Evaluation of EV Storage Buffer for Efficient Preservation of Engineered Extracellular Vesicles

Area of Science:

• Biotechnology
• Cell Biology
• Nanomedicine

Background:

• Extracellular vesicles (EVs) are crucial for intercellular communication and hold promise for clinical diagnostics and therapeutics.
• Current challenges in EV clinical applications stem from a lack of standardized isolation, characterization, and storage methods.
• Existing storage techniques can compromise EV integrity and molecular cargo.

Purpose of the Study:

• To optimize extracellular vesicle (EV) storage conditions.
• To evaluate the impact of storage on EV integrity, molecular cargo protection, and functionality.
• To establish standardized protocols for reliable EV storage.

Main Methods:

• Evaluated various EV storage conditions.
• Characterized EVs based on experimental conditions and established models.
• Assessed EV integrity, size, particle number, and targeting functionality post-storage.

Main Results:

• Developed a highly efficient EV storage buffer.
• The optimized buffer significantly reduced variations in EV size and particle number at 4 °C and -80 °C.
• EVs stored in the optimized buffer demonstrated enhanced protection against biological, chemical, and mechanical damage.

Conclusions:

• The novel EV storage buffer effectively preserves EV integrity and molecular cargo.
• Optimized storage enhances the reliability of EV-based diagnostics and therapeutics.
• Standardized EV storage is critical for advancing clinical applications.