AngiopoietinsAngiopoietin-2Angiopoietin-1Receptor, TIE-2Receptor, TIE-1Receptors, TIEVascular Endothelial Growth Factor ANeovascularization, PhysiologicAngiogenesis Inducing AgentsVascular Endothelial Growth FactorsNeovascularization, PathologicEndothelial Growth FactorsReceptor Protein-Tyrosine KinasesLymphokinesMembrane GlycoproteinsIntercellular Signaling Peptides and ProteinsBlood VesselsEndothelial CellsEndothelium, VascularProteinsVascular Endothelial Growth Factor Receptor-1RNA, MessengerReverse Transcriptase Polymerase Chain ReactionImmunohistochemistrySignal TransductionProto-Oncogene ProteinsCells, CulturedBlotting, Western