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• W2103231366 startingPage "785" @default.
• W2103231366 abstract "Roscovitine has been shown to induce the accumulation of the tumor suppressor p53, to arrest cells in the G(1) and G(2)/M phases of the cell cycle, and to induce apoptosis in human cells. Although these cellular effects of roscovitine are thought to be caused directly by its specific inhibition of cyclin-dependent kinases, other mechanisms may contribute as well. In this study, we investigated whether roscovitine interferes with transcription in human cells. We have previously shown that blockage of transcription is a trigger for the induction of p53 and apoptosis in human fibroblasts. Here we show that mRNA synthesis is suppressed significantly by roscovitine in human cells. Furthermore, our results suggest that the mechanism by which roscovitine inhibits RNA synthesis involves the inhibition of the phosphorylation of the carboxyl-terminal domain of RNA polymerase II. Cells treated with roscovitine at doses that affected transcription were found to accumulate p53 in the nucleus; curiously, however, the nuclear accumulation of p53 was not accompanied by modifications at either the Ser15 or Lys382 sites of p53. We conclude that roscovitine is a potent inhibitor of RNA synthesis and that this inhibition may be responsible for the accumulation of nuclear p53." @default.
• W2103231366 created "2016-06-24" @default.
• W2103231366 creator A5037194300 @default.
• W2103231366 creator A5052545112 @default.
• W2103231366 date "2001-10-01" @default.
• W2103231366 modified "2023-09-23" @default.
• W2103231366 title "The cyclin-dependent kinase inhibitor roscovitine inhibits RNA synthesis and triggers nuclear accumulation of p53 that is unmodified at Ser15 and Lys382." @default.
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• W2103231366 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/11562441" @default.
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