Inhibition of NF-kappaB by the proteasome inhibitor Velcade enhances radiosensitivity of certain human cervical carcinoma cancer cells in vitro. These results raise the possibility that inhibition of NF-kappaB will result in radiosensitization only in those tumor cells which are more dependent on NF-kappaB for their metabolism and survival, however, the radiosensitivity of "NF-kappaB independent" cells are not likely influenced by it.
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