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Scalable Biomanufacturing Workflow to Produce and Isolate Natural Killer Cell-Derived Extracellular Vesicle-Based Cancer Biotherapeutics
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Therapeutic effect of small extracellular vesicles from cytokine-induced memory-like natural killer cells on solid

Yinghong Shi1,2, Yanxia Chen1, Yi Wang3

  • 1Jiangsu Province Key Laboratory of Medical Science and Laboratory Medicine, Department of Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, 212013, China.

Journal of Nanobiotechnology
|July 29, 2024
PubMed

Insights

Memory-like NK cell-derived small extracellular vesicles (mNK-sEV) show potent anti-cancer effects. These mNK-sEV effectively target cancer cells, induce apoptosis, and demonstrate superior tumor inhibition compared to conventional NK cell-derived sEV.

Area of Science:

  • Immunology
  • Cell Biology
  • Biotechnology

Background:

  • Small extracellular vesicles (sEV) from natural killer (NK) cells possess antitumor properties.
  • sEV derived from human primary memory-like NK cells are underutilized in cancer therapy.
  • NK cells are crucial for innate immunity and cancer surveillance.

Purpose of the Study:

  • To investigate the therapeutic potential of sEV from cytokine-cultured human memory-like NK cells (mNK-sEV) for cancer treatment.
  • To compare the efficacy of mNK-sEV with sEV from conventionally cultured NK cells (conNK-sEV).
  • To elucidate the mechanism of action and tumor-targeting capabilities of mNK-sEV.

Main Methods:

  • Generation of mNK-sEV from IL-12, IL-15, and IL-18 stimulated human memory-like NK cells.
  • Assessment of mNK-sEV cellular uptake via macropinocytosis and induction of apoptosis through a caspase-dependent pathway.
  • In vivo evaluation of tumor growth inhibition, pharmacokinetics, and biodistribution in xenografted murine models.

Main Results:

  • mNK-sEV demonstrated enhanced antitumor activity compared to conNK-sEV.
  • mNK-sEV exhibited higher accumulation in tumors and superior inhibition of tumor growth in vivo.
  • Granulysin (GNLY) was identified as a key component potentially contributing to the enhanced therapeutic effect of mNK-sEV.

Conclusions:

  • mNK-sEV represent a promising novel therapeutic agent for effective cancer treatment.
  • The enhanced efficacy of mNK-sEV is attributed to their potent cytotoxic payload and improved tumor targeting.
  • Further development of mNK-sEV holds significant potential for advancing cancer immunotherapy.
Keywords:
Cancer therapyCytotoxicityGranulysinMemory-like natural killer cellsSmall extracellular vesicle

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