Abstract
Objective and design
The carbohydrate moieties of glycoprotein are associated with some inflammatory diseases by affecting a wide range of biological functions of cells. This study aimed to investigate the role of β-1,4-galactosyltransferase-I (β-1,4-GalT-I) in adhesion of Schwann cells during inflammation.
Subjects
A rat Schwann cell line, RSC 96 was used.
Methods
We used western blotting to detect the expression of β-1,4-GalT-I. Flow cytomety was used to measure the galactosylation of glycoproteins on cell surfaces. Immunofluorescent staining was used to examine the expression of α6 integrin, focal adhesion kinase (FAK) and F-actin. Tyrosine phosphorylation of FAK was detected by immunoprecipitation. An adhesion assay was performed to investigate the adhesion of Schwann cells. One-way ANOVA was used to compare differences between the operated and the control group.
Results
Schwann cell adhesion was induced by LPS stimulation and was accompanied by upregulation of β-1,4-GalT-I expression and galactosylation of glycoproteins. There was a change of localization of FAK and cytoskeleton organization in LPS treated cells compared with control cells. The pretreated cells enhanced tyrosine phosphorylation of FAK compared with control cells in the adhesion process. With the increased cell surface expression of α6 integrin and β-1,4-GalT-I, the adhesion of Schwann cells on laminin was increased as well.
Conclusions
These results suggested that β-1,4-GalT-I may play an important role in adhesion of Schwann cells during inflammation.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 30770488, No. 30870320, No. 31070723, and No. 81070275); Natural Science Foundation of Jiangsu province (No. BK2009156, No. BK2009157, No. BK2009161 and No. BK2010169).
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Responsible Editor: Graham Wallace.
L. Hu and H. Yang contributed equally to this work
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11_2010_251_MOESM1_ESM.tif
The expression of FAK was not upregulated by LPS. Schwann cells treated by 1 μg/ml LPS for 6 h, western blotting analysis showed there was no upregulation of FAK compared with normal one. (tif 1.33 Mb)
11_2010_251_MOESM2_ESM.tif
Galactosylation of integrin α6 expressed on Schwann cells. Integrin α6 was immunoprecipitated and then blotted by RCA-I. “No Ab” means no integrin α6 was added during immunoprecipitation but beads alone. (tif 578 kb)
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Hu, L., Yang, H., Chen, J. et al. β-1,4-Galactosyltransferase-involved in lipopolysaccharide-induced adhesion of schwann cells. Inflamm. Res. 60, 169–174 (2011). https://doi.org/10.1007/s00011-010-0251-z
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DOI: https://doi.org/10.1007/s00011-010-0251-z