دورية أكاديمية
TLR9 agonism differentially impacts human NK cell-mediated direct killing and antibody-dependent cell-mediated cytotoxicity
| العنوان: | TLR9 agonism differentially impacts human NK cell-mediated direct killing and antibody-dependent cell-mediated cytotoxicity |
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| المؤلفون: | Anna R. Mahr, Maia M. C. Bennett-Boehm, Frederik H. Rothemejer, Isabelle S. Weber, Alexander K. Regan, Josh Q. Franzen, Cami R. Bisson, Angela N. Truong, Rikke Olesen, Mariane H. Schleimann, Claudia M. Rauter, Audrey L. Smith, Dalia El-Gamal, Ole S. Søgaard, Martin Tolstrup, Paul W. Denton |
| المصدر: | Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024) |
| بيانات النشر: | Nature Portfolio, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Medicine LCC:Science |
| مصطلحات موضوعية: | Human NK cells, Direct killing, ADCC, TLR9 agonist, Immunophenotyping, Medicine, Science |
| الوصف: | Abstract There are two known mechanisms by which natural killer (NK) cells recognize and kill diseased targets: (i) direct killing and (ii) antibody-dependent cell-mediated cytotoxicity (ADCC). We investigated an indirect NK cell activation strategy for the enhancement of human NK cell killing function. We did this by leveraging the fact that toll-like receptor 9 (TLR9) agonism within pools of human peripheral blood mononuclear cells (PBMCs) results in a robust interferon signaling cascade that leads to NK cell activation. After TLR9 agonist stimulation, NK cells were enriched and incorporated into assays to assess their ability to kill tumor cell line targets. Notably, differential impacts of TLR9 agonism were observed—direct killing was enhanced while ADCC was not increased. To ensure that the observed differential effects were not attributable to differences between human donors, we recapitulated the observation using our Natural Killer—Simultaneous ADCC and Direct Killing Assay (NK-SADKA) that controls for human-to-human differences. Next, we observed a treatment-induced decrease in NK cell surface CD16—known to be shed by NK cells post-activation. Given the essential role of CD16 in ADCC, such shedding could account for the observed differential impact of TLR9 agonism on NK cell-mediated killing capacity. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2045-2322 36865354 |
| Relation: | https://doaj.org/toc/2045-2322 |
| DOI: | 10.1038/s41598-024-65576-2 |
| URL الوصول: | https://doaj.org/article/85906b314a2a4acaaca1f37e36865354 |
| رقم الأكسشن: | edsdoj.85906b314a2a4acaaca1f37e36865354 |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 20452322 36865354 |
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| DOI: | 10.1038/s41598-024-65576-2 |