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Related Experiment Video

Updated: Jun 22, 2025

Direct Stochastic Optical Reconstruction Microscopy of Extracellular Vesicles in Three Dimensions

Direct Stochastic Optical Reconstruction Microscopy of Extracellular Vesicles in Three Dimensions

Published on: August 26, 2021

Extracellular Vesicle Spherical Nucleic Acids.

Hao Chen^1,2, Qiaojiao Ding³, Lin Li¹

¹Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology, Ningbo Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315300, China.

|June 28, 2024

Summary

This summary is machine-generated.

Researchers developed extracellular vesicle spherical nucleic acid (EV-SNA) nanostructures for enhanced drug delivery. These novel EV-SNAs offer improved biocompatibility and cellular delivery, paving the way for advanced nanomedicine applications.

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Last Updated: Jun 22, 2025

Direct Stochastic Optical Reconstruction Microscopy of Extracellular Vesicles in Three Dimensions

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Published on: July 26, 2022

Area of Science:

Biomaterials Science
Nanotechnology
Molecular Biology

Background:

Extracellular vesicles (EVs) are natural cell-secreted nanoparticles with therapeutic potential.
Current limitations in EV manipulation and delivery hinder their clinical application.
A need exists for robust and programmable nanostructures for efficient EV-based therapies.

Purpose of the Study:

To develop a novel nanostructure, extracellular vesicle spherical nucleic acid (EV-SNA), for enhanced cellular delivery.
To engineer programmable and scalable EV-based nanocarriers.
To improve the delivery efficiency and biocompatibility of nucleic acid therapeutics.

Main Methods:

Constructed EV-SNA through hydrophobic coassembly of natural EVs with cholesterol-modified oligonucleotides.
Utilized programmable nucleic acid shells responding to AND logic gates for vesicle assembly control.
Evaluated EV-SNA stability, cellular delivery enhancement, and biocompatibility compared to artificial liposomal SNA.

Main Results:

EV-SNA demonstrated stability for 1 month at room temperature.
Achieved 10-20 times enhancement in cellular delivery capability using various EV sources.
EV-SNA showed superior biocompatibility and more effective delivery of antisense oligonucleotides in primary stem cells.
Demonstrated EV-SNA's capability for delivering functional EVs for immune regulation.

Conclusions:

EV-SNA represents a scalable, programmable, and highly efficient nanostructure for EV-based applications.
This novel platform enhances the delivery of nucleic acid therapeutics, particularly in challenging cell types.
EV-SNA holds significant promise for advancing drug delivery, nanovaccines, and regenerative medicine.