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- W1969027021 abstract "We investigated the efficacy and mechanism of dimethylaminoparthenolide (DMAPT), an NF-κB inhibitor, to sensitize human lung cancer cells to X-ray killing in vitro and in vivo. We tested whether DMAPT increased the effectiveness of single and fractionated X-ray treatment through inhibition of NF-κB and/or DNA double-strand break (DSB) repair. Treatment with DMAPT decreased plating efficiency, inhibited constitutive and radiation-induced NF-κB binding activity, and enhanced radiation-induced cell killing by dose modification factors of 1.8 and 1.4 in vitro. X-ray fractionation demonstrated that DMAPT inhibited split-dose recovery/repair, and neutral DNA comet assays confirmed that DMAPT altered the fast and slow components of X-ray-induced DNA DSB repair. Knockdown of the NF-κB family member p65 by siRNA increased radiation sensitivity and completely inhibited split-dose recovery in a manner very similar to DMAPT treatment. The data suggest a link between inhibition of NF-κB and inhibition of DSB repair by DMAPT that leads to enhancement of X-ray-induced cell killing in vitro in non-small-cell lung cancer cells. Studies of A549 tumor xenografts in nude mice demonstrated that DMAPT enhanced X-ray-induced tumor growth delay in vivo." @default.
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- W1969027021 date "2011-12-01" @default.
- W1969027021 modified "2023-09-30" @default.
- W1969027021 title "Inhibition of NF-κB and DNA double-strand break repair by DMAPT sensitizes non-small-cell lung cancers to X-rays" @default.
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- W1969027021 doi "https://doi.org/10.1016/j.freeradbiomed.2011.09.029" @default.
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