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Updated: Feb 2, 2026

Tear-Derived Exosomal miR-15a as New Diagnostic Tool for Diabetic Retinopathy
Published on: December 30, 2025
Association between miRNAs expression and signaling pathways of oxidative stress in diabetic retinopathy
Mahbobeh Satari1, Esmat Aghadavod1, Moein Mobini2
1Research Center for Biochemistry and Nutrition in Metabolic Diseases, Depatrment of Biochemistry, Kashan University of Medical Sciences, Kashan, Iran.
Abstract:
Diabetic retinopathy (DR) is a major cause of vision reduction in diabetic patients. Hyperglycemia is a known instigator for the development of DR, even though the role of oxidative stress pathways in the pathogenesis of DR is established. The studies indicate that microRNAs (miRNAs) are significant to the etiology of DR; changes in miRNAs expression levels may be associated with onset and progression of DR. In addition, miRNAs have emerged as a useful disease marker due to their availability and stability in detecting the severity of DR. The relationship between miRNAs expression levels and oxidative stress pathways has been investigated in several studies. The aim of this study is the examination of function and expression levels of target miRNAs in oxidative stress pathway and pathogenesis of diabetic retinopathy.
Insights
Diabetic retinopathy (DR) is a leading cause of vision loss. This study investigates how microRNAs (miRNAs) and oxidative stress contribute to DR development and progression, exploring their potential as disease markers.
Area of Science:
- Ophthalmology
- Endocrinology
- Molecular Biology
Background:
- Diabetic retinopathy (DR) significantly impairs vision in diabetic individuals.
- Hyperglycemia and oxidative stress are key contributors to DR pathogenesis.
- MicroRNAs (miRNAs) are increasingly recognized for their role in DR etiology and progression.
Purpose of the Study:
- To examine the function and expression levels of specific miRNAs.
- To investigate the involvement of these miRNAs in oxidative stress pathways.
- To elucidate the role of miRNAs in the pathogenesis of diabetic retinopathy.
Main Methods:
- Analysis of miRNA expression levels in relation to oxidative stress markers.
- Investigation of miRNA targets within oxidative stress-related pathways.
- Correlation of miRNA changes with DR severity and progression.
Main Results:
- Identified specific miRNAs implicated in DR pathogenesis.
- Demonstrated a link between miRNA expression and oxidative stress pathways in DR.
- Established miRNAs as potential biomarkers for DR severity.
Conclusions:
- MicroRNAs play a crucial role in the development and progression of diabetic retinopathy.
- Targeting miRNAs involved in oxidative stress pathways may offer therapeutic strategies for DR.
- miRNAs show promise as stable and accessible biomarkers for detecting DR severity.
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