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Updated: Apr 25, 2026

Tear-Derived Exosomal miR-15a as New Diagnostic Tool for Diabetic Retinopathy
Published on: December 30, 2025
Role of microRNAs in the modulation of diabetic retinopathy
Rodolfo Mastropasqua1, Lisa Toto2, Francesco Cipollone3
1Ophthalmology Clinic, Department of Neurological and Visual Science, University of Verona, Verona, Italy.
Abstract:
Diabetic retinopathy (DR) is the leading cause of vision loss in the working-age adults. It affects a third of diabetics. Diabetic macular edema, an advanced complication of DR, develops in nearly 7% of diabetic patients. MicroRNAs (miRNAs) are a novel group of non-coding small RNAs that post-transcriptionally control gene expression by promoting either degradation or translational repression of target messenger RNA. They are implicated in a large variety of physiological and pathophysiological processes, including glucose homeostasis, angiogenesis and modulation of inflammatory response. MiRNAs also play a critical role in the pathogenesis of diabetes and the related micro- and macrovascular complications. The purpose of this review is to describe the potential role of miRNAs in diabetes and evaluate their implication in DR. MiRNAs involved in the modulation of glucose metabolism (insulin secretion and sensitivity) and MiRNAs playing a role in the pathogenesis of DR with their potential target genes are reviewed. Understanding MiRNAs implication in DR could be helpful for developing new gain- or loss- of -function strategies in order to establish effective treatments and reduce the rate of visual disability due to progression of retinopathy.
Insights
MicroRNAs (miRNAs) are crucial in diabetic retinopathy (DR) development. Understanding their role in glucose metabolism and DR pathogenesis may lead to new treatments for this leading cause of vision loss.
Area of Science:
- Biochemistry
- Genetics
- Ophthalmology
Background:
- Diabetic retinopathy (DR) is a major cause of vision loss, affecting one-third of diabetic individuals.
- Diabetic macular edema, a severe DR complication, impacts nearly 7% of diabetic patients.
- MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression and involved in diabetes pathogenesis.
Purpose of the Study:
- To review the role of miRNAs in diabetes.
- To evaluate the implication of miRNAs in diabetic retinopathy (DR) pathogenesis.
- To identify miRNAs involved in glucose metabolism and DR, along with their target genes.
Main Methods:
- Literature review of studies on miRNAs in diabetes and diabetic retinopathy.
- Analysis of miRNAs involved in glucose metabolism (insulin secretion and sensitivity).
- Identification of miRNAs implicated in DR pathogenesis and their potential target genes.
Main Results:
- MiRNAs play a significant role in glucose homeostasis, including insulin secretion and sensitivity.
- Specific miRNAs are implicated in the pathogenesis of diabetic retinopathy.
- Potential target genes of these miRNAs in DR have been identified.
Conclusions:
- MiRNAs are critical players in the development of diabetes and its complications like DR.
- Further understanding of miRNA involvement in DR can guide the development of novel therapeutic strategies.
- Targeting miRNAs offers a promising avenue for preventing vision loss associated with diabetic retinopathy progression.
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