Breast NeoplasmsCell CycleCell Line, TumorCell ProliferationTumor Cells, CulturedGene Expression Regulation, NeoplasticCell DivisionBreastReceptors, EstrogenApoptosisAntineoplastic AgentsMCF-7 CellsMice, NudeEstrogen Receptor alphaTamoxifenSignal TransductionNeoplasm ProteinsReceptor, erbB-2Estrogen AntagonistsRNA, Small InterferingDown-RegulationCell SurvivalBlotting, WesternXenograft Model Antitumor AssaysRNA, MessengerCell Cycle ProteinsNeoplasm InvasivenessDrug Resistance, NeoplasmEstradiolNeoplasm MetastasisEstrogensTumor Markers, BiologicalCarcinoma, Ductal, BreastPhosphorylationNeoplasmsCell Growth ProcessesReverse Transcriptase Polymerase Chain ReactionProto-Oncogene Proteins c-aktTransfectionDose-Response Relationship, DrugTumor Suppressor Protein p53Cell MovementColonic NeoplasmsNeoplasm TransplantationReceptors, ProgesteroneTranscription, GeneticTransplantation, HeterologousCell Cycle CheckpointsImmunohistochemistryDrug Screening Assays, AntitumorTumor BurdenMammary Neoplasms, ExperimentalLung NeoplasmsTumor Suppressor ProteinsRNA InterferenceGene Expression ProfilingOvarian NeoplasmsCell LineFlow CytometryPrognosisNeoplasms, Hormone-DependentDNA, NeoplasmTime FactorsCell Transformation, NeoplasticAdenocarcinomaG1 PhasePromoter Regions, GeneticBreast DiseasesUp-RegulationMutationMolecular Sequence DataPancreatic NeoplasmsTranscription FactorsCyclin D1Neoplasm StagingGene Knockdown TechniquesAntineoplastic Agents, HormonalProstatic NeoplasmsDrug SynergismCyclin-Dependent Kinase Inhibitor p21Genes, Tumor SuppressorMice, Inbred BALB CBase SequenceMice, SCIDGene ExpressionCarcinomaGene SilencingDNA-Binding ProteinsProtein-Serine-Threonine KinasesNeoplasms, ExperimentalDisease ProgressionMammographyOligonucleotide Array Sequence AnalysisNeovascularization, PathologicRNA, NeoplasmAntibodies, MonoclonalProto-Oncogene ProteinsEstrogen Receptor ModulatorsAntineoplastic Combined Chemotherapy ProtocolsAntineoplastic Agents, Phytogenic