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  • Title: Liuwei Dihuang Decoction Drug-containing Serum Attenuates Transforming Growth Factor-β1-induced Epithelial-mesenchymal Transition in HK-2 Cells by Inhibiting NF-κB/Snail Signaling Pathway.
    Author: Pan J, Jiang Y, Huang Y, Zhang H, Wang X, Luo C, Wang H, Tang M, Pei G, Tang Q.
    Journal: Curr Pharm Biotechnol; 2023; 24(12):1589-1602. PubMed ID: 36852808.
    Abstract:
    OBJECTIVES: The nuclear factor-κB (NF-κB) signaling pathway plays an important role in regulating tubular epithelial-mesenchymal transition (EMT), an indispensable cellular programme for driving organ fibrosis and tumor progression. Liuwei Dihuang Decoction (LWD) is an effective Chinese formula for treating chronic renal failure. METHODS: First, by using morphological examination, immunofluorescence staining assay, RTqPCR, and Western blot analysis, in vitro experiments were designed to analyze NF-κB and EMT markers (including Snail, α-SMA, and E-cadherin) in transforming growth factor-β1 (TGF-β1) induced renal tubular epithelial cells (HK-2) and to detect the expression levels of LWD-CS cotreatment. Then, the recombinant lentiviral vector was overexpressed and knocked down by NF- κB and transfected into HK-2 cells. Cells were treated with TGF-β1 (10 ng/ml) with blank serum or LWD-containing serum, respectively, and the expression of these molecules in the NF-κB/Snail signaling pathway was further evaluated. RESULTS: Our results confirmed that TGF-β1 could induce EMT, nuclear translocation of NF-κB p65, and activate the NF-κB/Snail signaling pathway in HK-2 cells. Furthermore, NF-κB knocked-down dramatically increases the TGF-β1-induced mRNA and protein expression level of E-cadherin and reduces the level of Snail and α-SMA; this is reversed by NF-κB overexpression. LWD can decrease the EMT levels through the NF-κB/Snail signaling activation in TGF-β1-induced EMT of HK-2 cells. CONCLUSION: The present study provides evidence suggesting a novel mechanism that LWD exerts anti-fibrosis effects through inhibiting activation of the NF-κB/Snail signaling pathway and consequently downregulating the TGF-β1-induced EMT in renal tubular epithelial cells.
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