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- W2126057792 abstract "Abstract Human tumor cell death during radiotherapy is caused mainly by ionizing radiation (IR)–induced DNA double-strand breaks (DSB), which are repaired by either homologous recombination repair (HRR) or nonhomologous end-joining (NHEJ). Although siRNA-mediated knockdown of DNA DSB repair genes can sensitize tumor cells to IR, this approach is limited by inefficiencies of gene silencing. In this study, we show that combining an artificial miRNA (amiR) engineered to target 3′-untranslated regions of XRCC2 (an HRR factor) or XRCC4 (an NHEJ factor) along with an siRNA to target the gene coding region can improve silencing efficiencies to achieve more robust radiosensitization than a single approach alone. Mechanistically, the combinatorial knockdown decreased targeted gene expression through both a reduction in mRNA stability and a blockade to mRNA translation. Together, our findings establish a general method of gene silencing that is more efficient and particularly suited for suppressing genes that are difficult to downregulate by amiR- or siRNA-based methods alone. Cancer Res; 72(5); 1221–8. ©2012 AACR." @default.
- W2126057792 created "2016-06-24" @default.
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- W2126057792 date "2012-03-01" @default.
- W2126057792 modified "2023-10-14" @default.
- W2126057792 title "RNAi-Mediated Targeting of Noncoding and Coding Sequences in DNA Repair Gene Messages Efficiently Radiosensitizes Human Tumor Cells" @default.
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- W2126057792 doi "https://doi.org/10.1158/0008-5472.can-11-2785" @default.
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