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@ARTICLE{Granados:166360,
author = {K. Granados$^*$ and L. Hüser$^*$ and A. Federico$^*$ and
S. Sachindra$^*$ and G. Wolff and T. Hielscher$^*$ and D.
Novak$^*$ and V. Madrigal-Gamboa and Q. Sun$^*$ and M.
Vierthaler$^*$ and L. Larribère$^*$ and V. Umansky$^*$ and
J. Utikal$^*$},
title = {{T}-type calcium channel inhibition restores sensitivity to
{MAPK} inhibitors in de-differentiated and adaptive melanoma
cells.},
journal = {British journal of cancer},
volume = {122},
number = {7},
issn = {1532-1827},
address = {Edinburgh},
publisher = {Nature Publ. Group},
reportid = {DKFZ-2020-02849},
pages = {1023 - 1036},
year = {2020},
note = {#EA:A370#LA:A370#},
abstract = {Drug resistance remains as one of the major challenges in
melanoma therapy. It is well known that tumour cells undergo
phenotypic switching during melanoma progression, increasing
melanoma plasticity and resistance to mitogen-activated
protein kinase inhibitors (MAPKi).We investigated the
melanoma phenotype switching using a partial reprogramming
model to de-differentiate murine melanoma cells and target
melanoma therapy adaptation against MAPKi.Here, we show that
partially reprogrammed cells are a less proliferative and
more de-differentiated cell population, expressing a gene
signature for stemness and suppressing melanocyte-specific
markers. To investigate adaptation to MAPKi, cells were
exposed to B-Raf Proto-Oncogene (BRAF) and mitogen-activated
protein kinase kinase (MEK) inhibitors. De-differentiated
cells became less sensitive to MAPKi, showed increased cell
viability and decreased apoptosis. Furthermore, T-type
calcium channels expression increased in adaptive murine
cells and in human adaptive melanoma cells. Treatment with
the calcium channel blocker mibefradil induced cell death,
differentiation and susceptibility to MAPKi in vitro and in
vivo.In summary, we show that partial reprogramming of
melanoma cells induces de-differentiation and adaptation to
MAPKi. Moreover, we postulated a calcium channel blocker
such as mibefradil, as a potential candidate to restore
sensitivity to MAPKi in adaptive melanoma cells.},
cin = {A370 / C060},
ddc = {610},
cid = {I:(DE-He78)A370-20160331 / I:(DE-He78)C060-20160331},
pnm = {311 - Signalling pathways, cell and tumor biology
(POF3-311)},
pid = {G:(DE-HGF)POF3-311},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32063604},
pmc = {pmc:PMC7109069},
doi = {10.1038/s41416-020-0751-8},
url = {https://inrepo02.dkfz.de/record/166360},
}