Electrosprayed Mesenchymal Stromal Cell Extracellular Matrix Nanoparticles Accelerate Cellular Wound Healing and...

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Nanotechnology

Background:

• Acute respiratory distress syndrome (ARDS) lacks effective treatments, with mechanical ventilation posing risks of lung damage and infection.
• The COVID-19 pandemic has highlighted the urgent need for novel ARDS therapies.
• Mesenchymal stromal cells (MSCs) exhibit anti-inflammatory and regenerative properties, making them a potential therapeutic candidate for ARDS.

Purpose of the Study:

• To develop and characterize novel nanoparticles using mouse MSC-derived extracellular matrix (ECM) for ARDS treatment.
• To evaluate the pro-regenerative and antimicrobial potential of these MMSC ECM nanoparticles.
• To assess the biocompatibility and efficacy of MMSC ECM nanoparticles in lung injury models.

Main Methods:

• Characterization of MMSC ECM nanoparticles using size, zeta potential, and mass spectrometry.
• Assessment of nanoparticle biocompatibility with mouse lung epithelial cells and MMSCs.
• Evaluation of MMSC ECM nanoparticles' effect on human lung fibroblast wound healing and inhibition of *Pseudomonas aeruginosa* growth.

Main Results:

• MMSC ECM nanoparticles exhibited an average size of 273.4 nm with a negative zeta potential, facilitating lung tissue penetration.
• Nanoparticles demonstrated biocompatibility with relevant lung cells.
• Significant increase in human lung fibroblast wound healing rate and inhibition of *Pseudomonas aeruginosa* growth were observed.

Conclusions:

• MMSC ECM nanoparticles possess both pro-regenerative and antimicrobial properties beneficial for ARDS.
• These nanoparticles show potential for accelerating lung injury recovery and preventing secondary bacterial infections.
• Further research into MMSC ECM nanoparticles could lead to innovative ARDS treatments.