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Data · dataset · 2026

Video 1_Neutrophils suppress adaptive αβ T cells but not the innate γδ T cells and natural killer cells.avi

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<p>The presence of polymorphonuclear neutrophils (PMNs) in the tumor microenvironment is associated with lower survival rates for cancer patients.

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Presumably due to the immunosuppressive activity of neutrophils (also known as Myeloid-Derived Suppressor Cell (MDSC) activity). We investigated whether this MDSC activity shows any selectivity in suppressing specific lymphocyte subsets.

Our data show that CD4<sup>+</sup> and CD8<sup>+</sup> T cells, both naive and memory fractions, are sensitive to PMN-MDSC activity. Similarly, regulatory T cells, believed to play an important immunosuppressive function themselves, were affected too. In contrast, the more innate-like γδ T cells and Natural Killer (NK) cells were left intact.

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Our data suggest that Chimeric Antigen Receptor (CAR)-NK and γδ CAR-T cell immunotherapy may be less susceptible to PMN-MDSC activity. Therefore, using such MDSC-resistant innate cells as cellular products may be of advantage over the common αβ CAR-T cell therapies. Additionally, further deciphering the exact mechanisms by which neutrophils suppress αβ T cells could lead to improved T cell immunotherapies.</p>

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