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Related Experiment Video

Updated: Nov 26, 2025

Cell Squeezing as a Robust, Microfluidic Intracellular Delivery Platform
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Programmable Extracellular Vesicles for Macromolecule Delivery and Genome Modifications.

Xiaojuan Zhang1, Quanbin Xu1, Zhike Zi2

  • 1Department of Biochemistry, University of Colorado, Boulder, CO 80303, USA.

Developmental Cell
|December 9, 2020
PubMed
Summary

Researchers developed Gectosomes, engineered ectosomes for delivering large molecules like proteins and ribonucleoproteins (RNPs) into cells and tissues. This novel method enhances cargo loading and specificity, offering new therapeutic possibilities.

Keywords:
GectosomesPCSK9PINK1VSV-Gexosomesgenome editingmacromolecule deliverymass spectrometrymathematical modelingsplit GFP

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Area of Science:

  • Biotechnology
  • Cell Biology
  • Molecular Medicine

Background:

  • Delivering large macromolecules across cellular barriers is a significant hurdle in biological research and therapeutics.
  • Existing methods often face challenges with efficiency and specificity.

Purpose of the Study:

  • To develop a generalizable method for delivering proteins and ribonucleoproteins (RNPs) into cells and tissues.
  • To engineer ectosomes, termed 'Gectosomes,' for enhanced macromolecule delivery.

Main Methods:

  • Engineered ectosomes (Gectosomes) co-encapsulating vesicular stomatitis virus G protein (VSV-G) with macromolecules using split GFP complementation.
  • Utilized experimental and mathematical modeling to analyze cargo loading and specificity.
  • Demonstrated delivery of Cre, Ago2, and SaCas9 using Gectosomes.

Main Results:

  • Gectosomes enable active cargo loading, improving specific activity and facilitating purification.
  • Active loading reduces non-specific encapsulation of cellular proteins, especially nucleic-acid-binding proteins.
  • Successfully demonstrated gene modification in cell lines and mouse liver tissue in vivo.

Conclusions:

  • Gectosome technology provides an effective platform for delivering large bioactive macromolecules.
  • This method holds promise for therapeutic applications targeting a variety of human diseases.
  • The approach facilitates precise genetic modifications in vitro and in vivo.