Metabolomic stability of exercise-induced sweat

Sean W. Harshman, Rhonda L. Pitsch, Nicole M. Schaeublin, Zachary K. Smith, Kraig E. Strayer, Mandy S. Phelps, Anthony V. Qualley, Daniel W. Cowan, Sharon D. Rose, Maegan L. O'Connor, Jason J. Eckerle, T. Das, Aron K. Barbey, Adam J. Strang, Jennifer A. Martin

Research output: Contribution to journalArticle

Abstract

Due to increased interest in the use of excreted sweat for biomarker discovery, data must be generated supporting sample collection and handling methods to allow for controlled, large-scale biomarker discovery studies to be performed. In this manuscript, twelve amino acids were quantitated from exercise-induced excreted sweat held at room temperature or a simulated body temperature of 37 °C for up to 90 min. The data illustrate a large dynamic range exists among amino acids in sweat. Additionally, the amino acid quantities vary across individuals and among the same individual under different storage conditions, with alanine, arginine, and threonine showing a significant statistical difference between sampling events (p < 0.05). Furthermore, the results establish amino acids are relatively invariant, at both storage temperatures tested, for up to 90 min illustrated by <10% (15/156) of the amino acids measurements demonstrating change greater than 10% from the time zero value. An untargeted metabolomics approach was also applied to the data set to evaluate global changes to the metabolome. The results show more than 88% of all data points fall within the established limits, regardless of temperature condition and ionization mode. Collectively, this study demonstrates that sweat is largely invariant at two distinct temperatures for up to 90 min. These results establish sweat collection and sample handling is possible for up to 90 min with minimal changes in metabolite abundances.

Original languageEnglish (US)
Article number121763
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Volume1126-1127
DOIs
StatePublished - Sep 15 2019

Keywords

  • Exercise
  • HILIC
  • LC-MS
  • Metabolomics
  • Sample preparation
  • Sweat

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Clinical Biochemistry
  • Cell Biology

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  • Cite this

    Harshman, S. W., Pitsch, R. L., Schaeublin, N. M., Smith, Z. K., Strayer, K. E., Phelps, M. S., Qualley, A. V., Cowan, D. W., Rose, S. D., O'Connor, M. L., Eckerle, J. J., Das, T., Barbey, A. K., Strang, A. J., & Martin, J. A. (2019). Metabolomic stability of exercise-induced sweat. Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences, 1126-1127, [121763]. https://doi.org/10.1016/j.jchromb.2019.121763