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Aptamer-Engineered Natural Killer Cells for Cell-Specific Adaptive Immunotherapy

Shuanghui Yang1,2, Jianguo Wen2, Huan Li2,3

  • 1Department of Hematology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.

Small (Weinheim an Der Bergstrasse, Germany)
|April 27, 2019
PubMed

Insights

Natural killer (NK) cells engineered with aptamers (ApEn-NK) can specifically target and kill lymphoma cells. This novel approach enhances targeted cancer immunotherapy without genetic modification.

Area of Science:

  • Immunology
  • Biotechnology
  • Oncology

Background:

  • Natural killer (NK) cells are crucial for innate immunity against cancer but lack inherent target specificity for immunotherapy.
  • Aptamers, oligonucleotide analogs of antibodies, offer high affinity and specificity for target recognition.

Purpose of the Study:

  • To develop aptamer-engineered NK cells (ApEn-NK) for targeted cancer immunotherapy.
  • To evaluate the efficacy of ApEn-NK in specifically binding and eliminating CD30-expressing lymphoma cells.

Main Methods:

  • Synthetic CD30-specific aptamers were surface-anchored onto NK cells to create ApEn-NK without genetic alteration.
  • ApEn-NK binding specificity and lymphoma cell apoptosis rates were assessed in vitro and with primary human NK cells.

Main Results:

  • ApEn-NK demonstrated specific binding to CD30-expressing lymphoma cells, avoiding off-target interactions.
  • ApEn-NK induced significantly higher apoptosis/death rates in lymphoma cells compared to unmodified NK cells.
  • Experiments with primary human NK cells confirmed the targeted killing potential of ApEn-NK.

Conclusions:

  • Aptamer engineering provides a non-genetic method to confer target specificity to NK cells.
  • ApEn-NK represents a promising strategy for targeted immunotherapy of CD30-positive lymphomas.
  • This approach holds potential for advancing NK cell-based cancer therapies.
Keywords:
adaptive immunotherapyaptamer-engineeringlymphomanatural killer (NK) cellsoligonucleotide aptamers

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