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Related Experiment Videos

Engineered Exosomes as Vehicles for Biologically Active Proteins.

Ulrich Sterzenbach1, Ulrich Putz1, Ley-Hian Low2

  • 1The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria 3052, Australia.

Molecular Therapy : the Journal of the American Society of Gene Therapy
|April 17, 2017
PubMed
Summary

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Researchers engineered exosomes to deliver functional proteins into brain cells using a novel loading mechanism. This breakthrough in exosome engineering shows promise for treating brain diseases by enabling protein delivery across the blood-brain barrier.

Area of Science:

  • Biotechnology
  • Cell Biology
  • Neuroscience

Background:

  • Exosomes are promising for biomolecule delivery, but efficient loading methods are lacking.
  • The late-domain (L-domain) pathway is a conserved mechanism for protein trafficking.

Purpose of the Study:

  • To investigate the L-domain pathway for loading exogenous proteins into exosomes.
  • To demonstrate functional protein delivery via engineered exosomes in vitro and in vivo.

Main Methods:

  • Engineered Cre recombinase with a WW tag for recognition by Ndfip1.
  • Utilized Ndfip1 to mediate ubiquitination and exosomal packaging of WW-Cre.
  • Administered engineered exosomes nasally to reporter mice to assess brain delivery.

Main Results:

Keywords:
ESCRTL-domainblood-brain barrierdrug deliveryextracellular vesiclesintraluminal vesiclesnasal deliverytherapyubiquitin

Related Experiment Videos

  • WW-tagged Cre recombinase was successfully loaded into exosomes via the Ndfip1 pathway.
  • Exosomes delivered functional Cre recombinase to recipient cells, inducing DNA recombination.
  • Engineered exosomes were efficiently transported to neurons in multiple brain regions in vivo.

Conclusions:

  • The L-domain pathway provides a mechanism for engineering exosome cargo loading.
  • Nasally delivered engineered exosomes can cross the blood-brain barrier and deliver functional proteins to neurons.
  • This approach advances exosome-based therapeutics for brain diseases.