Blue Rubber Bleb Nevus (BRBN) Syndrome Is Caused by Somatic TEK (TIE2) Mutations

Julie Soblet, Jaakko Kangas, Marjut Nätynki, Antonella Mendola, Raphaël Helaers, Melanie Uebelhoer, Mika Kaakinen, Maria Cordisco, Anne Dompmartin, Odile Enjolras, Simon Holden, Alan D. Irvine, Loshan Kangesu, Christine Léauté-Labrèze, Agustina Lanoel, Zerina Lokmic, Saskia Maas, Maeve A. McAleer, Anthony Penington, Paul RieuSamira Syed, Carine van der Vleuten, Rosemarie Watson, Steven J. Fishman, John B. Mulliken, Lauri Eklund, Nisha Limaye, Laurence M. Boon, Miikka Vikkula*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

107 Scopus citations


Blue rubber bleb nevus syndrome (Bean syndrome) is a rare, severe disorder of unknown cause, characterized by numerous cutaneous and internal venous malformations; gastrointestinal lesions are pathognomonic. We discovered somatic mutations in TEK, the gene encoding TIE2, in 15 of 17 individuals with blue rubber bleb nevus syndrome. Somatic mutations were also identified in five of six individuals with sporadically occurring multifocal venous malformations. In contrast to common unifocal venous malformation, which is most often caused by the somatic L914F TIE2 mutation, multifocal forms are predominantly caused by double (cis) mutations, that is, two somatic mutations on the same allele of the gene. Mutations are identical in all lesions from a given individual. T1105N-T1106P is recurrent in blue rubber bleb nevus, whereas Y897C-R915C is recurrent in sporadically occurring multifocal venous malformation: both cause ligand-independent activation of TIE2, and increase survival, invasion, and colony formation when expressed in human umbilical vein endothelial cells.

Original languageEnglish (US)
Pages (from-to)207-216
Number of pages10
JournalJournal of Investigative Dermatology
Issue number1
StatePublished - Jan 1 2017
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Dermatology
  • Cell Biology


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