YANG Yepeng, CHEN Guanying, GUAN Zengwei, et al. EFFECTS OF 60Co γ RAYS ON THE CELL CYCLE PROGRESS OF MCF-7 CELLS[J]. Journal of Radiation Research and Radiation Processing, 2002,20(4):281-283.
YANG Yepeng, CHEN Guanying, GUAN Zengwei, et al. EFFECTS OF 60Co γ RAYS ON THE CELL CYCLE PROGRESS OF MCF-7 CELLS[J]. Journal of Radiation Research and Radiation Processing, 2002,20(4):281-283.DOI:
To investigate the effects of ionizing radiation on cell cycle progress of tumor cell lines, the human breast cancer MCF-7 cell line cultured in vitro was exposed to ,60,Co γ rays and the alterations in cell cycle progress after irradiation were measured by flow cytometry.The results indicated that the MCF-7 cells showed a transient ,S, arrest continuing for about 6h and an obvious ,G,2, arrest continuing for about 63h after irradiation with 5.0Gy γ rays. ,S, and ,G,2, arrest culminated at 9h and 18h respectively after irradiation and the peak values of ,S, and ,G,2, arrest reached respectively 1.6 times and 6.2 times as many as normal value. The dose-effect curve examined 9h after irradiation was quite different from that examined 18h after irradiation. Both of the ,S, arrest at 9h after irradiation and the ,G,2, arrest at 18h after irradiation presented significant relationship with irradiation dose.