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Journal Articles Nature Year : 2016

Melanoma addiction to the long non-coding RNA SAMMSON

Eleonora Leucci
  • Function : Author
Roberto Vendramin
  • Function : Author
Mark Fiers
  • Function : Author
Jasper Wouters
Enrico Radaelli
  • Function : Author
Sven Eyckerman
  • Function : Author
Carina Leonelli
  • Function : Author
Katrien Vanderheyden
  • Function : Author
Aljosja Rogiers
  • Function : Author
Els Hermans
  • Function : Author
Pieter Baatsen
  • Function : Author
Stein Aerts
Frederic Amant
  • Function : Author
Stefan van Aelst
  • Function : Author
Joost van den Oord
  • Function : Author
Bart de Strooper
  • Function : Author
Denis Lafontaine
Kris Gevaert
Jo Vandesompele
  • Function : Author
Pieter Mestdagh
  • Function : Author
Jean-Christophe Marine
  • Function : Author

Abstract

Focal amplifications of chromosome 3p13-3p14 occur in about 10% of melanomas and are associated with a poor prognosis. The melanoma-specific oncogene MITF resides at the epicentre of this amplicon. However, whether other loci present in this amplicon also contribute to melanomagenesis is unknown. Here we show that the recently annotated long non-coding RNA (lncRNA) gene SAMMSON is consistently co-gained with MITF. In addition, SAMMSON is a target of the lineage-specific transcription factor SOX10 and its expression is detectable in more than 90% of human melanomas. Whereas exogenous SAMMSON increases the clonogenic potential in trans, SAMMSON knockdown drastically decreases the viability of melanoma cells irrespective of their transcriptional cell state and BRAF, NRAS or TP53 mutational status. Moreover, SAMMSON targeting sensitizes melanoma to MAPK-targeting therapeutics both in vitro and in patient-derived xenograft models. Mechanistically, SAMMSON interacts with p32, a master regulator of mitochondrial homeostasis and metabolism, to increase its mitochondrial targeting and pro-oncogenic function. Our results indicate that silencing of the lineage addiction oncogene SAMMSON disrupts vital mitochondrial functions in a cancer-cell-specific manner; this silencing is therefore expected to deliver highly effective and tissue-restricted anti-melanoma therapeutic responses.

Dates and versions

hal-02086933 , version 1 (01-04-2019)

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Eleonora Leucci, Roberto Vendramin, Marco Spinazzi, Patrick Laurette, Mark Fiers, et al.. Melanoma addiction to the long non-coding RNA SAMMSON. Nature, 2016, 531, pp.518-22. ⟨10.1038/nature17161⟩. ⟨hal-02086933⟩
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