Capturing the RNA castle: Exploiting MicroRNA inhibition for wound healing

Area of Science:

• Biochemistry
• Molecular Biology
• Regenerative Medicine

Background:

• RNA-based therapies, particularly microRNA (miRNA) modulation, offer novel treatment strategies for complex disorders like chronic nonhealing diabetic wounds.
• miRNAs play critical roles in cutaneous wound repair, with both enhancement (mimics) and inhibition (antisense oligonucleotides) being viable therapeutic approaches.

Purpose of the Study:

• This review focuses on miRNA inhibition strategies, specifically antisense miRNA (anti-miR) oligonucleotides, to promote skin repair in the context of chronic wounds.
• The review explores the potential of inhibiting specific miRNAs in keratinocytes to enhance migration and in endothelial cells to promote neovascularization.

Main Methods:

• Review of current literature on miRNA inhibition strategies for wound healing.
• Focus on advances in chemical modifications of antisense oligonucleotides (anti-miRs) to improve their performance.
• Analysis of studies investigating miRNA inhibition in keratinocytes and endothelial cells in diabetic wound models.

Main Results:

• Inhibition of specific miRNAs in keratinocytes can promote keratinocyte migration, a key step in re-epithelialization.
• Targeting certain miRNAs in endothelial cells may enhance neovascularization, crucial for wound healing.
• The efficacy of different anti-miR modifications and the relative impact of inhibiting various miRNAs require direct comparison.

Conclusions:

• Direct comparisons of anti-miR modifications are necessary to identify translationally viable options for the chronic wound environment.
• Quantifying and ranking the efficacies of inhibiting different miRNAs is essential for optimizing therapeutic strategies.
• Development of standardized human ex vivo models for diabetic wounds is needed to reduce reliance on mouse models and improve mechanistic understanding.