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MicroRNA-26a-5p Restoration Ameliorates Unilateral Ureteral Obstruction-Induced Renal Fibrosis in Mice Through Modulating TGF-β Signaling.
- Source :
-
Laboratory investigation; a journal of technical methods and pathology [Lab Invest] 2023 Jul; Vol. 103 (7), pp. 100131. Date of Electronic Publication: 2023 Mar 21. - Publication Year :
- 2023
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Abstract
- Renal fibrosis is a hallmark of chronic and progressive renal diseases characterized by excessive fibroblast proliferation, extracellular matrix accumulation, and a loss of renal function, eventually leading to end-stage renal diseases. MicroRNA-26a-5p (miR-26a-5p) downregulation has been previously noted in the sera of unilateral ureteral occlusion (UUO)-injured mice, and exosome-mediated miR-26a-5p reportedly attenuated experimental pulmonary and cardiac fibrosis. This study evaluated the expression patterns of miR-26a in a human tissue microarray with kidney fibrosis and in tissues from a mouse model of UUO-induced renal fibrosis. Histologic analyses showed that miR-26a-5p was downregulated in human and mouse tissues with renal interstitial nephritis and fibrosis. Moreover, miR-26a-5p restoration by intravenous injection of a mimic agent prominently suppressed the expression of transforming growth factor β1 (TGF-β1) and its cognate receptors, the inflammatory transcription factor NF-κB, epithelial-mesenchymal transition, and inflammatory markers in UUO-injured kidney tissues. In vitro, miR-26a-5p mimic delivery significantly inhibited TGF-β1-induced activation of cultured normal rat kidney NRK-49F cells, in terms of downregulation of TGF-β1 receptors, restoration of the epithelial marker E-cadherin, and suppression of mesenchymal markers, including vimentin, fibronectin, and α-smooth muscle actin, as well as TGF-β1/SMAD3 signaling activity. Our findings identified miR-26a-5p downregulation in kidney tissues with human interstitial nephritis and UUO-induced mouse kidney fibrosis. MiR-26a-5p restoration may exhibit an antifibrotic effect through the blockade of both TGF-β and NF-κB signaling axes and is considered a novel therapeutic target for treating obstruction-induced renal fibrosis.<br /> (Copyright © 2023 United States & Canadian Academy of Pathology. Published by Elsevier Inc. All rights reserved.)
- Subjects :
- Animals
Humans
Mice
Rats
Fibrosis
Kidney metabolism
NF-kappa B metabolism
Transforming Growth Factor beta pharmacology
Transforming Growth Factor beta1 metabolism
MicroRNAs metabolism
Nephritis, Interstitial metabolism
Nephritis, Interstitial pathology
Ureteral Obstruction complications
Ureteral Obstruction metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1530-0307
- Volume :
- 103
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Laboratory investigation; a journal of technical methods and pathology
- Publication Type :
- Academic Journal
- Accession number :
- 36948295
- Full Text :
- https://doi.org/10.1016/j.labinv.2023.100131