PI3K/AKT pathway activation in acute myeloid leukaemias is not associated with AKT1 pleckstrin homology domain mutation.
Despite its' central role, the precise mechanisms of the phosphoinositide 3-kinase/Akt (PI3K)/Akt pathway activation in acute myeloid leukaemia (AML) have not been elucidated. Recently, a recurrent novel AKT1 pleckstrin homology domain (PHD) mutation leading to membrane translocation, constitutive AKT activation and leukaemia development in mice was described. To assess AKT1 PHD mutations in AML, we sequenced 57 specimens from 49 AML patients, all of whom showed PI3K/AKT pathway activation by analysis of total and phospho-protein expression for AKT, mTor, p70S6Kinase, S6ribosomal protein and PTEN. No mutations in AKT1 PHD were identified, making this mutation an unlikely cause of PI3K/AKT pathway activation in AML.
Pharmaceutical Genomics Division, The Translational Genomics Research Institute (TGen), Phoenix/Scottsdale, AZ, USA. rtibes@tgen.org
Raoul
R
Tibes
Steven M
SM
Kornblau
Yihua
Y
Qiu
Spyro M
SM
Mousses
Christiane
C
Robbins
Tracy
T
Moses
John D
JD
Carpten
D001798:Blood Proteins / Q000235:genetics*; D004252:DNA Mutational Analysis / Q000379:methods; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000378:metabolism*; D009154:Mutation; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism*; D010750:Phosphoproteins / Q000235:genetics*; D010766:Phosphorylation; D040081:Protein Array Analysis; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism*; D015398:Signal Transduction; D014178:Translocation, Genetic; D018909:src Homology Domains
D001798:Blood Proteins; D010750:Phosphoproteins; C039077:platelet protein P47; D019869:Phosphatidylinositol 3-Kinases; D051057:Proto-Oncogene Proteins c-akt