The Dutch Biomarker Development Center (BDC) is an initiative of the University of Groningen (RUG), the University Medical Center Groningen (UMCG), the Erasmus Medical Center Rotterdam (EMC), the Radboud University Medical Center Nijmegen (RUMC) and Netherlands Organisation for Applied Scientific Research (TNO). The BDC focuses on biomarker verification and validation in a multi-centric setting involving technology-oriented and clinical centers. The major disease areas are Chronic Obstructive Pulmonary Disease (COPD), Diabetes Type II and Alzheimer’s Disease.
Groningen researchers identify acute exposure to cigarette smoke as critical preanalytical factor when measuring sRAGE in serum
In a study comparing the effect of smoking three research cigarettes 2 hours prior to sampling, BDC researchers at the University of Groningen show that sRAGE may be decreased by as much as 50%. This effect lasts for at least 24 hours. This critical preanalytical factor, which has so far not been considered in studies on sRAGE as a COPD biomarker, may explain why studies relating sRAGE levels to lung function decline and emphysema development show certain inconsistencies. Taking acute smoke exposure into account may improve reliability of sRAGE as a biomarker. The work has been published in the American Journal of Respiratory Disease and Critical Care Medicine. Read the article here. (Posted on 07 January, 2019)
LC-MS method to quantify sRAGE without the use of affinity ligands
BDC researchers at the University of Groningen have developed a validated LC-MS method to quantify the COPD biomarker sRAGE in serum. The method is based on sRAGE enrichment by strong cation-exchange (SCX) solid-phase extraction (SPE) at pH 10. This is the first time that sRAGE has been quantified in serum without the use of affinity ligands, such as antibodies. It is of interest to note that a comparison of four validated bioanalytical methods (one ELISA and three LC-MS methods) shows a bias with the SCX-SPE-based method giving the highest concentrations. The work has been published in the Analytica Chimica Acta. Read the article here. (Posted on 07 January, 2019)