[Detection of DNA injury and repair with single cell gel electrophoresis radiation in biodosimetry].
OBJECTIVE
To explore the relationship between DNA repair in vitro and in vivo after irradiation, and to describe the curves of DNA repair which can improve the accuracy of radiation dose estimation.


METHODS
The DNA double-strand break in lymphocytes of human and mouse was detected using neutral single cell gel electrophoresis (SCGE) after radiation and the curves of DNA repair individually were estimated, which were compared later.


RESULTS
Along with the time lapsing, the DNA repair of human peripheral blood and mice increased significantly and the residual damage decreased gradually, which showed significant time-effect relationship. The curve of DNA repair in vitro of human lymphocytes presented the same log model as that of mouse DNA repair in vivo. The curve showed as followed respectively: Mice: Y(TM) = 55.8256 - 10.792 lnX (R(2) = 0.629, P < 0.01) and Y(OTM) = 25.4173 - 4.5273 lnX (R(2) = 0.661, P < 0.01); Human: Y(TM) = 30.242 7 - 7.383 6 lnX (R(2) = 0.686, P < 0.01) and Y(OTM) = 17.9772 - 3.9125 lnX (R(2) = 0.752, P < 0.01).


CONCLUSIONS
The curve of DNA repair in vitro of human lymphocytes could be considered in biodosimetry estimation because the process of DNA repair in vitro could display the repair level and speed of DNA double-strand break in vivo.
Liu
Qiang
Q
Tianjin Key Laboratory of Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China.
Jiang
En-Hai
EH
Li
Jin
J
Tang
Wei-Sheng
WS
Wang
Zhi-Quan
ZQ
Zhao
Yong-Cheng
YC
Fan
Fei-Yue
FY
D000818:Animals; D002470:Cell Survival; D020552:Comet Assay; D004249:DNA Damage / Q000528:radiation effects*; D004260:DNA Repair / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D005260:Female; D006801:Humans; D008214:Lymphocytes / Q000528:radiation effects*; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D011829:Radiation Dosage; D059010:Single-Cell Analysis