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SHR Neuro Cancer Cardio Lipid Metab Microb
Dieplinger, B; Egger, M; Gabriel, C; Poelz, W; Morandell, E; Seeber, B; Kronenberg, F; Haltmayer, M; Mueller, T; Dieplinger, H.
Analytical characterization and clinical evaluation of an enzyme-linked immunosorbent assay for measurement of afamin in human plasma.
Clin Chim Acta. 2013; 425(11): 236-241.
Doi: 10.1016/j.cca.2013.08.016
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- Co-authors Med Uni Graz
- GABRIEL Christian
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- Abstract:
- Comparative proteomics has recently identified afamin, the newest member of the albumin gene family, as a potential biomarker for ovarian cancer. The aim of this study was the analytical and clinical evaluation of a sandwich enzyme-linked immunosorbent assay for the determination of afamin in human plasma. We evaluated precision, linearity, and detection limit of the assay, analyte stability and biological variability, determined reference values and quantified afamin concentrations in various diseases. Within-run and total coefficients of variation were <10%. The method was linear across the tested measurement range. Detection limit was 7 mg/L for the assay. The analyte was stable for 24 h at room temperature, for 48 h at 4°C, and for at least one year at -20°C and -80°C. The reference change value for healthy individuals was 24%. Age- and sex-independent reference values in healthy blood donors were 45-99 mg/L (median 68 mg/L). In the clinical assay evaluation afamin plasma concentrations were modestly decreased in patients with heart failure. Patients with pneumonia or sepsis exhibited markedly decreased afamin plasma concentrations. However, patients with chronic renal disease or chronic obstructive pulmonary disease showed no difference in afamin plasma concentrations as compared to healthy individuals. Correlation analyses revealed an inverse association between afamin and inflammatory biomarkers. The afamin assay meets quality specifications for laboratory medicine. The results of the clinical assay evaluation revealed novel insights with respect to afamin as a potential negative acute phase protein and should encourage further studies. © 2013.
- Find related publications in this database (using NLM MeSH Indexing)
- Acute-Phase Proteins - metabolism
- Adult -
- Aged -
- Aged, 80 and over -
- Biological Markers - blood
- Carrier Proteins - blood
- Enzyme-Linked Immunosorbent Assay - standards
- Female -
- Glycoproteins - blood
- Heart Failure - blood Heart Failure - diagnosis
- Humans -
- Male -
- Middle Aged -
- Pneumonia, Bacterial - blood Pneumonia, Bacterial - diagnosis
- Pulmonary Disease, Chronic Obstructive - blood Pulmonary Disease, Chronic Obstructive - diagnosis
- Reference Values -
- Renal Insufficiency, Chronic - blood Renal Insufficiency, Chronic - diagnosis
- Reproducibility of Results -
- Sensitivity and Specificity -
- Sepsis - blood Sepsis - diagnosis
- Serum Albumin -
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