5-Aza-CdR regulates the expression of RASSF1A gene in human gastric cancer cell line and inhibits the growth of cells / 中华胃肠外科杂志
Chinese Journal of Gastrointestinal Surgery
;
(12): 57-60, 2009.
Article
in Chinese
| WPRIM
| ID: wpr-326557
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of demethylating agent 5-Aza-CdR (5-aza-2'- deoxycytidine) on demethylation and transcription-regulating of RASSF1A gene in gastric cancer cell SGC7901 in vitro, as well as on the growth inhibition of cells.</p><p><b>METHODS</b>After SGC7901 cells were treated with 5-Aza-CdR, MTT assay, flow cytometry, and Annexin V-FITC staining were performed to analyze the cell proliferation, cell cycle and apoptotic rate respectively. Methylation- specific PCP (MSP), RT-PCR and Western blotting were used to detect methylation state, expression of mRNA and protein of RASSF1A gene.</p><p><b>RESULTS</b>After SGC7901 cells were treated with different concentrations of 5-Aza-CdR, the cell growth was inhibited(P<0.05), the cell cycle was blocked at G(1) phase, and the apoptotic rate increased significantly(P<0.05). Hypermethylation was detected in the promoter region of RASSF1A gene in SGC7901 cells, and no expression of RASSF1A mRNA and protein was found. After treated with 5-Aza-CdR, demethylation occurred in RASSF1A gene,which subsequently induced re-expression of this gene at both mRNA and protein level.</p><p><b>CONCLUSION</b>Demethylating agent 5-Aza-CdR can regulate demethylation and re-expression of RASSF1A gene in gastric cancer cell SGC7901,and inhibit its growth.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Stomach Neoplasms
/
Azacitidine
/
Gene Expression Regulation, Neoplastic
/
DNA Methylation
/
Tumor Suppressor Proteins
/
Cell Line, Tumor
/
Genetics
/
Metabolism
Limits:
Humans
Language:
Chinese
Journal:
Chinese Journal of Gastrointestinal Surgery
Year:
2009
Type:
Article
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