Extracellular Vesicle-Associated miR-ERIA Exerts the Antiangiogenic Effect of Macrophages in Diabetic Wound Healing

Area of Science:

• Cell biology
• Molecular biology
• Dermatology

Background:

• Diabetic cutaneous ulcers pose a significant clinical challenge.
• Understanding cellular interactions is crucial for identifying therapeutic targets.
• Macrophage-derived extracellular vesicles (EVs) can influence wound healing.

Purpose of the Study:

• To investigate the role of extracellular vesicles (EVs) from macrophages treated with advanced glycation end products (AGEs) in diabetic cutaneous ulcer pathogenesis.
• To identify specific molecular mediators within these EVs that affect vascular endothelial cell function.

Main Methods:

• Macrophages were treated with AGEs to generate AGEs-EVs.
• Extracellular vesicles (EVs) were isolated and characterized.
• A novel microRNA (miRNA), designated miR-ERIA, was identified as enriched in AGEs-EVs.
• The effect of miR-ERIA on vascular endothelial cell migration and tube formation was assessed.
• The target gene of miR-ERIA was identified as helicase with zinc finger 2.

Main Results:

• AGEs-EVs were found to suppress diabetic cutaneous wound healing.
• A novel miRNA, miR-ERIA, was significantly enriched in AGEs-EVs.
• miR-ERIA was demonstrated to suppress the migration and tube formation of vascular endothelial cells.
• Helicase with zinc finger 2 was identified as a direct target of miR-ERIA.

Conclusions:

• A novel miRNA, miR-ERIA, enriched in AGEs-EVs, plays a suppressive role in vascular endothelial cell function, contributing to impaired diabetic wound healing.
• miR-ERIA represents a potential therapeutic target for the treatment of diabetic cutaneous ulcers.