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@ARTICLE{Konotop:128941,
author = {G. Konotop$^*$ and E. Bausch$^*$ and T. Nagai and A.
Turchinovich$^*$ and N. Becker$^*$ and A. Benner$^*$ and M.
Boutros$^*$ and K. Mizuno and A. Krämer$^*$ and M.-S.
Raab$^*$},
title = {{P}harmacological {I}nhibition of {C}entrosome {C}lustering
by {S}lingshot-{M}ediated {C}ofilin {A}ctivation and {A}ctin
{C}ortex {D}estabilization.},
journal = {Cancer research},
volume = {76},
number = {22},
issn = {1538-7445},
address = {Philadelphia, Pa.},
publisher = {AACR},
reportid = {DKFZ-2017-04953},
pages = {6690 - 6700},
year = {2016},
abstract = {Centrosome amplification is a hallmark of virtually all
types of cancers, including solid tumors and hematologic
malignancies. Cancer cells with extra centrosomes use
centrosome clustering (CC) to allow for successful division.
Because normal cells do not rely on this mechanism, CC is
regarded as a promising target to selectively eradicate
cells harboring supernumerary centrosomes. To identify novel
inhibitors of CC, we developed a cell-based high-throughput
screen that reports differential drug cytotoxicity for
isogenic cell populations with different centrosome
contents. We identified CP-673451 and crenolanib, two
chemically related compounds originally developed for the
inhibition of platelet-derived growth factor receptor β
(PDGFR-β), as robust inhibitors of CC with selective
cytotoxicity for cells with extra centrosomes. We
demonstrate that these compounds induce mitotic spindle
multipolarity by activation of the actin-severing protein
cofilin, leading to destabilization of the cortical actin
network, and provide evidence that this activation is
dependent on slingshot phosphatases 1 and 2 but unrelated to
PDGFR-β inhibition. More specifically, we found that
although both compounds attenuated PDGF-BB-induced
signaling, they significantly enhanced the phosphorylation
of PDGFR-β downstream effectors, Akt and MEK, in almost all
tested cancer cell lines under physiologic conditions. In
summary, our data reveal a novel mechanism of CC inhibition
depending on cofilin-mediated cortical actin destabilization
and identify two clinically relevant compounds interfering
with this tumor cell-specific target. Cancer Res; 76(22);
6690-700. ©2016 AACR.},
keywords = {Actins (NLM Chemicals) / Cofilin 1 (NLM Chemicals)},
cin = {G170 / C080 / C060 / B110 / G330},
ddc = {610},
cid = {I:(DE-He78)G170-20160331 / I:(DE-He78)C080-20160331 /
I:(DE-He78)C060-20160331 / I:(DE-He78)B110-20160331 /
I:(DE-He78)G330-20160331},
pnm = {317 - Translational cancer research (POF3-317)},
pid = {G:(DE-HGF)POF3-317},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:27634760},
doi = {10.1158/0008-5472.CAN-16-1144},
url = {https://inrepo02.dkfz.de/record/128941},
}