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Upregulation of human DNA binding protein A (dbpA) in gastric cancer cells.
- Source :
-
Acta pharmacologica Sinica [Acta Pharmacol Sin] 2009 Oct; Vol. 30 (10), pp. 1436-42. Date of Electronic Publication: 2009 Sep 14. - Publication Year :
- 2009
-
Abstract
- Aim: To determine the effect of human DNA binding protein (dbpA) on the biology of gastric cancer cells.<br />Methods: DbpA expression was analyzed by Western blot analysis and immunofluorescence staining in gastric cancer tissues and cell lines. A dbpA-specific small interference (si) RNA was designed and synthesized. Suppressive effect of siRNA on dbpA expression was assessed by real-time RT-PCR. Transwell migration and colony formation assays were used to assess the inhibitory effects of dbpA siRNA on cell invasion and tumorigenesis in vitro. Drug-sensitivity was evaluated using a conventional 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay.<br />Results: The expression of dbpA was upregulated in gastric cancer tissues and cell lines as compared to adjacent normal tissues or gastric epithelial cells. siRNA treatment successfully silenced dbpA expression. Silencing of dbpA increased expression of E-cadherin, decreased expression of adenomatous polyposis coli (APC), beta-catenin and cyclin D1, but had no effect on expression of NF-kappaB. Silencing of dbpA also suppressed cell invasion and colony formation of SGC7901 cells, and enhanced their chemosensitivity to 5-fluorouracil.<br />Conclusion: DbpA plays an important role in the pathogenesis and development of gastric cancer, and the process involves E-cadherin, APC, beta-catenin and cyclin D1. Silencing of dbpA might be a novel therapeutic strategy for increasing chemosensitivity to 5-fluorouracil in gastric cancer.
- Subjects :
- Adenomatous Polyposis Coli Protein genetics
Adenomatous Polyposis Coli Protein metabolism
Antineoplastic Agents pharmacology
CCAAT-Enhancer-Binding Proteins physiology
Cadherins genetics
Cadherins metabolism
Cell Line, Transformed
Cell Line, Tumor
Coloring Agents metabolism
Culture Media, Serum-Free
Cyclin D1 genetics
Cyclin D1 metabolism
Fluorescent Antibody Technique, Direct
Fluorouracil pharmacology
Heat-Shock Proteins physiology
Humans
RNA, Messenger metabolism
RNA, Small Interfering metabolism
Tetrazolium Salts metabolism
Thiazoles metabolism
Transfection
Up-Regulation drug effects
beta Catenin genetics
beta Catenin metabolism
CCAAT-Enhancer-Binding Proteins genetics
CCAAT-Enhancer-Binding Proteins metabolism
Heat-Shock Proteins genetics
Heat-Shock Proteins metabolism
RNA, Small Interfering genetics
Stomach Neoplasms genetics
Stomach Neoplasms pathology
Subjects
Details
- Language :
- English
- ISSN :
- 1745-7254
- Volume :
- 30
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Acta pharmacologica Sinica
- Publication Type :
- Academic Journal
- Accession number :
- 19749785
- Full Text :
- https://doi.org/10.1038/aps.2009.137