title: Absence of AKT1 mutations in glioblastoma.
abstract: BACKGROUND
  Oncogenic activation of the PI3K signalling pathway plays a pivotal role in the development of glioblastoma multiforme (GBM). A central node in PI3K downstream signalling is controlled by the serine-threonine kinase AKT1. A somatic mutation affecting residue E17 of the AKT1 gene has recently been identified in breast and colon cancer. The E17K change results in constitutive AKT1 activation, induces leukaemia in mice, and accordingly, may be therapeutically exploited to target the PI3K pathway. Assessing whether AKT1 is activated by somatic mutations in GBM is relevant to establish its role in this aggressive disease.
  
  
  RESULTS
  We performed a systematic mutational analysis of the complete coding sequence of the AKT1 gene in a panel of 109 tumor GBM samples and nine high grade astrocytoma cell lines. However, no somatic mutations were detected in the coding region of AKT1.
  
  
  CONCLUSIONS
  Our data indicate that in GBM oncogenic deregulation of the PI3K pathway does not involve somatic mutations in the coding region of AKT1.
authors.affiliation: Neurosurgical Center Amsterdam, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. f.e.bleeker@amc.uva.nl
authors.forename: Fonnet E
authors.initials: FE
authors.lastname: Bleeker
authors.forename: Simona
authors.initials: S
authors.lastname: Lamba
authors.forename: Carlo
authors.initials: C
authors.lastname: Zanon
authors.forename: Angela A
authors.initials: AA
authors.lastname: van Tilborg
authors.forename: Sieger
authors.initials: S
authors.lastname: Leenstra
authors.forename: Dirk
authors.initials: D
authors.lastname: Troost
authors.forename: Theo
authors.initials: T
authors.lastname: Hulsebos
authors.forename: W Peter
authors.initials: WP
authors.lastname: Vandertop
authors.forename: Alberto
authors.initials: A
authors.lastname: Bardelli
mesh_terms: D005260:Female; D005909:Glioblastoma / Q000201:enzymology* / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics*; D051057:Proto-Oncogene Proteins c-akt / Q000235:genetics*
chemical_list: D051057:Proto-Oncogene Proteins c-akt