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[Determination of the repair half-time of human nasopharyngeal carcinoma cell lines CNE1, CNE2, HONE1 and C666-1].
- Source :
-
Nan fang yi ke da xue xue bao = Journal of Southern Medical University [Nan Fang Yi Ke Da Xue Xue Bao] 2010 Apr; Vol. 30 (4), pp. 777-8. - Publication Year :
- 2010
-
Abstract
- Objective: To determine the repair half-time (T1/2), a speed parameter of sub-lethal damage repair (SLDR), of human nasopharyngeal carcinoma (NPC) cell lines CNE1, HONE1, C666-1 and CNE2.<br />Methods: A total radiation dose of 8 Gy divided into 4+4 Gy was delivered to the cell lines at the interval of 0 s, 15 s, 30 s, 1 h, 2 h, 4 h or 6 h. The cell survival fractions were determined using the standard cell clonogenic assay. The curves of the changes in the surviving cell fraction after a total dose of 8 Gy, as a function of the interval between the two doses of 4 Gy, were fitted manually, and the T1/2 of each cell line was calculated according to the curves.<br />Results: The T1/2 of CNE1, HONE1, C666-1 and CNE2 were 18 s, 22 s, 29 s and 27 s, respectively.<br />Conclusion: The speed of SLDR of NPC cells is quite rapid, indicating that the fraction delivery time longer than 20 s might decrease the effect of radiotherapy.
Details
- Language :
- Chinese
- ISSN :
- 1673-4254
- Volume :
- 30
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Nan fang yi ke da xue xue bao = Journal of Southern Medical University
- Publication Type :
- Academic Journal
- Accession number :
- 20423849