0000000000216643

AUTHOR

Gabriel N. Hortobagyi

showing 5 related works from this author

Prognostic impact of phosphorylated HER-2 in HER-2+ primary breast cancer.

2011

Abstract Purpose. Tyrosine 1248 is one of the autophosphorylation sites of human epidermal growth factor receptor (HER)-2. We determined the prognostic value of the expression level of tyrosine 1248–phosphorylated HER-2 (pHER-2) in patients with HER-2+ primary breast cancer using a reverse-phase protein array. Patients and Methods. The optimal cutoff value of pHER-2 for segregating disease-free survival (DFS) was determined by receiver operating characteristic (ROC) curve analysis. Five-year DFS for pHER-2 expression level was estimated with the Kaplan-Meier method using both derivation (n = 162) and validation (n = 227) cohorts. Results. Of the 162 patients in the derivation cohort, 26 had…

OncologyAdultCancer Researchmedicine.medical_specialtyPathologyReceptor ErbB-2Breast NeoplasmsMetastasesDisease-Free SurvivalBreast cancerBreast cancerReverse-phase protein arrayInternal medicineBreast CancermedicineHumansTyrosinePhosphorylationIn Situ Hybridization FluorescenceAgedAged 80 and overReceiver operating characteristicintegumentary systembusiness.industryAutophosphorylationReverse phase protein lysate microarrayMiddle Agedmedicine.diseasePrognosisImmunohistochemistryOncologyHER-2PhosphorylationImmunohistochemistryFemalePrimary breast cancerbusinessThe oncologist
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PI3K pathway mutations and PTEN levels in primary and metastatic breast cancer.

2011

Abstract The purpose of this work was to determine whether there are differences in PIK3CA mutation status and PTEN protein expression between primary and matched metastatic breast tumors as this could influence patient management. Paraffin sections of 50 μm were used for DNA extraction and slides of 3 μm for immunohistochemistry (IHC) and FISH. Estrogen receptor, progesterone receptor, and HER2 IHC were repeated in a central laboratory for both primary tumors and metastases. PTEN levels were assessed by IHC and phosphoinositide 3-kinase (PI3K) pathway mutations were detected by a mass spectroscopy–based approach. Median age was 48 years (range: 30–83 years). Tumor subtype included 72% horm…

AdultCancer Researchmedicine.medical_specialtyClass I Phosphatidylinositol 3-KinasesReceptor ErbB-2Breast Neoplasmsmedicine.disease_causeArticleMetastasisMetastasisPhosphatidylinositol 3-KinasesBreast cancerInternal medicineBreast CancermedicinePTENHumansPTEN lossReceptorneoplasmsPI3K/AKT/mTOR pathwayAgedAged 80 and overMutationbiologyPTEN PhosphohydrolaseMiddle Agedmedicine.diseaseMetastatic breast cancerEndocrinologyOncologyReceptors EstrogenMutationbiology.proteinCancer researchImmunohistochemistryFemalePIK3CA mutationsReceptors ProgesteroneSignal TransductionMolecular cancer therapeutics
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Characterization of a Naturally Occurring Breast Cancer Subset Enriched in Epithelial-to-Mesenchymal Transition and Stem Cell Characteristics

2009

Abstract Metaplastic breast cancers (MBC) are aggressive, chemoresistant tumors characterized by lineage plasticity. To advance understanding of their pathogenesis and relatedness to other breast cancer subtypes, 28 MBCs were compared with common breast cancers using comparative genomic hybridization, transcriptional profiling, and reverse-phase protein arrays and by sequencing for common breast cancer mutations. MBCs showed unique DNA copy number aberrations compared with common breast cancers. PIK3CA mutations were detected in 9 of 19 MBCs (47.4%) versus 80 of 232 hormone receptor–positive cancers (34.5%; P = 0.32), 17 of 75 HER-2–positive samples (22.7%; P = 0.04), 20 of 240 basal-like c…

Receptors SteroidCancer ResearchPathologymedicine.medical_specialtyTranscription GeneticClass I Phosphatidylinositol 3-KinasesBreast NeoplasmsArticleCohort StudiesProto-Oncogene Proteins p21(ras)Phosphatidylinositol 3-KinasesBreast cancerProto-Oncogene ProteinsBiomarkers TumormedicineHumansRNA NeoplasmEpithelial–mesenchymal transitionskin and connective tissue diseasesComparative Genomic HybridizationMetaplasiabiologyGene Expression ProfilingCD44PTEN PhosphohydrolaseCancerEpithelial CellsMesenchymal Stem CellsSarcomaDNA NeoplasmMetaplastic Breast Carcinomamedicine.diseaseClaudin-LowOncologyMutationCarcinoma Squamous Cellras Proteinsbiology.proteinCancer researchFemaleBreast diseaseStem cellProto-Oncogene Proteins c-aktCancer Research
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The natural history of breast carcinoma in patients withor = 10 metastatic axillary lymph nodes before and after the advent of adjuvant therapy: a mu…

2005

BACKGROUND The majority of patients with breast carcinoma with ≥ 10 metastatic axillary lymph nodes (ALNs) develop recurrent disease within 5 years from diagnosis. The purpose of the current study, performed retrospectively, was to characterize the natural history of this subset of patients, both before and after the advent of adjuvant anthracycline-based chemotherapy and tamoxifen. METHODS Retrospectively, patients with primary breast carcinoma (N = 882) with ≥ 10 metastatic ALNs, treated between 1954 and 1998, were selected from 3 institutions: The University of Texas M. D. Anderson Cancer Center (Houston, TX); the Institut Gustave Roussy (Villejuif, France); and Hospital Clinico Universi…

OncologyCancer Researchmedicine.medical_specialtyAxillary lymph nodesAnthracyclineBreast NeoplasmsDisease-Free SurvivalMetastasisInstitut Gustave RoussyInternal medicineAntineoplastic Combined Chemotherapy ProtocolsmedicineAdjuvant therapyHumansAnthracyclinesRetrospective Studiesbusiness.industryCarcinomaCancerMiddle Agedmedicine.diseasePrognosisCombined Modality TherapySurgerySurvival RateTamoxifenmedicine.anatomical_structureOncologyChemotherapy AdjuvantLymphatic MetastasisAxillaHormonal therapyFemalebusinessBreast carcinomaFollow-Up StudiesCancer
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Evaluation of a 30-gene paclitaxel, fluorouracil, doxorubicin and cyclophosphamide chemotherapy response predictor in a multicenter randomized trial …

2010

Abstract Purpose: We examined in a prospective, randomized, international clinical trial the performance of a previously defined 30-gene predictor (DLDA-30) of pathologic complete response (pCR) to preoperative weekly paclitaxel and fluorouracil, doxorubicin, and cyclophosphamide (T/FAC) chemotherapy, and assessed if DLDA-30 also predicts increased sensitivity to FAC-only chemotherapy. We compared the pCR rates after T/FAC versus FACx6 preoperative chemotherapy. We also did an exploratory analysis to identify novel candidate genes that differentially predict response in the two treatment arms. Experimental Design: Two hundred and seventy-three patients were randomly assigned to receive eith…

OncologyAdultCancer Researchmedicine.medical_specialtyCyclophosphamidePaclitaxelmedicine.drug_classmedicine.medical_treatmentBreast NeoplasmsAntimetaboliteBiomarkers PharmacologicalArticleBreast cancerPredictive Value of TestsInternal medicineAntineoplastic Combined Chemotherapy ProtocolsmedicineBiomarkers TumorHumansDoxorubicinCyclophosphamideAgedChemotherapybusiness.industryCarcinoma Ductal BreastCancerMiddle Agedmedicine.diseasePrognosisSurgeryGene Expression Regulation NeoplasticTreatment OutcomeOncologyFluorouracilDoxorubicinFemaleBreast diseaseFluorouracilbusinessmedicine.drug
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