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- W2955398906 endingPage "883" @default.
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- W2955398906 abstract "Inhibitors of DNA topoisomerase I (TOP1), an enzyme relieving torsional stress of DNA by generating transient single-strand breaks, are clinically used to treat ovarian, small cell lung and cervical cancer. As torsional stress is generated during transcription by progression of RNA polymerase II through the transcribed gene, we tested the effects of camptothecin and of the approved TOP1 inhibitors Topotecan and SN-38 on TNFα-induced gene expression. RNA-seq experiments showed that inhibition of TOP1 but not of TOP2 activity suppressed the vast majority of TNFα-triggered genes. The TOP1 effects were fully reversible and preferentially affected long genes. TNFα stimulation led to inducible recruitment of TOP1 to the gene body of IL8, where its inhibition by camptothecin reduced transcription elongation and also led to altered histone H3 acetylation. Together, these data show that TOP1 inhibitors potently suppress expression of proinflammatory cytokines, a feature that may contribute to the increased infection risk occurring in tumor patients treated with these agents. On the other hand, TOP1 inhibitors could also be considered as a therapeutic option in order to interfere with exaggerated cytokine expression seen in several inflammatory diseases." @default.
- W2955398906 created "2019-07-12" @default.
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- W2955398906 date "2019-06-25" @default.
- W2955398906 modified "2023-10-01" @default.
- W2955398906 title "Chemotherapeutic Drugs Inhibiting Topoisomerase 1 Activity Impede Cytokine-Induced and NF-κB p65-Regulated Gene Expression" @default.
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- W2955398906 doi "https://doi.org/10.3390/cancers11060883" @default.
- W2955398906 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6627772" @default.
- W2955398906 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31242600" @default.
- W2955398906 hasPublicationYear "2019" @default.
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