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Jackson-Jones LH, Rückerl D, Svedberg F, Duncan S, Maizels RM, Sutherland TE, Jenkins SJ, McSorley HJ, Bénézech C, MacDonald AS, Allen JE. IL-33 delivery induces serous cavity macrophage proliferation independent of interleukin-4 receptor alpha. Eur J Immunol 2017; 46:2311-2321. [PMID: 27592711 PMCID: PMC5082546 DOI: 10.1002/eji.201646442] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [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: 04/03/2016] [Revised: 07/05/2016] [Accepted: 08/29/2016] [Indexed: 12/23/2022]
Abstract
IL‐33 plays an important role in the initiation of type‐2 immune responses, as well as the enhancement of type 2 effector functions. Engagement of the IL‐33 receptor on macrophages facilitates polarization to an alternative activation state by amplifying IL‐4 and IL‐13 signaling to IL‐4Rα. IL‐4 and IL‐13 also induce macrophage proliferation but IL‐33 involvement in this process has not been rigorously evaluated. As expected, in vivo delivery of IL‐33 induced IL‐4Rα‐dependent alternative macrophage activation in the serous cavities. IL‐33 delivery also induced macrophages to proliferate but, unexpectedly, this was independent of IL‐4Rα signaling. In a filarial nematode infection model in which IL‐4Rα‐dependent alternative activation and proliferation in the pleural cavity is well described, IL‐33R was essential for alternative activation but not macrophage proliferation. Similarly, during Alternaria alternata induced airway inflammation, which provokes strong IL‐33 responses, we observed that both IL‐4Rα and IL‐33R were required for alternative activation, while macrophage proliferation in the pleural cavity was still evident in the absence of either receptor alone. Our data show that IL‐33R and IL‐4Rα promote macrophage proliferation independently of each other, but both are essential for induction of alternative activation.
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Affiliation(s)
- Lucy H Jackson-Jones
- School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FL, UK.,Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Dominik Rückerl
- School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FL, UK.,Faculty of Biology, Medicine & Health, University of Manchester, Manchester, M13 9PT, UK
| | - Freya Svedberg
- Faculty of Biology, Medicine & Health, University of Manchester, Manchester, M13 9PT, UK
| | - Sheelagh Duncan
- School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FL, UK
| | - Rick M Maizels
- Institute of Infection, Immunity & Inflammation, University of Glasgow, Glasgow, G12 8TA, UK
| | - Tara E Sutherland
- School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FL, UK.,Faculty of Biology, Medicine & Health, University of Manchester, Manchester, M13 9PT, UK
| | - Stephen J Jenkins
- Centre for Inflammation Research, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Henry J McSorley
- School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FL, UK.,Centre for Inflammation Research, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Cécile Bénézech
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Andrew S MacDonald
- Faculty of Biology, Medicine & Health, University of Manchester, Manchester, M13 9PT, UK
| | - Judith E Allen
- School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FL, UK. .,Faculty of Biology, Medicine & Health, University of Manchester, Manchester, M13 9PT, UK.
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