MicroRNAs and fibrosis
Vishal Patel1, Lama Noureddine
1Division of Nephrology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA. Vishald.patel@utsouthwestern.edu
Purpose Of Review:
MicroRNAs (miRNAs) are short noncoding RNAs that inhibit gene expression in plants and animals. miRNAs have emerged as key players in virtually all aspects of mammalian biology. Aberrant miRNA expression is observed in numerous human diseases such as diabetes, hypercholesterolemia, cancer, and tissue fibrosis. Therefore, approaches to correct miRNA expression represent the novel therapeutic strategies for these diseases.
Recent Findings:
miRNAs are essential for kidney development and homeostasis. Aberrant miRNA expression is observed in the mouse models of kidney fibrosis. Three TGF-β-regulated miRNA families, miR-21, miR-200, and miR-29 have been shown to modulate renal fibrosis. miR-21, through a feed-forward loop, amplifies TGF-β signaling and promotes fibrosis. Conversely, miR-200 and miR-29 reduce fibrosis by inhibiting epithelial-to-mesenchymal transition and preventing the deposition of extracellular matrix, respectively. Inhibition of miR-21 expression or augmenting miR-29 expression prevents kidney fibrosis in mice.
Summary:
Aberrant miRNA expression perturbs signaling pathways that lead to progression of kidney fibrosis. Thus, miRNAs represent novel biomarkers and therapeutic targets in the treatment of kidney fibrosis.
Insights
MicroRNAs (miRNAs) are crucial for kidney function. Targeting specific miRNAs, like inhibiting miR-21 or increasing miR-29, shows promise in preventing and treating kidney fibrosis.
Area of Science:
- Molecular Biology
- Genetics
- Nephrology
Background:
- MicroRNAs (miRNAs) are short noncoding RNAs regulating gene expression in mammals.
- Dysregulated miRNA expression is linked to various human diseases, including kidney fibrosis.
- miRNAs are vital for kidney development and maintaining homeostasis.
Purpose of the Study:
- To investigate the role of specific microRNAs in kidney fibrosis.
- To explore the therapeutic potential of modulating miRNA expression for kidney fibrosis treatment.
Main Methods:
- Analysis of miRNA expression in mouse models of kidney fibrosis.
- Investigating the mechanisms of TGF-β-regulated miRNAs (miR-21, miR-200, miR-29) in renal fibrosis.
- Evaluating the effects of inhibiting miR-21 or augmenting miR-29 in preventing kidney fibrosis in mice.
Main Results:
- Aberrant miRNA expression, particularly miR-21, miR-200, and miR-29 families, is observed in kidney fibrosis models.
- miR-21 amplifies TGF-β signaling, promoting fibrosis through a feed-forward loop.
- miR-200 and miR-29 counteract fibrosis by inhibiting epithelial-to-mesenchymal transition and extracellular matrix deposition, respectively.
- Inhibition of miR-21 or augmentation of miR-29 effectively prevents kidney fibrosis in mice.
Conclusions:
- Altered miRNA expression disrupts signaling pathways, driving kidney fibrosis progression.
- miRNAs serve as potential biomarkers for kidney fibrosis.
- Modulating miRNA expression offers a novel therapeutic strategy for kidney fibrosis.
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