| TAO Hua,GUO Ye-song,JIANG Ming,et al.Radiosensitization of lobaplatin on human nasopharyngeal cancer cell line CNE2 in vitro[J].Chinese Journal of Radiological Medicine and Protection,2013,33(6):602-606 |
| Radiosensitization of lobaplatin on human nasopharyngeal cancer cell line CNE2 in vitro |
| Received:January 17, 2013 |
| DOI：10.3760/cma.j.issn.0254-5098.2013.06.009 |
| KeyWords:Lobaplatin Nasopharyngeal carcinoma CNE2 cell line Radiosensitivity |
| FundProject: |
| Author Name | Affiliation | E-mail | | TAO Hua | Department of Radiation Oncology, Jiangsu Cancer Hospital, Nanjing 210009, China | th1977kissme@126.com | | GUO Ye-song | Department of Radiation Oncology, Jiangsu Cancer Hospital, Nanjing 210009, China | | | JIANG Ming | Department of Radiation Oncology, Jiangsu Cancer Hospital, Nanjing 210009, China | | | WANG Fei-jiang | Department of Radiation Oncology, Jiangsu Cancer Hospital, Nanjing 210009, China | |
|
| Hits: 3710 |
| Download times: 2500 |
| Abstract:: |
| Objective To investigate the effect of lobaplatin combined with irradiation on human nasopharyngeal cancer cell line CNE2, and to illuminate its mechanism of radiosensitization. Methods MTT assay was used to detect the outcome of lobaplatin and irradiation on CNE2 cell proliferation. Clonogenic assay was applied to testify the radiosensitization effect of lobaplatin on the cells. Flow cytometry was used to check the cell cycle distribution and cell apoptosis. Western was used to detect the expression of Bcl-2, Bax and cleaved Caspase-3. Results The proliferation of CNE2 cells was reduced by lobaplatin in a dose-dependent manner. IC50 of lobaplatin on CNE2 cells and lobaplatin combined with 4 Gy irradiation was 1.610 μmol/L and 0.077 μmol/L, respectively. The radiosensitization ratio of the combination group was over 3. Within 24 h of drug treatment,the percent of cells in G2/M phase increased with the concentration of lobaplatin. When the concentration of lobaplatin increased to 6 μmol/L, the cells of combination group were arrested at S phase. The apoptosis rate of lobaplatin(5 μmol/L)group,radiotherapy(4 Gy)group and combination group was 15.6%, 11.3% and 61.8%,respectively. Western blot showed that the expressions of Bax and cleaved Caspase-3 increased but Bcl-2 decreased in the combination group. Conclusion Lobaplatin could increase radiosensitization of human nasopharyngeal cancer cell line CNE2, probably by depressing Bcl-2 but enhancing Bax expression and hence activating Bcl-2/Bax-Caspase signaling pathway. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
