MT1-MMP modulates melanoma cell dissemination and metastasis through activation of MMP2 and RAC1

Khvaramze Shaverdashvili, Poki Wong, Jun Ma, Keman Zhang, Iman Osman, Barbara Bedogni

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


Metastatic melanoma remains the deadliest of all skin cancers with a survival rate at five years of less than 15%. MT1-MMP is a membrane-associated matrix metalloproteinase that controls pericellular proteolysis and is an important, invasion-promoting, pro-tumorigenic MMP in cancer. We show that deregulation of MT1-MMP expression happens as early as the transition from nevus to primary melanoma and continues to increase during melanoma progression. Furthermore, MT1-MMP expression is associated with poor melanoma patient outcome, underscoring a pivotal role of MT1-MMP in melanoma pathogenesis. We demonstrate that MT1-MMP is directly required for melanoma cells to metastasize, as cells deprived of MT1-MMP fail to form distant metastasis in an orthotopic mouse melanoma model. We show that MT1-MMP affects cell invasion by activating its target MMP2. Importantly, we demonstrate, for the first time, that activation of MMP2 by MT1-MMP is required to sustain RAC1 activity and promote MT1-MMP-dependent cell motility. These data highlight a novel MT1-MMP/MMP2/RAC1 signaling axis in melanoma that may represent an intriguing molecular target for the treatment of invasive melanoma.

Original languageEnglish (US)
Pages (from-to)287-296
Number of pages10
JournalPigment Cell and Melanoma Research
Issue number2
StatePublished - Mar 2014
Externally publishedYes


  • Invasion
  • MMP2
  • MT1-MMP
  • Migration
  • RAC1

ASJC Scopus subject areas

  • Oncology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Dermatology


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