Abstract
We measured ST3Gal, ST6Gal, ST6GalNAc and ST8Sia expression in human hepatic carcinoma cell lines, HepG-2 and SMMC-7721 and normal hepatic cell line, L-02 to reveal the relationship between hepatic carcinoma cell lines sialyltransferases expression and cell membrane sialic acid sugar chains. Membrane sialic acid sugar chains in L-02, HepG-2 and SMMC-7721 cell lines were measured with lectin microarrays to find expression profiles. Expression of 20 sialyltransferases was measured with DNA microarray. qRT-PCR and Western blot were used to verify DNA microarrays data. Siaα 2-3Galβ1-3[Siaα2-6GalNAc]α-R and Siaα 2-6Gal/GalNAc sugar chains in hepatic carcinoma cell lines, HepG-2 and SMMC-7721 were upregulated, and 7differentially expressed sialyltransferases were captured. ST3Gal-IV and ST6Gal I were overexpressed and ST3Gal-I, ST3Gal-V, ST3Gal-VI, ST6GalNAcII and ST6GalNAcVI were downregulated in HepG-2 and SMMC-7721 cell Lines, compared with control cell line. ST6GalNAc-IV and ST8sia expressions were not detected. Other sialyltransferases were not different among cell lines. Results from qRT-PCR and Western blot were consistent with DNA microarray. Overexpression of ST3Gal-IV and ST6Gal I in HepG-2 and SMMC-7721 cell lines may correlate with upregulation of Siaα 2-3Galβ1-3[Siaα2-6GalNAc]α-R and Siaα 2-6Gal/GalNAc sugar chains on cell membranes.
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Acknowledgments
We are grateful to Professor Qun He for her assistance in this work. This work was supported by a grant from the National Natural Science Foundation of China (awarded to Qun He, Grant No. 20672144). We thank LetPub (www.letpub.com) for their linguistic assistance during the preparation of this manuscript.
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This work was supported by a grant from the National Natural Science Foundation of China (awarded to Qun He, Grant No. 20672144).
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This work was supported by a grant from the National Natural Science Foundation of China (awarded to Qun He, Grant No. 20672144).
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Zhang, Y., Zhao, W., Zhao, Y. et al. Expression of ST3Gal, ST6Gal, ST6GalNAc and ST8Sia in human hepatic carcinoma cell lines, HepG-2 and SMMC-7721 and normal hepatic cell line, L-02. Glycoconj J 32, 39–47 (2015). https://doi.org/10.1007/s10719-014-9569-z
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DOI: https://doi.org/10.1007/s10719-014-9569-z
Key words
- Hepatic carcinoma
- Sialic acid sugar chain
- Sialyltransferase
- Lectin microarray
- DNA microarray