Study of the Effects of 50Hz Homogeneous Magnetic Field on Expression of Bax, Bcl-2 and Caspase-3 of SNU Cells In Vitro

We investigate the effects of magnetic field on expression of Bax, Bcl-2 and Caspase-3 of SNU (human low differentiated gastric adenocarcinoma cell line) in this article. SNU cells were randomly divided into control groups and four treatment groups, the treatment groups were respectively irradiated by 50 Hz homogeneous ferromagnetic field (0.097 T) 5 min, 30 min, 60 min and 120 min. SNU cells were harvested for detection of Bax, Bcl-2 and Caspase-3 antigen with flow cytometric analysis (FCM), immunocytochemical staining and Western blot. The expression of Bax and Caspase-3 in all magnetic field exposure groups were higher than that in control by FCM, immunocytochemical stain and Western blot, but the expression of Bcl-2 in all magnetic field exposure groups were lower than that in control by FCM, immunocytochemical stain and Western blot. We concluded that possible mechanisms of apoptosis of SNU cells after 50 Hz homogeneous ferromagnetic field (0.097 T) treatment may be up-regulating the expression of Bax and Caspase-3, down-regulating the expression of Bcl-2