| Title: | Analytical methodologies for broad metabolite coverage of exhaled breath condensate |
| Author(s): | Aksenov AA; Zamuruyev KO; Pasamontes A; Brown JF; Schivo M; Foutouhi S; Weimer BC; Kenyon NJ; Davis CE; |
| Address: | "Mechanical and Aerospace Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA. Department of Internal Medicine, 4150 V Street, Suite 3400, University of California, Davis, Sacramento, CA 95817, USA; Center for Comparative Respiratory Biology and Medicine, University of California, Davis, CA 95616, USA. School of Veterinary Medicine,1089 Veterinary Medicine Drive, University of California, Davis, Davis, CA 95616, USA. Mechanical and Aerospace Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA. Electronic address: cedavis@ucdavis.edu" |
| Journal Title: | J Chromatogr B Analyt Technol Biomed Life Sci |
| DOI: | 10.1016/j.jchromb.2017.06.038 |
| ISSN/ISBN: | 1873-376X (Electronic) 1570-0232 (Print) 1570-0232 (Linking) |
| Abstract: | "Breath analysis has been gaining popularity as a non-invasive technique that is amenable to a broad range of medical uses. One of the persistent problems hampering the wide application of the breath analysis method is measurement variability of metabolite abundances stemming from differences in both sampling and analysis methodologies used in various studies. Mass spectrometry has been a method of choice for comprehensive metabolomic analysis. For the first time in the present study, we juxtapose the most commonly employed mass spectrometry-based analysis methodologies and directly compare the resultant coverages of detected compounds in exhaled breath condensate in order to guide methodology choices for exhaled breath condensate analysis studies. Four methods were explored to broaden the range of measured compounds across both the volatile and non-volatile domain. Liquid phase sampling with polyacrylate Solid-Phase MicroExtraction fiber, liquid phase extraction with a polydimethylsiloxane patch, and headspace sampling using Carboxen/Polydimethylsiloxane Solid-Phase MicroExtraction (SPME) followed by gas chromatography mass spectrometry were tested for the analysis of volatile fraction. Hydrophilic interaction liquid chromatography and reversed-phase chromatography high performance liquid chromatography mass spectrometry were used for analysis of non-volatile fraction. We found that liquid phase breath condensate extraction was notably superior compared to headspace extraction and differences in employed sorbents manifested altered metabolite coverages. The most pronounced effect was substantially enhanced metabolite capture for larger, higher-boiling compounds using polyacrylate SPME liquid phase sampling. The analysis of the non-volatile fraction of breath condensate by hydrophilic and reverse phase high performance liquid chromatography mass spectrometry indicated orthogonal metabolite coverage by these chromatography modes. We found that the metabolite coverage could be enhanced significantly with the use of organic solvent as a device rinse after breath sampling to collect the non-aqueous fraction as opposed to neat breath condensate sample. Here, we show the detected ranges of compounds in each case and provide a practical guide for methodology selection for optimal detection of specific compounds" |
| Keywords: | "Adult Breath Tests/*methods Chromatography, High Pressure Liquid/*methods Female Gas Chromatography-Mass Spectrometry/*methods Humans Male Organic Chemicals/*analysis/chemistry/isolation & purification Tandem Mass Spectrometry/*methods Young Adult Exhaled;" |
| Notes: | "MedlineAksenov, Alexander A Zamuruyev, Konstantin O Pasamontes, Alberto Brown, Joshua F Schivo, Michael Foutouhi, Soraya Weimer, Bart C Kenyon, Nicholas J Davis, Cristina E eng U01 EB022003/EB/NIBIB NIH HHS/ T32 HL007013/HL/NHLBI NIH HHS/ P42 ES004699/ES/NIEHS NIH HHS/ P30 ES023513/ES/NIEHS NIH HHS/ UG3 OD023365/OD/NIH HHS/ K23 HL127185/HL/NHLBI NIH HHS/ UL1 TR000002/TR/NCATS NIH HHS/ UH3 OD023365/OD/NIH HHS/ Netherlands 2017/07/12 J Chromatogr B Analyt Technol Biomed Life Sci. 2017 Sep 1; 1061-1062:17-25. doi: 10.1016/j.jchromb.2017.06.038. Epub 2017 Jun 27" |
