Promoting effect of all-trans retinoic acid on the chemosensitivity of esophageal cancer EC9706 cells / 中华肿瘤杂志
Chinese Journal of Oncology
; (12): 663-666, 2010.
Article
in Zh
| WPRIM
| ID: wpr-293531
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the impact of all-trans retinoic acid (ATRA) on chemosensitivity to esophageal squamous cell carcinoma EC9706 cells in vitro and its mechanism.</p><p><b>METHODS</b>EC9706 cells were routinely cultured as the control group. The experimental group was divided into three groups. The ATRA group with ATRA in final concentration of 1 µmol/L; the 5-Fu group with 5-Fu in final concentration of 50 mg/L; the combined treatment group with ATRA in final concentration of 1 µmol/L and 5-Fu 50 mg/L. The cell apoptosis was detected by terminal deoxynucleotidy transferase mediated dUTP nick end labelling (TUNEL). The cell cycle and apoptosis were detected by flow cytometry.</p><p><b>RESULTS</b>The results of TUNEL showed that in the combined treatment group appeared a large number of apoptotic cells, and their nuclei were stained brown, with a positive rate of 89.7%. There was a significant difference in the comparison with the ATRA group (38.3%) and 5-Fu group (40.3%) (P < 0.05). The flow cytometry showed that the ATRA + 5-Fu group had a significantly higher apoptosis rate (76.9% ± 2.7%) than that in the ATRA group (38.2% ± 2.6%) and 5-Fu group (45.2% ± 2.3%) (P < 0.05). The ratio of cells in G(1) phase increased in the ATRA + 5-Fu group (83.4% ± 3.0%), significantly higher than (48.2% ± 2.5%) in the ATRA group and (53.2% ± 2.6%) in the 5-Fu group (P < 0.05). The ratio of cells in S + G(2)/M phase was decreased in the ATRA + 5-Fu group, with a significant difference (P < 0.05) when compared with other groups. There was no significant difference between the ATRA group and 5-Fu group (P > 0.05) in the apoptosis rate and the proportion of cells at different phases.</p><p><b>CONCLUSION</b>ATRA can induce apoptosis of esophageal carcinoma EC9706 cells in vitro. The combination of ATRA and 5-Fu may enhance the chemotherapeutic efficacy.</p>
Full text:
1
Database:
WPRIM
Main subject:
Pathology
/
Pharmacology
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Tretinoin
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Esophageal Neoplasms
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Carcinoma, Squamous Cell
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Cell Cycle
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Apoptosis
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Cell Line, Tumor
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Drug Synergism
/
Fluorouracil
Limits:
Humans
Language:
Zh
Journal:
Chinese Journal of Oncology
Year:
2010
Document type:
Article