Crosstalk between MicroRNA and Oxidative Stress in Primary Open-Angle Glaucoma.

Area of Science:

• Ophthalmology
• Molecular Biology
• Genetics

Background:

• Primary open-angle glaucoma (POAG) is a neurodegenerative disease damaging retinal ganglion cells and the optic nerve, often linked to oxidative stress.
• Reactive oxygen species (ROS) contribute to POAG pathogenesis by affecting trabecular meshwork (TM) cells and extracellular matrix (ECM) balance.
• Elevated intraocular pressure (IOP) and aqueous humor (AH) outflow resistance are key factors in POAG progression, with current treatments having limitations.

Purpose of the Study:

• To investigate the role of microRNAs (miRNAs) in regulating genes and proteins involved in inflammation and degeneration in POAG.
• To explore how miRNAs influence the synthesis and deposition of ECM under chronic oxidative stress in POAG tissues.
• To identify potential therapeutic strategies targeting miRNAs for POAG treatment.

Main Methods:

• Review of literature on miRNA involvement in POAG pathogenesis.
• Analysis of miRNA-mediated regulation of key signaling pathways (NF-kB, TGF-β2, Wnt/β-Catenin, PI3K/AKT, mTOR).
• Examination of miRNA effects on ECM deposition, collagen degradation, and mitochondrial function in TM cells.

Main Results:

• Certain miRNAs effectively downregulate pro-inflammatory and pro-fibrotic pathways, including NF-kB and TGF-β2.
• Specific miRNAs stimulate Collagen type I degradation, preventing ECM deposition and potentially reducing IOP.
• miRNAs were shown to suppress mitochondrial dysfunction and modulate oxidative damage by affecting pathways like mTOR.

Conclusions:

• MicroRNAs represent promising therapeutic targets for mitigating oxidative stress injury in POAG.
• Targeting specific miRNAs could offer novel treatment approaches for POAG by addressing inflammation, fibrosis, and oxidative damage.
• Further research into miRNA-based therapies may lead to effective interventions for preventing vision loss in POAG patients.