Journal
TALANTA
Volume 180, Issue -, Pages 54-60Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2017.12.037
Keywords
Magnetic graphene oxide; Click chemistry; SI-ATRP; Boronate affinity; Glycoprotein enrichment
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Funding
- National Natural Science Foundation of China [21475067]
- Natural Science Foundation of Tianjin [15JCYBJC20600]
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An efficient glycoproteins enrichment platform is one of vital preprocessing steps in biomarker research and in particular glycoproteomics. In this work, a well-defined boronic acid functionalized magnetic graphene oxide nanocomposite (Fe3O4-GO@PAAPBA) was synthesized for the selective enrichment of glycoproteins from complex biological samples via a novel strategy based on the thiol-ene click chemistry and surface initiated atom transfer radical polymerization (SI-ATRP). The initiator of ATRP was anchored to the surface of substrate through thiol-ene click reaction. The product Fe3O4-GO@PAAPBA was successfully synthesized in following SI-ATRP. The Fe3O4-GO@PAAPBA nanocomposite was characterized by transmission electron microscopy (TEM), Fourier transform-infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometry (VSM) and thermogravimetric analysis. The adsorption capacity of Fe3O4-GO@PAAPBA towards ovalbumin (OVA) and transferrin (Trf) is 471 mg g(-1) and 450 mg g(-1), respectively. The nanocomposite also featured good selectivity to glycoproteins in the mixture of glycoproteins and non-glycoproteins at alkaline (pH 9.0) and physiological conditions (pH 7.4). Furthermore, it can be applied to extract glycoproteins directly from egg white samples. These results have indicated that Fe3O4-GO@PAAPBA was a potential affinity material in glycoprotein analysis.
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