Cell HypoxiaCell Line, TumorAnoxiaTumor Cells, CulturedTumor Markers, BiologicalNeoplasms, ExperimentalTumor BurdenTumor Necrosis Factor-alphaHypoxia, BrainNeoplasmsNeoplasm MetastasisHypoxia-Inducible Factor 1, alpha SubunitTumor Suppressor Protein p53Mammary Neoplasms, ExperimentalNeovascularization, PathologicCarcinoma, Ehrlich TumorCell ProliferationFetal HypoxiaWilms TumorNeoplasm TransplantationBrain NeoplasmsOxygenGenes, Tumor SuppressorMice, NudeTumor MicroenvironmentAntigens, NeoplasmCell DivisionTransplantation, HeterologousRNA, MessengerNeoplastic Cells, CirculatingXenograft Model Antitumor AssaysAdenocarcinomaFibrosarcomaMice, Inbred BALB CCell SurvivalCarcinoid TumorTumor Suppressor ProteinsNeoplasm ProteinsApoptosisGene Expression Regulation, NeoplasticSignal TransductionImmunohistochemistryCell LineColonic NeoplasmsNeuroendocrine TumorsAntineoplastic AgentsMice, Inbred C57BLBreast NeoplasmsReverse Transcriptase Polymerase Chain ReactionTime FactorsMelanoma, ExperimentalHypoxia-Inducible Factor 1Mice, SCIDSarcoma, ExperimentalTransfectionCell Transformation, NeoplasticGliomaDNA, NeoplasmBlotting, WesternCells, Cultured