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Radiosensitization and Anti-tumour Effects of Cytosine Deaminase and Thymidine Kinase Fusion Suicide Gene in Human Adenoid Cystic Carcinoma Cells
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| Zeitschriftentitel: | Journal of International Medical Research |
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| Personen und Körperschaften: | , , , , , , |
| In: | Journal of International Medical Research, 37, 2009, 2, S. 479-490 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
SAGE Publications
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| Schlagwörter: |
| Zusammenfassung: | <jats:p> Herpes simplex virus thymidine kinase (HSV-TK) and Escherichia coli cytosine deaminase (CD) can convert innocuous prodrugs into cytotoxic metabolites and are being investigated for use in gene therapy for cancer. Human adenoid cystic carcinoma (ACC-2) cells transduced with a CD/HSV-TK fusion gene (ACC-2/CD-TK cells) were found to be more sensitive to radiation than ACC-2 cells when exposed to 5-fluorocytosine (5-FC; 40 μg/ml) plus ganciclovir (0.1 μg/ml) for 48 h before irradiation. Analysis of radiation survival curves for cells exposed to 5-FC plus ganciclovir before irradiation showed that ACC-2 cells had a higher capacity for sublethal damage repair (D<jats:sub>q</jats:sub> value) and greater cellular radiosensitivity (D<jats:sub>0</jats:sub> value) than ACC-2/CD-TK cells. Colony formation rate after 2 Gy of irradiation was significantly greater for ACC-2 than for ACC-2/CD-TK cells when cells were treated with 5-FC plus ganciclovir before irradiation. This study, therefore, indicates that addition of radiation might substantially improve the therapeutic potential of CD-TK fusion gene therapy of human adenoid cystic carcinomas. </jats:p> |
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| Umfang: | 479-490 |
| ISSN: |
0300-0605
1473-2300 |
| DOI: | 10.1177/147323000903700224 |