A relationship between Pseudomonal growth behaviour and cystic fibrosis patient lung function identified in a metabolomic investigation

Justyna Kozlowska, Damian W. Rivett, Louic S. Vermeer, Mary P. Carroll, Kenneth D. Bruce, A. James Mason, Geraint B. Rogers

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Chronic polymicrobial lung infections in adult cystic fibrosis patients are typically dominated by high levels of Pseudomonas aeruginosa. Determining the impact of P. aeruginosa growth on airway secretion composition is fundamental to understanding both the behaviour of this pathogen in vivo, and its relationship with other potential colonising species. We hypothesised that the marked differences in the phenotypes of clinical isolates would be reflected in the metabolite composition of spent culture media. 1H NMR spectroscopy was used to characterise the impact of P. aeruginosa growth on a synthetic medium as part of an in vitro CF lower airways model system. Comparisons of 15 CF clinical isolates were made and four distinct metabolomic clusters identified. Highly significant relationships between P. aeruginosa isolate cluster membership and both patient lung function (FEV1) and spent culture pH were identified. This link between clinical isolate growth behaviour and FEV1 indicates characterisation of P. aeruginosa growth may find application in predicting patient lung function while the significant divergence in metabolite production and consumption observed between CF clinical isolates suggests dominant isolate characteristics have the potential to play both a selective role in microbiota composition and influence pseudomonal behaviour in vivo.

Original languageEnglish
Pages (from-to)1262-1273
Number of pages12
JournalMetabolomics
Volume9
Issue number6
DOIs
Publication statusPublished or Issued - Dec 2013

Keywords

  • Cystic fibrosis
  • Lung function
  • NMR
  • Pseudomonal

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Clinical Biochemistry

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