Molecular Heterogeneity and Response to Neoadjuvant Human Epidermal Growth Factor Receptor 2 Targeting in CALGB 40601, a Randomized Phase III Trial of Paclitaxel Plus Trastuzumab With or Without Lapatinib
Carey LA, Berry DA, Cirrincione CT, Barry WT, Pitcher BN, Harris LN, Ollila DW, Krop IE, Henry NL, Weckstein DJ, Anders CK, Singh B, Hoadley KA, Iglesia M, Cheang MC, Perou CM, Winer EP, Hudis CA. Molecular Heterogeneity and Response to Neoadjuvant Human Epidermal Growth Factor Receptor 2 Targeting in CALGB 40601, a Randomized Phase III Trial of Paclitaxel Plus Trastuzumab With or Without Lapatinib. Journal Of Clinical Oncology 2015, 34: 542-549. PMID: 26527775, PMCID: PMC4980567, DOI: 10.1200/jco.2015.62.1268.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAntineoplastic Combined Chemotherapy ProtocolsBreast NeoplasmsCarcinomaEstrogen Receptor alphaFemaleGene ExpressionHumansImmunoglobulin GLapatinibMiddle AgedNeoadjuvant TherapyNeoplasm, ResidualPaclitaxelQuinazolinesReceptor, ErbB-2Receptors, EstrogenReceptors, ProgesteroneRNA, MessengerTrastuzumabTreatment OutcomeTumor MicroenvironmentTumor Suppressor Protein p53Young AdultConceptsPathologic complete response rateCALGB 40601Dual therapyIntrinsic subtypesHormone receptor-negative diseaseRandomized phase III trialHuman epidermal growth factor receptor 2End pointHER2-positive breast cancerEpidermal growth factor receptor 2Correlative end pointsDual HER2 blockadeHER2-positive diseaseComplete response ratePrimary end pointPhase III trialsProgression-free survivalReceptor-negative diseaseAddition of lapatinibGrowth factor receptor 2Immune cell signaturesFactor receptor 2Gene expression-based assaysMolecular featuresDual HER2PI3K-p110α mediates resistance to HER2-targeted therapy in HER2+, PTEN-deficient breast cancers
Wang Q, Liu P, Spangle JM, Von T, Roberts TM, Lin NU, Krop IE, Winer EP, Zhao JJ. PI3K-p110α mediates resistance to HER2-targeted therapy in HER2+, PTEN-deficient breast cancers. Oncogene 2015, 35: 3607-3612. PMID: 26500061, PMCID: PMC4846581, DOI: 10.1038/onc.2015.406.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBreast NeoplasmsCell Line, TumorCell SurvivalClass I Phosphatidylinositol 3-KinasesDrug Resistance, NeoplasmFemaleHumansLapatinibMammary Neoplasms, ExperimentalMice, KnockoutMolecular Targeted TherapyPhosphatidylinositol 3-KinasesPhosphoinositide-3 Kinase InhibitorsProtein Kinase InhibitorsProto-Oncogene Proteins c-aktPTEN PhosphohydrolaseQuinazolinesReceptor, ErbB-2Signal TransductionThiazolesTumor BurdenXenograft Model Antitumor AssaysConceptsBreast tumorsP110β inhibitorsHuman epidermal growth factor receptor 2 (HER2) amplificationP110α inhibitionPTEN lossInhibition of HER2Treatment of HER2Human cancersPI3K pathway activationPTEN-deficient breast cancersGenetic mouse modelsPI3K/Akt signalingPTEN-deficient tumorsPI3K/AktDual HER2Therapeutic regimenHER2 inhibitionPIK3CA mutationsTumor regressionBreast cancerMouse modelXenograft modelHER2Null tumorsHER2 activation