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@ARTICLE{Costa:143436,
author = {B. M. Costa$^*$ and T. Eisemann$^*$ and J. Strelau and I.
Spaan$^*$ and A. Korshunov$^*$ and H.-K. Liu$^*$ and P.
Bugert and P. Angel$^*$ and H. Peterziel$^*$},
title = {{I}ntratumoral platelet aggregate formation in a murine
preclinical glioma model depends on podoplanin expression on
tumor cells.},
journal = {Blood advances},
volume = {3},
number = {7},
issn = {2473-9537},
address = {Washington, DC},
publisher = {American Society of Hematology},
reportid = {DKFZ-2019-01024},
pages = {1092 - 1102},
year = {2019},
note = {DKFZ-ZMBH Alliance},
abstract = {Binding of the sialomucin-like transmembrane glycoprotein
podoplanin (PDPN) to the platelet receptor C-type
lectin-like receptor 2 induces platelet activation and
aggregation. In human high-grade gliomas, PDPN is highly
expressed both in tumor cells and in tumor-associated
astrocytes. In glioma patients, high expression of PDPN is
associated with worse prognosis and has been shown to
correlate with intratumoral platelet aggregation and an
increased risk of venous thromboembolism (VTE). To
functionally assess the role of PDPN in platelet aggregation
in vivo, we established a syngeneic orthotopic murine glioma
model in C57/Bl6 mice, based on transplantation of p53- and
Pten-deficient neural stem cells. This model is
characterized by the presence of intratumoral platelet
aggregates and by the upregulation of PDPN both in glioma
cells and in astrocytes, reflecting the characteristics of
human gliomas. Deletion of PDPN either in tumor cells or in
astrocytes resulted in glioma formation with similar
penetrance and grade compared with control mice.
Importantly, only the lack of PDPN in tumor cells, but not
in astrocytes, caused a significant reduction in
intratumoral platelet aggregates, whereas in vitro, both
cell types have similar platelet aggregation-inducing
capacities. Our results demonstrate a causative link between
PDPN and platelet aggregation in gliomas and pinpoint the
tumor cells as the major players in PDPN-induced platelet
aggregation. Our data indicate that blocking PDPN
specifically on tumor cells could represent a novel strategy
to prevent platelet aggregation and thereby reduce the risk
of VTE in glioma patients.},
cin = {A100 / B300 / A240},
ddc = {610},
cid = {I:(DE-He78)A100-20160331 / I:(DE-He78)B300-20160331 /
I:(DE-He78)A240-20160331},
pnm = {311 - Signalling pathways, cell and tumor biology
(POF3-311)},
pid = {G:(DE-HGF)POF3-311},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30948364},
pmc = {pmc:PMC6457221},
doi = {10.1182/bloodadvances.2018015966},
url = {https://inrepo02.dkfz.de/record/143436},
}