Hayashi M, Kuzumi T, Arai S, Okui T
Department of Veterinary Radiology, Faculty of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan.
J Vet Med Sci. 1999 Aug;61(8):975-8. doi: 10.1292/jvms.61.975.
The effect of X-irradiation on the progression of the cell cycle in cell lines from LEC and WKAH rats was investigated by a flow cytometer. When the cells were exposed to 5 Gy of X-rays at S phase, the proportion of S-phase cells in both cell populations decreased with incubation time and that of G2/M-phase cells was approximately 80% at 6 hr post-irradiation. At 12 hr post-irradiation, approximately 45% of the WKAH rat cells appeared in the G1 phase. However, 80-90% of LEC rat cells remained in the G2/M phase and less than 5% in the G1 phase during 6-12 hr post-irradiation. Thus, the LEC rat cells irradiated at S phase remained in the G2/M phase for at least 6 hr longer than did the WKAH rat cells.
