LKB1/STK11 Inactivation Leads to Expansion of a Prometastatic Tumor Subpopulation in Melanoma

Academic Article


  • Germline mutations in LKB1 (STK11) are associated with the Peutz-Jeghers syndrome (PJS), which includes aberrant mucocutaneous pigmentation, and somatic LKB1 mutations occur in 10% of cutaneous melanoma. By somatically inactivating Lkb1 with K-Ras activation (±p53 loss) in murine melanocytes, we observed variably pigmented and highly metastatic melanoma with 100% penetrance. LKB1 deficiency resulted in increased phosphorylation of the SRC family kinase (SFK) YES, increased expression of WNT target genes, and expansion of a CD24+ cell population, which showed increased metastatic behavior in vitro and in vivo relative to isogenic CD24- cells. These results suggest that LKB1 inactivation in the context of RAS activation facilitates metastasis by inducing an SFK-dependent expansion of a prometastatic, CD24+ tumor subpopulation. © 2012 Elsevier Inc.
  • Authors

    Published In

  • Cancer Cell  Journal
  • Digital Object Identifier (doi)

    Author List

  • Liu W; Monahan KB; Pfefferle AD; Shimamura T; Sorrentino J; Chan KT; Roadcap DW; Ollila DW; Thomas NE; Castrillon DH
  • Start Page

  • 751
  • End Page

  • 764
  • Volume

  • 21
  • Issue

  • 6