Abstract
Epithelial–mesenchymal transition (EMT) is a biological process in which tubular epithelial cells lose their phenotypes, and new mesenchymal feature are obtained. In particular, type II EMT possibly contributes to renal tissue fibrogenesis. Recent studies indicate that Lefty-1, a novel member of the TGF-β superfamily with pleiotropical and biological regulation characteristics on TGF-β and other signaling pathways, is considered to have potential fibrotic effects. However, its role in EMT, which is often a long-term consequence of renal tubulointerstitial fibrosis, remains unknown. In this study, we found that Lefty-1 alleviates EMT induction through antagonizing TGF-β/Smad pathway in vivo and in vitro. In unilateral ureteral obstruction (UUO) model mice, administration of adenovirus-mediated overexpression of Lefty-1 (Ad-Lefty-1) significantly reduced TGF-β1/Smad expression and alleviated the phenotypic transition of epithelial cells to mesenchymal cells and extracellular matrix (ECM) accumulation. In high glucose-induced rat renal tubular duct epithelial cell line (NRK-52E), EMT and ECM synthesis were alleviated with Lefty-1 treatment, which significantly inhibited TGF-β1/Smad pathway activation in UUO mice and high glucose-treated NRK-52E cells. Thus, Lefty-1 can alleviate EMT and renal interstitial fibrosis in vivo and in vitro through antagonizing the TGF-β/Smad pathway, and Lefty-1 might have a potential novel therapeutic effect on fibrotic kidney diseases.
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Abbreviations
- CKD:
-
Chronic kidney disease
- HG:
-
High glucose
- UUO:
-
Unilateral ureteral obstruction
- DMEM:
-
Dulbecco minimum essential medium
- MOI:
-
Multiplicity of infection
- ANOVA:
-
Analysis of Variance
- MTT:
-
3-(4,5-Cimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
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Zhang, L., Liu, X., Liang, J. et al. Lefty-1 inhibits renal epithelial–mesenchymal transition by antagonizing the TGF-β/Smad signaling pathway. J Mol Hist 51, 77–87 (2020). https://doi.org/10.1007/s10735-020-09859-8
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DOI: https://doi.org/10.1007/s10735-020-09859-8