Endothelium, Vascular/physiology; Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology; Receptors, Granulocyte-Macrophage Colony-Stimulating Factor/metabolism; Receptors, Immunologic/metabolism; Receptors, Interleukin-3/metabolism; Receptors, Interleukin; Animals; Base Sequence; Cell Division/drug effects; Cells, Cultured; Chemotaxis/drug effects; Endothelium, Vascular/cytology; Endothelium, Vascular/drug effects; Granulocyte-Macrophage Colony-Stimulating Factor/metabolism; Humans; Interleukin-3/pharmacology; Interleukin-5/metabolism; Kinetics; Macromolecular Substances; Mice; Molecular Sequence Data; Oligodeoxyribonucleotides; Polymerase Chain Reaction; RNA/genetics; RNA/isolation & purification; RNA, Messenger/genetics; RNA, Messenger/metabolism; Receptors, Granulocyte-Macrophage Colony-Stimulating Factor/genetics; Receptors, Immunologic/genetics; Receptors, Interleukin-3/genetics; Receptors, Interleukin-5; Recombinant Proteins/pharmacology; Transcription, Genetic; Umbilical Veins