Development and validation of a multiplex add-on assay of biomarkers related to sepsis using xMAP technology
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Development and validation of a multiplex add-on assay of biomarkers related to sepsis using xMAP technology. / Kofoed, Kristian; Vest Schneider, Uffe; Scheel, Troels; Andersen, Ove; Eugen-Olsen, Jesper.
I: Clinical Chemistry, Bind 52, Nr. 7, 11.05.2006, s. 1284-93.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Development and validation of a multiplex add-on assay of biomarkers related to sepsis using xMAP technology
AU - Kofoed, Kristian
AU - Vest Schneider, Uffe
AU - Scheel, Troels
AU - Andersen, Ove
AU - Eugen-Olsen, Jesper
PY - 2006/5/11
Y1 - 2006/5/11
N2 - BACKGROUND: Sepsis is a common and often fatal disease. Because sepsis can be caused by many different organisms, biomarkers that can aid in diagnosing sepsis and monitoring treatment efficacy are highly warranted. New sepsis markers may provide additional information to complement the currently used markers. METHODS: We used a combination of in-house and commercially available multiplex immunoassays based on Luminex xMAP technology to assay biomarkers of potential interest in EDTA-plasma samples. RESULTS: A 3-plex assay for soluble urokinase plasminogen activator receptor (suPAR), soluble triggering receptor expressed on myeloid cells-1 (sTREM-1), and macrophage migration inhibiting factor (MIF) was developed and validated in-house. This 3-plex assay was added to a commercially available interleukin-1beta (IL-1beta), IL-6, IL-8, granulocyte/macrophage colony-stimulating factor, and tumor necrosis factor-alpha human cytokine panel. No cross-reactivity was observed when the assays were combined. Correlation between values obtained with the 8-plex, the 5-cytokine panel, the 3 in-house 1-plex assays, and a suPAR ELISA ranged from 0.86 to 0.99. Mean within- and between-run CVs were 8.0% and 11%, respectively. Recoveries of suPAR, sTREM-1, and MIF calibrators were 108%, 88%, and 51%, respectively. In plasma collected from 10 patients with bacterial sepsis confirmed by blood culture, the assay detected significantly increased concentrations of all 8 analytes compared with healthy controls. CONCLUSIONS: A commercially available xMAP panel can be expanded with markers of interest. The combined multiplex assay can measure the 8 analytes with high reproducibility. The xMAP technology is an appealing tool for assaying conventional cytokines in combination with new markers.
AB - BACKGROUND: Sepsis is a common and often fatal disease. Because sepsis can be caused by many different organisms, biomarkers that can aid in diagnosing sepsis and monitoring treatment efficacy are highly warranted. New sepsis markers may provide additional information to complement the currently used markers. METHODS: We used a combination of in-house and commercially available multiplex immunoassays based on Luminex xMAP technology to assay biomarkers of potential interest in EDTA-plasma samples. RESULTS: A 3-plex assay for soluble urokinase plasminogen activator receptor (suPAR), soluble triggering receptor expressed on myeloid cells-1 (sTREM-1), and macrophage migration inhibiting factor (MIF) was developed and validated in-house. This 3-plex assay was added to a commercially available interleukin-1beta (IL-1beta), IL-6, IL-8, granulocyte/macrophage colony-stimulating factor, and tumor necrosis factor-alpha human cytokine panel. No cross-reactivity was observed when the assays were combined. Correlation between values obtained with the 8-plex, the 5-cytokine panel, the 3 in-house 1-plex assays, and a suPAR ELISA ranged from 0.86 to 0.99. Mean within- and between-run CVs were 8.0% and 11%, respectively. Recoveries of suPAR, sTREM-1, and MIF calibrators were 108%, 88%, and 51%, respectively. In plasma collected from 10 patients with bacterial sepsis confirmed by blood culture, the assay detected significantly increased concentrations of all 8 analytes compared with healthy controls. CONCLUSIONS: A commercially available xMAP panel can be expanded with markers of interest. The combined multiplex assay can measure the 8 analytes with high reproducibility. The xMAP technology is an appealing tool for assaying conventional cytokines in combination with new markers.
M3 - Journal article
VL - 52
SP - 1284
EP - 1293
JO - Clinical Chemistry
JF - Clinical Chemistry
SN - 0009-9147
IS - 7
ER -
ID: 34097521