Comment on

• Wnt activity defines colon cancer stem cells and is regulated by the microenvironment.

  Vermeulen L, De Sousa E Melo F, van der Heijden M, Cameron K, de Jong JH, Borovski T, Tuynman JB, Todaro M, Merz C, Rodermond H, Sprick MR, Kemper K, Richel DJ, Stassi G, Medema JP. Vermeulen L, et al. Nat Cell Biol. 2010 May;12(5):468-76. doi: 10.1038/ncb2048. Epub 2010 Apr 25. Nat Cell Biol. 2010. PMID: 20418870