Glycomic technology and its application in disease marker mining / 中华检验医学杂志

Changes in protein glycosylation modification have been found to be closely related to cancer and other diseases. Profiling glycosylation change has become an effective way to explore the diagnosis and treatment markers. The accuracy of quantitative technology is the key to reveal the mystery of glycosylation, and the screening and validation of glycosylation disease markers is dependant on the study of large clinical samples. Therefore, glycomic technology are expected to be simple, rapid, high-throughput, accurate and practical. In this paper, the characteristics of some commonly used glycomic analysis techniques and their applications in glycan markers are briefly discussed, and the characteristics, progress and applications of high-throughput precision glycome quantitative methods based on MALDI MS are emphasized.

Correlation between serum IgG N-glycan and Lauren classification of gastric cancer / 中华检验医学杂志

Objective:Analyze the correlation between serum immunoglobulin G (IgG) N-glycan and Lauren classification of gastric cancer.Methods:A retrospective study was performed on 17 patients with diffuse type gastric cancer and 21 patients with intestinal type who received treatment in Zhongshan Hospital from 2017 to 2018, and the general medical history data and disease characteristics were summarized. The serum IgG glycome profiles were analyzed by ultraperformance liquid chromatography, and the difference between intestinal type and diffuse type gastric cance was compared.Logistic regression was used to evaluate the correlation between serum IgG N-glycan and Lauren classification.Results:IgG N-glycome analysis included 27 directly detected glycans and 4 derived traits. H=Hexose, N=N-acetylglucosamine, F=Fucose, S=Sialic acid.There was no significant difference in IgG N-glycan among different chemotherapy protocol. Compared with intestinal type, H3N3F1 ( t=3.785, P=0.001), H3N4( t=3.919, P=0.002), H3N4F1( t=2.770, P=0.005), H3N5F1( t=2.888, P=0.010) were decreased in diffuse type; H4N4F1(6)( t=?3.488, P<0.001), H5N4F1( t=?3.401, P=0.003), H5N5F1( t=?2.303, P=0.023), H5N4F1S1 ( t=?3.068, P=0.008) were increased.H3N3F1( OR:1.20, P=0.008), H3N4( OR:1.32, P=0.005), H3N4F1 ( OR:1.13, P=0.017), H3N5F1 ( OR:1.78, P=0.015), H4N4F1(6)( OR:0.43, P=0.008), H5N4F1(6)( OR:0.74, P=0.008), H5N5F1 ( OR:0.32, P=0.036), H5N4F1S1( OR:0.48, P=0.009) were significantly correlated with Lauren classification. Sialylated ( t=?2.717, P=0.012) and galactosylated ( t=?3.400, P=0.001) IgG N-glycan were reduced in patients with intestinal type gastric cancer.Galactosylated ( OR:0.87, P=0.007) and sialylated ( OR:0.62, P=0.015) IgG N-glycan were significantly correlated with Lauren classification. Conclusion:Some IgG N-glycan are significantly correlated with Lauren classification, which can be used as potential biomarkers.

STUDIES ON THE RELATIONS OF EXPRESSION OF ?1,4- GALACTOSYLTRANSFERASE-Ⅰ AND PROLIFERATION OF SCHWANN CELLS / 解剖学报

Objective In order to study the effect of ? 1,4 GalT Ⅰ on proliferation of Schwann cells, The changes in cell proliferation were checked after Schwann cells transfected with sense or antisense ? 1,4 GalT Ⅰ plasmids. Methods Methods of counting numbers of proliferating cell and measuring [ 3H] thymidine incorporation by liquid scintillation were used to study the proliferation of purified Schwann cells which transfected with ? 1,4 GalT Ⅰ plasmids. Cell cycles of those transfected cells were determined by fluorescence activated cell sorting. Results After Schwann cells transfected with sense ? 1,4 GalT Ⅰ plasmids, the proliferation of those cells was restrained, and the number at G 1/G 0 phase of those cells increased while the number at S phase decreased. Schwann cells transfected with antisense ? 1,4 GalT Ⅰ plasmid showed opposite changes.Conclusion ? 1,4 GalT Ⅰ may play an important role in regulating the proliferation of Schwann cells in peripheral nerve.\;[