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


ABSTRACT: Natural killer (NK) cells are a key component of the innate immune system as they can attack cancer cells without prior sensitization. However, due to lack of cell-specific receptors, NK cells are not innately able to perform targeted cancer immunotherapy. Aptamers are short single-stranded oligonucleotides that specifically recognize their targets with high affinity in a similar manner to antibodies. To render NK cells with target-specificity, synthetic CD30-specific aptamers are anchored on cell surfaces to produce aptamer-engineered NK cells (ApEn-NK) without genetic alteration or cell damage. Under surface-anchored aptamer guidance, ApEn-NK specifically bind to CD30-expressing lymphoma cells but do not react to off-target cells. The resulting specific cell binding of ApEn-NK triggers higher apoptosis/death rates of lymphoma cells compared to parental NK cells. Additionally, experiments with primary human NK cells demonstrate the potential of ApEn-NK to specifically target and kill lymphoma cells, thus presenting a potential new approach for targeted immunotherapy by NK cells.

SUBMITTER: Yang S 

PROVIDER: S-EPMC6541510 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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

Yang Shuanghui S   Wen Jianguo J   Li Huan H   Xu Ling L   Liu Yanting Y   Zhao Nianxi N   Zeng Zihua Z   Qi Jianjun J   Jiang Wenqi W   Han Wei W   Zu Youli Y  

Small (Weinheim an der Bergstrasse, Germany) 20190426 22


Natural killer (NK) cells are a key component of the innate immune system as they can attack cancer cells without prior sensitization. However, due to lack of cell-specific receptors, NK cells are not innately able to perform targeted cancer immunotherapy. Aptamers are short single-stranded oligonucleotides that specifically recognize their targets with high affinity in a similar manner to antibodies. To render NK cells with target-specificity, synthetic CD30-specific aptamers are anchored on ce  ...[more]

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