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2014 ; 21
(4
): 507-20
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Acid sphingomyelinase determines melanoma progression and metastatic behaviour
via the microphtalmia-associated transcription factor signalling pathway
#MMPMID24317198
Bizzozero L
; Cazzato D
; Cervia D
; Assi E
; Simbari F
; Pagni F
; De Palma C
; Monno A
; Verdelli C
; Querini PR
; Russo V
; Clementi E
; Perrotta C
Cell Death Differ
2014[Apr]; 21
(4
): 507-20
PMID24317198
show ga
Melanoma is a rapidly growing and highly metastatic cancer with high mortality
rates, for which a resolutive treatment is lacking. Identification of novel
therapeutic strategies and biomarkers of tumour stage is thus of particular
relevance. We report here on a novel biomarker and possible candidate therapeutic
target, the sphingolipid metabolising enzyme acid sphingomyelinase (A-SMase).
A-SMase expression correlates inversely with tumour stage in human melanoma
biopsies. Studies in a mouse model of melanoma and on cell lines derived from
mouse and human melanomas demonstrated that A-SMase levels of expression actually
determine the malignant phenotype of melanoma cells in terms of pigmentation,
tumour progression, invasiveness and metastatic ability. The action of A-SMase is
mediated by the activation of the extracellular signal-regulated kinase, the
subsequent proteasomal degradation of the Microphtalmia-associated transcription
factor (Mitf) and inhibition of cyclin-dependent kinase 2, Bcl-2 and c-Met,
downstream targets of Mitf involved in tumour cell proliferation, survival and
metastatisation.