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@ARTICLE{Pahl:132942,
author = {J. Pahl$^*$ and J. Koch and J. Götz$^*$ and A. Arnold$^*$
and U. Reusch and T. Gantke and E. Rajkovic and M. Treder
and A. Cerwenka$^*$},
title = {{CD}16{A} {A}ctivation of {NK} {C}ells {P}romotes {NK}
{C}ell {P}roliferation and {M}emory-{L}ike {C}ytotoxicity
against {C}ancer {C}ells.},
journal = {Cancer immunology research},
volume = {6},
number = {5},
issn = {2326-6074},
address = {Philadelphia, Pa.},
publisher = {AACR},
reportid = {DKFZ-2018-00581},
pages = {517 - 527},
year = {2018},
abstract = {CD16A is a potent cytotoxicity receptor on human natural
killer (NK) cells, which can be exploited by therapeutic
bispecific antibodies. So far, the effects of CD16A-mediated
activation on NK cell effector functions beyond classical
antibody-dependent cytotoxicity have remained poorly
elucidated. Here, we investigated NK cell responses after
exposure to therapeutic antibodies such as the tetravalent
bispecific antibody AFM13 (CD30/CD16A), designed for the
treatment of Hodgkin lymphoma and other CD30+ lymphomas. Our
results reveal that CD16A engagement enhanced subsequent
IL2- and IL15-driven NK cell proliferation and expansion.
This effect involved the upregulation of CD25 (IL2Rα) and
CD132 (γc) on NK cells, resulting in increased sensitivity
to low-dose IL2 or to IL15. CD16A engagement initially
induced NK cell cytotoxicity. The lower NK cell reactivity
observed 1 day after CD16A engagement could be recovered by
reculture in IL2 or IL15. After reculture in IL2 or IL15,
these CD16A-experienced NK cells exerted more vigorous IFNγ
production upon restimulation with tumor cells or cytokines.
Importantly, after reculture, CD16A-experienced NK cells
also exerted increased cytotoxicity toward different tumor
targets, mainly through the activating NK cell receptor
NKG2D. Our findings uncover a role for CD16A engagement in
priming NK cell responses to restimulation by cytokines and
tumor cells, indicative of a memory-like functionality. Our
study suggests that combination of AFM13 with IL2 or IL15
may boost NK cell antitumor activity in patients by
expanding tumor-reactive NK cells and enhancing NK cell
reactivity, even upon repeated tumor encounters. Cancer
Immunol Res; 6(5); 517-27. ©2018 AACR.},
cin = {D080},
ddc = {610},
cid = {I:(DE-He78)D080-20160331},
pnm = {314 - Tumor immunology (POF3-314)},
pid = {G:(DE-HGF)POF3-314},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29514797},
doi = {10.1158/2326-6066.CIR-17-0550},
url = {https://inrepo02.dkfz.de/record/132942},
}