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2014 ; 4
(ä): 966-75
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MycN promotes TRPM7 expression and cell migration in neuroblastoma through a
process that involves polyamines
#MMPMID25426416
Lange I
; Koomoa DL
FEBS Open Bio
2014[]; 4
(ä): 966-75
PMID25426416
show ga
Neuroblastoma is an extra-cranial solid cancer in children. MYCN gene
amplification is a prognostic indicator of poor outcome in neuroblastoma. Recent
studies have shown that the multiple steps involved in cell migration are
dependent on the availability of intracellular calcium (Ca(2+)). Although
significant advances have been made in understanding the role of Ca(2+) during
migration, little has been achieved towards understanding its impact on the
progression of diseases such as cancer. Interestingly, previous studies showed
that cancer cell migration is regulated by TRPM7, a calcium-permeable ion
channel. The objective of the current study was to elucidate the mechanism by
which MycN promotes NB cell migration and the mechanism regulating TRPM7
expression. The results showed that MycN increased TRPM7 expression, induced
TRPM7 channel activity, increased intracellular Ca(2+) signaling, and promoted
cell migration in NB cells. The results also showed that inhibition or
down-regulation of ornithine decarboxylase (ODC) inhibited TRPM7 expression, a
process that was reversed by spermidine. Overall, this study provides evidence
that MycN promotes TRPM7 expression and cell migration through a mechanism that
involves ODC synthesis of polyamines.