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- W2120981600 abstract "Endothelin-1 is a powerful mitogen for various tumor and non-tumor cells. Its signaling cascade induces the inflammatory NF-κB complex, leading to expression of a number of target genes. In this context, MAPK p38 has been regarded as a potential phosphate donor for the p65 subunit of NF-κB. In the present study in HeLa cells, we have found that ET-1 induced signalling activates the NF-κB transcription complex (TC) in the nucleus at 6 h specifically via ET-A — but not ET-B receptor. The TC contains p65, p38 (α and β) – binding to the NLS of p65 in the cytoplasm – as well as p50, but no IκBα. Specific p38 inhibition by SB203580 or by siRNA interferes markedly with gene expression of several target genes. Complex formation occurs in the cytoplasm, and both transcription factors transmigrate as a complex in the nucleus. Overexpression of p38, treatment with Chrysin, MG132, or dimethylformamide shows dependence of TC on p38 as partner. In other tumor cells lines studied, ET-1 activates TC, with p38 as an important complex partner of p65. TC-induction by ET-1 contains about twice the amount of p38 than by TNFα. Thus, p38 may be an additional therapeutic target to control inflammatory gene expression in tumor cells." @default.
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- W2120981600 date "2008-09-01" @default.
- W2120981600 modified "2023-10-16" @default.
- W2120981600 title "A p38–p65 transcription complex induced by endothelin-1 mediates signal transduction in cancer cells" @default.
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- W2120981600 doi "https://doi.org/10.1016/j.bbamcr.2008.04.003" @default.
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