A Chemical Framework for Engineering Extracellular Vesicles' Biointerface to Advance Precision Therapeutics

Area of Science:

• Biotechnology
• Nanomedicine
• Cell Biology

Background:

• Extracellular vesicles (EVs) are nanoparticles secreted by cells, involved in physiological and pathological processes.
• EVs show promise as biomarkers and for applications in tissue engineering and drug delivery due to their biomimetic nature.
• EV surface chemistry is critical for their function and interactions.

Purpose of the Study:

• To introduce a comprehensive, chemistry-centric framework for engineering the surface of extracellular vesicles (EVs).
• To integrate existing and novel surface modification strategies for enhanced EV functionality.
• To explore the translational potential of engineered EVs for therapeutic advancements.

Main Methods:

• Review and integration of genetic, metabolic, physical, and chemical approaches for EV surface modification.
• Application of protein- and cell-surface chemistry principles to EV engineering.
• Analysis of functional scope and translational potential of various EV surface modification strategies.

Main Results:

• A systematic framework for EV surface engineering is proposed, categorizing modification strategies.
• The framework highlights methods to enhance cargo delivery, target specificity, immune evasion, and tracking.
• It identifies opportunities for applying new chemistries to EV surfaces.

Conclusions:

• Surface engineering of EVs is crucial for optimizing their therapeutic potential.
• The proposed chemistry-centric framework provides a roadmap for developing advanced EV-based therapeutics.
• Further research integrating diverse surface chemistries can unlock novel EV applications.