Metabolomics

, Volume 9, Issue 5, pp 1073–1081

Patterns of time since last meal revealed by sparse PCA in an observational LC–MS based metabolomics study

  • Gözde Gürdeniz
  • Louise Hansen
  • Morten Arendt Rasmussen
  • Evrim Acar
  • Anja Olsen
  • Jane Christensen
  • Thaer Barri
  • Anne Tjønneland
  • Lars Ove Dragsted
Original Article

DOI: 10.1007/s11306-013-0525-x

Cite this article as:
Gürdeniz, G., Hansen, L., Rasmussen, M.A. et al. Metabolomics (2013) 9: 1073. doi:10.1007/s11306-013-0525-x

Abstract

In metabolomics studies, liquid chromatography mass spectrometry (LC–MS) provides comprehensive information on biological samples. However, extraction of few relevant metabolites from this large and complex data is cumbersome. To resolve this issue, we have employed sparse principal component analysis (SPCA) to capture the underlying patterns and select relevant metabolites from LC–MS plasma profiles. The study involves a small pilot cohort with 270 subjects where each subject’s time since last meal (TSLM) has been recorded prior to plasma sampling. Our results have demonstrated that both PCA and SPCA can capture the TSLM patterns. Nevertheless, SPCA provides more easily interpretable loadings in terms of selection of relevant metabolites, which are identified as amino acids and lyso-lipids. This study demonstrates the utility of SPCA as a pattern recognition and variable selection tool in metabolomics. Furthermore, amino acids and lyso-lipids are determined as dominating compounds in response to TSLM.

Keywords

Metabolomics SPCA LC–MS Plasma Time since last meal Observational study 

Supplementary material

11306_2013_525_MOESM1_ESM.docx (266 kb)
Supplementary material 1 (DOCX 265 kb)

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Gözde Gürdeniz
    • 1
  • Louise Hansen
    • 2
  • Morten Arendt Rasmussen
    • 3
  • Evrim Acar
    • 3
  • Anja Olsen
    • 2
  • Jane Christensen
    • 2
  • Thaer Barri
    • 1
  • Anne Tjønneland
    • 2
  • Lars Ove Dragsted
    • 1
  1. 1.Department of Nutrition, Exercise and Sports, Faculty of ScienceUniversity of CopenhagenFrederiksberg CDenmark
  2. 2.Danish Cancer Society Research CenterCopenhagenDenmark
  3. 3.Department of Food Science, Faculty of Life SciencesUniversity of CopenhagenFrederiksberg CDenmark

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