Abstract
In this work, poly(glycidyl methacrylate-ethyleneglycol dimethacrylate) monolith functionalized with copper tetra(N-carbonylacrylic) aminephthalocyanine and iminodiacetic acid was successfully synthesized. Owing to hydrogen bonding and hydrophilic interactions, the monolith exhibited good performance for glycopeptide enrichment. When the tryptic digests of horseradish peroxidase were enriched by the developed monolith, a total of 20 glycopeptides could be captured and identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry analysis with a detection limit as low as 0.5 fmol μL−1. With the mixture of bovine serum albumin and horseradish peroxidase digests (200:1, m/m) as the sample, 14 glycopeptides were identified after enrichment, showing the high selectivity of the monolith. Moreover, the functionalized monolith exhibited good stability and reproducibility. It was successfully applied to enrich glycopeptides from human serum, demonstrating its potential applications in selective and efficient capture of glycopeptides in complex biological samples.
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This project was supported by the National Natural Science Foundation of China (21575049).
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The use of serum samples in this experiment was approved by the Ethics Committee of the First Hospital of Jilin University (Changchun, China).
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Zhang, W., Jiang, L., Wang, D. et al. Preparation of copper tetra(N-carbonylacrylic) aminephthalocyanine functionalized zwitterionic-polymer monolith for highly specific capture of glycopeptides. Anal Bioanal Chem 410, 6653–6661 (2018). https://doi.org/10.1007/s00216-018-1278-1
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DOI: https://doi.org/10.1007/s00216-018-1278-1