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| Content Provider | MDPI |
|---|---|
| Author | Jung, Hun Rajasekaran, Nirmal Song, Sang Kim, Young Hong, Sungyoul Choi, Hyuck Choi, Jong-Sun Choi, Yoon-La Shin, Young |
| Abstract | The functional inactivation of TP53 and Rb tumor suppressor proteins by the HPV-derived E6 and E7 oncoproteins is likely an important step in cervical carcinogenesis. We have previously shown siRNA technology to selectively silence both E6/E7 oncogenes and demonstrated that the synthetic siRNAs could specifically block its expression in HPV-positive cervical cancer cells. Herein, we investigated the potentiality of E6/E7 siRNA candidates as radiosensitizers of radiotherapy for the human cervical carcinomas. HeLa and SiHa cells were transfected with HPV E6/E7 siRNA; the combined cytotoxic effect of E6/E7 siRNA and radiation was assessed by using the cell viability assay, flow cytometric analysis and the senescence-associated β-galactosidase (SA-β-Gal) assay. In addition, we also investigated the effect of combined therapy with irradiation and E6/E7 siRNA intravenous injection in an in vivo xenograft model. Combination therapy with siRNA and irradiation efficiently retarded tumor growth in established tumors of human cervical cancer cell xenografted mice. In addition, the chemically-modified HPV16 and 18 E6/E7 pooled siRNA in combination with irradiation strongly inhibited the growth of cervical cancer cells. Our results indicated that simultaneous inhibition of HPV E6/E7 oncogene expression with radiotherapy can promote potent antitumor activity and radiosensitizing activity in human cervical carcinomas. |
| File Size | 2795520 |
| Ending Page | 12260 |
| Page Count | 18 |
| Starting Page | 12243 |
| File Format | |
| e-ISSN | 14220067 |
| DOI | 10.3390/ijms160612243 |
| Journal | International Journal of Molecular Sciences |
| Issue Number | 6 |
| Volume Number | 16 |
| Language | English |
| Publisher Date | 2015-05-29 |
| Access Restriction | Open |
| Subject Keyword | E6 E7 siRNA Concurrent Chemoradiation therapy (CCRT) radiotherapy radiosensitizer cervical cancer |
| Content Type | Text |
| Resource Type | Article |
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