| Title: | The potential of volatile organic compounds for the detection of active disease in patients with ulcerative colitis |
| Author(s): | Smolinska A; Bodelier AG; Dallinga JW; Masclee AA; Jonkers DM; van Schooten FJ; Pierik MJ; |
| Address: | "Department of Pharmacology and Toxicology, NUTRIM School for Nutrition, and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands. Department of Gastroenterology and Hepatology, NUTRIM School for Nutrition, and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands. Department of Gastroenterology, Amphia Hospital, Breda, The Netherlands" |
| ISSN/ISBN: | 1365-2036 (Electronic) 0269-2813 (Linking) |
| Abstract: | "BACKGROUND: To optimise treatment of ulcerative colitis (UC), patients need repeated assessment of mucosal inflammation. Current non-invasive biomarkers and clinical activity indices do not accurately reflect disease activity in all patients and cannot discriminate UC from non-UC colitis. Volatile organic compounds (VOCs) in exhaled air could be predictive of active disease or remission in Crohn's disease. AIM: To investigate whether VOCs are able to differentiate between active UC, UC in remission and non-UC colitis. METHODS: UC patients participated in a 1-year study. Clinical activity index, blood, faecal and breath samples were collected at each out-patient visit. Patients with clear defined active faecal calprotectin >250 mug/g and inactive disease (Simple Clinical Colitis Activity Index <3, C-reactive protein <5 mg/L and faecal calprotectin <100 mug/g) were included for cross-sectional analysis. Non-UC colitis was confirmed by stool culture or radiological evaluation. Breath samples were analysed by gas chromatography time-of-flight mass spectrometry and kernel-based method to identify discriminating VOCs. RESULTS: In total, 72 UC (132 breath samples; 62 active; 70 remission) and 22 non-UC-colitis patients (22 samples) were included. Eleven VOCs predicted active vs. inactive UC in an independent internal validation set with 92% sensitivity and 77% specificity (AUC 0.94). Non-UC colitis patients could be clearly separated from active and inactive UC patients with principal component analysis. CONCLUSIONS: Volatile organic compounds can accurately distinguish active disease from remission in UC and profiles in UC are clearly different from profiles in non-UC colitis patients. VOCs have demonstrated potential as new non-invasive biomarker to monitor inflammation in UC" |
| Keywords: | "Adult Aged Aged, 80 and over Biomarkers/analysis Breath Tests C-Reactive Protein/analysis Colitis/blood/*diagnosis Cross-Sectional Studies Feces/chemistry Female Gas Chromatography-Mass Spectrometry Humans Leukocyte L1 Antigen Complex/analysis Male Middle;" |
| Notes: | "MedlineSmolinska, A Bodelier, A G L Dallinga, J W Masclee, A A M Jonkers, D M van Schooten, F-J Pierik, M J eng England 2017/02/28 Aliment Pharmacol Ther. 2017 May; 45(9):1244-1254. doi: 10.1111/apt.14004. Epub 2017 Feb 26" |
