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2015 ; 6
(11
): 8760-76
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TRPM7 maintains progenitor-like features of neuroblastoma cells: implications for
metastasis formation
#MMPMID25797249
Middelbeek J
; Visser D
; Henneman L
; Kamermans A
; Kuipers AJ
; Hoogerbrugge PM
; Jalink K
; van Leeuwen FN
Oncotarget
2015[Apr]; 6
(11
): 8760-76
PMID25797249
show ga
Neuroblastoma is an embryonal tumor derived from poorly differentiated neural
crest cells. Current research is aimed at identifying the molecular mechanisms
that maintain the progenitor state of neuroblastoma cells and to develop novel
therapeutic strategies that induce neuroblastoma cell differentiation. Mechanisms
controlling neural crest development are typically dysregulated during
neuroblastoma progression, and provide an appealing starting point for drug
target discovery. Transcriptional programs involved in neural crest development
act as a context dependent gene regulatory network. In addition to BMP, Wnt and
Notch signaling, activation of developmental gene expression programs depends on
the physical characteristics of the tissue microenvironment. TRPM7, a
mechanically regulated TRP channel with kinase activity, was previously found
essential for embryogenesis and the maintenance of undifferentiated neural crest
progenitors. Hence, we hypothesized that TRPM7 may preserve progenitor-like,
metastatic features of neuroblastoma cells. Using multiple neuroblastoma cell
models, we demonstrate that TRPM7 expression closely associates with the
migratory and metastatic properties of neuroblastoma cells in vitro and in vivo.
Moreover, microarray-based expression profiling on control and TRPM7 shRNA
transduced neuroblastoma cells indicates that TRPM7 controls a developmental
transcriptional program involving the transcription factor SNAI2. Overall, our
data indicate that TRPM7 contributes to neuroblastoma progression by maintaining
progenitor-like features.