FU Haiqing, LUO Can, FU Shibo, et al. EFFECT OF IONIZING RADIATION ON p53 AND MDM2 GENE EXPRESSIONS OF EL-4 CELLS[J]. Journal of Radiation Research and Radiation Processing, 2000,18(3):208-211.
FU Haiqing, LUO Can, FU Shibo, et al. EFFECT OF IONIZING RADIATION ON p53 AND MDM2 GENE EXPRESSIONS OF EL-4 CELLS[J]. Journal of Radiation Research and Radiation Processing, 2000,18(3):208-211.DOI:
To explore the molecular mechanism of G,1, arrest of EL-4 cells induced by whole body irradiation (WBI), Flow cytometry (FCM) and Northern blot were used to analyze p53, MDM2 gene expressions of EL-4 cells after irradiation with X-rays. Results showed that the p53 protein level of El-4 cells increased from 2 to 24h, and the MDM2 protein level of El-4 increased from 4 to 24h after 4Gy irradiation with X-rays. Meanwhile, the MDM2 mRNA level was significantly increased at 4h after irradiation. Conclusion: these results suggested that there was a feedback loop between p53 and MDM2 protein in EL-4 cells after irradiation with X-rays, which made G,1, arrest cells reenter cell cycle.