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Open Access Green as soon as Postprint is submitted to ZB.
Stability and reproducibility of simultaneously detected plasma and serum cytokine levels in asymptomatic subjects.
Biomarkers 15, 140-148 (2010)
Blood levels of cyto- and chemokines might reflect immune deregulations which might be related to lymphomagenesis. Potential utility of stored blood samples of a prospective cohort was evaluated by the effect of different blood sample types and freeze-thaw cycles on analyte levels. Bead-based immunoassays were performed on two fresh samples (serum, citrate and heparin plasma) of 10 asymptomatic adults collected 14 days apart and on aliquots of the first samples which were put through one to three freeze-thaw cycles to measure 11 cytokines, four chemokines and two adhesion molecules. Median coefficients of variation (CVs) of the measured analytes were 20%, 24% and 32% in serum, citrate and heparin plasma, respectively. Strong correlations (rank correlation coefficient 0.74-0.98) were observed between sample types, although small differences in analyte levels were observed for most analytes. Freeze-thaw cycles did not markedly change analyte levels. Our study supports the use of this assay among asymptomatic subjects in epidemiological studies.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Cytokine; Freeze-thaw cycle; Reproducibility
ISSN (print) / ISBN
1354-750X
e-ISSN
1366-5804
Journal
Biomarkers
Quellenangaben
Volume: 15,
Issue: 2,
Pages: 140-148
Publisher
Informa Healthcare
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Epidemiology (EPI)