Abstract
Objective:To study the changes of PTEN gene expression in radiation-induced bystander cells.Methods:The irradiated cells and non-irradiated cells were co-cultured in a ratio of 11.The culture medium of irradiated cells was used to culture non-irradiated cells to create two bystander cell models. The expression of PTEN mRNA and protein in the bystander cells,irradiated cells,non-irradiated cells was compared.Results:The protein expression of PTEN in the irradiated cells was negatively associated with the irradiation dose.The down-regulation degree of PTEN protein was related to the different treatments of cells.The most prominent down-regulation was found in the bystander cells cultured with medium of irradiated cells.The down-regulation of PTEN protein in the two kinds of bystander cells was more severe than that in the irradiated cells(P0.01).Conclusion:PTEN protein expression can be influenced by low dose radiation and the bystander effect of radiation.
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