@article{APS3631,
author = {Li-cheng Dai and Xiang Wang and Xing Yao and Li-shan Min and Fu-chu Qian and Jian-fang He},
title = {Antisense oligonucleotide targeting p53 increased apoptosis of MCF-7 cells induced by ionizing radiation},
journal = {Acta Pharmacologica Sinica},
volume = {27},
number = {11},
year = {2016},
keywords = {},
abstract = {Aim: To investigate the effect of antisense compounds (AS) targeting human p53 mRNA on radiosensitivity of MCF-7 cells.
Methods: Western blotting and RT-PCR were used to analyze the protein content and mRNA level. Additionally, cell proliferation, cell cycle and cell apoptosis were all analyzed in irradiated or sham-irradiated cells.
Results: Among the five antisense compounds (AS), AS3 was identified to efficiently inhibit p53 mRNA level and protein content. Interestingly, AS3 transfer has little effect on cell proliferation in DU-145 cells (mutant p53) after ionizing radiation (IR). In contrast, a marked increase of cell apoptosis and growth inhibition were observed in MCF-7 cells (wild-type p53), suggesting that AS3 can increase radiosensitivity of MCF-7 cells. Additionally, it was also observed that the transfection of AS3 decreased the fraction of G1 phase cells, and increased the proportion of S phase cells compared to untreated cells 24 h after IR in MCF-7 cell lines.
Conclusion: AS3 transfection increases MCF-7 cell apoptosis induced by 5 Gy-radiation, and this mechanism maybe closely associated with abrogation of G1 phase arrest.},
issn = {1745-7254}, url = {http://www.chinaphar.com/article/view/3631}
}