Cell Line, TumorCell LineBreast NeoplasmsGerm CellsTumor Cells, CulturedBreastGene Expression Regulation, NeoplasticCell ProliferationAntineoplastic AgentsApoptosisReceptors, EstrogenMCF-7 CellsMice, NudeNeoplasm InvasivenessRNA, MessengerCell Line, TransformedDrug Resistance, NeoplasmReceptor, erbB-2TamoxifenNeoplasm ProteinsReverse Transcriptase Polymerase Chain ReactionTransfectionCell DivisionBlotting, WesternNeoplasm MetastasisSignal TransductionCarcinoma, Ductal, BreastCell SurvivalRNA, Small InterferingDrug Screening Assays, AntitumorEstrogen Receptor alphaReceptors, ProgesteroneDown-RegulationCell CycleCell MovementXenograft Model Antitumor AssaysGene Expression ProfilingNeoplasm TransplantationEstrogen AntagonistsBase SequenceTransplantation, HeterologousPromoter Regions, GeneticMolecular Sequence DataEstradiolLung NeoplasmsTumor Markers, BiologicalColonic NeoplasmsImmunohistochemistryDNA, NeoplasmNeoplasms, Hormone-DependentOvarian NeoplasmsEstrogensRNA InterferenceCell Growth ProcessesRNA, NeoplasmPhosphorylationGene ExpressionDose-Response Relationship, DrugNeoplasmsUp-RegulationCarcinomaFlow CytometryMammary Neoplasms, ExperimentalGene SilencingAntineoplastic Agents, HormonalTranscription, GeneticEstrogen Receptor ModulatorsDrug SynergismMutationOligonucleotide Array Sequence AnalysisCell Transformation, NeoplasticAntineoplastic Agents, PhytogenicTumor Suppressor Protein p53AdenocarcinomaPrognosisReceptor, Epidermal Growth FactorBreast DiseasesGene Knockdown TechniquesTranscription FactorsInhibitory Concentration 50Antibodies, MonoclonalMice, SCIDEpithelial CellsTime FactorsProto-Oncogene Proteins c-aktDNA-Binding ProteinsDoxorubicinProto-Oncogene ProteinsProstatic NeoplasmsDNA MethylationPhenotypeMammary Glands, HumanPancreatic NeoplasmsTumor Stem Cell AssayTumor Suppressor ProteinsEnzyme InhibitorsMammographyNeoplastic Stem CellsGene AmplificationProto-Oncogene Proteins c-bcl-2