Snorkel-tag based affinity chromatography for recombinant extracellular vesicle purification

Area of Science:

• Biotechnology
• Cell Biology
• Nanomedicine

Background:

• Extracellular vesicles (EVs) are crucial for cell-cell communication and hold therapeutic potential.
• Current limitations in EV production, tracing, and analytics hinder their clinical application.
• Existing methods offer only partial insights into EV cargo and function.

Purpose of the Study:

• To develop a novel tool for enhanced extracellular vesicle (EV) production and analysis.
• To enable non-destructive purification of EVs from complex biological samples.
• To facilitate the engineering of EVs for targeted drug delivery and research.

Main Methods:

• Genetically fusing the CD81 EV surface marker to a series of tags with a transmembrane domain (Snorkel-tag).
• Utilizing the Snorkel-tag for affinity purification of EVs from complex matrices.
• Characterizing purified EVs for surface protein profiles, miRNA patterns, and cellular uptake.

Main Results:

• The Snorkel-tag system allows for non-destructive EV purification while preserving EV characteristics.
• Purified EVs maintained their surface protein profiles and associated miRNA patterns.
• EVs produced using the Snorkel-tag system demonstrated effective uptake into a model cell line.

Conclusions:

• The Snorkel-tag is a versatile tool for advancing extracellular vesicle (EV) research.
• It enables efficient preparation of EV standards and reference materials.
• The system facilitates the study of EVs with specific surface markers for in vitro and in vivo applications.