Highly sialylated mucin-type glycopeptide from porcine intestinal mucosa after heparin extraction: O-glycan profiling and immunological activity evaluation

Mucins are the major proteins that distributed on the intestinal mucosa layer and protect the intestine from pathogens infection. The composition of intestinal mucin O -glycans can affect the health of the gastrointestinal tract in pigs. Porcine intestinal mucosa is widely used as the main raw mater...

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Veröffentlicht in:Glycoconjugate journal 2021-10, Vol.38 (5), p.527-537
Hauptverfasser: Zhang, Xin, Wang, Chen, Han, Qing, Chen, Xuan, Li, Guoyun, Yu, Guangli
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container_title Glycoconjugate journal
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creator Zhang, Xin
Wang, Chen
Han, Qing
Chen, Xuan
Li, Guoyun
Yu, Guangli
description Mucins are the major proteins that distributed on the intestinal mucosa layer and protect the intestine from pathogens infection. The composition of intestinal mucin O -glycans can affect the health of the gastrointestinal tract in pigs. Porcine intestinal mucosa is widely used as the main raw material of heparin extraction. The heparin extraction residues rich in mucins were usually wasted. The structure of mucin derived O -glycans in porcine intestinal mucosa are currently unknown. In this study, we isolated the mucins from the heparin extraction residues and profiled the O -glycans. After heparin extraction, mucin was digested with trypsin, and separated by strong anion exchange chromatography. The mucin derived O -glycans were release by alkaline β elimination, and analyzed by ultra high performance liquid chromatography-porous graphitized carbon-Fourier transform mass spectrometry (UPLC-PGC-FTMS/MS). Thirty five kinds of O -glycans were identified, most of which were Core 3-derived glycans. In particular, the O -glycans containing sialic acid Neu5Ac accounted for 71.93% of the total O -glycans, which were different from that of other species, including mouse intestine, fish intestine, and porcine colon. The high content sialylated mucin may explain its effect in biological processes. Furthermore, the immunological activity results indicated that the porcine intestinal mucin could promote phagocytosis and proliferation without any cytotoxic effects, which may aid in the development of immunomodulators.
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source MEDLINE; Springer Nature - Complete Springer Journals
subjects Animals
Antibiotics
Anticoagulants
Biochemistry
Biomedical and Life Sciences
Chromatography
Cytotoxicity
Fourier transforms
Gastrointestinal tract
Glycopeptides
Heparin
Heparin - chemistry
Heparin - metabolism
High-performance liquid chromatography
Immunology
Immunomodulation
Intestinal Mucosa - chemistry
Intestinal Mucosa - metabolism
Intestine
Life Sciences
Macrophages - drug effects
Macrophages - immunology
Mass spectroscopy
Mice
Mucin
Mucins - chemistry
Mucins - pharmacology
Mucosa
Original Article
Pathology
Phagocytosis
Polysaccharides
RAW 264.7 Cells
Swine
Trypsin
title Highly sialylated mucin-type glycopeptide from porcine intestinal mucosa after heparin extraction: O-glycan profiling and immunological activity evaluation
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