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The Impact of Delayed Storage on the Measured Proteome and Metabolome of Human Cerebrospinal Fluid

Rosenling, T., Stoop, M. P., Smolinska, A., Muilwijk, B., Coulier, L., Shi, S., Dane, A., Christin, C., Suits, F., Horvatovich, P. L., Wijmenga, S. S., Buydens, L. M. C., Vreeken, R., Hankemeier, T., van Gool, A. J., Luider, T. M. & Bischoff, R., Dec-2011, In : Clinical Chemistry. 57, 12, p. 1703-1711 9 p.

Research output: Contribution to journalArticleAcademicpeer-review

  • Therese Rosenling
  • Marcel P. Stoop
  • Agnieszka Smolinska
  • Bas Muilwijk
  • Leon Coulier
  • Shanna Shi
  • Adrie Dane
  • Christin Christin
  • Frank Suits
  • Peter L. Horvatovich
  • Sybren S. Wijmenga
  • Lutgarde M. C. Buydens
  • Rob Vreeken
  • Thomas Hankemeier
  • Alain J. van Gool
  • Theo M. Luider
  • Rainer Bischoff

BACKGROUND: Because cerebrospinal fluid (CSF) is in close contact with diseased areas in neurological disorders, it is an important source of material in the search for molecular biomarkers. However, sample handling for CSF collected from patients in a clinical setting might not always be adequate for use in proteomics and metabolomics studies.

METHODS: We left CSF for 0, 30, and 120 min at room temperature immediately after sample collection and centrifugation/removal of cells. At 2 laboratories CSF proteomes were subjected to tryptic digestion and analyzed by use of nano-liquid chromatography (LC) Orbitrap mass spectrometry (MS) and chipLC quadrupole TOF-MS. Metabolome analysis was performed at 3 laboratories by NMR, GC-MS, and LC-MS. Targeted analyses of cystatin C and albumin were performed by LC-tandem MS in the selected reaction monitoring mode.

RESULTS: We did not find significant changes in the measured proteome and metabolome of CSF stored at room temperature after centrifugation, except for 2 peptides and 1 metabolite, 2,3,4-trihydroxybutanoic (threonic) acid, of 5780 identified peptides and 93 identified metabolites. A sensitive protein stability marker, cystatin C, was not affected.

CONCLUSIONS: The measured proteome and metabolome of centrifuged human CSF is stable at room temperature for up to 2 hours. We cannot exclude, however, that changes undetectable with our current methodology, such as denaturation or proteolysis, might occur because of sample handling conditions. The stability we observed gives laboratory personnel at the collection site sufficient time to aliquot samples before freezing and storage at -80 degrees C. (C) 2011 American Association for Clinical Chemistry

Original languageEnglish
Pages (from-to)1703-1711
Number of pages9
JournalClinical Chemistry
Volume57
Issue number12
Publication statusPublished - Dec-2011

    Keywords

  • MULTIPLE-SCLEROSIS, MASS-SPECTROMETRY, LIQUID-CHROMATOGRAPHY, BIOMARKER DISCOVERY, NMR-SPECTROSCOPY, ASCORBIC-ACID, BLOOD-SERUM, CYSTATIN-C, CSF, STABILITY

ID: 5462917