Abstract
Fibrinogen (FIB) is a secretory glycoprotein synthesized by hepatocytes that has a key role in blood clotting. Its glycosylation has not been studied in detail and little is known about the biological variability of FIB N-glycosylation, mainly due to the lack of fast, simple, and robust approaches to purify FIB from blood plasma samples. In recent years, customised chromatographic monoliths have been used for a variety of biological applications due to their unique characteristics. Here we describe development and optimisation of monolithic supports bearing monoclonal anti-human fibrinogen antibodies in a single column as well as in multi-well plate formats with high FIB specificity and binding capacity for fast immunoaffinity purification of FIB from human blood samples. The developed semi-high-throughput workflow has been successfully applied for FIB immunoaffinity isolation and subsequent ultra performance liquid chromatography N-glycosylation analysis in ten healthy human individuals, demonstrating the potential of monolithic supports in glycomics studies.
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