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Related Experiment Video

Updated: Feb 2, 2026

Transfer of Mammary Gland-forming Ability Between Mammary Basal Epithelial Cells and Mammary Luminal Cells via Extracellular Vesicles/Exosomes
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Reprogramming Exosomes as Nanoscale Controllers of Cellular Immunity.

Qinqin Cheng1, Xiaojing Shi1, Menglu Han1

  • 1Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy , University of Southern California , Los Angeles , California 90089 , United States.

Journal of the American Chemical Society
|November 20, 2018
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Researchers engineered exosomes to target cancer cells, redirecting immune T cells for effective cancer killing. This novel nanomedicine approach, synthetic multivalent antibodies retargeted exosomes (SMART-Exos), shows promise for cell-free cancer immunotherapy.

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Area of Science:

  • Nanomedicine
  • Immunology
  • Oncology

Background:

  • Exosomes are natural vesicles with therapeutic potential.
  • Current nanomedicine relies on efficient delivery of therapeutics.
  • Cellular immunity, particularly cytotoxic T cells, is crucial for cancer killing.

Purpose of the Study:

  • To explore endogenously derived exosomes as controllers of cellular immunity.
  • To redirect and activate cytotoxic T cells towards cancer cells.
  • To develop a novel cancer immunotherapy approach using engineered exosomes.

Main Methods:

  • Genetically displaying two distinct antibodies on exosome surfaces.
  • Creating synthetic multivalent antibodies retargeted exosomes (SMART-Exos).
  • Utilizing antibodies targeting T-cell CD3 and cancer cell-associated epidermal growth factor receptor (EGFR).

Main Results:

  • SMART-Exos induced cross-linking of T cells and EGFR-expressing cancer cells.
  • Demonstrated potent antitumor immunity in vitro and in vivo.
  • Validated the concept of using engineered exosomes for cancer immunotherapy.

Conclusions:

  • Engineered exosomes can act as artificial controllers of cellular immunity.
  • SMART-Exos offer a novel and versatile approach for cancer immunotherapy.
  • This study paves the way for a new class of cell-free cancer therapies.