Umbilical VeinsHuman Umbilical Vein Endothelial CellsEndothelium, VascularUmbilical ArteriesEndothelial CellsVeinsCells, CulturedSaphenous VeinUmbilical CordFetal BloodPortal VeinCell AdhesionVaricose VeinsNeovascularization, PhysiologicEndotheliumE-SelectinVascular Cell Adhesion Molecule-1Vascular Endothelial Growth Factor AIntercellular Adhesion Molecule-1Hernia, UmbilicalCell MovementFemoral VeinPulmonary VeinsAngiogenesis InhibitorsRNA, MessengerJugular VeinsNitric Oxide Synthase Type IIINeovascularization, PathologicTumor Necrosis Factor-alphaThrombinCell Adhesion MoleculesDose-Response Relationship, DrugPregnancyCell ProliferationSignal TransductionCulture Media, ConditionedCord Blood Stem Cell TransplantationNitric OxideUmbilicusVascular Endothelial Growth Factor Receptor-2Time FactorsEpoprostenolMesenteric VeinsInterleukin-1Stress, MechanicalRenal VeinsChorioallantoic Membranevon Willebrand FactorIliac VeinCell LineCell SurvivalCell DivisionGene Expression RegulationEndothelial Growth FactorsUp-RegulationPhosphorylationVascular Endothelial Growth FactorsInterleukin-8Hepatic VeinsCoculture TechniquesUltrasonography, PrenatalLymphokinesNF-kappa BHistamineThromboplastinPopliteal VeinEnzyme InhibitorsApoptosisReverse Transcriptase Polymerase Chain ReactionMonocytesBlotting, WesternAntigens, CDEnzyme ActivationAngiogenesis Inducing AgentsAortaProto-Oncogene Proteins c-aktNeutrophilsGene ExpressionRecombinant ProteinsCell Culture TechniquesAntigens, CD31Flow CytometryReceptors, ThrombinTransfectionSubclavian VeinReceptors, Cell SurfaceInfant, NewbornFibroblast Growth Factor 2RNA, Small InterferingSplenic VeinP-SelectinPiperDrug CombinationsThrombomodulinLamininReceptors, Vascular Endothelial Growth FactorCerebral VeinsReactive Oxygen SpeciesDown-RegulationPlasminogen Inactivators