OsteosarcomaBone NeoplasmsCell Line, TumorTumor Cells, CulturedOsteoblastsOsteosarcoma, JuxtacorticalOsteocalcinApoptosisCell ProliferationGene Expression Regulation, NeoplasticFemoral NeoplasmsAntineoplastic AgentsCalcitriolRNA, MessengerAlkaline PhosphataseDoxorubicinMice, NudeDog Diseases24,25-Dihydroxyvitamin D 3HydroxycorticosteroidsNeoplasm InvasivenessBlotting, WesternNeoplasm MetastasisBone and BonesCell CycleMethotrexateReceptors, Parathyroid HormoneCell LineLung NeoplasmsCore Binding Factor Alpha 1 SubunitTransfectionCell MovementCell SurvivalRNA, Small InterferingTumor Suppressor Protein p53CisplatinCell DivisionDrug Resistance, NeoplasmLeg BonesReverse Transcriptase Polymerase Chain ReactionOsteoblastomaRNA, NeoplasmFormazansBase SequenceMatrix Metalloproteinase 2DogsParathyroid HormoneNeoplasm TransplantationCell Growth ProcessesHumerusSyndecan-2Retinoblastoma ProteinG2 Phase Cell Cycle CheckpointsCaspase 7Antibiotics, AntineoplasticSignal TransductionTranscription, Genetic