The metabolomic detection of lung cancer biomarkers in sputum

Simon Cameron, Keir E. Lewis, Manfred Beckmann, Gordon Allison, Robin Ghosal, Paul D. Lewis, Luis Mur

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

59 Dyfyniadau (Scopus)
326 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

Objectives
Developing screening and diagnosis methodologies based on novel biomarkers should allow for the detection of the lung cancer (LC) and possibly at an earlier stage and thereby increase the effectiveness of clinical interventions. Here, our primary objective was to evaluate the potential of spontaneous sputum as a source of non-invasive metabolomic biomarkers for LC status.

Materials and Methods
Spontaneous sputum was collected and processed from 34 patients with suspected LC, alongside 33 healthy controls. Of the 34 patients, 23 were subsequently diagnosed with LC (LC+, 16 NSCLC, six SCLC, and one radiological diagnosis), at various stages of disease progression. The 67 samples were analysed using flow infusion electrospray ion mass spectrometry (FIE-MS) and gas-chromatography mass spectrometry (GC-MS).

Results
Principal component analysis identified negative mode FIE-MS as having the main separating power between samples from healthy and LC. Discriminatory metabolites were identified using ANOVA and Random Forest. Indications of potential diagnostic accuracy involved the use of receiver operating characteristic/area under the curve (ROC/AUC) analyses. This approach identified metabolites changes that were only observed with LC. Metabolites with AUC values of greater than 0.8 which distinguished between LC+/LC− binary classifications where identified and included Ganglioside GM1 which has previously been linked to LC.

Conclusion
This study indicates that metabolomics based on sputum can yield metabolites that can be used as a diagnostic and/or discriminator tool. These could aid clinical intervention and targeted diagnosis of LC within an ‘at risk’ LC− population group. The use of sputum as a non-invasive source of metabolite biomarkers may aid in the development of an at-risk population screening programme for lung cancer or enhanced clinical diagnostic pathways.
Iaith wreiddiolSaesneg
Tudalennau (o-i)88-95
Nifer y tudalennau8
CyfnodolynLung Cancer
Cyfrol94
Rhif cyhoeddiN/A
Dyddiad ar-lein cynnar08 Chwef 2016
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 30 Ebr 2016

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