Novel detection of specific bacterial quorum sensing molecules in saliva: Potential non-invasive biomarkers for pulmonary Pseudomonas aeruginosa in cystic fibrosis
Webb, Karmel Cámara, Miguel Zain, Nur Masirah M Halliday, Nigel Bruce, Kenneth D Nash, Edward F Whitehouse, Joanna L Knox, Alan Forrester, Douglas Smyth, Alan R
Webb, Karmel
Cámara, Miguel
Zain, Nur Masirah M
Halliday, Nigel
Bruce, Kenneth D
Nash, Edward F
Whitehouse, Joanna L
Knox, Alan
Forrester, Douglas
Smyth, Alan R
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2021-09-11
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Abstract
Pseudomonas aeruginosa produces specific signalling molecules, 2-alkyl-4-quinolones (AQs) that are detectable in the sputum of adults with cystic fibrosis (CF) and who have pulmonary infection with this opportunistic pathogen. This study aimed to determine whether AQs could be detected in saliva of patients with CF and known infection with Pseudomonas aeruginosa. Saliva and sputum samples were obtained from 89 adults with CF and analyzed using liquid chromatography-tandem mass spectrometry. AQs were detected in 39/89 (43.8%) saliva samples and 70/77(90.9%) sputum samples. Salivary AQs had a sensitivity of 50% (95%CI; 37.8; 62.2), specificity of 100% (95%CI; 47.8; 100), when compared to a molecular microbiological measure of P. aeruginosa in sputum as measured using polymerase chain reaction. Specific AQs produced by P. aeruginosa can be detected in the saliva and warrant investigation as potential non-invasive biomarkers of pulmonary P. aeruginosa.
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Webb K, Cámara M, Zain NMM, Halliday N, Bruce KD, Nash EF, Whitehouse JL, Knox A, Forrester D, Smyth AR, Williams P, Fogarty A, Barr HL. Novel detection of specific bacterial quorum sensing molecules in saliva: Potential non-invasive biomarkers for pulmonary Pseudomonas aeruginosa in cystic fibrosis. J Cyst Fibros. 2022 Jul;21(4):626-629. doi: 10.1016/j.jcf.2021.08.030. Epub 2021 Sep 11
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