Abstract:Objective：To investigate the mechanism and role of γ-ray of 103pd in the treatment of biliary duct cancer.
Methods ：A series of biliary duct cancer cells were treated with different γ-ray dose, and MTT ［3-(4,5-dimethy thiazol-2-yl)-2,5-diphenyl terazolium-bromide］ technique was used to determine the inhibition rate of γ-ray of 103pd on the biliary duct cancer cells; and electron micro-technique, DNA agarose gel electrophoresis and flow cytometry to evaluate the morphological characteristics and apoptosis rate of the biliary duct cancer cells were also used.
Results：The γ-ray radiation of 103pd resulted in significant inhibition of the biliary duct cancer cells. The features of biliary duct cancer cells apoptosis(e,g：apoptic bodies, DNA ladders band hypodiploid DNA peak) could be seen in the group with lower dosage (5.333mci), and cell necrosis was seen in higher dosage (more than 6.645 mci).
Conclusions：The γ-ray radiation could induce apoptosis of the biliary duct cancer cells, but with dose dependence, and apoptosis can be an important mechanism for radiation treatment of biliary duct cancer.