Anaerobiosis influences virulence properties of Pseudomonas aeruginosa cystic fibrosis isolates and the interaction with Staphylococcus aureus


The airways of individuals with cystic fibrosis (CF) are abundantly colonised by Staphylococcus aureus and Pseudomonas aeruginosa. Co-infecting hypoxic regions of static mucus within CF airways, together with decreases in pulmonary function, mucus plugging and oxygen consumption by host neutrophils gives rise to regions of anoxia. This study determined the impact of anaerobiosis upon S. aureus-P. aeruginosa interactions in planktonic co-culture and mixed species biofilms in vitro. Whilst anoxia reduced the ability for P. aeruginosa CF isolates to dominate over S. aureus, this occurred in an isolate dependent manner. Investigations into the underlying mechanisms suggest that the anti-staphylococcal compound facilitating P. aeruginosa dominance under normoxia and anoxia is greater than 3 kDa in size and is heat-stable. Not all interspecies interactions studied were antagonistic, as S. aureus exoproducts were shown to restore and enhance P. aeruginosa motility under normoxia and anoxia in an isolate dependent manner. Collectively, this study suggests changes in oxygen availability within regions of the CF lung is likely to influence interspecies interactions and in turn, potentially influence disease progression.

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Divisions: College of Health & Life Sciences > School of Biosciences
College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
College of Health & Life Sciences > School of Biosciences > Cell & Tissue Biomedical Research
College of Health & Life Sciences > Chronic and Communicable Conditions
College of Health & Life Sciences
College of Health & Life Sciences > School of Biosciences > Cellular and Molecular Biomedicine
Additional Information: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit Funding: We gratefully acknowledge the Humane Research Trust for funding LJM and RP for this research. We also acknowledge support for IM and AD from BBSRC (BB/M006298/1).
Uncontrolled Keywords: General
Publication ISSN: 2045-2322
Last Modified: 17 Jun 2024 07:40
Date Deposited: 19 Aug 2019 09:39
Full Text Link:
Related URLs: http://www.natu ... 598-019-42952-x (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2019-05-01
Accepted Date: 2019-04-03
Authors: Pallett, Ross
Leslie, Laura J. (ORCID Profile 0000-0002-7925-9589)
Lambert, Peter. A. (ORCID Profile 0000-0002-8243-2741)
Milic, Ivana (ORCID Profile 0000-0001-7531-7561)
Devitt, Andrew (ORCID Profile 0000-0002-4651-6761)
Marshall, Lindsay J. (ORCID Profile 0000-0001-7281-7974)



Version: Published Version

License: Creative Commons Attribution

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