Livestock Industries, Australian Animal Health Laboratory, P.O. Bag 24, Geelong, VIC 3220, Australia
| | - Lin-Fa Wang
- CSIRO Livestock Industries, Australian Animal Health Laboratory, P.O. Bag 24, Geelong, VIC 3220, Australia
- Department of Microbiology and Immunology, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Michelle L. Baker
- CSIRO Livestock Industries, Australian Animal Health Laboratory, P.O. Bag 24, Geelong, VIC 3220, Australia
- Center for Evolutionary and Theoretical Immunology, Department of Biology, The University of New Mexico, Albuquerque, NM 87131, USA
- Corresponding author at: CSIRO Livestock Industries, Australian Animal Health Laboratory, P.O. Bag 24, Geelong, VIC 3220, Australia. Tel.: +61 3 5227 5052; fax: +61 3 5227 5555.
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Zhou P, Cowled C, Marsh GA, Shi Z, Wang LF, Baker ML. Type III IFN receptor expression and functional characterisation in the pteropid bat, Pteropus alecto. PLoS One 2011; 6:e25385. [PMID: 21980438 PMCID: PMC3181264 DOI: 10.1371/journal.pone.0025385] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Accepted: 09/02/2011] [Indexed: 01/09/2023] Open
Abstract
Bats are rich reservoir hosts for a variety of viruses, many of which are capable of spillover to other susceptible mammals with lethal consequences. The ability of bats to remain asymptomatic to viral infection may be due to the rapid control of viral replication very early in the immune response through innate antiviral mechanisms. Type I and III interferons (IFNs) represent the first line of defence against viral infection in mammals, with both families of IFNs present in pteropid bats. To obtain further insight into the type III IFN system in bats, we describe the characterization of the type III IFN receptor (IFNλR) in the black flying fox, P. alecto with the characterization of IFNλR1 and IL10R2 genes that make up the type III IFN receptor complex. The bat IFNλR complex has a wide tissue distribution and at the cellular level, both epithelial and immune cells are responsive to IFN-λ treatment. Furthermore, we demonstrate that the bat IFNλR1 chain acts as a functional receptor. To our knowledge, this report represents the first description of an IFN receptor in any species of bat. The responsiveness of bat cells to IFN-λ support a role for the type III IFN system by epithelial and immune cells in bats.
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Affiliation(s)
- Peng Zhou
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Victoria, Australia
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Chris Cowled
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Victoria, Australia
| | - Glenn A. Marsh
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Victoria, Australia
| | - Zhengli Shi
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Lin-Fa Wang
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Victoria, Australia
- Department of Microbiology and Immunology, The University of Melbourne, Parkville, Victoria, Australia
| | - Michelle L. Baker
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Victoria, Australia
- Department of Biology, Center for Evolutionary and Theoretical Immunology, The University of New Mexico, Albuquerque, New Mexico, United States of America
- * E-mail:
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Virtue ER, Marsh GA, Baker ML, Wang LF. Interferon production and signaling pathways are antagonized during henipavirus infection of fruit bat cell lines. PLoS One 2011; 6:e22488. [PMID: 21811620 PMCID: PMC3139658 DOI: 10.1371/journal.pone.0022488] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 06/22/2011] [Indexed: 12/28/2022] Open
Abstract
Bats are natural reservoirs for a spectrum of infectious zoonotic diseases including the recently emerged henipaviruses (Hendra and Nipah viruses). Henipaviruses have been observed both naturally and experimentally to cause serious and often fatal disease in many different mammal species, including humans. Interestingly, infection of the flying fox with henipaviruses occurs in the absence of clinical disease. The extreme variation in the disease pattern between humans and bats has led to an investigation into the effects of henipavirus infection on the innate immune response in bat cell lines. We report that henipavirus infection does not result in the induction of interferon expression, and the viruses also inhibit interferon signaling. We also confirm that the interferon production and signaling block in bat cells is not due to differing viral protein expression levels between human and bat hosts. This information, in addition to the known lack of clinical signs in bats following henipavirus infection, suggests that bats control henipavirus infection by an as yet unidentified mechanism, not via the interferon response. This is the first report of henipavirus infection in bat cells specifically investigating aspects of the innate immune system.
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Affiliation(s)
- Elena R. Virtue
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Australia
- Australian Biosecurity Cooperative Research Centre for Emerging Infectious Diseases, Brisbane, Australia
- Department of Microbiology and Immunology, The University of Melbourne, Melbourne, Australia
| | - Glenn A. Marsh
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Australia
- * E-mail:
| | - Michelle L. Baker
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Australia
| | - Lin-Fa Wang
- Australian Animal Health Laboratory, CSIRO Livestock Industries, Geelong, Australia
- Australian Biosecurity Cooperative Research Centre for Emerging Infectious Diseases, Brisbane, Australia
- Department of Microbiology and Immunology, The University of Melbourne, Melbourne, Australia
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Wang JJ, Baker ML, Hand PJ, Hankey GJ, Lindley RI, Rochtchina E, Wong TY, Liew G, Mitchell P. Transient Ischemic Attack and Acute Ischemic Stroke. Stroke 2011; 42:404-8. [DOI: 10.1161/strokeaha.110.598599] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Jie Jin Wang
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
| | - Michelle L. Baker
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
| | - Peter J. Hand
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
| | - Graeme J. Hankey
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
| | - Richard I. Lindley
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
| | - Elena Rochtchina
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
| | - Tien Y. Wong
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
| | - Gerald Liew
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
| | - Paul Mitchell
- From the Centre for Eye Research Australia (J.J.W., M.L.B., T.Y.W.), Royal Victorian Eye and Ear Hospital, University of Melbourne, Melbourne, Australia; the Centre for Vision Research (J.J.W., E.R., G.L., P.M.), Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; the Department of Neurology (P.J.H.), Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia; Royal Perth Hospital (G.J.H.), University of Western Australia, Western
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Abstract
AIM Patients with a high-output stoma (HOS) (> 2000 ml/day) suffer from dehydration, hypomagnesaemia and under-nutrition. This study aimed to determine the incidence, aetiology and outcome of HOS. METHOD The number of stomas fashioned between 2002 and 2006 was determined. An early HOS was defined as occurring in hospital within 3 weeks of stoma formation and a late HOS was defined as occurring after discharge. RESULTS Six-hundred and eighty seven stomas were fashioned (456 ileostomy/jejunostomy and 231 colostomy). An early HOS occurred in 75 (16%) ileostomies/jejunostomies. Formation of a jejunostomy (defined as having less than 200 cm remaining of proximal small bowel; n = 20) and intra-abdominal sepsis? obstruction (n = 14) were the commonest causes identified for early HOS. It was possible to stop parenteral infusions in 53 (71%) patients treated with oral hypotonic fluid restriction, glucose-saline solution and anti diarrhoeal medication. In 46 (61%) patients, the HOS resolved and no drug treatment was needed, 20 (27%) patients continued treatment, six (8%) of whom went home and continued to receive parenteral or subcutaneous saline, and nine died. Twenty-six patients had late HOS. Eleven were admitted with renal impairment and four had intermittent small-bowel obstruction. Eight patients were given long-term subcutaneous or parenteral saline and two also received parenteral nutrition. All had hypomagnesaemia. CONCLUSION Early high output from an ileostomy is common and although 49% resolved spontaneously, 51% needed ongoing medical treatment, usually because of a short small-bowel remnant.
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Affiliation(s)
- M L Baker
- Nutrition Support Team, Department of Dietetics, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK
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