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- Title
Fabrication of hydrophilic zwitterionic microspheres via inverse suspension polymerization for the enrichment of N-glycopeptides.
- Authors
Wu, Wenrui; Tang, Ruizhi; Pan, Lei; Wang, Chenyang; Zhang, Jingjing; Ma, Shujuan; Shen, Yehua; Ou, Junjie
- Abstract
A kind of zwitterionic microsphere was prepared via one-step inverse suspension polymerization employing 3-[N,N-dimethyl-[2-(2-methylpropyl-2-enyloxy) ethyl] ammonium] propane-1-sulfonate (MSA) and N,N-methylene bisacrylamide (BIS) as the precursors. The preparation conditions were carefully investigated and optimized by regulating the content of total monomers, ratio of MSA to BIS, ratio of water to oil, and content of stabilizer. The properties of microspheres were characterized by helium ion microscopy (HIM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), N2 adsorption/desorption measurement, and water contact angle measurement. The particle size of resulting polydisperse microspheres ranged from 15–25 μm, exhibiting high specific surface area of 138 m2 g−1. Owing to great hydrophilicity, the resulting zwitterionic microspheres could be directly used as hydrophilic interaction chromatography (HILIC) sorbent to enrich glycopeptides from biosamples without any chemical modification. A total of 19 N-glycopeptides was enriched from 10 μg of IgG digest. Besides, up to 383 N-glycopeptides and 224 N-glycosylation sites were unambiguously identified from 2 μL of human serum digest by cLC-MS/MS after enrichment with zwitterionic microspheres, indicating their great enrichment performance to N-glycopeptides. The approach of preparing hydrophilic zwitterionic microspheres contains only one synthesis reaction and is suitable for large-scale preparation.
- Subjects
HYDROPHILIC interaction liquid chromatography; ZWITTERIONS; POLYMERIZATION; FOURIER transform infrared spectroscopy; MICROSPHERES; X-ray photoelectron spectroscopy; FIELD ion microscopy
- Publication
Microchimica Acta, 2021, Vol 188, Issue 10, p1
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-021-05010-w