The lethal effect of combined MDR1 antisense RNA with oxaliplatin and 5-FU on drug-resistant rectal carcinoma cells / 中华外科杂志
Chinese Journal of Surgery
;
(12): 770-773, 2006.
Article
in Chinese
| WPRIM
| ID: wpr-300612
ABSTRACT
<p><b>OBJECTIVE</b>To observe the lethal effect of multidrug resistance gene (MDR1) antisense RNA combined with oxaliplatin and 5-FU on drug-resistant rectal carcinoma cells.</p><p><b>METHODS</b>PC-MDR1 plasmid including MDR1 was constructed with gene cloning techniques. The drug-resistant cancer cells (8348R) were transferred with the plasmids, and the positive neoplasm cells were selected with G418. Green fluorescent protein (GFP) gene was used as a reporting gene to monitor the gene transfer efficiency under the influence of oxaliplatin and 5-FU. The cytotoxicity and therapeutic effects of MDR1 anti-sense RNA combined with oxaliplatin and 5-FU were evaluated by colony-forming rate and MTT assay.</p><p><b>RESULTS</b>A significant decrease of biological activity was observed in 8348R cells transferred with PC-MDR1, cell cycles were blocked in S phase, or in G2/M phase, and apoptosis rate of the cells increased. With treatment of oxaliplatin, the plasmid transfer efficiency in the drug-resistant cancer cells was improved about 18 times. Using an IC(50) dose of oxaliplatin and 5-FU combined with (MDR1) anti-sense RNA, 75 percent of 8348R cells were killed, which was significant higher than that of the control cells.</p><p><b>CONCLUSIONS</b>Combined MDR1 antisense RNA with oxaliplatin and 5-FU has a synergistic effect of killing drug-resistant cancer cells and may be a promising method for treating drug-resistant rectal carcinoma.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Organoplatinum Compounds
/
Pathology
/
Pharmacology
/
Rectal Neoplasms
/
Therapeutics
/
Transfection
/
Genetic Therapy
/
Cell Cycle
/
RNA, Antisense
/
Apoptosis
Limits:
Humans
Language:
Chinese
Journal:
Chinese Journal of Surgery
Year:
2006
Type:
Article
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