miRNA-1273g-3p Involvement in Development of Diabetic Retinopathy by Modulating the Autophagy-Lysosome Pathway.

Area of Science:

• Ophthalmology
• Molecular Biology
• Cell Biology

Background:

• Diabetic retinopathy (DR) is a severe complication of diabetes mellitus (DM).
• Autophagy-lysosome pathway (ALP) dysfunction is implicated in early DR pathogenesis.
• Autophagy modulation presents a potential therapeutic avenue for DR.

Purpose of the Study:

• To investigate the role of a differentially expressed microRNA, miR-1273g-3p, in DR.
• To determine the impact of miR-1273g-3p on the autophagy-lysosome pathway in DR.

Main Methods:

• Screening of differentially expressed miRNAs in streptozotocin (STZ)-induced DR rat retinal pigment epithelial (RPE) cells.
• Treatment of RPE cells with miR-1273g-3p inhibitors and mimics.
• Quantitative reverse transcription PCR (QRT-PCR) and Western blot analysis to assess protein expression.

Main Results:

• miR-1273g-3p was upregulated in STZ-induced DR RPE cells.
• miR-1273g-3p mimic increased expression of DR markers (MMP-2, MMP-9, TNF-α) and ALP factors (LC3, cathepsin B, cathepsin L).
• miR-1273g-3p inhibitor decreased the expression of these factors.

Conclusions:

• miR-1273g-3p plays a role in DR progression by modulating the autophagy-lysosome pathway.
• This study highlights a significant link between DR and ALP.
• miR-1273g-3p emerges as a potential therapeutic target for diabetic retinopathy.