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https://hdl.handle.net/2440/110993
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Type: | Journal article |
Title: | Proposed primary endpoints for use in clinical trials that compare treatment options for bloodstream infection in adults: a consensus definition |
Author: | Harris, P. McNamara, J. Paterson, D. Harris, P. McNamara, J. Lye, D. Davis, J. Tong, S. Davis, J. Bernard, L. Cheng, A. Cheng, A. Doi, Y. Fowler, V. Kaye, K. Leibovici, L. Leibovici, L. Lipman, J. Lipman, J. Lipman, J. et al. |
Citation: | Clinical Microbiology and Infection, 2017; 23(8):533-541 |
Publisher: | Elsevier |
Issue Date: | 2017 |
ISSN: | 1198-743X 1469-0691 |
Statement of Responsibility: | P.N.A.Harris, J.F.McNamara, D.C.Lye, J.S.Davis, L.Bernard, A.C.Cheng, Y.Doi, V.G.FowlerJr., K.S.Kaye, L.Leibovici, J.Lipman, M.J.Llewelyn, S.Munoz-Price, M.Paul, A.Y.Peleg, J.Rodríguez-Baño, B.A.Rogers, H.Seifert, V.Thamlikitkul, G.Thwaites, S.Y.C.Tong, J.Turnidge, R.Utili, S.A.R.Webb, D.L.Paterson |
Abstract: | Objective: To examine if the protective effect of parasite infection on experimental autoimmune encephalomyelitis (EAE) was due to interleukin (IL)-5, a cytokine produced by a type-2 response that induces eosinophilia. We hypothesize that, in parasite infections, IL-5 also promotes expansion of antigen-specific T regulatory cells that control autoimmunity. Methods: Nippostrongylus brasiliensis larvae were used to infect Lewis rats prior to induction of EAE by myelin basic protein. Animals were sham treated, or given blocking monoclonal antibodies to interleukin 4 or 5 or to deplete CD25+ T cells. Reactivity of CD4+CD25+ T regulatory cells from these animals was examined. Results: Parasite-infected hosts had reduced severity and length of EAE. The beneficial effect of parasitic infection was abolished with an anti-IL-5 or an anti-CD25 monoclonal antibody (mAb), but not anti-IL-4 mAb. Parasite-infected animals with EAE developed antigen-specific CD4+CD25+ T regulatory cells earlier than EAE controls and these expressed more Il5ra than controls. Treatment with IL-5 also reduced the severity of EAE and induced Il5ra expressing CD4+CD25+ T regulatory cells. Interpretation: The results of this study suggested that IL-5 produced by the type-2 inflammatory response to parasite infection promoted induction of autoantigen-specific CD25+Il5ra+ T regulatory cells that reduced the severity of autoimmunity. Such a mechanism may explain the protective effect of parasite infection in patients with multiple sclerosis where eosinophilia is induced by IL-5, produced by the immune response to parasites. |
Keywords: | Antibiotic therapy Bacteraemia Bacterial infections Clinical trials Treatment outcome |
Rights: | © 2016 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.cmi.2016.10.023 |
Grant ID: | http://purl.org/au-research/grants/nhmrc/1044941 |
Published version: | http://dx.doi.org/10.1016/j.cmi.2016.10.023 |
Appears in Collections: | Aurora harvest 8 Molecular and Biomedical Science publications |
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