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@ARTICLE{Dejaegher:164297,
author = {J. Dejaegher and L. Solie and Z. Hunin and R. Sciot and D.
Capper$^*$ and C. Siewert$^*$ and S. Van Cauter and G. Wilms
and J. van Loon and N. Ectors and S. Fieuws and S.
Pfister$^*$ and S. W. Van Gool and S. De Vleeschouwer},
title = {{DNA} {M}ethylation based glioblastoma subclassification is
related to tumoral {T} cell infiltration and patient
survival.},
journal = {Neuro-Oncology},
volume = {23},
number = {2},
issn = {1523-5866},
address = {Oxford},
publisher = {Oxford Univ. Press},
reportid = {DKFZ-2020-02380},
pages = {240-250},
year = {2021},
note = {2021 Feb 25;23(2):240-250},
abstract = {Histologically classified Glioblastomas (GBM) can have
different clinical behavior and response to therapy, for
which molecular subclassifications have been proposed. We
evaluated the relationship of epigenetic GBM subgroups with
immune cell infiltrations, systemic immune changes during
radiochemotherapy and clinical outcome.450K genome-wide DNA
methylation was assessed on tumor tissue from 93 patients
with newly diagnosed GBM, treated with standard
radiochemotherapy and experimental immunotherapy. Tumor
infiltration of T cells, myeloid cells and PD-1 expression
were evaluated. Circulating immune cell populations and
selected cytokines were assessed on blood samples taken
before and after radiochemotherapy.Forty-two tumors had a
mesenchymal, 27 a RTK II, 17 a RTK I and 7 an IDH DNA
methylation pattern Mesenchymal tumors had the highest
amount of tumor-infiltrating CD3+ and CD8+ T cells and IDH
tumors the lowest. There were no significant differences for
CD68+ cells, FoxP3+ cells and PD-1 expression between
groups. Systemically, there was a relative increase of CD8+
T cells and CD8+ PD-1 expression and a relative decrease of
CD4+ T cells after radiochemotherapy in all subgroups except
IDH tumors. Overall survival was the longest in the IDH
group (median 36 months), intermediate in RTK II tumors (27
months) and significantly lower in mesenchymal and RTK I
groups (15.5 and 16 months respectively).Methylation based
stratification of GBM is related to T cell infiltration and
survival, with IDH and mesenchymal tumors representing both
ends of a spectrum. DNA methylation profiles could be useful
in stratifying patients for immunotherapy trials.},
cin = {BE01 / B062},
ddc = {610},
cid = {I:(DE-He78)BE01-20160331 / I:(DE-He78)B062-20160331},
pnm = {312 - Funktionelle und strukturelle Genomforschung
(POF4-312)},
pid = {G:(DE-HGF)POF4-312},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33130898},
doi = {10.1093/neuonc/noaa247},
url = {https://inrepo02.dkfz.de/record/164297},
}