In vitro characterization and angiogenic potential of quality-and-quantity mononuclear cell-derived extracellular...

Area of Science:

• Cell Biology
• Biotechnology
• Regenerative Medicine

Background:

• Extracellular vesicles (EVs) are emerging as key mediators in cell-to-cell communication.
• Understanding the angiogenic potential of EVs derived from specific cell sources is crucial for therapeutic development.

Purpose of the Study:

• To evaluate the presence, production rate, and in vitro angiogenic properties of quality-and-quantity culture mononuclear cells-derived extracellular vesicles (QQMNC-EVs).

Main Methods:

• Peripheral blood mononuclear cells (PBMNCs) were cultured to generate QQMNCs.
• EVs were isolated from QQMNCs, PBMNCs, CD34+ cells, and late endothelial progenitor cells (EPCs).
• EV characterization involved nanoparticle tracking analysis, flow cytometry, western blot, and electron microscopy; angiogenic potential was assessed via tube formation assays.

Main Results:

• QQMNC-EVs were successfully identified and met established EV criteria.
• QQMNCs exhibited the highest EV production rate compared to other cell types.
• QQMNC-EVs demonstrated dose-dependent in vitro angiogenic efficacy, comparable to CD34+-EVs and late EPC-EVs at low concentrations and superior at high concentrations.

Conclusions:

• QQMNC-EVs possess significant in vitro angiogenic properties and high production rates.
• These findings suggest QQMNC-EVs hold potential as a novel therapeutic strategy for conditions like chronic limb-threatening ischemia.