Author/Authors :
Vivanco، نويسنده , , Igor and Palaskas، نويسنده , , Nicolaos and Tran، نويسنده , , Chris and Finn، نويسنده , , Stephen P. and Getz، نويسنده , , Gad and Kennedy، نويسنده , , Norman J. and Jiao، نويسنده , , Jing and Rose، نويسنده , , Joshua and Xie، نويسنده , , Wanling and Loda، نويسنده , , Massimo and Golub، نويسنده , , Todd and Mellinghoff، نويسنده , , Ingo K. and Davis، نويسنده , , Roger J. and Wu، نويسنده , , Hong and Sawyers، نويسنده , , Charles L.، نويسنده ,
Abstract :
Summary
gh most oncogenic phenotypes of PTEN loss are attributed to AKT activation, AKT alone is not sufficient to induce all of the biological activities associated with PTEN inactivation. We searched for additional PTEN-regulated pathways through gene set enrichment analysis (GSEA) and identified genes associated with JNK activation. PTEN null cells exhibit higher JNK activity, and genetic studies demonstrate that JNK functions parallel to and independently of AKT. Furthermore, PTEN deficiency sensitizes cells to JNK inhibition and negative feedback regulation of PI3K was impaired in PTEN null cells. Akt and JNK activation are highly correlated in human prostate cancer. These findings implicate JNK in PI3K-driven cancers and demonstrate the utility of GSEA to identify functional pathways using genetically defined systems.
