2023
Response to Neoadjuvant Therapy and Long-Term Survival in Patients With Triple-Negative Breast Cancer
Liedtke C, Mazouni C, Hess K, André F, Tordai A, Mejia J, Symmans W, Gonzalez-Angulo A, Hennessy B, Green M, Cristofanilli M, Hortobagyi G, Pusztai L. Response to Neoadjuvant Therapy and Long-Term Survival in Patients With Triple-Negative Breast Cancer. Journal Of Clinical Oncology 2023, 41: 1809-1815. PMID: 36989609, DOI: 10.1200/jco.22.02572.Peer-Reviewed Original ResearchTriple-negative breast cancerPathologic complete response rateNeoadjuvant chemotherapyResidual diseaseBreast cancerProgesterone receptorEstrogen receptorHuman epidermal growth factor receptor 2 (HER2) expressionSurvival rateEpidermal growth factor receptor 2 expressionProgression-free survival ratesM.D. Anderson Cancer CenterComplete response rateOverall survival rateAnderson Cancer CenterReceptor 2 expressionLong-term survivalBone recurrenceNeoadjuvant therapyPostrecurrence survivalVisceral metastasesWorse OSWorse survivalRelapse rateCancer Center
2021
Alpha-smooth muscle actin expression in the stroma predicts resistance to trastuzumab in patients with early-stage HER2-positive breast cancer
Vathiotis IA, Moutafi MK, Divakar P, Aung TN, Qing T, Fernandez A, Yaghoobi V, El-Abed S, Wang Y, Guillaume S, Nuciforo P, Huober J, Di Cosimo S, Kim SB, Harbeck N, Gomez H, Shafi S, Syrigos KN, Fountzilas G, Sotiriou C, Pusztai L, Warren S, Rimm DL. Alpha-smooth muscle actin expression in the stroma predicts resistance to trastuzumab in patients with early-stage HER2-positive breast cancer. Clinical Cancer Research 2021, 27: 6156-6163. PMID: 34465600, PMCID: PMC8595766, DOI: 10.1158/1078-0432.ccr-21-2103.Peer-Reviewed Original ResearchConceptsDisease-free survivalHER2-positive breast cancerShorter disease-free survivalBreast cancerQuantitative immunofluorescenceEarly-stage HER2-positive breast cancerAlpha-smooth muscle actin expressionAlpha-smooth muscle actinProgesterone receptor statusHigh α-SMA expressionDigital Spatial ProfilerΑ-SMA expressionPromising candidate biomarkerCompanion diagnostic testsMuscle actin expressionDigital spatial profilingCohort validationNeoadjuvant lapatinibAdjuvant trastuzumabReceptor statusClinical trialsUnivariate analysisEstrogen receptorMAIN OUTCOMEΑ-SMA
2018
Tumor infiltrating lymphocytes and PD-L1 expression in pre- and post-treatment breast cancers in the SWOG S0800 Phase II neoadjuvant chemotherapy trial
Pelekanou V, Barlow WE, Nahleh Z, Wasserman B, Lo YC, von Wahlde MK, Hayes D, Hortobagyi GN, Gralow J, Tripathy D, Porter P, Szekely B, Hatzis C, Rimm DL, Pusztai L. Tumor infiltrating lymphocytes and PD-L1 expression in pre- and post-treatment breast cancers in the SWOG S0800 Phase II neoadjuvant chemotherapy trial. Molecular Cancer Therapeutics 2018, 17: molcanther.1005.2017. PMID: 29588392, PMCID: PMC6548451, DOI: 10.1158/1535-7163.mct-17-1005.Peer-Reviewed Original ResearchConceptsPD-L1 expressionPathologic complete responseTIL countPosttreatment tissuePD-L1Estrogen receptorImmune checkpoint inhibitor therapyPD-L1 positivity rateTumor-infiltrating lymphocyte countsDoxorubicin/cyclophosphamideCheckpoint inhibitor therapyPD-L1 levelsMol Cancer TherNab-paclitaxelLymphocyte countResidual cancerComplete responseER statusImmune changesInhibitor therapyCox regressionPatient populationControl armClinical trialsPositivity rate
2017
Pathologic complete response (pCR) rates after neoadjuvant pertuzumab (P) and trastuzumab (H) administered concomitantly with weekly paclitaxel (T) and 5-fluorouracil/epirubicin/cyclophosphamide (FEC) chemotherapy for clinical stage I-III HER2-positive breast cancer.
Foldi J, Mougalian S, Silber A, Lannin D, Killelea B, Chagpar A, Horowitz N, Frederick C, Rispoli L, Abu-Khalaf M, Sabbath K, Sanft T, Fischbach N, Brandt D, Hofstatter E, DiGiovanna M, Pusztai L. Pathologic complete response (pCR) rates after neoadjuvant pertuzumab (P) and trastuzumab (H) administered concomitantly with weekly paclitaxel (T) and 5-fluorouracil/epirubicin/cyclophosphamide (FEC) chemotherapy for clinical stage I-III HER2-positive breast cancer. Journal Of Clinical Oncology 2017, 35: 577-577. DOI: 10.1200/jco.2017.35.15_suppl.577.Peer-Reviewed Original ResearchPathologic complete response rateHER2-positive breast cancerDual HER2 blockadeComplete response ratePCR rateEstrogen receptorHER2 blockadeBreast cancerStage IResponse rateGrade 3/4 adverse eventsSymptomatic congestive heart failureClinical stage ICompletion of chemotherapyPhase II studyTaxane-based chemotherapyCongestive heart failureEfficacy of anthracyclinesPositive breast cancerNormal cardiac functionEntire treatment durationER cohortER- cancersNeoadjuvant pertuzumabWeekly paclitaxel
2015
Racial Differences in the Use and Outcome of Neoadjuvant Chemotherapy for Breast Cancer: Results From the National Cancer Data Base
Killelea BK, Yang VQ, Wang SY, Hayse B, Mougalian S, Horowitz NR, Chagpar AB, Pusztai L, Lannin DR. Racial Differences in the Use and Outcome of Neoadjuvant Chemotherapy for Breast Cancer: Results From the National Cancer Data Base. Journal Of Clinical Oncology 2015, 33: 4267-4276. PMID: 26598753, DOI: 10.1200/jco.2015.63.7801.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAntineoplastic Combined Chemotherapy ProtocolsAsianBiomarkers, TumorBlack or African AmericanBreast NeoplasmsCarcinoma, Ductal, BreastCarcinoma, LobularChemotherapy, AdjuvantComorbidityDatabases, FactualFemaleHispanic or LatinoHumansInsurance CoverageInsurance, HealthMiddle AgedNeoadjuvant TherapyNeoplasm GradingNeoplasm StagingReceptor, ErbB-2Receptors, EstrogenReceptors, ProgesteroneTreatment OutcomeTriple Negative Breast NeoplasmsUnited StatesWhite PeopleConceptsPathologic complete responseNational Cancer Data BaseNeoadjuvant chemotherapyBreast cancerEstrogen receptorWhite womenPositive tumorsAsian womenHuman epidermal growth factor receptor 2HER2-positive breast cancerEpidermal growth factor receptor 2Timing of chemotherapyClinical T stageGrowth factor receptor 2Triple-negative tumorsPatient's zip codeHigh-grade tumorsRacial differencesZip codesFactor receptor 2Chemotherapy useComorbidity indexComplete responseT stageGrade tumors
2014
Emergence of Constitutively Active Estrogen Receptor-α Mutations in Pretreated Advanced Estrogen Receptor–Positive Breast Cancer
Jeselsohn R, Yelensky R, Buchwalter G, Frampton G, Meric-Bernstam F, Gonzalez-Angulo AM, Ferrer-Lozano J, Perez-Fidalgo JA, Cristofanilli M, Gómez H, Arteaga CL, Giltnane J, Balko JM, Cronin MT, Jarosz M, Sun J, Hawryluk M, Lipson D, Otto G, Ross JS, Dvir A, Soussan-Gutman L, Wolf I, Rubinek T, Gilmore L, Schnitt S, Come SE, Pusztai L, Stephens P, Brown M, Miller VA. Emergence of Constitutively Active Estrogen Receptor-α Mutations in Pretreated Advanced Estrogen Receptor–Positive Breast Cancer. Clinical Cancer Research 2014, 20: 1757-1767. PMID: 24398047, PMCID: PMC3998833, DOI: 10.1158/1078-0432.ccr-13-2332.Peer-Reviewed Original ResearchConceptsEstrogen receptor α mutationBreast cancerAdvanced estrogen receptor-positive breast cancerEstrogen receptor-positive breast cancerReceptor-positive breast cancerHormone-dependent breast cancerPrimary breast cancerSubgroup of patientsER-negative tumorsLine of treatmentCodon 537ER- diseaseEndocrine treatmentTreatment-naïveESR1 mutationsMetastatic diseaseCell line modelsEndocrine resistanceMetastatic tumorsReceptor constitutive activityEstrogen receptorMetastatic samplesTumor specimensCancer-related genesNatural historyTP53 mutation‐correlated genes predict the risk of tumor relapse and identify MPS1 as a potential therapeutic kinase in TP53‐mutated breast cancers
Győrffy B, Bottai G, Lehmann-Che J, Kéri G, Őrfi L, Iwamoto T, Desmedt C, Bianchini G, Turner NC, de Thè H, André F, Sotiriou C, Hortobagyi GN, Di Leo A, Pusztai L, Santarpia L. TP53 mutation‐correlated genes predict the risk of tumor relapse and identify MPS1 as a potential therapeutic kinase in TP53‐mutated breast cancers. Molecular Oncology 2014, 8: 508-519. PMID: 24462521, PMCID: PMC5528634, DOI: 10.1016/j.molonc.2013.12.018.Peer-Reviewed Original ResearchConceptsBreast cancerTP53 mutation statusPrognostic valueBC cellsMutation statusER-negative breast cancerDifferent BC cell linesFuture clinical trialsSignificant prognostic markerPotential therapeutic targetBC cell linesType of treatmentNeoadjuvant chemotherapyBC patientsClinical behaviorPrognostic markerClinical trialsConventional chemotherapyEstrogen receptorPotent small molecule inhibitorsTumor relapseSmall molecule inhibitorsTherapeutic targetClinical relevanceTP53 status
2013
Genome-wide gene expression profiling to predict resistance to anthracyclines in breast cancer patients
Haibe-Kains B, Desmedt C, Di Leo A, Azambuja E, Larsimont D, Selleslags J, Delaloge S, Duhem C, Kains JP, Carly B, Maerevoet M, Vindevoghel A, Rouas G, Lallemand F, Durbecq V, Cardoso F, Salgado R, Rovere R, Bontempi G, Michiels S, Buyse M, Nogaret JM, Qi Y, Symmans F, Pusztai L, D'Hondt V, Piccart-Gebhart M, Sotiriou C. Genome-wide gene expression profiling to predict resistance to anthracyclines in breast cancer patients. Data In Brief 2013, 1: 7-10. PMID: 26484051, PMCID: PMC4608867, DOI: 10.1016/j.gdata.2013.09.001.Peer-Reviewed Original ResearchBreast cancer patientsResponse/resistanceAnthracycline monotherapyNeoadjuvant trialsGene expression signaturesNegative tumorsCancer patientsBreast cancerClinical dataEstrogen receptorClinical OncologyPredictive valuePatientsAnthracyclinesGene expressionII alphaExpression signaturesGenome-wide gene expressionMonotherapyExpressionTumorsCancerOncologyTrialsBiomarkersInk4a/Arf−/− and HRAS(G12V) transform mouse mammary cells into triple-negative breast cancer containing tumorigenic CD49f− quiescent cells
Kai K, Iwamoto T, Kobayashi T, Arima Y, Takamoto Y, Ohnishi N, Bartholomeusz C, Horii R, Akiyama F, Hortobagyi GN, Pusztai L, Saya H, Ueno NT. Ink4a/Arf−/− and HRAS(G12V) transform mouse mammary cells into triple-negative breast cancer containing tumorigenic CD49f− quiescent cells. Oncogene 2013, 33: 440-448. PMID: 23376849, PMCID: PMC3957346, DOI: 10.1038/onc.2012.609.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell Transformation, NeoplasticCyclin-Dependent Kinase Inhibitor p16FemaleFlow CytometryImmunohistochemistryIntegrin alpha6Mammary Neoplasms, ExperimentalMiceMice, Inbred C57BLMice, KnockoutNeoplastic Stem CellsOligonucleotide Array Sequence AnalysisProto-Oncogene Proteins p21(ras)Real-Time Polymerase Chain ReactionTriple Negative Breast NeoplasmsConceptsTriple-negative breast cancerHuman triple-negative breast cancerBreast cancerTumor-initiating potentialIntratumoral heterogeneityInk4a/Claudin-low breast cancerMouse mammary tumor modelNon-mammary tumorsHigh tumor-initiating potentialMouse mammary fat padMammary cellsMammary fat padMammary tumor modelIndividual breast tumorsTumor precursor cellsQuiescent cellsTumor-initiating cellsPathological featuresProgesterone receptorMammary tumorsEstrogen receptorAnimal modelsFat padBreast tumors
2012
A Systematic Evaluation of Multi-Gene Predictors for the Pathological Response of Breast Cancer Patients to Chemotherapy
Shen K, Song N, Kim Y, Tian C, Rice SD, Gabrin MJ, Symmans WF, Pusztai L, Lee JK. A Systematic Evaluation of Multi-Gene Predictors for the Pathological Response of Breast Cancer Patients to Chemotherapy. PLOS ONE 2012, 7: e49529. PMID: 23185353, PMCID: PMC3504014, DOI: 10.1371/journal.pone.0049529.Peer-Reviewed Original ResearchConceptsMulti-gene predictorsPatients' clinical outcomesClinical outcomesCancer patientsTherapeutic responseStandard combination chemotherapyBreast cancer patientsClinical outcome measurementsPatient's therapeutic responseBreast cancer cell linesCancer cell linesNegative patientsCombination chemotherapyPatient cohortPathological responseBreast cancerEstrogen receptorClinical utilityOutcome measurementsChemotherapyPatientsCell linesOutcomesPredictorsCOXENCell Line Derived Multi-Gene Predictor of Pathologic Response to Neoadjuvant Chemotherapy in Breast Cancer: A Validation Study on US Oncology 02-103 Clinical Trial
Shen K, Qi Y, Song N, Tian C, Rice SD, Gabrin MJ, Brower SL, Symmans WF, O’Shaughnessy J, Holmes FA, Asmar L, Pusztai L. Cell Line Derived Multi-Gene Predictor of Pathologic Response to Neoadjuvant Chemotherapy in Breast Cancer: A Validation Study on US Oncology 02-103 Clinical Trial. BMC Medical Genomics 2012, 5: 51. PMID: 23158478, PMCID: PMC3536618, DOI: 10.1186/1755-8794-5-51.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAntineoplastic AgentsAntineoplastic Combined Chemotherapy ProtocolsArea Under CurveBreast NeoplasmsCell Line, TumorClinical Trials as TopicDemographyFemaleGene Expression ProfilingGene Expression Regulation, NeoplasticGenes, NeoplasmHumansMiddle AgedMultivariate AnalysisNeoadjuvant TherapyReproducibility of ResultsTreatment OutcomeUnited StatesConceptsMulti-gene predictorsBreast cancerNeoadjuvant chemotherapyCombination chemotherapyCyclophosphamide combination chemotherapyDocetaxel/capecitabineEpirubicin/cyclophosphamideER-negative patientsPathologic complete responseER-positive cancersReceiver-operating characteristic curveAU-ROCCell linesBlinded validation studyNeoadjuvant treatmentMost patientsComplete responseER statusPathologic responseClinical outcomesValidation studyResidual diseaseTx groupClinical trialsEstrogen receptorAgreement in Risk Prediction Between the 21‐Gene Recurrence Score Assay (Oncotype DX®) and the PAM50 Breast Cancer Intrinsic Classifier™ in Early‐Stage Estrogen Receptor–Positive Breast Cancer
Kelly CM, Bernard PS, Krishnamurthy S, Wang B, Ebbert MT, Bastien RR, Boucher KM, Young E, Iwamoto T, Pusztai L. Agreement in Risk Prediction Between the 21‐Gene Recurrence Score Assay (Oncotype DX®) and the PAM50 Breast Cancer Intrinsic Classifier™ in Early‐Stage Estrogen Receptor–Positive Breast Cancer. The Oncologist 2012, 17: 492-498. PMID: 22418568, PMCID: PMC3336833, DOI: 10.1634/theoncologist.2012-0007.Peer-Reviewed Original ResearchConceptsBreast cancerEstrogen receptorEarly-stage estrogen receptor-positive breast cancerRisk assignmentHuman epidermal growth factor receptor 2 (HER2) expressionEpidermal growth factor receptor 2 expressionEstrogen receptor-positive breast cancerReceptor-positive breast cancerIntermediate RS groupLuminal B cancersReceptor 2 expressionLow-risk categoryQuantitative polymerase chain reactionB cancersMore patientsPolymerase chain reactionIntermediate RSLower riskStage IRS groupCancerPAM50Risk categoriesRisk predictionChain reaction
2011
P1-07-09: Estrogen Receptor (ER) mRNA and ER-Related Gene Expression in Breast Cancers That Are 1%-10% ER-Positive by Immunohistochemistry.
Iwamoto T, Booser D, Valero V, Murray J, Koenig K, Esteva F, Ueno N, Zhang J, Shi W, Qi Y, Matsuoka J, Hortobagyi G, Hatzis C, Symmans W, Pusztai L. P1-07-09: Estrogen Receptor (ER) mRNA and ER-Related Gene Expression in Breast Cancers That Are 1%-10% ER-Positive by Immunohistochemistry. Cancer Research 2011, 71: p1-07-09-p1-07-09. DOI: 10.1158/0008-5472.sabcs11-p1-07-09.Peer-Reviewed Original ResearchER-positive casesER-positive cancersESR1 mRNA expressionGene signature scoreIHC-positive casesLuminal ABreast cancerSignature scoreMRNA expressionER-negative cancersPrimary breast cancerESR1 mRNA levelsEstrogen receptor mRNAER expressionER statusER-positivePositive cancersAffymetrix U133A gene chipsLuminal BSensitive tumorsEstrogen receptorB. ConclusionReceptor mRNAESR1 expressionPositive cases
2010
Gene Pathways Associated With Prognosis and Chemotherapy Sensitivity in Molecular Subtypes of Breast Cancer
Iwamoto T, Bianchini G, Booser D, Qi Y, Coutant C, Shiang CY, Santarpia L, Matsuoka J, Hortobagyi GN, Symmans WF, Holmes FA, O’Shaughnessy J, Hellerstedt B, Pippen J, Andre F, Simon R, Pusztai L. Gene Pathways Associated With Prognosis and Chemotherapy Sensitivity in Molecular Subtypes of Breast Cancer. Journal Of The National Cancer Institute 2010, 103: 264-272. PMID: 21191116, DOI: 10.1093/jnci/djq524.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAntineoplastic Combined Chemotherapy ProtocolsBiomarkers, TumorBreast NeoplasmsChemotherapy, AdjuvantConfounding Factors, EpidemiologicCytochrome P-450 Enzyme InhibitorsCytochrome P-450 Enzyme SystemDatabases, GeneticDrug Resistance, NeoplasmFemaleGene Expression Regulation, NeoplasticGTP-Binding ProteinsHumansMiddle AgedNeoadjuvant TherapyNeoplasm StagingPredictive Value of TestsPrognosisReceptors, EstrogenSignal TransductionTreatment OutcomeConceptsER-negative breast cancerPathological complete responseER-positive cancersER-negative cancersBreast cancerChemotherapy responseComplete responseBetter prognosisChemotherapy sensitivityLymph node-negative breast cancerNode-negative breast cancerSystemic adjuvant therapyCell cycle-related gene setsBreast cancer subtypesIngenuity Pathway AnalysisAdjuvant therapyPreoperative chemotherapyPoor prognosisPooled analysisEstrogen receptorTreatment responseMolecular subtypesAdditional cohortPrognosisStage IEstrogen and HER-2 Receptor Discordance Between Primary Breast Cancer and Metastasis
Pusztai L, Viale G, Kelly CM, Hudis CA. Estrogen and HER-2 Receptor Discordance Between Primary Breast Cancer and Metastasis. The Oncologist 2010, 15: 1164-1168. PMID: 21041379, PMCID: PMC3227913, DOI: 10.1634/theoncologist.2010-0059.Peer-Reviewed Original ResearchConceptsReceptors resultsBreast cancerHuman epidermal growth factor receptor 2 receptor statusRepeat tumor biopsiesRoutine repeat biopsyPrimary breast cancerReceptor-positive cancersReceptor-negative cancersEndocrine therapyFalse-negative resultsReceptor discordanceMetastatic diseaseReceptor statusRepeat biopsyClinical courseRecurrent cancerClinical groundsPrimary tumorTumor nestsEstrogen receptorTumor biopsiesHormone responsivenessReceptor assayCancerDiscordant resultsEstrogen Receptor Expression and Docetaxel Efficacy in Patients with Metastatic Breast Cancer: A Pooled Analysis of Four Randomized Trials
Andre F, Broglio K, Pusztai L, Berrada N, Mackey JR, Nabholtz JM, Chan S, Hortobagyi GN. Estrogen Receptor Expression and Docetaxel Efficacy in Patients with Metastatic Breast Cancer: A Pooled Analysis of Four Randomized Trials. The Oncologist 2010, 15: 476-483. PMID: 20421265, PMCID: PMC3227977, DOI: 10.1634/theoncologist.2009-0150.Peer-Reviewed Original ResearchConceptsMetastatic breast cancerEfficacy of docetaxelBreast cancerHigh response rateER expressionResponse rateEstrogen receptorHazard ratioRandomized trialsDisease progressionProgression-free survival timeCox proportional hazards modelDocetaxel-based regimenEstrogen receptor expressionProportional hazards modelEffect of docetaxelER- diseasePFS timeDocetaxel efficacyPooled analysisTumor responseReceptor expressionSurvival timeLower riskHazards modelPredictors of Tumor Progression During Neoadjuvant Chemotherapy in Breast Cancer
Caudle AS, Gonzalez-Angulo AM, Hunt KK, Liu P, Pusztai L, Symmans WF, Kuerer HM, Mittendorf EA, Hortobagyi GN, Meric-Bernstam F. Predictors of Tumor Progression During Neoadjuvant Chemotherapy in Breast Cancer. Journal Of Clinical Oncology 2010, 28: 1821-1828. PMID: 20231683, PMCID: PMC2860366, DOI: 10.1200/jco.2009.25.3286.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAged, 80 and overAnthracyclinesAntineoplastic Combined Chemotherapy ProtocolsBreast NeoplasmsBridged-Ring CompoundsCarcinoma, Ductal, BreastCarcinoma, LobularChemotherapy, AdjuvantDisease ProgressionFemaleHumansMiddle AgedNeoadjuvant TherapyReceptors, EstrogenReceptors, ProgesteroneSurvival RateTaxoidsTreatment OutcomeYoung AdultConceptsHigh Ki-67 scoreNeoadjuvant chemotherapyKi-67 scoreStable diseaseBreast cancerEstrogen receptorMultivariate analysisDistant disease-free survivalER/PR negativityFirst-line surgical approachTumor progressionMost breast cancer patientsDisease-free survivalStandard neoadjuvant chemotherapyCancer clinical stageAmerican Joint CommitteeBreast cancer patientsAfrican American raceAdvanced tumor stagePredictors of responseHigh nuclear gradeHigh tumor gradeNegative estrogen receptorNovel molecular predictorsPR negativity
2009
Prognostic impact of discordance between triple-receptor measurements in primary and recurrent breast cancer
Liedtke C, Broglio K, Moulder S, Hsu L, Kau S, Symmans WF, Albarracin C, Meric-Bernstam F, Woodward W, Theriault RL, Kiesel L, Hortobagyi GN, Pusztai L, Gonzalez-Angulo AM. Prognostic impact of discordance between triple-receptor measurements in primary and recurrent breast cancer. Annals Of Oncology 2009, 20: 1953-1958. PMID: 19596702, PMCID: PMC2791352, DOI: 10.1093/annonc/mdp263.Peer-Reviewed Original ResearchConceptsTriple receptor-negative breast cancerRecurrent breast cancerPost-recurrence survivalProgesterone receptorRecurrent tumorsBreast cancerEstrogen receptorDiscordant casesBetter post-recurrence survivalReceptor-positive breast cancerReceptor-negative breast cancerDiscordant receptor statusHormone receptor measurementsPrognostic impactReceptor statusUnfavorable survivalPathological parametersHER2 statusPoor survivalReceptor measurementsIHC scorePatientsClinical phenotypeSuboptimal reproducibilityCancerCorrelation of PIK3CA mutation-associated gene expression signature (PIK3CA-GS) with deactivation of the PI3K pathway and with prognosis within the luminal-B ER+ breast cancers
Loi S, Haibe-Kains B, Lallemand F, Pusztai L, Bardelli A, Gillett C, Ellis P, Piccart-Gebhart M, Phillips W, McArthur G, Sotiriou C. Correlation of PIK3CA mutation-associated gene expression signature (PIK3CA-GS) with deactivation of the PI3K pathway and with prognosis within the luminal-B ER+ breast cancers. Journal Of Clinical Oncology 2009, 27: 533-533. DOI: 10.1200/jco.2009.27.15_suppl.533.Peer-Reviewed Original ResearchPI3K pathwayBreast cancerPIK3CA mutationsMutation statusGene expression signaturesK pathwayClinical outcomesLuminal B breast cancerLuminal BC subtypePIK3CA mutation statusBetter clinical outcomesIndependent prognostic informationB breast cancerExpression signaturesPI3K inhibitorsPI3K inhibitionBC cohortDistinct gene expression signaturesEndocrine therapyBC samplesBC subtypesPrognostic informationFavorable outcomeEstrogen receptorMutation carriersCorrelations of estrogen receptor (ER) related genomic transcription and ER gene expression with increasing AJCC stage of ER-positive breast cancer
Andreopoulou E, Hatzis C, Booser D, Valero V, Wallace M, Sotiriou C, Hortobagyi G, Pusztai L, Symmans W. Correlations of estrogen receptor (ER) related genomic transcription and ER gene expression with increasing AJCC stage of ER-positive breast cancer. Journal Of Clinical Oncology 2009, 27: 1044-1044. DOI: 10.1200/jco.2009.27.15_suppl.1044.Peer-Reviewed Original ResearchER-positive breast cancerBreast cancerEstrogen receptorPathologic stageAJCC stageProgesterone receptorStage IIIAdvanced ER-positive breast cancerExpression levelsStage IV diseaseER gene expressionClinical samplesPatient clinical samplesPgR expression levelsInitial presentationTumor dependenceExpression of GAPDHAdvanced stageCancerGene expressionGenomic pathwayGAPDH gene expressionReceptor geneGene expression profilesFurther studies