The effect of retinoic acid on radiosensitivity analyzed by linear-quadratic model and apoptosis in head and neck squamous carcinoma cell lines / 대한구강악안면방사선학회지
Korean Journal of Oral and Maxillofacial Radiology
;
: 135-143, 2001.
Article
in Korean
| WPRIM
| ID: wpr-177847
ABSTRACT
PURPOSE:
To evaluate the effect of all-trans-retinoic acid on radiosensitivity and radiation-induced apoptosis in NHOK, HEp-2 and FaDu cell lines. Material andMethods:
We measured the changes in survival fraction at 2 Gy (SF2), alpha and beta after treatment of retinoic acid (1 microM) prior to irradiation with doses of 2, 4, 6 and 10 Gy and correlated the radiosensitizing effect of retinoic acid with them. Also, apoptosis induction was assayed with the flow cytometry on days 1, 2, 3, 4 and 5 after irradiation (2, 10 and 20 Gy) combined with retinoic acid. Results andCONCLUSION:
SF2 values for NHOK, HEp-2 and FaDu cell lines were 0.54, 0.64 and 0.41, respectively and the cell line of FaDu was the most radiosensitive. For cell lines of NHOK and HEp-2, pretreatment of cells with retinoic acid resulted in a significant decrease of the SF2 values. The alpha/betaratios of x-ray survival curve were 8.714 (NHOK), 4.098 (HEp-2) and 11.79 (FaDu). The alpha/beta ratio for NHOK decreased on pretreatment with retinoic acid, whereas those for HEp-2 and FaDu increased. Radiation induced apoptosis in all cell lines but, retinoic acid did not affect the apoptosis.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Radiation-Sensitizing Agents
/
Radiation Tolerance
/
Tretinoin
/
Carcinoma, Squamous Cell
/
Cell Line
/
Apoptosis
/
Flow Cytometry
/
Head
/
Neck
Language:
Korean
Journal:
Korean Journal of Oral and Maxillofacial Radiology
Year:
2001
Type:
Article
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