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2017 ; 8
(12
): 19478-19490
Nephropedia Template TP
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English Wikipedia
Targeting basal-like breast tumors with bromodomain and extraterminal domain
(BET) and polo-like kinase inhibitors
#MMPMID28061448
Nieto-Jiménez C
; Alcaraz-Sanabria A
; Pérez-Peña J
; Corrales-Sánchez V
; Serrano-Heras G
; Galán-Moya EM
; Serrano-Oviedo L
; Montero JC
; Burgos M
; Llopis J
; Pandiella A
; Ocaña A
Oncotarget
2017[Mar]; 8
(12
): 19478-19490
PMID28061448
show ga
Metastatic triple negative breast cancer (TNBC) is an incurable disease with
limited therapeutic options, and no targeted therapies available. Triple negative
tumors and the basal-like genomic subtype, are both characterized by a high
proliferation rate and an increase in cell division. In this context, protein
kinases involved in the mitotic formation have a relevant role in this tumor
subtype. Recently, Bromodomain and extraterminal domain (BET) inhibitors have
shown to be active in this disease by modulating the expression of several
transcription factors. In this article, by using an "in silico" approach, we
identified genomic functions that can be inhibited pharmacologically in
basal-like tumors. Functional annotation analyses identified "cell division" and
"regulation of transcription" as upregulated functions. When focus on cell
division, we identified the polo-like kinase 1 (PLK) as an upregulated kinase.
The PLK inhibitor Volasertib had the strongest anti-proliferative effect compared
with other inhibitors against mitotic kinases. Gene expression analyses
demonstrated that the BET inhibitor JQ1 reduced the expression of kinases
involved in cell division, and synergized with Volasertib in a panel of triple
negative cell lines. Combination of both agents augmented cell death. Similarly,
combination of both compounds reduced the expression of stem cell markers.
Globally, this data demonstrates the synergistic interaction between BET and PLK
inhibitors, paving the way for their future clinical development.