Rapid isolation method for extracellular vesicles based on Fe₃O₄@ZrO₂

Area of Science:

• Biotechnology
• Nanotechnology
• Biochemistry

Background:

• Extracellular vesicles (EVs) are crucial for cell-to-cell communication and implicated in disease.
• Current EVs isolation methods face challenges in yield, purity, reproducibility, cost, time, and automation.

Purpose of the Study:

• To develop and validate a novel, efficient, and automatable method for extracellular vesicle isolation.
• To assess the performance of the new method in terms of capture efficiency, purity, and reproducibility.

Main Methods:

• Utilized Fe3O4@ZrO2 magnetic beads for EVs isolation based on ZrO2-phosphate interaction.
• Evaluated the method's efficiency, purity, and reproducibility against ultracentrifugation.
• Analyzed miRNA expression in isolated EVs from urine samples.
• Developed a logistic regression model for diagnostic potential.

Main Results:

• Efficient EVs separation from large sample volumes in 30 minutes without preconcentration.
• Achieved high capture efficiency (74%-78%), purity (97%), and reproducibility (0.3%-0.5%).
• Demonstrated excellent linearity (R² > 0.99) and diagnostic potential with AUC of 0.961.

Conclusions:

• The magnetic bead-based method offers a rapid, efficient, and reliable approach for EVs isolation.
• This technique shows significant promise for advancing EVs research and clinical applications, including diagnostics.
• The method's potential for automation addresses key limitations of existing EVs isolation protocols.