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Mass spectrometry analysis of mixed breath, isolated bronchial breath and gastric endoluminal volatile fatty acids in oesophagogastric cancer Mina E Adam, Matyas Fehervari, Piers R Boshier, Sung-Tong Chin, Geng-Ping Lin, Andrea Romano, Sacheen Kumar, and George B Hanna Anal. Chem., Just Accepted Manuscript • DOI: 10.1021/acs.analchem.9b00148 • Publication Date (Web): 30 Jan 2019 Downloaded from http://pubs.acs.org on January 31, 2019
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Analytical Chemistry
Title: Mass spectrometry analysis of mixed breath, isolated bronchial breath
and
gastric
endoluminal
volatile
fatty
acids
in
oesophagogastric cancer Mina E Adam1*, Matyas Fehervari1*, Piers R Boshier1, Sung‐Tong Chin1, Geng‐Ping Lin1,, Andrea Romano1, Sacheen Kumar1,2, George B Hanna1 1
Department of Surgery & Cancer, Imperial College London, United Kingdom
2
Department of Upper Gastrointestinal Surgery, The Royal Marsden Hospital, United
Kingdom *
These authors contributed equally to experimental work and preparation of the
manuscript Corresponding Author Professor George Hanna, Department of Surgery and Cancer, Imperial College London, 10th Floor QEQM Building, St Mary’s Hospital, London, W2 1NY UK E‐mail:
[email protected] Telephone No: +44 (0)207 886 2125 Fax No: +44 (0)207 8862125
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Abstract A non‐invasive breath test has the potential to improve survival from oesophagogastric cancer by facilitating earlier detection. This study aimed to investigate production of target volatile fatty acids (VFAs) in oesophagogastric cancer through analysis of ex vivo headspace above un‐derivatised tissues and in vivo analysis within defined anatomical compartments including mixed breath, isolated bronchial breath and gastric endoluminal air. VFAs were measured by PTR‐ ToF‐MS and GC‐MS. Levels of VFAs (acetic‐, butyric‐, pentanoic‐ and hexanoic‐acid) and acetone were elevated in ex‐vivo experiments in the headspace above oesophagogastric cancer compared to samples from control subjects with morphologically normal and benign conditions of the upper gastrointestinal tract. In 25 patients with oesophagogastric cancer and 20 control subjects, receiver operating characteristic analysis for cancer specific VFAs butyric acid (P
