期刊
ACTA BIOCHIMICA ET BIOPHYSICA SINICA
卷 46, 期 1, 页码 65-71出版社
OXFORD UNIV PRESS
DOI: 10.1093/abbs/gmt122
关键词
cordycepin; human GD3 synthase; SK-N-BE(2)-C cell; transcription factor
资金
- MOTIE/KIAT
In the present study, we firstly found that cordycepin elevated the gene expression of the human GD3 synthase (hST8Sia I) in human neuroblastoma SK-N-BE(2)-C cells. To elucidate the mechanism underlying the upregulation of hST8Sia I gene expression in cordycepin-treated SK-N-BE(C)-C cells, functional characterization of the promoter region of the hST8Sia I gene was performed. Analysis of promoter activity using varying lengths of 5'-flanking region showed a dramatic increase by cordycepin in the -1146 to -646 region, which contains putative binding sites for transcription factors c-Ets-1, CREB, AP-1, and NF-kappa B. Site-directed mutagenesis for these binding sites and chromatin immunoprecipitation assay revealed that the NF-kappa B binding site at 2731 to 2722 is essential for the cordycepin-induced expression of the hST8Sia I in SK-N-BE(2)-C cells. Moreover, the hST8Sia I expression induced by cordycepin was significantly repressed by pyrrolidinedithiocarbamate, an inhibitor of NF-kappa B. These results suggested that cordycepin induces upregulation of hST8Sia I gene expression through NF-kappa B activation in SK-N-BE(2)-C cells.
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