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Journal Article
Research Support, Non-U.S. Gov't
Blocking of PI3K/AKT induces apoptosis by its effect on NF-κB activity in gastric carcinoma cell line SGC7901.
Biomedicine & Pharmacotherapy 2010 November
NF-κB plays an important role in many aspects of tumorigenesis and tumor progression by its antiapoptosis effect. Hence, NF-κB has been regarded as a therapeutic target in cancer, because inhibition of NF-κB not only induces enhancing apoptosis but also causes increasing sensitivity to radiation or chemotherapy in several tumor cells. The activation of NF-κB is presumed to be associated with PI3K/Akt signal pathway in gastric carcinoma, but the underlying molecular mechanism remains unclear. Our work demonstrates that blocking PI3K/Akt by LY294002 inhibits the NF-κB activity with significantly increased apoptosis in gastric cancer cell. Furthermore, when the cells were pretreated with IKK siRNA and/or IκB siRNA then exposed to LY294002, the results suggest that the regulatory significantly increased apoptosis in gastric cancer cell. Furthermore, when the cells were pretreated, effect of PI3K/AKT on NF-κB activity is associated with the influence of PI3K/AKT on IKK/IκB. The apoptosis induced by blocking PI3K/AKT might be ascribed to inhibition of NF-κB activity through IKK/IκB at least in part.
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