Selected Ion Flow Tube Mass Spectrometry Analysis of Volatile Metabolites in Urine Headspace for the Profiling of Gastro-Esophageal Cancer

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• 作者：Juzheng Huang ; Sacheen Kumar ; Nima Abbassi-Ghadi ; Patrik 艩pan臎l ; David Smith ; George B. Hanna
• 刊名：Analytical Chemistry
• 出版年：2013
• 出版时间：March 19, 2013
• 年：2013
• 卷：85
• 期：6
• 页码：3409-3416
• 全文大小：312K
• 年卷期：v.85,no.6(March 19, 2013)
• ISSN：1520-6882

文摘

Urine is considered an ideal biofluid for clinical investigation because it is obtained noninvasively and relatively large volumes are easily acquired. In this study, selected ion flow tube mass spectrometry (SIFT-MS) has been applied for the quantification of volatile organic compounds (VOCs) in the headspace vapor of urine samples, which were retrieved from three groups of patients with gastro-esophageal cancer, noncancer diseases of the upper gastro-intestinal tract, and a healthy cohort. Eleven VOCs have been investigated in this study. The concentrations of seven VOCs鈥揳cetaldehyde, acetone, acetic acid, hexanoic acid, hydrogen sulfide, methanol, and phenol鈥搘ere found to be significantly different between cancer, positive control, and healthy groups using the Kruskal鈥揥allis test. The concentrations of acetaldehyde, acetone, acetic acid, hexanoic acid, hydrogen sulfide, and methanol were increased in the cancer cohort compared with healthy controls while the concentration of phenol decreased. The differences in the concentrations of ethanol, propanol, methyl phenol, and ethyl phenol were not significant between cancer and control groups. Receiver operating characteristics (ROC) analysis was applied for a combination of six VOCs (acetaldehyde, acetone, acetic acid, hexanoic acid, hydrogen sulfide, and methanol) to discriminate cancer patients from noncancer controls. The integrated area under ROC curve is 0.904. This result indicates that VOC profiling may be suitable in identifying those at high risk of gastro-esophageal cancer. Therefore, further investigations should be undertaken to assess the potential for VOC profiling as a new screening test in gastro-esophageal cancer.