QMR^® and Patient Blood-Derived Secretome Modulate RPE microRNA Networks Under Oxidative Stress

Area of Science:

• Ophthalmology
• Molecular Biology
• Regenerative Medicine

Background:

• Oxidative stress disrupts microRNA (miRNA) balance in retinal pigment epithelium (RPE), contributing to apoptosis and epithelial-to-mesenchymal transition in age-related macular degeneration (AMD).
• Current treatments for retinal degeneration often lack efficacy or involve invasive procedures.

Purpose of the Study:

• To investigate the effects of Quantum Molecular Resonance (QMR®) electrostimulation and Patient Blood-Derived (PBD) secretome on RPE cell miRNome reprogramming.
• To assess the potential of these therapies in mitigating oxidative stress-induced damage in RPE cells.

Main Methods:

• Human ARPE-19 cells were subjected to oxidative stress using tert-butyl-hydroperoxide.
• Cells were treated with QMR® electrostimulation, PBD secretome, or a combination of both.
• Deep sequencing of small RNAs was performed at 24 and 72 hours, followed by differential expression and pathway enrichment analyses.

Main Results:

• Oxidative stress altered over 50 miRNAs, activating pro-apoptotic, fibrotic, and inflammatory pathways.
• QMR® partially restored miRNA homeostasis and upregulated cytoprotective miRNAs like miR-590-3p.
• PBD secretome increased anti-inflammatory miR-146a-5p and regenerative miR-204-5p, while suppressing pro-fibrotic let-7f-5p.
• Combined QMR® + PBD secretome treatment normalized over two-thirds of stress-altered miRNAs, influencing antioxidant, anti-apoptotic, and anti-fibrotic pathways.

Conclusions:

• QMR® electrostimulation and PBD secretome modulate distinct yet complementary miRNA programs involved in cellular stress response.
• These cell-free strategies show potential for treating retinal degeneration, including AMD, by reprogramming the RPE miRNome.
• Further in vivo validation is necessary to confirm therapeutic benefits and clinical translation.