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- W2043485491 abstract "Epithelial to mesenchymal transition (EMT) is a process by which an epithelial cell alters its phenotype to that of a mesenchymal cell and plays a critical role in embryonic development, tumour invasion and metastasis and tissue fibrosis. Transforming growth factor-β1 (TGF-β1) continues to be regarded as the key growth factor involved in driving EMT however recently tumour necrosis factor α (TNFα) has been demonstrated to accentuate TGF-β1 driven EMT. In this study we investigate how various signalling pathways contribute to this accentuated effect. A549 cells were treated with TGF-β1 (10 ng/ml), TNFα (20 ng/ml) or a combination of both for 72 h and EMT assessed. The effect of selective inhibition of the SMAD, MAPK and NF-κB pathways on EMT was assessed. A549 cells treated with TGF-β1 downregulate the expression of epithelial markers, increase the expression of mesenchymal markers, secrete matrix-metalloproteinases and become invasive. Significantly, TGF-β1 driven EMT is accentuated by co-treatment with TNFα. SMAD 3 inhibition attenuated TGF-β1 driven EMT but has no effect on the accentuation effect of TNFα. However, inhibiting IKKβ blocked both TGF-β1 driven EMT and the accentuating action of TNFα. Inhibiting p38 and ERK signalling had no effect on EMT. TNFα accentuates TGF-β1 driven EMT in A549 cells via a SMAD 2/3 independent mechanism involving the NF-κB pathway independent of p38 and ERK 1/2 activation." @default.
- W2043485491 created "2016-06-24" @default.
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- W2043485491 date "2011-07-27" @default.
- W2043485491 modified "2023-09-25" @default.
- W2043485491 title "Transforming Growth Factor-β1 (TGF-β1) Driven Epithelial to Mesenchymal Transition (EMT) is Accentuated by Tumour Necrosis Factor α (TNFα) via Crosstalk Between the SMAD and NF-κB Pathways" @default.
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- W2043485491 doi "https://doi.org/10.1007/s12307-011-0080-9" @default.
- W2043485491 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3343199" @default.
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- W2043485491 hasPublicationYear "2011" @default.
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