progression in mice liver WU Zhenhua1, 3 ZHANG Hong1, 3 ZHAO Weiping1, et al. Effects of low dose 12C6+ ion beam pre-irradiation on DNA damage and cell cycle progression in mice liver[J]. Nuclear techniques, 2009, 32(9): 684-688.
progression in mice liver WU Zhenhua1, 3 ZHANG Hong1, 3 ZHAO Weiping1, et al. Effects of low dose 12C6+ ion beam pre-irradiation on DNA damage and cell cycle progression in mice liver[J]. Nuclear techniques, 2009, 32(9): 684-688.DOI:
To investigate effects of low dose heavy ions pre-irradiation on radiation damage in mice liver
Kun-Ming strain mice were irradiated to 0
0.05
0.1
0.25 or 0.5 Gy of 12C6 + ions
respectively
at a dose rate of 0.2 Gy/min.Four hours later
the mice were irradiated to 4 Gy by 12C6 + ions.At 8h after irradiation
the cell cycles of liver cells were analyzed by FACS
and the degree of DNA damage was measured by single cell gel electrophoresis through the determination of cells frequency with tail moment and tail lengths.The results indicated that compared with irradiation control group of 4 Gy
the percentages of cells after pre-exposure with low-dose 12C6 + ions at G0/G1-phase and G2/M-phase on liver decreased significantly
whereas the percentages of S-phase cells increased.Similarly
the tail length and tail moment induced by 12C6 + ion beams irradiation decreased evidently(P < 0.01 or P < 0.05)
especially the 0.1 Gy pre-exposure group(P < 0.01).The data showed that pre-exposure with low-dose heavy ions could induce the adaptive response in liver cells of mice
alleviate the G0/G1 and G2/M phase arrest and reduce the DNA damages remarkably induced by 12C6 + ion beams.