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          Institute: MPI für Herz- und Lungenforschung (W. G. Kerckhoff Institut)     Collection: Publikationen des W. G. Kerckhoff-Instituts     Display Documents



ID: 313319.0, MPI für Herz- und Lungenforschung (W. G. Kerckhoff Institut) / Publikationen des W. G. Kerckhoff-Instituts
Influence of sample type and storage conditions on soluble CD40 ligand assessment
Authors:Weber, M.; Rabenau, B.; Stanisch, M.; Elsaesser, A.; Mitrovic, V.; Heeschen, C.; Hamm, C.
Date of Publication (YYYY-MM-DD):2006-05
Title of Journal:Clin Chem
Journal Abbrev.:Clin Chem
Volume:52
Issue / Number:5
Start Page:888
End Page:891
Audience:Not Specified
Abstract / Description:BACKGROUND: Several studies have consistently shown that soluble CD40 ligand (sCD40L) concentrations are increased in patients with acute coronary syndromes and can serve as a biomarker for risk stratification. However, few data are available on preanalytic conditions that impact sCD40L values. Thus, the aim of our prospective study was to evaluate the impact of sampling techniques and storage conditions on sCD40L concentrations. METHODS: We included a total of 30 patients with no, stable, or unstable coronary heart disease. Blood samples were collected in gel-filled tubes without additives, in EDTA-filled tubes, and in citrate-filled tubes and were kept at various storage conditions. RESULTS: Median (interquartile range) sCD40L values at baseline were higher in serum samples [5.29 (3.89-6.33) microg/L] than in either EDTA plasma [0.78 (0.39-1.12) microg/L; P <0.001] or citrate plasma [0.37 (0.22-0.51) microg/L; P <0.001]. Serum values increased with delayed processing [7.94 (5.97-9.62) microg/L after 1.5 h (P <0.001) vs baseline; 10.55 (7.58-11.55) microg/L after 3 h (P <0.001) vs baseline]. However, after centrifugation, sCD40L values remained stable for all 3 sample types. CONCLUSION: Plasma, but not serum, samples are appropriate for sCD40L measurements. In general, preanalytic conditions are critical in the assessment of sCD40L concentrations and thus should be carefully considered for future studies.
Free Keywords:Biological Markers/blood *Blood Specimen Collection CD40 Ligand/*blood Coronary Disease/blood Female Humans Male Middle Aged Plasma Prospective Studies Serum Solubility
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für physiologische und klinische Forschung
Identifiers:URL:http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=...
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