ABSTRACT
Objective To analyze the effect of X-irradiation on the proteins expression of p57kip2 and TGF-β1 in lung cancer cell stain A549 and its clinical significance.Methods Lung cancer cell stain A549 was cultivated and cell,protein was extracted at 6,12,24,36 and 48 hours after X-irradiation by differenl doses(2,4, 8 and 12 Gy).The expression of p57kip2 and TGF-β1 proteins were examined by Western blot.Results The expression of p57kip2 in lung cancer cell stain A549 was very low before X-irradiation.and increased significantly after irradiation with difierent doses and reached the peak level at 12 hours after irradiation(P<0.05).TGF-β1 reached its peak 1evel at 6 hours after irradiation(P<0.05).Conclusions X-irradiation can up-regulate the expression of p57kip2 and TGF-β1 proteins which increased with certain doses.p57kip2 and TGF-β1 could be usedto predict the damage degree of cancer cells by X-ray.