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Related Experiment Video

Updated: Sep 19, 2025

Scalable Biomanufacturing Workflow to Produce and Isolate Natural Killer Cell-Derived Extracellular Vesicle-Based Cancer Biotherapeutics
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Engineering of CD63 Enables Selective Extracellular Vesicle Cargo Loading and Enhanced Payload Delivery.

Wataru Obuchi1, Ayrton Zargani-Piccardi1, Kevin Leandro1,2

  • 1Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.

Journal of Extracellular Vesicles
|June 17, 2025
PubMed
Summary

Researchers engineered extracellular vesicles (EVs) for targeted therapeutic delivery. This novel E-NoMi system enhances cargo loading and functional delivery, improving therapeutic potential in vivo.

Keywords:
CRISPRCre recombinaseenveloped delivery vehiclesextracellular vesiclesgene therapyvirus‐like particles

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Area of Science:

  • Biotechnology
  • Cell Biology
  • Nanomedicine

Background:

  • Extracellular vesicles (EVs) mediate intercellular communication by transferring biomolecules.
  • Bioengineered EVs show therapeutic potential, but cargo loading remains a challenge.
  • Heterogeneity in EV cargo loading limits therapeutic applications.

Purpose of the Study:

  • To develop a method for enriching EVs with specific therapeutic payloads.
  • To engineer EVs for improved cargo loading and targeted delivery.
  • To validate the efficacy of engineered EVs in vivo.

Main Methods:

  • Engineered CD63 protein (E-NoMi) with internal mCherry and external 3xFLAG tag for EV enrichment.
  • Fusion of cargo proteins (EGFP, Cre, SaCas9) to nanobodies targeting mCherry for facilitated EV loading.
  • FLAG-tag immunocapture for selection of cargo-loaded E-NoMi-EVs.
  • Incorporation of VSV-G protein to create fusogenic EV-based vectors (EVVs).

Main Results:

  • E-NoMi system enabled enrichment of EVs with desired cargo.
  • FLAG-tag immunocapture successfully selected cargo-loaded E-NoMi-EVs.
  • Fusogenic EVVs demonstrated 10-fold higher cargo delivery efficiency compared to SEC-derived EVs.
  • Functional cargo delivery was validated in mouse brain models.

Conclusions:

  • Engineered CD63 (E-NoMi) facilitates efficient cargo loading into EVs.
  • Fusogenic EVVs are effective vectors for therapeutic payload delivery.
  • This platform holds promise for in vivo gene therapy applications.