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@ARTICLE{Srchen:274486,
author = {V. Särchen and L. M. Reindl and S. Wiedemann and S.
Shanmugalingam and T. Bukur and J. Becker and M. Suchan and
E. Ullrich$^*$ and M. Vogler$^*$},
title = {{C}haracterization of {BV}6-{I}nduced {S}ensitization to
the {NK} {C}ell {K}illing of {P}ediatric {R}habdomyosarcoma
{S}pheroids.},
journal = {Cells},
volume = {12},
number = {6},
issn = {2073-4409},
address = {Basel},
publisher = {MDPI},
reportid = {DKFZ-2023-00629},
pages = {906},
year = {2023},
abstract = {Although the overall survival in pediatric rhabdomyosarcoma
(RMS) has increased over the last decades, the most
aggressive subtype of alveolar RMS is in dire need of novel
treatment strategies. RMS cells evade cell death induction
and immune control by increasing the expression of
inhibitors of apoptosis proteins (IAPs), which can be
exploited and targeted with stimulation with Smac mimetics.
Here, we used the Smac mimetic BV6 to re-sensitize RMS
spheroids to cell death, which increased killing induced by
natural killer (NK) cells. Single BV6 treatment of RMS
spheroids did not reduce spheroidal growth. However, we
observed significant spheroidal decomposition upon BV6
pre-treatment combined with NK cell co-cultivation.
Molecularly, IAPs s are rapidly degraded by BV6, which
activates NF-κB signal transduction pathways in RMS
spheroids. RNA sequencing analysis validated NF-κB
activation and identified a plethora of BV6-regulated genes.
Additionally, BV6 released caspases from IAP-mediated
inhibition. Here, caspase-8 might play a major role, as
knockdown experiments resulted in decreased NK cell-mediated
attack. Taken together, we improved the understanding of the
BV6 mechanism of RMS spheroid sensitization to cytotoxic
immune cells, which could be suitable for the development of
novel combinatory cellular immunotherapy with Smac
mimetics.},
keywords = {BV6 (Other) / NK cells (Other) / Smac mimetic (Other) /
cell death (Other) / rhabdomyosarcoma (Other) / tumor
spheroids (Other)},
cin = {FM01},
ddc = {570},
cid = {I:(DE-He78)FM01-20160331},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:36980247},
doi = {10.3390/cells12060906},
url = {https://inrepo02.dkfz.de/record/274486},
}