6533b835fe1ef96bd129f487

RESEARCH PRODUCT

PTEN status is a crucial determinant of the functional outcome of combined MEK and mTOR inhibition in cancer

Donatella Del BufaloIsabella SperdutiItalia FalconeMichele MilellaGiovanni BlandinoAnais Del CuratoloRuggero De MariaVincenzo CorboMichele SimboloTeresa De LucaMatilde TodaroAndrea SacconiGiorgio StassiMarina KonoplevaLudovica CiuffredaUrsula Cesta IncaniAldo ScarpaAntonina BenfanteSilvia MatteoniFabiana ConciatoriFederico MalusaAdriana EramoChiara BazzichettoFrancesco CognettiGiovanni SetteJames A. MccubreyMichael Andreeff

subject

0301 basic medicineMAPK/ERK pathwayPTENRNA interferenceprotein Kinase inhibitorsRNA Small InterferinghumansPhosphoinositide-3 Kinase InhibitorsAnimals; cell line tumor; drug synergism; everolimus; female; humans; Janus Kinase 1; MAP Kinase Kinase Kinases; mice; neoplastic stem cells; PTEN phosphohydrolase; phosphatidylinositol 3-Kinases; protein Kinase inhibitors; proto-oncogene Proteins c-akt; Pyridones; Pyrimidinones; RNA Interference; RNA Small Interfering; STAT3 Transcription Factor; TOR Serine-Threonine KinasesMultidisciplinaryMAPK/PI3K pathway inhibitiononcology MAPK/PI3K pathway inhibitionTOR Serine-Threonine Kinasescell lineMAPK/PI3K inhibition oncology. inhibition. PTEN gene mRNA cancer cell lines MEK/mTORMAP Kinase Kinase KinasesfemaleoncologymTORRNA InterferenceSTAT3 Transcription FactortumormicePyridonesMice NudePyrimidinonesBiologyphosphatidylinositol 3-KinasesSmall InterferingArticle03 medical and health sciencesMediatorSettore MED/04 - PATOLOGIA GENERALECell Line TumormedicinePTENAnimalsPI3K/AKT/mTOR pathwaydrug synergismSettore MED/06 - ONCOLOGIA MEDICAneoplastic stem cellsRPTORCancerJanus Kinase 1medicine.diseaseeverolimusproto-oncogene Proteins c-aktBlockade030104 developmental biologyCancer researchbiology.proteinRNAPTEN phosphohydrolase

description

AbstractCombined MAPK/PI3K pathway inhibition represents an attractive, albeit toxic, therapeutic strategy in oncology. Since PTEN lies at the intersection of these two pathways, we investigated whether PTEN status determines the functional response to combined pathway inhibition. PTEN (gene, mRNA, and protein) status was extensively characterized in a panel of cancer cell lines and combined MEK/mTOR inhibition displayed highly synergistic pharmacologic interactions almost exclusively in PTEN-loss models. Genetic manipulation of PTEN status confirmed a mechanistic role for PTEN in determining the functional outcome of combined pathway blockade. Proteomic analysis showed greater phosphoproteomic profile modification(s) in response to combined MEK/mTOR inhibition in PTEN-loss contexts and identified JAK1/STAT3 activation as a potential mediator of synergistic interactions. Overall, our results show that PTEN-loss is a crucial determinant of synergistic interactions between MAPK and PI3K pathway inhibitors, potentially exploitable for the selection of cancer patients at the highest chance of benefit from combined therapeutic strategies.

yearjournalcountryeditionlanguage
2017-02-21
10.1038/srep43013http://hdl.handle.net/11562/959266