2022
Clinical outcomes with alpelisib (ALP) plus fulvestrant (FUL) after prior treatment (tx) with FUL in patients (pts) with advanced breast cancer (ABC): A real-world (RW) analysis.
O'Shaughnessy J, Woeckel A, Pistilli B, Hegg R, Vahdat L, Vuina D, ZVK P, Smith T, Kim J, Krop I. Clinical outcomes with alpelisib (ALP) plus fulvestrant (FUL) after prior treatment (tx) with FUL in patients (pts) with advanced breast cancer (ABC): A real-world (RW) analysis. Journal Of Clinical Oncology 2022, 40: 1055-1055. DOI: 10.1200/jco.2022.40.16_suppl.1055.Peer-Reviewed Original ResearchAdvanced breast cancerEndocrine-based therapyPIK3CA mutationsMetastatic settingClinical outcomesCyclin-dependent kinase 4/6 inhibitorsDe-identified electronic health record dataHuman epidermal growth factor receptorImmediate prior therapyLines of therapyProgression-free survivalProgression/deathElectronic health record dataDate of deathHealth record dataEpidermal growth factor receptorReal-world analysisGrowth factor receptorNCCN guidelinesPrior chemotherapyPrior therapyMedian durationMedian timeSubsequent therapyClinical benefitLongitudinal circulating tumor DNA (ctDNA) whole-exome sequencing (WES) in the phase Ib/II trial of palbociclib and bazedoxifene reveals genomic dynamics and clonal evolution with the acquisition of treatment resistance in hormone receptor-positive, HER2-negative (HR+ HER2-), advanced breast cancer (ABC).
Grinshpun A, Tsuji J, Li T, Russo D, Anderson L, Rees R, Cibulskis C, Leshchiner I, Stewart C, Tung N, Krop I, Winer E, Tolaney S, Getz G, Jeselsohn R. Longitudinal circulating tumor DNA (ctDNA) whole-exome sequencing (WES) in the phase Ib/II trial of palbociclib and bazedoxifene reveals genomic dynamics and clonal evolution with the acquisition of treatment resistance in hormone receptor-positive, HER2-negative (HR+ HER2-), advanced breast cancer (ABC). Journal Of Clinical Oncology 2022, 40: 1058-1058. DOI: 10.1200/jco.2022.40.16_suppl.1058.Peer-Reviewed Original Research
2021
The impact of tumor epithelial and microenvironmental heterogeneity on treatment responses in HER2-positive breast cancer
Janiszewska M, Stein S, Filho O, Eng J, Kingston NL, Harper NW, Rye IH, Alečković M, Trinh A, Murphy KC, Marangoni E, Cristea S, Oakes B, Winer EP, Krop I, Russnes HG, Spellman PT, Bucher E, Hu Z, Chin K, Gray JW, Michor F, Polyak K. The impact of tumor epithelial and microenvironmental heterogeneity on treatment responses in HER2-positive breast cancer. JCI Insight 2021, 6: e147617. PMID: 33886505, PMCID: PMC8262355, DOI: 10.1172/jci.insight.147617.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAged, 80 and overAntibodies, Monoclonal, HumanizedAntineoplastic Agents, ImmunologicalBreast NeoplasmsClass I Phosphatidylinositol 3-KinasesDNA Copy Number VariationsDrug Resistance, NeoplasmEpithelial CellsFemaleFibroblastsHumansMacrophagesMiddle AgedMutationNeoplasm TransplantationReceptor, ErbB-2TrastuzumabTumor MicroenvironmentVesicular Transport ProteinsConceptsBreast cancerTherapeutic resistanceHuman epidermal growth factor receptor 2HER2-positive breast cancerEpidermal growth factor receptor 2Patient-derived xenograft modelsLymphatic vessel endothelial hyaluronan receptorHER2-targeted therapiesGrowth factor receptor 2Impact of tumorFibroblastic reticular cellsFactor receptor 2Tumor epithelial cellsIntratumor heterogeneityDivergent cellular phenotypesResistance-conferring mutationsClinical outcomesPIK3CA mutationsTreatment responseClinical challengeDifferent therapiesFrequency of cellsXenograft modelReceptor 2Stromal determinants
2019
A combinatorial biomarker predicts pathologic complete response to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2+ breast cancer
Veeraraghavan J, De Angelis C, Mao R, Wang T, Herrera S, Pavlick AC, Contreras A, Nuciforo P, Mayer IA, Forero A, Nanda R, Goetz MP, Chang JC, Wolff AC, Krop IE, Fuqua SAW, Prat A, Hilsenbeck SG, Weigelt B, Reis-Filho JS, Gutierrez C, Osborne CK, Rimawi MF, Schiff R. A combinatorial biomarker predicts pathologic complete response to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2+ breast cancer. Annals Of Oncology 2019, 30: 927-933. PMID: 30903140, PMCID: PMC6594453, DOI: 10.1093/annonc/mdz076.Peer-Reviewed Original ResearchMeSH KeywordsAntineoplastic Combined Chemotherapy ProtocolsBiomarkers, TumorBreast NeoplasmsClass I Phosphatidylinositol 3-KinasesFemaleFollow-Up StudiesGene AmplificationHumansIn Situ Hybridization, FluorescenceLapatinibNeoadjuvant TherapyPhosphatidylinositol 3-KinasesPrognosisReceptor, ErbB-2Remission InductionTrastuzumabConceptsPathologic complete responsePI3K pathway statusBreast cancerHER2 ratioPI3K pathwayNeoadjuvant lapatinibComplete responseHER2 amplificationPathway statusHER2-positive breast cancerPI3K pathway alterationsHER2 amplification levelHER2 FISH ratioK pathwayAnti-HER2 therapyWild-type PIK3CAPI3K pathway activationPIK3CA mutationsClinical subtypesHER2 overexpressionFISH ratioPatientsChemotherapyHER2High PTENGenomic alterations in breast cancer: level of evidence for actionability according to ESMO Scale for Clinical Actionability of molecular Targets (ESCAT)
Condorelli R, Mosele F, Verret B, Bachelot T, Bedard P, Cortes J, Hyman D, Juric D, Krop I, Bieche I, Saura C, Sotiriou C, Cardoso F, Loibl S, Andre F, Turner N. Genomic alterations in breast cancer: level of evidence for actionability according to ESMO Scale for Clinical Actionability of molecular Targets (ESCAT). Annals Of Oncology 2019, 30: 365-373. PMID: 30715161, DOI: 10.1093/annonc/mdz036.Peer-Reviewed Original ResearchConceptsLevel of evidenceBreast cancerESMO ScaleClinical actionabilityGenomic alterationsMicrosatellite instabilityLarge randomized trialsMolecular targetsBRCA 1/2 mutationsGermline BRCA1/2 mutationsESR1 mutationsPreclinical evidenceNTRK fusionsRandomized trialsPIK3CA mutationsERBB2 mutationsBRCA1/2 mutationsRecurrent genomic alterationsMDM2 amplificationERBB2 amplificationClinical practiceDriver alterationsPTEN lossTumor genomic landscapeAntitumor activity
2018
Unraveling the clinicopathological features driving the emergence of ESR1 mutations in metastatic breast cancer
Kuang Y, Siddiqui B, Hu J, Pun M, Cornwell M, Buchwalter G, Hughes ME, Wagle N, Kirschmeier P, Jänne PA, Paweletz CP, Lin NU, Krop IE, Barry WT, Winer EP, Brown M, Jeselsohn R. Unraveling the clinicopathological features driving the emergence of ESR1 mutations in metastatic breast cancer. Npj Breast Cancer 2018, 4: 22. PMID: 30083595, PMCID: PMC6072793, DOI: 10.1038/s41523-018-0075-5.Peer-Reviewed Original ResearchMetastatic breast cancerESR1 mutationsBreast cancerMetastatic settingClinicopathological featuresPIK3CA mutationsAromatase inhibitorsER-positive metastatic breast cancerDetailed clinical dataSpecific systemic treatmentMetastatic treatmentDistant recurrenceMetastatic diseaseSystemic treatmentPrimary diseaseEndocrine resistanceCDK4/6 inhibitorsPathological featuresFulvestrant treatmentClinical dataPrior treatmentSignificant associationPatientsCancerPrevalence
2017
Low PTEN levels and PIK3CA mutations predict resistance to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2 over-expressing breast cancer
Rimawi MF, De Angelis C, Contreras A, Pareja F, Geyer FC, Burke KA, Herrera S, Wang T, Mayer IA, Forero A, Nanda R, Goetz MP, Chang JC, Krop IE, Wolff AC, Pavlick AC, Fuqua SAW, Gutierrez C, Hilsenbeck SG, Li MM, Weigelt B, Reis-Filho JS, Kent Osborne C, Schiff R. Low PTEN levels and PIK3CA mutations predict resistance to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2 over-expressing breast cancer. Breast Cancer Research And Treatment 2017, 167: 731-740. PMID: 29110152, PMCID: PMC5821069, DOI: 10.1007/s10549-017-4533-9.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAntibodies, Monoclonal, HumanizedAntineoplastic Combined Chemotherapy ProtocolsBreast NeoplasmsClass I Phosphatidylinositol 3-KinasesFemaleGene Expression Regulation, NeoplasticHumansLapatinibMiddle AgedMutationNeoadjuvant TherapyPTEN PhosphohydrolaseQuinazolinesReceptor, ErbB-2TrastuzumabConceptsPathologic complete responsePIK3CA mutationsBreast cancerPTEN expression levelsPTEN statusClinical trialsHER2-positive breast cancerNeoadjuvant clinical trialsPIK3CA mutation analysisLow PTEN expression levelsExpression levelsPI3K pathwayEvaluable patientsNeoadjuvant lapatinibComplete responsePatientsChemotherapyPTEN immunohistochemistryTumor samplesTrastuzumabCancerPathway activationK pathwayFurther studiesPTEN levelsSANDPIPER: Phase III study of the PI3-kinase (PI3K) inhibitor taselisib (GDC-0032) plus fulvestrant in patients (pts) with estrogen receptor (ER)-positive, HER2-negative locally advanced or metastatic breast cancer (BC) enriched for pts with PIK3CA- mutant tumors.
Baselga J, Cortés J, DeLaurentiis M, Dent S, Diéras V, Harbeck N, Hsu J, Jin H, Schimmoller F, Wilson T, Im Y, Jacot W, Krop I, Verma S. SANDPIPER: Phase III study of the PI3-kinase (PI3K) inhibitor taselisib (GDC-0032) plus fulvestrant in patients (pts) with estrogen receptor (ER)-positive, HER2-negative locally advanced or metastatic breast cancer (BC) enriched for pts with PIK3CA- mutant tumors. Journal Of Clinical Oncology 2017, 35: tps1119-tps1119. DOI: 10.1200/jco.2017.35.15_suppl.tps1119.Peer-Reviewed Original ResearchPIK3CA-mutant tumorsMetastatic breast cancerBreast cancerPIK3CA mutationsInvestigator-assessed progression-free survivalHER2-negative breast tumorsClinical benefit rateObjective response ratePrimary efficacy endpointProgression-free survivalPatient-reported outcomesAromatase inhibitor treatmentSelective PI3K inhibitorFrequent genomic alterationsProliferation of tumorsBC cell linesPIK3CA mutant breast cancersPI3K inhibitorsEfficacy endpointObjective responseOverall survivalPartial responseVisceral diseaseDisease recurrenceEndocrine sensitivity
2016
Pictilisib for oestrogen receptor-positive, aromatase inhibitor-resistant, advanced or metastatic breast cancer (FERGI): a randomised, double-blind, placebo-controlled, phase 2 trial
Krop IE, Mayer IA, Ganju V, Dickler M, Johnston S, Morales S, Yardley DA, Melichar B, Forero-Torres A, Lee SC, de Boer R, Petrakova K, Vallentin S, Perez EA, Piccart M, Ellis M, Winer E, Gendreau S, Derynck M, Lackner M, Levy G, Qiu J, He J, Schmid P. Pictilisib for oestrogen receptor-positive, aromatase inhibitor-resistant, advanced or metastatic breast cancer (FERGI): a randomised, double-blind, placebo-controlled, phase 2 trial. The Lancet Oncology 2016, 17: 811-821. PMID: 27155741, PMCID: PMC5524539, DOI: 10.1016/s1470-2045(16)00106-6.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAged, 80 and overBiomarkers, TumorBreast NeoplasmsDouble-Blind MethodDrug Resistance, NeoplasmEstradiolEstrogen Receptor AntagonistsFemaleFollow-Up StudiesFulvestrantHumansMiddle AgedNeoplasm Recurrence, LocalNeoplasm StagingPrognosisReceptor, ErbB-2Receptors, EstrogenSalvage TherapySurvival RateConceptsProgression-free survivalSerious adverse eventsTreatment-related serious adverse eventsWorse adverse eventsPlacebo groupAdverse eventsNon-measurable diseaseAromatase inhibitor treatmentPIK3CA mutationsBreast cancerDay 1Grade 3Inhibitor treatmentDay 15Cycle 1Median progression-free survivalHER2-negative breast cancerEndocrine-resistant breast cancerPIK3CA-mutated tumorsPhase 2 studyPhase 2 trialMetastatic breast cancerWeeks of treatmentAromatase inhibitor resistanceF Hoffmann-La Roche
2015
PIK3CAH1047R- and Her2-initiated mammary tumors escape PI3K dependency by compensatory activation of MEK-ERK signaling
Cheng H, Liu P, Ohlson C, Xu E, Symonds L, Isabella A, Muller WJ, Lin NU, Krop IE, Roberts TM, Winer EP, Arteaga CL, Zhao JJ. PIK3CAH1047R- and Her2-initiated mammary tumors escape PI3K dependency by compensatory activation of MEK-ERK signaling. Oncogene 2015, 35: 2961-2970. PMID: 26640141, PMCID: PMC4896860, DOI: 10.1038/onc.2015.377.Peer-Reviewed Original ResearchConceptsBreast cancerPIK3CA mutationsMammary tumorsHER2 amplification/overexpressionHER2-positive breast cancerHER2-positive cancersPrimary mammary tumorsHER2/HER3PIK3CA-activating mutationsHER2/neuHuman breast cancerEffective treatment approachAmplification/overexpressionCompound mouse modelMEK-ERK signalingMouse mammary glandWorse prognosisCombination therapyMammary tumorigenesisMouse modelMutant PIK3CATreatment approachesHER2Combined inhibitionCompensatory activationPI3K-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