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- W2049434157 abstract "The ubiquitin-proteasome system (UPS) is one of the most promising anticancer drug targets of the century. However, the involved molecular mechanisms are still unclear. The nonsense-mediated mRNA decay (NMD) pathway is a highly conserved pathway which degrades nonsense mutation‑containing mRNA selectively and efficiently. In this pathway, the SMG1-Upf1-eRF (SURF) complex binds to Upf2 on the exon junction complex and finally causes degradation of nonsense-containing mRNA. To reveal the relationship between the UPS and NMD pathways, we analyzed the effects of proteasome inhibitors on Upf1 and Upf2. The data showed that treatment with proteasome inhibitors caused the accumulation of the Upf1 and Upf2 proteins in A549 cells. In addition, we found that knockdown of SMG1 also caused the upregulation of Upf1 and Upf2 proteins, which was confirmed by different target sequences of siRNA. SMG1 and UPS appear to participate in different pathways of the degradation of Upf1 and Upf2, since simultaneous treatment with both of them caused additive effects. This study demonstrated the quantitative regulation of Upf1 and Upf2 proteins by UPS and SMG1." @default.
- W2049434157 created "2016-06-24" @default.
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- W2049434157 date "2013-10-25" @default.
- W2049434157 modified "2023-09-30" @default.
- W2049434157 title "Proteasome inhibitors and knockdown of SMG1 cause accumulation of Upf1 and Upf2 in human cells" @default.
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- W2049434157 doi "https://doi.org/10.3892/ijo.2013.2149" @default.
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