Antisense ERCC1 RNA decreases the repair capability of damaged DNA in lung cancer cells induced by benzoapyrene / 中华预防医学杂志
Chinese Journal of Preventive Medicine
;
(12): 167-170, 2003.
Article
in Chinese
| WPRIM
| ID: wpr-257211
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of ERCC1 gene on the repair capability of damaged DNA in lung cancer A549 cells induced by benzo[a]pyrene.</p><p><b>METHODS</b>Recombinant plasmid expressing ERCC1 antisense RNA was constructed and transfected into A549 cells by Lipofectin reagent. The stable-transfected cell colonies were selected by hygromycin. Cell viability was determined by the MTT assay. The level of ERCC1 mRNA was measured by Northern Blot analysis. Single cell gel electrophoresis assay was applied to determine the cellular DNA damage and fifty cells for each group were counted.</p><p><b>RESULTS</b>Seven positive colonies expressing ERCC1 antisense RNA were screened. There was no growth rate difference between the antisense-transfected cells and the parental cells. The endogenous mRNA level in transfected colonies decreased in varied degrees, i.e. 12% approximately 86% of that of the parental cells in Northern Blot assay. After 24 h treatment of 10 micro mol/l benzo[a]pyrene, the repair capability for DNA damage in transfected colonies was reduced to 29% approximately 71% of that of the parental cells. Also, a statistically significant correlation was observed between expression of ERCC1 mRNA and repair capability (r = 0.84).</p><p><b>CONCLUSION</b>Antisense ERCC1 RNA decreased the repair capability for damaged DNA in lung cancer cells induced by benzo[a]pyrene.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Pharmacology
/
Plasmids
/
Repressor Proteins
/
Benzo(a)pyrene
/
DNA Damage
/
RNA, Messenger
/
Transfection
/
RNA, Antisense
/
Cell Line, Tumor
Limits:
Humans
Language:
Chinese
Journal:
Chinese Journal of Preventive Medicine
Year:
2003
Type:
Article
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