2019
Quantitative assessment of immune cell populations and associations with clinical outcomes in African-American (AA) versus Caucasian triple-negative breast cancer (TNBC).
O'Meara T, Yaghoobi V, Blenman K, Pelekanou V, Silber A, Rimm D, Pusztai L. Quantitative assessment of immune cell populations and associations with clinical outcomes in African-American (AA) versus Caucasian triple-negative breast cancer (TNBC). Journal Of Clinical Oncology 2019, 37: e14180-e14180. DOI: 10.1200/jco.2019.37.15_suppl.e14180.Peer-Reviewed Original ResearchTriple-negative breast cancerDisease-free survivalBetter disease-free survivalPD-L1 expressionCD68 expressionAA TNBCStromal PD-L1 expressionPD-L1 protein expressionCaucasian casesHigher TIL countsTumor immune microenvironmentImmune cell populationsHigh CD68 expressionHigh CD68Similar CD8Stromal TILsClinical characteristicsDiagnosis dateTIL countPD-L1Clinical outcomesPredictive factorsCD8 expressionClinical variablesImmune microenvironmentImmune profiling of pre- and post-treatment breast cancer tissues from the SWOG S0800 neoadjuvant trial
Li X, Warren S, Pelekanou V, Wali V, Cesano A, Liu M, Danaher P, Elliott N, Nahleh ZA, Hayes DF, Hortobagyi GN, Barlow WE, Hatzis C, Pusztai L. Immune profiling of pre- and post-treatment breast cancer tissues from the SWOG S0800 neoadjuvant trial. Journal For ImmunoTherapy Of Cancer 2019, 7: 88. PMID: 30967156, PMCID: PMC6457012, DOI: 10.1186/s40425-019-0563-7.Peer-Reviewed Original ResearchConceptsPathologic complete responseResidual diseaseTIL countGene expression levelsHigh expressionCellular stressNeoadjuvant chemotherapyImmune genesImmune-related genesStromal genesImmune functionImmune microenvironment changesMost immune functionsGenesCell typesPD-L1 protein expressionStem cellsHigher TIL countsPD-L1 expressionExpression levelsPrimary breast cancerT-cell markersImmune cell typesProtein expressionStromal functionImmune microenvironment of triple-negative breast cancer in African-American and Caucasian women
O’Meara T, Safonov A, Casadevall D, Qing T, Silber A, Killelea B, Hatzis C, Pusztai L. Immune microenvironment of triple-negative breast cancer in African-American and Caucasian women. Breast Cancer Research And Treatment 2019, 175: 247-259. PMID: 30725384, PMCID: PMC6666415, DOI: 10.1007/s10549-019-05156-5.Peer-Reviewed Original ResearchConceptsTriple-negative breast cancerCaucasian breast cancersER-positive cancersBreast cancerTIL countImmune microenvironmentCaucasian patientsMolecular subtypesAA TNBCHuman epidermal growth factor receptor 2Epidermal growth factor receptor 2Pathologic complete responseGrowth factor receptor 2Immune cell distributionImmune cell populationsCancer Genome Atlas (TCGA) databaseConsistent racial differencesFactor receptor 2Immune gene expressionImmune attenuationNeoadjuvant chemotherapyLymphocyte countLymphocyte infiltrationComplete responseTNBC cases
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
Effect of neoadjuvant chemotherapy on tumor-infiltrating lymphocytes and PD-L1 expression in breast cancer and its clinical significance
Pelekanou V, Carvajal-Hausdorf DE, Altan M, Wasserman B, Carvajal-Hausdorf C, Wimberly H, Brown J, Lannin D, Pusztai L, Rimm DL. Effect of neoadjuvant chemotherapy on tumor-infiltrating lymphocytes and PD-L1 expression in breast cancer and its clinical significance. Breast Cancer Research 2017, 19: 91. PMID: 28784153, PMCID: PMC5547502, DOI: 10.1186/s13058-017-0884-8.Peer-Reviewed Original ResearchConceptsStromal tumor-infiltrating lymphocytesPD-L1 expressionTumor-infiltrating lymphocytesRecurrence-free survivalNeoadjuvant chemotherapyResidual cancer tissueTIL countBreast cancerCancer tissuesDeath ligand 1 (PD-L1) protein expressionNode-positive breast cancerImproved recurrence-free survivalPD-L1 protein expressionHigher TIL countsPD-L1 statusProtein expressionBreast cancer patientsBreast cancer tissuesPost-treatment samplesPrechemotherapy samplesTIL infiltrationResidual cancerImmune markersResidual diseasePatient cohortDifferences in the immune microenvironment and genomic characteristics of TNBC in African American women compared to other races.
Szekely B, Safonov A, Karn T, Bhagwagar S, Killelea B, Silber A, Hatzis C, Pusztai L. Differences in the immune microenvironment and genomic characteristics of TNBC in African American women compared to other races. Journal Of Clinical Oncology 2017, 35: e13028-e13028. DOI: 10.1200/jco.2017.35.15_suppl.e13028.Peer-Reviewed Original ResearchTriple-negative breast cancerNon-AA patientsImmune microenvironmentAfrican American womenImmune signaturesNeoantigen loadImmune metagenesLower pathologic complete response (pCR) ratesPathologic complete response rateComplete response rateNegative breast cancerAmerican womenMann-Whitney U testSignificant differencesClonal heterogeneityTCGA data setsDeletion loadNeoadjuvant therapyLymphocyte countTIL countAA patientsOverall mutational loadHistologic tumorsBreast cancerTreatment responseEffects of neoadjuvant chemotherapy (NAC) on tumor infiltrating lymphocytes (TIL) and PD-L1 expression in the SWOG S0800 clinical trial.
Pelekanou V, Barlow W, von Wahlde M, Wasserman B, Lo Y, Hayes D, Hortobagyi G, Gralow J, Tripathy D, Livingston R, Porter P, Nahleh Z, Rimm D, Pusztai L. Effects of neoadjuvant chemotherapy (NAC) on tumor infiltrating lymphocytes (TIL) and PD-L1 expression in the SWOG S0800 clinical trial. Journal Of Clinical Oncology 2017, 35: 519-519. DOI: 10.1200/jco.2017.35.15_suppl.519.Peer-Reviewed Original ResearchPD-L1 expressionNeoadjuvant chemotherapyNAC armTIL countClinical trialsImmune parametersNAC samplesBaseline PD-L1 expressionPathologic complete response rateDose-dense doxorubicinComplete response ratePD-L1 immunohistochemistryHER2-negative casesMinority of casesNab-paclitaxelResidual diseaseMean changeResponse rateLogistic regressionTILsBaselineEpithelial cellsHigh PCRChemotherapyTumors