NMR HRMAS spectroscopy of lung biopsy samples: Comparison study between human, pig, rat, and mouse metabolomics

• Published in: Magnetic resonance in medicine 2014-01, Vol.71 (1), p.35-43
• Main Authors: Benahmed, Malika A., Elbayed, Karim, Daubeuf, François, Santelmo, Nicola, Frossard, Nelly, Namer, Izzie J.
• Format: Article
• Language: English
• Subjects: Aged; Aged, 80 and over; Animal models; Animals; Biopsy; Female; Humans; lung; Lung - metabolism; Lung - pathology; Magnetic Resonance Spectroscopy - methods; Male; Metabolome - physiology; metabolomics; Mice - metabolism; Mice, Inbred BALB C; Middle Aged; NMR HRMAS; Rats - metabolism; Rats, Wistar; Reproducibility of Results; Sensitivity and Specificity; Species Specificity; Swine - metabolism
• ISSN: 0740-3194; 1522-2594
• DOI: 10.1002/mrm.24658

Purpose Using the metabolomics by NMR high‐resolution magic angle spinning spectroscopy, we assessed the lung metabolome of various animal species in order to identify the animal model that could be substituted to human lung in studies on fresh lung biopsies. Methods The experiments were conducted on intact lung biopsy samples of pig, rat, mouse, and human using a Bruker Advance III 500 spectrometer. Thirty‐five to 39 metabolites were identified and 23 metabolites were quantified. Principal component analysis, partial least‐squares discriminant analysis, and analysis of variance tests were performed in order to compare the metabolic profiles of each animal lung biopsies to those of the human lung. Results The metabolic composition between human and pig lung was similar. However, human lung was distinguishable from mouse and rat regarding: Trimethylamine N‐oxide and betaïne which were present in rodents but not in human lung, carnitine, and glycerophosphocholine which were present in mouse but not in human lung. Conversely, succinic acid was undetected in rat lung. Furthermore, fatty acids concentration was significantly higher in rodent lungs compared to human lung. Conclusion Using the metabolomics by NMR high‐resolution magic angle spinning spectroscopy on lung biopsy, samples allowed to highlight that pig lung seems to be close to human lung as regarding its metabolite composition with more similarities than dissimilarities. Magn Reson Med 71:35–43, 2014. © 2013 Wiley Periodicals, Inc.