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@ARTICLE{Vermeulen:132521,
author = {J. F. Vermeulen and W. Van Hecke and E. J. M. Adriaansen
and M. K. Jansen and R. G. Bouma and J. Villacorta Hidalgo
and P. Fisch and R. Broekhuizen and W. G. M. Spliet and M.
Kool$^*$ and N. Bovenschen},
title = {{P}rognostic relevance of tumor-infiltrating lymphocytes
and immune checkpoints in pediatric medulloblastoma.},
journal = {OncoImmunology},
volume = {7},
number = {3},
issn = {2162-402X},
address = {Austin, Tex.},
publisher = {Landes Bioscience},
reportid = {DKFZ-2018-00207},
pages = {e1398877 -},
year = {2018},
abstract = {Pediatric medulloblastomas are the most frequently
diagnosed embryonal tumors of the central nervous system.
Current therapies cause severe neurological and cognitive
side effects including secondary malignancies. Cellular
immunotherapy might be key to improve survival and to avoid
morbidity. Efficient killing of tumor cells using
immunotherapy requires to overcome cancer-associated
strategies to evade cytotoxic immune responses. Here, we
examined the immune response and immune evasion strategies
in pediatric medulloblastomas. Cytotoxic T-cells,
infiltrating medulloblastomas with variable activation
status, showed no correlation with overall survival of the
patients. We found limited numbers of PD1+T-cells and
complete absence of PD-L1 on medulloblastomas.
Medulloblastomas downregulated immune recognition molecules
MHC-I and CD1 d. Intriguingly, expression of granzyme
inhibitors SERPINB1 and SERPINB4 was acquired in $23\%$ and
$50\%$ of the tumors, respectively. Concluding, pediatric
medulloblastomas exploit multiple immune evasion strategies
to overcome immune surveillance. Absence of PD-L1 expression
in medulloblastoma suggest limited or no added value for
immunotherapy with PD1/PD-L1 blockers.},
cin = {B062 / L101},
ddc = {610},
cid = {I:(DE-He78)B062-20160331 / I:(DE-He78)L101-20160331},
pnm = {312 - Functional and structural genomics (POF3-312)},
pid = {G:(DE-HGF)POF3-312},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29399402},
pmc = {pmc:PMC5790383},
doi = {10.1080/2162402X.2017.1398877},
url = {https://inrepo02.dkfz.de/record/132521},
}