On-line breath analysis using secondary electrospray ionization coupled to high-resolution mass spectrometry (SESI-HRMS) is a sensitive method for biomarker discovery. The strengths of this technology have already been demonstrated in the clinical environment. For the first time, this study demonstrates the application of SESI-HRMS in the field of nutritional science using a standardized nutritional intervention, consisting of a high-energy shake (950 kcal, 8% protein, 35% sugar and 57% fat). Eleven subjects underwent the intervention on three separate days and their exhaled breath was monitored up to six hours postprandially. In addition, sampling was performed during equivalent fasting conditions for selected subjects. To estimate the impact of inter- and intra-individual variability, analysis of variance simultaneous component analysis was conducted, revealing that the inter-individual variability accounted for 30% of the data variation. To distinguish the effect of the intervention from fasting conditions, partial least squares discriminant analysis was performed. Candidate compound annotation was performed with pathway analysis and collision-induced dissociation (CID) experiments. Pathway analysis highlighted, among others, features associated with the metabolism of linoleate, butanoate and amino sugars. Tentative compounds annotated through CID measurements include fatty acids, amino acids, and amino acid derivatives, some of them likely derived from nutrients by the gut microbiome (e.g. propanoate, indoles), as well as organic acids from the Krebs cycle. Time-series clustering showed an overlap of observed kinetic trends with those reported previously in blood plasma.
Wüthrich C., de Figueiredo M., Pimentel K. J., Vergères G., Wahl F., Zenobi R., Giannoukos S.
Breath response following a nutritional challenge monitored by secondary electrospray ionization high-resolution mass spectrometry.
Journal of Breath Research, 16, (4), 2022, 1-12.
Download englisch (2553 kB)
ISSN Print: 1752-7155
ISSN Online: 1752-7163
Digital Object Identifier (DOI): https://doi.org/10.1088/1752-7163/ac894e
Publikations-ID (Webcode): 51942 Per E-Mail versenden
Precedenti progetti